2026-04-04T08:57:58Z https://journal.isas.or.id/index.php/JAMERE/oai

oai:ojs2.journal.isas.or.id:article/317 2023-01-16T01:53:43Z JACE:ART

oai:ojs2.journal.isas.or.id:article/80 2023-05-20T05:00:25Z JAMERE:ART driver

Uji Kekerasan Bahan Gear Sprocket Dengan Campuran Timah (Sn) Uji Kekerasan Bahan Gear Sprocket Dengan Campuran Timah (Sn) Normansyah, Normansyah Anhar, Muh Normansyah, Normansyah Anhar, Muh Hardness Test Gear Sprocket Tin Uji Kekerasan Gear Sprocket Timah The Material Test Process of Gear Sprocket includes the process of cutting the material used as the Material Test sample which is mixed or not mixed. In the sample that is mixed, namely the base metal that has been cut with a value ratio of 10:2 Ounce of Material Gear Sprocket 10 and Tin Material 2 Ounces, fusion will be carried out for the process of blending/unifying the two types of material as sample material. Test the material with the mixing, while the Gear Sprocket material sample that was not mixed was also taken a load value of 10 Ounces, for the test sample where the mixing was not carried out. The test results data from the Gear Sprocket material sample with Tin mixing with four tests from several different surface parts obtained the value 51.5, 55, 50, 53 kgf. While the sample of the Gear Sprocket material without mixing the tin, the results obtained are the values ​​of 50, 51, 50, 50 kgf. In combining the Tin Material with the base metal Gear Sprocket with the ratio of 2 Ounce Tin Material and 10 Ounce Gear Sprocket Material, the hardness results are unstable, so the value obtained from the material being treated is obtained a value that is less likely, while the material test value of the Material Gear Sprockets that are not combined have good results from each surface even though the hardness value is slightly smaller than the result of the material being treated. Proses Uji bahan material Gear Sprocket meliputi proses pemotongan material yang digunakan sebagai sampel Uji Bahan yang dilakukan pencampuran maupun tidak dilakukan pencampuran. Dalam sampel yang dilakukan pencampuran yaitu Logam dasar yang sudah dilakukan pemotongan dengan perbandingan nilai 10:2 Ons Material Gear Sprocket 10 dan Material Timah 2 Ons, akan dilakukan peleburan untuk proses pemaduan/mempersatukan kedua jenis material tersebut sebagai bahan material sampel Uji bahan dengan pencampuran tersebut, sedangkan sampel material Gear Sprocket yang tidak dilakukan pencampuran juga diambil nilai beban 10 Ons, untuk sebagai sampel pengujian yang tidak dilakukan pencampuran tersebut. Data hasil pengujian dari Sampel material Gear Sprocket dengan pencampuran Timah dengan empat kali pengujian dari beberapa bagian permukaan yang berbeda didapat nilai 51,5, 55, 50, 53 kgf. Sedangkan Sampel material Gear Sprocket yang tanpa pencampuran Timah didapat hasil nilai 50, 51, 50, 50 kgf. didalam pemaduan Material Timah dengan logam dasar Gear Sprocket dengan perbandingan Material Timah 2 Ons dan Material Gear Sprocket 10 Ons didapat hasil kekerasan yang tidak stabil, sehingga nilai yang didapat dari material yang dilakukan perlakuan tersebut didapat nilai yang kurang memungkinkan, sedangkan nilai uji bahan dari Material Gear Sprocket yang tidak dilakukan pemaduan didapat hasil yang baik dari tiap-tiap permukaanya walaupun nilai kekerasannya sedikit lebih kecil dari hasil material yang dilakukan perlakuan. Indonesian Society of Applied Science 2021-02-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/80 10.52158/jamere.v1i1.80 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 1 No. 1: February 2021; 16-19 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 1 No 1: Februari 2021; 16-19 2775-1031 10.52158/jamere.v1i1 ind https://journal.isas.or.id/index.php/JAMERE/article/view/80/45 10.52158/jamere.v1i1.80.g45 Copyright (c) 2021 Normansyah, Muh Anhar

oai:ojs2.journal.isas.or.id:article/82 2023-05-20T05:04:29Z JAMERE:ART driver

Analisis Perbandingan Teoritis Performansi Daya Mesin Mobil dan Konsumsi Bahan Bakar Spesifik Berteknologi VVT-i dan Non VVT-i Analisis Perbandingan Teoritis Performansi Daya Mesin Mobil dan Konsumsi Bahan Bakar Spesifik Berteknologi VVT-i dan Non VVT-i Dwiaji, Yudhi Chandra Mahendra, Oka Dwiaji, Yudhi Chandra Mahendra, Oka VVT-i Valve Timing ECU Crankshaft VVT-i Valve Timing ECU Crankshaft VVT-i (Variable Valve Timing with Intelligent) technology basically works to optimize engine torque at every speed and driving conditions. The mechanism will eventually produce more efficient fuel consumption and lower exhaust emissions. The workings of VVT-i technology are quite simple, namely to calculate the optimal valve opening time, the ECU (Electronic Control Unit) will adjust the engine speed, air intake volume, throttle position and water temperature. In order for the valve timing target to always be realized, the crankshaft position sensor provides a signal that is a correction response. This VVT-i system will correct valve timing or fuel and air inlet lines. Adapted to the gas pedal footing and load borne to produce optimal torque in each rotation and engine load. This technology is also claimed to have excess power that is far more optimal and saves fuel consumption, and is environmentally friendly. Mesin berteknologi VVT-i (Variable Valve Timing with Intellegence) pada dasarnya bekerja mengoptimalkan torsi mesin pada setiap kecepatan serta kondisi mengemudi. Mekanisme tersebut akhirnya akan membuahkan konsumsi BBM menjadi lebih efisien serta emisi gas buang menjadi lebih rendah. Cara kerja teknologi VVT-i cukup sederhana, yaitu untuk menghitung waktu buka tutup katup (Valve Timing) yang optimal, ECU (Electronic Control Unit) akan menyesuaikan dengan kecepatan mesin, volume udara masuk, posisi throttle dan temperatur air. Agar target valve timing senantiasa terwujud, sensor posisi crankshaft memberikan sinyal yang menjadi respon koreksi. Sistem VVT-i ini akan mengoreksi valve timing atau jalur keluar masuk bahan bakar dan udara. Disesuaikan dengan pijakan pedal gas dan beban yang ditanggung untuk menghasilkan torsi optimal di tiap putaran dan beban mesin. Teknologi ini juga diklaim memiliki kelebihan tenaga yang jauh lebih optimal dan hemat konsumsi bahan bakar, serta ramah lingkungan. Indonesian Society of Applied Science 2021-02-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/82 10.52158/jamere.v1i1.82 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 1 No. 1: February 2021; 6-15 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 1 No 1: Februari 2021; 6-15 2775-1031 10.52158/jamere.v1i1 ind https://journal.isas.or.id/index.php/JAMERE/article/view/82/44 Copyright (c) 2021 Yudhi Chandra Dwiaji, Oka Mahendra

oai:ojs2.journal.isas.or.id:article/89 2023-05-20T05:19:51Z JAMERE:ART driver

Rancang Bangun Alat Penyortir Beras Dengan Sistem Penggerak Motor Listrik Rancang Bangun Alat Penyortir Beras Dengan Sistem Penggerak Motor Listrik Prambudi, Teguh Catur Ulfiyah, Laily Hadiwijaya, Lukman Prambudi, Teguh Catur Ulfiyah, Laily Hadiwijaya, Lukman Sieve rice sorting device variation of elevation angle Ayakan Beras Penyortir Variasi Sudut Elevasi Rice is the staple food most consumed by Indonesians which is produced from milling dry unhusked rice grain. In the dry unhusked rice grain milling process, rice has different forms, namely whole and cracked rice. This is due to the poor quality of the paddy rice. The different in forms has led to a different selling value. Whole rice is more expensive than the other. Therefore, sorting was done to obtain the differences. This study was carried out to build rice sorting device with a system in the form of a launch crank mechanism as a vibration system. This device has several components consisting of two mesh and two turnbuckle eye & eye as the sieve tilt adjustment. In the tilt experiment, two variations of the angle were obtained, namely an angle of 10° and an angle of 15°. This device uses a single-phase electric motor as the driving force of the launching crankshaft. The transmission system uses a pulley and a v-belt from a single-phase electric motor that is passed to the pulley. From the test results that have been carried out two-angle variations with a capacity of 10 kg. At an angle of 15°, 69% pure rice is obtained with less optimal results because the slope of the angle is too steep. Whereas at an angle of 10°, the yield of pure rice is 85% which has a less angular slope so that the sorting of rice is maximized. Beras merupakan makanan pokok yang paling banyak dikonsumsi oleh masyarakat Indonesia yang dihasilkan dari penggilingan gabah kering. Pada proses penggilingan gabah kering terdapat beras yang berbeda bentuk yaitu beras utuh dan tidak utuh. Hal itu disebabkan oleh kualitas padi yang kurang bagus. Dari perbedaan bentuk beras memiliki nilai jual yang lebih tinggi. Beras yang utuh akan lebih mahal dibandingkan beras yang tidak utuh. Oleh karena itu dilakukan penyortiran untuk mendapatkan perbedaan beras. Penelitian ini membuat suatu alat penyotir beras dengan sistem berupa mekanisme engkol peluncur sebagai sistem getaran. Alat ini mempunyai beberapa komponen yang terdiri dari dua mesh dan dua buah turnbuckle eye & eye sebagai pengaturan kemiringan ayakan. Dalam eksperimen kemiringan didapat dua variasi sudut yaitu sudut 10° dan sudut 15°. Pada alat ini menggunakan motor listrik satu phase sebagai penggerak poros engkol peluncur. Sistem transmisi menggunakan pulley dan v-belt yang dari motor listrik satu phase yang diteruskan ke pulley. Dari hasil pengujian yang telah dilakukan variasi dua sudut dengan kapasitas 10 kg. Pada sudut 15° didapatkan beras murni 69% dengan hasil kurang maksimal karena kemiringan sudut terlalu curam. Sedangkan pada sudut 10° didapatkan hasil beras murni 85% yang mempunyai kemiringan sudut lebih minim sehingga penyortiran beras lebih maksimal. Indonesian Society of Applied Science 2021-02-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/89 10.52158/jamere.v1i1.89 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 1 No. 1: February 2021; 20-23 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 1 No 1: Februari 2021; 20-23 2775-1031 10.52158/jamere.v1i1 ind https://journal.isas.or.id/index.php/JAMERE/article/view/89/46 Copyright (c) 2021 Teguh Catur Prambudi, Laily Ulfiyah, Lukman Hadiwijaya

oai:ojs2.journal.isas.or.id:article/96 2023-05-20T05:21:22Z JAMERE:ART driver

Analisis Jumlah Tenaga Kerja Optimal Dengan Metode Work Load Analysis (WLA) di PT. RSI Analisis Jumlah Tenaga Kerja Optimal Dengan Metode Work Load Analysis (WLA) di PT. RSI Darsini Maulana, Andika Wibowo, Budi Darsini Maulana, Andika Wibowo, Budi Total Workforce Optimal Work Load Analysis (WLA) Jumlah Tenaga Kerja Optimal Work Load Analysis (WLA) Workload of employees at PT. RSI in the pressing department is still low, because in the pressing section the division of work for each employee is not optimal or evenly distributed. So it is necessary to do research with the title Analysis of the Optimal Workforce at PT. RSI. The method used for testing the optimal amount of load is the Work Load Analysis (WLA) method, which aims to calculate the optimal workload and number of workers at PT. RSI. The sample in this study were 15 employees in the pressing department which were divided into 4 sections, where section 1 had 4 employees, section 2 had 4 employees, section 3 had 4 employees, and section 4 contained 3 employees. The results of this study indicate that the workload before the research in section 1 was 52% to 70%, part 2 from 51% to 68%, part 3 from 56% to 75%, and part 4 still 71% because there was no reduction in labor., because the workload in section 4 is optimal. So the optimal number of workers in the pressing department is 3 employees in section 1, 3 employees in section 2, 3 employees, and 4 still 3 employees. Beban kerja karyawan di PT. RSI di departemen pressing masih rendah, dikarenakan pada bagian pressing pembagian kerja pada masing-masing karyawan belum optimal atau merata. Maka perlu dilakukan penelitian dengan judul Analisis Jumlah Tenaga Kerja Optimal di PT. RSI. Metode yang digunakan untuk pengujian jumlah beban yang optimal dengan metode Work Load Analysis (WLA), yang tujuannya untuk menghitung beban kerja dan jumlah tenaga kerja optimal di PT. RSI. Sampel dalam penelitian ini adalah 15 karyawan di departemen pressing yang dibagi menjadi 4 bagian, dimana bagian 1 terdapat 4 karyawan, bagian 2 terdapat 4 karyawan, bagian 3 terdapat 4 karyawan, dan bagian 4 terdapat 3 karyawan. Hasil penelitian ini menunjukan bahwa beban kerja sebelum dilakukan penelitian pada bagian 1 sebesar 52% menjadi 70%, bagian 2 dari 51% menjadi 68%, bagian 3 dari 56% menjadi 75%, dan bagian 4 masih tetap 71% karena tidak dilakukan pengurangan tenaga kerja, diakibatkan beban kerja di bagian 4 sudah optimal. Jadi jumlah tenaga kerja yang optimal di departemen pressing adalah pada bagian 1 berjumlah 3 karyawan, bagian 2 berjumlah 3 karyawan, bagian 3 berjumlah 3 karyawan, dan bagian 4 tetap berjumlah 3 karyawan. Indonesian Society of Applied Science 2021-02-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/96 10.52158/jamere.v1i1.96 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 1 No. 1: February 2021; 24-29 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 1 No 1: Februari 2021; 24-29 2775-1031 10.52158/jamere.v1i1 ind https://journal.isas.or.id/index.php/JAMERE/article/view/96/47 Copyright (c) 2021 Darsini, Andika Maulana, Budi Wibowo

oai:ojs2.journal.isas.or.id:article/98 2023-05-20T05:02:51Z JAMERE:ART driver

Perancangan Mesin Centrifugal Untuk Optimalisasi Tenaga Sortir Sampah Plastik Perancangan Mesin Centrifugal Untuk Optimalisasi Tenaga Sortir Sampah Plastik Darsini Nandha Dian, Yustinus Suprapto Darsini Nandha Dian, Yustinus Suprapto centrifugal machine design optimization sorting plastic waste perancangan mesin centrifugal optimalisasi sortir sampah plastik PT. XXX as the yield management company becomes a plastic seed product that is ready to be used as raw material in other plastic companies. Apart from the garbage production of PT. Garuda Prima Sentosa also gets unused plastic waste from domestic and foreign suppliers. In the process of processing plastic waste, still uses the sorting power manually obtained by 40 people, the results obtained are also less than the maximum there are still many other materials mixed in plastic waste from 4200 kg of plastic waste can only be repaired by other unused material as much as 915.92 kg per day. This study discusses the centrifugal machine as a separator between used plastic waste from other unused materials and minimizes the sorting power of 40 people to 8 people, and adds the unused material to 1355,308 kg per day. The design of this Centrifugal machine to be able to overcome the problems that exist in the sorting section so that it can produce cleaner plastic seeds and improve the sorting process. PT. XXX mendapatkan sampah-sampah plastik yang tidak terpakai dari supplier penyedia sampah-sampah dalam negeri maupun sampah-sampah dari luar negeri. Dalam proses pengolahan sampah plastik ini, PT. XXX masih menggunakan tenaga sortir secara manual yang berjumlah 40 orang, hasil yang diperoleh juga kurang maksimal karena masih banyak material lain yang tercampur dalam sampah plastik dari 4200 kg sampah plastik hanya dapat memisahkan material lain yang tidak terpakai sebanyak 915,92 kg per harinya. Penelitian ini bertujuan untuk merancang mesin Centrifugal sebagai alat pemisah antara sampah plastik yang terpakai dari material lain yang tidak terpakai serta meminimalisir tenaga sortir sebanyak 40 orang menjadi 8 orang, dan memaksimalkan pemisahan material yang tidak terpakai menjadi 1355,308 kg per hari. Dari perancangan mesin Centrifugal ini mampu mengatasi masalah yang ada pada bagian sortir sehingga dapat menghasilkan biji plastik yang lebih bersih dan mempercepat proses penyortiran. Indonesian Society of Applied Science 2021-02-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/98 10.52158/jamere.v1i1.98 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 1 No. 1: February 2021; 1-5 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 1 No 1: Februari 2021; 1-5 2775-1031 10.52158/jamere.v1i1 ind https://journal.isas.or.id/index.php/JAMERE/article/view/98/43 Copyright (c) 2021 Darsini, Yustinus Nandha Dian, Suprapto

oai:ojs2.journal.isas.or.id:article/217 2023-05-20T05:26:25Z JAMERE:ART driver

Analisis Postur Kerja dengan Metode Rapid Entire Body Assissment (REBA) Darsini Reza Tania Achmadi Darsini Reza Tania Achmadi Cutting laser Work posture REBA NBM Cutting laser Postur kerja REBA NBM Physical activity related to work activities on production operators is one of the jobs that needs attention. Operator activity on CV. Primavera, which is engaged in garments, especially in the fabric cutting Laser. section, is a fabric cutting process that uses high-power laser technology that is emitted from a generator on the workpiece, the cutting movement is controlled through a computer so that the possibility of slipping is small. During the cutting laser process, workers stand in front of the cutting laser machine and bend over while setting the fabric size according to the basket. These complaints arise due to non-ergonomic work postures causing pain in some parts of the body felt by workers. The purpose of this study was to determine the level of risk and the percentage of complaints felt during cutting laser. The methods used are Rapid Entire Body Assessment (REBA) and Nordic Body Map (NBM), based on the REBA method the work risks faced by workers in cutting laser cloth with a high level of scores in the range of 8-10, high category of action so it needs to be done immediately improvement of work posture. The Nordic Body Map shows the first body segment on the back with a score of 9, the second body segment on the right shoulder with a score of 8, the third body segment on the waist with a score of 8, the fourth body segment on the buttocks with a score of 8, and the fifth body segment on the legs. right with a score of 8, due to a bent work posture during the cutting laser process and fabric size settings as well as age and length of work factors that also affect the questionnaire. Kegiatan fisik yang berhubungan dengan aktivitas kerja pada operator produksi merupakan salah satu pekerjaan perlu diperhatikan. Aktifitas operator pada CV. Primavera yang bergerak di bidang garment terutama bagian cutting laser kain adalah proses pemotongan kain yang menggunakan teknologi sinar laser berdaya tinggi yang dipancarkan dari generator mengenai benda kerja, pergerakan pemotongan dikontrol melalui komputer sehingga kemungkinan melesetnya kecil. Pada saat proses cutting laser, pekerja berdiri didepan mesin cutting laser dan membungkuk saat penyetingan ukuran kain sesuai keranjang. Keluhan tersebut muncul disebabkan postur tubuh kerja yang tidak ergonomi menyebabkan timbulnya rasa sakit pada beberapa bagian tubuh yang dirasakan pekerja. Tujuan dari penelitian ini adalah untuk mengetahui tingkat resiko dan persentase keluhan yang dirasakan selama cutting laser. Metode yang digunakan adalah Rapid Entire Body Assessment (REBA) dan Nordic Body Map (NBM), berdasarkan metode REBA resiko kerja yang di hadapi pekerja dalam cutting laser kain dengan level tinggi skor yang dihadapi dikisaran 8-10, kategori tindakan tinggi sehingga perlu segera dilakukan perbaikan postur kerja. Nordic Body Map menunjukan segmen tubuh yang pertama pada bagian punggung dengan skor 9, segmen tubuh kedua pada bagian kanan bahu dengan skor 8, segmen tubuh ketiga bagian pinggang skor 8, segmen tubuh keempat pada bagian pantat skor 8, dan segmen tubuh kelima pada bagian kaki kanan dengan skor 8, disebabkan postur kerja yang membungkuk saat proses cutting laser dan penyetingan ukuran kain serta faktor umur dan lama bekerja ikut mempengaruhi kuesioner. Indonesian Society of Applied Science 2021-08-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/217 10.52158/jamere.v1i2.217 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 1 No. 2: August 2021; 30-35 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 1 No 2: August 2021; 30-35 2775-1031 10.52158/jamere.v1i2 ind https://journal.isas.or.id/index.php/JAMERE/article/view/217/74 Copyright (c) 2021 Darsini, Reza Tania Achmadi

oai:ojs2.journal.isas.or.id:article/222 2023-05-20T05:27:34Z JAMERE:ART driver

Analisis Performansi Pompa Offloading 50-PA-4501A pada Anjungan Main Stupa Saksono, Puji Nurdin, Akhmad Aditya, Gilang Saksono, Puji Nurdin, Akhmad Aditya, Gilang Centrifugal pump Opening discharge valve Performance Pompa sentrifugal Bukaan katup ke luar Performansi The activities of gas well exploitation have some problems. One of the problems is the amount of liquid (water) in the tubing column which obstructing the gas production. One of the ways to overcome the problem is to offload activity. One of the important equipment during offload activities is the offloading pump. An offloading pump is used to transfer liquid (water) from the well that has been collected in a vessel to the trunkline. This study aims to see the changes in the performance of the offloading pump between the initial conditions according to the manufacturer's specifications and the current condition after being used for ± 9 years. The type of pump being tested is a multi-stage centrifugal pump model 20 WUC-2R-19. The performance testing of offload pump is done by varying the discharge valve opening by 25%, 50%, 75%, and 100%. After that, compare the actual pump performance with the corrected data using the affinity law. The test performed during the offload process occur, and the fluid characteristics assume to be constant. The results showed that there was a decrease in performance between the initial operating conditions in 2011 with the actual conditions in 2020. The actual capacity of the pump decreased from 24 m3/h to be 23.45 m3/h. The efficiency of the offload pump decreased from the initial condition of 80% to 7.71%. The decrease in efficiency for 9 years is 2.29% or 0.25% per year. Kegiatan eksploitasi sumur gas memiliki berbagi masalah salah satunya banyaknya cairan pada column tubing yang menghambat produksi gas. Salah satu cara mengatasi hal tersebut adalah dengan proses offload. Peralatan yang penting untuk kegiatan offload adalah pompa offload. Pompa ini digunakan untuk memindahkan cairan yang telah ditampung di vessel ke trunkline. Unjuk kerja pompa offload dalam memtransfer cairan merupkan hal yang sangat penting. Penelitian ini bertujuan melihat perubahan unjuk kerja pompa offloading antara kondisi awal sesuai spesifikasi pabrik dengan saat ini setelah dipakai selama ± 9 tahun. Jenis pompa yang diuji adalah pompa multistage sentrifugal model 20 WUC-2R-19. Pengujian performansi pompa offload dilakukan dengan menvariasikan bukaan katup discharge sebesar 25%, 50%, 75% dan 100%. Kemudian membandingkan performansi pompa aktual dengan data terkoreksi menggunakan hukum affinity law. Pengujian ini tidak memperhitungkan perubahan karakteristik cairan yang terjadi saat kegiatan offload. Hasil penelitian menunjukan telah terjadi penurunan performansi antara kondisi awal operasi tahun 2011 dengan kondisi aktual tahun 2020. Kapasitas aktual pompa turun menjadi sebesar 23,45 m3/h dibandingkan kapasitas disain sebesar 24 m3/h. Efisiensi pompa offload menurun dari kondisi awal sebesar 80 % menjadi 7,71%. Penurunan efisiensi selama 9 tahun adalah sebesar 2,29% atau 0,25% per tahun. Indonesian Society of Applied Science 2021-08-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/222 10.52158/jamere.v1i2.222 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 1 No. 2: August 2021; 36-41 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 1 No 2: August 2021; 36-41 2775-1031 10.52158/jamere.v1i2 ind https://journal.isas.or.id/index.php/JAMERE/article/view/222/75 Copyright (c) 2021 Puji Saksono, Akhmad Nurdin, Gilang Aditya

oai:ojs2.journal.isas.or.id:article/223 2023-05-20T05:28:33Z JAMERE:ART driver

Pengaruh Waktu Perendaman Serat dalam Larutan Alkali terhadap Kekuatan Impak Komposit Serat Tebu Maryanti, Budha Sidabutar, Sadat N.S. Suwandy Maryanti, Budha Sidabutar, Sadat N.S. Suwandy Alkaline Energy Immersion Impact Sugarcane Alkali Energi Impak Perendaman Serat Tebu Bagasse fiber is an organic waste that is produced in many sugarcane processing factories in Indonesia. This fiber is also easy to obtain, cheap, does not endanger health and can also be degraded naturally. This research aims to determine the impact strength of the bagasse fiber treated with alkaline. The variables of this study are the immersion time of 1 hour, 2 hours, and 3 hours. The fiber used is sugarcane fiber and the volume fraction ratio of resin and catalyst 65% (2% catalyst) and 35% sugarcane fiber. Impact test is carried out according to the impact testing standard ASTM D 5942-96, by using the Charpy method. The result shows that among the three specimens tested, 1 hour immersed specimen has the greatest energy absorption with impact value of 0.5374 Joules/mm2. The longer the immersion time of bagasse fibers in the alkaline solution, the less energy absorbed. It also shows that the resin mixed with alkaline treated fibers has higher impact value than pure resin. Serat ampas tebu merupakan limbah organik yang banyak di hasilkan di pabrik-pabrik pengolahan tebu di Indonesia. Serat ini juga mudah didapat, murah, tidak membahayakan kesehatan dan juga dapat terdegradasi secara alami. Penelitian material serat ampas tebu ini bertujuan yaitu untuk mengetahui dan dapat menjelaskan bagaimana hasil kekuatan impak dari serat ampas tebu yang mendapat perlakuan dengan variasi waktu perendaman alkali 1jam, 2jam, 3jam. Variabel penelitian ini meliputi lama perendaman 1 jam, 2 jam, 3 jam, serat yang di gunakan serat tebu dan perbandingan fraksi volum resin dan katalis 65% (2% katalis) dan serat tebu 35%. Spesimen yang digunakan sesuai standar pengujian impak ASTM D 5942-96, dengan metode Charpy. Pada penelitian ini dapat disimpulkan  bahwa dari tiga spesimen yang diuji diperoleh spesimen satu (1 jam) mempunyai energi serap terbesar dengan harga impak 0,5374 Joule/mm2. Semakin lama perendaman serat ampas tebu kedalam larutan alkali maka energi terserap semakin kecil. Dari hasil perbandingan didapatkan bahwa resin dengan campuran serat yang sudah melalui perendaman alkali mendapatkan nilai impak yang lebih tinggi dibandingkan dengan resin tanpa menggunakan serat. Indonesian Society of Applied Science 2021-08-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/223 10.52158/jamere.v1i2.223 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 1 No. 2: August 2021; 42-45 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 1 No 2: August 2021; 42-45 2775-1031 10.52158/jamere.v1i2 ind https://journal.isas.or.id/index.php/JAMERE/article/view/223/76 Copyright (c) 2021 Budha Maryanti, Sadat N.S. Sidabutar, Suwandy

oai:ojs2.journal.isas.or.id:article/235 2023-05-11T05:19:19Z JAMERE:ART driver

Perancangan dan Analisis Potensi Pembangkit Listrik Tenaga Mikro Hidro Di Aliran Sungai Brantas Sengkaling Kabupaten Malang Dalam Rangka Mencapai Target Energy Mix 23% Pada Tahun 2025 Muhammad Helmi Kurniawan Iswanda, Dovian Annisa Kesy Garside Muhammad Helmi Kurniawan Iswanda, Dovian Annisa Kesy Garside Micro-hydropower Efficiency Specific speed Electric power Microhydro Efisiensi Kecepatan spesifik Daya turbin A micro-hydropower plant is a small-scale power plant that uses water as its propulsion and the prime mover is a turbine. This generating system is very appropriate to be used in rural areas because this system is easy to manufacture, produces a large amount of electrical power, and is relatively inexpensive to manufacture. Based on the above, it is necessary to design a turbine that supports this generating system, including the Cross-Flow Turbine. To design a water turbine so that there are no errors in the design (such as the cost of making it), then a design is carried out. A cross-flow turbine design is designed with a flow rate (Q) = 1.2 m3/s, head (H) = 17 m with an efficiency of 0.75. The main technical specifications from the results of the turbine design are runner diameter (D) = 510 mm, turbine shaft rotation 471 rpm with a specific speed of 61.33 rpm, water power of 200,124 kW, and producing electric power of 100.86kW. Pembangkit listrik tenaga mikrohidro merupakan pembangkit listrik skala kecil yang menggunakan air sebagai penggeraknya dan penggerak mula adalah turbin. Sistem pembangkit ini sangat tepat digunakan di pedesaan karena sistem ini mudah dibuat, menghasilkan daya listrik yang cukup besar dan biaya pembuatan yang lebih relatif murah. Atas dasar diatas maka perlu dirancang suatu turbin yang mendukung sistem pembangkit ini, diantaranya adalah Turbin Aliran Silang. Untuk merancang sebuah turbin air agar tidak terjadi kesalahan dalam perancangan (seperti hal-nya biaya pembuatannya) maka dilakukan perancangan desain. Sebuah perancangan desain Turbin Aliran Silang dirancang  dengan debit (Q) = 1.2 m3/s, head (H) = 17 m dengan efisiensi 0,75. Spesifikasi teknik utama dari hasil perancangan turbin adalah diameter runner (D) = 510 mm,putaran poros turbin 471 rpm dengan kecepatan spesifik 61.33 rpm daya air 200.124 kW dan memproduksi daya listrik sebesar 100.86kW. Indonesian Society of Applied Science 2021-08-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/235 10.52158/jamere.v1i2.235 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 1 No. 2: August 2021; 46-52 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 1 No 2: August 2021; 46-52 2775-1031 10.52158/jamere.v1i2 ind https://journal.isas.or.id/index.php/JAMERE/article/view/235/77 Copyright (c) 2021 Muhammad Helmi Kurniawan, Dovian Iswanda, Annisa Kesy Garside

oai:ojs2.journal.isas.or.id:article/243 2023-05-20T05:30:55Z JAMERE:ART driver

Perancangan Aktivitas Pemeliharaan dengan Metode Reliability pada Sistem Main Rotor Blade Helikopter BELL 412EP Studi Kasus Penerbad Semarang Perancangan Aktivitas Pemeliharaan dengan Metode Reliability pada Sistem Main Rotor Blade Helikopter BELL 412EP Studi Kasus Penerbad Semarang Rahmanto, Bayu Setiawan, Ferry Sofyan, Edi Rahmanto, Bayu Setiawan, Ferry Sofyan, Edi Main rotor blade system Reliability FMEA Maintenance Sistem main rotor blade Keandalan FMEA Maintenance BENGPUSPENERBAD is a central workshop specifically owned by the Indonesian Army in Semarang, where aircraft and helicopters are subject to preventive and corrective maintenance. During the period 2018-2020 the BELL 412 EP helicopters often experienced unscheduled maintenance which resulted in losses resulting in flight failure, this was due to a malfunction in the Main Rotor Blade system. The malfunction of the Main Rotor Blade system is dominated by the hub component, namely on the shaft associated with Crack, Noise and Burn damage, and blade components, namely Corrosions, Nicks, Scratches, Dents, Deformation Holes and Crack. Therefore, the aim of this study is to eliminate failure system and unscheduled maintenance. To eliminate failure and unscheduled maintenance, the authors perform an analysis with the FMEA method and calculate using the distribution method, then design the appropriate activities on the system. The data used for analysis are qualitative and quantitative data, where the authors use data from Time To Failure (TTF) and Time To Repair (TTR). According to calculations using the current distribution we found that the Main Rotor Blade system was on time during the 200 operational flight hours, for which the reliability figure was 0.70. Maintenance activities in accordance with the operational conditions of the main rotor blade operating system are preventive maintenance with activities for tool preparation, inspection or chek, dismantling and servicing, and finally installation and finishing activities. Indonesian Society of Applied Science 2022-02-28 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/243 10.52158/jamere.v2i1.243 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 2 No. 1: February 2022; 9 - 15 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 2 No 1: Februari 2022; 9 - 15 2775-1031 10.52158/jamere.v2i1 ind https://journal.isas.or.id/index.php/JAMERE/article/view/243/105 Copyright (c) 2022 Bayu Rahmanto, Ferry Setiawan, Edi Sofyan

oai:ojs2.journal.isas.or.id:article/246 2023-05-29T09:46:26Z JAMERE:ART driver

Perencanaan Preventive Maintenance Ram Air Actuator pada Pesawat Boeing 737 Next Generation Menggunakan Metode Reliability Di PT. GMF Aeroasia Perencanaan Preventive Maintenance Ram Air Actuator pada Pesawat Boeing 737 Next Generation Menggunakan Metode Reliability Di PT. GMF Aeroasia Setiawan, Ferry Sofyan, Edi Hadi, Mirhan Setiawan, Ferry Sofyan, Edi Hadi, Mirhan Reliability FMEA Preventive maintenance Failure Weibull distribution Kehandalan FMEA Preventive maintenance Kegagalan Ditribusi weibull The purpose of this study is to plan effective preventive maintenance activities so as to ensure the reliability of the system, so that it can operate without experiencing component damage components that cause system failure. The working system of the part number 541674-4 Ram Air Actuator of The Boeing 737 NG aircraft is often damaged, resulting in failure of the operational system, the cause of operational system failure is damage to the Wear and Bearing Damage component, Housing assembly, Bearing Damge problem, Wear Damage, Electrical Problem Stuck. These problems encourage research to overcome the damage and failure on the Ram Air Actuator system of the Boeing 737 NG. The study was carried out using qualitative analysis and quantitative analysis, qualitative analysis was carried out using the FMEA (failure mode effect analysis) method to identify and identify the cause of failure in the Ram Air Actuator system, quantitative analysis was carried out by calculating reliability using the Weibull distribution so that the life time limit was known. Critical part or Ram Air Actuator component. Based on the results of the reliability analysis, the operational time limit value is obtained, where the system will experience a critical period when it reaches operational time, namely Mechanical system = 1680 hours with a reliability value of 72%, Electrical system = 3401 hours with a reliability value of 72%, Pneumatic system = 3201 hours with a value of reliability 70%. After knowing the critical life time limit, preventive maintenance plans will be carried out on the parts and components that cause failure so that the Ram Air Actuator system failure of the Boeing 737 NG aircraft will not occur. Tujuan penelitian ini adalah untuk merencanakan aktifitas preventive maintenanance yang efektif sehingga dapat menjamin kehandalan sistem, agar dapat beroperai tanpa mengalami kerusakan komponen yang menyebabkan kegagalan sistem. Sistem kerja Ram Air Actuator Part Number 541674-4 pesawat Boeing 737 NG sering mengalami kerusakan sehingga mengakibatkan kegagalan pada operasional sistem, penyebab kegagalan sistem operasional adalah Kerusakan pada komponen wear and bearing damage, housing assembly, problem bearing damge, wear damage, electrical problem stuck. Permasalah tesebut mendorong dilakukannya penelitian untuk menanggulagi kerusakan dan kegagalan pada sistem Ram Air Actuator pesawat boeing 737 NG. Penelitian dilaksanakan dengan analisis kualitatif dan analisis kuantitatif, analisis kualitatif yang dilaksankan dengan menggunakan metode FMEA (failure mode effect analysis) untuk mengetahui dan mengidentifikasi penyebab kegagalan pada sistem Ram Air Actuator, analisis kuantitatif dilaksanakan dengan perhitungan reliability menggunakan distribusi weibull sehingga di ketahui batas critical life time part atau komponen Ram Air Actuator. Berdasarkan hasil analisis reliability didapatkan nilai batas waktu operasional, dimana sistem akan mengalami masa kritis ketika mencapai waktu operasional yaitu Mechanical system = 1680 jam dengan nilai reliability 72%, Electrical system = 3401 jam dengan nilai reliability 72%, Pneumatik system = 3201 jam dengan nilai reliability 70%. Setelah mengetahui batas masa kritis komponen (critical life time), maka akan dilakukan perencanaan preventive maintenance terhadap part dan komponen penyebab kegagalan sehingga tidak terjadi lagi kegegalan sistem Ram Air Actuator pesawat boeing 737 NG. Indonesian Society of Applied Science 2021-08-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/246 10.52158/jamere.v1i2.246 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 1 No. 2: August 2021; 53-62 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 1 No 2: August 2021; 53-62 2775-1031 10.52158/jamere.v1i2 ind https://journal.isas.or.id/index.php/JAMERE/article/view/246/104 Copyright (c) 2021 Ferry Setiawan, Edi Sofyan, Mirhan Hadi

oai:ojs2.journal.isas.or.id:article/286 2023-05-11T05:18:29Z JAMERE:ART driver

Analysis of Work Posture Using the Rapid Entire Body Assessment (REBA) Method for Making Buis Beton Analisis Postur Kerja Menggunakan Metode Rapid Entire Body Assesment (REBA) Proses Pembuatan Buis Beton Darsini Reza Tania Achmadi Mathilda Sri Lestari Darsini Reza Tania Achmadi Mathilda Sri Lestari Keywords: Concrete buis making, Work posture, NBM, REBA Kata Kunci: Pembuatan buis beton, Postur kerja, NBM, REBA There are quite a number of entrepreneurs making precast concrete in Polokarto sub-district, the community works as precast concrete making workers as their life support. The resulting production is in the form of Buis Concrete/Concrete Pipes. The process of making concrete buis, among others: the process of selecting materials, mixing process, lifting process, printing process, drying process. Activities carried out during the production process are carried out repeatedly, causing complaints to workers. These complaints arise due to non-ergonomic body postures causing pain in some parts of the body felt by workers. This study aims to determine the level of risk and the percentage of complaints felt during the process of making concrete buis. The methods used are Nordic Body Map (NBM), and Rapid Entire Body Assessment (REBA). The results of the research from the NBM questionnaire on the manufacture of concrete buis segemn workers' bodies experience complaints are the waist, back, right shoulder, right upper arm and right hand. Research using the REBA method has a risk level ranging from 7-10 so it includes a moderate to high level of risk that requires work posture action. Keywords: Concrete buis making, Work posture, NBM, REBA Pengusaha pembuatan beton pracetak di kecamatan polokarto sudah terbilang cukup banyak, masyarakat berprofesi sebagai pekerja pembuatan beton pracetak sebagai penopang kehidupan mereka. Hasil produksi yang dihasilkan berupa produk  Buis beton/Pipa Beton. Proses pembuatan buis beton antara lain: proses pemilihan bahan, proses pencampuran, proses pengangkatan, proses percetakan, proses pengeringan. Aktivitas yang dilakukan selama proses produksi dilakukan secara berulang-ulang sehingga menimbulkan keluhan pada pekerja. Keluhan tersebut muncul disebabkan postur tubuh yang tidak ergonomi menyebabkan timbulnya rasa sakit pada beberapa bagian tubuh yang dirasakan pekerja. Penelitian ini bertujuan untuk mengetahui tingkat resiko dan presentase keluhan yang dirasakan selama proses pembuatan buis beton. Metode yang digunakan adalah Nordic Body Map (NBM), dan Rapid Entire Body Assessment (REBA). Hasil penelitian dari kuesioner NBM pada pembuatan buis beton segemn tubuh pekerja mengaalami keluhan adalah bagian pinggang, punggung, bahu kanan, lengan atas kanan dan tangan kanan.Sehingga dapat dinyatakan adanya pengaruh beban kerja terhadap pekerja terhadap keluhan musculosketal disorders. Penelitian menggunakan metode REBA memiliki tingkat level resiko kisaran angka 7-10 sehingga termasuk level resiko sedang sampai tinggi perlu tindakan postur kerja. Kata Kunci: Pembuatan buis beton, Postur kerja, NBM, REBA Indonesian Society of Applied Science 2022-03-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/286 10.52158/jamere.v2i1.286 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 2 No. 1: February 2022; 30 - 35 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 2 No 1: Februari 2022; 30 - 35 2775-1031 10.52158/jamere.v2i1 ind https://journal.isas.or.id/index.php/JAMERE/article/view/286/111 Copyright (c) 2022 Darsini, Reza Tania Achmadi, Mathilda Sri Lestari

oai:ojs2.journal.isas.or.id:article/288 2023-05-11T05:18:29Z JAMERE:ART driver

Analisis Beban Kerja Mental pada Operator Dump Truck dengan Metode Nasa-TLX Analisis Beban Kerja Mental pada Operator Dump Truck dengan Metode Nasa-TLX Muh Anhar Darsini Muhadi Muh Anhar Darsini Muhadi Mental workload, Dump truck operators, NASA-TLX Beban kerja mental, Operator dump truck, NASA-TLX Human Resources (HR) are workers, employees, or laborers working at a company. HR is one of the vital aspects of a company to increase the effectiveness and efficiency of a company. PT. Saptaindra Sejati (PT. SIS) is a coal mining company located in Kalimantan. Operators are parts of company human resources who have important roles in the production. Fatigue can cause excessive mental workload and decline productivity. This study focuses on the mental workload of dump truck operators. It aims to identify the mental workload level of dump truck operators using the NASA-TLX method. The result indicated that the mental workload level indicator is in the high category. The highest indicator is Frustration Level (FR) with a value of 24%, followed by Mental Demand (MD) and Effort (EF) (17%), Own Performance (OP) (16%), and Physical Demand (PD) and Temporal Demand (PD) (13%). Sumber Daya Manusia (SDM) merupakan tenaga kerja, karyawan, buruh atau pegawai yang bekerja pada sebuah perusahaan. SDM adalah salah satu aspek penting untuk meningkatkan efektivitas dan efisien sebuah perusahaan. PT. Saptaindra Sejati (PT. SIS) merupakan sebuah perusahaan pertambangan batu bara di Kalimantan. Operator merupakan salah satu bagian dalam perusahaan, sehingga memiliki peranan penting untuk produksi. Kelelahan pada operator akan menimbulkan efek beban mental yang berlebih, sehingga menurunkan angka produktif. Penelitian ini membahas tentang analisa beban kerja mental pada operator dump truck. Untuk mengetahui tingkat beban mental operator dump truck, peneliti menggunakan metode NASA-TLX. Dengan metode NASA-TLX akan tingkatan besaran beban mental kerja operator. Hasil penelitian ini menunjukkan tingkat indikator beban kerja metal operator masuk kategori tinggi. Indikator yang tertinggi adalah Frustation Level (FR) dengan nilai 24%, tertinggi kedua Mental Demand (MD) dan Effort (EF) dengan nilai keduanya 17%, selanjutnya Own Performance (OP) 16%, dan yang paling rendah adalah Physical Demand (PD) dan Temporal Demand (PD) dengan nilai keduanya 13%.   Indonesian Society of Applied Science 2022-03-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/288 10.52158/jamere.v2i1.288 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 2 No. 1: February 2022; 25 - 29 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 2 No 1: Februari 2022; 25 - 29 2775-1031 10.52158/jamere.v2i1 ind https://journal.isas.or.id/index.php/JAMERE/article/view/288/112 Copyright (c) 2022 Muh Anhar, Darsini, Muhadi

oai:ojs2.journal.isas.or.id:article/292 2023-05-11T05:18:29Z JAMERE:ART driver

Penggunaan Katalis Kalsium Karbonat Pada Karburasi Padat Baja ST 37 Penggunaan Katalis Kalsium Karbonat Pada Karburasi Padat Baja ST 37 Muh Anhar Sartika Muh Anhar Sartika Heat treatment, solid carburizing, steel ST 37 Heat treatment, solid carburizing, steel ST 37 Era yang serba modern saat ini, sangat banyak kita jumpai peralatan yang menggunakan logam sebagai bahan utama pembuatannya. Penggunaan logam yang memiliki kekerasan baik, sangat diperlukan terutama pada bagian mesin yang harus selalu bersinggungan dengan bagian mesin lainnya. Salah satu cara untuk menaikan kekekerasan logam adalah dengan melakukan penambahan karbon pada logam tersebut. Proses penambahan karbon adalah dengan cara karburasi padat. Penggunaan katalis kalsium karbonat juga dapat digunakan untuk mempercepat terjadinya reaksi pada karburasi padat tersebut. Penelitian ini bertujuan untuk mengetahui pengaruh proses karburasi pada baja ST 37 baik itu dengan menggunakan katalis maupun tanpa katalis terhadap uji kekerasan. Dari hasil pengamatan dan pengumpulan data yang telah dilakukan maka didapatlah nilai kekerasan rata - rata raw material adalah sebesar 47,9 HRB. Untuk baja ST 37 yang dilakukan proses heat treatment dengan temperature 900ºC dilakukan proses normalizing dan proses quenching masing – masing memiliki nilai kekerasan rata – rata sebesar 47,5 HRB dan 49,05 HRB. Serta baja ST 37 yang dilakukan proses karburasi padat dengan menggunakan katalis dan tanpa katalis masing – masing memiliki angka kekerasan sebesar 48,6 HRB dan 48,2 HRB. Dari hasil tersebut diatas maka diketahui bahwasannya lama waktu pendinginan berpengaruh terhadap kekerasan baja ST 37. Proses karburasi dapat meningkatkan kekerasan dikarenakan terjadinya penambahan karbon pada baja. Katalis berperan dalam peningkatan kekerasan baja, hal ini karena katalis dapat mempercepat laju reaksi pada karburasi In modern era, we find many equipment that uses metal as the main ingredient in its manufacture. The use of metals that have good hardness is very necessary, especially in the engine parts which must always be in contact with other engine parts. One way to increase metal hardness is to add carbon to the metal. The process of adding carbon is by solid carburizing. The use of calcium carbonate catalyst can also be used to accelerate the reaction of the solid carburizing. This study aims to determine the effect of the carburizing process on ST 37 steel either by using a catalyst or without a catalyst to the hardness test. From the results of observations and data collection that has been done, the average hardness value of raw material is 47.9 HRB. For ST 37 steels which are heat treated at 900ºC, normalizing process and quenching process have an average hardness value of 47.5 HRB and 49.05 HRB. As well as ST 37 steel which is carried out by a solid carburizing process using catalysts and without catalyst, each has a hardness rate of 48.6 HRB and 48.2 HRB. From the results above it is known that the cooling time affects the hardness of steel ST 37. The carburizing process can increase the hardness due to the addition of carbon to the steel. Catalysts play a role in increasing the hardness of steel, this is because the catalyst can accelerate the rate of reaction in carburizing Indonesian Society of Applied Science 2022-02-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/292 10.52158/jamere.v2i1.292 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 2 No. 1: February 2022; 1 - 8 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 2 No 1: Februari 2022; 1 - 8 2775-1031 10.52158/jamere.v2i1 ind https://journal.isas.or.id/index.php/JAMERE/article/view/292/102 Copyright (c) 2022 Muh Anhar, Sartika,Frengki Ade Putra

oai:ojs2.journal.isas.or.id:article/293 2023-05-11T05:18:29Z JAMERE:ART driver

Evaluasi Produksi Alat Mekanis pada Unit Crushing Plant di PT TOP Kabupaten Mempawah Kalimantan Barat Evaluasi Produksi Alat Mekanis pada Unit Crushing Plant di PT TOP Kabupaten Mempawah Kalimantan Barat Firman Firman Production, performance, crushing plant, and belt conveyor. Produksi, kinerja, crushing plant, dan belt conveyor. TOP is a mining company in granodiorite located in Mempawah Regency with a production target of 150 tons per day. Mining activities are carried out by blasting which are transported using a Dump Truck to be sent to the Crushing Plant unit to be processed according to size. The processing of granodiorite in the Crushing Plant unit consists of two stages, namely Primary crushing and Secondary crushing. The tools used are 1 unit of primary crushing (Jaw Crusher) and 1 unit of Secondary crushing (Cone Crusher). The use of crushing equipment is supported by equipment such as hoppers, feeders, screening and belt conveyors. This series of processing produces production in the form of stone ash, 1x1 mm, 1x2 mm, and 0.5 mm. The purpose of this activity is to evaluate the achievement of granodiorite production targets at PT. TOP and knowing the factors that hinder the performance of the crushing plant tool. The results of the evaluation of production on belt conveyors 11,12,13, and 14 are in accordance with the production target at PT. TOP, but the production target is not optimal. For this reason, the company can increase production targets without add a belt conveyor to the Crushing Plant unit. while the factors that hinder the performance of the crushing plant are the slow handling of the damaged crushing plant machine, the material size is too large. TOP merupakan perusahaan yang bergerak dibidang pertambangan batu granodiorit yang berlokasi di Kabupaten Mempawah dengan target produksi 150 ton/hari. Aktivitas penambangan yang dilakukan dengan cara peledakan yang kemudian diangkut menggunakan Dump Truck untuk dikirim ke unit Crushing plant agar diproses sesuai ukuran. Pengolahan granodiorit di unit Crushing plant terdiri dari dua tahap yaitu Primary crushing dan Secondary crushing. Alat yang digunakan yaitu 1 unit primary crushing (Jaw Crusher) dan 1 unit Secondary crushing (Cone Crusher). Penggunaan alat Crushing tersebut didukung oleh alat penunjang seperti Hopper, feeder, screening dan belt conveyor. Rangkaian pengolahan tersebut menghasilkan produksi berupa abu batu, 1x1 mm, 1x2 mm, dan 0,5 mm. Adapun tujuan dari kegiatan ini adalah mengevaluasi ketercapaian target produksi granodiorit di PT. TOP dan mengetahui faktor-faktor yang menghambat kinerja alat crushing plant..Hasil evaluasi produksi pada belt conveyor 11,12,13, dan 14 telah sesuai dengan target produksi di PT. TOP, namun target produksi tersebut belum optimal. Untuk itu perusahaan dapat meningkatkan target produksi tanpa perlu menambah alat belt conveyor pada unit Crushing plant. sedangkan faktor yang menghambat kinerja crushing plant adalah lambatnya penanganan terhadap mesin crushing plant yang rusak, ukuran material terlalu besar. Indonesian Society of Applied Science 2022-02-28 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/293 10.52158/jamere.v2i1.293 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 2 No. 1: February 2022; 21 - 24 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 2 No 1: Februari 2022; 21 - 24 2775-1031 10.52158/jamere.v2i1 ind https://journal.isas.or.id/index.php/JAMERE/article/view/293/107 Copyright (c) 2022 Firman

oai:ojs2.journal.isas.or.id:article/294 2023-05-11T05:18:29Z JAMERE:ART driver

Evaluasi Kinerja Dump Truck di PT HPMU Kabupaten Ketapang Evaluasi Kinerja Dump Truck di PT HPMU Kabupaten Ketapang Sartika Sartika Evaluation, performance, and dump truck. Evaluasi, kinerja, dan dump truck. HPMU is a mining company and is located in Ketapang Regency, West Kalimantan Province. PT. HPMU has a production target of 360,000 tons/month. The realization of production sometimes does not reach the production target per month due to various factors including weather, availability of tools, use of tools, labor, and so on. This can be monitored in the mine control room, which is tasked with monitoring activities such as reporting ritase, ore mining, weighing, MGB hauling, reporting hours for repairs, reporting for fule filling, and reporting hours meter (HM). The monitoring results are used as a control and reference to analyze the level of production in the field so that if a problem occurs in production activities, it can be addressed immediately. This study aims to evaluate the performance using monitoring data from the mine control room. The calculation of the performance of the Hino type dump truck using data working hours, standby units, and repair hours. The performance evaluation of the means of transportation shows that dump truck (DT) with number 62 has the best performance among 5 dump truck units, with percentage values ​​of mechanical of availability (MA), physical of availability (PA), use of availability (UA) and effective of utilization (EU) 88%, 91%, 75% and 65% respectively. While the DT 65 has the worst performance among 5 dump truck units with MA, PA, UA and EU 59% values, respectively 72%, 77%, 76% and 59%. HPMU merupakan perusahaan yang bergerak dibidang pertambangan dan terletak di Kabupaten Ketapang, Provinsi Kalimantan Barat. PT. HPMU memiliki target produksi sebesar 360.000 ton/bulan. Realisasi produksi terkadang tidak mencapai target produksi per bulan yang disebabkan oleh berbagai faktor diantarannya cuaca, ketersediaan alat, penggunaan alat, tenaga kerja, dan sebagainya. Hal tersebut dapat dipantau pada bagian mine control room yang bertugas untuk melakukan pemantauan pada kegiatan seperti pelaporan ritase, ore mining, penimbangan, MGB hauling, pelaporan unit jam perbaikan, pelaporan pengisian fule, dan pelaporan hours meter (HM)working hours, standby unit, dan jam perbaikan. Evaluasi kinerja alat angkut menunjukkan dump truck (DT) dengan nomor 62 memiliki kinerja yang paling baik diantara 5 unit dump truck, dengan nilai persentase mechanical of availability (MA), physical of availability (PA), use of availability (UA) dan efective of utilization (EU) secara berurutan 88%, 91%, 75% dan 65%. Sedangkan DT 65 memiliki kinerja paling buruk diantara 5 unit dump truck dengan nilai MA, PA , UA dan EU 59% secara berurutan 72%, 77%, 76% dan 59%. Indonesian Society of Applied Science 2022-02-28 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/294 10.52158/jamere.v2i1.294 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 2 No. 1: February 2022; 16 - 20 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 2 No 1: Februari 2022; 16 - 20 2775-1031 10.52158/jamere.v2i1 ind https://journal.isas.or.id/index.php/JAMERE/article/view/294/106 Copyright (c) 2022 Sartika

oai:ojs2.journal.isas.or.id:article/359 2023-05-11T05:19:37Z JAMERE:ART driver

EFFECT OF IMMERSING NACL AND NAOH ON THE MANUFACTURE OF ARECA FIBER COMPOSITES WITH THE VACCUM BAGGING METHOD PENGARUH PERENDAMAN NACL DAN NAOH PADA PEMBUATAN KOMPOSIT SERAT PINANG DENGAN METODE VACCUM BAGGING septio Novanto Sehono Ferry Setiawan septio Novanto Sehono Ferry Setiawan Composite, areca fiber, vacuum bagging Komposit, serat pinang, vaccum bagging Composites are widely used in household appliances, as well as in the industrial sector. This is because composites have several advantages such as composite materials are stronger, more flexible and also resistant to corrosion. At this time betel nut is already used in the medical and cosmetic fields. However, the consequences of this processing still leave waste in the form of betel nut fiber. Such potential can be used as fibers in the manufacture of composites. The manufacture of composites this time uses lycal resin as a matrix and uses the vaccum bagging method. This study aims to determine the technical analysis and mechanical properties of making betel nut fiber composites to obtain tensile and bending strength results. The tensile test refers to ASTM D-638 and the bending test refers to ASTM D 790. In the NaCl immersion variation, the highest tensile value was obtained, namely 21.78 MPa, and in the NaOH immersion variation, the highest tensile value was obtained, which was 30.21 MPa. in the bending test the Immersion variation NaCl got the highest bending strength value with a value of 509.58 MPa and for the immersion variation NaOH got the highest bending strength value with a value of 555.82 MPa Komposit banyak digunakan dalam peralatan rumah tangga, dan juga di sektor industri. Hal ini dikarenakan komposit memiliki beberapa keunggulan seperti bahan komposit lebih kuat, lebih lentur dan juga tahan akan korosi. Pada saat ini buah pinang sudah digunakan dalam bidang medis dan kosmetik. Namun akibat dari pengolahan tersebut masih menyisakkan limbah berupa serat buah pinang. Potensi tersebut dapat digunakan sebagai serat dalam pembuatan komposit. Pembuatan komposit kali ini menggunakan resin lycal sebagai matrik dan menggunakan metode vaccum bagging. Penelitian ini bertujuan untuk mengetahui Analisa teknis serta sifat mekanis dari pembuatan komposit serat pinang untuk mendapatkan hasil kekuatan tarik dan bending. Pada pengujian tarik mengacu pada ASTM D-638 dan pengujian bending mengacu pada ASTM D 790. Pada variasi perendaman NaCl didapat nilai tensile tertinggi yaitu 21,78 MPa dan pada variasi perendaman NaOH didapat nilai tensile tertinggi yaitu 30,21 MPa. Pada pengujian bending variasi perendaman NaCl mendapat nilai kekuatan bending tertinggi dengan nilai 509,58 MPa dan untuk variasi perendaman NaOH mendapat nilai kekuatan bending tertinggi dengan nilai 555,82 MPa. Indonesian Society of Applied Science 2022-11-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/359 10.52158/jamere.v2i2.359 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 2 No. 2: August 2022; 47-51 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 2 No 2: August 2022; 47-51 2775-1031 10.52158/jamere.v2i2 ind https://journal.isas.or.id/index.php/JAMERE/article/view/359/143 Copyright (c) 2022 septio novanto,Sehono,Ferry Setiawan

oai:ojs2.journal.isas.or.id:article/376 2023-05-11T05:19:37Z JAMERE:ART driver

EKSPERIMEN PEMBUATAN KOMPOSIT BERBAHAN DASAR TANAMAN MENDONG MENGGUNAKAN METODE VACUUM BAGGING Diaza Erlangga Briyan Nugraha Diaza Erlangga Briyan Nugraha Ferry Setiawan Sehono komposit, vacuum bagging, serat sintetis, serat alam, tanaman mendong Kompoait merupakan sebuah teknologi matrial yang saat ini sedang berkembang, komposit sendiri merupakan gabungan dari dua atau lebih matrial yang tersusun dari penguat dan matriks. Komposit memiliki beberapa cara pembuatan salah satunya adalah vacuum bagging dimana car aini adalah salah satu cara termudah dalam pembuatan komposit, vacuum bagging menggunakan mesin vacuum untuk menciptakan daya hisap dan tekan yang nantinya berguna untuk menghilangkan gelembung gelembung udara yang ada pada proses pembuatan komposit. Dalam pembuatan komposit bahan yang digunakan biasanya matriks yang berupa resin dan katalis, dan bahan penguat yang biasanya menggunakan serat, serat sendiri terdiri dari serat buatan dan serat alam, serat yang sering digunakan dalam dunia industry adalah serat buatan seperti nylon atau fiber, dimana serat nylon atau fiber ini memiliki kekuatan dan ketahanan yang bagus, sedangkan serat alam sendiri masih dikembangkan guna untuk mengganti bahan bahan sintetis yang mempunyai dampak buruk bagi lingkungan. Mendong merupakan salah satu tanaman yang banyak tumbuh dan dibudidayakan di Indonesia, tanaman ini memiliki nama ilmiah (Fimbrystylis Globulosa), tanaman ini biasa hidup di lahan basah atau rawa rawa, tanaman ini biasanya dimanfaatkan batangnya yang nantinya dijadikan sebuah kerajinan tangan berupa topi, tas, tikar dan lain sebagainya.pada penelitian ini dilakukan eksperimen pembuatan komposit berbahan dasar tanaman mendong dan untuk mengetahui kekuatan tarik dari komposit tersebut. Hasilnya Anyaman tanaman mendong yang sudah direndam dengan NaOH ternyta mempengaruhi struktur dari tanaman dimana warna tanaman berubah menjadi lebih gelap dan memiliki tekstur yang kaku. Setelah di jadikan komposit spesimen terlihat kuat, kaku dan tidak elastis, terdapat juga beberapa lubang yang dihasilkan oleh gelembung resin yang tidak merata pada permukaan.anyaman. pada pengujian tarik dari semua sampel yang diuji memiliki kekuatan yang terbilang baik dimana rata rata kekuatan tariknya sebesar  1,44 KgF/mm2. Indonesian Society of Applied Science 2022-08-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/376 10.52158/jamere.v2i2.376 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 2 No. 2: August 2022; 36-41 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 2 No 2: August 2022; 36-41 2775-1031 10.52158/jamere.v2i2 ind https://journal.isas.or.id/index.php/JAMERE/article/view/376/140 Copyright (c) 2022 Diaza Erlangga Briyan Nugraha, Ferry Setiawan, Sehono

oai:ojs2.journal.isas.or.id:article/380 2023-05-17T11:29:30Z JAMERE:ART driver

THE EFFECT OF THE ANODE-CATHODE DISTANCE ON THE WEIGHT OF NICKEL ELECTROPLATING RESULTS ON ALUMINUM ALLOY SERIES 7075-T6 PENGARUH JARAK ANODA-KATODA TERHADAP BERAT LAPISAN HASIL ELEKTROPLATING NIKEL PADA ALUMUNIUM ALLOY SERI 7075-T6 Dedy Dwi Setiawan Ferry Setiawan Sehono Dedy Dwi Setiawan Ferry Setiawan Sehono electroplating, weight, distance, anode-cathode elektroplating, berat, jarak, anoda-katoda Electroplating serves to protect surfaces that make objects made of metal-containing materials more resistant to corrosion, make objects shiny, and make metals stronger. This research was conducted in order to determine the effect of the anode-cathode distance on the weight of the coating produced in the electroplating process. In this study, a test will be carried out using the electroplating method to determine the effect of the distance from the anode and cathode on the weight of the nickel layer coated on the 7075 aluminum alloy. of 3 grams, and the smallest result at the anode-cathode distance with a distance of 30 cm with a layer weight result of 1 gram. Based on the results of the data obtained, it can be concluded that the distance greatly affects the weight of the coating where the closer the anode-cathode distance is, the greater the layer weight, and if the anode-cathode distance is further away, the layer weight will be smaller. Elektroplating berfungsi untuk melindungi permukaan yang membuat benda-benda yang tebuat dari bahan yang mengandung bahan logam menjadi lebih tahan terhadap korosi, membuat benda menjadi lebih mengkilap, dan membuat logam menjadi lebih kuat. Penelitian ini dilakukan agar dapat mengetahui pengaruh jarak anoda-katoda terhadap berat lapisan yang dihasilkan pada proses elektroplating. Dalam penelitian ini akan dilakukan pengujian dengan metode elektroplating untuk mengatuhui pengaruh jarak dari anoda dan katoda terhadap berat hasil lapisan nikel yang di lapisi pada alumunium alloy 7075. Dimana dari penelitian yang sudah dilakuakan didapatkan hasil terbesar pada anoda-katoda dengan 10 cm didapatkan hasil berat lapisan sebesar 3 gram, dan hasil terkecil pda jarak anoda-katoda dengan jarak 30 cm dengan hasil berat lapisan sebesar 1 gram. Berdasarkan hasil data yang diperoleh didapatkan kesimpulan bahwa jarak sangat berpengaruh terhadap hasil berat lapisan dimana semakin dekat jarak anoda-katoda maka berat lapisan akan semakin besar, dan jika jarak anoda-katoda semakin jauh maka berat lapisan akan semakin kecil. Indonesian Society of Applied Science 2022-08-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/380 10.52158/jamere.v2i2.380 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 2 No. 2: August 2022; 42-46 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 2 No 2: August 2022; 42-46 2775-1031 10.52158/jamere.v2i2 ind https://journal.isas.or.id/index.php/JAMERE/article/view/380/142 Copyright (c) 2022 dedy1dwi2setiawan dedy1dwi2setiawan

oai:ojs2.journal.isas.or.id:article/399 2023-01-31T09:30:01Z JAMERE:ART driver

Uji Impact Material Komposit Campuran Serat Bambu Dan Pasir Besi Menggunakan Metode Hand Lay Up Setiawan, Ferry Pratama, Dendy Syaputra Lubis, Rio Saputra Sofyan, Edy Setiawan, Ferry Pratama, Dendy Syaputra Lubis, Rio Saputra Sofyan, Edy composite, bamboo fiber, iron sand, impact, micro photo A composite is one of the materials that is a mixture of two or more materials to form a third, more useful material. In this study, researchers chose bamboo fiber and iron sand as reinforcement for composite materials because the selection of bamboo fiber as a research material took into account the potential of bamboo fiber in Indonesia which is abundant and has not been utilized properly. The purpose of making bamboo fibrous composite materials aims to find a material that is lighter stronger and more elastic, can be developed into other products such as the manufacture of drone frames, aircraft bodies, brake pads. The method used is an experiment with making specimens using the hand lay up method and testing using impact testing and micro photo testing. Impact testing is used to determine the properties and characteristics of the material in the form of strength, hardness, and ductility of the material while for micro photos it is used to determine the bond of the material composition with the best impact test. The test standards used are ASTM D6110-10 with random fiber arrangement and ASTM D6110-04 with the arrangement of woven fibers, with variations in volume composition of bamboo fiber and iron sand particles. In the D6110-10 specimens, the best specimens were found in the variation with the most bamboo fibers, namely 35S10 P with an impact energy of 4.27 J and an impact price of 0.04 J / mm2, while the lowest variation was found in the most iron sand, namely 35P10S with an impact energy value of 2.26 J and an impact price of 0.02 J / mm2. In the D6110-04 specimen also showed the same characteristics as the ASTM D6110-10 specimen, the 30S30P variation or the composition of the most bamboo fibers had an impact energy value of 4.09 J while in the 10S10P variation it was only 1.47 J. Thus the more bamboo fibers will make the impact strength of the specimen higher. A composite is one of the materials that is a mixture of two or more materials to form a third, more useful material. In this study, researchers chose bamboo fiber and iron sand as reinforcement for composite materials because the selection of bamboo fiber as a research material took into account the potential of bamboo fiber in Indonesia which is abundant and has not been utilized properly. The purpose of making bamboo fibrous composite materials aims to find a material that is lighter stronger and more elastic, can be developed into other products such as the manufacture of drone frames, aircraft bodies, brake pads. The method used is an experiment with making specimens using the hand lay up method and testing using impact testing and micro photo testing. Impact testing is used to determine the properties and characteristics of the material in the form of strength, hardness, and ductility of the material while for micro photos it is used to determine the bond of the material composition with the best impact test. The test standards used are ASTM D6110-10 with random fiber arrangement and ASTM D6110-04 with the arrangement of woven fibers, with variations in volume composition of bamboo fiber and iron sand particles. In the D6110-10 specimens, the best specimens were found in the variation with the most bamboo fibers, namely 35S10 P with an impact energy of 4.27 J and an impact price of 0.04 J / mm2, while the lowest variation was found in the most iron sand, namely 35P10S with an impact energy value of 2.26 J and an impact price of 0.02 J / mm2. In the D6110-04 specimen also showed the same characteristics as the ASTM D6110-10 specimen, the 30S30P variation or the composition of the most bamboo fibers had an impact energy value of 4.09 J while in the 10S10P variation it was only 1.47 J. Thus the more bamboo fibers will make the impact strength of the specimen higher. Indonesian Society of Applied Science 2023-02-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/399 10.52158/jamere.v3i1.399 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 3 No. 1: February 2023; 28-33 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 3 No 1: Februari2023; 28-33 2775-1031 eng https://journal.isas.or.id/index.php/JAMERE/article/view/399/171 Copyright (c) 2023 Dendy Syaputra Pratama,Rio Saputra Lubis,Ferry Setiawan, Edy Sofyan

oai:ojs2.journal.isas.or.id:article/400 2025-03-05T05:46:52Z JAMERE:ART driver

Composite Material Impact Test With Resin Matrix And Kenaf Fiber Reinforcement Using The Hand Lay Up Method Composite Material Impact Test With Resin Matrix And Kenaf Fiber Reinforcement Using The Hand Lay Up Method Setiawan, Ferry Anhar, Muh Akmal, Akmal Wicaksono, Dhimas Setiawan, Ferry Anhar, Muh Akmal, Akmal Wicaksono, Dhimas composite, kenaf fiber, epoxy resin, hand lay-up, impact, micro photo. The purpose of this study was to obtain the results of impact testing on composite material with the arrangement of kenaf fibers in woven with volume variations of 0%, 10%, 20%, 30%, 40%, and 50%. The value obtained from impact testing with 0% fiber variation has an average energy absorption yield of 1.730623009 J and an average impact price of 0.01273547 J/mm², 10% fiber has an average absorption energy yield of 1.468150063 J and an average yield of 1.468150063 J The average impact price is 0.01080396 J/mm², 20% fiber has an average energy absorption yield of 1.730623009 J and an average impact price is 0.01273547 J/mm², 30% fiber has an average energy absorption yield of 1.214516698 J and the average yield is 1.214516698 J The average impact price is 0.008937499 J/mm², 40% fiber has an average energy absorption yield of 1.993095955 J and an average impact price is 0.01466698 J/mm², 50% fiber has an average energy absorption yield of 2.264328531 J and an average yield of 2.264328531 J Average Impact Price 0.016662952 J/mm². This composite material is made with epoxy resin as a binder and kenaf fiber as a reinforcing material. The method used is hand lay-up and specimen testing using charpy impact. After testing, a micro photo will be taken to see the best specimen fracture results. The purpose of this study was to obtain the results of impact testing on composite material with the arrangement of kenaf fibers in woven with volume variations of 0%, 10%, 20%, 30%, 40%, and 50%. The value obtained from impact testing with 0% fiber variation has an average energy absorption yield of 1.730623009 J and an average impact price of 0.01273547 J/mm², 10% fiber has an average absorption energy yield of 1.468150063 J and an average yield of 1.468150063 J The average impact price is 0.01080396 J/mm², 20% fiber has an average energy absorption yield of 1.730623009 J and an average impact price is 0.01273547 J/mm², 30% fiber has an average energy absorption yield of 1.214516698 J and the average yield is 1.214516698 J The average impact price is 0.008937499 J/mm², 40% fiber has an average energy absorption yield of 1.993095955 J and an average impact price is 0.01466698 J/mm², 50% fiber has an average energy absorption yield of 2.264328531 J and an average yield of 2.264328531 J Average Impact Price 0.016662952 J/mm². This composite material is made with epoxy resin as a binder and kenaf fiber as a reinforcing material. The method used is hand lay-up and specimen testing using charpy impact. After testing, a micro photo will be taken to see the best specimen fracture results. Indonesian Society of Applied Science 2023-02-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/400 10.52158/jamere.v3i1.400 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 3 No. 1: February 2023; 23-27 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 3 No 1: Februari2023; 23-27 2775-1031 eng https://journal.isas.or.id/index.php/JAMERE/article/view/400/170 Copyright (c) 2023 Ferry Setiawan, Akmal, Dhimas Wicaksono, Muh Anhar

oai:ojs2.journal.isas.or.id:article/408 2023-05-11T05:19:37Z JAMERE:ART driver

MIXER DESIGN EQUIPPED WITH HEATING CONTROL ELEMENTS FOR MANUFACTURING COMPOSITE MATERIALS MIXER DESIGN EQUIPPED WITH HEATING CONTROL ELEMENTS FOR MANUFACTURING COMPOSITE MATERIALS Hidayat, Rifki Erwhin Irawan Erwan Eko Prasetiyo Fery Setiawan Erwhin Irawan Erwan Eko Prasetiyo Fery Setiawan Mixer, mixing, stirring, temperature, heating element, white spot Composite is a composite material consisting of two or more materials with different mechanical properties. Composite materials are mixed to obtain new materials that have better micro-mechanical properties. To facilitate the mixing of composite materials and obtain materials that have good quality, in this study, a mixer machine design with heating elements was carried out so that the temperature could be adjusted as needed. Experiments from the results of a mixer machine with a heating element that have been made are comparing the mixing of resin and iron sand using a mixer machine without a heating element and using a heating element. The result of mixing composite materials using a mixer machine without heating elements is that the composite material is homogeneously mixed but when viewed from the micro-photos there are still many white spots so that the quality of the composite material is still not good. then the composite material is mixed and mixed using a mixer machine with a heating element, the composite material is homogeneously mixed and after seeing from the micro-photos there are a few wite spots on the composite. Indonesian Society of Applied Science 2022-08-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/408 10.52158/jamere.v2i2.408 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 2 No. 2: August 2022; 52-61 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 2 No 2: August 2022; 52-61 2775-1031 10.52158/jamere.v2i2 ind https://journal.isas.or.id/index.php/JAMERE/article/view/408/144 Copyright (c) 2022 Rifki Hidayat

oai:ojs2.journal.isas.or.id:article/430 2023-05-11T05:19:37Z JAMERE:ART driver

PENGARUH PARAMETER PENGGURDIAN TERHADAP AKURASI LUBANG KOMPOSIT GONI-POLIESTER DENGAN TWIST DRILL PENGARUH PARAMETER PENGGURDIAN TERHADAP AKURASI LUBANG KOMPOSIT GONI-POLIESTER DENGAN TWIST DRILL Radiansyah Giga Suhartono Anggit Murdani Radiansyah Giga Suhartono Anggit Murdani Composite fiber jute, drilling, twist drill, hole accurasy, polyester komposit Serat Goni, Penggurdian, Twist drill, Akurasi lubang, Poliester Composite is a combination of materials consisting of 2 or more materials lead to the composite material has different mechanical properties and characteristics as desired. Composite materials are divided into two types, synthetic fibers and natural fibers. Most of the natural fiber types use jute fiber, as it is a candidate as a reinforce material to produce lightweight, strong and environmentally friendly composite materials as mixing polyester composites. Although composites can be made according to the desired shape, the final work, such as the machining process, is also needed for making several shapes such as making holes with the drill process. Furthermore, twist drilling, can induce damage due to the imperfections of the holes that are produced, resulting asymmetrical holes. This allows complicate assembly and reduce its strength. The parameters use are spindle speed 100 rpm, 700 rpm and 1400 rpm and feeding 0,1 mm/rev, 0,2 mm/rev, 0,3 mm/rev, 0,5 mm/rev and 0,7 mm/rev. The results obtained that using 100 rpm and feeding 0.5 to 0.7 can make imprecise and resulted delamination of the hole. Increased spindle speed such as 700 and 1400 rpm and higher feed rate, resulted increase the accuracy of the hole Komposit ialah suatu gabungan material yang terdiri dari 2 material atau lebih sehingga material komposit memiliki sifat mekanik dan karakteristik yang berbeda-beda atau sesuai dengan yang diinginkan. Bahan komposit terbagi menjadi dua jenis, yaitu serat sintetis dan serat alam. Untuk jenis serat alam sebagian besar menggunakan serat goni, karena merupakan kandidat sebagai bahan penguat untuk dapat menghasilkan bahan komposit yang ringan, kuat dan ramah lingkungan sebagai campuran komposit poliester. Meskipun komposit dapat dibuat sesuai dengan bentuk yang diinginkan, akan tetapi pengerjaan akhir seperti proses pemesinan juga di perlukan untuk pembuatan beberapa bentuk seperti pembuatan lubang dengan proses gurdi (drilling). Tetapi pada proses pembuatan lubang menggunakan proses gurdi pada Twist Drill rentan terdapat kerusakan yang terjadi karena ketidaksempurnanya lubang yang dihasilkan, sehingga hasil akurasi lubang tidak simetris antara lubang yang dibuat dengan lubang yang dihasilkan. Hal ini dapat mempersulit pada waktu perakitan (assembly) dan dapat mengurangi kekuatan komposit. Sehingga parameter yang digunakan adalah kecepatan spindle dengan variabel 100 rpm, 700 rpm dan 1400 rpm dan feeding 0,1 mm/rev, 0,2 mm/rev, 0,3 mm/rev, 0,5 mm/rev dan 0,7 mm/rev. Hasil yang diperoleh dari penelitian ini menunjukan bahwa dengan menggunakan 100 rpm dan feeding 0,5 hingga 0,7 mengakibatkan bisa membuat hasil akurasi lubang tersebut tidak simetris dan mengakibatkan delaminasi pada lubang tersebut, akan tetapi jika rpm tersebut lebih tinggi seperti 700 dan 1400 rpm dan menggunakan feeding yang tinggi maka akurasi lubang lebih simetris Indonesian Society of Applied Science 2022-08-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/430 10.52158/jamere.v2i2.430 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 2 No. 2: August 2022; 62-67 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 2 No 2: August 2022; 62-67 2775-1031 10.52158/jamere.v2i2 ind https://journal.isas.or.id/index.php/JAMERE/article/view/430/145 Copyright (c) 2022 Radiansyah Giga Suhartono, Anggit Murdani

oai:ojs2.journal.isas.or.id:article/438 2023-01-31T09:33:27Z JAMERE:ART driver

Developing Technology Center Of Excellence (COE), Center Of Heavy Equipment To Prepare Competent Heavy Equipment Mechanics And Operators Pengembangan Pusat Unggulan Teknologi, Center Of Heavy Equipment Untuk Mempersiapkan Sdm Bidang Mekanik Dan Operator Alat Berat Yang Kompeten Hamid, Abdul Fikri, Mohammad Anas Febriana, Ike Dayi Ulfiyah, Laily Fatah, Misbakhul Hadiwijaya, Lukman Jakfar, Amin Wilujeng, Auliana Diah Annafiyah, Annafiyah Rohmah, Faizatur Hamid, Abdul D, Ratna Ayu Pawestri K. Wijaya, Septian Dwi Ulfah, Nadiyah Wicaksono, Dimas Aryo Fachrudin, Ghopal Ahmad Harsono, Eddy Hamid, Abdul Fikri, Mohammad Anas Febriana, Ike Dayi Ulfiyah, Laily Fatah, Misbakhul Hadiwijaya, Lukman Jakfar, Amin Wilujeng, Auliana Diah Annafiyah, Annafiyah Rohmah, Faizatur Hamid, Abdul D, Ratna Ayu Pawestri K. Wijaya, Septian Dwi Ulfah, Nadiyah Wicaksono, Dimas Aryo Fachrudin, Ghopal Ahmad Harsono, Eddy Uptake of Vocational graduates, IPM Madura, PUT-CHE, Competent Human Resources The low demand for vocational education graduates has led to high unemployment. The low demand for vocational education graduates has led to high unemployment. Vocational college graduates still need to be commensurate with industrial needs. Many Senior High School, Vocational High School, and Vocational College graduates have not been able to find a job for more than six months. Conditions on Madura island worsened this, and the lack of accelerated industrialization even after the Suramadu Bridge was built. Madura has the lowest Human Development Index (HDI) score in East Java. Data from the Central Bureau of Statistics (BPS) Sampang in Figures 2021) shows that the HDI value in 2020 only increased by 0.76 from 2019 of 62.70. Politeknik Negeri Madura (Poltera) together with PT. United Tractors and LSP ABI want to take an active role in improving Madura's HDI by preparing human resources on heavy equipment mechanics through the development of a centre of excellence for technology (PUT) of Heavy Equipment (CHE). Using the causal-comparative method, the researcher observed the impact of each stage on PUT-CHE development activities and reviewed the data to find causal factors and correlations. Poltera took a strategic step by equipping lecturers with virtual training on heavy equipment mechanics (SOBAT Program), organized by PT United Tractors. The SOBAT program has positively impacted heavy equipment engineering graduates in 2022, which has increased significantly. Academic data showed that 13 out of 34 heavy equipment mechanical engineering graduates were employed in leading heavy equipment industries before three months. Other data stated that three lecturers participating in Virtual Training on heavy equipment mechanics were selected as 50 interns at PT United Tractors. Rendahnya serapan lulusan pendidikan vokasi menyebabkan tingginya angka pengangguran. Lulusan Perguruan Tinggi Vokasi (PTV) belum sepadan dengan kebutuhan industri. Banyak lulusan SMA, SMK, dan PTV belum memperoleh pekerjaan hingga lebih dari 6 bulan. Kondisi di pulau Madura, percepatan industrialisasi pasca suramadu belum terwujud dan Indeks Pembangunan Manusia (IPM) terendah di Jawa Timur. Data BPS (Sampang dalam Angka 2021), IPM tahun 2020 hanya naik sebesar 0,76 dari tahun 2019 sebesar 62,70. Politeknik Negeri Madura (Poltera) bersama PT. United Tractors dan LSP Alat Berat Indonesia ingin berperan aktif meningkatkan IPM Madura dengan penyiapan SDM bidang mekanik alat berat melalui pengembangan pusat keunggulan teknologi (PUT) Center of Heavy Equipment (CHE). Dengan metode kausal-komparatif, peneliti mengamati konsekuensi tahapan kegiatan pengembangan PUT-CHE dan melihat ulang data untuk menemukan faktor penyebab dan hubungannya. Langkah strategis Poltera membekali dosen dalam virtual training bidang mekanik alat berat yang diselenggarakan PT. United Tractors dalam program SOBAT berdampak positif bagi lulusan teknik mesin alat berat tahun 2022 yang meningkat signifikan. Data akademik, 13 dari 34 lulusan prodi teknik mesin alat berat bekerja di industri alat berat terkemuka sebelum 3 bulan. Data lain menyebutkan 3 dosen peserta Virtual Training bidang mekanik alat berat lolos 50 peserta magang di PT. United Tractors Indonesian Society of Applied Science 2023-02-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/438 10.52158/jamere.v3i1.438 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 3 No. 1: February 2023; 34-39 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 3 No 1: Februari2023; 34-39 2775-1031 eng https://journal.isas.or.id/index.php/JAMERE/article/view/438/172 Copyright (c) 2023 Mohammad Anas Fikri,, Ike Dayi Febriana, Laily Ulfiyah, Misbakhul Fatah, Lukman Hadiwijaya Amin Jakfar, Auliana Diah Wilujeng, Annafiyah, Faizatur Rohmah, Abdul Hamid, Ratna Ayu Pawestri K.D., Septian Dwi Wijaya Nadiyah Ulfah Dimas Aryo Wicaksono, Ghopal Ahmad Fachrudin, Eddy Harsono

oai:ojs2.journal.isas.or.id:article/445 2023-01-31T09:30:01Z JAMERE:ART driver

Analisis Pengaruh Co-Firing Biomassa Terhadap Kinerja Peralatan Boiler PLTU Batubara Unit 1 PT. XYZ Analisis Pengaruh Co-Firing Biomassa Terhadap Kinerja Peralatan Boiler PLTU Batubara Unit 1 PT. XYZ Dwiaji, Yudhi Chandra Dwiaji, Yudhi Chandra Co-firing, biomass, boiler, renewable energy, power plants co-firing biomassa boiler energi terbarukan pembangkit listrik A biomass co-firing program has been put in place at power plants by PLN to support policies relating to the renewable energy mix. The extent to which continuous biomass co-firing at various generating load conditions will affect the performance of boiler equipment is unknown. The goal of this study is to ascertain the effects of ongoing biomass co-firing on the efficiency of boiler equipment under various generating load scenarios. An observational approach as well as interviewing techniques were used to collect the data. By hand, using Microsoft Excel software, the calculation value for a specific fuel consumption and net plant heat rate is found. The operating parameters of the boiler equipment performance are then compared with benchmark or commissioning data. The performance of boiler equipment (medium speed mill, boiler fan, air preheater) is unaffected by the co-firing process, and all of its parameters remain within acceptable bounds. As can be seen from the Mmdium speed mill motor and boiler fan flows, which decreased but not significantly, the performance of boiler equipment during the co-firing process is lighter. There is a decrease in boiler furnace temperature despite changes in load, and boiler equipment performance is still within limits. The average total production cost dropped from 485.324 Rp/Kwh to 484.585 Rp/Kwh with co-firing. During the course of the study, the average Net Plant Heat Rate during the co-firing process fell from 2862.85 kcal/kwh to 2866.35 kcal/kwh. Program co-firing biomassa telah diterapkan di pembangkit listrik oleh PLN untuk mendukung kebijakan yang berkaitan dengan bauran energi terbarukan. Sejauh mana co-firing biomassa terus menerus pada berbagai kondisi beban pembangkit akan mempengaruhi kinerja peralatan boiler tidak diketahui. Tujuan dari penelitian ini adalah untuk memastikan efek dari co-firing biomassa yang sedang berlangsung pada efisiensi peralatan boiler di berbagai skenario beban pembangkit. Pendekatan observasi serta teknik wawancara digunakan untuk mengumpulkan data. Dngan menggunakan perangkat lunak Microsoft Excel secara manual, diharapkan dapat memperoleh nilai perhitungan untuk konsumsi bahan bakar spesifik dan laju panas bersih pembangkit, dimana parameter operasi kinerja peralatan boiler dibandingkan dengan data benchmark atau commissioning. Dari penelitian dihasilkan bahwa performa peralatan boiler (medium speed ​​mill, kipas boiler, air preheater) tidak terpengaruh oleh proses co-firing, dan semua parameternya tetap berada dalam batas yang dapat diterima. Diperoleh juga bahwa aliran motor medium speed ​​mill dan fan boiler yang menurun tidak signifikan dan kinerja peralatan boiler pada saat proses co-firing ternyata menjadi lebih ringan. Dilain sisi terdapat penurunan suhu tungku boiler beserta terjadinya perubahan beban, namun kinerja peralatan boiler masih dalam batas. Rata-rata total biaya produksi turun dari 485.324 Rp/Kwh menjadi 484.585 Rp/Kwh dengan co-firing. Selama penelitian berlangsung, rata-rata net Plant Heat Rate selama proses co-firing turun dari 2862,85 kcal/kwh menjadi 2866,35 kcal/kwh. Indonesian Society of Applied Science 2023-02-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/445 10.52158/jamere.v3i1.445 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 3 No. 1: February 2023; 7-15 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 3 No 1: Februari2023; 7-15 2775-1031 eng https://journal.isas.or.id/index.php/JAMERE/article/view/445/167 Copyright (c) 2023 Yudhi Chandra Dwiaji

oai:ojs2.journal.isas.or.id:article/446 2023-01-31T09:30:01Z JAMERE:ART driver

Perancangan Bejana Tekan Dalam Aspek Kekuatan Mekanik Berdasarkan Code Standard ASME VII DIV 1 Studi Kasus Crude OilStripper Pada Central Processing Facilities Banyu Urip Project Cepu Perancangan Bejana Tekan Dalam Aspek Kekuatan Mekanik Berdasarkan Code Standard ASME VII DIV 1 Studi Kasus Crude OilStripper Pada Central Processing Facilities Banyu Urip Project Cepu Dwiaji, Yudhi Chandra Dwiaji, Yudhi Chandra shell head nozzle pressure vessel bejana tekan The shell, head, nozzle, and supports of pressure vessels are based on the results of manual calculations and are widely used in petrochemical plants, energy (power plants), oil and gas (oil and gas plants), and the industrial sector as a whole. The objective of this analysis is to comprehend the code that is used in the vertical pressure vessel design calculations so that they can be utilized in the field. The purpose, aesthetic value, and working environment of the pressure vessel must all be taken into consideration when designing its shape. Design pressure, the ship's dead weight, wind loads, earthquake-related loads, and combined loads are among the ship's loads. The ASME Part VIII Division I code standards are utilized when designing pressure vessels. Microsoft Excel software is used to calculate the shell thickness, head, nozzle, and support, or manual calculation is used. The thicknesses of the shell, head, nozzle, and support vary according to the results of the manual calculations. Shell thickness 1: 13mm, shell thickness 2: 16mm, shell thickness 3: 16mm, top head thickness: 13mm, bot head thickness: 16mm, nozzle thickness: 6mm, skirt thickness: 22mm. Shell, head, nozzle, dan penyangga bejana tekan berdasarkan hasil perhitungan manual dan banyak digunakan di pabrik petrokimia, energi (pembangkit listrik), minyak dan gas (pabrik minyak dan gas), dan sektor industri sebagai utuh. Analisis ini bertujuan untuk memahami kode-kode yang digunakan dalam perhitungan desain bejana tekan vertikal sehingga dapat dimanfaatkan di lapangan. Tujuan, nilai estetika, dan lingkungan kerja bejana tekan semuanya harus dipertimbangkan saat mendesain bentuknya. Tekanan desain, bobot mati kapal, beban angin, beban terkait gempa, dan beban gabungan termasuk beban kapal. Standar kode ASME Bagian VIII Divisi I digunakan saat merancang bejana tekan. Perangkat lunak Microsoft Excel digunakan untuk menghitung ketebalan shell, head, nozzle, dan support, atau perhitungan manual digunakan. Ketebalan shell, head, nozzle, dan support bervariasi menurut hasil perhitungan manual. Tebal shell 1 : 13mm , tebal shell 2 : 16mm , tebal shell 3 : 16mm , tebal top head : 13mm , tebal bot head : 16mm , tebal nozzle : 6mm , tebal skirt : 22mm Indonesian Society of Applied Science 2023-02-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/446 10.52158/jamere.v3i1.446 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 3 No. 1: February 2023; 1-6 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 3 No 1: Februari2023; 1-6 2775-1031 eng https://journal.isas.or.id/index.php/JAMERE/article/view/446/166 Copyright (c) 2023 Yudhi Chandra Dwiaji

oai:ojs2.journal.isas.or.id:article/447 2023-05-17T04:25:59Z JAMERE:ART driver

Performance Analysis of Mango Fruit Freezing System Using Solar Energy kurniawan, yudhy Khoirun, Bobi Rohmat, Yusup Nur Hamid, M. Idrus Al Yatim, Ardiyansyah kurniawan, yudhy Khoirun, Bobi Rohmat, Yusup Nur Hamid, M. Idrus Al Yatim, Ardiyansyah Utilization of solar energy, freezer, performance Pemanfaatan energy surya, freezer, performansi The use of steam compression refrigeration systems is growing both domestically and commercially. The impact of electrical energy consumption in this sector is quite large compared to the need for electrical energy in other electronic equipment. Various efforts were made to be able to reduce the consumption of electrical energy for the cooling system. One of the efforts made by utilizing the natural potential of energy around is solar energy as a source of electrical energy in the mango freezing unit. This fruit is one of the main commodities in West Java, especially in Indramayu Regency. This study aims to determine the performance of the use of solar energy and the need for electrical energy for freezing mango fruit. In the process, freezing is carried out at temperatures below the freezing point of the ingredients/food. Good freezing usually ranges from -12 oC to -24oC. With this temperature, food can last up to 3 to 12 months. Although for freezing mango fruit, it is necessary to have additional treatment so as not to damage the physical structure and quality of the fruit. The method used is to use solar panels as a source of electrical energy in the mango freezing unit. From the tests carried out with variations in the tilt angle of the solar panels, 0°, 20°, and 40° which then from the calculation analysis it is known the comparative value of performance/efficiency and also the consumption of electrical energy generated from each angle of inclination Penggunaan refrigerasi system kompresi uap semakin berkembang baik skala domestik maupun komersial. Dampaknya konsumsi energy listrik pada sector ini cukup besar dibandingkan kebutuhan energy listrik pada peralatan elektronik lainnya. Berbagai upaya dilakukan agar mampu menekan konsumsi energy listrik untuk system pendingin. Salah satu upaya yang dilakukan dengan memanfaatkan potensi alam energy yang ada disekitar yaitu energy surya sebagai sumber energy listrik pada unit pembekuan buah mangga. Buah ini merupakan salah satu komoditas utama di Jawa Barat khususnya di Kabupaten Indramayu. Tujuan penelitian ini agar diketahui kinerja dari pemanfaatan energy surya dan kebutuhan energi listrik untuk pembekuan buah Mangga. Dalam prosesnya pembekuan dilakukan pada suhu dibawah titik beku bahan/makanan. Pembekuan yang baik biasanya berkisar antara -12 oC sampai dengan -24oC. Dengan temperature tersebut, makanan dapat awet hingga 3 hingga 12 bulan. Walaupun untuk pembekuan buah mangga perlu adanya perlakuan tambahan agar tidak merusak struktur fisik dan kualitas buahnya. Metode yang digunakan yaitu memanfaatkan panel surya sebagai sumber energy listrik pada unit pembekuan buah mangga. Dari pengujian yang dilakukan dengan variasi sudut kemiringan panel surya, 0°, 20°, dan 40° yang kemudian dari analisa perhitungan diketahui nilai perbandingan performansi / efisiensi dan juga konsumsi energy listrik yang dihasilkan dari masing-masing sudut kemiringan tersebut. Indonesian Society of Applied Science 2023-02-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/447 10.52158/jamere.v3i1.447 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 3 No. 1: February 2023; 40-44 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 3 No 1: Februari2023; 40-44 2775-1031 eng https://journal.isas.or.id/index.php/JAMERE/article/view/447/173 Copyright (c) 2023 Yudhy Kurniawan, Bobi Khoirun, Yusup Nur Rohmat, M. Idrus Al Hamid, Ardiyansyah Yatim

oai:ojs2.journal.isas.or.id:article/476 2023-05-10T05:26:25Z JAMERE:ART driver

Perencanaan Instalasi Air Conditioner (AC) Pada Hotel Champions Perencanaan Instalasi Air Conditioner (AC) Pada Hotel Champions Chandra, Yudi Chandra, YUdi Air Conditioner, Installation design Air Conditioner, Perancangan instalasi Comfort in a room is a necessity for everyone who is in the room, to support the activity in the room and increase work productivity, Air Conditioner is an equipment used to condition the air in a room so that it can reach temperature and humidity according to the conditions air that provides work comfort for people who do certain activities in the room. Therefore, the air conditioning system or air conditioning system (AC) has become a necessity in buildings, offices and housing, all of which can not be separated from the need for electrical energy, especially for air conditioner installations. To get air with the desired conditions, the selected equipment must match the capacity according to the cooling load in the room, for this final project special installation planning for Air Conditioners is done, namely calculations to determine the cooling load according to the room, as well as conductor selection in accordance with the calculation load, from the calculation results, obtained the number of air-cooled loads or first-floor Champion hotel air conditioner is 108,692 BTU / day with a total power of 7,920 watts, and the appropriate cross section based on the count is 1.5 mm2, and the main safety (MCCB) is 25 A. Kenyamanan dalam suatu ruangan merupakan kebutuhan bagi setiap orang yang berada di dalam ruangan tersebut, untuk menunjang aktivitas dalam ruangan tersebut dan meningkatkan produktivitas kerja, Air Conditioner merupakan suatu peralatan yang digunakan untuk mengkondisikan udara dalam suatu ruangan sehingga dapat mencapai temperatur dan kelembaban yang sesuai dengan kondisi udara yang memberikan kenyamanan kerja bagi orang yang melakukan kegiatan tertentu didalam ruangan tersebut. Oleh karena itu, sistem pendingin udara atau sistem tata udara (AC) sudah menjadi kebutuhan di gedung-gedung, perkantoran maupun perumahan, semua itu tidak terlepas dari kebutuhan energi listrik khusunya untuk instalasi pendingin ruangan (Air Conditioner). Untuk mendapatkan udara dengan kondisi yang diinginkan, maka peralatan yang dipilih harus sesuai dengan kapasitas sesuai dengan beban pendinginan yang ada dalam ruangan, untuk itu pada tugas akhir ini dilakukan perencanaan instalasi khusus untuk Air Conditioner yaitu perhitungan untuk menentukan beban pendingin sesuai ruangan, serta pemilihan penghantar sesuai dengan beban perhitungan, dari hasil perhitungan, didapatlah jumlah beban pendingin ruangan atau Air Conditioner hotel Champion lantai satu ialah 108,692 BTU/hr dengan total daya sebesar 7,920 watt, dan penampang penghantar yang sesuai berdasarkan hitungan adalah ukuran 1,5 mm2, dan pengaman utama (MCCB) ialah sebesar 25 A. Indonesian Society of Applied Science 2021-02-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/476 10.52158/jamere.v1i1.476 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 1 No. 1: February 2021; 34-39 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 1 No 1: Februari 2021; 34-39 2775-1031 10.52158/jamere.v1i1 ind https://journal.isas.or.id/index.php/JAMERE/article/view/476/178 Copyright (c) 2021 Yudi Chandra

oai:ojs2.journal.isas.or.id:article/542 2023-08-24T02:22:17Z JAMERE:ART driver

Design of Ergonomic Soil Compactor with Gasoline Engine Drive Rancang Bangun Alat Pemadat Tanah yang Ergonomis dengan Penggerak Motor Bensin Hamid, Abdul Hamid, Abdul Soil compactor Ergonomic Gasoline Engine Pemadat Tanah Ergonomis Motor Bensin Soil compaction with simple equipment can result in poor solid soil quality because there are still many lumps of rock/gravel that have not been leveled on the compacted soil. In addition, the use of simple equipment can also cause the level of worker fatigue to increase due to the work of the muscles that are so large and work postures that are not ergonomic. So it is necessary to make soil compactor. In the manufacture of this soil compactor, it is necessary to have a theory or method as guide for the preparation in the process of making the tool. Starting from the calculation of engine power and the framework used, methods of using ergonomics data, such as body dimension analysis on anthropometric data. The results obtained from the design are centrifugal force of 14.8 KN, the weight of the compactor when operating is 79.4 kg, the height of the embankment that can be compacted is 4-5 cm, the compaction area achieved is 250 m²/hour, and the vibration frequency is 3 Hz or 18.85 rad/s. From the manufacture of this tool, it can help the process of soil compaction and increase efficiency and productivity of cultivating land or building floors that will be carried out, especially for construction workers in the Pamekasan. Pemadatan tanah dengan peralatan sederhana dapat mengakibatkan kualitas tanah padat yang kurang baik karena masih banyak bongkahan batu/kerikil yang belum diratakan pada tanah yang telah dipadatkan. Selain itu penggunaan peralatan yang sederhana juga dapat menyebabkan tingkat kelelahan pekerja meningkat akibat kerja otot yang begitu besar dan postur kerja yang tidak ergonomis. Sehingga perlu dibuat alat pemadat tanah. Dalam pembuatan alat pemadat tanah ini diperlukan teori atau metode sebagai pedoman persiapan dalam proses pembuatan alat tersebut. Mulai dari perhitungan tenaga mesin dan rangka yang digunakan, metode penggunaan data ergonomi, seperti analisis dimensi tubuh pada data antropometri. Hasil yang diperoleh dari perancangan adalah gaya sentrifugal sebesar 14,8 KN, berat pemadat saat beroperasi 79,4 kg, tinggi timbunan yang dapat dipadatkan 4-5 cm, luas pemadatan yang dicapai 250 m²/jam, dan frekuensi getarannya adalah 3 Hz atau 18,85 rad/s. Dari pembuatan alat ini dapat membantu proses pemadatan tanah dan meningkatkan efisiensi dan produktivitas penggarapan tanah atau lantai bangunan yang akan dilakukan khususnya bagi para pekerja bangunan di Pamekasan. Indonesian Society of Applied Science 2023-08-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/542 10.52158/jamere.v3i2.542 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 3 No. 2: August 2023; 51-56 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 3 No 2: Agustus 2022; 51-56 2775-1031 10.52158/jamere.v3i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/542/211 Copyright (c) 2023 Misbakhul Fatah, Abdul Hamid, Ilham Anugrah Ilahi, Amin Jakfar, Annafiyah

oai:ojs2.journal.isas.or.id:article/543 2023-08-24T02:22:17Z JAMERE:ART driver

Perawatan Mesin Diesel Generator Pada Kapal KN.SAR SADEWA 231 Kristianto, Lukas Wibowo, Waris Astriawati, Ningrum Kristiawan, Nanang Astriawati, Ningrum aintenance, Diesel Engine, Generator Perawatan main engine generator A generator or alternator is a copper coil or coil consisting of a stator (static coil) and a rotor (rotating coil). The main function of the generator on board is to supply the electrical power needs on board. One of the disturbances that occur in generators is often the heat of the generator (overheating) and also the absence of electric voltage on the generator. The purpose of this study is to optimize maintenance on the generator maintenance system on KN ships. SAR SADEWA 231. This research is qualitative descriptive research. This research was on the engine of the KN SAR Sadewa 231 ship belonging to the Semarang Search and Rescue (SAR) Search and Rescue Office. The results showed that the generator on the main engine of the KN Ship. SAR SADEWA 231 uses an Alternating current (AC) generator power generation system. The implementation of maintenance of the generator system on the ship is good. The generator system parts that are treated include the stater dynamo, alternator, fuel filter, air filter, cooler, nozzle, bosh pump, turbocharge, muffler, and main board switch. Generator atau alternator merupakan kumparan atau gulungan tembaga yang terdiri dari stator (kumparan statis) dan rotor (berputar kumparan). Fungsi utama generator diatas kapal adalah untuk menyuplai kebutuhan daya listrik di kapal. Salah satu gangguan yang yang terjadi pada generator adalah sering panasnya generator (overheating) dan juga tidak keluarnya tegangan listrik pada generator. Tujuan dari penelitian ini adalah untuk melakukan optimasi perawatan tentang sistem perawatan generator pada kapal KN. SAR SADEWA 231. Penelitian  ini merupakan penelitian deskriptif kualitatif. Penelitian ini berada di engine Kapal KN SAR Sadewa 231 milik Kantor Pencarian dan Pertolongan Search and Rescue (SAR) Semarang. Hasil penelitian menunjukkan bahwa generator pada mesin utama Kapal KN. SAR SADEWA 231 menggunakan sistem pembangkit listrik generator berjenis alternating current (AC). Pelaksanaan perawatan sistem generator di kapal sudah baik. Bagian sistem generator yang dirawat meliputi dinamo stater, alternator, fuel filter, filter udara, cooler, nozzle, bosh pump, turbocharge, muffler, switch main board. Indonesian Society of Applied Science 2023-08-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/543 10.52158/jamere.v3i2.543 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 3 No. 2: August 2023; 45-50 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 3 No 2: Agustus 2022; 45-50 2775-1031 10.52158/jamere.v3i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/543/210 Copyright (c) 2023 Lukas Kristianto, Waris Wibowo, Ningrum Astriawati, Nanang Kristiawan

oai:ojs2.journal.isas.or.id:article/570 2023-08-24T02:22:17Z JAMERE:ART driver

Perancangan Mesin Pembuat Pellet Untuk Campuran Cangkang Telur Sebagai Konsentrat Kapasitas 10 Kg/Jam Dengan Metode Pahl dan Beitz Yudhi Chandra Dwiaji Yudhi Chandra Dwiaji kulit telur pellet pahl beitz limbah makanan The egg shell is one of the wasted that is often found in the community and the egg processing industry. With the increase in population and public consumption. Egg shells are generally just thrown away. The content of egg shells in the form of CaCO3, which is harmful to the environment due to microbial activity in the environment, can cause environmental pollution. The use of egg shells as animal feed ingredients and organic fertilizers can be given because egg shells contain several mineral substances such as macro minerals, macro. Machines on the market only produce one form in one process, namely in the form of pellets or flour. In pellet-producing machines on the market, shell waste before being processed, eggs are crushed manually so it can take a lot of time is designing a pellet making machine using the Pahl and Beitz design method. The Pahl and Beitz method has 4 important phases, such as planning, product concept design, shape design and detailed design, so that the design carried out can provide the right solution. The pellet making machine designed with a capacity of 10 kg /hour include process eggshell waste into flour with a grinding unit and pellet maker simultaneously. Cangkang telur merupakan salah satu limbah yang sering dijumpai di masyarakat dan industri pengolahan telur. Dengan bertambahnya jumlah penduduk dan konsumsi masyarakat. Cangkang telur umumnya dibuang begitu saja. Kandungan cangkang telur berupa CaCO3 yang berbahaya bagi lingkungan akibat aktivitas mikroba di lingkungan dapat menyebabkan pencemaran lingkungan. Pemanfaatan cangkang telur sebagai bahan pakan ternak dan pupuk organik dapat diberikan karena cangkang telur mengandung beberapa zat mineral seperti mineral makro. Mesin yang ada di pasaran hanya menghasilkan satu bentuk dalam satu kali proses yaitu berupa pelet atau tepung. Pada mesin pembuat pelet yang ada di pasaran, limbah cangkang telur sebelum diolah, dihaluskan secara manual sehingga memakan waktu yang cukup lama. Dalam perancangan mesin pembuat pelet menggunakan metode perancangan Pahl dan Beitz. Metode Pahl dan Beitz memiliki 4 tahapan penting yaitu perencanaan, desain konsep produk, desain bentuk dan desain detail sehingga desain yang dilakukan dapat memberikan solusi yang tepat. Mesin pembuat pelet yang dirancang dengan kapasitas 10 kg/jam meliputi proses pengolahan limbah cangkang telur menjadi tepung dengan unit penggiling dan pembuat pelet secara bersamaan. Indonesian Society of Applied Science 2023-08-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/570 10.52158/jamere.v3i2.570 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 3 No. 2: August 2023; 57-68 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 3 No 2: Agustus 2022; 57-68 2775-1031 10.52158/jamere.v3i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/570/212 Copyright (c) 2023 Yudhi Chandra Dwiaji, Ramadhan Syahputra Nasution

oai:ojs2.journal.isas.or.id:article/571 2023-08-24T02:22:17Z JAMERE:ART driver

Pengaruh Variasi Temperatur Perlakuan Panas dan Media Pendingin Terhadap Sifat Mekanis dan Mikrostruktur Aluminium 2024 Yudhi Chandra Dwiaji Yudhi Chandra Dwiaji aluminum 2024 hardness rockwell heat treatment quenching aluminium 2024 hardness rockwell perlakuan panas quenching Aluminum alloys 2024 is a kind of metal that enjoys a few upper hands over different sorts of metals. Aluminum composite 2024 is utilized in the common and military airplane industry, to be specific in the skin part of the airplane. Working on the nature of this aluminum amalgam should be possible through heat treatment. To work on the nature of the 2024 aluminum alloys, an intensity therapy process is completed. This study was led to decide the hardness esteem in aluminum materials in 2024 when going through heat treatment. This test was completed at the Machining Studio of PT. GMF Air Asia. utilizing hardness test hardware subsequent to being exposed to warm treatment. The example to be tried, specifically aluminum sheet 2024 thickness 1.6mm with a size of 30 cm x 20 cm. In the warming system for aluminum 2024, it is conveyed outby embedding examples into the warming kitchen to a temperature of 400° C and 500° C, and followed by a regulation cycle with a period of 3 - 5 minutes each. After the intensity therapy process, the following system is the cooling system by dunking aluminum 2024 into the oil and watercooling media compartment until the temperature on the example gets back to business as usual. In the wake of cooling, it was gone on with rockwell hardness testing. In this test, 5 information assortment focuses were done on every example with various places. The consequences of rockwell hardness testing before heat treatment were 29.62 HRB. After heat treatment, the most elevated hardness was found in test examples with oil cooling media at a temperature of 500° C, in particular 59.68 HRB. what's more, the least was tracked down in a comparative treatment to water cooling media at a temperature of 500° C, specifically 56.38 HRB Kombinasi aluminium 2024 adalah jenis logam yang lebih unggul dari berbagai jenis logam. Aluminium paduan 2024 digunakan pada industri pesawat sipil maupun militer yaitu pada bagian kulit pesawat. Peningkatan kualitas paduan aluminium ini dapat dilakukan dengan cara perlakuan panas. Untuk meningkatkan kualitas paduan aluminium 2024 tersebut dilakukan metode perlakuan panas. Penelitian ini dilakukan untuk mengetahui nilai kekerasan pada material aluminium 2024 sebelum dan setelah mengalami perlakuan panas. Pengujian ini dilakukan di Workshop Machining PT.GMF AeroAsia. menggunakan alat uji kekerasan setelah mengalami perlakuan panas. Spesimen yang akan diuji, yaitu aluminium sheet 2024 ketebalan 1.6mm dengan ukuran 30cm x 20cm. Pada proses pemanasan untuk aluminium 2024 dilakukan dengan cara memasukkan spesimen kedalam dapur pemanas hingga sampai pada temperatur 400˚ C dan 500˚ C, dan diikuti dengan proses penahanan dengan waktu masing - masing 35 menit. Setelah proses perlakuan panas, proses selanjutnya adalah proses pendinginan dengan cara mencelupkan aluminium 2024 kedalam wadah media pendingin oli dan air sampai suhu pada spesimen kembali normal. Setelah dilakukan pendinginan dilanjutkan dengan pengujian kekerasan hardness rockwell. Pada pengujian ini dilakukan 5 titik pengambilan data pada setiap spesimen dengan titik yang berbeda-beda. Hasil pengujian kekerasan hardness rockwell sebelum dilakukan perlakuan panas yaitu 29.62 HRB. Setelah dilakukan perlakuan panas menghasilkan angka kekerasan tertinggi terdapat pada spesimen uji dengan media pendinginan oli pada suhu 500˚ C yaitu 59.68 HRB. dan terendah terdapat pada perlakuan serupa dengan media pendingin air pada suhu 500˚ C yaitu 56.38 HRB. Indonesian Society of Applied Science 2023-08-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/571 10.52158/jamere.v3i2.571 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 3 No. 2: August 2023; 69-75 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 3 No 2: Agustus 2022; 69-75 2775-1031 10.52158/jamere.v3i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/571/213 Copyright (c) 2023 Yudhi Chandra Dwiaji

oai:ojs2.journal.isas.or.id:article/609 2023-08-24T02:22:17Z JAMERE:ART driver

Pembuatan Model Turbin Air Dengan Sistem Sirkulasi Tertutup Pembuatan Model Turbin Air Dengan Sistem Sirkulasi Tertutup Muh Anhar Muh Anhar Pelton Turbine;Circulation Turbin Pelton; Sirkulasi Modern society is very attached to technological advances, With community technology can easily meet energy needs, one example is the electrical energy processing of energy conversion machines using turbine energy.The purpose of this manufacture is to find a solution to meet the need for electrical energy, as well as solving problems encountered in areas where there is no stream or waterfall.. as for the methodology in making this includes time and place, tools making, Tools and Materials and Methods of execution of Flow diagrams.The calculation result for effective head = 0.3 m, with the water discharge used to move the runner Q = 0.00033836 m3/s, obtained power generated for 0,87 Watt. With the data planned, the main dimension of Pelton type turbine is the outer diameter of the runner Do = 435.28 mm, diameter of D = 400 mm, the number of bowl z = 59 pieces with 1 nozzle Masyarakat modern sangat lekat dengan kemajuan teknologi. Dengan teknologi masyarakat dapat dengan mudah memenuhi kebutuhan energi, salah satu contoh adalah energi listrik hasil pengolahan mesin konversi energi air dengan menggunakan turbin.Tujuan pembuatan adalah mencari solusi untuk memenuhi kebutuhan akan energi lisrik, sekaligus sebagai pemecahan masalah yang dihadapi pada daerah yang tidak ada aliran sungai ataupun air terjun. Adapun metodologi dalam pembuataan ini meliputi waktu dan tempat, Pembuatan alat, Alat dan Bahan dan Metode Pelaksanaan Diagram Alir.Hasil perhitungan untuk head efektif = 0,3 m, dengan debit air yang digunakan untuk menggerakan runner Q = 0,00033836 m3/s, didapat daya yang dibangkitkan sebesar 0,87 Watt. Dengan data tersebut direncanakan dimensi utama turbin jenis Pelton yaitu diameter luar runner Do = 435,28 mm, diameter lingkaran tusuk D = 400 mm, jumlah mangkuk z = 59 buah dengan 1 noselKata kunci: kata kunci dituliskan dalam 5 kata yang sebaiknya merupakan subset dari judul makalah, ditulis dengan menggunakan huruf kecil kecuali untuk singkatan, dan dipisahkan dengan tanda baca koma untuk antar kata. Indonesian Society of Applied Science 2023-08-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/609 10.52158/jamere.v3i2.609 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 3 No. 2: August 2023; 76-80 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 3 No 2: Agustus 2022; 76-80 2775-1031 10.52158/jamere.v3i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/609/218 Copyright (c) 2023 Muh Anhar

oai:ojs2.journal.isas.or.id:article/610 2023-08-24T02:22:17Z JAMERE:ART driver

Effect of Adding Admixture on Slump Value and Concrete Compressive Bleeding Pengaruh Penambahan Admixture Terhadap Nilai Slump dan Kuat Tekan Beton Bleeding Darsini Pramuda Triwardana, Eko Ahya, Rahmatul Darsini Pramuda Triwardana, Eko Ahya, Rahmatul concrete, bleeding, admxiture, compressive strength, slump beton, bleeding, admxiture, kuat tekan, slump Proyek konstruksi yang terjadi saat proses konstruksi maupun pasca konstruksi seringkali dapat kita jumpai beragam permasalahan, salah satunya adalah kerusakan pada beton segar seperti terjadinya bleeding pada beton segar. Kondisi volume beton cacat dalam 1 tahun di lokasi penelitian sebesar 307 m3 karena kondisi cuaca ekstrim (hujan) dibulan Oktober – Maret, nilai slump dapat berubah karena faktor tidak ditutupnya corong pada truk mixer. Penelitian ini dilakukan dengan menambahkan beton yang bleeding dengan admixture. Penelitian ini bertujuan untuk mengetahui beton yang bleeding dapat kembali menjadi beton normal setelah ditambahkan admixture, metode yang digunakan adalah metode eksperimen dengan menggunakan benda uji kubus ukuran 15x15x15 cm yang diuji yaitu pada umur, 3 hari, 7 hari, 14 hari, dan 28 hari. Mutu beton yang digunakan pada penelitian ini yaitu mutu C40 dan C50 dengan komposisi admixture yaitu 0,05%, 0,1%, dan 0,2%. Berdasarkan penelitian ini didapat hasil nilai slump untuk komposisi admixture 0,05% untuk C40 dan C50 adalah 24 dan 21 cm, untuk komposisi admixture 0,1% adalah 18 cm dan untuk komposisi admixture 0,2% adalah 17 dan 18 cm. Kuat tekan beton maksimum di umur 28 hari untuk komposisi admixture 0,1% dengan mutu C40 adalah 45,79 Mpa dan untuk mutu C50 adalah 59,14 Mpa. Waktu yang dibutuhkan untuk sekali perbaikan beton yang bleeding di lokasi pengecoran dengan menggunakan admixture yaitu 10 menit, sehingga dapat mengefisiensi waktu sebesar 205 menit atau setara dengan effisiensi waktu 95,34%. Dengan adanya admixture ini dapat menekan biaya sebesar Rp. 54.750.073 atau setara dengan 83,45% dari total volume bleeding sebesar 307 m3. In construction projects that occur during the construction or post-construction process, we can often encounter various problems, one of which is damage to fresh concrete such as bleeding in fresh concrete. The condition of the volume of deformed concrete in 1 year at the study site was 307 m3 due to extreme weather conditions (rain) in October - March, the slump value could change due to the fact that the funnel on the mixer truck was not closed. This research was carried out by adding bleeding concrete with admixture. This study aims to determine whether bleeding concrete can return to normal concrete after admixture is added. The method used is an experimental method using 15x15x15 cm cube specimens tested at age, 3 days, 7 days, 14 days, and 28 days. The quality of the concrete used in this study was C40 and C50 with an admixture composition of 0.05%, 0.1% and 0.2%. Based on this study, the slump values ​​for the 0.05% admixture composition for C40 and C50 were 24 and 21 cm, for the 0.1% admixture composition were 18 cm and for the 0.2% admixture composition were 17 and 18 cm. Maximum concrete compressive strength at 28 days of age for 0.1% admixture composition with C40 quality is 45.79 MPa and for C50 quality is 59.14 MPa. The time required for one repair of bleeding concrete at the casting location using admixture is 10 minutes, so that it can be time efficient by 205 minutes or equivalent to a time efficiency of 95.34%. With this admixture can reduce costs by Rp. 54,750,073 or equivalent to 83.45% of the total volume of bleeding of 307 m3. Indonesian Society of Applied Science 2023-08-15 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/610 10.52158/jamere.v3i2.610 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 3 No. 2: August 2023; 81-87 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 3 No 2: Agustus 2022; 81-87 2775-1031 10.52158/jamere.v3i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/610/220 Copyright (c) 2023 Darsini, Eko Pramuda Triwardana, Rahmatul Ahya

oai:ojs2.journal.isas.or.id:article/766 2024-11-23T00:29:28Z JAMERE:ART driver

Comparative Study of Composites from Fiberglass and Palm Fiber for Body in Energy Saving Car Contest Studi Perbandingan Komposit dari Fiberglass dan Serat Ijuk untuk Body pada Kontes Mobil Hemat Energi Hamid, Abdul Yoanda, Ilham Diah Wilujeng, Auliana Fatah, Misbakhul Hamid, Abdul Yoanda, Ilham Diah Wilujeng, Auliana Fatah, Misbakhul Komposit Serat Ijuk Fiberglass Kontes Mobil Hemat Energi Composite is a new engineering material whose main constituent consists of two or more materials. The combination of these materials will obtain better mechanical properties. Apart from that, making composites also has a relatively cheaper price when compared to other materials, especially metal materials. In this research, we created and carried out a comparative analysis of composites between fiberglass (woven roving) and palm fiber which were applied to the prototype body of the Energy Saving Car Contest. The composite manufacturing process in this research uses matrix material (resin), catalyst, fiberglass and palm fiber using the hand lay up method. The variations used in making composites are variations in the number of layers for fiberglass fiber (2 and 3 layers), and palm fiber using 2 and 3 layers with vertical, horizontal and random fiber directions. The results obtained for tensile strength testing obtained the highest value, namely 109.1 MPa (3 layers of woven roofing). Meanwhile, the highest bending test value was obtained at 4.52 MPa (3 layers of woven roofing). In testing composites based on the fiber direction, the highest tensile strength and bending values were obtained for specimens with 3 layers of random fiber direction, namely 11.1 and 1.18 MPa. Komposit merupakan material rekayasa baru yang mana penyusun utamanya terdiri dari dua atau lebih material. Kombinasi material tersebut akan mendapatkan sifat mekanis yang lebih baik. Selain itu, pembuatan komposit juga memiliki harga yang relatif lebih murah jika dibandingkan dengan material lain terutama material logam. Pada penelitian ini, kami membuat dan melakukan analisis perbandingan komposit antara fiberglass (woven roving) dan serat ijuk yang diaplikasikan pada prototipe body Kontes Mobil Hemat Energi (KMHE). Proses pembuatan komposit pada penelitian ini menggunakan material  matriks (resin), katalis, fiberglass dan serat ijuk dengan metode hand lay up. Adapun variasi yang digunakan dalam pembuatan komposit yaitu variasi jumlah lapisan untuk serat fiberglass (2 dan 3 lapis), dan serat ijuk menggunakan 2 dan 3 lapis dengan arah serat vertikal, horizontal dan acak. Hasil yang diperoleh untuk pengujian tensile strength didapatkan nilai paling tinggi yaitu 109,1 MPa (3 lapis woven rofing). Sementara, nilai pengujian bending paling tinggi diperoleh sebesar 4,52 MPa (3 lapis woven rofing). Pada pengujian komposit berdasarkan arah serat ijuk, nilai tensile strength dan bending tertinggi diperoleh pada spesimen dengan arah serat acak 3 lapis yaitu sebesar 11,1 dan 1,18 MPa. Indonesian Society of Applied Science 2024-01-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/766 10.52158/jamere.v4i1.766 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 1: February 2024; 11-14 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 1: February 2024; 11-14 2775-1031 10.52158/jamere.v4i1 eng https://journal.isas.or.id/index.php/JAMERE/article/view/766/263 Copyright (c) 2024 Abdul Hamid, Ilham Yoanda, Auliana Diah Wilujeng, Misbakhul Fatah

oai:ojs2.journal.isas.or.id:article/781 2024-11-23T00:29:28Z JAMERE:ART driver

Pengaruh Suhu, Injection Time dan Backpressure Terhadap Cacat Penyusutan Pada Produk Flange Chandra Dwiaji, YudhI Muklas, Iwan Halim, Abdul Chandra Dwiaji, Yudhi Muklas, Iwan Halim, Abdul haspel shrinkage injection molding backpressure haspel cacat penyusutan injection molding backpressure Haspel or often called cable reel is the item or tool needed to roll the cable. Usually this cable reel is made of wood. However, over time this haspel has changed, especially in the material used, which is made of plastic or polypropyelene (PP) material. This haspel consists of several components including: Flange and barrel reinforced using steel rods. All these components will be assembled and ready for sale. When assembled, the flange components must require a fairly good precision because the material used is plastic, the shrinkage factor plays a very important role when printed with an injection molding machine. At the time of assembling the plastic haspel, there was a failure when the raft product was too tight and there was also a loose raft, this was due to shrinkage in the flange which caused the barrel component to not fit into the router part of the flange. This makes the assembly work a little longer than usual. In this final project, the author takes steps on how to analyze shrinkage defects in plastic materials, especially for polypropylene materials, starting from the injection molding process and then taking product samples with different levels of testing through parameter settings. Different injection times and backpressures will result in different product sizes and shrinkage values. A good melting temperature value is used for polypropylene material with a flange thickness of 6 mm, and a flange diameter of 850 mm ranging from 210°C - 230°C. Shrinkage defects in polypropylene materials certainly exist, and may be greater than polystyrene materials but can be minimized by setting good process parameters. A good and ideal shrinkage value and according to standards occurs at a temperature setting of 220°C backpressure 0.2 Mpa with an injection time of 20 seconds. With constant parameters, starting from the injection speed of 60 mm/s. Injection pressure 18 Mpa and cooling time 250 seconds. Haspel atau yang sering disebut juga gulungan kabel merupakan barang atau alat yang dibutuhkan untuk menggulung kabel. Biasanya gulungan kabel ini dibuat dengan bahan dari kayu. Namun dengan seiring berjalannya waktu, haspel ini mengalami perubahan terutama pada material yang digunakan yaitu terbuat dari bahan plastik atau jenis material polypropyelene (PP). Haspel ini terdiri dari beberapa komponen diantaranya: flange dan barell yang diperkuat menggunakan besi rekstang. Semua komponen tersebut akan dirakit dan siap dijual. Pada saat dirakit komponen flange harus memerlukan kepresisian yang lumayan bagus oleh karena material yang digunakan plastik, maka faktor penyusutan (shrinkage) memegang peranan sangat penting pada saat dicetak dengan mesin injection molding. Pada saat perakitan haspel plastik pernah terjadi kegagalan produk rakit terlalu kencang dan ada juga rakit yang kendor, hal tersebut disebabkan karena adanya penyusutan pada flange yang menyebabkan komponen barell tidak bisa masuk pada router bagian dari flange. Hal tersebut membuat pekerjaan dibagian perakitan menjadi sedikit lebih lama dari biasanya. Didalam tugas akhir ini penulis melakukan langkah-langkah bagaimana teknik menganalisa cacat penyusutan (shrinkage) material plastik terutama dikhususkan material polypropyelene dimulai dari proses injection molding lalu diambil sampel produk dengan tingkat pengujian yang berbeda lewat settingan parameter. Dengan waktu injeksi dan backpressure yang berbeda-beda akan menghasilkan ukuran produk dan nilai shrinkage yang berbeda pula. Nilai temperatur leleh yang baik digunakan untuk material polypropyelene dengan ketebalan flange 6 mm, dan diameter flange 850 mm berkisar antara 210°C - 230°C. Cacat penyusutan pada material polypropylene pasti ada, dan mungkin lebih besar dari material polystyrene namun bisa diminimalkan dengan setting parameter proses yang bagus. Nilai shrinkage yang baik dan ideal dan sesuai standar terjadi pada settingan temperatur 220°C backpressure 0,2 Mpa dengan waktu injeksi yaitu 20 detik. Dengan parameter yang konstan, mulai dari injection speed 60 mm/s, injection pressure 18 Mpa dan cooling time 250 detik. Indonesian Society of Applied Science 2024-01-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/781 10.52158/jamere.v4i1.781 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 1: February 2024; 1-5 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 1: February 2024; 1-5 2775-1031 10.52158/jamere.v4i1 eng https://journal.isas.or.id/index.php/JAMERE/article/view/781/261 Copyright (c) 2024 Yudhi Chandra Dwiaji1, Iwan Muklas2, Abdul Halim3

oai:ojs2.journal.isas.or.id:article/783 2024-11-23T00:29:28Z JAMERE:ART driver

Analysis Of The Influence Of Preheating Temperatures Of 125˚C, 150˚C And 200˚C Metal Casting Results On The Occurrency Of Hot Tearing Using 6061 Alumunium Material Analisis Pengaruh Suhu Preheating 125˚C, 150˚C Dan 200˚C Hasil Pengecoran Logam Terhadap Terjadinya Hot Tearing Menggunakan Material Alumunium 6061 Haris, Emin Van Gunawan, Leo Luthfi, Muhammad Rakhman, Abdul Haris, Emin Van Gunawan, Leo Luthfi, Muhammad Rakhman, Abdul Aluminum 6061, Hot tearing defects, Pre heating Alumunium 6061 cacat hote tearing preaheating The aluminum casting industry has experienced a lot of innovation and creativity to maintain its existence. Metal casting is a process by which hot molten metal is poured into a mold containing hollow pieces or cavities of the desired finished shape. The process of casting with a permanent mold is preheating the casting mold before the casting process is carried out. This is done so that the temperature of the casting mold increases, so that the difference between the temperature of the mold and the temperature of the aluminum to be poured is not too great. This study aims to overcome or prevent hot tearing by increasing the preheating temperature in the mold. The test results show that the preheating temperature of 200ºC does not experience shrinkage in the metal casting results. Whereas at preheating temperatures of 125ºC and 150ºC there are hot tearing defects and there is shrinkage. whereas at the preheating temperature variation of 200ºC there are only shrinkage defects. The results of the vickers hardness test showed that the higher the preheating temperature, the hardness value of the casting product will increase. The highest vickers hardness value was obtained at the 200°C preheating temperature variation of 69.55 HV, while at the 150°C preheating temperature variation, the vickers hardness value was 68.51 HV. and at a variation of the preheating temperature of 125ºC, the vickers hardness value is 67.04 HV. The results obtained from metallographic testing are aluminum 6061. Judging from the microstructure at the 200℃ preheating variation, the dentite grains look smaller than the 125℃ preheating variation and the 150℃ preheating variation. It can be concluded that the higher the preheating temperature, the better the denrite density. Industri pengecoran aluminium telah mengalami banyak inovasi dan kreativitas untuk mempertahankan keberadaannya. Pengecoran logam adalah proses dimana logam cair yang panas dituangkan ke dalam cetakan yang berisi potongan berlubang atau rongga dengan bentuk jadi yang diinginkan. Proses dari pengecoran dengan cetakan permanen adalah preheating cetakan coran sebelum dilakukan proses penuangan. Hal ini dilakukan agar temperatur cetakan coran mengalami peningkatan, sehingga perbedaan antara temperatur cetakan dengan temperatur aluminium yang akan dituang tidak terlalu jauh Penelitian ini bertujuan untuk mengatasi atau mencegah terjadinya hot tearing dengan cara menaikan suhu preheating pada cetakan. Hasil pengujian menunjukkan bahwa suhu preheating 200ºC tidak mengalami penyusutan pada hasil pengecoran logam. Sedangkan di suhu preheating 125ºC dan 150ºC terdapat cacat hot tearing defect dan terdapat penyusutan. sedangkan pada variasi suhu preheating 200ºC hanya terdapat cacat penyusutan. Hasil pengujian kekerasan vickers menunjukkan bahwa semakin tinggi suhu preheating nilai kekerasan hasil pengecoran akan semakin meningkat, didapat nilai kekerasan vickers tertinggi pada variasi suhu preheating 200ºC sebesar 69,55 HV, sedangkan pada variasi suhu preheating 150ºC didapatkan nilai kekerasan vickers sebesar 68,51 HV, dan pada variasi suhu preheating 125ºC didapatkan nilai kekerasan vickers yaitu sebesar 67,04 HV. Hasil yang didapat dari pengujian metalografi adalah pada aluminium 6061. dilihat dari struktur mikro pada variasi preheating 200℃ butiran denrite terlihat lebih kecil dibandingkan dengan variasi preheating 125℃ dan variasi preheating 150℃, Dapat di simpulkan semakin tinggi suhu preheating maka kerapatan denrite akan semakin baik Indonesian Society of Applied Science 2024-02-02 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/783 10.52158/jamere.v4i1.783 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 1: February 2024; 15-21 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 1: February 2024; 15-21 2775-1031 10.52158/jamere.v4i1 eng https://journal.isas.or.id/index.php/JAMERE/article/view/783/264 Copyright (c) 2024 Emin Haris , Leo Van Gunawan, Muhammad Luthfi , Abdul Rakhman

oai:ojs2.journal.isas.or.id:article/788 2024-11-23T00:29:28Z JAMERE:ART driver

Analisis Kekasaran Mesin Bubut Konvensional dan CNC TU-2A Dengan Rpm 1500 Menggunakan Poros Aluminium Analisis Kekasaran Mesin Bubut Konvensional dan CNC TU-2A Dengan Rpm 1500 Menggunakan Poros Aluminium Rusdin Iswar, Muhammad Rusdin Iswar, Muhammad Lathe, Feeding, Aliminium and Lathe Chisels Conventional and CNC lathes are one of the numerical components as a production machine for manufacturing purposes that the industry relies on. To get the level of smoothness of a surface plays a very important role in the planning of a machine component, especially concerning the problem of friction, wear, resistance to fatigue as well as for surface roughness is closely related to the function of the component The manufacture of components does not merely have to have a small or smooth roughness value, but must also be in accordance with the functions and requests of the designer. TU 2A CNC lathe has a smaller roughness value (smoother) than the turning results using a conventional lathe. This is evidenced from the results of roughness testing where the smallest roughness value of the TU 2A CNC lathe is 1.27 µm and the smallest roughness value of the conventional lathe is 1.38 µm while the largest roughness value of the TU 2A CNC lathe is 2.68 µm and the surface roughness value for conventional lathes is 2.71 µm. The surface roughness class of the results of this study is in N6 to N8 Indonesian Society of Applied Science 2024-01-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/788 10.52158/jamere.v4i1.788 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 1: February 2024; 6-10 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 1: February 2024; 6-10 2775-1031 10.52158/jamere.v4i1 eng https://journal.isas.or.id/index.php/JAMERE/article/view/788/262 Copyright (c) 2024 Rusdin, Muhammad Iswar

oai:ojs2.journal.isas.or.id:article/792 2024-11-23T00:29:28Z JAMERE:ART driver

Implementation Of Total Productive Maintenance To Optimize Machine Availability At PT. ATMI SOLO Penerapan Total Productive Maintenance Guna Mengoptimalkan Ketersediaan Mesin di PT. ATMI Solo Darsini, Darsini Aditya Prabantara, Yonatan Darsini, Darsini Aditya Prabantara, Yonatan availability, TPM, downtime availability, TPM, downtime Optimal productivity needs to be supported by the availability of machines that are always ready to produce. The condition that needs to be maintained is that the machine does not stop frequently due to damage and causes the continuity of production to be hampered. According to the Japan Institute of Plant Maintenance (JIPM), the level of machine availability (availability) is said to be ideal when it exceeds 90%. At PT. ATMI Solo, 23.8% of 21 CNC machines still have availability percentage below 90%, namely Salvagnini S4 punching machine (69%), Starrag CF100 milling machine (79%), Trubend 3180 bending machine (82%), milling machine YCM TV 158B (82%), and Trumatic TC 200 R punching machine (89%).The main factor is the low availability of machines at PT. ATMI Solo is high machine downtime due to a breakdown. Therefore, it is necessary to implement Total Productive Maintenance (TPM) to optimize the availability of these machines. The implementation of TPM is Training and Education, Autonomous Maintenance, Planned Maintenance, and TPM in Administration (TPM in Administration), especially in the spare part Logistics section. The implementation of the TPM succeeded in increasing the availability percentage above 90% (based on data from the 2022 General Maintenance Daily Report), namely the Salvagnini S4 punching machine (94.13%), Starrag CF100 milling machine (96.36%), Trubend 3180 bending machine (99, 70%), YCM TV 158B milling machine (99.97%), and Trumatic TC 200 R punching machine (99.88%). Produktivitas yang optimal perlu ditunjang dengan ketersediaan mesin yang selalu siap berpoduksi. Kondisi yang perlu dijaga adalah jangan sampai mesin sering berhenti karena terjadi kerusakan dan menyebabkan kontinuitas produksi terhambat. Tingkat ketersediaan mesin (availability) menurut Japan Institute of Plant Maintenance (JIPM) dikatakan ideal bila sudah melebihi 90%. Di PT. ATMI Solo, sebanyak 23,8% dari 21 mesin CNC masih memiliki persentase availability dibawah 90%, yaitu mesin punching Salvagnini S4 (69%), mesin frais Starrag CF100 (79%), mesin bending Trubend 3180 (82%), mesin frais YCM TV 158B (82%), dan mesin punching Trumatic TC 200 R (89%). Faktor utama rendahnya ketersediaan mesin di PT. ATMI Solo adalah tingginya downtime mesin karena terjadi kerusakan. Karena itu perlu dilakukan penerapan Total Productive Maintenance (TPM) untuk mengoptimalkan ketersediaan mesin tersebut. Penerapan TPM yang dilakukan adalah Training and Education, Autonomous Maintenance, Planned Maintenance, dan TPM in Administration (TPM dalam Administrasi) terutama pada bagian Logistik spare part. Penerapan TPM tersebut berhasil menaikkan persentase availability diatas 90% (berdasarkan data Laporan Harian Umum Maintenance tahun 2022) yaitu mesin punching Salvagnini S4 (94,13%), mesin frais Starrag CF100 (96,36%), mesin bending Trubend 3180 (99,70%), mesin frais YCM TV 158B (99,97%), dan mesin punching Trumatic TC 200 R (99,88%). Indonesian Society of Applied Science 2024-02-02 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/792 10.52158/jamere.v4i1.792 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 1: February 2024; 22-27 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 1: February 2024; 22-27 2775-1031 10.52158/jamere.v4i1 eng https://journal.isas.or.id/index.php/JAMERE/article/view/792/265 Copyright (c) 2024 Darsini Darsini, Yonatan Aditya Prabantara

oai:ojs2.journal.isas.or.id:article/793 2024-11-23T00:29:28Z JAMERE:ART driver

HD785-7 Dump Truck Damage Analysis Using the Pareto Method, FMEA and SCAT Analisis Kerusakan Dump Truck HD785-7 Menggunakan Metode Pareto, FMEA dan SCAT Darsini, Darsini Susanto, Galih Darsini, Darsini Susanto, Galih FMEA, Maintenance, SCAT FMEA, Perawatan, SCAT PT Saptaindra Sejati (SIS) is a company currently known as a company engaged in mining Services. Companies are required to meet predetermined production targets to meet production targets must be supported by good production unit performance. This research discusses the damage to the Dump Truck HD785-7 production unit which causes a decrease in performance so that the company's productivity is not optimal. To reduce or prevent the failure of the HD785-7 Dump Truck, it is necessary to implement an improvement in good operation and maintenance. The methods used to overcome the poor performance of production units are Pareto method, Failure Mode and Effect Analyze (FMEA) and Systematic Cause Analysis Technique (SCAT). With the Pareto method to create a bar graph based on the number of events. The FMEA method of failure that occurs can be identified to prioritize. The SCAT method is to be able to analyze the system failure of several sub-systems, the levels below and to see the failure of components. From the results of data processing, it is known that there are 3 defects that have the greatest influence on the performance of the low power 03 damage unit with RPN 360, damage to work lights with RPN 216 and engine damage cannot be started with RPN 189. PT Saptaindra Sejati (SIS) merupakan salah satu perusahaan yang saat ini dikenal sebagai perusahaan yang bergerak di bidang jasa pertambangan. Perusahaan dituntut memenuhi target produksi yang telah ditentukan untuk memenuhi target produksi harus didukung dengan perfoma unit produksi yang baik. Penelitian ini membahas tentang kerusakan unit produksi Dump Truck HD785-7 yang menyebabkan penurunan performa sehingga membuat produktivitas perusahaan tidak optimal. Untuk mengurangi atau mencegah kegagalan pada Dump Truck HD785-7 perlu menerapkan suatu perbaikan dalam pengoprasian dan maintenance yang baik. Metode yang digunakan untuk mengatasi performa unit produksi yang kurang baik adalah metode pareto, Failure Mode and Effect Analyis (FMEA) dan Systematic Cause Analysis Technique (SCAT). Dengan metode pareto untuk membuat grafik batang berdasarkan urutan banyaknya jumlah kejadian. Metode FMEA kegagalan yang terjadi dapat diidentifikasiikan untuk dibuat prioritas pengendaliannya. Metode SCAT untuk dapat menganalisa sistem kegagalan dari gabungan beberapa sub-sistem, level yang dibawahnya dan untuk mengetahui kegagalan komponen. Dari hasil pengolahan data diketahui 3 kerusakan yang memiliki pengaruh terbesar terhadap performa unit yaitu kerusakan error 03 low power dengan RPN 360, kerusakan work lamp problem dengan RPN 216 dan kerusakan engine can’t start dengan RPN 189. Indonesian Society of Applied Science 2024-02-02 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/793 10.52158/jamere.v4i1.793 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 1: February 2024; 28-34 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 1: February 2024; 28-34 2775-1031 10.52158/jamere.v4i1 eng https://journal.isas.or.id/index.php/JAMERE/article/view/793/266 Copyright (c) 2024 Darsini Darsini, Galih Susanto

oai:ojs2.journal.isas.or.id:article/816 2024-11-23T00:29:17Z JAMERE:ART driver

Pengaruh Komposisi Katalis pada Pembuatan Komposit Sebagai Aplikasi untuk Body Kontes Mobil Hemat Energi (KMHE) Hamid, Abdul Ali Zainal Abidin, Muhammad Annafiyah, Annafiyah Dayi Febriana, Ike Miftahatul Ilmah, Aurista Abdullah, Mohammad Hamid, Abdul Ali Zainal Abidin, Muhammad Annafiyah, Annafiyah Dayi Febriana, Ike Miftahatul Ilmah, Aurista Abdullah, Mohammad Composite, Catalyst, Energy Efficient Car Contest, Fiberglass Komposit Katalis Kontes Mobil Hemat Energi Fiberglass A strong and light body shape is an important factor in the Energy Saving Car Contest. The shape and material of the body used affects the speed of the car. Composite materials are often chosen as material for making Energy Saving Car Contest bodies, because they are strong, light and have a fiber structure that binds each other. So this research aims to determine the effect of variations in catalyst composition on composite materials using fiberglass, woven roving and resin to obtain optimum composite results. Variations in the composition of the catalyst used are 1; 1.5; 2 and 2.5 %. Based on the results of the tests that have been carried out, tensile test results were obtained with the highest results, namely for 2.5% catalyst composition variation of 72.23 MPa and the lowest value was 27.1 MPa for a 1% catalyst composition. The greater the catalyst composition causes the tensile strength value to increase. The highest max force and modulus of elasticity test results were obtained with a 2% variation in catalyst composition, namely 7217 MPa and 16.30 MPa. Meanwhile, the highest impact test results obtained were 10.65 Joules with a catalyst variation of 1.5%.. Bentuk body yang kuat dan ringan menjadi faktor penting pada ajang Kontes Mobil Hemat Energi (KMHE).  Bentuk dan material pada body yang digunakan mempengaruhi kecepatan mobil. Bahan komposit banyak dipilih sebagai material pembuatan body KMHE, karena  sifatnya yang kuat, ringan dan memiliki struktur serat yang saling mengikat. Sehingga pada penelitian ini bertujuan untuk mengetahui pengaruh variasi komposisi katalis pada material komposit menggunakan fiberglass, woven roving dan resin untuk mendapatkan hasil komposit yang optimum. Variasi komposisi katalis yang digunakan yaitu sbesar 1; 1,5; 2 dan 2,5 %.  Berdasarkan hasil pengujian yang telah dilakukan diperoleh hasil pengujian tarik dengan hasil tertinggi yaitu pada variasi komposisi katalis 2,5% sebesar 72,23 MPa dan nilai paling rendah 27,1 MPa untuk komposisi katalis 1%. Semakin besar komposisi katalis menyebabkan nilai kekuatan tarik semakin meningkat. Hasil pengujian max force dan modulus elastisitas  tertinggi diperoleh pada variasi komposisi katalis 2% yaitu sebesar 7217 MPa dan 16,30 MPa. Sedangkan hasil pengujian impact tertinggi didapatkan nilai sebesar10,65 Joule dengan variasi katalis 1,5%. Indonesian Society of Applied Science 2024-05-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/816 10.52158/jamere.v4i2.816 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 2: August 2024; 10-14 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 2: August 2024; 10-14 2775-1031 10.52158/jamere.v4i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/816/290 Copyright (c) 2024 Abdul Hamid, Muhammad Ali Zainal Abidin, Annafiyah, Ike Dayi Febriana, Aurista Miftahatul Ilmah, Mohammad Abdullah

oai:ojs2.journal.isas.or.id:article/821 2024-11-23T00:29:17Z JAMERE:ART driver

Analisis Persebaran Panas Pada Mesin Oven Pengering Kerupuk Dengan Burner Sederhana Berbasis Computational Fluid Dynamics Analisis Persebaran Panas Pada Mesin Oven Pengering Kerupuk Dengan Burner Sederhana Berbasis Computational Fluid Dynamics Adetia Riski Wardana Mukhtar, Agus Burhanuddin, Aan Mukhtar, Agus Burhanuddin, Aan Cracker drying oven machine, heat distribution, computational fluid dynamics Mesin oven pengering kerupuk, persebaran panas, computational fluid dynamic The main problems in drying crackers are non-uniform drying and drying that still uses solar energy. During the rainy season, the process of drying crackers cannot be done quickly or takes a long time, thereby reducing the amount of cracker production in cracker MSMEs. Therefore, the solution that can be used is to use simple technology, a cracker drying oven machine, which can help the productivity of cracker small businesses in the drying process when the rainy season arrives. This research aims to determine the heat distribution in the cracker drying oven box using Computational Fluid Dynamics, determine the optimal temperature for drying crackers using a cracker drying oven machine and find out how long it takes to dry crackers using a cracker drying oven machine. From the simulation results using Ansys Fluent 19.2 software, it was found that the heat distribution was almost even in the drying box on each shelf with a heating source inlet of 75 ˚C with a temperature range of 49 ˚C - 54 ˚C on each shelf in stages. From the direct experimental results, it was found that the drying process with a heating source of 75 ˚C resulted in a decrease in the weight of crackers from the initial unit weight of 6 grams and the final unit weight of crackers of 3 grams. The drying process with a cracker drying oven machine lasts for 3 hours to achieve complete drying. Keywords: Cracker drying oven machine, heat distribution, computational fluid dynamics Permasalahan utama dalam pengeringan kerupuk adalah pengeringan yang tidak seragam serta pengeringan yang masih menggunakan tenaga panas matahari. Pada musim penghujan proses pengeringan kerupuk tidak bisa dilakukan secara cepat atau berlangsung lama sehingga mengurangi jumlah produksi kerupuk pada UMKM kerupuk. Maka dari itu solusi yang bisa digunakan yaitu menggunakan teknologi secara sederhana mesin oven pengering kerupuk yang dapat membantu produktivitas umkm kerupuk dalam proses pengeringan disaat musim penghujan tiba. Penelitian ini bertujuan mengetahui sebaran panas di dalam box oven pengering kerupuk dengan Computaional Fluid Dynamics, mengetahui temperatur optimal untuk mengeringkan kerupuk dengan mesin oven pengering kerupuk dan mengetahui berapa lama waktu yang dibutuhkan untuk mengeringkan kerupuk menggunakan mesin oven pengering kerupuk. Dari hasil simulasi menggunakan software ansys fluent 19.2 didapat persebaran panas hampir merata di dalam box pengering setiap rak dengan inlet sumber pemanas 75 ˚C dengan rentang suhu 49 ˚C - 54 ˚C di setiap rak secara bertingkat. Dari hasil percobaan langsung didapat proses pengeringan dengan sumber pemanas 75 ˚C menghasilkan penurunan berat kerupuk dari berat satuan awal sebesar 6 gr dan berat satuan akhir kerupuk sebesar 3 gr. Proses pengeringan dengan mesin oven pengering kerupuk berlangsung selama 3 jam untuk mencapai kering dengan sempurna.   Kata kunci: Mesin oven pengering kerupuk, persebaran panas, computational fluid dynamic Indonesian Society of Applied Science 2024-05-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/821 10.52158/jamere.v4i2.821 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 2: August 2024; 15-24 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 2: August 2024; 15-24 2775-1031 10.52158/jamere.v4i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/821/292 Copyright (c) 2024 Adetia Riski Wardana, Agus Mukhtar,Aan Burhanuddin

oai:ojs2.journal.isas.or.id:article/837 2024-11-23T00:29:17Z JAMERE:ART driver

Analysis Of The Utilization Of Biobriquettes From Coffee Waste As A Basis For Renewable Energy Development: A Review Article Analisis Pemanfaatan Biobriket Dari Limbah Kulit Kopi Sebagai Basis Pengembangan Energi Terbarukan: Artikel Review Sri Aulia Noprianti, Nadia Hamdi, Hamdi Yendri Sudiar, Nofi Sri Aulia Noprianti, Nadia Hamdi, Hamdi Yendri Sudiar, Nofi Biobriquettes, Coffee Waste, Calorific Value, Renewable Fuel Biobriket, Limbah Kopi, Nilai Kalor, Bahan Bakar Terbarukan This review article aims to explore various techniques used in the production of biobriquettes from coffee skin waste with a variety of materials and methods. Based on the literature study conducted, several studies were found related to the production of biobriquettes from coffee waste using various methods such as briquetting, torefaction, and experimental methods. The main raw materials used include coffee grounds, coffee skin, paper, and sawdust. The adhesives used were tapioca flour, pine resin, and biotany flour. The results showed that the calorific value of the biobriquettes produced ranged from 3489-8180 calories/gram, with the highest value produced by certain composition variations. The biobriquettes produced generally meet SNI standards as an alternative fuel. This article is expected to provide a comparison between various methods and compositions in producing quality biobriquettes from coffee waste. Artikel review ini bertujuan untuk mengeksplorasi berbagai teknik yang digunakan dalam produksi biobriket dari limbah kulit kopi dengan variasi bahan dan metode. Berdasarkan studi literatur yang dilakukan, ditemukan beberapa penelitian terkait pembuatan biobriket dari limbah kopi dengan menggunakan berbagai metode seperti metode pembriketan, torefaksi, serta eksperimen. Bahan baku utama yang digunakan antara lain ampas kopi, kulit kopi, kertas, dan serbuk kayu. Adapun perekat yang digunakan berupa tepung tapioka, getah pinus, dan tepung biotani. Hasil penelitian menunjukkan bahwa nilai kalori biobriket yang dihasilkan berkisar antara 3489-8180 kalori/gram, dengan nilai tertinggi dihasilkan oleh variasi komposisi tertentu. Biobriket yang dihasilkan secara umum memenuhi standar SNI sebagai bahan bakar alternatif. Artikel ini diharapkan dapat memberikan perbandingan antara berbagai metode dan komposisi dalam memproduksi biobriket berkualitas dari limbah kopi. Indonesian Society of Applied Science 2024-05-21 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/837 10.52158/jamere.v4i2.837 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 2: August 2024; 1-9 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 2: August 2024; 1-9 2775-1031 10.52158/jamere.v4i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/837/289 Copyright (c) 2024 Nadia Sri Aulia Noprianti, Hamdi Hamdi, Nofi Yendri Sudiar

oai:ojs2.journal.isas.or.id:article/844 2024-11-23T00:29:17Z JAMERE:ART driver

Pengaruh Kuat Arus Dan Variasi Sudut Kampuh Pengelasan SMAW Pada Sambungan Pelat Baja AISI E 2512 Terhadap Ketangguhan Serta Uji Anova Pengaruh Kuat Arus Dan Variasi Sudut Kampuh Pengelasan SMAW Pada Sambungan Pelat Baja AISI E 2512 Terhadap Ketangguhan Serta Uji Anova Suwarto Tato, Markus Mangando, Mangando Tandilittin, Harsman Tato, Markus Mangando, Mangando Tandilittin, Harsman SMAW welding, current, seam type, toughness, Anova. Pengelasan SMAW, Arus, jenis kampuh, Ketangguhan, Anova. Welding is a process of joining two metals where the metals become one due to heat with or without pressure. In this research, the welding process was carried out using a SMAW (Shield Metal Arc Welding) welding machine or electric arc welding using wrapped electrodes to determine the effect of seam type and current on toughness as well as an anova test. The base metal used is AISI E 2512 steel. The welding variables chosen are seam angles 600, 700, and 800, while the current variables used are 100A, 90A and 80A, then impact testing and anova tests are carried out. From the research results obtained. The highest impact strength is at a seam angle of 800 and a current of 100A, namely 1,802 joules/mm2, for the 700 seam angle group, the highest tensile strength value is 1,793 joules/mm2, while the lowest value is at a seam angle of 600, a current of 80A is 1,717 joules/mm2 and at Anova test shows that the mechanical properties of the weld will depend on the shape of the weld and the current chosen, so the seam angle and current strength have a significant influence on the impact strength or toughness of the steel.. Pengelasan adalah suatu proses penyambungan dua logam dimana logam menjadi satu akibat adanya panas dengan atau tanpa tekanan. Dalam penelitian ini dilakukan proses pengelasan menggunakan mesin las SMAW (Shield Metal Arc Welding) atau las busur listrik menggunakan elektroda terbungkus untuk mengetahui pengaruh jenis kampuh dan arus terhadap ketangguhan serta uji anova. Logam induk yang dipakai adalah jenis baja AISI E 2512. Variabel pengelasan yang dipilih adalah sudut kampuh 600, 700, dan 800, sedangkan variabel arus yang digunakan adalah 100A,90A dan 80A kemudian dilakukan pengujian impak dan uji anova. Dari hasil penelitian diperoleh. kekuatan impak tertinggi terdapat pada sudut kampuh 800 dan arus 100A yaitu sebesar 1,802 joule/mm2,untuk kelompok sudut kampuh 700 nilai kekuatan tarik yang tertinggi sebesar 1,793 joule/mm2, sedangkan nilai terendah pada sudut kampuh 600 arus 80A sebesar 1,717 joule/mm2 dan Pada uji uji anova bahwa Sifat mekanis hasil las akan tergantung pada bentuk kampuh dan arus yang dipilih, jadi sudut kampuh dan kuat arus mempunyai pengaruh yang signifikan terhadap kekuatan impak atau ketangguhan pada baja Indonesian Society of Applied Science 2024-06-13 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/844 10.52158/jamere.v4i2.844 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 2: August 2024; 25-31 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 2: August 2024; 25-31 2775-1031 10.52158/jamere.v4i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/844/294 Copyright (c) 2024 Markus Tato, Mangando, Suwarto, Harsman Tandilittin

oai:ojs2.journal.isas.or.id:article/845 2024-11-23T00:29:17Z JAMERE:ART driver

Pengaruh Temperatur Temperring Pada Proses Heat Treatment Baja ST 60 Dengan Media Pendingin Oli Terhadap Kekerasan Dan Struktur Mikro Pengaruh Temperatur Temperring Pada Proses Heat Treatment Baja ST 60 Dengan Media Pendingin Oli Terhadap Kekerasan Dan Struktur Mikro Wajilan, Wajilan Hariyanto, Agus Suwarto, Suwarto Wajilan, Wajilan Hariyanto, Agus Suwarto, Suwarto Hardening, Tempering, Quenching,. Hardness, Tensile strength, Steel ST.60 Hardening, Tempering, Quenching, kekerasan, Kekuatan tarik, Baja ST.60. Steel that has been hardened is brittle and not suitable for use. Through the tempering process, the hardness and brittleness can be reduced until it meets the requirements for use. Hardness decreases, tensile strength will also decrease while the ductility and toughness of steel will increase. This research aims to determine the effect of tempering temperature in the heat treatment process of ST 60 steel with oil cooling media on hardness distribution and microstructure. The tempering process is carried out at temperatures of 500°C, 400°C, and 300°C with a hardening temperature of 950°C using Mesran SAE 40 Oil Quenching. The method used in this research is experimental research for the specimen is ST 60. The composition test results show that the material The base is included in the medium carbon steel group or medium carbon steel with a carbon content of 0.452%. Hardness testing used a Micro Hardness Tester where the hardness of the tempered specimen was 255.5, and the hardness of the hardened specimen was 189.7 which decreased. Microstructure testing shows that the microstructure of the raw material consists of ferrite and pearlite with balanced crystal shape and size according to the carbon content of 0.452 Baja yang telah dikeraskan bersifat rapuh dan tidak cocok untuk digunakan, melalui proses tempering kekerasan dan kerapuhan dapat diturunkan sampai memenuhi persyaratan penggunaan. Kekerasan turun, kekuatan tarik akan turun pula sedang keuletan dan ketangguhan baja akan meningkat. Penelitian ini bertujuan untuk mengetahui pengaruh suhu Tempering pada proses heat treatment baja ST 60 dengan media pendingin Oli terhadap distribusi kekerasaan dan struktur mikro. Proses temper dilakukan pada suhu 500°C, 400°C, dan 300°C dengan temperatur hardening 950°C menggunakan Quenching Oli Mesran SAE 40. Metode yang digunakan pada penelitian ini adalah penelitian eksperimental untuk spesimen adalah ST 60. Hasil uji komposisi menunjukkan material dasar termasuk dalam golongan medium carbon steel atau baja karbon menengah dengan kandungan carbon 0,452%. Pengujian kekerasan menggunakan Mikro Hardness Tester dimana kekerasan spesimen temper yang sebesar 255,5, dan kekerasan spesimen hardening sebesar 189,7 mengalami penurunan. Pengujian struktur mikro menunjukkan struktur mikro raw material terdiri dari ferit dan perlit dengan bentuk dan ukuran kristal yang berimbang sesuai dengan kandungan karbon 0,452 Indonesian Society of Applied Science 2024-06-17 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/845 10.52158/jamere.v4i2.845 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 2: August 2024; 32-37 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 2: August 2024; 32-37 2775-1031 10.52158/jamere.v4i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/845/302 Copyright (c) 2024 Agus Hariyanto, Suwarto, Wajilan

oai:ojs2.journal.isas.or.id:article/892 2024-11-23T00:29:28Z JAMERE:ART driver

Pengaruh Variasi Arus Pengelasan SMAW (60, 80 Ampere) Terhadap Kekerasan Logam Las Dan Haz Material Baja ST 37) Pengaruh Variasi Arus Pengelasan SMAW (60, 80 Ampere) Terhadap Kekerasan Logam Las Dan Haz Material Baja ST 37) Hestukoro, Soni B.H. Sitorus, Melvin Salman , Aulia B.H. Sitorus, Melvin Salman , Aulia SMAW Welding, Low Carbon Steel, Hardness Test Method Rockwell Pengelasan SMAW, Baja Karbon Rendah, Uji Kekerasan Metode Rockwell This research aims to determine the effect of welding current on the hardness of weld metal and HAZ (heat affected zone) metal which is tested for hardness using the Rockwell method. This research was carried out on ST 37 low carbon steel material which was welded using an E6013 electrode with a diameter of 2.6 mm with a butt joint, then given different welding currents, namely 60, 80, Ampere. For the raw hardness of the low carbon steel material, the average figures were obtained. the average is 48.35 HRB. Specimens that were welded with a current of 60 Ampere had an average weld metal hardness figure of 46.85 HRB and a HAZ of 49.15 HRB. For specimens that were given a welding current of 80 Ampere, the average hardness of the weld metal obtained was 47.05 HRB and the HAZ was 50.3 HRB. The test results show that the increase in hardness numbers in both the weld metal and the HAZ metal is directly proportional to the amount of current used when welding Penelitian ini bertujuan untuk mengetahui pengaruh arus pengelasan terhadap kekerasan logam las dan logam HAZ (heat Affected Zone) yang diuji kekerasan menggunakan metode Rockwell. Penelitian ini dilakukan pada material baja karbon rendah ST 37 yang dilas menggunakan elektroda E6013 diameter 2,6 mm dengan sambungan tumpul, kemudian diberikan arus pengelasan yang berbeda-beda yaitu 60, 80, Ampere.Untuk kekerasan raw material baja karbon rendah didapat angka rata-rata yaitu 48,35 HRB. Spesimen yang dilas dengan arus 60 Ampere angka kekerasan logam lasan rata-rata 46,85 HRB dan HAZ 49,15 HRB. Untuk spesimen yang diberi arus pengelasan 80 Ampere angka rata-rata kekerasan logam las yang diperoleh yaitu 47,05 HRB dan HAZ 50,3 HRB. Dari hasil pengujian tersebut menunjukan, bahwa kenaikan angka kekerasan baik pada logam las (weld metal) maupun pada logam HAZ berbanding lurus dengan besar arus yang digunakan pada saat mengelas. Indonesian Society of Applied Science 2024-02-02 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/892 10.52158/jamere.v4i1.892 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 1: February 2024; 35-39 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 1: February 2024; 35-39 2775-1031 10.52158/jamere.v4i1 eng https://journal.isas.or.id/index.php/JAMERE/article/view/892/303 Copyright (c) 2024 Soni Hestukoro, Melvin B.H. Sitorus, Aulia Salman

oai:ojs2.journal.isas.or.id:article/899 2024-11-23T00:29:17Z JAMERE:ART driver

Prediction of Airflow Velocity in Wind Tunnel Test Section Based on Blade Pitch Angle English Maryani Pandiangan, Windy Sugianto, Sugianto Masruri, Deden Maryani Pandiangan, Windy Sugianto, Sugianto Masruri, Deden wind tunnel, fluid computation, fan simulation, moving reference frame, test section English This study was conducted in an open-circuit subsonic wind tunnel at the Aeronautics Hangar of Bandung State Polytechnic with the aim of obtaining the airflow velocity distribution in the test section and determining the blade pitch angle configuration that produces the greatest velocity. The wind tunnel has a total length of about 6 m with an octagonal test section measuring 40 cm x 40 cm x 155 cm and 7 cm chamfers at each corner. The research method involved numerical simulation using ANSYS and 3D modeling with Solidworks. Simulations were conducted at 500 RPM with blade pitch angles of 40°, 50°, 60°, and 70°. The results showed the highest speed at 50° blade pitch angle (16 - 18 m/s), with the lowest speed at 70° blade pitch angle (9 - 13 m/s). Tests at a blade pitch angle of 50° with variations in fan rotational speed (300 RPM, 500 RPM, and 700 RPM) also showed similar speeds (16.2 m/s at 500 RPM). It was found that the 50° blade pitch angle produced significant vortex strength which was influenced by the high airflow velocity. During the test, to improve the accuracy of airflow velocity measurement, it is necessary to ensure that all parts of the wind tunnel are closed. Indonesian Society of Applied Science 2024-07-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/899 10.52158/jamere.v4i2.899 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 2: August 2024; 38-45 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 2: August 2024; 38-45 2775-1031 10.52158/jamere.v4i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/899/311 Copyright (c) 2024 Windy Maryani Pandiangan, Sugianto, Deden Masruri

oai:ojs2.journal.isas.or.id:article/914 2024-11-23T00:40:03Z JAMERE:ART driver

Airflow Velocity Measurement Of Turbular Test Section Based On Rpm Setting Configuration In Open Circuit Subsonic Wind Tunnel Syifa Fauziah Rahmani, Nanda Sugianto, Sugianto Masruri, Deden Syifa Fauziah Rahmani, Nanda Sugianto, Sugianto Masruri, Deden wind tunnel, fluid computation, fan simulation, moving reference frame, test section. Speed measurements in the test section based on the RPM setting configuration of the open-type subsonic wind tunnel with a turbular test section to obtain the properties of the airflow in the test section based on the RPM setting configuration in the open-type subsonic wind tunnel. The simulation process is carried out using software Computational Fluid Dynamics (CFD) , ANSYS Fluent. The simulation process is carried out by the method Moving Reference Frame (MRF) that the fluid phenomenon is moved to move the fan in the wind tunnel to obtain airflow properties in the turbular test section, open-type subsonic wind tunnel. In the testing process, airflow velocity measurements were carried out in the turbular test section of the open-type subsonic wind tunnel using an air velocity measuring instrument, namely anemometer and hotwire. The software Computer Aided Design (CAD), Solidworks, serves to create the geometry of the open-type subsonic wind tunnel and has a turbular test section inspired by the Didacta Italia PN21 D open-type subsonic wind tunnel. The properties that occur in the test section based on the configuration of the RPM setting in the open-type subsonic wind tunnel turbular test section are expected to achieve results to obtain the value of the velocity distribution, pressure distribution and turbulence intensity value so that it is useful and supports the operation and testing process to be carried out in an open-type subsonic wind tunnel with a turbular test section. Indonesian Society of Applied Science 2024-07-25 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/914 10.52158/jamere.v4i2.914 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 2: August 2024; 46-54 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 2: August 2024; 46-54 2775-1031 10.52158/jamere.v4i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/914/315 Copyright (c) 2024 Nanda Syifa Fauziah Rahmani, Sugianto, Deden Masruri

oai:ojs2.journal.isas.or.id:article/922 2025-08-02T02:48:52Z JAMERE:ART driver

Perancangan Mesin Pengolah Sampah Plastik Jenis Polyehthylene Terephthalate (PET) Menjadi Biji Plastik Dengan Metode Ekstrusi Perancangan Mesin Pengolah Sampah Plastik Jenis Polyehthylene Terephthalate (PET) Menjadi Biji Plastik Dengan Metode Ekstrusi Ihda Alwan, Muhammad Eka Septiyani Arifin, Devi Yuni Widiatmoko, Rudy Ihda Alwan, Muhammad Eka Septiyani Arifin, Devi Yuni Widiatmoko, Rudy Plastic Extrusion, Design, PET Waste, Plastic Seeds, Waste treatment Ekstrusi Plastik, Perancangan, Limbah PET, Biji Plastik, Pengolahan Limbah A plastic extrusion machine is a tool that can be used to process plastic waste into plastic pellets which can be reused to produce plastic products. Therefore, learning and applying these tools is useful for reprocessing plastic waste which is currently increasing. However, it is a shame that the tools currently on the market are relatively uneconomical for institutional scale processing, because the majority of tools on the market are intended for industrial scale. The output of this design produces a prototype tool with dimensions of 1005x350x830 mm and a capacity of 376 grams/hour. Maximum total energy consumption is less than 1 kW. The design of this plastic extrusion machine uses a screw conveyor, a 200Watt band heater and has 2 functions in 1 machine. The first function is to extrude chopped PET plastic and the second function is to cut the extrusion product so that the output of this machine is plastic pellets. Mesin ekstrusi plastik merupakan salah satu alat yang dapat dimanfaatkan untuk pengolahan limbah plastik menjadi biji plastik yang dapat digunakan kembali dalam menghasilkan produk berbahan plastik. Oleh karena itu, pembelajaran serta pengaplikasian terkait alat tersebut berguna untuk mengolah kembali sampah plastik yang saat ini sedang meningkat. Namu disayangkan alat-alat yang beredar di pasaran saat ini relatif tidak ekonomis untuk pengolahan skala institusi, dikarenakan mayoritas alat yang beredar di pasaran di tunjukan untuk skala industri. Hasil luaran dari perancangan ini menghasilkan prototipe alat dengan dimensi 1005x350x830 mm dan berkapasitas 376gram/jam. Total konsumsi energi maksimal kurang dari 1 kW. Rancangan mesin ekstrusi plastik ini menggunakan screw conveyor, band heater berdaya 200Watt dan memiliki 2 fungsi pada 1 mesin fungsi pertama ekstrusi cacahan plastik PET dan untuk fungsi kedua memotong hasil ekstrusi sehingga luaran dari mesin ini berupa biji plastik berbentuk pelet. Indonesian Society of Applied Science 2025-08-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/922 10.52158/jamere.v5i2.922 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 5 No. 2 (2025); 69-76 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 5 No 2 (2025); 69-76 2775-1031 10.52158/jamere.v5i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/922/414 Copyright (c) 2025 Devi Eka Septiyani Arifin, Rudy Yuni Widiatmoko, Muhammad Ihda Alwan

oai:ojs2.journal.isas.or.id:article/925 2024-11-23T00:29:17Z JAMERE:ART driver

Study of the Effect of Machining Parameter Variations on the Surface Roughness of AISI 1045 Steel Track Link Pins Studi Pengaruh Variasi Parameter Pemesinan Terhadap Kekasaran Permukaan Pin Track Link Baja AISI 1045 Wilujeng, Auliana Angriawan, Bayu Anas Fikri, Mohammad Wilujeng, Auliana Angriawan, Bayu Anas Fikri, Mohammad excavator roughness pin track link undercarriage excavator kekasaran pin track link undercarriage The track link pin is an important part of the excavator undercarriage which often experiences wear due to continuous friction. Excessive load is often the cause of increased track link pin wear. Therefore, this research makes a replacement material for AISI 1045 steel excavator track link pins by varying the machining parameters using the Taguchi method. In this research, track link pins were made using a conventional lathe. The manufacturing process is carried out by varying nine combinations of machining parameters, namely cutting depth (a), cutting speed (Cs), and feed motion (f). Each parameter is organized into three factor levels. Determination of the variation values ​​of these parameters is carried out based on the maximum limit conditions of the machine and the specifications of the tools used. The research results show that there is an influence of machining parameters on surface roughness. The surface roughness of the original material of the track link pin is N9. Of the nine levels of machining parameter combinations, there is one combination that produces a surface roughness of N8 (NOT GOOD), so that 88.89% of this research is rated GOOD. Pin track link merupakan salah satu bagian penting pada undercarriage excavator yang sering mengalami keausan akibat adanya gesekan terus menerus. Beban berlebih seringkali menjadi penyebab meningkatnya keausan pin track link. Oleh karena itu, penelitian ini membuat material pengganti pin track link excavator baja AISI 1045 dengan memvariasikan parameter pemesinan dengan metode Taguchi. Pada penelitian ini, pembuatan pin track link menggunakan mesin bubut konvensional. Proses manufaktur dilakukan dengan memvariasikan sembilan kombinasi parameter pemesinan, yaitu kedalaman potong (a), kecepatan potong (Cs), dan gerak makan (f). Masing-masing parameter diatur dalam tiga level faktor. Penentuan nilai variasi dari parameter tersebut dilakukan berdasarkan kondisi batas maksimum dari mesin dan spesifikasi tools yang digunakan. Hasil penelitian menunjukkan adanya pengaruh dari parameter pemesinan terhadap kekasaran permukaan. Kekasaran permukaan material asli pin track link adalah N9. Dari sembilan level kombinasi parameter pemesinan, terdapat satu kombinasi yang menghasilkan kekasaran permukaan N8 (NOT GOOD), sehingga 88,89% penelitian ini dinilai GOOD Indonesian Society of Applied Science 2024-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/925 10.52158/jamere.v4i2.925 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 2: August 2024; 62-66 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 2: August 2024; 62-66 2775-1031 10.52158/jamere.v4i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/925/314 Copyright (c) 2024 Auliana Diah Wilujeng, Bayu Angriawan, Mohammad Anas Fikri

oai:ojs2.journal.isas.or.id:article/926 2024-11-23T00:29:17Z JAMERE:ART driver

Design of a Water Tower Building in a Sea Water Reverse Osmosis System Perancangan Bangunan Menara Air pada Sistem Sea Water Reverse Osmosis Imanto, Frenki Wilujeng, Auliana Fatah, Misbakhul Hamid, Abdul Wijaya, Septian Imanto, Frenki Wilujeng, Auliana Fatah, Misbakhul Hamid, Abdul Wijaya, Septian Water tower building Frame sea water reverse osmosis bangunan menara air rangka sea water reverse osmosis Water tower buildings using the SWRO (Sea Water Reverse Osmosis) system are needed as part of processing sea water into clean water. So that it can be used by the local community to meet their daily needs. In this research we designed a water building in the SWRO system by analyzing it using the FEM method. The upper frame is made from gray cast ATM A48 material with grade 25 with a C channel type profile measuring 80x8 mm. Meanwhile, the supporting frame is made of gray cast ATM A48 material with grade 25 with an L type profile with dimensions of 40x40x3 mm and 30x30x3 mm. The largest stress load stimulation was obtained at 415.8 MPa on the upper frame, which indicates it is in the safe category. Meanwhile, the largest displacement value was 60.46 mm for the upper frame. This shows that the design of water structures in the SWRO system in this research can be classified as safe. Bangunan menara air pada sistem SWRO (Sea Water Reverse Osmosis) diperlukan sebagai bagian dari pengolahan air laut menjadi air bersih. Sehingga dapat dimanfaatkan bagi masyarakat sekitar untuk memenuhi kebutuhan sehari-hari. Pada penelitian ini kami merancang bangunan air pada sistem SWRO dengan menganalisis menggunakan metode FEM. Pada rangka bagian atas terbuat dari bahan gray cast ATM A48 dengan grade 25 dengan bentuk profil tipe kanal C ukuran 80x8 mm. Sedangkan rangka bagian penyangga dari bahan gray cast ATM A48 dengan grade 25 dengan bentuk profil tipe L dengan ukuran 40x40x3 mm dan 30x30x3 mm. Stimulasi beban tegangan terbesar diperoleh sebesar 415,8 MPa pada rangka bagian atas yang mengindikasikan dalam kategori aman. Sedangkan untuk nilai Displacement terbesar diperoleh sebesar 60,46 mm pada rangka bagian atas. Hal ini menunjukkan bahwa perancangan bangunan air pada sistem SWRO pada penelitian ini dapat digolongkan sebagai kategori aman. Indonesian Society of Applied Science 2024-08-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/926 10.52158/jamere.v4i2.926 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 2: August 2024; 72-75 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 2: August 2024; 72-75 2775-1031 10.52158/jamere.v4i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/926/326 Copyright (c) 2024 Frenki Imanto, Auliana Diah Wilujeng, Misbakhul Fatah, Abdul Hamid, Septian Dwi Wijaya

oai:ojs2.journal.isas.or.id:article/927 2024-11-23T00:29:17Z JAMERE:ART driver

Studi Perbandingan Nilai Konduktivitas Termal Gypsum dan Sandwich Panel Sebagai Material Dinding Paint Dry Room Chandra Dwiaji, Yudhi Hazizah, Rizka Chandra Dwiaji, Yudhi Hazizah, Rizka paint dry room gypsum sandwich panel thermal conductivity PT. XYZ is a company engaged in manufacturing guitar musical instruments. One of the processes in making guitars is the process of painting the guitar body which aims to give color to the guitar body and protect the guitar body from damage to external elements. After the painting, the guitar body must be dried at a certain temperature to get a nice and shiny color result. To fulfill these results, a paint dry room is needed to maintain a room temperature of 42.1°C - 42.5°C, but also does not have a heat impact on the outdoor environment. Currently, there is no standard wall material that can be used as a paint dry room wall. This study uses an experimental method to determine the thermal conductivity of gypsum and sandwich panels, then calculates the thermal conductivity and simulates a comparison with the software. The calculation result based on the thermal conductivity formula is that gypsum has a thermal conductivity of 0.059 [W/m°C] and a sandwich panel thermal conductivity of 0.142 [W/m°C]. This proves that gypsum has better insulating properties than sandwich panels. This study found that gypsum walls are more profitable to be used as paint dry room wall materials. XYZ merupakan perusahaan yang bergerak di bidang manufaktur pembuatan alat musik gitar. Salah satu proses dalam pembuatan gitar adalah proses pengecatan body gitar yang bertujuan untuk memberikan warna pada body gitar dan melindungi body gitar dari kerusakan elemen luar. Setelah proses pengecatan, body gitar harus dikeringkan pada suhu tertentu untuk mendapatkan hasil warna yang bagus dan mengkilap. Untuk memenuhi hasil tersebut, diperlukan sebuah paint dry room yang mampu mempertahankan temperatur ruangan sebesar 42.1°C - 42.5°C, namun juga tidak memberikan dampak panas pada lingkungan di luar ruangan. Saat ini belum ada standar material dinding yang bisa digunakan sebagai dinding paint dry room. Penelitian ini menggunakan metode eksperimen untuk mengetahui konduktivitas termal gypsum dan panel sandwich, lalu dilakukan perhitungan konduktivitas termal dan simulasi perbandingan dengan software. Hasil perhitungan berdasarkan rumus konduktivitas termal adalah gypsum memiliki konduktivitas termal 0.059 [W/m°C] dan konduktivitas termal panel sandwich sebesar 0.142 [W/m°C]. Hal ini membuktikan bahwa gypsum memiliki sifat isolator yang lebih baik dibandingkan dengan panel sandwich. Dengan penelitian ini didapatkan hasil bahwa dinding gypsum lebih menguntungkan untuk dijadikan material dinding paint dry room. Indonesian Society of Applied Science 2024-07-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/927 10.52158/jamere.v4i2.927 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 2: August 2024; 55-61 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 2: August 2024; 55-61 2775-1031 10.52158/jamere.v4i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/927/313 Copyright (c) 2024 Rizka Hazizah, Yudhi Chandra Dwiaji

oai:ojs2.journal.isas.or.id:article/944 2024-11-23T00:29:17Z JAMERE:ART driver

Rancang Bangun Mesin Poles untuk Material Logam Rancang Bangun Mesin Poles untuk Material Logam Eka SeptiyaniArifin, Devi Afriansyah, Zidan Muliastri, Destri Azmy, Ilham Daniel Saragih, Albert Eka Septiyani Arifin, Devi Afriansyah, Zidan Muliastri, Destri Azmy, Ilham Daniel Saragih, Albert polishing machine, design, drive motor, steel material Mesin poles, perancangan, motor penggerak, material baja The polishing machine is widely used as an instrument to shine or smooth the surface of an object, one of which is a specimen before and after the electroplating process. The objects polished with this machine become shinier and perfectly clean. This research includes several stages: (1) Design, (2) calculation and component selection, (3) fabrication and assembly of components, and (4) functional testing of each component. The results showed that the polishing machine can function well according to standards. The polishing machine that has been made works using electrical energy from a 1 HP 1 Phase motor with a power of 0.75 kW and a rotational speed of 2800 Rpm. It was concluded that this polishing machine had succeeded in restoring function and performance with several aspects of change which increased tool performance. The results on steel material show that corroded steel can turn clean and shiny after the sanding process is carried out with the polishing machine. Mesin poles merupakan mesin yang banyak digunakan sebagai alat untuk mengkilatkan atau menghaluskan permukaan suatu benda kerja. Benda hasil dari kegiatan polishing  tersebut dapat berubah menjadi lebih  mengkilat dan bersih sempurna. Dalam proses penelitian ini teridiri dari beberapa tahapan yaitu (1) perancangan mesin, (2) perhitungan dan pemilihan komponen mesin, (3) pembuatan dan perakitan komponen, (4) Pengujian fungsional setiap komponen. Hasil dari pembuatan mesin menunjukan mesin poles dapat berfungsi dengan baik sesuai standar. Mesin poles yang telah dibuat bekerja dengan menggunakan energi listrik dari sebuah motor penggerak berukuran 1 Hp 1 Fasa dengan daya 0,75 kw dan memiliki kecepatan putar sebesar 2800 Rpm. Disimpulkan bahwa mesin poles ini ini telah berhasil mengembalikan fungsi kinerja serta performa dengan beberapa aspek perubahan yang menyebabkan adanya peningkatan performa alat. Hasil pengujian pada benda kerja material baja menunjukkan baja yang terkorosi dapat berubah menjadi bersih mengkilat setelah dilakukan proses pengamplasan dengan mesin poles tersebut. Indonesian Society of Applied Science 2024-08-09 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/944 10.52158/jamere.v4i2.944 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 4 No. 2: August 2024; 67-71 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 4 No 2: August 2024; 67-71 2775-1031 10.52158/jamere.v4i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/944/318 Copyright (c) 2024 Devi Eka Septiyani A, Zidan Afriansyah , Destri Muliastri, Ilham Azmy, Albert Daniel Saragih

oai:ojs2.journal.isas.or.id:article/974 2025-02-10T05:28:42Z JAMERE:ART driver

Transformasi Teknologi dalam Sel Surya Film Tipis Generasi Kedua Transformasi Teknologi dalam Sel Surya Film Tipis Generasi Kedua Susanto Gultom, Noto Nuri Nilam Sari, Putri Daniel Saragih, Albert Shania Anjani, Alena Dini Farhani, Arini Anandia Putri, Shakila Susanto Gultom, Noto Nuri Nilam Sari, Putri Daniel Saragih, Albert Shania Anjani, Alena Dini Farhani, Arini Anandia Putri, Shakila Silcon CdTe; CdS CIGS CZTS Second generation solar cell Silikon Amorf; CdTe; CdS,;CIGS;CZTS ;Sel Surya Generasi Kedua. Efficiency and cost are important points in the development of the renewable energy industry, especially solar cells. While the first generation of crystalline silicon-based solar cells had the biggest constraint in cost, the second generation of thin-film solar cells is trying to offer innovations with relatively lower cost but high flexibility compared to the first generation. This article explores the essential developments in the invention of second-generation thin-film solar cells, including materials, performance, and technology.  Through their respective fabrication processes, ultra-thin-film solar cells based on various materials such as amorphous silicon, Cadmium Telluride/Cadmium Sulfide (CdTe/CdS), and Copper Indium Gallium Selenide/Copper Zinc Tin Sulfide (CIGS/CZTS) were discovered. With these types of thin-film cells as well, the use of solar cells is more flexible for various applications mainly due to their lighter weight. Although the efficiency of their photovoltaic effect or light-to-electricity conversion is generally lower than that of crystalline silicon solar cells, these thin-film solar cells are efficient in absorbing light in dimmer conditions. Efisiensi dan biaya menjadi poin penting dalam perkembangan industri energi terbarukan, khususnya sel surya. Apabila generasi pertama yang berbasis silikon kristal memiliki kendala terbesar di biayanya, maka generasi kedua sel surya yang berbasis film tipis mencoba menawarkan inovasi dengan biaya yang relatif lebih rendah namun fleksibilitas tinggi dibandingkan generasi pertama. Artikel ini mengeksplorasi perkembangan esensial dalam penemuan sel surya film tipis generasi kedua, termasuk material, kinerja, dan teknologi.  Melalui proses fabrikasinya masing-masing, ditemukan sel surya dengan lapisan sangat tipis berbasiskan berbagai bahan seperti silikon amorf, Cadmium Telluride / Cadmium Sulfide (CdTe/CdS), dan Copper Indium Gallium Selenide / Copper Zinc Tin Sulfide (CIGS/CZTS). Dengan jenis sel film tipis ini juga, penggunaan sel surya lebih fleksibel untuk berbagai aplikasi terutama karena beratnya yang lebih ringan. Meskipun efisiensi efek fotovoltaik atau konversi cahaya menjadi listrik mereka umumnya lebih rendah daripada sel surya kristal silikon, sel surya film tipis ini efisien dalam menyerap cahaya di kondisi yang lebih redup. Indonesian Society of Applied Science 2025-02-04 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/974 10.52158/jamere.v5i1.974 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 5 No. 1: February 2025; 34-42 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 5 No 1: February 2025; 34-42 2775-1031 10.52158/jamere.v5i1 eng https://journal.isas.or.id/index.php/JAMERE/article/view/974/356 Copyright (c) 2025 Shakila Anandia Putri, Arini Dini Farhani, Alena Shania Anjani, Albert Daniel Saragih, Putri Nuri Nilam Sari, Noto Susanto Gultom

oai:ojs2.journal.isas.or.id:article/979 2025-02-10T05:28:42Z JAMERE:ART driver

Pengelolaan Operasional Water Treatment Sebagai Upaya Peningkatan Proses Pengolahan Air Sungai Pengelolaan Operasional Water Treatment Sebagai Upaya Peningkatan Proses Pengolahan Air Sungai Puja Widikda, Aris Mujayyin, Farid Puja Widikda, Aris Mujayyin, Farid water quality, treatment, operational management, maintenance, resource management Water sources such as rivers, lakes, and reservoirs often have quality issues, making them unsuitable for daily human use. Despite ongoing government and societal efforts to control waste and reduce pollution, water treatment remains critical to ensure its suitability for consumption. Effective water resource management requires specialized skills, including design, technical implementation, operational capabilities, and maintenance. Post-construction, water treatment projects frequently face issues such as substandard operations and inadequate maintenance. This study explores methods to enhance river water quality through improved operational management and maintenance. Key improvements involve regular equipment inspections, planned operations, and diligent maintenance control. Findings indicate that equipment performance is within acceptable ranges, with average motor vibration at 0.25, engine temperature at 49.3°C, and engine speed at 1230 rpm. Water quality after treatment shows a pH of 7.71 NTU, demonstrating that operational and maintenance standards are being met effectively. Sumber air seperti sungai, danau, dan waduk sering kali memiliki masalah kualitas, sehingga tidak cocok untuk digunakan sehari-hari oleh manusia. Meskipun upaya pemerintah dan masyarakat untuk mengendalikan limbah dan mengurangi polusi terus berlangsung, pengolahan air tetap penting untuk memastikan kelayakannya untuk dikonsumsi. Manajemen sumber daya air yang efektif memerlukan keterampilan khusus, termasuk desain, pelaksanaan teknis, kemampuan operasional, dan pemeliharaan. Setelah konstruksi, proyek pengolahan air sering menghadapi masalah seperti operasi yang tidak standar dan pemeliharaan yang tidak memadai. Penelitian ini mengeksplorasi metode untuk meningkatkan kualitas air sungai melalui manajemen operasional dan pemeliharaan yang lebih baik. Perbaikan kunci meliputi inspeksi peralatan secara berkala, operasi terencana, dan pengendalian pemeliharaan yang teliti. Temuan menunjukkan bahwa kinerja peralatan berada dalam rentang yang dapat diterima, dengan getaran motor rata-rata sebesar 0,25, suhu mesin 49,3°C, dan kecepatan mesin 1230 rpm. Kualitas air setelah pengolahan menunjukkan pH sebesar 7,71 NTU, yang menunjukkan bahwa standar operasional dan pemeliharaan telah terpenuhi dengan efektif. Indonesian Society of Applied Science 2025-02-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/979 10.52158/jamere.v5i1.979 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 5 No. 1: February 2025; 51-57 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 5 No 1: February 2025; 51-57 2775-1031 10.52158/jamere.v5i1 eng https://journal.isas.or.id/index.php/JAMERE/article/view/979/358 Copyright (c) 2025 Aris Puja Widikda, Farid Mujayyin

oai:ojs2.journal.isas.or.id:article/1022 2025-02-10T05:28:42Z JAMERE:ART driver

Analisis Crack Pada Robot Exoskeleton Lower LIMB Analisis Crack Pada Robot Exoskeleton Lower LIMB Pamungkas, Daniel Sutopo Fadhil Al Fadjri, Muhammad Widiastuti, Hanifah Pamungkas, Daniel Sutopo Fadhil Al Fadjri, Muhammad Widiastuti, Hanifah Robot Exoskeleton Tungkai Bawah, retak, SIF (Stress Intensity Factor) Failure due to material fatigue can be potentially fatal as it may lead to fractures without any initial detectable deformation. Factors such as high maximum load and large stress cycles accelerate the material fatigue process. In the design of a lower limb exoskeleton robot, the strength and safety of the robot are primary focuses, particularly in the Link Joint mechanism. The comfort and safety of the structure are determined by the geometry and type of material used. Analysis using Fracture Mechanics is employed to evaluate cracks in the Link Joint mechanical structure, with the calculation of the Stress Intensity Factor (SIF) value as an indicator of the stress intensity on the crack due to load. This research aims to identify critical stress and estimate the service life of the mechanism through testing using Finite Element Method-based software, specifically Solidworks 2020.   Kegagalan akibat kelelahan material dapat berpotensi fatal karena dapat menyebabkan fraktur tanpa deformasi awal yang terdeteksi. Faktor-faktor seperti beban maksimum yang tinggi dan siklus tegangan yang besar mempercepat proses kelelahan material. Dalam desain robot exoskeleton ekstremitas bawah, kekuatan dan keamanan robot menjadi fokus utama, terutama pada mekanisme Link Joint. Kenyamanan dan keamanan struktur ditentukan oleh geometri dan jenis material yang digunakan. Analisis menggunakan Fracture Mechanics digunakan untuk mengevaluasi retakan pada struktur mekanik Link Joint, dengan perhitungan nilai Stress Intensity Factor (SIF) sebagai indikator intensitas tegangan pada retakan akibat beban. Penelitian ini bertujuan untuk mengidentifikasi tegangan kritis dan memperkirakan umur layan mekanisme melalui pengujian dengan menggunakan perangkat lunak berbasis Metode Elemen Hingga, khususnya Solidworks 2020. Indonesian Society of Applied Science 2025-02-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1022 10.52158/jamere.v5i1.1022 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 5 No. 1: February 2025; 1-5 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 5 No 1: February 2025; 1-5 2775-1031 10.52158/jamere.v5i1 eng https://journal.isas.or.id/index.php/JAMERE/article/view/1022/351 Copyright (c) 2025 Muhammad Fadhil Al Fadjri, Daniel S Pamungkas, Hanifah Widiastuti

oai:ojs2.journal.isas.or.id:article/1062 2025-02-10T05:28:42Z JAMERE:ART driver

Analisis Uji Bending Pada Spesimen Serat Kulit Jagung Fiberglass Dengan Perpaduan Resin Lycal Menggunakan Variasi Metode Pembuatan Vacuum Bagging Dan Vacuum Infusion Analisis Uji Bending Pada Spesimen Serat Kulit Jagung Fiberglass Dengan Perpaduan Resin Lycal Menggunakan Variasi Metode Pembuatan Vacuum Bagging Dan Vacuum Infusion Setiawan, Ferry Amri, Chairul Suroso, Indreswari Anhar, Muh Setiawan, Ferry Amri, Chairul Suroso, Indreswari Anhar, Muh Serat Jagung, Fiberglass, Resin Lycal, Vacuum Infsuion, Vacuum Bagging, Uji Bending. This research aims to analyze the bending strength of composite materials based on corn fiber and fiberglass with Lycal resin, which are produced using two methods, namely vacuum bagging and vacuum infusion.Composite materials are increasingly being used in various industries because of their light and strong haracteristics. In this research, corn fiber was chosen as a natural reinforcement material because of its abundant availability and economic potential, while fiberglass was used as additional reinforcement to increase the strength of the material.The composite manufacturing process is carried out using two different methods, namely vacuum bagging and vacuum infusion, which are then tested using the ASTM-D 790 standard to determine the mechanical characteristics of the material, especially in terms of its ability to withstand bending loads. Apart from the bending test, material density calculations were also carried out to compare the weight and density of the two manufacturing methods.The test results show that the vacuum infusion method producescomposites with higher flexural strength than vacuum bagging. This is caused by a more even distribution of resin and minimal air trapped in the material structure during the vacuum infusion process. The composite produced from this method also has a lower density, making it lighter but still mechanically strong.It is hoped that this research can contribute to the development of natural fiber-based composite materials that are environmentally friendly and efficient, and have the potential to be applied to the aerospace industry, especially in the manufacture of UAV structures Penelitian ini bertujuan untuk menganalisis kekuatan lentur (bending strength) dari material komposit berbasis serat jagung dan fiberglass dengan resin Lycal, yang diproduksi menggunakan dua metode, yaitu vacuum bagging dan vacuum infusion. Material komposit semakin banyak digunakan di berbagai industri karena karakteristiknya yang ringan dan kuat. Dalam penelitian ini, serat jagung dipilih sebagai bahan penguat alami karena ketersediaannya yang melimpah dan potensi ekonomisnya, sementara fiberglass digunakan sebagai penguat tambahan untuk meningkatkan kekuatan material.Proses pembuatan komposit dilakukan dengan dua metode berbeda, yaitu vacuum bagging dan vacuum infusion, yang kemudian diuji menggunakan standar ASTM-D 790 untuk mengetahui karakteristik mekanis material, khususnya dalam hal kemampuan menahan beban lentur. Selain uji bending, dilakukan juga perhitungan densitas material untuk membandingkan berat dan kepadatan dari kedua metode pembuatan tersebut.Hasil pengujian menunjukkan bahwa metode vacuum infusion menghasilkan komposit dengan kekuatan lentur yang lebih tinggi dibandingkan vacuum bagging. Hal ini disebabkan oleh distribusi resin yang lebih merata dan minimnya udara yang terperangkap dalam struktur material pada proses vacuum infusion. Komposit yang dihasilkan dari metode ini juga memiliki densitas yang lebih rendah, menjadikannya lebih ringan namun tetap kuat secara mekanis.Penelitian ini diharapkan dapat memberikan kontribusi bagi pengembangan material komposit berbasis serat alami yang ramah lingkungan dan efisien, serta memiliki potensi untuk diterapkan pada industri dirgantara, khususnya dalam pembuatan struktur UAV. Indonesian Society of Applied Science 2025-02-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1062 10.52158/jamere.v5i1.1062 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 5 No. 1: February 2025; 27-33 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 5 No 1: February 2025; 27-33 2775-1031 10.52158/jamere.v5i1 eng https://journal.isas.or.id/index.php/JAMERE/article/view/1062/355 Copyright (c) 2025 Ferry Setiawan, Chairul Amri, Indreswari Suroso, Muh Anhar

oai:ojs2.journal.isas.or.id:article/1088 2025-02-10T05:28:42Z JAMERE:ART driver

Pengaruh Jenis Bahan Bakar Terhadap Emisi Gas Buang Injection Otto Engine System Pengaruh Jenis Bahan Bakar Terhadap Emisi Gas Buang Injection Otto Engine System Saksono , Puji Aji Sudikna, Bayu Ferdnian, Marsius N.S. Sidabutar, Sadat Saksono , Puji Aji Sudikna, Bayu Ferdnian, Marsius N.S. Sidabutar, Sadat Fuels type, Testing, Exhaust emission Jenis bahan bakar, Pengujian, Emisi gas buang The use of motorized vehicles currently experiences a very significant increase, this has an impact on increasing air pollution due to exhaust gas emissions from combustion. One of step to minimize the level of air pollution due to exhaust emissions is to choose the right fuel, so that the combustion in the combustion chamber is perfect. Based on this, a problem was formulated related to the influence of fuel’s type on exhaust gas emission values in vehicles with injection otto engine system technology. The research object is the 2017 Toyota Sienta 1.5 G M/T car using electronic fuel injection. The types of fuel used in this research are Pertalite, Pertamax, and Pertamax Turbo. The Test results from the use of Pertalite, Pertamax and Pertamax Turbo fuel types show that the exhaust gas emission values for CO, HC and CO2 content will decrease when the engine speed is higher. The best type of fuel from the test results is Pertamax Turbo RON 98, because almost all test results for CO, HC and CO2 content at various types of engine speed show the lowest results. In accordance with the Minister of Environment Regulation No.06 of 2006 concerning Exhaust Gas Emission Thresholds for Old Motor Vehicles, the vehicle tested was declared to have passed the exhaust emission test. Minister of Environment Regulation, 2006 determines the maximum threshold values for CO = 1.5% and HC = 200 ppm. Pemakaian kendaraan bermotor saat ini mengalami peningkatan yang sangat signifikan, hal ini berdampak pada meningkatnya pencemaran udara akibat emisi gas buang sisa hasil pembakaran. Salah satu langkah untuk meminimalisir tingkat pencemaran udara akibat emisi gas buang adalah dengan pemilihan bahan bakar yang tepat, sehingga pembakaran di dalam ruang bakar menjadi sempurna. Berdasarkan hal tersebut maka dirumuskan permasalahan terkait pengaruh jenis bahan bakar terhadap nilai emisi gas buang pada kendaraan berteknologi injection otto engine system. Obyek penelitian yaitu mobil Toyota Sienta 1.5 G M/T tahun pembuatan 2017 dengan menggunakan electronic fuel injection. Jenis bahan bakar yang digunakan dalam penelian ini yaitu Pertalite, Pertamax, dan Pertamax Turbo. Hasil pengujian dari pemakaian jenis bahan bakar Pertalite, Pertamax, dan Pertamax Turbo menunjukkan bahwa dari ketiganya didapat nilai emisi gas buang baik kandungan CO, HC dan CO2 akan mengalami penurunan saat putaran engine semakin tinggi. Jenis bahan bakar terbaik dari hasil pengujian adalah Pertamax Turbo RON 98, karena hampir pada semua hasil uji kandunan CO, HC, dan CO2 di berbagai jenis putaran engine menunjukkan hasil yang paling rendah. Sesuai dengan Peraturan Menteri Negara Lingkungan Hidup No.06 Tahun 2006 tentang Ambang Batas Emisi Gas Buang Kendaraan Bermotor Lama, maka kendaraan yang diuji ini dinyatakan lulus uji emisi gas buang. Peraturan Menteri Negara Lingkungan Hidup, 2006 menentukan nilai ambang batas maksimal CO = 1,5 % dan HC = 200 ppm. Indonesian Society of Applied Science 2025-02-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1088 10.52158/jamere.v5i1.1088 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 5 No. 1: February 2025; 43-50 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 5 No 1: February 2025; 43-50 2775-1031 10.52158/jamere.v5i1 eng https://journal.isas.or.id/index.php/JAMERE/article/view/1088/357 Copyright (c) 2025 Bayu Aji Sudikna, Puji Saksono, Marsius Ferdnian, Sadat N.S. Sidabutar

oai:ojs2.journal.isas.or.id:article/1097 2025-02-10T05:28:42Z JAMERE:ART driver

Pengaruh Jenis Pahat Terhadap Nilai Kekasaran Permukaan Material Baja Carbon S45C Pengaruh Jenis Pahat Terhadap Nilai Kekasaran Permukaan Material Baja Carbon S45C Maryanti, Budha Rezaldy, Rezaldy Joni Pasau, Fransye Maryanti, Budha Rezaldy, Rezaldy Joni Pasau, Fransye Variasi feeding, S45C, Pahat insert carbide, CNC, Nilai kekasaran permukaan In the turning process, the surface finish of a workpiece can influence the level of visual quality of a workpiece. CNC machine cutting parameters include feed speed, feed depth, and cutting speed. The aim of this research is to determine the effect of carbide insert tool types ZCC WNMG 060408 – DM and VBMT 160408 – HM on the average roughness value in the turning process with a rotational speed of 500 rpm and feed speed variations of 0.10 mm/rev, 0.15 mm/ rev and 0.20 mm/rev on S45C steel material. This research is located at PT. Bin Smeer Jaya with the research sample, namely S45C steel material. This research will be carried out with 3 samples of surface roughness testing each with varying feeding, where the turning process will be carried out on a CNC lathe machine first using ZCC WNMG 060408 – DM and VBMT 160408 – HM carbide insert chisels. The desired roughness standard is 1.8 µm – 2.2 µm. Based on the results of testing the surface roughness value of S45C steel material, the data obtained using the Handysurf E-35 surface roughness measurement tool, the roughness value using the ZCC WNMG 060408 – DM specimen 3 feeding 0.20 mm/rev carbide insert chisel was 2.38 µm, whereas for specimen 3 feeding 0.10 mm/rev is 4.11 µm. Then for the VBMT 160408 – HM carbide insert chisel, specimen 1 feeding 0.10 mm/rev is 1.48 µm, while for specimen 2 feeding 0.20 mm/rev it is 4.41 µm. So it can be concluded that the lowest roughness value occurs in the VBMT 160408 – HM carbide insert chisel compared to the ZCC WNMG 060408 – DM carbide insert chisel type. Therefore, the best level of surface roughness results occurs in the VBMT 160408 – HM carbide insert with the desired roughness standard and optimal visual quality Pada proses pembubutan, hasil permukaan suatu benda kerja dapat mempengaruhi tingkat kualitas visual suatu benda kerja. Parameter pemotongan mesin CNC meliputi kecepatan pemakanan, kedalaman pemakanan, dan kecepatan potong. Tujuan penelitian ini untuk mengetahui pengaruh jenis pahat insert carbide ZCC WNMG 060408 – DM dan VBMT 160408 – HM terhadap nilai rata-rata kekasaran pada proses pembubutan dengan kecepatan putar 500 rpm dan variasi kecepatan pemakanan 0,10 mm/rev, 0,15 mm/rev dan 0,20 mm/rev pada material baja S45C. Penelitian ini berlokasi di PT. Bin Smeer Jaya dengan sampel penelitian yaitu material baja S45C. Adapun penelitian ini akan dilakukan dengan masing-masing 3 sampel pengujian kekasaran permukaan dengan variasi feeding, dimana akan dilakukan proses pembubutan pada mesin lathe CNC terlebih dahulu menggunakan pahat insert carbide ZCC WNMG 060408 – DM dan VBMT 160408 – HM standar kekasaran yang diinginkan 1,8 µm – 2,2 µm. Berdasarkan hasil pengujian nilai kekasaran permukaan material baja S45C, data yang diperoleh menggunakan alat pengukuran kekasaran permukaan Handysurf E-35 nilai kekasaran menggunakan pahat insert carbide ZCC WNMG 060408 – DM spesimen 3 feeding 0,20 mm/rev adalah 2,38 µm, sedangkan untuk spesimen 3 feeding 0,10 mm/rev adalah 4,11 µm. Kemudian pada pahat insert carbide VBMT 160408 – HM spesimen 1 feeding 0,10 mm/rev adalah 1,48 µm, sedangkan untuk spesimen 2 feeding 0,20 mm/rev adalah 4,41 µm. Maka dapat disimpulkan bahwa nilai kekasaran terendah terjadi pada pahat insert carbide VBMT 160408 – HM dibandingkan dengan jenis pahat insert carbide ZCC WNMG 060408 – DM. Oleh karena itu, tingkat hasil nilai kekasaran permukaannya terbaik terjadi pada insert carbide VBMT 160408 – HM dengan standar kekasaran yang diinginkan dan kualitas visual yang optimal. Indonesian Society of Applied Science 2025-02-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1097 10.52158/jamere.v5i1.1097 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 5 No. 1: February 2025; 58-63 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 5 No 1: February 2025; 58-63 2775-1031 10.52158/jamere.v5i1 eng https://journal.isas.or.id/index.php/JAMERE/article/view/1097/359 Copyright (c) 2025 ezaldy, Budha Maryanti , Fransye Joni Pasau

oai:ojs2.journal.isas.or.id:article/1098 2025-02-10T05:28:42Z JAMERE:ART driver

Analisis Unjuk Kerja Pompa P-8340A Pada Motor Listrik Dan Motor Diesel Di Tangki T-8320A/B Analisis Unjuk Kerja Pompa P-8340A Pada Motor Listrik Dan Motor Diesel Di Tangki T-8320A/B Norhidayah, Siti Norhidayah, Siti Kusmianto, Herdi Hurung Anoi, Yano Muliawan, Arief filling pump, electric motor, diesel motor, pressure drop, tank Pompa pengisian, motor listrik, motor diesel, penurunan tekanan, Tangki This research aims to analyze the performance of the pump P-8340A operated by an electric motor and a diesel motor in the tank T-8320A/B. Apart from focusing on the performance of the two types of motors as pump drivers, this study also evaluates the time to fill the fire fightine water tank and the factors that influence the operational efficiency of the pump.The research methods used include taking field data at the operating location, analyzing flow capacity, pressure head and speed head, as well as calculating pump power and efficiency. The analysis results show that pumps with electric motors have a longer charging time compared to diesel motors, namely 38 hours for electric motors and 29 hours for diesel motors, with flow capacities of 239.68 m³/h and 310.54 m³/h respectively.From this research it was also identified that the total head losses in the pump were influenced by friction factors in the piping system and the characteristics of the fluid being transferred. The conclusion of this research is that although electric motors are more efficient in energy consumption, diesel motors are still superior in capacity and speed in operating the P-8340A pump. Recommendations for future operations include closer monitoring of the piping system and considering modifications to the drive system according to operational needs. Penelitian ini bertujuan untuk menganalisis unjuk kerja pompa P-8340A yang dioperasikan oleh motor listrik dan motor diesel di tangki T-8320A/B. Selain memfokuskan pada performansi kedua jenis motor sebagai penggerak pompa, studi ini juga mengevaluasi waktu pengisian tangki air pemadam kebakaran dan faktor-faktor yang mempengaruhi efisiensi operasional pompa.Metode penelitian yang digunakan mencakup pengambilan data lapangan di lokasi pengoperasian, analisis kapasitas aliran, head tekanan, dan head kecepatan, serta perhitungan daya dan efisiensi pompa. Hasil analisis menunjukkan bahwa pompa dengan motor listrik memiliki waktu pengisian yang lebih lama dibandingkan dengan motor diesel, yaitu 38 jam untuk motor listrik dan 29 jam untuk motor diesel, dengan kapasitas aliran masing-masing 239,68 m³/h dan 310,54 m³/h.Dari penelitian ini juga teridentifikasi bahwa total head losses pada pompa dipengaruhi oleh faktor gesekan dalam sistem perpipaan dan karakteristik fluida yang dipindahkan. Kesimpulan dari penelitian ini adalah bahwa meskipun motor listrik lebih efisien dalam konsumsi energi, motor diesel masih lebih unggul dalam kapasitas dan kecepatan dalam pengoperasian pompa P-8340A. Rekomendasi untuk pengoperasian di masa mendatang mencakup pengawasan yang lebih ketat terhadap sistem perpipaan dan mempertimbangkan modifikasi pada sistem penggerak sesuai dengan kebutuhan operasional. Indonesian Society of Applied Science 2025-02-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1098 10.52158/jamere.v5i1.1098 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 5 No. 1: February 2025; 6 -18 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 5 No 1: February 2025; 6 -18 2775-1031 10.52158/jamere.v5i1 eng https://journal.isas.or.id/index.php/JAMERE/article/view/1098/352 Copyright (c) 2025 Siti Norhidayah, Herdi Kusmianto, Yano Hurung Anoi, Arief Muliawan

oai:ojs2.journal.isas.or.id:article/1100 2025-02-10T05:28:42Z JAMERE:ART driver

Pengaruh Kapasitas Cavitation Air Flotation Terhadap Penurunan Total Suspended Solid Berdasarkan Baku Mutu Air Limbah di PT. X Pengaruh Kapasitas Cavitation Air Flotation Terhadap Penurunan Total Suspended Solid Berdasarkan Baku Mutu Air Limbah di PT. X Yudhi Chandra Dwiaji Tio, Monika Yudhi Chandra Dwiaji Tio, Monika limbah cair Effluent Treatment Plant (ETP) Cavitation Air Flotation (CAF) Total Suspended Solid (TSS) Effluent Treatment Plant (ETP) is an environmentally based regional waste treatment system that aims to treat liquid waste so that it can produce waste that meets quality standards. Liquid waste that cannot be treated properly can result in environmental pollution. The research methodology used is a method of observation study by direct observation including the processing process in the ETP plant, the data collected is calculated based on the parameters of liquid waste before and after processing. From the data, there are several days that show that only 80% of waste can be treated on ETP from the total waste sent from the production plant. This has an impact on the quality of TSS (Total Suspended Solid) parameters treated at CAF experiencing outspec of 20.79% of the operational standards of TSS parameters in PT X. Based on the results of research found that CAF (Cavitation Air Flotation) capacity is less maximal when the flowrate of waste to be treated is high so that the treatment capacity in ETP cannot keep up with the amount of waste sent from the production plant. This can cause the level in the accident pond and equalization pond high and eventually result in wastewater overflowing into the environment so from this analysis process is obtained the proposed improvement of the process to improve the performance of IPAL is to add CAF to the pre-treatment process. Limbah cair yang dihasilkan dari proses produksi adalah limbah yang berbahaya, karena mengandung bahan organik yang sulit didegradasi. Effluent Treatment Plant (ETP) adalah suatu sistem pengolahan limbah kawasan yang berbasis lingkungan yang bertujuan untuk mengolah limbah cair sehingga dapat menghasilkan limbah yang sudah memenuhi standar baku mutu. Limbah cair yang tidak dapat diolah dengan benar dapat mengakibatkan pencemaran lingkungan. Metodologi penelitian yang digunakan yaitu metode studi observasi dengan cara pengamatan langsung meliputi proses pengolahan yang ada di ETP plant, data yang dikumpulkan dihitung berdasarkan parameter limbah cair sebelum dan sesudah pengolahan. Dari data terdapat beberapa hari yang menunjukkan bahwa hanya 80% limbah yang dapat diolah pada ETP dari total limbah yang dikirimkan dari plant produksi. Hal ini berdampak pada kualitas parameter TSS (Total Suspended Solid) yang diolah di CAF mengalami outspec sebesar 20,79% dari standar operasional parameter TSS di PT X. Berdasarkan hasil penelitian ditemukan bahwa kapasitas CAF (Cavitation Air Flotation) yang kurang maksimal ketika flowrate limbah yang akan diolah tinggi sehingga kapasitas pengolahan di ETP tidak dapat mengikuti banyaknya limbah yang dikirim dari plant produksi. Hal ini dapat menyebabkan level di accident pond maupun equalization pond tinggi dan akhirnya mengakibatkan air limbah meluap ke lingkungan sehingga dari proses analisa ini diperoleh usulan perbaikan proses untuk meningkatkan kinerja IPAL adalah dengan menambah CAF pada proses pre-treatment. Indonesian Society of Applied Science 2025-02-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1100 10.52158/jamere.v5i1.1100 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 5 No. 1: February 2025; 19-26 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 5 No 1: February 2025; 19-26 2775-1031 10.52158/jamere.v5i1 eng https://journal.isas.or.id/index.php/JAMERE/article/view/1100/354 Copyright (c) 2025 Monika Tio,Yudhi Chandra Dwiaji

oai:ojs2.journal.isas.or.id:article/1108 2025-02-10T05:28:42Z JAMERE:ART driver

Analysis Of Tensile Strength And Microphotograph Of Corn Fiber Specimen Using Lycal Resin With Variations Of Vacuum Infusion And Vacuum Bagging Methods Analisis Kekuatan Tarik Dan Foto Mikro Spesimen Serat Jagung Menggunakan Resin Lycal Dengan Variasi Metode Pembuatan Vacuum Infusion Dan Vacuum Bagging Setiawan, Ferry Dina Prasetia, Gilang Suroso, Indreswari Anhar, Muh Setiawan, Ferry Dina Prasetia, Gilang Suroso, Indreswari Anhar, Muh indonesia komposit serat kulit jagung vacumm invusion vacum bagging Along with the development of drone technology, the development of technology in the field of materials also plays a role in advancing drone technology, where the use of materials for making drones must meet certain criteria. The natural fiber as a composite material used in this study is corn husk fiber. The type of matrix used in this study is lycal resin. And making it using the vacuum infusion and vacuum bagging methods. In addition, microstructure testing is carried out to determine the content of the content contained in the low-carbon steel specimen to be tested. By using a test specimen that has been refined so that the content in the test object can be seen. The method in this study was made of a specimen of corn fiber with lycal resin using the vacuum infusion and vacuum bagging methods, then it will be tested using tensile and microstructure tests. The results of the characteristics of the corn fiber composite material with the vacuum infusion manufacturing method, from the tensile test obtained an average value of 7.3 MPa, and in the microstructure test it can be seen that the fracture occurred due to air bubbles trapped in the specimen and the uneven weaving distance so that it affects the tensile strength. Characteristics of corn fiber composite material with vacuum bagging manufacturing method: from the tensile test results obtained an average value of 15.13 MPa, and in the microstructure test it can be seen that the fiber density level and the vacuum bagging method can produce higher specimen quality compared to vacuum infusion. Seiring perkembangannya teknologi pesawat tanpa awak ini, perkembangan teknologi dibidang material juga turut handil dalam memajukan teknologi pesawat tanpa awak ini dimana penggunaan material untuk pembuatan pesawat tanpa awak haruslah memenuhi kiriteria tertentu. Adapun serat alam sebagai bahan composit yang digunakan dalam penelitian ini adalah serat kulit jagung. Jenis matriks yang digunakan dalam penelitian ini adalah resin lycal. Serta melakukan pembuatan dengan menggunakan metode Vacuum infusion dan Vacuum bagging. Selain itu, melakukan pengujian struktur mikro dilakukan untuk mengetahui isi unsur kandungan yang terdapat didalam spesimen baja karbon rendah yang akan diuji. Dengan menggunakan spesimen uji yang telah dihaluskan agar dapat terlihat kandungan didalam benda uji tersebut. Metode pada penelitian ini dibuat suatu spesimen dari serat jagung dengan resin lycal dengan menggunakan metode vacuum infusion dan vacuum bagging kemudian akan diuji menggunakan uji tarik dan struktur mikro. Hasil karakteristik material komposit serat jagung dengan metode pembuatan vacuum infusion, dari uji tarik didapatkan nilai rata-rata 7,3 MPa dan pada pengujian struktur mikro dapat diketahui bahwa patahan terjadi dikarenakan adanya gelembung udara yang terperangkap dalam spesimen serta jarak penganyaman tidak merata sehingga mempengaruhi kekuatan tarik. Karakteristik material komposit serat jagung dengan metode pembuatan vacuum bagging, dari hasil uji tarik didapatkan nilai rata-rata 15,13 MPa dan pada pengujian struktur mikro dapat diketahui tingkat kerapatan serat serta metode vacuum bagging dapat menghasilkan kualitas spesimen yang lebih tinggi dibandingkan dengan vacuum infusion. Indonesian Society of Applied Science 2025-02-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1108 10.52158/jamere.v5i1.1108 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 5 No. 1: February 2025; 64-68 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 5 No 1: February 2025; 64-68 2775-1031 10.52158/jamere.v5i1 eng https://journal.isas.or.id/index.php/JAMERE/article/view/1108/366 Copyright (c) 2025 Feryy Setiawan, Gilang dina prasetia , Indreswari suroso, Muh anhar

oai:ojs2.journal.isas.or.id:article/1232 2025-08-02T02:48:52Z JAMERE:ART driver

Desain dan Analisis Pengujian Statik pada Chassis Mobil Golf Menggunakan Software Solidworks Ana Mufarida, Nely Purnawan, Gilang Kosjoko, Kosjoko Nurhalim, Nurhalim chassis mobil golf, SolidWorks, AISI 1015, AISI 1020, stress, displacement, factor of safety Perkembangan kendaraan listrik sebagai solusi transportasi ramah lingkungan mendorong inovasi dalam desain kendaraan ringan, termasuk mobil golf yang digunakan di lingkungan terbatas seperti kampus. Penelitian ini bertujuan untuk merancang dan menganalisis chassis mobil golf yang sesuai untuk digunakan di lingkungan Universitas Muhammadiyah Jember. Desain dilakukan dengan tipe ladder frame menggunakan dua jenis material baja karbon rendah, yaitu AISI 1015 dan AISI 1020. Proses desain dan simulasi dilakukan menggunakan software SolidWorks 2018 dengan fokus pada tiga parameter utama: tegangan (stress), perpindahan (displacement), dan faktor keamanan (Factor of Safety/FOS). Desain chassis diuji menggunakan beban statik yang merepresentasikan penumpang dan komponen kendaraan. Hasil simulasi menunjukkan bahwa desain terbaik diperoleh pada material baja AISI 1020, yang menghasilkan nilai tegangan maksimum sebesar 111,924N/mm², displacement maksimum 0,934mm, dan FOS sebesar 3,1. Penelitian ini menunjukkan bahwa pemilihan desain dan material sangat berpengaruh terhadap performa struktural chassis, serta menegaskan bahwa SolidWorks dapat digunakan secara efektif untuk simulasi awal dalam pengembangan kendaraan ringan. Indonesian Society of Applied Science 2025-08-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1232 10.52158/jamere.v5i2.1232 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 5 No. 2 (2025); 77-82 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 5 No 2 (2025); 77-82 2775-1031 10.52158/jamere.v5i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/1232/409 Copyright (c) 2025 Gilang Purnawan, Nely Ana Mufarida, Kosjoko, Nurhalim

oai:ojs2.journal.isas.or.id:article/1242 2025-08-02T02:48:52Z JAMERE:ART driver

Pengaruh Variasi Suhu Pirolisis terhadap Karakteristik Bio-Oil dari Limbah Batang Tembakau sebagai Bahan Bakar Alternatif Kurniawan, Bagus Dwi Abidin, Asroful Kosjoko, Kosjoko Bio-oil, Karakteristik bahan bakar, Pirolisis, Suhu pirolisis, Limbah batang tembakau Limbah batang tembakau memiliki potensi sebagai bahan baku alternatif untuk produksi bio-oil melalui pirolisis. Pirolisis adalah metode termokimia yang mengubah biomassa menjadi bio-oil, biochar, dan gas pirolitik, dengan suhu yang berbeda memengaruhi karakteristik produk. Namun, kualitas bio-oil yang dihasilkan bergantung pada parameter proses, terutama suhu pirolisis, yang memengaruhi tingkat pH, Total Padatan Terlarut (TDS), dan kadar alkohol. Penelitian ini bertujuan untuk mengevaluasi pengaruh variasi suhu pirolisis terhadap karakteristik bio-oil yang berasal dari limbah batang tembakau guna mengoptimalkan pemanfaatannya sebagai bahan bakar alternatif. Eksperimen dilakukan dengan menggunakan suhu pirolisis 290°C, 390°C, dan 490°C selama 60 menit, kemudian dianalisis sifat bio-oil melalui pengukuran pH, TDS, dan kadar alkohol. Hasil penelitian menunjukkan bahwa peningkatan suhu pirolisis menyebabkan peningkatan keasaman bio-oil, yang membatasi penggunaannya pada mesin konvensional namun membuatnya cocok untuk pembakaran langsung di boiler. Tingkat TDS meningkat hingga suhu 390°C sebelum sedikit menurun pada 490°C, yang mengindikasikan degradasi termal senyawa terlarut pada suhu tinggi. Selain itu, kadar alkohol dalam bio-oil menurun seiring meningkatnya suhu pirolisis karena volatilitas yang lebih besar pada tingkat panas yang tinggi. Penelitian ini memberikan wawasan mengenai karakteristik bio-oil dari pirolisis batang tembakau, yang dapat menjadi referensi dalam mengoptimalkan teknologi konversi biomassa untuk aplikasi energi yang lebih efisien dan berkelanjutan. Indonesian Society of Applied Science 2025-08-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1242 10.52158/jamere.v5i2.1242 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 5 No. 2 (2025); 83-87 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 5 No 2 (2025); 83-87 2775-1031 10.52158/jamere.v5i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/1242/410 Copyright (c) 2025 Bagus Dwi Kurniawan, Asroful Abidin , Kosjoko

oai:ojs2.journal.isas.or.id:article/1266 2025-08-02T02:48:52Z JAMERE:ART driver

Analisisi Penelitian Performansi Pompa Air Pada Divisi Persemaian Di Kalimantan Timur Ferdnian, Marsius Joni Pasau, Fransye Air Bersih, Pompa, Performansi Pompa The engine pump is used to move fluids by converting mechanical energy into fluid energy and pressure, then transporting the fluid through the piping system. The use of pumps to meet clean water needs. The method with the working principle or how the pump flows fluids or provides fluid power, the results of the study show that the pump capacity with a water discharge of 15 L / m, the total head is 4.807 m, and after knowing the curve where there is an increase in pressure at the outlet (discharge pressure) there will be a decrease in the amount of flow and the higher the amount of flow that comes out, the higher the pressure capacity of the fluid. In the demin water transfer pump, it is known that the available NPSH (6.7 meters) is greater than the required NPSH (6.2 meters), so the pump can. So to fill the water reservoir at the Permanent Nursery Service, the pump operates for 8.5 hours per day. Data analysis and discussion can be concluded that the pump capacity with a water discharge of 15 L/m, the total head is 4.807 m, In the demin water transfer pump it is known that the available NPSH (6.7 meters) is greater than the required NPSH (6.2 meters), so the pump can work without experiencing cavitation. So to meet the needs of the water reservoir in the Permanent Nursery Division, the pump operates for 8-5 hours per day. Indonesian Society of Applied Science 2025-08-02 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1266 10.52158/jamere.v5i2.1266 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 5 No. 2 (2025); 97-101 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 5 No 2 (2025); 97-101 2775-1031 10.52158/jamere.v5i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/1266/437 Copyright (c) 2025 Marsius Ferdnian,Fransye Joni Pasau

oai:ojs2.journal.isas.or.id:article/1324 2025-08-02T02:48:52Z JAMERE:ART driver

Analisa Performa Dessicant Dehumidifier Terhadap Bukaan Damper Pre-Cooling Dengan 10 – 100% Bukaan Pada Aplikasi Clean Room PT Marin Liza Farmasi Chandra Dwiaji, Yudhi Maulana, Ade dehumidifier pre-cooling damper clean room Indonesia is a country that has a tropical climate, so the content of water vapour in the air is very high, therefore many industrial products are damaged due to high humidity, such as products with hygroscopic material characteristics, for example powder products, medicine tablets, sugar, fertilisers or products with other similar applications. The product will experience clumping so that the resulting product quality is not optimal. On the other hand, high air humidity in a controlled room is certainly very detrimental to the continuity of the production process as well as in clean room applications. Effervescent’s production room at PT Marin Liza Farmasi is an example of a clean room with temperature and RH controlled at 23°C and a water vapour content of 3.47 g/kg with RH less than 20%. If the temperature and water vapour content are not met, production cannot be carried out. The room is positively pressurised with 1177 CFM of fresh air. Damper in pre-cooling is a part that is very influential on the performance of desiccant dehumidifier. Pre-cooling dampers with openings of 10% - 100% openings will affect the value of the bypass factor and air contact factor against the evaporator cooling coil on the pre-cooling AHU, this will also affect the amount of water vapor partial pressure which is influenced by the large temperature coming out of the pre-cooling AHU due to the influence of the evaporator coil temperature. Each damper opening will be tried and analyzed to get the best water vapor content out of the dehumidifier without disturbing the performance of other systems. The damper openings selected for the Effervescent production clean room project at PT Marin Liza Farmasi are the 50% and 60% openings that produce the best dehumidifier performance without interfering with the performance of other systems, which at these openings produce a dehumidifier outlet water vapor content of 1.12 g/kg at the 50% opening with a bypass factor in pre-cooling of 12.26% and 1.2 g/kg at the 60% opening with a bypass factor in pre cooling of 12.90%. Indonesian Society of Applied Science 2025-08-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1324 10.52158/jamere.v5i2.1324 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 5 No. 2 (2025); 88 - 96 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 5 No 2 (2025); 88 - 96 2775-1031 10.52158/jamere.v5i2 eng https://journal.isas.or.id/index.php/JAMERE/article/view/1324/415 Copyright (c) 2025 Ade Maulana, Yudhi Chandra Dwiaji

oai:ojs2.journal.isas.or.id:article/1469 2026-01-31T15:06:27Z JAMERE:ART driver

Perawatan Dan Perbaikan Fruit Elevator Pabrik Kelapa Sawit Perawatan Dan Perbaikan Fruit Elevator Pabrik Kelapa Sawit Marjuki, Ismael Epriyandi, Epriyandi Miftakhul Sasti, Rafly Keywords: Fruit Elevator, Preventive Maintenance, corrective maintenance, overhaul The palm oil plantation and processing industry is a key industry for Indonesia's economy. Palm oil exports are an important source of foreign exchange earnings, and this industry provides employment opportunities for millions of Indonesians. According to data from the Indonesian Ministry of Agriculture, the total area of palm oil plantations in Indonesia currently reaches around 8 million hectares, twice the area in the early 2000s, with around 30% located on the island of Kalimantan. In an analysis of the factors affecting Indonesia's palm oil exports (Ditjenbun, 2018). This research method is a qualitative research that emphasizes more on the process and results, how a treatment and care occurs and how to handle it effectively. Conclusion, Preventive maintenance is carried out on bucket bolts, bucket chains, transmission chains, and buckets. Preventive corrective maintenance is carried out on gearboxes, transmission chains, sprocket bearings, buckets, and bucket chains. Preventive breakdown maintenance is carried out during the replacement of bucket chains, sprocket bearings, and transmission gears. There are various types of damage that commonly occur in Fruit Elevators, including: damage to buckets, sprocket bearings, gearboxes, oil seals, and bucket chains. The causes of damage generally come from wear and tear, lack of lubrication, or mechanical wear due to high workload. Daily, weekly, monthly, and annual maintenance has been carried out with respective procedures such as lubrication, component checks, replacement of spare parts, and overhaul. The implementation of this maintenance schedule has proven effective in reducing the frequency of damage. Component replacement history data shows that components such as liners, sprockets, buckets, and gearboxes have the highest damage rates, thus requiring special attention and periodic monitoring to prevent repeated damage. Industri perkebunan dan pengolahan sawit adalah industri kunci bagi perekonomian Indonesia. Ekspor minyak kelapa sawit adalah penghasil devisa yang penting dan industri ini memberikan kesempatan kerja bagi jutaan orang Indonesia. Menurut data dari Kementerian Pertanian Indonesia, jumlah total luas area perkebunan sawit di Indonesia pada saat ini mencapai sekitar 8 juta hektar, dua kali lipat dari luas area di awal tahun 2000-an, sekitar 30% - berada di pulau Kalimantan. Dalam analisis faktor-faktor yang mempengaruhi ekspor minyak kelapa sawit Indonesia (Ditjenbun, 2018). Metode Penelitian ini merupakan penelitian kualitatif lebih menekankan pada proses dan hasil, bagaimana suatu perawatan dan perawatan yang terjadi dan bagaimana cara yang efektif dalam menanganinya. Kesimpulan, Preventif maintenance dilakukan pada baut bucket, rantai bucket, rantai transmisi dan bucket. Preventif korektif dilakukan pada gearbox, rantai transmisi, sprocker bearing sprfocket, bucket dan rantai bucket. Preventif breakdown dilakukan padasaat pergantian rantai bucket, bearing sprocket dan gear transmisi. Terdapat berbagai jenis kerusakan yang umum terjadi pada Fruit Elevator, di antaranya: kerusakan pada bucket, bearing sprocket, gearbox, oil seal, serta rantai bucket. Penyebab kerusakan umumnya berasal dari aus, pelumasan yang kurang, atau keausan mekanis akibat beban kerja tinggi. Perawatan harian, mingguan, bulanan, dan tahunan telah dilaksanakan dengan prosedur masing-masing seperti pelumasan, pengecekan komponen, pergantian suku cadang, hingga overhaul. Penerapan jadwal perawatan ini terbukti efektif dalam menurunkan frekuensi kerusakan. Data riwayat penggantian komponen menunjukkan bahwa komponen seperti liner, sprocket, bucket, dan gearbox memiliki tingkat kerusakan tertinggi, sehingga perlu perhatian khusus dan pemantauan berkala untuk mencegah kerusakan berulang. Indonesian Society of Applied Science 2026-02-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1469 10.52158/9d081m18 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 6 No. 1 (2026); 1-5 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 6 No 1 (2026); 1-5 2775-1031 10.52158/d6nrew57 ind https://journal.isas.or.id/index.php/JAMERE/article/view/1469/462 10.52158/z78kz259 Copyright (c) 2025 Ismael Marjuki, Epriyandi Epriyandi, Rafly Miftakhul Sasti https://creativecommons.org/licenses/by/4.0/

oai:ojs2.journal.isas.or.id:article/1489 2026-01-31T14:59:35Z JAMERE:ART driver

Pengaruh Variasi Campuran Air Suling dan Air Mineral pada Larutan Elektrolit terhadap Tegangan Aki Effect of Varying Mixtures of Distilled Water and Mineral Water in Electrolyte Solution on Battery Voltage Norhidayah, Siti Saputra, Hildar Hurung Anoi, Yano Ratnawati, Ratnawati Norhidayah, Siti Saputra, Hildar Hurung Anoi, Yano Ratnawati, Ratnawati variations in electrolyte voltage 35 Ah and 45 Ah batteries variasi larutan elektrolit tegangan aki 35 Ah dan 45 Ah Accumulator/aki adalah suatu jenis baterai yang banyak digunakan untuk  kendaraan  bermotor. Aki motor secara umum dibedakan menjadi dua jenis yaitu aki basah dan aki kering. Di dalam aki basah terdapat cairan yang disebut elektrolit, elektrolit ini terbuat dari kandungan asam dengan air. Namun kandungan asam yang dihasilkan terkadang tidak sama dikarenakan pemilihan campuran air yang digunakan kurang tepat. Tujuan dalam penelitan ini adalah untuk mengetahui campuran elektrolit paling efektif terhadap perfoma tegangan pada aki dengan membandingkan penggunaan antara air suling dan air mineral. Metode penelitian ini bersifat eksperimental dengan membandingkan variasi larutan elektrolit pada dua aki berkapasitas 35Ah dan 45Ah. Output yang menjadi perbandingan yaitu pengukuran nilai tegangan yang dihasilkan oleh dua buah aki yang diuji. Pengujian dilakukan dalam kurun waktu 15 menit sampai 120 menit sebelum dan setelah charge. Pengukuran pada mobil berkapasitas 1200 cc dengan putaran 1000 rpm sampai 3000 rpm, larutan elektrolit pada air suling mendapatkan nilai tegangan yang lebih tinggi daripada air mineral, dengan tegangan saat penuangan pertama setelah 120 menit yaitu 12.9 volt dan setelah dicharge naik menjadi 13.6 volt.  Kemudian di mobil pada putaran 1000 rpm mendapatkan tegangan stabil 14.5 volt dan saat start engine pertama 10.2 volt. Kesimpulan dari penelitian ini elektrolit air suling terbilang lebih cocok digunakan untuk air aki ketimbang elektrolit air mineral. Untuk pemakaian jangka lama elektrolit air suling lebih baik dibandingkan elektrolit air mineral yang mudah panas saat digunakan pada jangka waktu yang lama dan diputaran rpm tinggi Accumulator/battery is a type of battery that is widely used for motorized vehicles. Motorcycle batteries are generally divided into two types, namely wet batteries and dry batteries. Inside a wet battery there is a liquid called electrolyte, this electrolyte is made from acid and water. However, the acid content produced is sometimes not the same due to the inappropriate selection of the water mixture used. The aim of this research is to find out the most effective electrolyte mixture for battery voltage performance by comparing the use of distilled water and mineral water. This research method is experimental by comparing variations in electrolyte solutions in two batteries with a capacity of 35Ah and 45Ah. The output used for comparison is the measurement of the voltage value produced by the two batteries being tested. Testing was carried out within a period of 15 minutes to 120 minutes before and after charging. Measurements on a car with a capacity of 1200 cc with a rotation of 1000 rpm to 3000 rpm, the electrolyte solution in distilled water obtained a higher voltage value than mineral water, with the voltage during the first pour after 120 minutes being 12.9 volts and after being charged it rose to 13.6 volts.  The conclusion of this research is that for long-term use, distilled water electrolyte is better than mineral water electrolyte which heats up easily when used for long periods of time and at high rpm. Indonesian Society of Applied Science 2026-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1489 10.52158/fym0zz84 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 6 No. 1 (2026); 6-16 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 6 No 1 (2026); 6-16 2775-1031 10.52158/d6nrew57 ind https://journal.isas.or.id/index.php/JAMERE/article/view/1489/509 10.52158/7b2w4t96 Copyright (c) 2026 Siti Norhidayah, Hildar Saputra, Yano Hurung Anoi, Ratnawati Ratnawati https://creativecommons.org/licenses/by/4.0/

oai:ojs2.journal.isas.or.id:article/1507 2026-02-26T04:59:22Z JAMERE:ART driver

Rancang Bangun Mesin CNC Painting Berbasis Mach 3 Rancang Bangun Mesin CNC Painting Berbasis Mach 3 Rudi Kristianto Y AstomoD.S Chatarina Adjeng Aprilliasari Benedictus Bimo Kurniawan Dionicius Wijang Fenandy Esa Muhammad Rosyid Wijaya Reza Andhika Sudiyoko Rudi Kristianto Y AstomoD.S Chatarina Adjeng Aprilliasari Benedictus Bimo Kurniawan Dionicius Wijang Fenandy Esa Muhammad Rosyid Wijaya Reza Andhika Sudiyoko Mesin CNC Proses Pengecatan Mach 3 controller Pengecatan otomatis Sistem Pneumatik Penelitian ini membahas proses perancangan dan pembangunan mesin CNC Painting berbasis Mach3 yang ditujukan untuk membantu proses pengecatan secara otomatis dengan hasil yang terkontrol dan seragam. Latar belakang dari proyek ini adalah kebutuhan akan sistem pengecatan yang dapat menggantikan metode manual, mengurangi ketergantungan pada operator, serta menghasilkan kualitas pengecatan yang konsisten. Metode yang digunakan meliputi perancangan struktur mekanik pada sumbu X, Y, dan Z, pemasangan sistem pneumatik yang difungsikan sebagai penarik pelatuk spray gun dalam proses pengecatan, serta integrasi sistem kontrol berbasis perangkat lunak Mach3 untuk mengatur pergerakan motor stepper sesuai jalur gerak yang telah diprogram. Pengujian dilakukan terhadap seluruh bagian sistem, termasuk pengujian mekanik pergerakan tiap sumbu dan pengujian fungsi sistem spray. Hasil pengujian menunjukkan bahwa mesin mampu bergerak pada setiap sumbu dan menjalankan proses pengecatan. Mekanisme penarikan pelatuk melalui pneumatik bekerja secara responsif sesuai perintah program, sehingga proses pengecatan dapat berlangsung otomatis. Kesimpulannya, mesin CNC Painting yang dirancang dalam proyek ini berhasil menjalankan fungsi pengecatan otomatis sesuai dengan rancangan, dan berpotensi untuk diterapkan dalam kebutuhan pengecatan berulang dengan hasil yang konsisten. This study presents the design and development of a CNC Painting machine based on Mach3 software, aimed at enabling automated Painting processes with controlled and uniform results. The project was motivated by the need for a system that can replace manual Painting methods, reduce operator dependency, and ensure consistent coating quality. The methodology involved the mechanical design of the X, Y, and Z axes, the integration of a pneumatic system to actuate the spray gun trigger, and the implementation of a Mach3-based control system to regulate stepper motor movements according to programmed trajectories. Comprehensive testing was conducted on all subsystems, including mechanical axis motion and spray functionality. The experimental results demonstrate that the machine is capable of operating across all axes and performing Painting tasks effectively. The pneumatic trigger mechanism responded reliably to program commands, enabling fully automated Painting operations. In conclusion, the CNC Painting machine developed in this project successfully achieved its intended function and shows potential for applications requiring repetitive Painting tasks with consistent outcomes Indonesian Society of Applied Science 2026-02-26 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1507 10.52158/1gx6wt69 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 6 No. 1 (2026); 40-46 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 6 No 1 (2026); 40-46 2775-1031 10.52158/d6nrew57 ind https://journal.isas.or.id/index.php/JAMERE/article/view/1507/520 Copyright (c) 2026 Rudi Kristianto, Y AstomoD.S, Chatarina Adjeng Aprilliasari, Benedictus Bimo Kurniawan, Dionicius Wijang Fenandy Esa, Muhammad Rosyid Wijaya, Reza Andhika Sudiyoko https://creativecommons.org/licenses/by/4.0/

oai:ojs2.journal.isas.or.id:article/1510 2026-01-31T14:59:35Z JAMERE:ART driver

Pengaruh Kecepatan Potong dan Kecepatan Pemakanan terhadap Kekasaran Permukaan Baja ST42 pada Proses Pembubutan Konvensional Pengaruh Kecepatan Potong dan Kecepatan Pemakanan terhadap Kekasaran Permukaan Baja ST42 pada Proses Pembubutan Konvensional Maryanti, Budha Joni Pasau, Fransye Harahap, Veryyon Pongsapan, Lia Putra, Renaldi Maryanti, Budha Joni Pasau, Fransye Harahap, Veryyon Pongsapan, Lia Putra, Renaldi kecepatang potong, kecepatan pemakanan dan kekasaran permukaan ST42 steel; conventional turning; cutting speed; feed rate; surface roughness Penelitian ini menganalisis pengaruh kecepatan potong, kecepatan pemakanan, dan kedalaman potong terhadap kekasaran permukaan hasil pembubutan baja karbon ST42. Pengujian dilakukan menggunakan mesin bubut konvensional dengan spesimen ST42 berdiameter 30 mm dan panjang 50 mm. Parameter permesinan divariasikan pada kecepatan potong 100–500 rpm, kecepatan pemakanan 2,25–2,50 mm/rev, serta kedalaman potong 1,5 mm dan 2,5 mm. Pengukuran kekasaran permukaan dilakukan menggunakan surface roughness tester Mitutoyo SJ-310. Hasil penelitian menunjukkan bahwa peningkatan kecepatan potong menurunkan kekasaran permukaan, sedangkan peningkatan kecepatan pemakanan meningkatkan kekasaran. Nilai kekasaran permukaan terendah sebesar 3.792 µm diperoleh pada kecepatan potong 500 rpm, kecepatan pemakanan 2,25 mm/rev, dan kedalaman potong 2,5 mm This study analyses the effects of cutting speed, feed rate, and depth of cut on the surface roughness produced during the turning of ST42 carbon steel. The experiments were conducted using a conventional lathe with ST42 steel specimens of 30 mm in diameter and 50 mm in length. The machining parameters were varied at cutting speeds of 100–500 rpm, feed rates of 2.25–2.50 mm/rev, and depths of cut of 1.5 mm and 2.5 mm. Surface roughness measurements were performed using a Mitutoyo SJ-310 surface roughness tester. The results indicate that increasing the cutting speed reduces surface roughness, whereas increasing the feed rate leads to higher surface roughness values. The lowest surface roughness value of 3.792 µm was obtained at a cutting speed of 500 rpm, a feed rate of 2.25 mm/rev, and a depth of cut of 2.5 mm Indonesian Society of Applied Science 2026-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1510 10.52158/dm3ctk40 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 6 No. 1 (2026); 24-28 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 6 No 1 (2026); 24-28 2775-1031 10.52158/d6nrew57 ind https://journal.isas.or.id/index.php/JAMERE/article/view/1510/513 10.52158/9sm81b36 Copyright (c) 2026 Budha Maryanti, Fransye Joni Pasau, Veryyon Harahap, Lia Pongsapan, Renaldi Putra https://creativecommons.org/licenses/by/4.0/

oai:ojs2.journal.isas.or.id:article/1511 2026-01-31T14:59:35Z JAMERE:ART driver

Pengaruh Pembersihan Biogas Menggunakan Larutan NaOH terhadap Performa Motor Bensin: Studi Komparatif RPM, Torsi, Konsumsi Bahan Bakar, dan Emisi Gas Buang Pengaruh Pembersihan Biogas Menggunakan Larutan NaOH terhadap Performa Motor Bensin: Studi Komparatif RPM, Torsi, Konsumsi Bahan Bakar, dan Emisi Gas Buang Chandra Dwiaji, Yudhi Chandra Dwiaji, Yudhi biogas pembersihan NaOH motor bensin 4-tak performa motor emisi gas buang biogas, NaOH purification, four-stroke gasoline engine, engine performance, exhaust gas emissions Biogas merupakan sumber energi terbarukan yang menjanjikan untuk aplikasi motor bakar, namun kandungan kontaminan seperti CO₂ (25-45%), H₂S (10-40 ppm), dan H₂O mengurangi nilai kalor dan dapat merusak komponen mesin. Penelitian ini menganalisis pengaruh pembersihan biogas menggunakan larutan NaOH terhadap performa motor bensin 4-tak. Pengujian dilakukan pada motor bensin dengan variasi konsentrasi NaOH (0%, 10%, 20%, 30%) untuk pembersihan biogas. Parameter yang diukur meliputi RPM, torsi, konsumsi bahan bakar spesifik (KBBS), suhu gas buang, dan emisi gas (CO, CO₂, HC, O₂). Hasil penelitian menunjukkan bahwa konsentrasi NaOH optimal sebesar 20% dapat menurunkan kandungan CO₂ hingga 71,9% dengan peningkatan kemurnian CH₄ mencapai 87,76%. Performa motor dengan biogas terproses menunjukkan stabilitas putaran yang lebih baik, torsi meningkat 8-12%, dan emisi CO₂ turun 15-22% dibandingkan biogas tanpa pembersihan. Efisiensi konsumsi bahan bakar dengan biogas terproses mencapai 144,625 g/kW.jam, lebih efisien dibanding bensin premium. Penelitian ini memberikan rekomendasi praktis untuk optimalisasi pemanfaatan biogas sebagai bahan bakar alternatif ramah lingkungan. This study investigates the effect of biogas purification using sodium hydroxide (NaOH) solution on the performance of a four-stroke gasoline engine. Biogas is a promising renewable energy source, but the presence of contaminants such as CO₂, H₂S, and water vapour reduces its calorific value and can cause corrosion in engine components. In this research, biogas is purified using NaOH solution with four concentration levels (0%, 10%, 20%, and 30%), and then supplied to a gasoline engine as an alternative fuel. The measured parameters include engine speed (RPM), torque, brake specific fuel consumption (BSFC), exhaust gas temperature, and exhaust emissions (CO, CO₂, HC, O₂) under several load conditions. The results indicate that a NaOH concentration of 20% is optimal, reducing CO₂ content by about 70% and significantly increasing CH₄ purity, which leads to an improvement in torque by approximately 8–12% and a reduction in BSFC compared to untreated biogas. Furthermore, the purified biogas lowers CO and HC emissions and slightly reduces CO₂ emissions relative to raw biogas, demonstrating better combustion quality and environmental performance while maintaining engine operation that is comparable to gasoline fuel. Indonesian Society of Applied Science 2026-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1511 10.52158/6t3chv51 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 6 No. 1 (2026); 17-23 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 6 No 1 (2026); 17-23 2775-1031 10.52158/d6nrew57 ind https://journal.isas.or.id/index.php/JAMERE/article/view/1511/512 10.52158/sefxnt28 Copyright (c) 2026 Yudhi Chandra Dwiaji https://creativecommons.org/licenses/by/4.0/

oai:ojs2.journal.isas.or.id:article/1516 2026-01-31T15:13:41Z JAMERE:ART driver

Perancangan Model Turbin Air Dengan Sistem Sirkulasi Tertutup Perancangan Model Turbin Air Dengan Sistem Sirkulasi Tertutup Anhar, Muh Chandra Dwiaji, Yudhi Anhar, Muh Chandra Dwiaji, Yudhi Energi turbin pelton sirkulasi Energy;Turbine; Circulation Masyarakat modern sangat lekat dengan kemajuan teknologi, dengan teknologi masyarakat dapat dengan mudah memenuhi kebutuhan energi, salah satu contoh adalah energi listrik hasil engolahan mesin konversi energi air dengan menggunakan turbin.Tujuan perancangan ini sebagai pemecahan masalah yang dihadapi pada daerah yang tidak ada aliran sungai ataupun air terjun untuk membuat turbin air dengan model sirkulasi tertutup. Adapun metodologi dalam perancangan ini adalah eksperimen yang di dukung oleh program autocad 2010.Dari hasil perancangan diperoleh daya turbin sebesar 1,56 watt dengan tandon sebagai patokan perancagan dan penggunaan pompa (positive displacement pump) sebagai alat pensirkulasi Modern society is very closely related to technological advances, with community technologycan easily meet energy needs, one example is the electrical energy processing of energy conversion machines using turbine energy. The purpose of this design as a problem solving faced in areas with no stream or waterfall to make a water turbine with closed circulation model. The methodology in this design is an experiment that is supported by the 2010 autocad program. From the design results obtained turbine power of 1.56 watts with a tank as a benchmark design and the use of the pump (positive displacement pump) as a means of circulation Indonesian Society of Applied Science 2026-02-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1516 10.52158/edzfhx92 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 6 No. 1 (2026); 29-32 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 6 No 1 (2026); 29-32 2775-1031 10.52158/d6nrew57 ind https://journal.isas.or.id/index.php/JAMERE/article/view/1516/515 10.52158/y7h5zt19 Copyright (c) 2026 Muh Anhar, Yudhi Chandra Dwiaji https://creativecommons.org/licenses/by/4.0/

oai:ojs2.journal.isas.or.id:article/1522 2026-02-24T12:49:51Z JAMERE:ART driver

Studi Analisis Perbandingan Laju Korosi Pada Permukaan Material Plat Aluminium 1100-0 Dengan Menggunakan Inhibitor Cat Epoxy Diton 9120 Primer Grey Dalam Larutan Air Laut K3Fe 9,0%, NaOH 4,76% Comparative Analysis Study of Corrosion Rate on the Surface of 1100-0 Aluminum Plate Material Using Epoxy Paint Inhibitor Diton 9120 Primer Grey in Seawater Solution K3Fe 9.0%, NaOH 4.76% Simons, Yuliana Joni Pasau, Fransye Syarif, Muhammad Lau Yalla, Yosua Yusprasetyo, Dwi Simons, Yuliana Joni Pasau, Fransye Syarif, Muhammad Lau Yalla, Yosua Yusprasetyo, Dwi Corrosion, Aluminum, Inhibitor korosi, aluminium, inhibitor Masalah korosi merupakan suatu material yang prosesnya berjalan lambat. Berbagai faktor dapat mempengaruhi terjadinya korosi diantaranya lingkungan campuran logam dan lain-lain. Aluminium mudah dibentuk, bisa ditempa menjadi lembaran, ditarik menjadi kabel, dan diekstrusi menjadi batang dengan berbagai bentuk penampang. Inhibitor secara umum adalah zat kimia. Penggunaan tiga jenis larutan yang berbeda memberikan pengaruh yang signifikan terhadap laju korosi pada permukaan plat aluminium 1100-0. Larutan HCl menunjukkan tingkat korosivitas paling tinggi karena sifatnya sebagai asam kuat yang mampu melarutkan lapisan oksida pelindung aluminium, sehingga mempercepat terjadinya reaksi elektrokimia dan meningkatkan laju korosi secara signifikan. Penggunaan inhibitor berupa cat epoxy diperlukan sebagai pelindung permukaan aluminium 1100-O karena material ini rentan mengalami korosi ketika terpapar langsung oleh larutan yang bersifat asam, oksidatif, maupun basa. Cat epoxy berfungsi sebagai lapisan penghalang yang efektif untuk mencegah kontak langsung antara permukaan aluminium dan lingkungan korosif. Corrosion is a material whose process is slow. Various factors can influence corrosion, including the environment of the metal mixture and others. Aluminum is easily formed, can be forged into sheets, drawn into wires, and extruded into rods with various cross-sectional shapes. Inhibitors are generally chemical substances. The use of three different types of solutions has a significant effect on the corrosion rate on the surface of the 1100-0 aluminum plate. HCl solution shows the highest level of corrosivity because it is a strong acid that can dissolve the protective oxide layer of aluminum, thereby accelerating the electrochemical reaction and significantly increasing the corrosion rate. The use of inhibitors in the form of epoxy paint is necessary to protect the surface of 1100-0 aluminum because this material is susceptible to corrosion when directly exposed to acidic, oxidative, or basic solutions. Epoxy paint functions as an effective barrier layer to prevent direct contact between the aluminum surface and the corrosive environment. Indonesian Society of Applied Science 2026-02-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journal.isas.or.id/index.php/JAMERE/article/view/1522 10.52158/nzwgxy77 Journal of Applied Mechanical Engineering and Renewable Energy; Vol. 6 No. 1 (2026); 30-39 Journal of Applied Mechanical Engineering and Renewable Energy; Vol 6 No 1 (2026); 30-39 2775-1031 10.52158/d6nrew57 ind https://journal.isas.or.id/index.php/JAMERE/article/view/1522/519 Copyright (c) 2026 Yuliana Simons, Fransye Joni Pasau, Muhammad Syarif, Yosua Lau Yalla, Dwi Yusprasetyo https://creativecommons.org/licenses/by/4.0/