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All Journal Jurnal Elemen Scientific Journal of Mechanical Engineering Kinematika International Journal of Marine Engineering Innovation and Research JTAM ROTARY
Mastiadi Tamjidillah
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Journal : jtam rotary

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PENGARUH UKURAN SERBUK ARANG KAYU ULIN TERHADAP EFEKTIVITAS PEMURNIAN BIOGAS Andri Purwata; Mastiadi Tamjidillah
JTAM ROTARY Vol 1, No 2 (2019): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v1i2.1753

Abstract

This study aims to determine the effect of ironwood charcoal powder size on the effectiveness of biogas purification and generator-set performance. This research was carried out by flowing biogas from sanitary landfill to biogas purification insulator containing adsorption media with charcoal varying charcoal size variations, namely size 20, 30 and 40 mesh, then biogas stored in a storage tube then flowed to the chamber for CO2 level reading and CH4 uses a gas analyzer. From this study the following results were obtained: Biogas without charcoal (CO2 26514.66 ppm and CH4 101.07 ppm), Biogas with a size of 20 mesh (CO2 20270.08 ppm, CH4 458.35 ppm and effectiveness of 23.55%), with a size of 30 mesh (CO2 14273.31 ppm, CH4 658.75 ppm and effectiveness of 46.16%), with a size of 40 mesh (CO2 12092.66 ppm, CH4 3161.04 ppm and effectiveness of 54.39%). For the results of testing the performance of generator sets using biogas fuel which has been purified with ironwood charcoal with a size of 40 mesh, ie for no load, rotation is obtained at 3465.0 rpm, temperature 102 0C, and voltage 240 V (stable), with load 350 W obtained rotation 3203.8 rpm, temperature 236 0C, and voltage 150-240 V (unstable), with a load of 700 W obtained rotation 3360.9 rpm, temperature 220 0C, and voltage 100-200 V (unstable). Keywords: Biogas Purification, Variation in Mesh Size, Ironwood Charcoal. Keywords: Purification of Biogas, Mesh Size Variations, Ulin Wood Charcoal
ANALISIS KEGAGALAN OPERASI COOLING TOWER FAN UNIT 2B PLTU ASAM ASAM Andhika Bayu Oktavianto; Mastiadi Tamjidillah
JTAM ROTARY Vol 2, No 1 (2020): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v2i1.2005

Abstract

Salah satu pembangkit listrik di Indonesia adalah pembangkit listrik Asam Asam yang terletak di dekat mulut tambang batubara. Setiap pembangkit listrik membutuhkan sejumlah besar air sebagai fluida kerja atau sebagai air pendingin. Pembangkit Listrik Tenaga Uap Asam Asam Batubara menggunakan air sungai sebagai air pendingin dengan mesin pendingin sebagai mesinnya. Pada bulan September 2017, menara pendingin unit 2B dari PLTU Asam Asam Batubara mengalami kegagalan operasi karena spacer rusak dan membuat PLTU Asam Asam Batubara mengalami penurunan dan kerugian lainnya. Tim teknik mendiagnosis kasus tersebut karena ketidakselarasan. Berdasarkan uraian akar penyebab masalah, ada tiga masalah utama yang mungkin terjadi yaitu: misalignment, unbalance, dan rotasi gearbox berat. Misalignment adalah pemicu utama untuk serangkaian masalah yang menyebabkan kegagalan operasi menara pendingin. Maka perlu mempelajari masalah utama yang menyebabkan kegagalan operasi menara pendingin untuk ditindaklanjuti dengan pemeliharaan preventif sesuai dengan kondisi saat ini untuk mencegah kegagalan yang serupa di unit 2B dan unit serupa lainnya. One of the power plants in Indonesia is the Asam Asam power plant located near the mouth of the coal mine. Each power plant requires large amounts of water as a working fluid or as a cooling water. Asam Asam Coal Fired Steam Power Plant uses river water as a cooling water with the cooling towers as its engine. In September 2017, the cooling tower unit 2B of Asam Asam Coal Fired Steam Power Plant experienced an operation failure because of the spacer was broken and made the Asam Asam Coal Fired Steam Power Plant to experience derating and other losses. The engineering team diagnoses the case due to misalignment. Based on the description of the root causes of the problem, there are three main problems that might occur namely : misalignment, unbalance, and heavy gearbox rotation. Misalignment is the main trigger for a series of problems causing failure of cooling tower operations. Then it is necessary to study the main problems causing the failure of the cooling tower operation to be followed up with preventive maintenance in accordance with the current conditions to prevent similar failures in unit 2B and other similar units.
PENGARUH JARAK ANTAR ELEKTRODA PLAT STAINLESS STEEL TERHADAP PRODUKTIFITAS DAN EFISIENSI GENERATOR HHO MENGGUNAKAN METODE ELEKTROLISIS AIR SUMUR DENGAN KATALIS NaHCO3 Khairul Sahwan; Mastiadi Tamjidillah
JTAM ROTARY Vol 2, No 2 (2020): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v2i2.2415

Abstract

Gas HHO merupakan energi alternatif yang dapat menggantikan sumber energi fosil. Gas HHO dapat diproduksi dengan beberapa cara termasuk elektrolisis air. Dalam penelitian ini peneliti menggunakan metode elektrolisis air sumur menggunakan katalis NaHCO3 dalam penelitian ini. Peneliti menggunakan variasi jarak antar roda yaitu 2mm, 4mm, dan 6mm. Dari hasil penelitian disimpulkan bahwa waktu yang dibutuhkan untuk memproduksi gas HHO pada 50 pertama adalah yang tercepat pada jarak 2 mm yaitu 95 detik. Sedangkan paling lambat di jarak 6 mm, 123 detik. Laju aliran gas HHO pada jarak 2 mm lebih besar dari pada laju alir pada jarak 4 mm dan jarak 6 mm. Semakin kecil jarak antar pelat maka semakin cepat pula gas HHO yang dihasilkan. Pada saat proses elektrolisis, didapatkan tegangan yang lebih rendah dengan jarak 6 mm yaitu 3,4 volt sedangkan arus terendah diperoleh pada jarak 2 mm yaitu 4,25 ampere. Energi listrik terendah diperoleh pada jarak 2 mm yaitu 50 ml start menggunakan energi 1266,35 joule. Dari beberapa faktor yang mempengaruhi efisiensi generator HHO didapatkan efisiensi tertinggi pada jarak 2 mm yaitu rata-rata 37,90% dan efisiensi terendah pada jarak 6 mm yaitu 20,58%, sehingga diperoleh efisiensi pelat 2 mm. HHO gas is an alternative energy that can replace fossil energy sources. HHO gas can be produced in several ways including water electrolysis. In this study the researchers used the electrolysis method of well water using NaHCO3 catalyst in this study. The researchers used variations in the distance between the wheels, namely 2mm, 4mm, and 6mm. From the research, it was concluded that the time needed to produce HHO gas in the first 50 was the fastest at a distance of 2 mm, which is 95 seconds. While at the latest at a distance of 6 mm, 123 seconds. HHO gas flow rate at a distance of 2 mm is greater than the flow rate at a distance of 4 mm and a distance of 6 mm. The smaller the distance between plates, the faster the HHO gas will be generated. Which is used during the electrolysis process, where the lower voltage is obtained with a distance of 6 mm which is 3.4 volts while the lowest current is obtained at a distance of 2 mm which is 4.25 amperes. The lowest electrical energy is obtained at a distance of 2 mm ie 50 ml starting using energy of 1266.35 joules From several factors that affect the efficiency of the HHO generator, the highest efficiency is found at a distance of 2 mm, which is an average of 37.90% and the lowest efficiency at a distance of 6 mm, which is 20.58%, so that the efficiency is obtained plate 2 mm.
PENENTUAN PARAMETER PROSES PEMBUBUTAN TERHADAP KEKASARAN PERMUKAAN MATERIAL ST 42 DENGAN METODE TAGUCHI Ismail Mansyursyah; Mastiadi Tamjidillah
JTAM ROTARY Vol 2, No 2 (2020): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v2i2.2414

Abstract

Penelitian ini bertujuan untuk mengetahui parameter apa saja yang berpengaruh terhadap kekasaran permukaan pada proses permesinan bubut konvensional dengan material ST 42 dan mengetahui parameter apa saja yang menghasilkan kekasaran permukaan yang baik dengan menggunakan metode Taguchi. Berdasarkan dari penelitian yang telah dilakukan maka diketahui tidak ada parameter yang berpengaruh terhadap kekasaran permukaan material baja ST 42. Parameter yang menghasilkan kekasaran permukaan material baja ST 42 yang paling baik adalah jenis mata pahat JCK dengan feeding 0,115 dan kehalusan 3,42 µm. This study aims to determine which parameters affect the surface roughness of the conventional lathe machining process with ST 42 material and to find out which parameters produce good surface roughness using the Taguchi method. Based on the research that has been done, it is known that there are no parameters that affect the surface roughness of the ST 42 steel material. The parameter that produces the best surface roughness of ST 42 steel material is the type of JCK tool blade with a feeding of 0.115 and a smoothness of 3.42 µm.
Co-Authors Abdul Ghofur Andhika Bayu Oktavianto Andri Purwata Aqli Mursadin Elwas Cahya Wahyu Pribadi Ismail Mansyursyah Juni Eko Hartanto Khairul Sahwan Ma’ruf Rachmat Subagyo Rudi Siswanto, Rudi Taufiq Hidayat