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All Journal Traksi : Majalah Ilmiah Teknik Mesin Rotasi Jurnal Teknik Rekayasa Mesin LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Indonesian Journal of Science and Technology JMPM (Jurnal Material dan Proses Manufaktur) Turbo : Jurnal Program Studi Teknik Mesin Machine : Jurnal Teknik Mesin SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan at-tamkin: Jurnal Pengabdian kepada Masyarakat Journal TEPAT: Teknologi Terapan untuk Pengabdian Masyarakat Jurnal Fisika : Fisika Sains dan Aplikasinya ARMATUR : Artikel Teknik Mesin dan Manufaktur Jurnal Pengabdian Vokasi Jurnal Polimesin
Muhamad Jafri
Universitas Nusa Cendana
Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Journal : Rotasi

 1 
Pengaruh Diameter Katup Pengantar Dan Tinggi Angkat Terhadap Efisiensi Pompa Hidram 3 Inci Jafri, Muhamad; Nurhayati, Nurhayati; Rimas, Dedy Isman
ROTASI Vol 23, No 1 (2021): VOLUME 23, NOMOR 1, JANUARI 2021
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.23.1.6-12

Abstract

This study aims to analyze the effect of valve diameter and delivery head on hydram pump. The method used is experiment on specimens, and analysis using mathematical equations in hydram pump theory. The data measured are the flow of water in, discharge of waste water, and discharge of water out. The independent variables in this study were the diameter of the introductory valve, namely 2.0 inches, 2.25 inches, 2.50 inches, 2.75 inches, and delivery head, namely 3 m, 5 m, 7 m. Furthermore, analysis of the head loss and the efficiency of the D'Aubuisson hydram pump was carried out. The results showed that the diameter of the delivery valve and the delivery head had an effect on the effect of the hydram pump. The highest hydram pump occurs at a delivery valve diameter of 2.5 inches and a delivery head of 5 m at 55.21%. While the lowest occurred at a delivery head of 3 m and a diameter of 2.0 inch delivery valve at 13.75%.
Studi Kinerja Teoritis Batch Air Blast Freezer yang Menggunakan Refrigeran R290 dan R600a Sebagai Pengganti R404 Dwinanto, Matheus
ROTASI Vol 22, No 4 (2020): VOLUME 22, NOMOR 4, OKTOBER 2020
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.22.4.253-259

Abstract

Batch air blast freezer telah digunakan sebagai cara pembekuan cepat di unit pengolahan ikan sebelum dibekukan untuk waktu yang lama di dalam cold storage. Untuk itu penggunaan refrigeran hidrokarbon yang lebih ramah lingkungan telah menjadi tuntutan dan isu sentral pada masa yang akan datang. Makalah ini menyajikan studi kinerja teoritis penggunaan R290 dan R600a sebagai pengganti R404A di batch air blast freezer. Kinerja teoritis sistem didasarkan pada variasi temperatur evaporasi menggunakan perangkat lunak CoolPack dengan temperatur kondensasi dipertahankan konstan. Besaran-besaran penting yang dianalisis adalah laju aliran massa, rasio tekanan, temperatur keluar kompresor, pelepasan kalor, konsumsi daya, dan koefisien kinerja. Hasilnya menunjukkan bahwa pada temperatur evaporator minimum, kinerja sistem yang menggunakan R290 dan R600a rata-rata lebih tinggi ±14% dibandingkan dengan R404A dan R507A. R290 memiliki karakteristik yang lebih dekat pada R404A dan R507A sehingga lebih sesuai menggantikan kedua refrigeran tersebut dibandingkan dengan R600a. Namun, ini adalah analisis teoritis sistem yang dapat mengarah pada kinerja yang lebih tinggi daripada kondisi normal.
Analisis Efisiensi Panel Surya Menggunakan Reflektor Dan Sistem Pendingin Berbasis Mikrokontroler Muhamad Jafri
ROTASI Vol 25, No 2 (2023): VOLUME 25, NOMOR 2, APRIL 2023
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.25.2.61-69

Abstract

The addition of reflectors to solar panels to redirect solar radiation onto the panel surface can lead to increased surface temperatures. Excessive temperature rise significantly impacts the power output. The implementation of a microcontroller-based cooling system can optimize the temperature on the solar panel surface. The research employs an experimental method on four test media, namely solar panels with reflectors at angles of 45° and 60°, with the addition of a microcontroller-based cooling system, solar panels without reflectors with a cooling system, and solar panels without reflectors or cooling system (as the control). The aim of this study is to determine the efficiency of solar panels using reflectors and a microcontroller-based cooling system. The test results indicate that the intensity of light and temperature also affect the generated power. The microcontroller-based cooling system applied to the solar panel maximizes the power output and efficiency. The solar panel using a 60° reflector with cooling produces a power output of 14.10 Watt with an efficiency of 15.9%, while the solar panel using a 45° reflector produces a power output of 14.07 Watt with an efficiency of 15.4%. The solar panel without a reflector but with a cooling system produces a power output of 13.31 Watt with an efficiency of 14.4%, which is higher than the solar panel without a reflector or cooling system, which only produces a power output of 11.264 Watt with an efficiency of 12.1%.
Co-Authors Alfarisi, Figo Jafri Alionvember R. Thei Aloysius Meo Aloysius V.P. Piamat Ankira E. N. Saputro Apriyanto Banamtuan Arifin Sanusi Bale, Jefri Semuel Ben V. Tarigan Ben V. Tarigan Ben V. Tarigan Ben Vasco Tarigan Ben Vasco Tarigan Charles Silla Daud P. Mangesa Defmit B.N. Riwu Djoe, Daniel Marwill Dominggus Godlief Heryson Adoe Elfridus Bruno Lake Erich Maliwemu, Erich Erkes Lodoh Fransiskus Sogen Gusnawati Gusnawati Gusnawati, Gusnawati Hairman Sahrudin Lanae Ishak Limbong Jahirwan Ut Jasron Jefri Semuel Bale Konstantianus Mone Kristianus Yosafat Goab Kristomus Boimau Kristomus Boimau Lede, Agustinus Syrillus Umbu Margaretha Kewa Unarajan Matheus M. Dwinanto Mohamad Fajri Nabuasa, Meinase K Noveryandy Muda Nurhayati Nurhayati Nurhayati Nurhayati Nurhayati Oematan, Abraham Pardiono, Tri Ramadhani Pell, Yeremias M. Philipus Andreas Rima Nindia Selan Rimas, Dedy Isman Sakaria Koli Sanusi, Arifin Sanusi, Arifin Selan, Rima Senu, Stefanus Stef Siagian, Saut Ronny Tuah Soni A Kaban Stefanus Neno Suparlan, Maria D.C. Tarigan, Ben V Tarigan, Ben V. Verdy A Koehuan Verdy A. Koehuan Wangge, Gusti F.X. Wara Wenseslaus Bunganaen Yakub M. Lanata Yeremias M. Pell Yohanes V. Gere Zakharias S. Nady