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All Journal Jurnal Energi Dan Manufaktur Rotasi ROTOR: JURNAL ILMIAH TEKNIK MESIN Journal of Mechanical Engineering Science and Technology STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Jurnal Elemen ComTech: Computer, Mathematics and Engineering Applications Abdi Dosen : Jurnal Pengabdian Pada Masyarakat J-Proteksion: Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin JURMA : Jurnal Program Mahasiswa Kreatif JURNAL FLYWHEEL Journal of Fibers and Polymer Composites Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII
Dwi Djumhariyanto
Jurusan Teknik Mesin Fakultas Teknik Universitas Jember Jl. Kalimantan 37 Jember 68121
Religion Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation

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Journal : Journal of Mechanical Engineering Science and Technology

 1 
Optimization of the Number of Cylinder Blades in Coffee Pulper Machine: Finite Element Analysis and Simple Additive Weighting Methods Syahriza, Mochamad Rifki; Djumhariyanto, Dwi; Ilminnafik, Nasrul; Darsin, Mahros; Yudistiro, Danang; Basuki, Hari Arbiantara; Wibowo, Robertoes Koekoeh Koentjoro; Syuhri, Ahmad; Sumarji, Sumarji
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 8, No 2 (2024)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v8i22024p476

Abstract

The increasing interest in coffee in all circles means that coffee production and quality must always increase due to consumer demands. One way to maintain the quality of coffee beans is by breaking them down using a huller machine. This research aims to improve the optimization of coffee machines by modifying the cylinder blades of huller machines with variations of 3, 4, 5, and 7 cylinder blades in terms of static loading design and quality and production capacity of coffee bean breaking. The experiment was carried out using 400 rpm and breaking 10kg of dry coffee cherries every time the sample was taken. The research results show that the best sample collection is the variation of 3 cylindrical blades with the maximum stress and lowest deformation values of 6.67 MPa and 0.000737 mm. In terms of production quality, it shows that the best sampling was the three cylindrical blade variations with 50% whole and good coffee beans. In terms of production capacity, the most significant capacity was the seven cylindrical blade variations with a value of 294.11 kg/hour. Sampling from the four most optimal variations uses the SAW (Sample Additive Weighting) method. The most optimal result from the 4 test criteria, the variation of 3 cylindrical blades is the best because it has the highest score with a value of 0.9754.
Performance Analysis of Alkaline Fuel Cell with Variation of Potassium Hydroxide Concentration in Electrolyte Solution Alfariz, Mohammad Rifqy; Ilminnafik, Nasrul; Djumhariyanto, Dwi; Hardiatama, Intan; Ibnu, Muhammad Khadafi; Nugraha, Raafi Aditya; Freitas, Domingos de Sousa
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 9, No 1 (2025)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v9i12025p103

Abstract

Alkaline Fuel Cell (AFC) is a green energy conversion tool that converts chemical energy into electrical energy through electrochemical reactions. This research aims to analyze the effect of potassium hydroxide (KOH) concentration variation in electrolyte solution on the AFC performance, using nickel and manganese catalysts. The research methods include experiments using various KOH concentrations to determine the optimal concentration to produce the best AFC performance. The voltage and current produced are measured, as well as the calculation of the electrical power and efficiency of the AFC. The results showed that KOH concentration has a significant influence on the performance of AFC. It was found that the optimal KOH concentration produces maximum electrical power and energy conversion efficiency. The highest alkaline fuel cell performance was found at 70% KOH concentration. In addition, the use of nickel and manganese catalysts was shown to improve the stability and efficiency of AFC. The result makes an important contribution to the development of AFC technology, supporting global efforts towards cleaner and more sustainable energy use. The findings also provide a basis for further innovations in AFC design and materials, as well as their potential in practical applications such as electric vehicles and portable power plants
Co-Authors Agung Eko Hadiyoto, Agung Eko Agus Triono Ahmad Adib Rosyadi Ahmad Ayyub Syaiful Rizal Ahmad Khoirul Anwar Ahmad Syuhri Ahmad Wafi Al Wafi, Adib Alfariz, Mohammad Rifqy Alfredo Bayu Satriya Aman Sentosa Aman Sentosa, Aman Andi Sanata Andika Wahyu Prasanko Anuary Dwi Rosyid, Wafa Prasetia Arif Bigwanto Aris Zainul Muttaqin Arya Ramadhanu Arya Ramadhanu, Arya Bambang Sugiharto Danang Yudistiro Dathantara Salmansyah Dedi Dwilaksana Denaldy Elza Setya Elhamzah Digdo Listyadi, Digdo Dwi Rizky Fitria Faizatul Islamiyah Faizatul Islamiyah, Faizatul Freitas, Domingos de Sousa Gaguk Jatisukamto Ghaffar, Jakfat Maulid Hafiz Indratma Yahya Hari Arbiantara Hari Arbiantara Basuki Hari Arbiantara, Hari Haris Dwi Armyanto Hary Sutjahjono Ibnu, Muhammad Khadafi Ilminafik, Nasrul Imam Sholahuddin Intan Hardiatama khoirul fahmi aziz L Rajeshkumar M Arief Hidayat M Arif Wibowo M Dimyati Nashrullah M. R. M. Asyraf Mahros Darsin Mochamad Asrofi Mochamad Edoward Ramadhan Mochamad Trifiananto Muhammad Hafri Evan Tofianto Muhammad Trifiananto Nasrul Ilminafik Nasrul Ilminnafik Nugraha, Raafi Aditya Nur Koyim Kustanto Oktafian Nanda Nusila Pratama, Aly Wafa R. A. Ilyas Rahma Rei Sakura Reza Marinanda Fajar Ridho Unggul Nur Rahmadi Rio Martha Febriana Rossy Ririn Endah Badriani, Ririn Endah Robertoes Koekoeh Koentjoro Wibowo Robertus Sidartawan Rudi Sugara, Imam Salahuddin Junus Santoso Mulyadi Setiawan Okik Aris Sumarji Susanti, Rizqa Putri Syahriza, Mochamad Rifki Triana Lindriati Wibowo, M Arif Wibowo, Robertoes Koekoeh Koentjoro Widjonarko Yuni Hermawan