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All Journal Community Empowerment Jurnal Mesin Nusantara Journal of Mechanical Engineering, Science, and Innovation IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA)
Hernando, Ivan Christian
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Aerospace Engineering Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation

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Utilization of cow dung as a biogas raw material for alternative energy in Buddagan 1 Hamlet, Kabupaten Pamekasan Anggono, Willyanto; Hernando, Ivan Christian; Tulistyantoro, Lintu
Community Empowerment Vol 10 No 4 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ce.12543

Abstract

Buddagan 1 Hamlet, Pamekasan Regency, faces the problem of cow dung waste piling up around the house, causing an unpleasant odor and unhygienic kitchen conditions. The proximity of the cow shed to the kitchen, coupled with the status of a heritage village that requires a solution without changing the building structure, demands an innovative approach. Therefore, this community service aims to apply biogas technology to utilize cow dung waste as an alternative energy source, improve environmental cleanliness, and reduce household expenses. Community service activities include socialization of biogas technology, training on use and maintenance, as well as installation and evaluation assistance. As a result, biogas technology was successfully implemented, meeting cooking gas needs, reducing household costs, and producing organic fertilizer. Socialization, training, and ongoing assistance ensure the operational success of biogas technology. Buddagan 1 Hamlet is now an inspiring example of environmentally friendly livestock waste management.
Comparative Performance of Material Extrusion and Vat Photopolymerization Systems for Automotive Product Tanoto, Yopi Yusuf; Sugiarto, Nicholas Adriel; Hernando, Ivan Christian; Anggono, Willyanto
Journal of Mechanical Engineering, Science, and Innovation Vol 5, No 2 (2025): (October)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2025.v5i2.8201

Abstract

Additive Manufacturing (AM) has emerged as a rapidly developing technology with applications ranging from product visualization and prototype fabrication to actual production. Various types of AM are available on the market, broadly categorized into industrial-grade and consumer-grade machines. This study focuses on consumer-grade printers, which are more affordable and widely accessible. Among these, the two most commonly used technologies are Material Extrusion (ME) and Vat Photopolymerization (VP). While the performance of ME printers has been widely investigated, comparative studies between ME and VP remain limited. This research provides a performance comparison of the two technologies. The findings indicate that VP printers outperform ME in terms of printing speed and energy efficiency. On the other hand, FDM printers offer advantages in material cost and dimensional accuracy in the Z direction. Furthermore, the study examines the potential of consumer-grade printers to support automotive product prototyping efficiently and practically.
Pengaruh Tekanan Pemadatan terhadap Karakteristik Pembakaran Briket Limbah Sabut Kelapa sebagai Bahan Bakar Biomassa Alternatif Hernando, Ivan Christian; Anggono, Willyanto; Yuke, Stevanus
Jurnal Mesin Nusantara Vol 8 No 2 (2025): Jurnal Mesin Nusantara
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jmn.v8i2.26043

Abstract

Peningkatan kebutuhan energi di tengah keterbatasan sumber daya fosil mendorong pengembangan energi alternatif yang berkelanjutan, salah satunya melalui pemanfaatan biomassa dalam bentuk briket. Penelitian ini bertujuan untuk menganalisis potensi limbah sabut kelapa (coconut fiber) sebagai bahan baku briket biomassa dan membandingkannya dengan biji bintaro (Cerbera manghas) yang menggunakan perekat tapioka, serta mengevaluasi pengaruh tekanan pemadatan terhadap karakteristik pembakarannya. Briket dibuat dari 100% sabut kelapa dengan perekat tapioka, kemudian dipadatkan pada tekanan 1 MPa dan 2 MPa. Pengujian nilai kalor dilakukan menggunakan Parr Oxygen Bomb Calorimeter, sedangkan uji pembakaran dilakukan untuk mengetahui waktu penyalaan, temperatur, dan durasi pembakaran. Seluruh pengujian dilakukan dengan tiga kali replikasi. Hasil menunjukkan bahwa briket dari limbah sabut kelapa memiliki nilai kalor tertinggi, yaitu 4741 kkal/kg, lebih tinggi dibandingkan briket campuran 90% biji bintaro dan 10% tapioka yang menghasilkan 4164 kkal/kg. Uji pembakaran menunjukkan bahwa briket yang dipadatkan pada tekanan 2 MPa memiliki durasi pembakaran lebih lama (1433 detik) dan temperatur sedikit lebih tinggi (66,5 °C) dibandingkan tekanan 1 MPa, meskipun memerlukan waktu penyalaan yang lebih lama. Temuan ini mengindikasikan bahwa peningkatan tekanan pemadatan menghasilkan struktur briket lebih rapat dan pembakaran lebih stabil. Secara keseluruhan, limbah sabut kelapa berpotensi tinggi sebagai bahan bakar biomassa alternatif yang efisien dan berkelanjutan.
Optimasi Persediaan untuk Ketersediaan Perkakas Kerja di Bengkel Otomotif Pratomo, Hariyo P. S.; Hernando, Ivan Christian; Rudijanto, Matthew Jeffrey; Tandio, Joseph Wicaksono
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.342

Abstract

Automotive workshops commonly face inefficiencies in special-tool availability due to manual and non-transparent tracking systems. This study addresses this challenge by examining the impact of limited tool quantities on operational performance, particularly the low average service level (86.18% vs. the 95% target). This study is among the first to integrate a digital tool management system with quantitative inventory-optimization methods, i.e., Safety Stock and Cost-Benefit Analysis (CBA), in an automotive workshop context. Borrowing-transaction records collected over 60 days were analyzed to identify critical tools with the highest demand variability. Although most tools achieved full availability, 15 high-demand tools contributed to reduced overall service level and were therefore prioritized in the optimization process. Application of Safety Stock analysis recommended ideal inventory quantities, while CBA revealed diminishing-return thresholds, preventing unnecessary investment. Key improvements include increasing service level from 71.27% to 99.51% and enhancing cost efficiency to 89.04%. The combined digital recording system and quantitative optimization framework have proved highly effective in improving tool availability and reducing operational costs. This approach offers a scalable model for automotive workshops seeking to enhance efficiency and sustainability through data-driven tool-management strategies.
Co-Authors Lintu Tulistyantoro Pratomo, Hariyo P. S. Rudijanto, Matthew Jeffrey Sugiarto, Nicholas Adriel Tandio, Joseph Wicaksono Tanoto, Yopi Yusuf Willyanto Anggono Yuke, Stevanus