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All Journal Turbo : Jurnal Program Studi Teknik Mesin Yumary: Jurnal Pengabdian kepada Masyarakat Aurelia: Jurnal Penelitian dan Pengabdian Masyarakat Indonesia Eduvest - Journal of Universal Studies JR : Jurnal Responsive Teknik Informatika Jurnal Polimesin Jurnal Responsive Teknik Informatika Nemui Nyimah
Harmen, Harmen
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Neuroscience Social Sciences Other

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Experimental evaluation of the thermal and exergy performance of a flat spiral-tube receiver for a parabolic dish collector Yonanda, Ahmad; Junidy, Muhammad Raihan; Irsyad, Muhammad; Amrizal, Amrizal; Harmen, Harmen; Kurniawan, Dondi; Prabowo, Angga Darma
Jurnal Polimesin Vol 23, No 6 (2025): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i6.7557

Abstract

Global dependence on fossil fuels continues to drive the search for cleaner, more sustainable energy sources. One promising technology is the Parabolic Dish Collector (PDC), harnessing concentrated solar energy. The receiver in a PDC is pivotal to overall thermal efficiency and useful energy output. This study evaluates the thermal and exergy performance of a manufactured flat spiral-tube receiver designed to enhance heat transfer. Experiments were conducted under tropical condition between 10:00 and 14:00 local time at three volumetric flow rates (0.5, 0.8, and 1.1 LPM). The 0.5 LPM flow rate yielded the best performance, with a fluid temperature rise up to 43.8°C, a thermal efficiency of 39.1%, and a peak exergy efficiency of 1.1%. The spiral geometry improved fluid residence time, enabling more effective heat absorption. These findings demonstrate that a simple, manufactured spiral tube receiver can improve PDC performance, offering an efficient and cost-effective solution for solar thermal systems.
Evaluasi Termal Heatsink dengan Variasi Arah Aliran pada Sirip Vertikal dan Sirip Bersegmen untuk Pendinginan Pasif Photovoltaic Yonanda, Ahmad; Aziz, Qithfirul; Amrizal, Amrizal; Irsyad, Muhammad; Riszal, Akmad; Harmen, Harmen
TURBO [Tulisan Riset Berbasis Online] Vol 14, No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i2.4549

Abstract

Penurunan kinerja modul Photovoltaic (PV) akibat meningkatnya temperatur permukaan masih menjadi tantangan utama yang membatasi efisiensi konversi energi listrik. Salah satu solusi yang potensial adalah menambahkan heatsink pada bagian bawah modul sebagai media pelepas panas. Penelitian ini bertujuan menganalisis sekaligus membandingkan kinerja termal heatsink dengan konfigurasi sirip vertikal dan sirip bersegmen terhadap variasi arah aliran udara. Simulasi numerik dilakukan menggunakan ANSYS Fluent (CFD) melalui beberapa tahapan: perancangan geometri PV dan heatsink, pembuatan mesh, penentuan boundary condition, serta pengujian variasi sudut aliran udara sebesar 0°, 22,5°, 45°, 67,5°, dan 90° dengan kecepatan 2 m/s. Hasil simulasi menunjukkan bahwa heatsink dengan sirip bersegmen mampu menurunkan temperatur maksimum permukaan PV hingga 3 °C (5,6%) dibandingkan sirip vertikal pada sudut aliran 0°. Selain itu, perubahan sudut aliran memberikan pengaruh lebih besar pada sirip vertikal dengan selisih temperatur rata-rata 1,7 °C, sementara pada sirip bersegmen hanya 0,5 °C. Temuan ini menegaskan bahwa konfigurasi sirip bersegmen lebih adaptif terhadap dinamika arah aliran udara, sehingga berpotensi diterapkan pada kondisi nyata dengan karakteristik angin berubah-ubah. Nilai kebaruan (novelty) penelitian ini terletak pada pemodelan numerik yang secara langsung membandingkan kinerja sirip vertikal dan sirip bersegmen terhadap variasi arah aliran — topik yang masih jarang dilaporkan dalam studi pendinginan pasif PV.
Sosialisasi Teknologi Pengering Hasil Perkebunan Berbasis PLTMH di Pesawaran Indah Harmen, Harmen; Fitriawan, Helmy; Irsyad, Muhammad; Prayitno, Hadi
Yumary: Jurnal Pengabdian kepada Masyarakat Vol 6 No 1 (2025): September
Publisher : Penerbit Goodwood

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35912/yumary.v6i1.5251

Abstract

Purpose: The purpose of this community service program in Pesawaran Indah Village is to introduce sustainable drying technology powered by Micro-Hydro Power Plants (PLTMH) to improve the efficiency and quality of post-harvest processing in the village's coffee, cocoa, clove, and nutmeg farming sectors. Methodology: The program utilized a community-based approach that involved socializing the benefits of PLTMH-powered drying technology, determining strategic locations for its implementation, and constructing a drying machine with a capacity of 4 x 20 kg. The program also focused on enhancing the community's knowledge of energy sources and drying techniques through workshops and discussions. Results: The program successfully increased community awareness of energy-efficient drying technology, with understanding rising from 20% to 80%. The construction of the drying machine was completed, and the community was encouraged to adopt this technology, which is expected to enhance agricultural product quality, promote sustainable energy use, and empower local farmers. Conclusion: The program effectively introduced a sustainable technology that supports local agricultural practices and promotes the use of renewable energy. The adoption of this technology is expected to benefit the community by improving post-harvest processing and increasing the value of agricultural products. Limitations: The program's scope was limited to a small-scale implementation, and further efforts are needed to monitor its long-term impact on product quality and community adoption. Contribution: This community service program contributes to promoting sustainable agricultural practices and renewable energy use in rural communities, offering a model for enhancing local economic development through appropriate technology.
Co-Authors A.Yudi Eka Risano, A.Yudi Eka Abd Basith, Abd Ahmad Yonanda Ahmad Yonanda Amrizal Amrizal Amrul , Amrul Angga Darma Prabowo Ayu, Zelda Puspa Azis, Moh. Rosifaul Aziz, Qithfirul Basriadi, Ali Firnam, Firnam Hadi Prayitno Hadi Prayitno, Hadi Hakim, Naufal Helmy Fitriawan Herasmus, Hilda Junidy, Muhammad Raihan Kurniawan, Dondi Larisang M. Haviz Martinus, Martinus Muhammad Irsyad Nasrillah, Nasrillah Riszal, Akhmad Riszal, Akmad Saro, David Sinaga, Jorfri Boyke Subuh Tugiono, Subuh Taslimahudin, Taslimahudin Y, Aprizal