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All Journal Jurnal Energi Dan Manufaktur Jurnal Mechanical Turbo : Jurnal Program Studi Teknik Mesin Jurnal Elementer (Elektro dan Mesin Terapan) Infotekmesin Scientific Journal of Mechanical Engineering Kinematika Jurnal Pengabdian Kepada Masyarakat Ungu ( Abdi Ke Ungu) ARMATUR : Artikel Teknik Mesin dan Manufaktur Open Science and Technology Jurnal Bakti Masyarakat Manajemen Jurnal Polimesin Jurnal Rekayasa Proses Prosiding SNTTM Nemui Nyimah
Ahmad Yonanda
University Of Lampung
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Public Health Other

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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.
Evaluasi kinerja pengering hybrid berbasis pemanas listrik dan tungku biomassa untuk pengeringan biji kakao Harmen; Prayitno, Hadi; Fitriawan, Helmy; Irsyad, Muhammad; Amrul; Yonanda, Ahmad
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/mdj4sj85

Abstract

Pengering hybrid yang digunakan dalam penelitian ini memanfaatkan sumber panas dari pemanas listrik berbasis energi mikrohidro (PLTMH) dan tungku biomassa menggunakan limbah kayu jati. Penelitian bertujuan mengevaluasi kinerja pengeringan biji kakao dengan sistem hybrid. Metode penelitian meliputi pengukuran temperatur udara masuk dan keluar, kecepatan aliran udara, massa biji kakao, serta kadar air akhir. Analisis dilakukan dengan menghitung energi masuk (Qin), energi terserap (Qout), dan energi hilang (Qloss) menggunakan persamaan termodinamika. Hasil penelitian menunjukkan konsumsi energi listrik sebesar 59.114,9 kJ dan biomassa limbah kayu jati sebesar 456.451 kJ. Energi yang masuk tercatat 26.469,9 kJ, energi terserap 6.534,1 kJ, sedangkan energi hilang mencapai 19.935,8 kJ, dengan panas keluar ruang pengering 9.266,4 kJ. Temuan ini memberikan informasi penting untuk meningkatkan efisiensi pengeringan tipe flat bed dryer pada biji kakao, sekaligus mendukung pengembangan metode pengeringan yang lebih optimal dan berkelanjutan.
EXPERIMENTAL STUDY OF PARAFFIN-BASED PCM THERMAL STABILITY AFTER REPEATED THERMAL CYCLES FOR ENERGY STORAGE APPLICATIONS Dondi Kurniawan; Muhammad Irsyad; Apri Wiyono; Ahmad Yonanda; Angga Darma Prabowo; Ardika Kusuma
Scientific Journal of Mechanical Engineering Kinematika Vol 11 No 1 (2026): SJME Kinematika June 2026
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v11i1.836

Abstract

Paraffin-based phase change materials (PCMs) have great potential in thermal energy storage due to their ability to absorb and release energy during the freezing and melting processes. However, the stability of their thermal characteristics after undergoing repeated heating and cooling cycles remains a challenge for long-term applications. This study aims to evaluate the phase change temperature characteristics and latent heat capacity of paraffin after undergoing 0, 200, 400, and 600 repeated thermal cycles using Differential Scanning Calorimetry (DSC) and T-history tests. The test results show that despite a slight decrease in freezing, melting temperatures changes in chemical structure after a number of cycles, paraffin still maintains its capacity to absorb and release energy quite efficiently. The latent heat capacity decreased from 142.77 J/g to 126.02 J/g over 600 cycles during the melting process. However, during the freezing process, it increased from 139.25 J/g to 147.55 J/g. These findings provide a scientific basis for optimizing paraffin-based PCM for reliable and sustainable thermal energy storage applications.
Analisa Suhu Pembakaran Sampah Kering Sebagai Potensi Energi Panas Untuk Proses Pengeringan Angga Darma Prabowo; Hadi Prayitno; Dondi Kurniawan; Martinus; Ahmad Yonanda
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.10423

Abstract

Waste management poses a significant environmental challenge, yet dry waste holds potential as a renewable energy source through Waste-to-Energy (WTE) technology. This study aims to analyze the potential of utilizing heat from dry waste combustion for drying applications using a hybrid approach of experimental methods and Computational Fluid Dynamics (CFD) simulation. The experimental stage was conducted by burning dry waste in a furnace to obtain the average hot gas temperature, which was measured at 295.33°C. This value was then used as a boundary condition in the CFD simulation of an integrated heat exchanger system within the furnace. Air at a temperature of 30°C was flowed into the heat exchanger with four mass flow rate variations (0.087, 0.092, 0.126, and 0.165 kg/s). The simulation results show that the system is capable of heating the air to a temperature range of 46.05°C to 58.05°C, which is ideal for drying applications. An inverse relationship was found between the mass flow rate and the outlet temperature, where a lower flow rate results in hotter air. This research proves that the heat recovery system from dry waste combustion is technically feasible and has the potential to be a sustainable alternative energy solution for drying processes.
Co-Authors A.Yudi Eka Risano, A.Yudi Eka Agus Sugiri, Agus Ahmad Riszal Ahmad Suudi Akhmad Riszal Amrizal Amrizal Amrizal Amrizal Amrizal Amrizal Amrizal Amrizal Nalis Amrul Amrul Amrul Angga Darma Prabowo Angga Darma Prabowo Apri Wiyono Ardika Kusuma Aziz, Qithfirul David Sinaga Dedy Prasetyo Dondi Kurniawan Dondi Kurniawan Effendi, M. Fadhly Hadi Prayitno Hadi Prayitno, Hadi Hakim, Naufal Harmen Harmen Harmen Harmen Harmen Harmen Harmen Harmen, Harmen Helmy Fitriawan Ibrahim, Fauzi Junidy, Muhammad Raihan Khairudin, Rizal Kurniawan, Dondi M. Haviz M. Irsyad Marsyad, Hardoyo Martinus Martinus Martinus, Martinus Muhammad Irsyad Muhammad Irsyad Muhammad Irsyad Nalis, Amrizal Nugraha, Nurcahya Nugraha, Yulian Ramadani, Tri Topan Riszal, Akhmad Riszal, Akmad Rizal Khairudin Sabiqunassabiqun Sagala, Surya Jonathan Setiawan, Ahmad Adi Sinaga, David Sinaga, Jorfri B. Sinaga, Jorfri Boike Sinaga, Jorfri Boyke Sugiman Yeni Elisdiana