Article Per Year (5 Year)
p-Index From 2021 - 2026
2.012
P-Index
This Author published in this journals
All Journal ROTOR: JURNAL ILMIAH TEKNIK MESIN Jurnal Teknik JURNAL CRANKSHAFT Abdimas Universal Jurnal Mekanik Terapan Jurnal Abadimas Gorontalo ARMATUR : Artikel Teknik Mesin dan Manufaktur Sibatik Journal : Jurnal Ilmiah Bidang Sosial, Ekonomi, Budaya, Teknologi, Dan Pendidikan Jurnal Pengabdian Masyarakat Aufa (JPMA) Industrial Research Workshop and National Seminar
Yongki Christandi Batubara
Unknown Affiliation
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Transportation Other

Published : 12 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 12 Documents
Search

 1   2 
Analisis pengaruh koefisien konveksi media pendingin terhadap temperatur panel surya dengan perendaman sebagian (Partially Submerged Photovoltaic) Rijal Surya Rahmany; I Made Ivan Wiyarta Cakra Sujana; Yongki Christandi Batubara
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.v7i1.10902

Abstract

One of the main challenges in PV system deployment is the increase in panel operating temperature, which leads to a reduction in energy conversion efficiency, particularly in tropical regions with high solar irradiance. Potential solution to mitigate this issue is the partially submerged photovoltaic (PSPV) system. This study aims to analyze the influence of convective heat transfer coefficients on the surface of a PSPV system on the operating temperature of photovoltaic panels using a numerical modeling approach. The research methodology involves the development of an energy balance model that accounts for the contributions of solar radiation, convective heat transfer, and thermal radiation. The panel area is divided into two equal sections with a 50:50 ratio, consisting of a submerged portion and an air-exposed portion. The convective heat transfer coefficients for the submerged section are set to 100 W/m²K for both the upper and lower surfaces. For the air-exposed section, the upper surface convective heat transfer coefficient is varied between 10 and 70 W/m²K, while the lower surface coefficient is maintained at 10 W/m²K. Simulation results indicate that the presence of water as a cooling medium significantly reduces the panel operating temperature to approximately 31 °C, compared to a fully air-exposed panel configuration, which reaches an operating temperature up to around 55 °C.
Analisis Pengaruh Variasi Katalis CaO Dari Tulang Sapi Terhadap Konversi Minyak Jelantah Menjadi Biodiesel Melalui Transesterifikasi Sidabutar, Elizabeth Desfelia Ciciolini; Vanessa Keysia Imanuella Mampow; Zain Achmad Kahfi; Arturito Tri Setiawan; Hendrik Vicarlo Saragih Manihuruk; Arini Anestesia Purba; Yongki Christandi Batubara; Fika Dwi Oktavia; Rizqy Romadhona Ginting; Naufal Rakha Ramdhani
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 25 No 1 (2026): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol25no1.823

Abstract

Produksi biodiesel dari minyak jelantah masih menghadapi kendala akibat tingginya kandungan asam lemak bebas (free fatty acid, FFA) yang dapat memicu reaksi saponifikasi dan menurunkan efektivitas katalis. Penggunaan katalis heterogen CaO berbasis limbah tulang sapi menjadi alternatif potensial karena memiliki toleransi lebih baik terhadap FFA. Penelitian ini bertujuan menganalisis pengaruh rasio molar metanol:minyak 5:1 dan 12:1, suhu kalsinasi katalis CaO 800°C dan 1000°C, waktu kalsinasi 3, 5, dan 7 jam, serta konsentrasi katalis 4 wt% dan 6 wt% terhadap yield biodiesel dari minyak jelantah. Katalis CaO disintesis dari tulang sapi melalui proses kalsinasi dan digunakan pada reaksi transesterifikasi selama 1 jam. Yield biodiesel digunakan sebagai indikator utama untuk mengevaluasi pengaruh parameter kalsinasi dan kondisi transesterifikasi. Hasil menunjukkan bahwa rasio molar 12:1 menghasilkan konversi lebih tinggi dibandingkan 5:1. Kondisi optimum diperoleh pada suhu kalsinasi 1000°C selama 5 jam dengan konsentrasi katalis 4–6 wt%, menghasilkan yield maksimum sebesar 73%. Peningkatan yield dari 46% menjadi 73% menunjukkan bahwa suhu kalsinasi yang lebih tinggi meningkatkan pembentukan CaO aktif dan situs basa O²⁻ yang berperan dalam pembentukan ion metoksida selama reaksi transesterifikasi. Katalis CaO berbasis tulang sapi efektif untuk produksi biodiesel tanpa esterifikasi awal.
Co-Authors Alfandy, Alev Putra Amalia Nur Kumalaningrum Arini Anestesia Purba Arista, Yuvita Lira Arturito Tri Setiawan Attila, Muhammad Rayes Deendarlianto Devy Setiorini Sa’adiyah Drajat Indah Mawarni Fika Dwi Oktavia Haliq, Ridwan Haryono, Hadhimas Dwi Hendrik Vicarlo Saragih Hendrik Vicarlo Saragih Manihuruk Hidayat, Dinda Khoirunnisa I Made Ivan Wiyarta Cakra Sujana Indarto - Julian, Lindra Rahmad Rizqi Kholiq Deliasgarin Radyantho Kumalaningrum, Amalia Nur Manta, Faisal Margyanto, Ageng Marshantya, Defiana Michael Alexander Hutabarat Naufal Rakha Ramdhani Rajagukguk, Grendy Ary Krishna Rijal Surya Rahmany Rizqy Romadhona Ginting Saputra, Ferry Adi Sidabutar, Elizabeth Desfelia Ciciolini Stofani, Dhio Suanggana, Doddy Suisman, Kelvin Febriano Wiranata Sujana, I Made Ivan Wiyarta Cakra Syaharani, Destyana Putri Vanessa Keysia Imanuella Mampow Yasin, Hamzah Ibnu Yuike, Ariesta Yuvita Lira Vesti Arista Zain Achmad Kahfi Zufadli, Muhammad Syahmi