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All Journal Jurnal Ilmiah Teknologi dan Rekayasa Andalasian International Journal of Applied Science, Engineering, and Technology
Kurniawan, Septian Ari
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Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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RANCANG BANGUN SOLAR TRACKER SUMBU TUNGGAL BERBASIS MOTOR STEPPER DAN REAL TIME CLOCK Kurniawan, Septian Ari; Taufik, Mohammad
Jurnal Ilmiah Teknologi dan Rekayasa Vol 26, No 1 (2021)
Publisher : Universitas Gunadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35760/tr.2021.v26i1.3685

Abstract

Energi matahari merupakan sumber energi terbarukan yang dapat dikonversi menjadi listrik. Salah satu cara yang paling umum digunakan adalah menggunakan fotovoltaik (PV). Namun, hambatan terbesar dari penggunaan PV adalah efisiensi konversi yang rendah. Salah satu solusi untuk mengatasi hambatan tersebut adalah menggunakan solar tracker. Solar tracker adalah sebuah perangkat yang dapat membantu panel surya untuk memaksimalkan penangkapan radiasi matahari dengan cara membuat panel surya selalu menghadap (tegak lurus) matahari. Penelitian ini menitikberatkan pada pembuatan purwarupa solar tracker sumbu tunggal dan membandingkan kinerjanya dengan panel surya statis. Pengujian peningkatan efisiensi diwakilkan dengan pengukuran tegangan open circuit (VOC) dan arus short circuit (ISC) untuk kedua panel. Purwarupa solar tracker sumbu tunggal yang dibuat menggunakan sebuah motor stepper KS42STH40-1204A yang bergerak sesuai dengan pewaktuan real time clock (RTC) DS3231. Nilai VOC yang diperoleh, menunjukkan terjadi peningkatan sebesar 4,83% pada solar tracker dibandingkan dengan panel surya statis, sedangkan nilai ISC pada solar tracker lebih rendah 11,11% dibandingkan dengan panel surya statis.
A Comparison of Polyol Ester and Mineral Oil under Thermal Aging Rajab, Abdul; Kamil, Insannul; Kamarol Mohd Jamil, Mohamad; Kurniawan, Septian Ari; Rohadi, Nanang; Emiliano, Emiliano
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 2 (2025): July 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i02.231

Abstract

Insulating oil was historically dominated by mineral oil due to its cost-effectiveness and good properties. However, the limitations of mineral oil, particularly its availability and environmental concerns, present significant long-term operational risks. Polyol esters, synthesized through specific chemical processes, demonstrate biodegradability and operational safety. This research evaluates the electrical, physical, and chemical properties of both oil types, focusing on parameters such as breakdown voltage, water content, acidity, viscosity, and density. Results indicate that polyol ester oils exhibit a more stable breakdown voltage and better moisture management due to higher water absorption capacity, and greater density stability and viscosity even after prolonged thermal aging. Despite a more pronounced increase in acidity, polyol ester oils positioning as a promising and sustainable alternative for long-term use in oil-filled electrical equipment such as transformers. This aligns with industry objectives for enhanced environmental sustainability and operational reliability.
Co-Authors Abdul Rajab Emiliano, Emiliano Insannul Kamil, Insannul Kamarol Mohd Jamil, Mohamad Mohammad Taufik Nanang Rohadi, Nanang