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Asri, Rishal
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Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering

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Desain Pembangkit Listrik Tenaga Surya Bifacial: Pendekatan Sudut Inklinasi Dhiyah Ayu, Haogqea; Asri, Rishal; Yunesti, Putty
Infotekmesin Vol 15 No 2 (2024): Infotekmesin, Juli 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i2.2352

Abstract

In this era, energy demand is increasing along with population growth and technological development. Energy is a basic need, and its availability is decreasing, necessitating renewable energy sources like solar energy. However, the current use of solar Photovoltaic (PV) relies only on one side. In this study, the bifacial method is used in solar power plants (PLTS) to reduce conventional energy consumption by identifying the relationship between the tilt angle and internal shading that affects the performance of bifacial photovoltaics. The PLTS system is designed with inclination angles of 8, 15, and 20 to minimize shading and maximize efficiency. PVsyst simulation results show that an 8 angle produces 22868 kWh/year, a 15 angle produces 22724 kWh/year, and a 20 angle produces 22464 kWh/year. Shading affects energy production, but the 8 angle has the lowest power reduction. Choosing the right inclination angle can improve PLTS efficiency and performance.
Studi Pengaruh Metode Pengendalian Motor Terhadap Konsumsi Energi Pada Sistem Cooling Tower Meilani Putri, Andina; Asri, Rishal; Yunesti, Putty
Infotekmesin Vol 16 No 2 (2025): Infotekmesin: Juli 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i2.2796

Abstract

Cooling tower fan motors commonly still operate using a direct-on-line (DOL) system with constant speed, which leads to high energy consumption. This study aims to compare the energy consumption between the DOL system and the variable speed drive (VSD), as well as to evaluate their economic feasibility. A quantitative approach is applied through operational data analysis and simulations using MATLAB Simulink. Two operating scenarios are tested: full operation using DOL and using VSD. The simulation results showed that VSD was able to reduce energy consumption by 22.08 without reducing cooling efficiency. The economic evaluation is carried out through a payback period analysis based on investment costs and annual energy savings. These findings demonstrate that VSD is economically viable and can be gradually implemented as an energy efficiency strategy in high-load cooling systems.
Co-Authors Dhiyah Ayu, Haogqea Meilani Putri, Andina Yunesti, Putty