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All Journal Jurnal ULTIMA Computing Journal Of Sustainability Perspectives Journal of Sustainability Perspectives
Prastomo, Niki
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Computer Science & IT Control & Systems Engineering Education Engineering Environmental Science Public Health

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Micro-Scale CPV Performance Enhancement through V-Trough Concentration and Passive Cooling Robert, Nicholas; Paramasatya, Johanes Dimas; Prastomo, Niki
ULTIMA Computing Vol 17 No 1 (2025): Ultima Computing: Jurnal Sistem Komputer
Publisher : Faculty of Engineering and Informatics, Universitas Multimedia Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31937/sk.v17i1.4206

Abstract

The global reliance on fossil fuels has driven the need for clean, renewable alternatives. Concentrated Photovoltaic (CPV) systems offer a promising solution by increasing energy yield per unit area, particularly in regions with high solar irradiance. This study investigates the performance enhancement of a micro-scale CPV system through the integration of a V-trough optical concentrator and passive thermal regulation mechanisms. Five system variants were developed and tested: a baseline with no enhancement, a standard CPV, and three CPV systems incorporating heat sinks, heat pipes, and a hybrid of both. Optical simulations were performed to achieve a 2× concentration ratio using planar mirrors angled at 60°, while all cooling systems relied on passive methods to maintain simplicity and low cost. Field tests conducted in a tropical environment revealed that all CPV systems outperformed the baseline, with the hybrid-cooled system delivering the highest average power output—138.76 mW, a 32.37% improvement over the baseline. Surface temperatures were also significantly reduced, with the hybrid system lowering temperatures by up to 6.8°C. These results highlight the synergistic potential of combining optical and passive thermal enhancements in compact CPV designs, providing a scalable, cost-effective solar energy solution suitable for rural and off-grid applications in high-irradiance regions.
Holistic Approach for Creating Environmentally Friendly Campus Andoko, Andrey; Prastomo, Niki
Journal of Sustainability Perspectives Vol 1, No 2: December 2021
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1326.052 KB) | DOI: 10.14710/jsp.2021.11753

Abstract

To achieve an environmentally friendly campus, UMN operates gas engine generator with co-generation system. Waste heat from generator powers absorption chiller for air conditioning. UMN benefits clean energy sources, reduced pollution, and energy saving. The next phases rely on energy consumption reduction by applying passive design. Two towers were designed with double-skin facade. The perforated aluminum panel reduces solar heat gain on the building wall while still allows sunlight into the room for natural lighting. Lower room temperature will reduce cooling load, which will save energy. Combined with energyefficient appliances and natural air ventilation for corridors and open space, this concept saves more than half of energy consumption. Both towers were awarded the first and second winners of ASEAN Energy Award in 2014 and 2019. Various trees have been planted and produce oxygen to supply fresh air to create comfortable studying environment without air conditioning. To reduce carbon footprint, UMN provides shuttle bus and bike-sharing service. A holistic approach is implemented by recycling and conserving water with sewage water treatment and infiltration wells surrounding the campus. As part of the sustainability program, UMN has also utilized solar energy.
Holistic Approach for Creating Environmentally Friendly Campus Andoko, Andrey; Prastomo, Niki
Journal of Sustainability Perspectives Vol 1, No 2: December 2021
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1326.052 KB) | DOI: 10.14710/jsp.2021.11753

Abstract

To achieve an environmentally friendly campus, UMN operates gas engine generator with co-generation system. Waste heat from generator powers absorption chiller for air conditioning. UMN benefits clean energy sources, reduced pollution, and energy saving. The next phases rely on energy consumption reduction by applying passive design. Two towers were designed with double-skin facade. The perforated aluminum panel reduces solar heat gain on the building wall while still allows sunlight into the room for natural lighting. Lower room temperature will reduce cooling load, which will save energy. Combined with energyefficient appliances and natural air ventilation for corridors and open space, this concept saves more than half of energy consumption. Both towers were awarded the first and second winners of ASEAN Energy Award in 2014 and 2019. Various trees have been planted and produce oxygen to supply fresh air to create comfortable studying environment without air conditioning. To reduce carbon footprint, UMN provides shuttle bus and bike-sharing service. A holistic approach is implemented by recycling and conserving water with sewage water treatment and infiltration wells surrounding the campus. As part of the sustainability program, UMN has also utilized solar energy.
Co-Authors Andoko, Andrey Paramasatya, Johanes Dimas Robert, Nicholas