Enhancing the photovoltaic system efficiency using porous metallic media integrated with phase change material

被引:35
作者
Essa, Mohamed A. [1 ,3 ]
Talaat, M. [2 ,4 ]
Amer, Abdalla [2 ]
Farahat, M. A. [2 ]
机构
[1] Zagazig Univ, Fac Engn, Dept Mech Power Engn, Zagazig 44519, Egypt
[2] Zagazig Univ, Fac Engn, Elect Power & Machines, PO 44519, Zagazig, Egypt
[3] Shaqra Univ, Coll Engn, Mech Dept, Riyadh 11911, Saudi Arabia
[4] Shaqra Univ, Coll Engn, Elect Engn Dept, Riyadh 11911, Saudi Arabia
关键词
Photovoltaic thermal; Electrical efficiency; Thermal efficiency; PCM; Porous metallic media; Solar energy; PERFORMANCE EVALUATION; THERMAL SYSTEM; PV/T SYSTEM; PCM; SOLAR; NANOFLUID; ENERGY; COLLECTOR; EXERGY; PANELS;
D O I
10.1016/j.energy.2021.120299
中图分类号
O414.1 [热力学];
学科分类号
摘要
Photovoltaic (PV) thermal systems are a good efficiency enhancement solution as they enhance the electrical efficiency of PV panels and produce thermal energy. A recent technique that causes homogeneity in the PV cell temperature and provides energy storage is the use of phase change materials. However, some types of inexpensive phase change materials available in the market, such as paraffin, have low thermal conductivity in the solid phase. This paper introduces a solution for this problem using porous metallic media (PMM) integrated with the PCM system with active cooling. This investigation was experimentally conducted using three flow rates (0.2, 0.3, and 0.4 LPM) of water as a heat transfer fluid. The comparative analysis showed that for all flow rates, the PMM-PCM system achieved a higher efficiency than that with only the PCMs. The maximum electrical efficiency reached was 23% with the flow rate of 0.4 LPM, providing the best cooling for the PV panels within the system. Regarding the thermal efficiency, the flow rate of 0.3 LPM was found to achieve a maximum thermal efficiency of 74% in the PMM-PCM system. Moreover, an optimum overall efficiency of 95% in the system was achieved at 0.3 LPM. ? 2021 Elsevier Ltd. All rights reserved.
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页数:13
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