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Experimental and numerical investigation of a backside convective cooling mechanism on photovoltaic panels

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  • Nižetić, S.
  • Grubišić- Čabo, F.
  • Marinić-Kragić, I.
  • Papadopoulos, A.M.

Abstract

In this paper, two generic photovoltaic (PV) panels (poly-Si and mono-Si) were experimentally tested in typical Mediterranean climatic conditions. The focus of the applied experimental approach was to examine the effect of backside convective thermal profile and its impact on temperature distribution, i.e. on panel electrical efficiency. Therefore, a series of measurements was made in 2015, from April to July, as well as CFD modeling in order to obtain a detailed analysis of the possible working regimes. According to the obtained experimental and CFD results, the present design of typical PV panels have an unfavorable impact on PV panel electrical efficiency. Namely, typical contemporary panel designs lead to two typical backside convective air temperature profiles which have a direct impact on the effectiveness of natural cooling. As shown in the obtained measurements, the specific convective profiles at the backside of PV panels have a significant influence on the degradation rate of panel electrical efficiency in the estimated amount of 2.5% up to 4.5%. The results of the research discussed in this paper signal the need to provide a possible redesign of the backside surface in conventional PV panels, in order to increase their average efficiency (more efficient backside thermal dissipation).

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  • Nižetić, S. & Grubišić- Čabo, F. & Marinić-Kragić, I. & Papadopoulos, A.M., 2016. "Experimental and numerical investigation of a backside convective cooling mechanism on photovoltaic panels," Energy, Elsevier, vol. 111(C), pages 211-225.
    • Handle: RePEc:eee:energy:v:111:y:2016:i:c:p:211-225
    DOI: 10.1016/j.energy.2016.05.103
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    6. Liu, Yanfeng & Chen, Yingya & Wang, Dengjia & Liu, Jingrui & Luo, Xi & Wang, Yingying & Liu, Huaican & Liu, Jiaping, 2021. "Experimental and numerical analyses of parameter optimization of photovoltaic cooling system," Energy, Elsevier, vol. 215(PA).
    7. Alberto Benato & Anna Stoppato, 2019. "An Experimental Investigation of a Novel Low-Cost Photovoltaic Panel Active Cooling System," Energies, MDPI, vol. 12(8), pages 1-24, April.
    8. Nahani, P. & Eslami, M. & Hamzehzarghani, R., 2024. "Effects of wind on cooling and performance of photovoltaic arrays: A case study CFD modeling," Energy, Elsevier, vol. 293(C).
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