Experimental study of rectangular micro heat pipe PV/T series and parallel systems

Rui Li, Zijiao Jia, Xiaohua Sun, Jinping Li and Vojislav Novakovic

Renewable Energy, 2025, vol. 247, issue C

Abstract: Photovoltaic/thermal (PV/T) systems, due to the abundant solar resources and cold climate in China's northwest regions, have attracted significant attention and show great application potential. Current researches on improving the performance of PV/T systems mostly focused on modifying the structure of the PV/T panels and changing the inclination angle of the PV/T panels, with relatively little attention paid to the connection methods of the PV/T panels. Therefore, building on the team's previous rectangular micro heat pipe PV/T (R-M-HP-PV/T) foundation, both parallel and series connection methods were employed in the experiments to enhance system performance. In the experiment on January 9th, the R-M-HP-PV/T series system achieved an average thermal conversion efficiency (TCE) of 30.3 %, an average photovoltaic conversion efficiency (PCE) of 13.1 %. In the subsequent experiment on January 10th, the R-M-HP-PV/T parallel system exhibited an average TCE of 35.0 %, an average PCE of 11.9 %. In addition, numerical simulation was accurately validated. The solar cell temperature in the numerical simulation was lower in the parallel connection setup. The total efficiency of the parallel connection reached 51.5 %, surpassing the series connection by 5.8 %. The results indicate that the parallel connection exhibits superior overall performance compared to the series configuration.

Keywords: Solar radiation; Rectangular micro heat pipe PV/T system; Series connection; Parallel connection (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:247:y:2025:i:c:s0960148125006780

DOI: 10.1016/j.renene.2025.123016

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