Iterative Optimization of PV/T Microchannel Structure Based on Non-Uniform Parallel Arrangement

Bing Hong, Zhigang Zhou, Xuewei Song, Jie Yao, Xinye Wang (), Wenqiang Geng and Xiaolian Su
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Bing Hong: Guoneng Zhejiang Ninghai Power Generation Co., Ltd., Ningbo 315600, China
Zhigang Zhou: Guoneng Zhejiang Ninghai Power Generation Co., Ltd., Ningbo 315600, China
Xuewei Song: Guoneng Zhejiang Ninghai Power Generation Co., Ltd., Ningbo 315600, China
Jie Yao: Guodian Environmental Protection Research Institute Co., Ltd., Nanjing 210031, China
Xinye Wang: School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210023, China
Wenqiang Geng: Qingdao Sarnath Intelligent Technology Co., Ltd., Qingdao 266100, China
Xiaolian Su: School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210023, China

Energies, 2025, vol. 18, issue 4, 1-16

Abstract: The traditional uniform parallel microchannel structure in PV/T system results in the formation of high-temperature zones in a silicon cell. This paper proposes using the iterative optimization to change the uniform arrangement of microchannel width to a non-uniform arrangement, making the temperature distribution more uniform. A vertical Z-shape structure is selected as the optimization object for its relatively good performance. Its middle path resistance is high, resulting in a high-temperature zone in the middle-upper part of a silicon cell. Three characteristic parameters are compared to select the optimal monitored variable for the iterative calculations. Specific flow rate is found to be the best characteristic parameter, followed by flow rate, while flow velocity cannot be used for iteration. The optimization significantly improves the uniformity of temperature distribution in the silicon cell. The air layer further enhances the performance of the PV/T system, with a thickness of 7 mm being optimal. At the ambient temperature from −15 °C to 40 °C, the outlet water temperature ranges from 37.7 °C to 53.7 °C, and the overall efficiency ranges from 40.8% to 73.0%, showing good application potential.

Keywords: PV/T; microchannel; non-uniform; structural optimization; iteration (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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