Synergistic performance study of ventilated photovoltaic based on composite phase change wall in summer

Xiangfei Kong, Zhengxia Zhao, Guanyuan Feng, Man Fan, Han Li, Yin Zhang, Ramy Rabie and Tamer M. Mansour

Renewable Energy, 2025, vol. 240, issue C

Abstract: To reduce the negative impact of summer high outdoor temperatures and photovoltaic (PV) heat production on the thermal and electrical performance of the wall, this study proposed a ventilated PV wall based on composite phase change materials (ventilated PV-CPCM wall) and conducted comparative outdoor experiments with a double hollow block (DHB) wall. The experiments indicated that the ventilated PV-CPCM wall reduced the heat transferred into the indoor space, and the internal surface temperature of the wall decreased by 0.5∼1.9 °C. Furthermore, the ventilated PV-CPCM wall exhibited a 5.4 % improvement in heat removal efficiency, a 13.7 % decrement in decay factor and 0.3 h longer delay time. On the other hand, the rise of PV module temperature resulted in a decline of electrical efficiency, and the introduction of airflow layer effectively mitigated the adverse influence of high temperature. As the outdoor temperature rose by 5.0 °C, the electrical efficiency decreased by 3.7 %. While as the ventilation speed increased by 1.0 m s−1, the electrical efficiency increased by 4.9 %. Compared to DHB wall, the thermal and electrical synergy efficiency of PV-CPCM wall was improved by 11.6 %∼18.2 % in varying outdoor conditions, facilitating the PV-CPCM wall more widely applicable in summer.

Keywords: Comparative outdoor experiment; Phase change energy storage; Thermal and electrical performance; Ventilated photovoltaic wall (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:240:y:2025:i:c:s0960148124022675

DOI: 10.1016/j.renene.2024.122199

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