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

Author

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

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.

Suggested Citation

  • Kong, Xiangfei & Zhao, Zhengxia & Feng, Guanyuan & Fan, Man & Li, Han & Zhang, Yin & Rabie, Ramy & Mansour, Tamer M., 2025. "Synergistic performance study of ventilated photovoltaic based on composite phase change wall in summer," Renewable Energy, Elsevier, vol. 240(C).
    • Handle: RePEc:eee:renene:v:240:y:2025:i:c:s0960148124022675
    DOI: 10.1016/j.renene.2024.122199
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