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Influence mechanism on thermoelectric and refrigerating performance of PVT composite cycle system with collaborative compressor-refrigerant pump drive

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  • Guo, Xiaochao
  • Wu, Yiping
  • Wang, Boyuan
  • Wei, Qingpeng

Abstract

The lack of clarity regarding the quantitative influence mechanisms poses a significant challenge to the optimized design and reliable application of the novel PVT composite cycle system with collaborative compressor-refrigerant pump drive in different regions. Therefore, a simulation platform was established to investigate the mechanism that influences the thermoelectric and refrigerating performance of the novel system. The research indicates that for every 1.0 °C increase in ambient temperature, the heating COP rises by 1.5 %, 5.0 %, and 5.0 % for the PVT heat pump, PVT composite cycle, and PVT power heat pipe cogeneration modes, respectively, while the exergy efficiency decreases by 0.5 % across all modes; with every 10 W/m2 increase in solar irradiance, the heating COP increases by 1.5 %, 3.0 %, and 2.0 % for the previously mentioned three cogeneration modes, respectively, and the exergy efficiency sees a 0.1 % increase across all modes. Moreover, with each 1.0 °C rise in ambient temperature, the refrigerating capacity and refrigerating COP decrease by 1.5 % and 2.5 %, respectively; for each 1 m/s escalation in wind speed, the refrigerating capacity and refrigerating COP are enhanced by 3.0 % and 5.0 %, respectively. The heating COP and exergy efficiency of the proposed system are, respectively, 10.0 %–575 % and 5.0 %–25.0 % superior to those of the existing PVT heat pump system. Furthermore, the additional investment relative to the existing PVT heat pump system is projected to be recouped within a span of 0.6–2.0 years. These findings provide a crucial theoretical framework and definitive performance benchmarks for the optimized design and application of this novel system across diverse climatic regions.

Suggested Citation

  • Guo, Xiaochao & Wu, Yiping & Wang, Boyuan & Wei, Qingpeng, 2026. "Influence mechanism on thermoelectric and refrigerating performance of PVT composite cycle system with collaborative compressor-refrigerant pump drive," Renewable Energy, Elsevier, vol. 262(C).
    • Handle: RePEc:eee:renene:v:262:y:2026:i:c:s0960148126001758
    DOI: 10.1016/j.renene.2026.125350
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    References listed on IDEAS

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