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Thermal performance analysis of a double-channel phase change slurry Trombe wall with seasonal switching, solar energy storage and utilization

Author

Listed:
  • Chen, Xing-ni
  • Gan, Wen-tao
  • Shen, Zi-qing
  • Xu, Bin
  • Pei, Gang

Abstract

A novel double-channel Direct absorption solar collector based on Phase change slurry - Trombe Wall (DPTW) was proposed with heating and shading modes for winter and summer. Combined with Phase change material - TW (PCMTW) and traditional TW, the effect of double-channel DPTW on thermal environment and energy consumption was evaluated. Results showed that in winter, the monthly average indoor temperature of DPTW, PCMTW and TW was 18.7, 18.2 and 18.3 °C. DPTW increased the duration of indoor temperature within 18.5–25.5 °C to 21.4 %, nearly twice that of the other two systems. In summer, DPTW decreased the duration of indoor temperature above 26.0 °C to 5.1 %, while the duration of other systems exceeded 10.0 %. Compared to PCMTW and TW, DPTW reduced heating energy consumption by 8.2 % and 3.2 %, as well as reduced cooling energy consumption by 10.6 % and 15.8 %. Three key parameters of phase change slurry (PCS) were optimized, including phase change temperature, volume fraction, and thermal conductivity. Based on optimized PCS, heating and cooling energy consumption of DPTW was further decreased by 18.5 % and 9.4 %. Double-channel DPTW system demonstrated exceptional climate adaptability, with the maximum energy saving rate at 67.1 % and 30.5 % in winter and summer of six cities.

Suggested Citation

  • Chen, Xing-ni & Gan, Wen-tao & Shen, Zi-qing & Xu, Bin & Pei, Gang, 2025. "Thermal performance analysis of a double-channel phase change slurry Trombe wall with seasonal switching, solar energy storage and utilization," Renewable Energy, Elsevier, vol. 248(C).
    • Handle: RePEc:eee:renene:v:248:y:2025:i:c:s0960148125008808
    DOI: 10.1016/j.renene.2025.123218
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