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Solar-driven large-span arch shed for thermal and humid environment regulation: synergistic mechanism of adsorption dehumidification and soil heat storage

Author

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  • Hu, Xiaofeng
  • Wang, Wei
  • Wu, Gang
  • Feng, Chaoqing
  • Cheng, Ruifeng
  • Liu, Na

Abstract

Aiming at the adverse effects of low temperature and high humidity planting environment at night on crop growth in winter arched sheds, this study proposes an arched shed heating and dehumidification system (AS-HD) based on solar cascade utilization for dehumidification and heating in arched sheds. The system utilizes a composite multi-curved trough collector (CMTC) coupled with a multi-layer adsorption dehumidification box composite multi-curved trough collector (MADB), and combines it with U-shaped buried pipe soil heat storage to achieve a day night coordinated temperature and humidity control mechanism in the greenhouse. During the nighttime, MADB is used for adsorption dehumidification, supplemented by sensible heat exchange between the ground heat exchange system and the greenhouse environment to increase temperature. During the daytime, CMTC is used to store heat in the geothermal system and drive the desorption and regeneration of desiccants, achieving the collection and conversion of solar energy. Through CFD simulation and experimental verification, the effective heat collection duration and optical acceptance rate of CMTC on winter solstice were revealed, as well as the instantaneous dehumidification capacity of MADB reaching 4.1 g/kg under inlet wind speed of 4 m/s and relative humidity of 90 %. The results show that the system can reduce the relative humidity of the greenhouse at night by 7.1 % and increase the air temperature by 2.3 °C, which has significant energy-saving advantages compared to traditional heat pumps and ventilation dehumidification methods. The research results have achieved the coordinated optimization of temperature and humidity and efficient utilization of energy driven by solar energy.

Suggested Citation

  • Hu, Xiaofeng & Wang, Wei & Wu, Gang & Feng, Chaoqing & Cheng, Ruifeng & Liu, Na, 2026. "Solar-driven large-span arch shed for thermal and humid environment regulation: synergistic mechanism of adsorption dehumidification and soil heat storage," Renewable Energy, Elsevier, vol. 259(C).
    • Handle: RePEc:eee:renene:v:259:y:2026:i:c:s096014812502751x
    DOI: 10.1016/j.renene.2025.125087
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