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CFD Analysis of Solar Greenhouse Thermal and Humidity Environment Considering Soil–Crop–Back Wall Interactions

Author

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  • Changqing Si

    (College of Mechanical and Power Engineering, China Three Gorges University, Yichang 443002, China
    Key Laboratory of Farm Building in Structure and Intelligent Construction, Ministry of Agriculture Rural Affairs, Beijing 100125, China)

  • Fei Qi

    (Key Laboratory of Farm Building in Structure and Intelligent Construction, Ministry of Agriculture Rural Affairs, Beijing 100125, China
    Academy of Agricultural Planning and Engineering, Ministry of Agriculture Rural Affairs, Beijing 100125, China)

  • Xiaoming Ding

    (Key Laboratory of Farm Building in Structure and Intelligent Construction, Ministry of Agriculture Rural Affairs, Beijing 100125, China
    Academy of Agricultural Planning and Engineering, Ministry of Agriculture Rural Affairs, Beijing 100125, China)

  • Fen He

    (Key Laboratory of Farm Building in Structure and Intelligent Construction, Ministry of Agriculture Rural Affairs, Beijing 100125, China
    Academy of Agricultural Planning and Engineering, Ministry of Agriculture Rural Affairs, Beijing 100125, China)

  • Zhenjun Gao

    (College of Mechanical and Power Engineering, China Three Gorges University, Yichang 443002, China)

  • Qian Feng

    (Key Laboratory of Farm Building in Structure and Intelligent Construction, Ministry of Agriculture Rural Affairs, Beijing 100125, China
    Academy of Agricultural Planning and Engineering, Ministry of Agriculture Rural Affairs, Beijing 100125, China)

  • Liang Zheng

    (College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China)

Abstract

In the study of solar greenhouses, microclimate, soil, and back walls have an important influence on the greenhouse thermal environment because of their good heat storage and release characteristics. The transpiration of crops makes indoor humidity increase sharply, which is the main factor affecting indoor humidity distribution. Therefore, it is of great significance to grasp the microclimate change law of solar greenhouses and study the coupling effect of thermal and humidity environment. In this paper, based on computational fluid dynamics (CFD), a three-dimensional model of the thermal and humidity environment of a solar greenhouse is established, and the indoor temperature and humidity distribution under the influence of soil, crops, and back walls are considered. The CFD model initialization uses binary fitting functions to fit the temperature distribution of soil, back wall, and air. The distribution law of the temperature field and relative humidity field of the solar greenhouse under three different working conditions is simulated, that is, the insulation is uncovered and the ventilation window is closed during the day (G1), the insulation is uncovered and the ventilation window is opened during the day (G2), and the insulation is put down and the ventilation window is closed at night. (G3). The results show that the simulation results are in good agreement with the actual results under the three working conditions, and this paper can provide a reference for the improvement of the greenhouse structure and environmental regulation.

Suggested Citation

  • Changqing Si & Fei Qi & Xiaoming Ding & Fen He & Zhenjun Gao & Qian Feng & Liang Zheng, 2023. "CFD Analysis of Solar Greenhouse Thermal and Humidity Environment Considering Soil–Crop–Back Wall Interactions," Energies, MDPI, vol. 16(5), pages 1-20, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:5:p:2305-:d:1082574
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    References listed on IDEAS

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    1. Abbas, Zulkarnain & Yong, Li & Abbas, Saqlain & Chen, Dongwen & Li, Y. & Wang, R.Z., 2021. "Performance analysis of seasonal soil heat storage system based on numerical simulation and experimental investigation," Renewable Energy, Elsevier, vol. 178(C), pages 66-78.
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    Cited by:

    1. Abdul Waheed & Chuang Li & Murad Muhammad & Mushtaq Ahmad & Khalid Ali Khan & Hamed A. Ghramh & Zhongwei Wang & Daoyuan Zhang, 2023. "Sustainable Potato Growth under Straw Mulching Practices," Sustainability, MDPI, vol. 15(13), pages 1-16, July.
    2. Qihang Zhang & Qinli Deng & Xiaofang Shan & Xin Kang & Zhigang Ren, 2023. "Optimization of the Thermal Environment of Large-Scale Open Space with Subzone-Based Temperature Setting Using BEM and CFD Coupling Simulation," Energies, MDPI, vol. 16(7), pages 1-18, April.

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