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Numerical simulation of the airflow and temperature distribution in a lean-to greenhouse

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  • Chen, Wei
  • Liu, Wei

Abstract

In this paper, heat transfer and flow in a lean-to passive solar greenhouse has been studied. A mathematical model based on energy equilibrium and a one-dimensional mathematical model for the unsaturated porous medium have been founded and developed to predict the temperature and moisture content in soil and the enclosed air temperature in the greenhouse. On the condition that plant and massive wall is neglected, the air is mainly heated by the soil surface in the greenhouse, which absorbs the incident solar radiation. With increase in depth, the variation of the temperature and moisture content in soil decreases on account of ambient, and the appearance of the peak temperature in soil postpone. Solar radiation absorber, heat storage and insulation are the main effects of the north massive wall on greenhouse, which is influenced by the structure and the material. The specific heat capacity and thermal conductivity of wall material have a remarkable effect on the north wall temperature. The build-up north wall with thermal insulation material may be chosen for greenhouse. The temperature distribution and gas flow in greenhouse is influenced by the cover material of the inside surface of the north wall and the inclined angle of greenhouse roof. All results should be taken into account for a better design and run of a greenhouse.

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  • Chen, Wei & Liu, Wei, 2006. "Numerical simulation of the airflow and temperature distribution in a lean-to greenhouse," Renewable Energy, Elsevier, vol. 31(4), pages 517-535.
    • Handle: RePEc:eee:renene:v:31:y:2006:i:4:p:517-535
    DOI: 10.1016/j.renene.2005.04.015
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    References listed on IDEAS

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    1. Chen, Wei & Liu, Wei, 2004. "Numerical analysis of heat transfer in a composite wall solar-collector system with a porous absorber," Applied Energy, Elsevier, vol. 78(2), pages 137-149, June.
    2. Kürklü, Ahmet & Bilgin, Sefai & Özkan, Burhan, 2003. "A study on the solar energy storing rock-bed to heat a polyethylene tunnel type greenhouse," Renewable Energy, Elsevier, vol. 28(5), pages 683-697.
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    Cited by:

    1. Guan, Yong & Wang, Tuo & Tang, Rui & Hu, Wanling & Guo, Jianxuan & Yang, Huijun & Zhang, Yun & Duan, Shijian, 2020. "Numerical study on the heat release capacity of the active-passive phase change wall affected by ventilation velocity," Renewable Energy, Elsevier, vol. 150(C), pages 1047-1056.
    2. Chen, Chao & Ling, Haoshu & Zhai, Zhiqiang (John) & Li, Yin & Yang, Fengguang & Han, Fengtao & Wei, Shen, 2018. "Thermal performance of an active-passive ventilation wall with phase change material in solar greenhouses," Applied Energy, Elsevier, vol. 216(C), pages 602-612.
    3. Xingan Liu & He Li & Yiming Li & Xiang Yue & Subo Tian & Tianlai Li, 2020. "Effect of internal surface structure of the north wall on Chinese solar greenhouse thermal microclimate based on computational fluid dynamics," PLOS ONE, Public Library of Science, vol. 15(4), pages 1-20, April.
    4. Saleh Mohammadi & Esmail Khalife & Mohammad Kaveh & Amir Hosein Afkari Sayyah & Ali Mohammad Nikbakht & Mariusz Szymanek & Jacek Dziwulski, 2021. "Comparison of Optimized and Conventional Models of Passive Solar Greenhouse—Case Study: The Indoor Air Temperature, Irradiation, and Energy Demand," Energies, MDPI, vol. 14(17), pages 1-15, August.

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    Keywords

    Greenhouse; Heat transfer; Soil; Wall;
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