EFFECT OF UNDERGROUND PIPE HEATING ON SOIL TEMPERATURE IN DOUBLE-FILM SOLAR GREENHOUSE

Guo Mengjie; Ta Na; Yan Caixia; Zhen Qi; Zhao Shengji; Li Xiaokai

doi:10.19912/j.0254-0096.tynxb.2024-1564

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (1) : 167-176. DOI: 10.19912/j.0254-0096.tynxb.2024-1564

EFFECT OF UNDERGROUND PIPE HEATING ON SOIL TEMPERATURE IN DOUBLE-FILM SOLAR GREENHOUSE

Guo Mengjie¹, Ta Na^1,2, Yan Caixia^1,2, Zhen Qi^1,2, Zhao Shengji¹, Li Xiaokai¹

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Abstract

To evaluate the heating effect of buried pipes in solar greenhouses during winter under different parameter settings, this study employed computational fluid dynamics (CFD) to simulate soil temperature distributions under varying inlet temperatures （50,45,40,35,and 30 ℃）, pipe diameters （16, 20, 25, 32, 40 mm）, and flow velocities （0.2, 0.4, 0.6, 0.8, 1.0 m/s）. The results indicate that with an inlet temperature of 40 ℃ and a pipe diameter of 32 mm, the soil temperature around celery roots can be maintained within the suitable growth range. In contrast, variations in inlet flow velocity showed no significant effect on the temperature at the same soil location.

Key words

underground heat transfer / soil temperature / computational fluid dynamics / solar greenhouse / parameter optimization

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Guo Mengjie, Ta Na, Yan Caixia, Zhen Qi, Zhao Shengji, Li Xiaokai. EFFECT OF UNDERGROUND PIPE HEATING ON SOIL TEMPERATURE IN DOUBLE-FILM SOLAR GREENHOUSE[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 167-176 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1564

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