A systematic analysis of multiple structural parameters of Chinese solar greenhouse based on the thermal performance. (15th June 2023)

• Record Type: Journal Article
• Authors: Wu, Xiaoyang; Li, Yiming; Jiang, Lingling; Wang, Yang; Liu, Xingan; Li, Tianlai
• Is Part Of: Energy. Volume 273(2023)
• Publication Date: 2023-06-15
• Subjects: Chinese solar greenhouse -- Thermal environment -- Multiple structural parameters -- CFD; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2023.127193
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: The existing Chinese solar greenhouse (CSG) had different spatial structure types, which spatial structure can make the greenhouse fully utilize solar energy and obtain the best thermal performance effect is worthy of further research. This paper took the CSG in the Shenyang area as the research object. A mathematical model was established to simulate the three-dimensional dynamic thermal environment of CSG at the crop level by combining experimental and computational fluid dynamics (CFD) numerical simulation. The model can well describe the heat transfer process in the greenhouse. Based on this model, the effects of variation of multiple structural parameters on the temperature distribution, solar energy interception, heat storage and release performance of CSG were quantitatively specified. The simulation results demonstrated that for the CSG with a span of 10 m in the Shenyang area, the optimal ridge height was 6.2 m, the optimal north wall height was 4.4 m and the optimal horizontal projection length of the north roof was 2.0 m. Furthermore, the spatial structure parameters of CSG with an 8 m–12 m span were obtained for the Shenyang area. This paper can provide theoretical guidance for the design and optimization of spatial structure parameters of CSG in the Shenyang area. Highlights: A CFD model was established to simulate the thermal environment of crop level in CSG. The CFD model can accurately depict the dynamic heat and mass exchange process in CSG. The effect of structural parameters on the thermal environment of CSG was expounded. The structural parameters of CSG with 8 m–12 m span were obtained for the Shenyang area.