基于CFD模型的双膜大跨度拱棚热环境模拟OA北大核心CSTPCD

To investigate the influence of multi-layer coverage on the typical seasonal thermal performance of large-span greenhouse,a double-film large-span greenhouse model was constructed based on computational fluid dynamics(CFD)model.The distribution law of the internal heat environment in the greenhouse under two extreme environments of no wind in summer and wind in winter was investigated and were then compared and analyzed with the thermal environment distribution of a single-film greenhouse.The results show that:The constructed CFD model accurately represents the temperature distribution inside the double-film large-span greenhouse,with an average relative error of 1.53％and a root mean square error of 0.75.During summer conditions,the double-film large-span greenhouse shows higher temperature accumulation in the buffer area,leading to an average temperature of about 1 ℃ higher than that of the single-film greenhouse.Moreover,during winter conditions,the double-film large-span greenhouse achieves a larger winter difference inside and outside,with an average temperature 5.1 ℃ to 10.6 ℃ higher than that of the single-film greenhouse.To sum up,the double-film large-span greenhouse is more suitable for the climatic environment of the Shouguang area.