基于CFD模型的双膜大跨度拱棚热环境模拟  

Thermal environment simulation in a double‐film large‐span greenhouse based on CFD model

作　　者：王伟 方慧[1,2] 伍纲 程瑞锋 张义[1,4] 袁余 WANG Wei;FANG Hui;WU Gang;CHENG Ruifeng;ZHANG Yi;YUAN Yu(Institute of Environment and Sustainable Development in Agriculture,Chinese Academy of Agricultural Sciences,Beijing 100081,China;Key Laboratory of Energy Conservation and Waste Management of Agricultural Structures of Ministry of Agriculture and Rural Affairs,Beijing 100081,China;Institute of Facility Agriculture,Guangdong Academy of Agricultural Sciences,Guangzhou 510640,China;Western Agriculture Research Center,Chinese Academy of Agricultural Sciences,Changji 831100,China)

机构地区：[1]中国农业科学院农业环境与可持续发展研究所,北京100081 [2]农业农村部设施农业节能与废弃物处理重点实验室,北京100081 [3]广东省农业科学院设施农业研究所,广州510640 [4]中国农业科学院西部农业研究中心,新疆昌吉831100

出　　处：《中国农业大学学报》2024年第5期115-124,共10页Journal of China Agricultural University

基　　金：北京市科技计划(Z211100004621002);内蒙古自治区科技计划(2022YFDZ0086);中央级公益性科研院所基本科研业务费(Y2023PT22);中国农业科学院科技创新工程(CAAS-IEDA-TO7);宁夏回族自治区重点研发计划(2023BCF01047)“;天池英才”引进计划。

摘　　要：为探明多层覆盖对大跨度拱棚典型季节热性能的影响,采用计算流体力学(CFD)方法构建双膜大跨度拱棚模型,探究夏季无风和冬季有风2种较为极端环境下拱棚内热环境的分布规律,并与单膜大跨度拱棚进行对比。结果表明:拱棚内温度模拟值与实测值的平均相对误差为1.53%,均方根误差0.75℃,构建的CFD模型可准确模拟双膜大跨度拱棚内的温度分布;夏季工况下双膜大跨度拱棚在缓冲区域会产生高温积聚,导致双膜大跨度拱棚平均温度比单膜大跨度拱棚高约1℃;冬季工况下双膜大跨度拱棚内外层空间温差较大,双膜大跨度拱棚平均温度比单膜大跨度拱棚高5.1~10.6℃。综上,双膜大跨度拱棚更适用于寿光地区的气候环境。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°C 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°C to 10.6°C 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.

关 键 词：双膜大跨度拱棚 CFD模型 热环境模拟 冬季保温性能 

分 类 号：S625[农业科学—园艺学]