湿帘风机安装高度对Venlo温室降温效果分析  

Analysis of cooling effect on the Venlo greenhouse depending on the installation height of wet curtain and fan

作　　者：高振军 李斯亮 司长青 丁小明 Nyam-Osor Batkhuu 李浩[4] Gao Zhenjun;Li Siliang;Si Changqing;Ding Xiaoming;Nyam-Osor Batkhuu;Li Hao(College of Mechanical and Power Engineering,China Three Gorges University,Yichang 443002,China;Key Laboratory of Agricultural Facility Structure Design and Intelligent Construction,Ministry of Agriculture and Rural Affairs,Beijing 100125,China;Department of Forest Environmental Science,National University of Mongolia,Ulaanbaatar 14201,Mongolia;Institute of Farmland Irrigation of CASS,Xinxiang 453000,China)

机构地区：[1]三峡大学机械与动力学院,宜昌443002 [2]农业农村部农业设施结构设计与智能建造重点实验室,北京100125 [3]Department of Forest Environmental Science,National University of Mongolia,Ulaanbaatar 14201,Mongolia [4]中国农业科学院农田灌溉研究所,新乡453000

出　　处：《农业工程学报》2022年第S01期257-264,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：“十三五”国家重点研发计划(2017YFD0701500);农业农村部农业设施结构工程重点实验室开放课题(201903)。

摘　　要：针对大型玻璃连栋温室(Venlo温室)在夏季湿帘-风机联合机械降温过程中出现的温度垂直梯度大、降温不充分、冷量浪费的问题,该研究设计并优化了不同湿帘和风机的安装高度(即设备距离地面的最低高度),分析其对温室降温效果的影响。采用试验和仿真相结合方法,通过与试验温室对比验证仿真模型准确性,并以仿真的方式设计不同的安装高度方案。结果表明,在3.2 m安装高度内,当湿帘安装高度为0.8 m,风机安装高度为3.2 m时降温效果最明显,温室平均温度降低了2.1℃;湿帘安装高度为3.2 m,风机安装高度为3.2 m时温度垂直梯度最小,温室平均温度的垂直梯度降低了5.8℃。湿帘和风机安装高度的变化对Venlo温室的综合降温效果影响较大,适当的降低湿帘安装高度和提高风机安装高度,可以加强温室流场换热过程,进一步强化温室湿冷空气流场的流动均匀性。该研究为温室湿帘和风机降温系统设计提供了进一步优化的理论依据。As an indispensable design parameter in the large glass greenhouse complex(Venlo greenhouse),the installation height(minimum distance from the ground)of the wet curtain and fan in the mechanical cooling system plays a significant role in greenhouse performance.In order to address the issues of large vertical temperature difference,insufficient cooling,and insufficient cooling consumption that occur in the process of mechanical cooling of the wet curtain and fan of Venlo greenhouse in summer,the influence of different installation heights of the wet curtain and fan on the cooling effect of the greenhouse was analyzed using the method of combining experiment with numerical calculation in this paper.The experimental greenhouse was analyzed through a two-factor,four-level simulation design and range analysis of the different installation heights of the wet curtain and fan.The experimental method involved measuring data from the experimental greenhouse.The greenhouse is a butterfly-shaped glass greenhouse located in Kemulang,Tianhe District,Guangzhou,which was newly built in 2019 in the Demonstration Base of Guangdong Agricultural Technology Extension Center,and equipped with a mechanical cooling system,including wet curtains,fans,and environmental data collectors.The experimental data was collected in August 2021,and the numerical calculation method was based on CFD.16 different combinations of the installation heights of the wet curtain and fan were simulated for the greenhouse.The installation heights were 0.8,1.6,2.4,and 3.2 m.Data was processed by using the range analysis method,with the average temperature of each installation height serving as the evaluation standard for the cooling effect.The simulation method was verified,with an average temperature error of 1.5 for the simulation model.The simulation model was also verified for cell℃ independence,with an average error of 1.8℃when the number of cells increased and an average error of 0.9℃ when the number of cells decreased.The results showed that within

关 键 词：温室 温度 湿帘 风机 安装高度 降温 

分 类 号：S625.1[农业科学—园艺学]