植物对绿化屋顶热工性能影响的模拟研究  

Simulation study on the effect of plant cultivation on thermal performance of green roof

作　　者：徐晓莹 付海明 XU Xiao-ying;FU Hai-ming(College of Environmental science and Engineering,Donghua University;State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry,Donghua University)

机构地区：[1]东华大学环境科学与工程学院国家环境保护纺织工业污染防治工程技术中心

出　　处：《建筑热能通风空调》2020年第6期47-49,46,共4页Building Energy & Environment

基　　金：国家自然科学基金资助项目(No.41371445,No.51178094)。

摘　　要：为了研究绿化屋顶中植物对其的影响,建立简化绿化屋顶模型,通过运用计算流体力学(CFD)进行模拟,分析植物冠层叶面积指数(LAI)和风速对绿化屋顶热工性能的影响。研究结果表明:植物冠层对绿化屋顶有很好的隔热降温作用。绿化屋顶整体温度随着植物冠层叶面积指数的增大而减小,随风速的增大而减小,但植物冠层叶面积指数存在最优值,使得隔热降温效果较好的同时,尽可能小的降低屋顶载荷。In order to study the influence of plant planting on greening roof,a simplified greening roof model was established.The thermal performance of greening roof was analyzed by using Computational Fluid Dynamics(CFD)to simulate the effects of plant canopy Leaf Area Index(LAI)and flow velocity.The results show that the plant canopy has a good thermal insulation effect on the green roof;the overall temperature of the green roof decreases with the increase of the plant canopy leaf area index and decreases with the increase of wind speed.However,the plant canopy leaf area index has an optimal value,so that the heat insulation cooling effect is better,and the roof load is reduced as small as possible.

关 键 词：绿化屋顶 叶面积指数 风速 温度 

分 类 号：TU111[建筑科学—建筑理论] TU985.12