拓展型绿色屋顶的热工性能  

Thermal Performance of Extended Green Roof

作　　者：徐晓莹 付海明[1,2] XU Xiaoying;FU Haiming(College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]东华大学国家环境保护纺织污染防治工程技术中心,上海201620

出　　处：《东华大学学报（自然科学版）》2020年第3期428-434,共7页Journal of Donghua University(Natural Science)

基　　金：国家自然科学基金资助项目(41371445,51178094)。

摘　　要：为探究拓展型绿色屋顶的热工性能,在东华大学综合实验楼上进行绿色屋顶与普通屋顶的对比试验,采用稳态叶片平衡理论对试验植物的叶片温度进行计算。结果表明:绿色屋顶可以减小屋顶结构层的温度升高幅度,且1d内绿色屋顶的平均温度比普通屋顶低3~7℃;验证了绿色屋顶在特定时期出现的逆流特性,且试验期间绿色屋顶植物层的平均热阻为0.56 W/(m·K);稳态叶片平衡理论计算结果与测试结果基本吻合。To explore the thermal performance of the extended green roof,a comparison experiment between the green roof and the ordinary roof was carried out on the comprehensive experimental building at Donghua University.The leaf temperature of test plants was calculated based on the steady-state blade balance theory.The results show that the green roof can reduce the surface temperature variation range of roof structural layer.The average temperature of the green roof is 37℃,lower than that of the ordinary roof in one day.It is verified that the green roof has a reverse flow in a certain period,and the average thermal resistance of the green roof plant layer during the experiment is 0.56 W/(m·K).The calculation results obtained by the steady-state blade balance theory are basically consistent with the test results.

关 键 词：绿色屋顶 叶片温度 热流密度 热阻 理论计算 

分 类 号：X513[环境科学与工程—环境工程] S731.2[农业科学—林学]