绿化屋顶热效应的观测试验  

Experimental study of the thermal performance of a green roof

作　　者：孙挺[1] 倪广恒[1] 唐莉华[1] 张书函[2] 孔刚[2] 

机构地区：[1]清华大学水利水电工程系,水沙科学与水利水电工程国家重点实验室,北京100084 [2]北京市水利科学研究所,北京100044

出　　处：《清华大学学报（自然科学版）》2012年第2期160-163,共4页Journal of Tsinghua University(Science and Technology)

基　　金：水利部公益性行业科研专项基金资助项目(200801108);水沙科学与水利水电工程国家重点实验室课题(2009-TC-1)

摘　　要：为了评价绿化屋顶对城市微环境的热效应影响,利用基于轻质高透水性基质材料的绿化屋顶和普通屋顶,开展了近10个月对比观测,对温度、热阻值(R值)等进行了定量分析。结果显示:观测期内绿化屋顶的屋面温度波动降低54%,在秋、冬和春季表现出保温效果,夏季则表现出降温效果,并将屋顶整体热阻值提高33%～200%。绿化屋顶对降低建筑能耗、改善人居环境具有积极作用。The thermal impact on the urban microenvironment of a lightweight aggregate-based green roof was studied by parallel experiments for 10 months to observe the temperatures and estimate the R-value of both green and conventional roofs.During the experimental period,the green roof significantly reduced temperature fluctuations by 54%,provided effective thermal insulation in the winter,protected the roof membrane from rapid heating in the summer,and increased the R-value of the ensemble roof system by 33%~200%.The results show that the green roof is capable of protecting the roof system from extreme temperatures and improving the urban microclimate.

关 键 词：绿化屋顶 屋面温度 热效应 热阻值 城市微气候 

分 类 号：TV111.3[水利工程—水文学及水资源] P332.2[天文地球—水文科学]