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.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
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)
关键词
绿化屋顶
屋面温度
热效应
热阻值
城市微气候
green roof
surface temperatures
thermal performance
R-value
urban microclimate
