湿热地区降雨对种植屋面热工性能的影响研究  

Influence of Precipitation on Thermal Behavior of Green Roof in Hot-humid Areas

作　　者：邓智超 张磊[1] 张玉[1] 孟庆林[1] DENG Zhichao;ZHANG Lei;ZHANG Yu;MENG Qinglin(South China University of Technology,Guangzhou 510641,China)

机构地区：[1]华南理工大学,广州510641

出　　处：《建筑科学》2020年第12期89-95,共7页Building Science

基　　金：国家重点研发计划“建筑全性能仿真平台内核开发”(2017YFC0702200)。

摘　　要：种植屋面热工性能受到植被层蒸腾作用和基质层热工参数的综合影响。在湿热地区,降雨是种植屋面的主要水分来源,会影响基质层含水率,进而影响到植被层的蒸腾速率和基质层的热工参数。本文将雨水截留模型集成到了种植屋面的传热计算中,将种植屋面各表面温度的计算值与实测值进行了比较,验证了种植屋面传热计算过程的准确性。然后分析了降雨后植被层蒸腾潜热量和基质层导热系数、比热容的变化规律。The thermal behavior of green roof is influenced by both transpiration of vegetation canopy and thermal parameters of substrate layer.In hot-humid areas,precipitation is the main source of moisture for green roof.By affecting the moisture content of substrate layer,precipitation can influence the transpiration rate of vegetation canopy and the thermal behavior of substrate layer.Therefore,the precipitation interception model is incorporated into the heat transfer calculation of green roof.The calculated values of temperature of each surface of green roof are compared with the measured values,so as to verify the accuracy of the heat transfer calculation process for green roof.At last,the paper discusses how the transpiration rate of vegetation canopy,thermal conductivity and specific heat capacity of substrate layer change after precipitation.

关 键 词：湿热地区 种植屋面 植被蒸腾 热工性能 

分 类 号：TU119[建筑科学—建筑理论]