中文摘要：

针对自然气候作用下的草地式屋顶绿化形式，提出采用屋顶绿化隔热效果实测与屋顶热传导计算分析相结合的方法确定绿化层等效热阻，并在重庆选择通风屋顶有绿化层和无绿化层的实例进行了连续5个月的夏季隔热效果现场实测，结果表明：气温越高、太阳辐射越强，屋顶绿化层的隔热效果越好。实测数据的理论分析得到屋顶绿化层的等效热阻为0．56m^2·K／W。

英文摘要：

In the integrated measures of building energy efficiency, soil efficiency and improve the eco-environment of city, green roof get extensive attention and vigorous advocate in recent years. Despite various green roof technology improving, how to determine the basic parameter for thermal performance design is remain unresolved. A method of combine field measurement during whole summer is proposed with thermal transfer calculation to determine thermal R-values of grass-green roof in the natural climate. Five months fieldtest at ventilation roof with green and without green was made in Chongqing in the summer. The results show that the higher the air temperature and the stronger the solar radiation, the better the heat insulation effect of green-roof. According to the analysis of field-test data the equivalent thermal resistance of green layer is 0.56 m^2 · K/W.