建筑外表面吸热对“城市热岛”增益的研究

Study on intensification of solar radiation absorption of building exterior surface on“urban heat island effect”

城市建筑外表面吸热对“城市热岛”具有明显的增益效果,对面积放大系数R进行了定义,并对其进行了分析研究,给出了若干典型建筑物的R值；对不同太阳高度角和太阳方位角下建筑外表面太阳辐射吸收情况及其增热效应进行了探讨,提出了加入建筑物外表面面积的新型城市绿地率计算公式。

The exterior surface of urban buildings obviously intensifies ＂urban heat island effect＂ because of its solar radiation absorption. The area magnification coefficient （R）is defined and analyzed, and some R values for different heights of buildings are given. The solar radiation absorption quantity for the building exterior surface under different sun elevation angle and sun azimuth and its heat effects are discussed. A new formula for the calculation of urban green land rate is given, which involved the exterior surface of buildings.