建筑外饰面表面污染后太阳辐射吸收系数的测试与修正

建筑外饰面材料在使用过程中,其表面的太阳辐射吸收系数将发生变化,故设计之初需要对其进行修正。通过参考相关国家标准对三种不同种类的建筑外饰表面材料进行耐玷污性试验,测试饰面材料被污染前后建筑外饰面表面半球辐射率和太阳辐射吸收系数的变化,并对建筑外饰面的太阳辐射吸收系数及污染修正系数进行曲线拟合,得到了较好的拟合结果,根据此拟合曲线可以得出污染后材料的太阳辐射吸收系数,供设计人员参考。

TESTING AND AMENDMENT OF SOLAR RADIATION ABSORPTION COEFFICIENT IN BUILDING EXTERNAL FINISHES

Solar radiation absorption coefficient of building external finishes would change in the process of using. It was necessary to amend the value. Dirt pick up resistance of three different kind of building external finishes were tested according to National Standard of People＇s Republic of China. Emittanee and solar radiation absorption coefficient were measured when the building external finishes were clean and contaminated. Good curve was got when solar radiation absorption coefficient and contamination correction factor were fitted. Solar radiation absorption coefficient could be calculated according to the fitting curve after the contamination of the building external finishes, which should be as reference by designers.