不同朝向玻璃窗太阳辐射得热系数模拟与实验研究

建立了太阳辐射得热系数的计算模型,并搭建了测量窗户太阳辐射得热系数的实验台,得到了玻璃窗的太阳辐射得热系数的实验值和模拟值,两者吻合度很好.结果表明:太阳辐射得热系数与太阳入射角密切相关,不同朝向玻璃窗的太阳辐射得热系数随着太阳入射角有规律地变化.当玻璃窗朝南时,一天之内太阳辐射得热系数先增大,中午时达到最大值而后减少;当玻璃窗朝西时,太阳辐射得热系数上午基本保持不变,而后减少(大概中午时分达到最小值),然后逐渐增大;玻璃窗朝东时太阳辐射得热系数变化情况与西向相反;当玻璃窗表面没有太阳直射辐射时,太阳辐射得热系数基本保持不变.

SIMULATION AND EXPERIMENT STUDY ON SOLAR HEAT GAIN COEFFICIENT OF GLASS WINDOWS IN DIFFERENT DIRECTION

The computational model of SHGC (solar heat gain coefficient) was built, and the test facility used to measure SHGC was set up. The experimental and simulation values of SHGC had good agreement. The results showed that SHGC of glass windows is closely related to the solar incident angle, it changed regularly with the solar incident angle. If the glass windows faced south, SHGC increased in the morning and decreased in the afternoon, it was up to the maximum in the midday. If the glass windows faced west, SHGC kept the same in the morning and then decreased, it is the minimum in the midday, while in the afternoon, SHGC increased gradually. If the glass windows faced east, the change trend of SHGC is opposite with that of west. And SHGC almost kept the same when there is no direct solar radiation.