不同玻璃对夏季炎热地区室内太阳辐射得热的影响分析

INFLUENCE OF DIFFERENT GLASS ON THE INDOOR SOLAR HEAT GAIN IN HOT SUMMER AREAS

以夏季炎热的重庆地区为例,采用理论计算方法,深入分析不同玻璃类型对室内太阳辐射得热量的影响。通过建立太阳辐射模型,计算分析不同玻璃在不同朝向下的室内太阳辐射得热量,结果表明:当采用相同玻璃时,东、西向外窗全天阻挡的太阳辐射量约为南北向外窗全天阻挡量的2倍,东、西向外窗相比南北向外窗具有更大的隔热节能潜力;同时,透过Low-E中空玻璃和普通中空玻璃的室内平均太阳辐射得热量分别是透过单层玻璃的0.37倍和0.85倍,与实验测试分析结果基本一致;在进行不同玻璃外窗室内太阳辐射得热量计算时,不仅要考虑玻璃本身的隔热性能差异,还必须结合当地不同朝向外窗接收太阳辐射的时间分布规律。

Theoretical calculation methodology was used to analyze the effect on indoor solar heat gain of different glass in Chongqing area. The indoor solar heat gain of different glass in four orientations was calculated based on the solar radiation model. The result showed that, first, east and west windows have more energy saving potential than south and north ones, for that the former can stop about twice as solar radiation heat as the latter with same glass; second, the indoor solar heat gain through Low-E and insulting glass are respectively 0. 37 and 0. 85 times as single glass; third, thermal and optical property of different glass must be taken into account as well as the distribution law of time external window receive solar radiation in different orientations when the indoor solar heat gain with different glass is calculated.