The Solar Heat Gain Coefficient (SHGC) is one of the energy loss factors in buildings, which affects a cooling load significantly. A variety of shading devices and high-performance windows have already been developed and applied to a large number of buildings to reduce a cooling load. However, performance evaluation on these shading devices and high-performance windows has depended on calculation via mathematical models and simulations. These evaluation methods have limits when reflecting heat characteristics of the ever-increasing complexity and development of window systems accurately in a realistic way. Thus, it is critically necessary to verify performance evaluation results through actual measure. The purpose of this paper is to measure the SHGC of various types of windows and shading devices and to analyze the difference between the calculated value and the measured value. The experimental result is as follows. SHGC of venetian blind is lower than SHGC of roll screen and Triple shade. The higher the glass SHGC was, the higher the SHGC reduction rate was under the same condition. The larger the slot angle was, the greater the SHGC performance improved. The analysis result on measured and calculated values showed that a mean different ratio was 4.86 %, which was matched within 5 % of the deviation rate. However, the different ratio tended to increase as the complexity of structures and types of windows increased.

中文翻译：

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安装遮阳装置的窗户SHGC计算与测量研究

太阳能得热系数 (SHGC) 是建筑物中的能量损失因素之一，对冷负荷有显着影响。已经开发出多种遮阳装置和高性能窗户并应用于大量建筑物以减少冷负荷。然而，对这些遮阳设备和高性能窗户的性能评估依赖于通过数学模型和模拟的计算。这些评估方法在以现实的方式准确反映窗户系统日益复杂和发展的热特性时存在局限性。因此，通过实际测量来验证绩效评估结果是非常必要的。本文的目的是测量各种类型的窗户和遮阳装置的SHGC，并分析计算值与实测值的差异。实验结果如下。百叶窗的SHGC低于卷帘和三重帘的SHGC。玻璃SHGC越高，相同条件下SHGC还原率越高。槽角越大，SHGC 性能提高得越大。对实测值和计算值的分析结果表明，平均差异比为4.86%，在5%的偏差率范围内匹配。然而，随着结构复杂性和窗户类型的增加，不同的比率有增加的趋势。百叶窗的SHGC低于卷帘和三重帘的SHGC。玻璃SHGC越高，相同条件下SHGC还原率越高。槽角越大，SHGC 性能提高得越大。对实测值和计算值的分析结果表明，平均差异比为4.86%，在5%的偏差率范围内匹配。然而，随着结构复杂程度和窗户类型的增加，不同的比率有增加的趋势。百叶窗的SHGC低于卷帘和三重帘的SHGC。玻璃SHGC越高，相同条件下SHGC还原率越高。槽角越大，SHGC 性能提高得越大。对实测值和计算值的分析结果表明，平均差异比为4.86%，在5%的偏差率范围内匹配。然而，随着结构复杂性和窗户类型的增加，不同的比率有增加的趋势。