在ASHRAE和美国能源部（DOE）联合赞助的一个项目中，研究了一种通过复杂的开窗系统预测太阳能热增益的新方法，该系统涉及非特殊层，如遮阳帘或百叶窗。在该方法中，使用扫描辐射计测量开窗系统各层的双向辐射透射率和反射率。然后，通过透射/多次反射计算，从测量的层特性计算出包含这些层的系统特性。计算得出了开窗系统的总方向半球透射率和逐层吸收率。这些特性反过来又与吸收太阳能向内流动部分的特定层测量相结合，以产生整体太阳能热增益系数。 另一篇论文概述了该方法，并提供了计算的物理推导。在一系列相关论文的第二篇中，介绍了矩阵层计算的详细发展。关键词:计算，太阳热增益，窗口，阴影，百叶窗，测量，辐射测量，反射系数，透射率，特性，光学特性，研究，太阳辐射。引用:研讨会，ASHRAE Trans。1994年，第100卷，第一部分

A new method of predicting the solar heat gain through complex fenestration systems involving nonspecular layers, such as shades or blinds, has been examined in a project jointly sponsored by ASHRAE and the US Department of Energy (DOE). In this method, a scanning radiometer is used to measure the bidirectional radiative transmittance and reflectance of each layer of a fenestration system. The properties of systems containing these layers are then builtup computationally from the measured layer properties using a transmission/multiple-reflection calculation. The calculation produces the total directional-hemispherical transmittance of the fenestration system and the layer-by-layer absorptances. These properties are, in turn, combined with layer-specific measurements of the inward-flowing fractions of absorbed solar energy to produce the overall solar heat gain coefficient. A companion paper outlined the method and provided the physical derivation of the calculation. In this second of a series of related papers, the detailed development of the matrix layer calculation is presented.KEYWORDS: calculating, solar heat gain, windows, shades, blinds, measuring, radiometry, reflection factor, transmittance, properties, optical properties, research, solar radiation.