建筑能耗和负荷受到通过窗户中心玻璃区域的太阳能增益和热传递的强烈影响。设计了计算相应能源性能指标（例如SHGC和U系数）的方法。模拟提供了检查设计选项的机会，如低发射率或太阳能控制涂层、玻璃着色、替代填充气体和透热玻璃层。目前的模型使用基于光能传递的方法来量化长波辐射交换。提出了一种多层体系热分析的新方法。这种方法通过使用电阻网络来量化对流和辐射交换，具有特殊的通用性。“跳跃”电阻器允许层间或透热层之间的气流，或两者的任意组合。 室内和室外的空气和平均辐射温度可能不同。此外，还设计了一种更通用的方法，用于计算优点指数，而不限制模拟模型的通用性——适用于任何环境温度和日照条件。这些方法特别适用于分析与百叶窗、窗帘、卷帘和防虫网等遮阳层结合使用的玻璃系统。当与整个建筑性能模拟结合使用时，这些方法也提供了新的可能性、速度和便利性。引文:ASHRAE Transactions，第114卷，pt。2、盐湖城2008

Building energy consumption and loads are strongly influenced by solar gain and heat transfer through the centre-glass area of windows. Methods have been devised to calculate the corresponding energy performance indices (e.g., SHGC and U-factor). Simulation offers the opportunity to examine design options such as low-emissivity or solar-control coatings, glass tints, substitute fill gases and diathermanous glazing layers. Current models use a radiosity-based approach to quantify longwave radiant exchange. A new method is presented for the thermal analysis of multilayer systems. This method, by using a resistor network to quantify both convective and radiant exchange, offers exceptional generality. “Jump” resistors allow for airflow between layers, or diathermanous layers, or any combination of the two. The air and mean radiant temperatures can differ on both the indoor and outdoor sides. In addition a more general method has been devised for calculating indices of merit without restricting the generality of the simulation model – for any set of environmental temperature and insolation conditions. These methods are especially useful for the analysis of glazing systems used in combination with shading layers such as venetian blinds, curtains, roller blinds and insect screens. These methods also offer new possibilities, speed and convenience when used in conjunction with whole building performance simulations.