描述基于光线追踪程序开发的算法，该程序用于计算相邻结构反射的太阳辐射对建筑物中太阳增益的贡献。这些算法在精度和计算时间方面都得到了优化，可以链接到建筑能耗模拟程序，并在DOS机器上运行。回顾了计算表面间辐射交换的常用方法，描述了算法，并给出了一个小型商业建筑的结果。研究发现，镜面反射表面通过窗户增加的太阳增益是通过窗户增加的太阳增益的10倍多，而只有地面反射回窗户。 将详细计算的结果与经过时间和精度优化的结果进行比较。关键词:太阳热增益，日照，反射太阳辐射，太阳辐射，商业，建筑，比较，计算，算法科学:研讨会，ASHRAE Trans。1994年，第100卷，第2部分

Describes algorithms based on a ray-tracing program developed to calculate the contribution of reflected solar radiation from neighbouring structures to the solar gain in a building. States the algorithms are optimised for accuracy and computation time, can be linked to building energy simulation programs and run on DOS machines. Reviews the common approaches for calculating the exchange of radiation between surfaces, describes the algorithms and presents results for a small commercial building. Finds that specularly reflecting surfaces can increase solar gain through windows by more than 10 times the amount of that through a window with only the ground reflecting back to it. Compares results from detailed calculations with those optimised for time and accuracy.KEYWORDS: Solar heat gain, insolation, reflected solar radiation, solar radiation, commercial, buildings, comparing, calculating, algorithms