介绍了一个三维数学模型的发展，该模型用于计算由透明和/或不透明介质分隔的表面之间的辐射热交换。模型公式适用于内表面的任意布置，以及封闭空间内障碍物的任意放置。采用离散坐标辐射模型，能够分析不规则几何形状和不同表面温度和辐射特性的影响。通过比较四种不同外壳的计算传热率和精确光能传递法确定的传热率，验证了该模型。 选择这四个外壳是为了提供广泛的验证。这种基于离散坐标法的三维模型可应用于建筑物，以帮助设计工程师确定辐射供暖系统的尺寸。通过将该模型与对流传热模型和热舒适模型耦合，可以轻松有效地绘制给定辐射加热器位置下整个房间的舒适度。此外，飞机、卡车、家具和隔墙等物体可以很容易地结合在一起，以确定它们对辐射供暖系统性能的影响。 关键词:1995年，辐射冷却，辐射加热，热流，计算，性能，热损失，辐射板，隔板，家具，热舒适性，尺寸，设计引用:研讨会，ASHRAE Trans。1995年，第101卷，第一部分，论文编号CH-95-1-11525-527

Presents the development of a three-dimensional mathematical model to compute the radiant heat exchange between surfaces separated by a transparent and/or opaque medium. The model formulation accommodates arbitrary arrangements of the interior surfaces, as well as arbitrary placement of obstacles within the enclosure. The discrete ordinates radiation model is applied and has the capability to analyse the effect of irregular geometries and diverse surface temperatures and radiative properties. The model is verified by comparing calculated heat transfer rates to heat transfer rates determined from the exact radiosity method for four different enclosures. The four enclosures were selected to provide a wide range of verification. This three-dimensional model based on the discrete ordinates method can be applied to a building to assist the design engineer in sizing a radiant heating system. By coupling this model with a convective heat transfer model and a thermal comfort model, the comfort levels throughout the room can be easily and effectively mapped for a given radiant heater location. In addition, objects such as airplanes, trucks, furniture, and partitions can be easily incorporated to determine their effect on the performance of the radiant heating system.KEYWORDS: year 1995, radiant cooling, radiant heating, heat flow, calculating, performance, heat loss, radiant panels, partitions, furniture, thermal comfort, sizing, designing