房间围护结构间辐射换热计算的吸收系数法
Absorption factor method for calculating radiant heat transfer among inner surfaces of room enclosure
摘要：
传统的辐射换热计算中引入的有效辐射可以相对准确计算出净辐射换热量，但在求解方程组时较复杂。实际工程计算中作相应简化，但误差较大。吸收系数是由角系数导出的一个相关因子，采用吸收系数法计算辐射换热，不仅反映了表面之间的直接辐射，同时综合考虑了其他各表面的反射因素对辐射换热的影响，是较适合计算房间各围护结构间辐射换热的一种方法。
关键词：有效辐射,简化,误差,吸收系数
Abstract：
The net radiant heat transfer can be obtained more accurately by introducing the effective radiation into the traditional calculation method of radiant heat transfer. However, the equation solving is relatively complicated. The simplified calculation for actual engineering purpose tends to resulting in larger error. The absorption factor is derived from the angle factor, and absorption factor method is more suitable for calculating the radiant heat transfer, in which both the direct heat radiation and the reflection influence of other surfaces are involved.
Keywords:effective heat radiation, simplification, deviation, absorption factor