大空间建筑室内表面温度对流辐射耦合换热计算

A method for calculating surface temperature in the case of coupled convective and radiative heat transfer in a large space building

建立了大空间建筑室内壁面导热、辐射和对流耦合换热热平衡方程,结合Gebhart吸收系数,利用预测室内空气垂直温度分布简易模型,提出了室内各表面温度分布的理论计算方法. 对国外模型实验数据验证的结果表明,计算所得表面温度与实验值吻合,表明了这是一种预测大空间建筑表面温度的有效方法.

For a large space building, the favourable fields of temperature and velocity are the premise for a comfortable thermal environment. The key to the settlement of approprite temperature and velocity fields is to find the way of forecasting surface temperature. In the paper, a heat equalization equation for coupled thermal conduction, convection and radiation in a large space building is founded. A theoretical method, by use of Gebhart absorption coefficient and a simple model for vertical temperature distribution, is put forward for calculating the surface temperature of the building. The calculation results are in good agreement with that of scale experiments presented in a certain overseas reference. It shows that it is an effective method for predicting the surface temperature of a large space building.