冷桥对墙体平均传热系数的影响

Influence of Thermal Bridge on Determination of Mean Heat Transfer Coefficient for External Walls

本文基于控制容积法编制了平面温度场分析程序，利用该程序对普通住宅的一个典型开间墙体内部二维温度分布进行了模拟。把按二维温度分布计算出的墙体平均传热系数与按标准的一维面积加权方法计算出的平均传热系数作比较，两者差别很大。可见冷桥对墙体传热的影响只有通过二维、三维的温度场模拟才能比较准确地反映出来。

Based on the control volume method, a computer program for planar temperature distribution analysis has been developed. Temperature distributions inside typical walls of a residential building have been simulated with this program. The difference between the wall mean heat transfer coefficient calculated from the simulated results and that from one dimension weighted method is evident. That means the influence of thermal bridge on the heat transfer across a wall can only be accurately calculated by two or three dimension temperature distribution simulation.