墙体传热及现场测其导热系数的反问题方法

Method of Opposed Question for Heat Transfer of Wall and Field Testing of Thermal Conductivity

用计算机对房屋外墙冬季的传热过程进行了仿真分析,结合实例,给出墙体内、外侧温度响应,墙体温度分布,流进及流出墙体热流密度的变化规律。在此基础上,提出了现场测墙体导热系数的反问题方法。与传统的“稳态法”作比较,本方法精度较高,并对减少现场测量参数作了探讨。

A computer is used to imitate the heat transfer process of a real building wall in winter.With practical examples,the temperature response of inside and outside walls,the temperature distrubution of wall body,the law of variation of heat flux density of entry and exit wall bodies are presented.On the basis of that,a method of opposed question of field testing thermal conductivity of wall body has been pre- sented.In comparison with the traditional″steady-state method″,the accuracy of this method is higher.This paper also studies the way to reduce the parameters on field testing.