建筑墙体的延时与削弱作用

The Time Lag and Decrement Effects of Building Wall

本文采用数值方法分析了建筑墙体的材料与厚度对墙体延时与削弱作用的影响。基于这个目的,考虑了一维墙体带第三类周期性边界条件的非稳态导热。通过分析墙体材料的导热系数k、热容C和墙体厚度对墙体延时与削弱作用的影响,发现热容C和导热系数k对墙体延时与削弱作用影响明显。墙体达到一定厚度则具有比较好的延时与削弱效果。

In this study, a numerical method was given to investigate the effect of wall＇s material and thickness on time lag and decrement factor. For this purpose, one-dimensional transient heat conduction with the third period boundary condition was considered. By analyzing the thermal conductivity, heat capacity and the thickness of the wall, it is found that heat capacity and the thermal conductivity have distinct effect on time lag and the decrement factor. When the thickness of the wall reaches an extent, it will effectively impact on time lag and decrement effect.