多层墙体热湿耦合传递模型及验证  

Mathematical model and its validation of coupled heat and moisture transfer for multilayer wall

作　　者：黄建恩[1] 吕恒林[1] 冯伟[1] 

机构地区：[1]中国矿业大学力学与建筑工程学院,江苏徐州221116

出　　处：《土木建筑与环境工程》2015年第1期18-22,共5页Journal of Civil,Architectural & Environment Engineering

基　　金：江苏省"六大人才高峰"资助项目(2010-JZ-006);江苏省优势学科建设工程(SA1205)~~

摘　　要：从非平衡热力学角度论证了多层墙体热湿耦合过程采用水蒸气分压力和温度作为驱动势的合理性。由于水蒸气分压力是含湿量和温度的函数,利用全微分思想,建立了多层墙体热湿耦合传递模型,该方法可避免Budaiwi方法在热湿耦合模型建立过程中采用的空气含湿量与相对湿度间的近似表达式,而且简化了方程系数,便于方程的求解。通过对多层墙体求解结果的对比,验证了该模型的有效性。Its rationality of temperature and water vapor partial pressure as driving potential for coupled heat and moisture transfer was demonstrated based on non-equilibrium thermodynamics. As water vapor partial pressure is a function of moisture content and temperature, mathematical model of coupled heat and moisture transfer for muhilayer wall were established according to the theory of total differential. The approximate expressions between humidity content and relative humidity of air used in Budaiwi method could be avoided. The coefficients of mathematical model were simplified and could improve efficiency of solution. Its validation was illustrated by contrasting and analyzing the simulation results of a muhilayer wall.

关 键 词：数学模型 墙体 热传递 湿传递 热湿耦合 

分 类 号：TU111.19[建筑科学—建筑理论]