多层墙体热湿耦合传递模型及验证.pdfVIP

学兔兔 土 木 建 筑 与 环 境 工 程 第37卷第1期 Journal of Civil．Architectural＆ Environmental Engineering Vo1．37 NO．1 2015年 2月 Feb．2015 doi：10．11835／j．issn．1674—4764．2015．01．004 多层墙体热湿耦合传递模型及验证 黄建恩，吕恒林，冯 伟 (中国矿业大学，力学与建筑Z-程学院，江苏徐州 221116) 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。 关键词：数学模型；墙体；热传递；湿传递；热湿耦合 中图分类号：TU111．19 文献标志码：A 文章编号：l674—4764(2015)01 0018—05 Mathematical model and its validation of coupled heat and moisture transfer for multilayer wall Huang Jiun’en，LyL，Henglin，Feng Wei (School of Mechanics＆ Civil Engineering。China University of MiningTechnology，Xuzhou 221l16．Jiangsu，P． Abstract：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 differentia1．The approximate expressions between humiditv 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 wal1． Key words：mathematical models；wall