摘要
以温度和相对湿度为驱动势建立了热湿耦合迁移模型(CHMT),采用有限差分法以加权隐式格式离散控制方程,用C++编制计算程序;采用自编程序与有限元模拟软件COMSOL Multiphysics进行求解,将计算结果与实验数据和HAMSTAD验证实例进行对比,验证了模型的准确性;以上海、武汉和重庆的建筑南立面挤塑式聚苯乙烯(XPS)外保温砖墙为例,分别计算墙体在供冷季和供暖季的逐时得热量,并以累计得热量为指标,分析热湿耦合迁移对能耗模拟的影响.结果表明:当不考虑热湿耦合迁移时,上海、武汉和重庆的墙体在供冷季累计得热分别被低估10.04%,8.69%和9.11%;在供暖季累计失热分别被低估6.34%,6.62%和6.3%,因此在计算长江流域建筑能耗时应考虑热湿耦合迁移的影响.
A coupled heat and moisture transfer(CHMT)model was established with temperature and relative humidity as driving potentials.The equations were discretized by the finite difference method in weighted implicit scheme.The calculation program was compiled with C++.Then,the results of the program and finite element simulation software COMSOL Multiphysics validated the correctness of the model through HAMSTAD example and experimental data.Finally,taking the accumulative heat gains of the wall as indicator,the XPS thermal insulation south facade wall of Shanghai,Wuhan and Chongqing were taken as examples to analyze the influence of moisture transfer on building energy consumption.The results show that ignoring of the moisture transfer,the cumulative total heat gains of Shanghai,Wuhan and Chongqing in cooling season is underestimated by 10.04%,8.69%and 9.11%,respectively.And the cumulative total heat loss in heating season is underestimated by 6.34%,6.62%and 6.13%,respectively.Therefore,the influence of the coupled heat and moisture transfer should be considered when calculating the building energy consumption along the Yangtze River,or the actual energy consumption will be underestimated.
作者
陈友明
鲍洋
董文强
房爱民
CHEN Youming;BAO Yang;DONG Wenqiang;FANG Aimin(College of Civil Engineering,Hunan University,Changsha 410082,China)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第2期67-72,共6页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
“十三五”国家重点研发计划资助项目(2017YFC0702201).
关键词
多孔介质墙体
热湿耦合迁移(CHMT)
非稳态传热
长江流域
建筑能耗模拟
porous media walls
coupled heat and moisture transfer(CHMT)
unsteady-state heat transfer
Yangtze River basin
building energy consumption simulation
作者简介
陈友明(1966-),男,教授,E-mail:ymchen@hnu.edu.cn.
