摘要
以多孔介质传热传质学为基础,以墙体中的空气含湿率和温度为驱动势建立了多层墙体的一维瞬态热湿耦合传递方程,运用有限差分法来解此耦合方程.以长沙地区为例,分析了我国南方地区典型的多层墙体石膏板-玻璃纤维-砖复合墙体在热湿气候环境下的水蒸气分布规律和温度分布规律.模拟结果表明,在中国南方地区,由于长期处于高温高湿的环境之下,墙体内出现湿积累现象,须采取有效措施防止霉菌的生长.
Based on the heat and moisture transfer through porous media, a 1-D transient hygrothermal model for multilayer wall was established by using air humidity ratio and temperature as the driving potentials. The solution for the governing equations was obtained numerically by implementing the finite-difference scheme. Take the Changsha region as an example. The distribution of temperature and humidity ratio inside a gypsum-fiber glass insulation-brick wall, which is typical in South China, was obtained. The simulation results have indicated that, in South China, due to the effect of high temperature and humidity ratio, the content of moisture inside the wall increases with the time. This has an adverse effect on building structure, and high humidity ratio may result in mould growth. Some measures should be taken to prevent mould growth.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第8期1-4,共4页
Journal of Hunan University:Natural Sciences
基金
教育部高等学校博士学科点专项基金资助项目(20060532015)
关键词
建筑构件
热湿耦合传递
含湿率
南方建筑
有限差分法
building components
coupled heat and mass transfer
humidity ratio
southern building
finite difference method
