摘要
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,将用此方程计算出的值跟用忽略湿传递的导热方程计算出的值进行对比得出湿传递对墙体热湿性能的影响。结果表明,对于吸放湿墙体而言,湿传递对墙体的热湿性能有着非常重要的影响。在进行墙体传热计算时,如果忽略墙体中的湿传递会产生较大误差,不能精确的预测墙体内的温度分布情况,并且导致计算出的空调负荷偏小,进而影响到空调的实际效果。
The 1-D transient hydrothermal model for multilayer wall was established by using air humidity ratio and temperature as the driving potentials.Regard the well-known conduction equation as sub-model which neglects the moisture effect.Results calculated by hydrothermal model are compared with the results calculated by the sub-model.This comparison results showed that moisture transfer have strong effect on hydrothermal performance of multilayer wall.Omitting moisture transfer will cause large errors and can't predict the temperature distribution accurately.Furthermore,it will cause the air conditioning load have a great deviation and this will have a bad effect on the air conditioning operation effect.
出处
《建筑技术》
2014年第8期747-750,共4页
Architecture Technology
基金
国家自然科学基金资助项目(51208247
51078127)
江西省教育厅青年科学基金资助项目(GJJ13011)
关键词
热湿耦合传递
热流通量
多层墙体
空气含湿率
coupled heat and moisture transfer
thermal flux
multilayer wall
air humidity ratio
