多孔介质墙体热湿耦合迁移实验方法

Experimental Method for Coupled Heat and Moisture Transfer in Porous Building Envelope

多孔介质墙体热湿耦合迁移对建筑热工性能、建筑能耗及室内环境有着重要影响,实验是研究该过程的重要方法.分析了多孔介质墙体热湿耦合迁移实验研究中的两个关键问题.首先,概述了多孔介质材料内瞬态湿度测量方法,提出了一种造价低、使用便捷并准确可靠的方法.然后,分析了国内外研究者常用的三种实验方案,设计了一种新方案,并根据新方案搭建了一个足尺寸实验台,为多孔介质墙体实验研究及数学模型验证打下基础.

The coupled heat and moisture transfer through porous building envelope has an important impact on the hydrothermal performance of building enclosure, energy consumption and indoor environment, for which experimental study is essential. Two key problems were investigated about the experimental study of coupled heat and moisture transfer in porous building envelope. After a straightforward review of methods for measuring moisture content of porous material,a convenient and inexpensive facility was proposed which can provide an exact result. Afterwards, three experimental study schemes were discussed, which were often adopted by researchers. And then a new scheme was proposed to the transient heat and moisture transfer process in porous building envelope ,which can be used to validate mathematical models more accurately,and on the basis of which a new full-scale experimental table was set up. This experimental table is a basis for studying the coupled heat and moisture transfer in porous building envelope and validating the mathematical model.