Numerical Analysis of the Dynamic Heat and Moisture Coupling Transfer Within Typical Building Walls in Severe Cold Region of China
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Based on Delphin software, this paper studies the laws and features of dynamic heat and moisture coupling transfer inside typical composite walls in severe cold regions of northeastern China. Firstly, the numerical model was validated by the experimental data in the literature. On this basis, the wet stability time and its influencing factors, internal water content distribution and ice content distribution within typical composite walls were studied under unsteady environmental conditions. The effect of the initial moisture content on the wet stability time of the composite wall was analyzed. The time required for the composite wall to reach moisture stability is predicted. And the wet stable moisture content of the typical composite wall in the severe cold area is given. Altogether it aims to lay technical support for the analysis and modification of wet accumulation problems, as well as the wall wet risk estimation and evaluation for existing building walls.
KeywordsHeat and moisture transfer Building materials Wet accumulation
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