Abstract
The time varying outdoor climatic conditions result heat, air and moisture transfer across building enclosures and then affect indoor environment. In this paper a transient model (HAM) coupled heat, air and moisture transfer through multilayered porous media is developed. Influence of three different hygroscopic materials on heat and moisture transfer is focused on and compared according to the changes of temperature and relative humidity at the inner surface of building envelope and indoor room. The numerical results indicate that the diatomite is the best materials among the three ones to reduce the fluctuation of temperature and relative humidity in the room.
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