Abstract: Based on the mechanism of heat and moisture transfer through porous media, the dynamic mathematical equations for the coupled heat and moisture transfer in building components are derived, in which the humidity gradient is considered as the heat source or heat sink ,and the temperature gradient is considered as the moisture source or moisture sink. Meanwhile, an analytical method by using the transfer function is proposed to study the processes of coupled heat and moisture transfer in building elements. In this paper, the analytical calculations are carried out for the coupled heat and moisture transfer in bamboo plywood of a bamboo composite wall, to obtain the transient distributions of temperature and moisture content by using the above method. The results agree with the measured data, which shows that the mathematical equations and the solving method presented are reliable, and can be used to study bamboo composite walls, as well as for the development of bamboo as a new building material.
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Received: 07 June 2010
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