Modelling of moisture and thermal transient behaviour of multilayer non-cavity walls

摘要

This paper describes a dynamic model for evaluating the transient thermal and moisture transfer behaviour in multi-layer noncavity wall constructions. Both heat and moisture transfer are simultaneously considered and their interactions are modelled. An implicit finite-difference scheme has been utilized to solve the tempearture and air moisture content distributions across the different layers of the wall system. The model mathematical formulations pertaining to the method of solution are described together with interstitial condensation checking and node distribution criteria for transient moisture transfer.