Comparative analysis on heat and moisture transfer of composite insulation walls

Abstract Firstly, the influence of heat and moisture transfer on composite insulation walls was initially considered. Relying on the established theory of heat and moisture coupled transfer in walls and taking into account the specific climate conditions of regions with hot summers and cold winters, a non-steady-state heat and moisture coupled model was developed to simulate the processes of heat and moisture transfer. Subsequently, based on the one-dimensional stable heat transfer theory, the heat transfer situation for winter insulation was calculated. Then, practical methods for on-site temperature and humidity measurements were explored and implemented. Through analysis, comparison, and mutual verification of the calculated values and the measured values, it was observed that both sets of data showed consistent trends, thereby verifying their accuracy and correlation. The findings of this study provide valuable reference data for understanding the heat and moisture migration within building walls and offer solutions for optimizing thermal insulation strategies.