Heat and Moisture Transfer Properties of Mud Wall Application of Simultaneous Heat and a Moisture Transfer Model for Hygroscopic Range to High Humidity Conditions

Abstract

The mud wall is used traditionally for Japanese houses. For effective use, it is necessary to clarify the moisture performance of it quantitatively. Firstly the sorption isotherm and the water vapor permeability of the mud wall were measured. Secondly, the specimen was exposed to the transient absorption and desorption processes including relative humidity of 90%. The processes were numerically analyzed using hygrothermal model for the hygroscopic range, and the calculated results agreed with the experimental results, which suggests the validity of the measured moisture properties and of the application of the hygroscopic model to the conditions including high humidity.