INFLUENCE OF HYSTERESIS IN SORPTION ISOTHERM AND MOISTURE CONDUCTIVITY ON CONDENSATION AND EVAPORATION PROCESSES

It is well known that some porous materials used as building walls show hysteresis in ad/desorption sorption isotherms. Some materials similarly show hysteresis in moisture conductivity. Sorption isotherm and moisture conductivity have an effect on heat and moisture transfer in materials, But there is little information available on the degree of the influence of hysteresis, especially that of moisture conductivity. In this study, we clarified the effect of hysteresis of sorption isotherm and moisture conductivity on heat and moisture behavior in ALC using the simultaneous heat and moisture transport equations and the independent domain theory for the experiment of repeat both condensation and evaporation process.