Abstract
In this study, we pay attention to the effects of the absorption and desorption of water vapor in clothes on the retaining warmth in the steady state region and we produced a simple device (Fig.1) that is able to control the diffusion of water vapor and heat transfer in a material from the unsteady state region to the steady state region. Two samples (AKN and EKN), of which are knit fabric with and without the absorption and desorption ,respectively are used. At first in the case of heating by dry air, the temperature change of inside and outside of samples are measured. Measured temperature differences of each samples show a same value (Fig.3). And then in the case of heating by moist air, the temperature change of samples are also measured, respectively(Fig.5). But these temperature differences in the steady state show a different value. These results mean that AKN has more heat-retaining than EKN.
