Abstract
The conventional plane heater method for the measurement of heat-moisture transportation properties through fabrics have been devised by injecting water through a teflon tube onto a glass fiber filter paper as a skin model.
Operational merits of this method are no need of weighing and exchanging a wet filter for every measurement and little disturbance to the ambient condition. Further the weight and the temperature of water as well as the injection rate was freely controlled and the data of heat loss was measured accurately in real time even in the starting period of evaporation. These features make possible to simulate the various state of sweating and to measure the transient process of heat and moisture transportation.
The leak of evaporated water through the gap between the frames was estimated below 2%. The observed value of evaporation heat of the whole water injected was found to be larger by 6% (max.) than the latent heat of evaporation value of water, because the transfer of dry heat might be accel reated by evaporation.
These may be important factors on the interpretation of characteristic values of fabrics not only here in the injection method but in the conventional wet paper method.
From the above devices, we estimated heat and moisture transport properties for several kinds of fabrics and compared them with the results of the previous report.
