Abstract
In order to clarity the characteristics of water transport at gas diffusion layer (GDL) in stack of polymer electrolyte membrane fuel cell (PEMPC), in this paper, a measurement for the effect of porosity, plate thickness and water temperature on moisture transport from constant temperature water to dry air through porous media having very small pores was performed. In addition, in order to evaluate the degree of moisture absorption of air, a parameter called the humidity absorption rate was introduced. It was shown that the humidity absorption rate decreases with respect to the increase of the air velocity and water temperature.
