CUP DIAMETER AND HORIZONTAL DISTRIBUTION OF THE WATER VAPOR PRESSURE THROUGH THE PERFORATED PLASTIC PLATES

Abstract

The horizontal distribution of the water vapor pressure through perforated plastic plates was studied using the cup method. To analyze the horizontal distribution, 3 different factors, that is, water vapor permeability, height from the plate surface and inside diameter of the cup were modified. The results showed that the water vapor pressures above the perforated plates were constant at a distance of more than 1.5cm from the inside wall of the cups. Therefore, the diameter of the cup should be at least greater than 3cm in order to analyze the water vapor diffusion mechanism based on the vertical distribution of the water vapor pressure.