Abstract
The effects of wet-bulb temperature of drying media and material's pore diameter on drying characteristics and time were investigated experimentally. Glass bead (mean diameters of 110 and 400μm) packed beds which contained pure water or NaCl aqueous solution were used as porous sample material. The material mass and temperature changes were measured and the surface condition changes by salt crystallization were observed during drying. From these results, in cases where water was contained, the wet-bulb temperature was lower, the drying time was shorter. In cases where NaCI aqueous solution was contained, the wet-bulb temperature was lower, the drying time was longer and the material surface was covered with crystallized salt evenly distributed with glass beads with a mean diameter of 110μm.
