Temperature variations in drying of sulfuric acid solutions in sand beds Part I: Temperature variations in the bed during the drying of water

Local temperature variations were determined in sand beds during drying.Two different particle sizes of 200 µm and 550 gm's were used in the experiments. Drying was conducted at 80°C and 150°C. Highest temperature were observed at the bottom of the bed due to capillary lift during drying at 80°C.Rapidevaporation at 150°C ambient temperature caused heat to be transferred from both the surface and bottom of the bed, so the coolest section was at the center. Isothermal conditions were approached as the capillarysize increased as in 550µm particle beds. © 1995.