1996 Volume 58 Issue 3 Pages 3-10
Rush-bundles are usually packed vertically in a dryer and are dried by hot air after immersing in mud water. At the later period of the drying process, water vaporization rate decreases significantly and the thermal efficiency becomes much lower. If we feed back the hot exhaust gas into the supplied hot air during the later period, the thermal efficiency is expected to be improved. In order to estimate the improvement of the thermal efficiency by this controlled feedback method, we simulated the process of rush drying with theoretical calculation and compared the controlled feedback drying with non-feedback one. As a result, we obtained the following conclusion; Total thermal energy consumption for rush-drying decreases more than 10% by employing controlled feedback system.
