Fig. 1. Schematic diagram of the hot-air impingent dryer 1. A conveyor belt in drying
chamber was used to move product trays. 2. Plenum chamber with centrifugal fan. 3.
Top air vents (T1eT4) to blow hot air from plenum chamber downward. 4. Bottom air
vents (B1eB4). 5. Air distribution chutes in the drying chamber.