Solar, Biomass and Hybrid Dryers - BioEnergy Discussion Lists

The main blower installed between the furnace and the drying chamber draws theambient air through the furnace-heat exchanger unit, and supplies hot air to thedrying chamber. An S-shaped duct is installed at the air inlet to the heat exchanger.The mouth of the duct is located away from the combustion chamber to avoidsuction of ashes that may otherwise contaminate the product to be dried. The fuelhopper has a capacity of three sacks of rice hull per loading which lasts for about 3 to4 hours of dryer operation.The dryer has been tested with mango and banana. The quality of the dried bananaand mango were found to be very good, with no browning observed. The total costof fabricating this dryer is about US$1,800.49