Drying Kinetics of Biological Materials in a Combined Solar Dryer

145 Abstract The paper presents the investigative findings of the drying process in a combined solar dryer. Combined solar dryer has collector of solar energy (1m x 2m), drying are consists from dryers the chambers with pans (eight pan measuring 0.3m x 0.5m) and recirculating channel, flow regulators, fans, drain channel and support structure. In kiln drying is performed carrots. Drying has been carried 14 and 15 10.2014.Years. We measured the following values: the temperature of the outside air, the temperature of the drying agent at four positions, the mass of moist material, intensity of solar radiation. Based on the measured values were determined for each pan in particular: absolute moisture content of materials, isolated moist on each of the pans, the relative moisture content of materials, absolute humidity of the drying agent, the drying rate, the critical moisture, characteristic moisture.