| Abstract: Studies on modeling of thin layer drying kinetics of grape juice concentrate were conducted using pilot scale convective dryer. Experiments were conducted in temperature range of 55-750C and drying bed thickness of 3-7 mm, to attain desired moisture content (14±1% db). Different thin layer drying models like newton, page, logarithmic, two term, two term exponential and midilli models were fitted to the experimental data of convective dehydration and their adequacy of fit was investigated. All the samples witnessed falling rate period drying irrespective of the selected temperature and thickness. The effective moisture diffusivity and activation energy were found in range of 7.18-2.56 m2/sec and 26.07-21.59 kJ/mole respectively for 3-7 mm... |
