摘要：Different drying methods for plum fruits were compared in this case study. Samples were dried at a temperature of 70°C using the method of hot air drying as well using hybrid solar drying at three levels of air velocity (0.5, 1, and 2 m/s) and open sun drying. The dried samples were then compared on the basis of changes in colour, shrinkage and rehydration. The effect of air velocity on colour change was significant ( P < 0.05) at the three different levels (0.5, 1, and 2 m/s), whereas effects on shrinkage and rehydration ratio were not significant ( P < 0.05). The best conditions for plum drying with respect to values of colour change, shrinkage, rehydration ratio and the drying costs were obtained for the plums dried using a hybrid solar dryer at an air velocity of 1 m/s.
关键词：colour; rehydration; shrinkage; hybrid solar dryer
