Case studies on the effect of the air drying conditions on the convective drying of quinces

The objective of the current study is to examine experimentally the thin-layer drying behavior of quince slices as a function of drying conditions. In a laboratory thermal convective dryer, experiments were conducted at air temperatures of 40, 50 and 60 °C and average air velocities of 1, 2 and 3 ms −1 . Increasing temperature and velocity resulted to a decrease of the total time of drying. The experimental data in terms of moisture ratio were fitted with three state-of-the-art thin-layer drying models. In the ranges measured, the values of the effective moisture diffusivity ( D eff ) were obtained between 2.67×10 −10 and 8.17×10 −10 m 2 s −1 . The activation energy ( E α ) varied between 36.99 and 42.59 kJ mol −1 .