Effect of Temperature History on Mass Transfer Diffusivity in Convective Drying Process
نویسنده
چکیده
Convective hot air drying of potato slabs and the effects of drying air temperature and slab thickness have been investigated using a batch tray dryer. The temperature of drying chamber varied in four levels (50, 60, 70 and 80°C) and the slab thickness changed in three levels (0.5, 1 and 1.5 m). For the prediction of effective moisture diffusivity (D ), the conventional Fick’s diffusion model was modified considering the eff temperature variation of the sample at drying period. Comparing the predictions of conventional Fick’s model with those of modified model indicates that the model proposed in this study shows better agreement with the experimental data.
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