engleski

Experimental validation of thin-layer drying models

Present work was aimed at investigating applicability of the proposed correlation equations which link the coefficients of the thin layer equations. Materials of different properties were chosen and dried in four types of laboratory dryers. Experimental data were approximated applying the commonest thin layer equations: Lewis equation, modified Page’ s model and Fick’ s second law. The best match was achieved with the modified Page’ s model. Applicability of the stated literature correlations was confirmed. Irrespective of the match between measuring data (X=f(t)) and Lewis equation, the evaluated drying constant K allowed evaluation of the parameters of the employed two-parameter models.

convective drying ; drying kinetics ; microwave drying ; thin-layer equations ; vacuum drying

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