Abstract
Wheat was dried under the experimental conditions of temperature ranging from 35 to 70C, relative humidity of drying air from 6% to 35%, air velocity from 0.20 to 0.26 m/s and initial moisture content 22% to 30% d.b. Thin-layer drying curves were worked out from the experimental data showing the relation of moisture ratio versus time as effected by temperature and air velocity. Three types of typical thin-layer drying equations were used to assess the fitness to the experimental data. Among them Page's Equation was found to give the best fit. The results show that, drying air temperature and relative humidity have great effect on drying rate. Air velocity also has some effect on the constant n in Page Equation.
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