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Abstract


Date Drying by Infrared Dryer and Mathematical Modeling
In this study, date samples drying with different infrared drying temperature on drying time, drying rate and the applicability of some different drying models were investigated. Fresh date samples were dried into 5 mm thick slices via a laborator yscale infrared dryer. Experimental results showed that average drying times of samples, which they were dried by infrared drying technique at 60, 70 and 80 °C of temperatures were 310, 170 and 110 minutes, respectively. In order to determine drying kinetics with time and moisture content of the date samples, Henderson and Pabis, Newton, Page, Logarithmic, Two term, Two term Exponential, Wang and Singh, Diffusion Approach and Midilli et al. thin layer mathematical drying models were used to investigate the most suitable model. Based on evaluation by statistical tests, the Midilli et al. model having lowest reduced chi-squared (?2) and root mean square error (RMSE) values as well as the highest coefficient of determination (R2) was found to be the best model for describing the drying behavior of date samples.

Keywords
Infrared drying, date, drying kinetics, modeling


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