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۱Study on Drying Kinetics of Paddy Rice: Intermittent Drying
اطلاعات انتشار: Iranian Journal of Chemistry and Chemical Engineering (IJCCE)، سي و پنجم،شماره۳(پياپي ۷۹)، ۲۰۱۶، سال
تعداد صفحات: ۱۳
The intermittent drying characteristics of an Iranian popular paddy rice variety were experimentally investigated to determine the drying kinetics and obtain the effective moisture diffusivity. A lab–scale fluidized bed dryer was designed and constructed to enable obtaining the required results while controlling critical drying parameters. The effects of drying temperature and tempering period on drying kinetics and moisture diffusivity were studied. The results showed a significant effect on drying performance and effective moisture diffusivity by adding tempering stage. Drying rate improved sharply by implementing the tempering stage, increase of drying air temperature as well as the tempering duration. Several thin layer drying models were fitted separately to experimental data of each drying stages namely pre–tempering and post–tempering and suitability of these models were examined using the statistical analysis. The Midilli and Tow–Term model were found to be the most appropriate one for the first and second drying stages, respectively.
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