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study on drying kinetics of paddy rice: intermittent drying
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نویسنده
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golmohammadi morteza ,golmohammadi morteza ,foroughi-dahr mohammad ,rajabi hamaneh mehdi ,shojamoradi ali reza ,hashemi jalaledin ,hashemi jalaledin
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منبع
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iranian journal of chemistry and chemical engineering - 2016 - دوره : 35 - شماره : 3 - صفحه:105 -117
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چکیده
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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 labscale 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 pretempering and posttempering and suitability of these models were examined using the statistical analysis. the midilli and towterm model were found to be the most appropriate one for the first and second drying stages, respectively.
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کلیدواژه
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intermittent drying ,drying model ,effective moisture diffusivity ,paddy rice ,tempering ,statistical analysis
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آدرس
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university of tehran, school of chemical engineering, college of engineering, ایران. tarbiat modares university, faculty of chemical engineering, ایران, university of tehran, school of chemical engineering, college of engineering, ایران. tarbiat modares university, faculty of chemical engineering, ایران, university of tehran, school of chemical engineering, college of engineering, ایران, university of tehran, school of chemical engineering, college of engineering, ایران, university of tehran, school of chemical engineering, college of engineering, ایران, university of tehran, school of chemical engineering, college of engineering, ایران. mcgill university, pulp and paper research centre, department of chemical engineering, canada, university of tehran, school of chemical engineering, college of engineering, ایران. mcgill university, pulp and paper research centre, department of chemical engineering, canada
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Authors
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