Studies of Drying-rate Equations based on Uniform Drying Models

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  • 均一乾燥モデルに基づく乾燥速度式に関する研究
  • 均一乾燥モデルに基づく乾燥速度式に関する研究〔英文〕
  • キンイツ カンソウ モデル ニ モトズク カンソウ ソクドシキ ニカンスルケン

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Abstract

In order to design and automatically control various drying apparatuses, it is required to determine the simple approximated drying-rate equations and to obtain the rate parameters for the equations. In a previous paper, we studied the drying-rate equations based on the drying-shell models. In the present paper, we postulated the drying-rate equations based on the uniform drying models, and calculated the rate parameters in the drying-rate equations of agar gel, carrot and cooked rice. We studied the drying-rate equations which are postulated by the consideration of the drying-surface area S and by assuming that S may be correlated to the exponent of undisappeared water content (w-we). From the comparison of the calculated results, we concluded that S might be correlated to the exponent of (w-we), and that the order of the drying-rate equations which are postulated by assuming that S might be correlated to (w-we), is 0.5-1.0 for the used samples. The calculated results of agar gel and carrot for the uniform drying model were similar to those for the drying-shell model described in a previous paper. For much results, former model is better than the latter one as the former is less intricated.

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