Drying-rate Equations of Agar Gel and Carrot based on Drying-shell Model

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Other Title
  • 殻状乾燥モデルに基づく寒天とにんじんの乾燥速度式
  • 殻状乾燥モデルに基づく寒天とにんじんの乾燥速度式〔英文〕
  • カクジョウ カンソウ モデル ニ モトズク カンテン ト ニンジン ノ カンソ

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In the previous paper, we studied the drying-rate equations based on the drying-shell models and the calculation methods of the rate parameters in the rate equations. In the present paper, the drying-rate equations of a agar gel and carrot based on the drying-shell model have been studied. The surface temperatures of the undrying-core can not be measured, so we took up with the wet-bulb temperatures and the center temperatures of the samples instead of the surface temperatures. The calculated results which used the center temperatures showed a similar tendency in the experimental results, but the over-all relationships were less satisfactory than the results which used the wet-bulb temperatures. From the comparisons of the calculated results described above, we may conclude that the drying-rate equations which used the wet-bulb temperatures instead of the surface temperatures of the undrying-core in order to simplify the calculations were better than the other, and more adequate for the design of various drying apparatuses.

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