Journal of the Faculty of Fisheries and Animal Husbandry, Hiroshima University Volume 16 Issue 2
1977-12-25 発行

Studies of Drying-rate Equations based on Uniform Drying Models

均一乾燥モデルに基づく乾燥速度式に関する研究
Kubota, Kiyoshi
Suzuki, Kanichi
Hosaka, Hideaki
Hosokawa, Yoshihiko
Hironaka, Kazunori
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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.