DRYING KINETICS OF APRICOTS

被引：40

作者：

VAGENAS, GK

MARINOSKOURIS, D

机构：

[1] Department of Chemical Engineering, National Technical University, GR-157 73, Athens

来源：

DRYING TECHNOLOGY | 1991年 / 9卷 / 03期

关键词：

CONFIDENCE REGIONS; CONVECTIVE MASS TRANSFER COEFFICIENT; DIFFUSION COEFFICIENT; FINITE ELEMENTS; PARAMETER ESTIMATION;

D O I：

10.1080/07373939108916707

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The kinetics of apricot dehydration was examined using a factorial experimental design in order to evaluate the effect of air temperature, air velocity and pretreatment of the sample on the drying time and the transport coefficients of apricots. A finite element method was used to solve the differential equations describing the transfer of moisture in the irregular shape of the apricot. The two transport coefficients of the system were estimated using non-linear regression analysis. It was found that the moisture transfer is entirely controlled by the external resistance to mass transfer for the air velocities examined. A new method is proposed for the evaluation of the relative significance of the external and the internal mass transfer during drying, which should replace the well known Biot number criterion.

引用

页码：735 / 752

页数：18

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