A compartmental model of thin-layer drying kinetics of rough rice

被引：28

作者：

Abud-Archila, M ^{[1
]}

Courtois, F ^{[1
]}

Bonazzi, C ^{[1
]}

Bimbenet, JJ ^{[1
]}

机构：

[1] INRA, ENSIA, Food Engn Proc Dept, F-91744 Massy, France

来源：

DRYING TECHNOLOGY | 2000年 / 18卷 / 07期

关键词：

rough rice; drying kinetics; compartmental model;

D O I：

10.1080/07373930008917784

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Rough rice at about 21% (wet basis) was dried sit various conditions of temperatures and evaporating capacities of air. The influence of both parameters on drying rate has been studied. At high temperatures, high drying rates can be achieved with low evaporating capacities. In addition, desorption isotherms of rough rice were measured at 35, 60 and 85 degrees C and the experimental isotherms data were fitted using a modified Pfost equation. A compartmental model was developed to simulate the grain moisture content. Heat and mass transfer coefficients were optimized using a Nelder & Mead method. Internal mass transfer coefficient was written as an exponential function of the average moisture content and temperature of the grain and the external mass transfer coefficient as a function of air temperature. The compartmental approach predicts very well the average moisture content with a mean error of about 5% in static and dynamic conditions.

引用

页码：1389 / 1414

页数：26