NUMERICAL STUDY ON HYGROSCOPIC MATERIAL DRYING IN PACKED BED

被引:4
|
作者
Stakic, M. [1 ]
Banjac, M. [2 ]
Urosevic, T. [3 ]
机构
[1] Univ Belgrade, Inst Nucl Sci Vinca, Belgrade 11001, Serbia
[2] Univ Belgrade, Fac Mech Engn, Belgrade 11001, Serbia
[3] Univ Belgrade, Fac Agr, Belgrade 11001, Serbia
关键词
Heat and mass transfer; Mathematical model; Simulation; GRAIN DRYERS; SIMULATION; MODEL; POTATO; HEAT;
D O I
10.1590/S0104-66322011000200012
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The paper addresses numerical simulation for the case of convective drying of hygroscopic material in a packed bed, analyzing agreement between the simulated and the corresponding experimental results. In the simulation model of unsteady simultaneous one-dimensional heat and mass transfer between gas phase and dried material, it is assumed that the gas-solid interface is at thermodynamic equilibrium, while the drying rate of the specific product is calculated by applying the concept of a "drying coefficient". Model validation was clone on the basis of the experimental data obtained with potato cubes. The obtained drying kinetics, both experimental and numerical, show that higher gas (drying agent) velocities (flow-rates), as well as lower equivalent grain diameters, induce faster drying. This effect is more pronounced for deeper beds, because of the larger amount of wet material to be dried using the same drying agent capacity.
引用
收藏
页码:273 / 284
页数:12
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