SIMULATION OF THE HEAT AND MOISTURE TRANSFER PROCESS DURING DRYING IN DEEP GRAIN BEDS |
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| Authors: | Da-Wen Sun J L Woods |
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| Affiliation: | 1. Department of Agricultural and Food Engineering , University College Dublin, National University of Ireland , Earlsfort Terrace, Dublin, 2, Ireland;2. Department of Agricultural and Environmental Science , University of Newcastle upon Tyne , Newcastle upon Tyne, NET 7RU, UK |
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| Abstract: | ABSTRACT Grain drying is a simultaneous heat and moisture transfer problem. The modelling of such a problem is of significance in understanding and controlling the drying process. In the present study, a mathematical model for coupled heat and moisture transfer problem is presented. The model consists of four partial differential equations for mass balance, heat balance, heat transfer and drying rate. A simple finite difference method is used to solve the equations. The method shows good flexibility in choosing time and space steps which enable the simulation of long term grain drying/cooling processes. A deep barley bed is used as an example of grain beds in the current simulation. The results are verified against experimental data taken from literature. The analysis of the effects of operating conditions on the temperature and moisture content within the bed is also carried out |
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| Keywords: | barley computer simulation grain storage heat and mass transfer mathematical model porous bed |
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