Computer simulation on intermittent drying of rough rice

被引:31
|
作者
Shei, HJ
Chen, YL
机构
[1] China Inst Technol, Dept Mech Engn, Taipei, Taiwan
[2] Natl Taiwan Univ, Dept Agr Machinery Engn, Taipei 10764, Taiwan
关键词
tempering; intermittent drying; rough rice; re-circulating rice dryer;
D O I
10.1081/DRT-120002820
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
This study applied a partial differential equation model with newly-developed thin layer equations to simulate batch re-circulating dryers under different drying conditions, which are combinations of four parameters: drying air temperature, drying air absolute humidity, drying period duration, and tempering period duration. The moisture change and the drying rate, which were of particular concern with respect to the simulated data, were investigated. Validation drying tests were carried out in a lab scale re-circulating rice dryer. Two sets of experiment were performed involving different drying parameters to simulate re-circulating rice dryers which are extensively used in Asian countries. Comparing these two experimental data with two simulated drying curves respectively, it revealed they are quite consist with each other under the same drying conditions. Drying air temperature, drying air humidity, drying period duration and tempering period duration significantly influenced the drying rate. Under the same drying condition, the tempering period duration effect was insignificant to the drying rate in drying zone as the drying air humidity or temperature increased. And, a higher initial moisture content obtained higher time and energy efficiency for the re-circulating rice dryers.
引用
收藏
页码:615 / 636
页数:22
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