DESIGN AND TESTING OF A COMBINED CONDUCTION-CONVECTION ROTARY PADDY DRYER
作者:
M.J.C. REGALADO,
PS. MADAMBA,
期刊:
Drying Technology
(Taylor Available online 2000)
卷期:
Volume 18,
issue 9
页码: 1987-2008
ISSN:0737-3937
年代: 2000
DOI:10.1080/07373930008917823
出版商: Taylor & Francis Group
关键词: rotary dryer;paddy;partial drying;conduction heating;convection drying
数据来源: Taylor
摘要:
A rotary drum dryer prototype was designed, fabricated and tested to combine convection drying with conduction heating of paddy to increase moisture reduction rates. Ambient air forced inside the drum counter-flow to the direction of the cascading grains brought about “dryeration” of the hot grains, resulting in cooler grain output and increased moisture reduction rates. Its partial drying capacity doubled that of the benchmark pre-dryer at 5 rpm drum speed and quadrupled at 7 rpm, requiring only a single-pass operation. Tests using freshly harvested and re-wetted paddy showed that partial drying capacity, final moisture content and moisture reduction rate were all significantly affected by counter-flow air velocity, Its overall thermal efficiency was also 50% higher.
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