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| A Heat Conduction Model of a Rectangular Ribbed Dryer |
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| DOI：10.11980/j.issn.0254-508X.2017.05.007 |
| Key Words:ribbed dryer heat conduction model heat transfer characteristics |
| Fund Project:本课题获得天津市应用基础研究计划面上项目(07JCYBJC01300)的支持。 |
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| Abstract:The heat transfer process of a rectangular ribbed dryer was investigated. Considering the different heat transfer coefficients on surfaces of the rib wall and bottom duct, a heat conduction model was presented based on definite difference method. With calculation results about a series of working conditions, the effect of geometry scale of the rib on the dryer heat transfer characteristics was analyzed. It was shown that a wider rib might increase the heat transfer rate of the dryer. Increment of rib height might result in a higher heat transfer rate of the dryer at smaller heat transfer coefficient on the rib surfaces, but a lower heat transfer rate of the dryer at higher heat transfer coefficient on the rib surfaces, it probably due to the decrease of convention heat resistance slower than the increase of heat conduction resistance on the rib surface. The rib efficiency and temperature uniformity of the outer surface of the dryer also had the similar characteristics. |
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