Influence of fin arrangement on fluid flow and heat transfer in the inlet of a plate-fin heat exchanger

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• 作者：Jing-cheng Liu (1)
  Shu-you Zhang (1)
  Xin-yue Zhao (1)
  Guo-dong Yi (1)
  Zhi-yong Zhou (2)
  
  1. State Key Laboratory of Fluid Power Transmission and Control ; Zhejiang University ; Hangzhou ; 310027 ; China
  2. Design Institute of National Technology Research Center ; Hangzhou Hangyang Co. ; Ltd. ; Hangzhou ; 310004 ; China
  
• 关键词：Fin arrangement ; Plate ; fin heat exchanger ; Heat transfer ; Turbulence ; Temperature equalization ; TB657 ; 缈呯墖鎺掑垪 ; 鏉跨繀鎹㈢儹鍣?/li> 浼犵儹 ; 婀嶆祦 ; 娓╁害鍧囪　
• 刊名：Journal of Zhejiang University - Science A
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：16
• 期：4
• 页码：279-294
• 全文大小：1,673 KB
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• 刊物类别：Engineering
• 刊物主题：Physics
  Mechanics, Fluids and Thermodynamics
  Chinese Library of Science
  
• 出版者：Zhejiang University Press, co-published with Springer
• ISSN：1862-1775

文摘

Fin arrangement, which can cause temperature to be distributed non-uniformly and decrease heat exchange efficiency, can also affect fluid flow and distribution in different channels of a plate-fin heat exchanger. To reduce fluid maldistribution, the fluid flow and distribution should be investigated systematically. However, there is as yet no research reported on the fin arrangement effect. We investigated fluid flow and heat transfer at the inlet of a plate-fin heat exchanger by numerical calculation combined with simulation analysis. We simulated the fluid flow under seven kinds of fin arrangement, and analyzed the effects. The distribution of fluid parameters in four monitor positions among three sections was examined when the inlet flow velocity was 1 m/s with an inlet structure arranged with different numbers of fins. Denser fin arrangements among inlet, diversion, and heat exchange sections all intensify the turbulence at the outlet. With increase of arrangement density, the fluid flow direction will be changed and the fluid distribution inside the exchanger will be intensified to equalize the fluid temperature in different channels of the same layer. Furthermore, the effects of 18 combinations of fins in different sections on fluid flow were studied. Fin arrangements in different sections have more significant effect on turbulence than flow velocity and pressure; in comparison with the inlet and heat exchange sections, the diversion section has a significant effect on turbulence at the outlet of the heat exchanger.