Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (2): 17-22.doi: 10.3969/j.issn.1000-565X.2010.02.004

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Local Heat Transfer Performance of Shell Side of Axial-Flow Shell-and-Tube Heat Exchanger with MPC

Zeng Wen-liang  Deng Xian-he  Li Zhi-wu   

  1. Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2009-03-20 Revised:2009-05-09 Online:2010-02-25 Published:2010-02-25
  • Contact: 曾文良（1969-），男，博士生，主要从事强化传热传质、过程节能和高效换热设备研究． E-mail:wlzeng@tom．com
  • About author:曾文良（1969-），男，博士生，主要从事强化传热传质、过程节能和高效换热设备研究．
  • Supported by:

    国家自然科学基金资助项目（20776046）

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Abstract:

In this paper, the local heat transfer performance of the shell side of an axial-flow shell-and-tube heat exchanger with multi-parallel-channel inlet/outlet （MPC） was experimentally studied, with or without distributed baffles being set in the inlet region at the shell side. The investigation includes such aspects as （ 1 ） the distribution of local surface Nusseh number （Nu） in the inlet region; （2） the correlation between the local-mean surface Nusseh number and the tube bundle location as well as the Reynolds number （Re） ; （3） the variations of mean Nusseh number and Reynolds number of the inlet region and the heat exchanger; （4） the distribution rule of the local surface Nusselt number of the inlet region at the shell side ; and （5） a reasonable mechanism analysis of the abovementioned statements. The results indicate that distributed baffles effectively improve the fluid flow distribution and enhance the overall heat transfer performance of the shell side of the heat exchange.

Key words: local heat transfer coefficient, axial-flow shell-and-tube heat exchanger, distributed baffle, multi-parallel-channel inlet/outlet