华南理工大学学报(自然科学版) ›› 2015, Vol. 43 ›› Issue (8): 9-14,48.doi: 10.3969/j.issn.1000-565X.2015.08.002

• 动力与电气工程 • 上一篇    下一篇

工艺条件下(1 + n)多股流一维传热组织原则优化

许雄文1,2 刘金平1,2 吴秋丽1   

  1. 1. 华南理工大学 电力学院,广东 广州 510640; 2. 华南理工大学 广东省能源高效清洁利用重点实验室,广东 广州 510640
  • 收稿日期:2014-08-06 修回日期:2015-03-25 出版日期:2015-08-25 发布日期:2015-07-01
  • 通信作者: 许雄文(1983-),男,助理研究员,主要从事制冷与传热研究. E-mail:epxwxu@scut.edu.cn
  • 作者简介:许雄文(1983-),男,助理研究员,主要从事制冷与传热研究.
  • 基金资助:
    中国博士后科学基金资助项目(2014M552195);国家自然科学基金资助项目(51206056);华南理工大学中央高
    校基本科研业务费专项资金资助项目(D215161w);华南理工大学广东省能源高效清洁利用重点实验室资助项目
    (2013A061401005)

Principles of Heat Transfer Organization Optimization for (1 + n) Multi-Stream One-Dimensional Heat Exchanger Meeting Process Requirements#br#

Xu Xiong-wen1,2  Liu Jin-ping1,2  Wu Qiu-li1   

  1. 1. School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China; 2. Guangdong Key Laboratory of Efficient and Clean Energy Utilization,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2014-08-06 Revised:2015-03-25 Online:2015-08-25 Published:2015-07-01
  • Contact: 许雄文(1983-),男,助理研究员,主要从事制冷与传热研究. E-mail:epxwxu@scut.edu.cn
  • About author:许雄文(1983-),男,助理研究员,主要从事制冷与传热研究.
  • Supported by:
    Supported by the China Postdoctoral Science Foundation(2014M552195) and the National Natural Science
    Foundation of China(51206056)

摘要: 在满足多股流换热工艺要求的前提下,分析了一股冷流与多股热流(或者一股热流与多股冷流换热)形成的(1 + n)多股流换热过程的最佳组织原则. 通过泛函数法,在给定火积耗散条件下求解所需最小换热面积. 结果表明:换热工艺条件下,换热过程中保持换热系数的开平方与换热温差的乘积均匀时,(1 + n)多股流换热过程最优,所需换热面积最小,而温差场均匀性原则并不是换热器设计的最佳原则.

关键词:  换热器, 温差, 优化

Abstract: On the premise of meeting the requirements of the multi-stream heat transfer process,the optimal orga-
nization principle of the heat transfer processamong (1 + n) multistreams,which comes from one cold stream and multi hot streams or from one hot stream and multi cold streams,is discussed in this paper. Then,a functional analysisis conducted to solve the required minimum heat exchange area under a given entranspy dissipation. The results show that,when the process requirements are met and the product of the heat transfer temperature difference and the square root of heat transfer coefficient is kept uniform,the heat transfer process among (1 + n) multi streams shows the best performance with aminimum heat exchange area,and that the principle of keeping the temperature difference (Δt) uniform is not the best.

Key words: heat transfer, temperature difference, optimization

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