• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 1989, Vol. 25 ›› Issue (1): 46-52.

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分流式换热器的性能比较

庄震万   

  1. 南京化工学院
  • 发布日期:1989-01-01

A COMPARISON OF THERMAL PERFORMANCE OF SPLIT FLOW HEAT EXCHANGERS

Zhuang Zhenwan   

  1. Nanjing Institute of Chemical Technolog
  • Published:1989-01-01

摘要： 基于对<1-3>、<2-4>及<2-6>型分流式换热器基本方程的解析解，给出了温度效果P和对数平均温差修正系数F的计算公式。在热容量比R及传热单元数NTU的实际有意义的范围内，比较了<1－n>及<2－n>型分流式换热器的P值。对结果作了有益的讨论。

关键词: 传热有效度, 对数平均温差修正系数, 分流式换热器, 温度效率, 表面粗糙度, 缓进给磨削, 立铣刀, 硬质合金, 螺旋槽

Abstract: Based upon analytical solutions of governing equations for heat transfer in <1-3>, <2-4>,and<2-6)split flow heat exchangers, the expressions for the temperature efficiency P and LMTD correction factor Fare presented. F and P values for<1-n>(n=2,3,4)and<2-n>(n=4,6,8)split flow heat exchangers are compared over the meaningful range of values of thermal flow rate ratio R and number of heat transfer units (NTU), The results are discussed.

Key words: 传热有效度, 对数平均温差修正系数, 分流式换热器, 温度效率, Cemented carbide, Creep feed grinding, End mill, Surfaces roughness, Helical flute

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