Chemical Industry and Engineering Progress ›› 2019, Vol. 38 ›› Issue (04): 1688-1695.DOI: 10.16085/j.issn.1000-6613.2018-1364

• Resources and environmental engineering • Previous Articles     Next Articles

Optimization on shell side structure of twisty flow heat exchanger based on orthogonal experiment

Xin GU1(),Zhiyang ZHENG1,Yuankun LUO1,Xiaochao XIONG1,Dabo ZHANG2()   

  1. 1. Key Laboratory of Process Heat Transfer and Energy Saving of Henan Province, Zhengzhou University, Zhengzhou 450002, Henan, China
    2. Zhengzhou Tobacco Research Institute of China National Tobacco Corp. ,Zhengzhou 450001, Henan, China
  • Received:2018-07-04 Revised:2018-09-21 Online:2019-04-05 Published:2019-04-05
  • Contact: Dabo ZHANG

基于正交试验的扭转流换热器壳程结构优化

古新1(),郑志阳1,罗元坤1,熊晓朝1,张大波2()   

  1. 1. 郑州大学河南省过程传热与节能重点实验室,河南 郑州 450002
    2. 中国烟草总公司郑州烟草研究院,河南 郑州 450001
  • 通讯作者: 张大波
  • 作者简介:古新(1978—),男,博士,副教授,研究方向为新型高效节能换热设备。E-mail:<email>guxin@zzu.edu.cn</email>。|张大波,硕士,高级工程师,研究方向为烟卷工艺。E-mail:<email>zhangdabo1979@126.com</email>。
  • 基金资助:
    国家自然科学基金(21776263,51006092);河南省科技攻关计划(182102310022);河南省高等学校重点科研项目应用研究计划(18A470001)

Abstract:

Periodic entire cross-section computation model of twisty flow shell-and-tube heat exchanger is established, and the reliability of numerical simulation method and its results is verified by contrast experiment. The major factors affecting the heat transfer and flow resistance performance on shell side fluid of twisty flow heat exchanger include the spacing between two adjacent groups of trapezoidal baffles, the width of baffles, the inclination angle of baffles and the number of per group of baffles. The various parameters influencing heat transfer coefficient, pressure drop and comprehensive performance on shell side fluid of twisty flow heat exchanger are studied by designing orthogonal experiment, and the structural parameters with significant effect are optimized. The results show that in the range of research parameters, the main and secondary order which influence the comprehensive performance on shell side fluid of twisty flow heat exchanger are that the spacing between two adjacent groups of trapezoidal baffles > the number of per group of baffles > the inclination angle of baffles > the width of baffles. The optimal structural parameters of combination considered comprehensive performance should be that the spacing between two adjacent groups of trapezoidal baffles is 100mm, the number of per group of baffles is 2,the inclination angle of baffles is 52.5° and the width of baffles is 100mm, then the comprehensive performance is 114.9. The results of the study provide a new method for multi-objective optimization of shell-side structural parameters of shell-and-tube heat exchanger which has certain guiding significance.

Key words: shell-and-tube heat exchanger, twisty flow, orthogonal experiment, numerical simulation, heat transfer enhancement

摘要:

建立扭转流管壳式换热器周期性全截面数值计算模型,采用对比实验验证了数值模拟方法及其结果的可靠性。影响扭转流换热器壳程流体换热和流阻性能的主要因素有相邻两组类梯形导流板间距、导流板宽度、导流板倾斜角度以及每组导流板的数量。设计正交试验,综合研究各参数对扭转流换热器壳程流体传热系数、压降及综合性能的影响,并对影响显著的结构参数进行了优化。结果表明,在研究参数范围内,影响扭转流换热器壳程流体综合性能的主次顺序为:相邻两组导流板间距>每组导流板数量>导流板倾斜角度>导流板宽度。综合性能最优的结构参数组合是相邻两组导流板间距为100mm、每组导流板个数为2、导流板倾斜角度为52.5°、导流板宽度为100mm,综合性能最高为114.9。研究结果为管壳式换热器壳程结构参数进行多目标优化提供了一种新方法,具有一定的指导意义。

关键词: 管壳式换热器, 扭转流, 正交试验, 数值模拟, 传热强化

CLC Number: 

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