China Mechanical Engineering ›› 2021, Vol. 32 ›› Issue (13): 1630-1637.DOI: 10.3969/j.issn.1004-132X.2021.13.015

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Structural Design and Performance Analysis of New Micro Convex Fins in Plate-fin Heat Exchangers#br#

PENG Xiang1,2;LI Denghong1;LI Jiquan1;JIANG Shaofei1   

  1. 1.College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, 310023
    2.State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou, 310027
  • Online:2021-07-10 Published:2021-07-16

板翅式换热器中新型微凸翅片结构设计及性能分析

彭翔1,2;李登洪1;李吉泉1;姜少飞1   

  1. 1.浙江工业大学机械工程学院,杭州,310023
    2.浙江大学流体动力与机电系统国家重点实验室,杭州,310027
  • 通讯作者: 姜少飞(通信作者),男,1975年生,教授、博士研究生导师。研究方向为机械产品创新设计。E-mail:jsf75@zjut.edu.cn。
  • 作者简介:彭翔,男,1989年生,副研究员。研究方向为换热器设计、可靠性分析。E-mail: pengxiang@zjut.edu.cn。
  • 基金资助:
    国家重点研发计划(2017YFB0603704);
    国家自然科学基金(51875525,U1610112);
    浙江省自然科学基金(LY21E050008,LY19E050004,LY20E050020);
    流体动力与机电系统国家重点实验室开放课题(GZKF-201916)

Abstract: In order to improve heat transfer efficiency in fin regions and the overall heat transfer performance of plate-fin heat exchangers, a new micro convex fin structure was proposed. An approximate model was constructed based on the simulation results of thermodynamic performance at multiple sampling points of the structure parameters. With the total heat transfer rate as optimization objective and the pressure drop as the constraint, the optimum structure parameters (micro convex height, micro convex angle, micro convex opening length) of micro convex were determined by using sequential quadratic programming algorithm. And the arrangement spaces and arrangement type of micro convex were optimized to determine the specific parameters of improved micro convex fin structures. Through the temperature and pressure field analysis of fin channels, and the comparison of heat transfer performance with the same size of straight fin, the effectiveness of the new micro convex fin structure was verified.

Key words: plate-fin heat exchanger, micro convex fin, heat transfer performance, structural design

摘要: 为提高翅片区域的换热效率、改善板翅式换热器的整体换热性能,提出了一种新型微凸翅片结构。基于结构参数多采样点处的热力学性能仿真结果构建近似模型,以翅片热功率最高为优化目标、压降为约束,使用序列二次规划法确定了微凸体结构参数(微凸高度、微凸夹角、微凸开口长度)的最优值;对微凸体排列间距、排列方式进行优化,确定了改进微凸翅片结构的具体参数值。通过对翅片流道内温度场、压力场分析,以及与相同尺寸的平直翅片的换热性能对比,验证了所提出的新型微凸翅片结构的有效性。

关键词: 板翅式换热器, 微凸翅片, 换热性能, 结构设计

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