Journal of South China University of Technology(Natural Science) >

2023 , Vol. 51 >Issue 3: 13 - 21

DOI: https://doi.org/10.12141/j.issn.1000-565X.220389

Energy, Power & Electrical Engineering

Performance Analysis of Integrated Micro-Channel Heat Exchanger

  • GAN Yunhua ,
  • LIU Runxi ,
  • YUAN Hui ,
  • LIU Fengming ,
  • LI Yong
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  • 1.School of Electric Power Engineering，South China University of Technology，Guangzhou 510640，Guangdong，China
    2.Guangxi Free Trade Zone Jianju Technology Co. ，Ltd. ，Qinzhou 535000，Guangxi，China
    3.School of Mechanical and Automotive Engineering，South China University of Technology，Guangzhou 510640，Guangdong，China
甘云华（1979-），男，教授，博士生导师，主要从事微通道传热等研究。

Received date: 2022-06-20

  Online published: 2022-09-14

Supported by

Guangdong Basic and Applied Basic Research Foundation(2020B1515020040);the Project of Central Guidance and Local Science and Technology Development Fund(Guike ZY22096022)

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Abstract

In order to improve the performance of the integrated micro-channel heat exchanger, this study established the steady-state heat transfer model of an integrated micro-channel heat exchanger, and studied the influence law of the structural parameters and operation parameters on it. The integrated micro-channel heat exchanger used R245fa as working medium. It studied the effects of heat exchanger and heat exchanger heat pipe spacing on the total thermal resistance and air-side pressure drop of the system by using the model, which was verified by experiments previously. The results show that when the evaporation section air volume of the integrated micro-channel heat exchanger is 0.41 m3/s, condensing section air volume is 0.21 m3/s and the total thermal resistance of the heat exchanger system is 0.038 0 m2·K/W. With the increase of circulating air volume in the condensing section and the evaporation section, the air-side pressure drop of the micro-channel heat exchanger increases, and the total thermal resistance decreases. The downtrend of the total thermal resistance of the micro-channel heat exchanger decreases gradually with the increase of air volume. In scope of this research, it is concluded that the appropriate air volume in the evaporation section is 0.45 m3/s, and that in the condensation section is 0.69 m3/s. With the increase of the integrated micro-channel heat exchanger heat pipe spacing, the total thermal resistance of the micro-channel heat exchanger increases, and the air-side pressure drop of the micro-channel heat exchanger decreases in the evaporation section. When the heat exchanger heat pipe spacing is 6 mm, the comprehensive performance of the integrated micro-channel heat exchanger is the best. The research results provide a reference for the design of cooling equipment for communication base stations and the optimization of the structure and control parameters of the micro-channel heat exchanger.

Key words： micro-channel heat pipe; heat exchanger; heat transfer; pressure drop

Cite this article

GAN Yunhua , LIU Runxi , YUAN Hui , LIU Fengming , LI Yong . Performance Analysis of Integrated Micro-Channel Heat Exchanger[J]. Journal of South China University of Technology(Natural Science), 2023 , 51(3) : 13 -21 . DOI: 10.12141/j.issn.1000-565X.220389

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