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Effect of Channel Shape on Heat Transfer and Mechanical Properties of Supercritical CO 2 Microchannel Heat Exchanger

Author

Listed:
  • Peiyue Li

    (Luoyang Ship Material Research Institute (LSMRI), Luoyang 471000, China)

  • Wen Fu

    (Luoyang Ship Material Research Institute (LSMRI), Luoyang 471000, China)

  • Kaidi Zhang

    (State Key Laboratory of Maritime Technology and Safety, Wuhan University of Technology, Wuhan 430063, China)

  • Qiulong Li

    (Luoyang Ship Material Research Institute (LSMRI), Luoyang 471000, China)

  • Yi Zhang

    (Luoyang Ship Material Research Institute (LSMRI), Luoyang 471000, China)

  • Yanmo Li

    (Luoyang Ship Material Research Institute (LSMRI), Luoyang 471000, China)

  • Zhihua Wang

    (Luoyang Ship Material Research Institute (LSMRI), Luoyang 471000, China)

  • Xiuhua Hou

    (Luoyang Ship Material Research Institute (LSMRI), Luoyang 471000, China)

  • Yuwei Sun

    (State Key Laboratory of Maritime Technology and Safety, Wuhan University of Technology, Wuhan 430063, China)

  • Wei Wei

    (State Key Laboratory of Maritime Technology and Safety, Wuhan University of Technology, Wuhan 430063, China)

Abstract

The heat exchanger plays a key role in the S-CO 2 power cycle of power generation systems based on waste heat and has a large impact on their cost control and compactness. In this paper, we take the channel shape of a microchannel heat exchanger as the research object and combine orthogonal tests and numerical simulation, taking the microchannel cross-section length/short-axis ratio, volume ratio and filling rate as independent variables, to numerically study multi-channel thermal–fluid–solid coupling and explore the effects of different microchannel cross-section length/short-axis ratios, volume ratios and filling rates on the thermal hydraulic and mechanical properties of the heat exchanger. The results show that a change in the channel volume ratio has a greater impact on the thermal hydraulic performance of the heat exchanger and that its heat transfer performance is only marginally affected by a change in the channel filling rate. Additionally, when other geometric parameters are kept to a certain level, the closer the shape of the channel is to a circle, the better its mechanical properties are. Within the range of permissible designs, a change in the channel volume ratio does not have an obvious impact on the mechanical properties of the microchannels, while the channel filling rate has the most significant impact. The most significant effect of the channel filling rate on the mechanical properties occurs through the channel volume ratio.

Suggested Citation

  • Peiyue Li & Wen Fu & Kaidi Zhang & Qiulong Li & Yi Zhang & Yanmo Li & Zhihua Wang & Xiuhua Hou & Yuwei Sun & Wei Wei, 2024. "Effect of Channel Shape on Heat Transfer and Mechanical Properties of Supercritical CO 2 Microchannel Heat Exchanger," Energies, MDPI, vol. 17(15), pages 1-17, July.
  • Handle: RePEc:gam:jeners:v:17:y:2024:i:15:p:3774-:d:1446993
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    References listed on IDEAS

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    1. Kim, Min Seok & Ahn, Yoonhan & Kim, Beomjoo & Lee, Jeong Ik, 2016. "Study on the supercritical CO2 power cycles for landfill gas firing gas turbine bottoming cycle," Energy, Elsevier, vol. 111(C), pages 893-909.
    2. Liu, Bohan & Lu, Mingjian & Shui, Bo & Sun, Yuwei & Wei, Wei, 2022. "Thermal-hydraulic performance analysis of printed circuit heat exchanger precooler in the Brayton cycle for supercritical CO2 waste heat recovery," Applied Energy, Elsevier, vol. 305(C).
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    Cited by:

    1. Yifan Li & Tianyu Wang & Zhipeng Wang & Congzhe Zhu & Junlan Yang & Bin Yang, 2024. "Thermal–Hydraulic Performance Analysis of Combined Heat Sink with Open Microchannels and Embedded Pin Fins," Energies, MDPI, vol. 17(21), pages 1-18, October.

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