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Investigation on Flow Maldistribution and Thermo-Hydraulic Performance of PCHEs with Spoiler Perforated Boards

Author

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  • Wei Wang

    (School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
    School of Environment, Harbin Institute of Technology, Harbin 150001, China
    State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China)

  • Mengke Niu

    (School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

  • Yufei Tan

    (School of Environment, Harbin Institute of Technology, Harbin 150001, China)

  • Bingxi Li

    (School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

  • Yong Shuai

    (School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

Abstract

In this study, the effects of the maldistribution coefficient on the thermo-hydraulic performance of discontinuous fin printed circuit heat exchanger (DF-PCHE) entrance head and channels are numerically investigated. To improve the flow uniformity at the entrance head, the flow in the exchanger with three types of spoiler perforated boards (SPBs) having 3 × 3, 4 × 4, and 5 × 5 holes and three kinds of hole diameters ( Φ d = 30, 25, and 20 mm), respectively, are compared to the flow in an exchanger with no SPB. The results show that a small maldistribution coefficient for the inlet velocity field is beneficial for the thermo-hydraulic performance of the DF-PCHE channels, and a maldistribution coefficient of 0.7 is an acceptable velocity distribution for the PCHE channel inlet. Using the 3 × 3 SPB with Φ d = 30 mm, the maldistribution coefficient becomes 0.7, the fastest among all the SPB application cases at Δ L = 150 mm. Moreover, its heat transfer coefficient and pressure drop increase by 22.46% and decreases by 47.2% compared to those of the exchanger without SPB, respectively.

Suggested Citation

  • Wei Wang & Mengke Niu & Yufei Tan & Bingxi Li & Yong Shuai, 2022. "Investigation on Flow Maldistribution and Thermo-Hydraulic Performance of PCHEs with Spoiler Perforated Boards," Energies, MDPI, vol. 15(18), pages 1-15, September.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:18:p:6518-:d:908514
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    References listed on IDEAS

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    1. Chen, Jingjing & Hai, Zhong & Lu, Xiaohua & Wang, Changsong & Ji, Xiaoyan, 2020. "Heat-transfer enhancement for corn straw slurry from biogas plants by twisted hexagonal tubes," Applied Energy, Elsevier, vol. 262(C).
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