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Effect of Secondary Vortex Flow Near Contact Point on Thermal Performance in the Plate Heat Exchanger with Different Corrugation Profiles

Author

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  • Hyung Ju Lee

    (School of Mechanical Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea)

  • Seong Hyuk Lee

    (School of Mechanical Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea)

Abstract

The present study numerically investigates thermal performance and turbulent flow characteristics of chevron-type plate heat exchangers with sinusoidal, trapezoidal, triangular, and elliptical corrugation profiles. The commercial code of ANSYS Fluent (v. 17.0) is used for computational fluid dynamics (CFD) simulation with the realizable k - ε model. In particular, we focus on the influence of configuration shape on a substantial change in flow direction near the contact point, yielding local vorticity. As a result, secondary vortical motions are observed in the flow passage with vorticity that is distributed locally and which changes near the contact point. Higher flow mixing generated and distributed by the secondary vortical motions contributes to the increase of the Colburn j -factor as well as the friction factor. The highest Colburn j -factor and friction factor are obtained for an elliptical profile, compared to other shapes, because of the increase in the vortex strength near the contact point.

Suggested Citation

  • Hyung Ju Lee & Seong Hyuk Lee, 2020. "Effect of Secondary Vortex Flow Near Contact Point on Thermal Performance in the Plate Heat Exchanger with Different Corrugation Profiles," Energies, MDPI, vol. 13(6), pages 1-13, March.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:6:p:1328-:d:331755
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    References listed on IDEAS

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    1. Abou Elmaaty, Talal M. & Kabeel, A.E. & Mahgoub, M., 2017. "Corrugated plate heat exchanger review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 70(C), pages 852-860.
    2. Hyung Ju Lee & Jaiyoung Ryu & Seong Hyuk Lee, 2019. "Influence of Perforated Fin on Flow Characteristics and Thermal Performance in Spiral Finned-Tube Heat Exchanger," Energies, MDPI, vol. 12(3), pages 1-13, February.
    3. Arkadiusz Brenk & Pawel Pluszka & Ziemowit Malecha, 2018. "Numerical Study of Flow Maldistribution in Multi-Plate Heat Exchangers Based on Robust 2D Model," Energies, MDPI, vol. 11(11), pages 1-17, November.
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