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CFD and PIV Investigation of a Liquid Flow Maldistribution across a Tube Bundle in the Shell-and-Tube Heat Exchanger with Segmental Baffles

Author

Listed:
  • Grzegorz Ligus

    (Faculty of Mechanical Engineering, Opole University of Technology, 45-758 Opole, Poland)

  • Marek Wasilewski

    (Faculty of Production Engineering and Logistics, Opole University of Technology, 45-758 Opole, Poland)

  • Szymon Kołodziej

    (Faculty of Mechanical Engineering, Opole University of Technology, 45-758 Opole, Poland)

  • Daniel Zając

    (Engineering and R&D Department, Kelvion Sp. z o. o., 45-641 Opole, Poland)

Abstract

The paper presents the results of research on liquid flow maldistribution in the shell side of a shell-and-tube heat exchanger (STHE). This phenomenon constitutes the reason for the formation of the velocity reduction area and adversely affects heat transfer and pressure drop. In order to provide details of the liquid distribution in STHE, two visualization methods were utilized. First, computational fluid dynamics (CFD) code coupled with the k-ε model and the laser-based particle image velocimetry (PIV) technique was applied. The tests were carried out for a bundle comprising 37 tubes in an in-line layout with a pitch d z /t = 1.5, placed in a shell with D in = 0.1 m. The STHE liquid feed rates corresponded to Reynolds numbers Re in equal to 16,662, 24,993, and 33,324. The analysis demonstrated that the flow maldistribution in the investigated geometry originates the result of three main streams in the cross-section of the shell side: central stream, oblique stream, and bypass stream. For central and oblique streams, the largest velocity reduction areas were formed in the wake of the tubes. On the basis of the flow visualization, it was also shown that the in-line layout of the tube bundle helps to boost the wake region between successive tubes in a row. Additionally, unfavorable vortex phenomena between the last row of tubes and the lower part of the exchanger shell were identified in the investigations. The conducted studies confirmed the feasibility of both methods in the identification and assessment of fluid flow irregularities in STHE. The maximum error of the CFD method in comparison to the experimental methods did not exceed 7% in terms of the pressure drops and 11% in the range of the maximum velocities.

Suggested Citation

  • Grzegorz Ligus & Marek Wasilewski & Szymon Kołodziej & Daniel Zając, 2020. "CFD and PIV Investigation of a Liquid Flow Maldistribution across a Tube Bundle in the Shell-and-Tube Heat Exchanger with Segmental Baffles," Energies, MDPI, vol. 13(19), pages 1-23, October.
  • Handle: RePEc:gam:jeners:v:13:y:2020:i:19:p:5150-:d:423142
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    References listed on IDEAS

    as
    1. Yue Sun & Xinting Wang & Rui Long & Fang Yuan & Kun Yang, 2019. "Numerical Investigation and Optimization on Shell Side Performance of A Shell and Tube Heat Exchanger with Inclined Trefoil-Hole Baffles," Energies, MDPI, vol. 12(21), pages 1-23, October.
    2. Emmanuel Mbondo Binyet & Jen-Yuan Chang & Chih-Yung Huang, 2020. "Flexible Plate in the Wake of a Square Cylinder for Piezoelectric Energy Harvesting—Parametric Study Using Fluid–Structure Interaction Modeling," Energies, MDPI, vol. 13(10), pages 1-29, May.
    3. Dong Liu & Ying-Ze Wang & Wei-Dong Shi & Hyoung-Bum Kim & Ai-Kun Tang, 2015. "Slit Wall and Heat Transfer Effect on the Taylor Vortex Flow," Energies, MDPI, vol. 8(3), pages 1-17, March.
    4. Takatoshi Matsubara & Yoshiki Shima & Hikaru Aono & Hitoshi Ishikawa & Takehiko Segawa, 2020. "Effects of Jet Induced by String-type Plasma Actuator on Flow Around Three-Dimensional Bluff Body and Drag Force," Energies, MDPI, vol. 13(4), pages 1-20, February.
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    Cited by:

    1. Maciej Masiukiewicz & Stanisław Anweiler, 2021. "Precise Evaluation of Gas–Liquid Two-Phase Flow Pattern in a Narrow Rectangular Channel with Stereology Method," Energies, MDPI, vol. 14(11), pages 1-16, May.
    2. Waldemar Fedak & Roman Ulbrich & Grzegorz Ligus & Marek Wasilewski & Szymon Kołodziej & Barbara Wasilewska & Marek Ochowiak & Sylwia Włodarczak & Andżelika Krupińska & Ivan Pavlenko, 2021. "Influence of Spray Nozzle Operating Parameters on the Fogging Process Implemented to Prevent the Spread of SARS-CoV-2 Virus," Energies, MDPI, vol. 14(14), pages 1-19, July.

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