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Thermal-Hydraulic Studies on the Shell-and-Tube Heat Exchanger with Minijets

Author

Listed:
  • Jan Wajs

    (Department of Energy and Industrial Apparatus, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland)

  • Michał Bajor

    (Energa Invest Sp. z o.o., Grunwaldzka 472, 80-309 Gdansk, Poland)

  • Dariusz Mikielewicz

    (Department of Energy and Industrial Apparatus, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland)

Abstract

In this paper a patented design of a heat exchanger with minijets, with a cylindrical construction is presented. It is followed by the results of its systematic experimental investigations in the single-phase convection heat transfer mode. Based on these results, validation of selected correlations (coming from the literature) describing the Nusselt number was carried out. An assessment of the heat exchange intensification level in the described heat exchanger was done through the comparison with a shell-and-tube exchanger of a classical design. The thermal-hydraulic characteristics of both units were the subjects of comparison. They were constructed for the identical thermal conditions, i.e., volumetric flow rates of the working media and the media temperatures at the inlets to the heat exchanger. The experimental studies of both heat exchangers were conducted on the same test facility. An increase in the heat transfer coefficients values for the minijets heat exchanger was observed in comparison with the reference one, whereas the generated minijets caused greater hydraulic resistance. Experimentally confirmed intensification of heat transfer on the air side, makes the proposed minijets heat exchanger application more attractive, for the waste heat utilization systems from gas sources.

Suggested Citation

  • Jan Wajs & Michał Bajor & Dariusz Mikielewicz, 2019. "Thermal-Hydraulic Studies on the Shell-and-Tube Heat Exchanger with Minijets," Energies, MDPI, vol. 12(17), pages 1-12, August.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:17:p:3276-:d:261059
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    References listed on IDEAS

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    2. Chauhan, Ranchan & Singh, Tej & Thakur, N.S. & Kumar, Nitin & Kumar, Raj & Kumar, Anil, 2018. "Heat transfer augmentation in solar thermal collectors using impinging air jets: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 82(P3), pages 3179-3190.
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    4. Krzysztof Kosowski & Karol Tucki & Marian Piwowarski & Robert Stępień & Olga Orynycz & Wojciech Włodarski, 2019. "Thermodynamic Cycle Concepts for High-Efficiency Power Plants. Part B: Prosumer and Distributed Power Industry," Sustainability, MDPI, vol. 11(9), pages 1-13, May.
    5. Wajs, Jan & Mikielewicz, Dariusz & Jakubowska, Blanka, 2018. "Performance of the domestic micro ORC equipped with the shell-and-tube condenser with minichannels," Energy, Elsevier, vol. 157(C), pages 853-861.
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    Cited by:

    1. Magdalena Piasecka & Beata Maciejewska & Paweł Łabędzki, 2020. "Heat Transfer Coefficient Determination during FC-72 Flow in a Minichannel Heat Sink Using the Trefftz Functions and ADINA Software," Energies, MDPI, vol. 13(24), pages 1-25, December.
    2. Natalia Rydalina & Elena Antonova & Irina Akhmetova & Svetlana Ilyashenko & Olga Afanaseva & Vincenzo Bianco & Alexander Fedyukhin, 2020. "Analysis of the Efficiency of Using Heat Exchangers with Porous Inserts in Heat and Gas Supply Systems," Energies, MDPI, vol. 13(22), pages 1-13, November.
    3. Xiuli Liu & Hua Chen & Xiaolin Wang & Gholamreza Kefayati, 2020. "Study on Surface Condensate Water Removal and Heat Transfer Performance of a Minichannel Heat Exchanger," Energies, MDPI, vol. 13(5), pages 1-17, March.

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