IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v15y2021i1p207-d713631.html
   My bibliography  Save this article

Testing of Heat Transfer Coefficients and Frictional Losses in Internally Ribbed Tubes and Verification of Results through CFD Modelling

Author

Listed:
  • Sławomir Grądziel

    (Department of Energy, Faculty of Environmental Engineering and Energy, Cracow University of Technology, Jana Pawła II 37, 31-864 Cracow, Poland)

  • Karol Majewski

    (Whirlpool Corporation, ul. Bora-Komorowskiego 6, 51-210 Wrocław, Poland)

  • Marek Majdak

    (Department of Energy, Faculty of Environmental Engineering and Energy, Cracow University of Technology, Jana Pawła II 37, 31-864 Cracow, Poland)

  • Łukasz Mika

    (Department of Thermal and Fluid Flow Machines, Faculty of Energy and Fuels, AGH University of Science and Technology, Mickiewicza 30, 30-059 Cracow, Poland)

  • Karol Sztekler

    (Department of Thermal and Fluid Flow Machines, Faculty of Energy and Fuels, AGH University of Science and Technology, Mickiewicza 30, 30-059 Cracow, Poland)

  • Rafał Kobyłecki

    (Department of Advanced Energy Technologies, Częstochowa University of Technology, Dąbrowskiego 69, 42-201 Częstochowa, Poland)

  • Robert Zarzycki

    (Department of Advanced Energy Technologies, Częstochowa University of Technology, Dąbrowskiego 69, 42-201 Częstochowa, Poland)

  • Małgorzata Pilawska

    (Department of Heat Processes, Air Protection and Waste Disposal, Faculty of Environmental Engineering and Energy, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland)

Abstract

This paper presents experimental determination of the heat transfer coefficient and the friction factor in an internally rifled tube. The experiment was carried out on a laboratory stand constructed in the Department of Energy of the Cracow University of Technology. The tested tube is used in a Polish power plant in a supercritical circulating fluidized bed (CFB) boiler with the power capacity of 460 MW. Local heat transfer coefficients were determined for Reynolds numbers included in the range from ~6000 to ~50,000, and for three levels of the heating element power. Using the obtained experimental data, a relation was developed that makes it possible to determine the dimensionless Chilton–Colburn factor. The friction factor was also determined as a function of the Reynolds number ranging from 20,000 to 90,000, and a new correlation was developed that represents the friction factor in internally ribbed tubes. The local heat transfer coefficient and the friction factor obtained during the testing were compared with the CFD modelling results. The modelling was performed using the Ansys Workbench application. The k-ω, the k-ε and the transition SST (Share Stress Transport) turbulence models were applied.

Suggested Citation

  • Sławomir Grądziel & Karol Majewski & Marek Majdak & Łukasz Mika & Karol Sztekler & Rafał Kobyłecki & Robert Zarzycki & Małgorzata Pilawska, 2021. "Testing of Heat Transfer Coefficients and Frictional Losses in Internally Ribbed Tubes and Verification of Results through CFD Modelling," Energies, MDPI, vol. 15(1), pages 1-17, December.
    • Handle: RePEc:gam:jeners:v:15:y:2021:i:1:p:207-:d:713631
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/15/1/207/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/15/1/207/
    Download Restriction: no
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Simone Ferrari & Riccardo Rossi & Annalisa Di Bernardino, 2022. "A Review of Laboratory and Numerical Techniques to Simulate Turbulent Flows," Energies, MDPI, vol. 15(20), pages 1-56, October.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:15:y:2021:i:1:p:207-:d:713631. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.