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Heat Transfer Coefficient Identification in Mini-Channel Flow Boiling with the Hybrid Picard–Trefftz Method

Author

Listed:
  • Mirosław Grabowski

    (Faculty of Civil Engineering, Mechanics and Petrochemistry, Warsaw University of Technology, 09-400 Płock, Poland)

  • Sylwia Hożejowska

    (Faculty of Management and Computer Modelling, Kielce University of Technology, 25-314 Kielce, Poland)

  • Anna Pawińska

    (Faculty of Management and Computer Modelling, Kielce University of Technology, 25-314 Kielce, Poland)

  • Mieczysław E. Poniewski

    (Faculty of Civil Engineering, Mechanics and Petrochemistry, Warsaw University of Technology, 09-400 Płock, Poland)

  • Jacek Wernik

    (Faculty of Civil Engineering, Mechanics and Petrochemistry, Warsaw University of Technology, 09-400 Płock, Poland)

Abstract

This paper summarizes the results of the flow boiling heat transfer study with ethanol in a 1.8 mm deep and 2.0 mm wide horizontal, asymmetrically heated, rectangular mini-channel. The test section with the mini-channel was the main part of the experimental stand. One side of the mini-channel was closed with a transparent sight window allowing for the observation of two-phase flow structures with the use of a fast film camera. The other side of the channel was the foil insulated heater. The infrared camera recorded the 2D temperature distribution of the foil. The 2D temperature distributions in the elements of the test section with two-phase flow boiling were determined using (1) the Trefftz method and (2) the hybrid Picard–Trefftz method. These methods solved the triple inverse heat conduction problem in three consecutive elements of the test section, each with different physical properties. The values of the local heat transfer coefficients calculated on the basis of the Robin boundary condition were compared with the coefficients determined with the simplified approach, where the arrangement of elements in the test section was treated as a system of planar layers.

Suggested Citation

  • Mirosław Grabowski & Sylwia Hożejowska & Anna Pawińska & Mieczysław E. Poniewski & Jacek Wernik, 2018. "Heat Transfer Coefficient Identification in Mini-Channel Flow Boiling with the Hybrid Picard–Trefftz Method," Energies, MDPI, vol. 11(8), pages 1-13, August.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:8:p:2057-:d:162583
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    Citations

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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. Magdalena Piasecka & Sylwia Hożejowska & Anna Pawińska & Dariusz Strąk, 2022. "Heat Transfer Analysis of a Co-Current Heat Exchanger with Two Rectangular Mini-Channels," Energies, MDPI, vol. 15(4), pages 1-19, February.
    3. Sylwia Hożejowska & Magdalena Piasecka, 2020. "Numerical Solution of Axisymmetric Inverse Heat Conduction Problem by the Trefftz Method," Energies, MDPI, vol. 13(3), pages 1-14, February.
    4. Piotr Duda & Mariusz Konieczny, 2020. "Experimental Verification of the Inverse Method of the Heat Transfer Coefficient Calculation," Energies, MDPI, vol. 13(6), pages 1-16, March.
    5. Krzysztof Płaczkowski & Mirosław Grabowski & Mieczysław E. Poniewski, 2021. "Novel Twofold Use of Photographic Technique for Simultaneous Flow Boiling Image Recording and Void Fraction Computation in a Mini-Channel Experiment," Energies, MDPI, vol. 14(15), pages 1-21, July.
    6. Magdalena Piasecka & Sylwia Hożejowska & Beata Maciejewska & Anna Pawińska, 2021. "Time-Dependent Heat Transfer Calculations with Trefftz and Picard Methods for Flow Boiling in a Mini-Channel Heat Sink," Energies, MDPI, vol. 14(7), pages 1-24, March.

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