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A MCDM Methodology to Determine the Most Critical Variables in the Pressure Drop and Heat Transfer in Minichannels

Author

Listed:
  • Eloy Hontoria

    (Department of Business Economics, Technical University of Cartagena, 30202 Cartagena-Murcia, Spain)

  • Alejandro López-Belchí

    (University Centre of Defence at the Spanish Air Force Academy, 30720 Santiago de la Ribera-Murcia, Spain)

  • Nolberto Munier

    (Technical University of Valencia, Ingenio, 46022 Valencia, Spain)

  • Francisco Vera-García

    (Department of Thermal Engineering and Fluids, Technical University of Cartagena, 30202 Cartagena-Murcia, Spain)

Abstract

This paper proposes a methodology aiming at determining the most influent working variables and geometrical parameters over the pressure drop and heat transfer during the condensation process of several refrigerant gases using heat exchangers with pipes mini channels technology. A multi-criteria decision making (MCDM) methodology was used; this MCDM includes a mathematical method called SIMUS (Sequential Interactive Modelling for Urban Systems) that was applied to the results of 2543 tests obtained by using a designed refrigeration rig in which five different refrigerants (R32, R134a, R290, R410A and R1234yf) and two different tube geometries were tested. This methodology allows us to reduce the computational cost compared to the use of neural networks or other model development systems. This research shows six variables out of 39 that better define simultaneously the minimum pressure drop, as well as the maximum heat transfer, saturation pressure fluid entering the condenser being the most important one. Another aim of this research was to highlight a new methodology based on operation research for their application to improve the heat transfer energy efficiency and reduce the CO 2 footprint derived of the use of heat exchangers with minichannels.

Suggested Citation

  • Eloy Hontoria & Alejandro López-Belchí & Nolberto Munier & Francisco Vera-García, 2021. "A MCDM Methodology to Determine the Most Critical Variables in the Pressure Drop and Heat Transfer in Minichannels," Energies, MDPI, vol. 14(8), pages 1-13, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:8:p:2069-:d:532448
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    References listed on IDEAS

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    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. Nolberto Munier & Eloy Hontoria & Fernando Jiménez-Sáez, 2019. "Strategic Approach in Multi-Criteria Decision Making," International Series in Operations Research and Management Science, Springer, number 978-3-030-02726-1, April.
    3. Svetla Stoilova & Nolberto Munier & Martin Kendra & Tomáš Skrúcaný, 2020. "Multi-Criteria Evaluation of Railway Network Performance in Countries of the TEN-T Orient–East Med Corridor," Sustainability, MDPI, vol. 12(4), pages 1-22, February.
    4. Mirosław Grabowski & Sylwia Hożejowska & Beata Maciejewska & Krzysztof Płaczkowski & Mieczysław E. Poniewski, 2020. "Application of the 2-D Trefftz Method for Identification of Flow Boiling Heat Transfer Coefficient in a Rectangular MiniChannel," Energies, MDPI, vol. 13(15), pages 1-14, August.
    5. Shilin Li & Zhongchao Zhao & Yanrui Zhang & Haijia Xu & Weiqin Zeng, 2020. "Experimental and Numerical Analysis of Condensation Heat Transfer and Pressure Drop of Refrigerant R22 in Minichannels of a Printed Circuit Heat Exchanger," Energies, MDPI, vol. 13(24), pages 1-19, December.
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