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Regression Model of Dynamic Pulse Instabilities during Condensation of Zeotropic and Azeotropic Refrigerant Mixtures R404A, R448A and R507A in Minichannels

Author

Listed:
  • Waldemar Kuczyński

    (Department of Energy, Faculty of Mechanical Engineering, Technical University of Koszalin, Ul. Racławicka 15-17, 75-620 Koszalin, Poland)

  • Marcin Kruzel

    (Department of Energy, Faculty of Mechanical Engineering, Technical University of Koszalin, Ul. Racławicka 15-17, 75-620 Koszalin, Poland)

  • Katarzyna Chliszcz

    (Department of Energy, Faculty of Mechanical Engineering, Technical University of Koszalin, Ul. Racławicka 15-17, 75-620 Koszalin, Poland)

Abstract

This paper presents experimental research and mathematical modeling data concerning the impact of unit dynamic instabilities on the phase-transition condensation processes of the zeotropic mixtures R404A and R448A and azeotropic R507A refrigerants in pipe minichannels. The R507 refrigerant is currently used as a temporary substitute for R404A, whereas R448A is a sustainable prospective substitute for R404A. The study presents experimental testing data for the condensation processes of these refrigerants in pipe minichannels and a proposal for the use of dimensional analysis, including the Π-Buckingham theorem, to determine the regression relationship explaining the propagation of unit dynamic instabilities. Based on the experimental studies performed, regression computational models were developed and showed satisfactory agreement in the range of 20% to 25%. They give the possibility to identify, in a utilitarian, way the speed of propagation of temperature and pressure instabilities during the liquefaction of refrigerants. The study was carried out on pipe minichannels with an internal diameter of di = 3.3, 2.3, 1.92, 1.44 and 1.40 mm.

Suggested Citation

  • Waldemar Kuczyński & Marcin Kruzel & Katarzyna Chliszcz, 2022. "Regression Model of Dynamic Pulse Instabilities during Condensation of Zeotropic and Azeotropic Refrigerant Mixtures R404A, R448A and R507A in Minichannels," Energies, MDPI, vol. 15(5), pages 1-24, February.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:5:p:1789-:d:760793
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    References listed on IDEAS

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    1. Yuanhua Lin & Xiangwei Kong & Yijie Qiu & Qiji Yuan, 2013. "Calculation Analysis of Pressure Wave Velocity in Gas and Drilling Mud Two-Phase Fluid in Annulus during Drilling Operations," Mathematical Problems in Engineering, Hindawi, vol. 2013, pages 1-17, September.
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    Cited by:

    1. Andrii Radchenko & Mykola Radchenko & Hanna Koshlak & Roman Radchenko & Serhiy Forduy, 2022. "Enhancing the Efficiency of Integrated Energy Systems by the Redistribution of Heat Based on Monitoring Data," Energies, MDPI, vol. 15(22), pages 1-18, November.
    2. Waldemar Kuczyński & Marcin Kruzel & Katarzyna Chliszcz, 2022. "A Regressive Model for Periodic Dynamic Instabilities during Condensation of R1234yf and R1234ze Refrigerants," Energies, MDPI, vol. 15(6), pages 1-14, March.
    3. Mykola Radchenko & Andrii Radchenko & Eugeniy Trushliakov & Hanna Koshlak & Roman Radchenko, 2023. "Advanced Method of Variable Refrigerant Flow (VRF) Systems Designing to Forecast Onsite Operation—Part 2: Phenomenological Simulation to Recoup Refrigeration Energy," Energies, MDPI, vol. 16(4), pages 1-17, February.
    4. Mykola Radchenko & Andrii Radchenko & Eugeniy Trushliakov & Anatoliy Pavlenko & Roman Radchenko, 2023. "Advanced Method of Variable Refrigerant Flow (VRF) System Design to Forecast on Site Operation—Part 3: Optimal Solutions to Minimize Sizes," Energies, MDPI, vol. 16(5), pages 1-18, March.

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