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Efficiency Evaluation of the Ejector Cooling Cycle using a New Generation of HFO/HCFO Refrigerant as a R134a Replacement

Author

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  • Bartosz Gil

    (Faculty of Mechanical and Power Engineering, Wroclaw University of Science and Technology, Wroclaw 50-370, Poland)

  • Jacek Kasperski

    (Faculty of Mechanical and Power Engineering, Wroclaw University of Science and Technology, Wroclaw 50-370, Poland)

Abstract

Theoretical investigations of the ejector refrigeration system using hydrofluoroolefins (HFOs) and hydrochlorofluoroolefin (HCFO) refrigerants are presented and discussed. A comparative study for eight olefins and R134a as the reference fluid was made on the basis of a one-dimensional model. To facilitate and extend the possibility of comparing our results, three different levels of evaporation and condensation temperature were adopted. The generator temperature for each refrigerant was changed in the range from 60 °C to the critical temperature for a given substance. The performed analysis shown that hydrofluoroolefins obtain a high efficiency of the ejector system at low primary vapor temperatures. For the three analyzed sets of evaporation and condensation temperatures ( t e and t c equal to 0 °C/25 °C, 6 °C/30 °C, and 9 °C/40 °C) the maximum Coefficient of Performance (COP) was 0.35, 0.365, and 0.22, respectively. The best performance was received for HFO-1243zf and HFO-1234ze(E). However, they do not allow operation in a wide range of generator temperatures, and, therefore, it is necessary to correctly select and control the operating parameters of the ejector.

Suggested Citation

  • Bartosz Gil & Jacek Kasperski, 2018. "Efficiency Evaluation of the Ejector Cooling Cycle using a New Generation of HFO/HCFO Refrigerant as a R134a Replacement," Energies, MDPI, vol. 11(8), pages 1-17, August.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:8:p:2136-:d:164077
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    References listed on IDEAS

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    4. Yilmaz, Tuncay & Erdinç, Mehmet Tahir, 2019. "Energetic and exergetic investigation of a novel refrigeration system utilizing ejector integrated subcooling using different refrigerants," Energy, Elsevier, vol. 168(C), pages 712-727.
    5. Bartosz Gil & Anna Szczepanowska & Sabina Rosiek, 2021. "New HFC/HFO Blends as Refrigerants for the Vapor-Compression Refrigeration System (VCRS)," Energies, MDPI, vol. 14(4), pages 1-23, February.

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