Drop-in replacement in a R134 ejector refrigeration cycle by HFO refrigerants

•Numerical analysis of a supersonic single-phase ejector.•Thermodynamical study of a Heat Driven Ejector Refrigeration cycle.•Performance evaluation of three refrigerants including two HFOs.•Low-GWP R134a alternatives for drop-in replacement. The present work reports a numerical analysis of a single...

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Bibliographic Details
Published in:International journal of refrigeration Vol. 77; pp. 87 - 98
Main Authors: Fang, Yu, Croquer, Sergio, Poncet, Sébastien, Aidoun, Zine, Bartosiewicz, Yann
Format: Journal Article
Language:English
Published: Paris Elsevier Ltd 01.05.2017
Elsevier Science Ltd
Subjects:
Cooling
Cycle frigorifique
Ejection
Entrainment
Fluides frigorigènes HFO
HFO refrigerants
Modélisation numérique
Modélisation thermodynamique
Numerical analysis
Numerical modeling
Pressure ratio
R134a
Refrigerants
Refrigeration
Refrigeration cycle
Single-phase ejector
Thermodynamic modeling
Thermodynamic properties
Thermodynamics
Éjecteur monophasique
HFO refrigerants
Numerical modeling
Refrigeration cycle
Cycle frigorifique
Modélisation thermodynamique
Fluides frigorigènes HFO
Éjecteur monophasique
Thermodynamic modeling
Modélisation numérique
R134a
Single-phase ejector
ISSN:0140-7007, 1879-2081
Online Access:Get full text
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Summary:•Numerical analysis of a supersonic single-phase ejector.•Thermodynamical study of a Heat Driven Ejector Refrigeration cycle.•Performance evaluation of three refrigerants including two HFOs.•Low-GWP R134a alternatives for drop-in replacement. The present work reports a numerical analysis of a single-phase supersonic ejector working with R134a as well as hydrofluoroolefin (HFO) refrigerants R1234yf and R1234ze(E). Comparisons were made regarding the ejector performances under varying operating conditions and refrigerant mixture proportions. The calculations have been then extended to an existing ejector heat driven refrigeration cycle (EHDRC). R1234yf appears to be a good candidate for drop-in replacement of R134a in a real EHDRC, while using R1234ze(E) would induce some modifications due to its thermodynamic properties. Maintaining the same pressure ratio for the ejector would lead on one hand to better entrainment ratio using R1234ze(E) and on the other hand to reduced coefficient of performance (COP) and cooling power by 4.2% and 26.6% in average, respectively. Using R1234yf under the same conditions induces a decrease of 5.2% for the entrainment ratio, 9.6% for the COP and 19.8% for the cooling power in average.
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ISSN:0140-7007
1879-2081
DOI:10.1016/j.ijrefrig.2017.02.028