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Étude expérimentale du R1234yf comme alternative à faible potentiel de réchauffement planétaire au R134a dans un système frigorifique à compression de vapeur sans huile.

Experimental study of R1234yf as a low global warming potential alternative for R134a in an oil-free vapour compression refrigeration system.

Numéro : pap. n. 315

Auteurs : LI Z., LIANG K., JIANG H.

Résumé

As an alternative to the high global warming potential (GWP) hydrofluorocarbons (HFCs), R1234yf synthetic refrigerant from the family of the hydrofluoroolefins (HFOs), has emerged recently as a replacement fluid for R134a, particularly for motor air conditioners. This paper presents an experimental study using R1234yf as a drop-in replacement for R134a in an oil-free refrigeration system. The oil-free refrigeration system was instrumented using both R1234yf and R134a. The experiments were carried out for strokes from 9 mm to 13 mm, pressure ratio from 2.0 to 4.0 and condenser outlet temperatures from 40 °C to 50 °C. The experimental results show that the coefficient of performance (COP) of R1234yf is 12% lower than R134a with condenser temperature of 50 °C and evaporator temperature of 5 °C. Volumetric efficiency of R134a is 5% higher than R1234yf for given conditions. Results of mass flow rate, resonant frequency, and cooling capacity are also reported.

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Pages : 7

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    20 €

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Détails

  • Titre original : Experimental study of R1234yf as a low global warming potential alternative for R134a in an oil-free vapour compression refrigeration system.
  • Identifiant de la fiche : 30025981
  • Langues : Anglais
  • Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Date d'édition : 24/08/2019
  • DOI : http://dx.doi.org/10.18462/iir.icr.2019.0315

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