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Experimental analysis of R1234yf as a drop-in replacement for R134a in a vapor compression system / J. Navarro-Esbrí in International journal of refrigeration, Vol. 36 N° 3 (Mai 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 870–880 Titre : Experimental analysis of R1234yf as a drop-in replacement for R134a in a vapor compression system Titre original : Analyse expérimentale du R1234yf comme frigorigène de remplacement immédiat du R134a dans un système à compression de vapeur Type de document : texte imprimé Auteurs : J. Navarro-Esbrí, Auteur ; J. M. Mendoza-Miranda, Auteur ; A. Mota-Babiloni, Auteur Année de publication : 2013 Article en page(s) : pp. 870–880 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Drop-in;  R1234yf;  R134a;  Vapor  compression  system;  Internal  heat  exchanger;  Low  GWP Résumé : This paper presents an experimental analysis of a vapor compression system using R1234yf as a drop-in replacement for R134a. In this work, we compare the energy performance of both refrigerants, R134a and R1234yf, in a monitored vapor compression system under a wide range of working conditions. So, the experimental tests are carried out varying the condensing temperature, the evaporating temperature, the superheating degree, the compressor speed, and the internal heat exchanger use. Comparisons are made taking refrigerant R134a as baseline, and the results show that the cooling capacity obtained with R1234yf in a R134a vapor compression system is about 9% lower than that obtained with R134a in the studied range. Also, when using R1234yf, the system shows values of COP about 19% lower than those obtained using R134a, being the minor difference for higher condensing temperatures. Finally, using an internal heat exchanger these differences in the energy performance are significantly reduced. En ligne : http://www.sciencedirect.com/science/article/pii/S014070071200357X [article] Experimental analysis of R1234yf as a drop-in replacement for R134a in a vapor compression system = Analyse expérimentale du R1234yf comme frigorigène de remplacement immédiat du R134a dans un système à compression de vapeur [texte imprimé] / J. Navarro-Esbrí, Auteur ; J. M. Mendoza-Miranda, Auteur ; A. Mota-Babiloni, Auteur . - 2013 . - pp. 870–880. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 870–880 Mots-clés : Drop-in;  R1234yf;  R134a;  Vapor  compression  system;  Internal  heat  exchanger;  Low  GWP Résumé : This paper presents an experimental analysis of a vapor compression system using R1234yf as a drop-in replacement for R134a. In this work, we compare the energy performance of both refrigerants, R134a and R1234yf, in a monitored vapor compression system under a wide range of working conditions. So, the experimental tests are carried out varying the condensing temperature, the evaporating temperature, the superheating degree, the compressor speed, and the internal heat exchanger use. Comparisons are made taking refrigerant R134a as baseline, and the results show that the cooling capacity obtained with R1234yf in a R134a vapor compression system is about 9% lower than that obtained with R134a in the studied range. Also, when using R1234yf, the system shows values of COP about 19% lower than those obtained using R134a, being the minor difference for higher condensing temperatures. Finally, using an internal heat exchanger these differences in the energy performance are significantly reduced. En ligne : http://www.sciencedirect.com/science/article/pii/S014070071200357X