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Experimental analysis on the effect of internal heat exchanger in transcritical CO2 refrigeration cycle with two-phase ejector / Masafumi Nakagawa in International journal of refrigeration, Vol. 34 N° 7 (Novembre 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 7 (Novembre 2011) . - pp. 1577-1586 Titre : Experimental analysis on the effect of internal heat exchanger in transcritical CO2 refrigeration cycle with two-phase ejector Titre original : Analyse expérimentale d'un échangeur de chaleur interne dans un cycle frigorifique au CO2 à éjecteur diphasique Type de document : texte imprimé Auteurs : Masafumi Nakagawa, Auteur ; Ariel R. Marasigan, Auteur ; Takanori Matsukawa, Auteur Année de publication : 2011 Article en page(s) : pp. 1577-1586 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Refrigeration  system  Compression  system  Ejector  system  Carbon  dioxide  Transcritical  cycle  Heat  exchanger  Experiment-performance Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The performance of CO2 ejector refrigeration system needs further improvement to make CO2 more viable than traditional harmful refrigerants. In this research, the effect of internal heat exchanger (IHX) in the performance of ejector refrigeration system was analyzed experimentally and compared with conventional expansion refrigeration system. Experiments were performed at different operating pressure and temperature for the cases of without IHX, 30 cm IHX and 60 cm IHX. The results showed that IHX significantly increased the coefficient of performance (COP) of ejector system. At the conditions used in this research, the ejector system with 60 cm IHX provided the maximum COP improvement of up to 27% compared to similar conventional system. The motive nozzle’s inlet condition had significant effect on the performance of ejector system. The results also confirmed the presence of considerable amount of liquid refrigerant at separator’s gas outlet of ejector system which was deemed possible in our previous research. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000629 [article] Experimental analysis on the effect of internal heat exchanger in transcritical CO2 refrigeration cycle with two-phase ejector = Analyse expérimentale d'un échangeur de chaleur interne dans un cycle frigorifique au CO2 à éjecteur diphasique [texte imprimé] / Masafumi Nakagawa, Auteur ; Ariel R. Marasigan, Auteur ; Takanori Matsukawa, Auteur . - 2011 . - pp. 1577-1586. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 7 (Novembre 2011) . - pp. 1577-1586 Mots-clés : Refrigeration  system  Compression  system  Ejector  system  Carbon  dioxide  Transcritical  cycle  Heat  exchanger  Experiment-performance Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The performance of CO2 ejector refrigeration system needs further improvement to make CO2 more viable than traditional harmful refrigerants. In this research, the effect of internal heat exchanger (IHX) in the performance of ejector refrigeration system was analyzed experimentally and compared with conventional expansion refrigeration system. Experiments were performed at different operating pressure and temperature for the cases of without IHX, 30 cm IHX and 60 cm IHX. The results showed that IHX significantly increased the coefficient of performance (COP) of ejector system. At the conditions used in this research, the ejector system with 60 cm IHX provided the maximum COP improvement of up to 27% compared to similar conventional system. The motive nozzle’s inlet condition had significant effect on the performance of ejector system. The results also confirmed the presence of considerable amount of liquid refrigerant at separator’s gas outlet of ejector system which was deemed possible in our previous research. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000629