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Numerical simulation and experimental validation of internal heat exchanger influence on CO2 trans-critical cycle performance / Joaquim Rigola in International journal of refrigeration, Vol. 33 N° 4 (Juin 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 4 (Juin 2010) . - pp. 664-674 Titre : Numerical simulation and experimental validation of internal heat exchanger influence on CO2 trans-critical cycle performance Titre original : Simulation numérique et validation expérimentale de l'influence de l'échangeur de chaleur interne sur la performance transcritique du CO2 Type de document : texte imprimé Auteurs : Joaquim Rigola, Auteur ; Nicolás Ablanque, Auteur ; Carlos D. Pérez-Segarra, Auteur Année de publication : 2010 Article en page(s) : pp. 664-674 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Refrigeration  system  Carbon  dioxide  Transcritical  cycle  Performance  Experiment  Exchanger  COP Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The present paper is a numerical and experimental comparative study of the whole vapour compression refrigerating cycle in general, and reciprocating compressors in particular, with the aim of showing the possibilities that CO2 offers for commercial refrigeration, considering a single-stage trans-critical cycle using semi-hermetic reciprocating compressors under small cooling capacity systems. The present work is focussed on the influence of using an internal heat exchanger (IHX) in order to improve the cycle performance under real working conditions. In order to validate the numerical results, an experimental unit specially designed and built to analyze trans-critical refrigerating equipments considering IHX has been built. Both numerical results and experimental data show reasonable good agreement, while the comparative global values conclude the improvement of cooling capacity and COP when IHX is considered in the CO2 trans-critical cycle. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000113 [article] Numerical simulation and experimental validation of internal heat exchanger influence on CO2 trans-critical cycle performance = Simulation numérique et validation expérimentale de l'influence de l'échangeur de chaleur interne sur la performance transcritique du CO2 [texte imprimé] / Joaquim Rigola, Auteur ; Nicolás Ablanque, Auteur ; Carlos D. Pérez-Segarra, Auteur . - 2010 . - pp. 664-674. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 4 (Juin 2010) . - pp. 664-674 Mots-clés : Refrigeration  system  Carbon  dioxide  Transcritical  cycle  Performance  Experiment  Exchanger  COP Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The present paper is a numerical and experimental comparative study of the whole vapour compression refrigerating cycle in general, and reciprocating compressors in particular, with the aim of showing the possibilities that CO2 offers for commercial refrigeration, considering a single-stage trans-critical cycle using semi-hermetic reciprocating compressors under small cooling capacity systems. The present work is focussed on the influence of using an internal heat exchanger (IHX) in order to improve the cycle performance under real working conditions. In order to validate the numerical results, an experimental unit specially designed and built to analyze trans-critical refrigerating equipments considering IHX has been built. Both numerical results and experimental data show reasonable good agreement, while the comparative global values conclude the improvement of cooling capacity and COP when IHX is considered in the CO2 trans-critical cycle. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000113