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Heat transfer characteristics of accumulator heat exchangers under various geometric and operating conditions / Hoon Kang in International journal of refrigeration, Vol. 34 N° 4 (Juin 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 1077-1084 Titre : Heat transfer characteristics of accumulator heat exchangers under various geometric and operating conditions Titre original : Caractéristiques de transfert de chaleur des échangeurs de chaleur à accumulation sous diverses conditions géométriques et de fonctionnement Type de document : texte imprimé Auteurs : Hoon Kang, Auteur ; Ilyong Cho, Auteur ; Honghee Park, Auteur Année de publication : 2011 Article en page(s) : pp. 1077-1084 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Heat  exchanger  Heat  transfer  Sub-cooling  Air-conditioner  Refrigerant Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : To minimize the possibility of flash gas generation at the inlet of the expansion device in multi air-conditioners, an accumulator heat exchanger is usually adopted. In this study, the heat transfer rate and subcooling difference in an accumulator heat exchanger were measured under various operating and geometric conditions. The effect of the operating conditions on the performance of the accumulator heat exchanger was analyzed for R-22, R-134a, and R-410A. The performance of the accumulator heat exchanger was also analyzed by varying diverse geometric parameters: the inner volume and the ratio of the diameter to height of the accumulator, and the diameter, length, and bending diameter of the inner heat exchanger. In addition, the flow of the refrigerant-oil mixture inside the accumulator was visualized. Based on the measured data, a dimensionless correlation for predicting the subcooling difference across the accumulator heat exchanger was developed. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000533 [article] Heat transfer characteristics of accumulator heat exchangers under various geometric and operating conditions = Caractéristiques de transfert de chaleur des échangeurs de chaleur à accumulation sous diverses conditions géométriques et de fonctionnement [texte imprimé] / Hoon Kang, Auteur ; Ilyong Cho, Auteur ; Honghee Park, Auteur . - 2011 . - pp. 1077-1084. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 1077-1084 Mots-clés : Heat  exchanger  Heat  transfer  Sub-cooling  Air-conditioner  Refrigerant Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : To minimize the possibility of flash gas generation at the inlet of the expansion device in multi air-conditioners, an accumulator heat exchanger is usually adopted. In this study, the heat transfer rate and subcooling difference in an accumulator heat exchanger were measured under various operating and geometric conditions. The effect of the operating conditions on the performance of the accumulator heat exchanger was analyzed for R-22, R-134a, and R-410A. The performance of the accumulator heat exchanger was also analyzed by varying diverse geometric parameters: the inner volume and the ratio of the diameter to height of the accumulator, and the diameter, length, and bending diameter of the inner heat exchanger. In addition, the flow of the refrigerant-oil mixture inside the accumulator was visualized. Based on the measured data, a dimensionless correlation for predicting the subcooling difference across the accumulator heat exchanger was developed. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000533