A study of transcritical carbon dioxide flow through diabatic capillary tubes / Diogo L. da Silva in International journal of refrigeration, Vol. 34 N° 4 (Juin 2011)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 834-843 Titre : A study of transcritical carbon dioxide flow through diabatic capillary tubes Titre original : Etude sur l'écoulement du dioxyde de carbone transcritique à l'intérieur de tubes capillaires diabatiques Type de document : texte imprimé Auteurs : Diogo L. da Silva, Auteur ; Adriano F. Ronzoni, Auteur ; Cláudio Melo, Auteur Année de publication : 2011 Article en page(s) : pp. 834-843 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Carbon dioxide Expansion Capillary tube Heat exchanger Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : An experimental and theoretical study of the diabatic flow of carbon dioxide through lateral capillary tube suction line heat exchangers is outlined. The influence of both operating conditions (capillary tube inlet and outlet pressures, capillary tube inlet temperature and suction line inlet temperature) and tube geometry (heat exchanger length and position, suction line diameter and capillary tube length) on the heat and mass flow rates was experimentally evaluated using a purpose-built testing facility. In total, 75 tests were carried out with heat fluxes spanning from 1 to 11 kW m−2 and refrigerant mass flow rates ranging from 12 to 26 kg h−1. In addition, the mathematical model of Hermes et al. (2008) was adapted to run with carbon dioxide as working fluid. The model was validated against experimental data, and a good agreement between the experimental and calculated mass flow rates was achieved with 85% and 98% of the data points being within ±5% and ±10% error bounds, respectively. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000569 [article] A study of transcritical carbon dioxide flow through diabatic capillary tubes = Etude sur l'écoulement du dioxyde de carbone transcritique à l'intérieur de tubes capillaires diabatiques [texte imprimé] / Diogo L. da Silva, Auteur ; Adriano F. Ronzoni, Auteur ; Cláudio Melo, Auteur . - 2011 . - pp. 834-843. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 834-843 Mots-clés : Carbon dioxide Expansion Capillary tube Heat exchanger Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : An experimental and theoretical study of the diabatic flow of carbon dioxide through lateral capillary tube suction line heat exchangers is outlined. The influence of both operating conditions (capillary tube inlet and outlet pressures, capillary tube inlet temperature and suction line inlet temperature) and tube geometry (heat exchanger length and position, suction line diameter and capillary tube length) on the heat and mass flow rates was experimentally evaluated using a purpose-built testing facility. In total, 75 tests were carried out with heat fluxes spanning from 1 to 11 kW m−2 and refrigerant mass flow rates ranging from 12 to 26 kg h−1. In addition, the mathematical model of Hermes et al. (2008) was adapted to run with carbon dioxide as working fluid. The model was validated against experimental data, and a good agreement between the experimental and calculated mass flow rates was achieved with 85% and 98% of the data points being within ±5% and ±10% error bounds, respectively. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000569

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