An experimental and theoretical study of a CO2 ejector / Chen Guangming in International journal of refrigeration, Vol. 33 N° 5 (Août 2010)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 33 N° 5 (Août 2010) . - pp. 915-921 Titre : An experimental and theoretical study of a CO2 ejector Titre original : Etude expérimentale et théorique sur un éjecteur au CO2 Type de document : texte imprimé Auteurs : Chen Guangming, Auteur ; Xu Xiaoxiao, Auteur ; Liu Shuang, Auteur Année de publication : 2010 Article en page(s) : pp. 915-921 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Refrigeration system Ejector Carbon dioxide Heat pump Domestic hot water Calculation Performance Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In this paper we represent the performance of an ejector used in the CO2 heat pump water heater system by means of experimental and theoretical studies. This work accounts for the effects of primary flow pressure, entrained flow pressure and back pressure on the entrainment ratio in off-design conditions. The performance of the ejector is experimentally investigated in a CO2-ejector test rig. Using ejector characteristic-curve equations, we provide predictions in good agreement with the experimental data. Furthermore, the model predictions will be utilized as a design tool for optimizing the performance of next generation ejector. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000228 [article] An experimental and theoretical study of a CO2 ejector = Etude expérimentale et théorique sur un éjecteur au CO2 [texte imprimé] / Chen Guangming, Auteur ; Xu Xiaoxiao, Auteur ; Liu Shuang, Auteur . - 2010 . - pp. 915-921. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 5 (Août 2010) . - pp. 915-921 Mots-clés : Refrigeration system Ejector Carbon dioxide Heat pump Domestic hot water Calculation Performance Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In this paper we represent the performance of an ejector used in the CO2 heat pump water heater system by means of experimental and theoretical studies. This work accounts for the effects of primary flow pressure, entrained flow pressure and back pressure on the entrainment ratio in off-design conditions. The performance of the ejector is experimentally investigated in a CO2-ejector test rig. Using ejector characteristic-curve equations, we provide predictions in good agreement with the experimental data. Furthermore, the model predictions will be utilized as a design tool for optimizing the performance of next generation ejector. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000228

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High-pressure phase behavior for poly[dodecyl methacrylate] + supercritical solvents + cosolvents and carbon dioxide + dodecyl methacrylate mixture / Liu Shuang in Industrial & engineering chemistry research, Vol. 48 N° 16 (Août 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 16 (Août 2009) . - pp. 7821–7827 Titre : High-pressure phase behavior for poly[dodecyl methacrylate] + supercritical solvents + cosolvents and carbon dioxide + dodecyl methacrylate mixture Type de document : texte imprimé Auteurs : Liu Shuang, Auteur ; Ha-Yeon Lee, Auteur ; Soon-Do Yoon, Auteur Année de publication : 2009 Article en page(s) : pp. 7821–7827 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Cloud-point curve Poly(dodecyl methacrylate) Dodecyl methacrylate Binary mixtures Ternary Résumé : Experimental cloud-point curves for poly(dodecyl methacrylate) [P(DDMA)] + dodecyl methacrylate (DDMA) or dimethyl ether (DME) in supercritical CO2 are reported for the binary and ternary mixtures up to 473 K and 248.0 MPa. The location of the P(DDMA) + CO2 cloud-point curve shifts to lower temperatures and pressures when DDMA or DME is used as a cosolvent. P(DDMA) does not dissolve in pure CO2 to the temperature of 493 K and the pressure of 260.0 MPa. High-pressure phase behavior data are presented for the CO2 + DDMA system at 313.2−393.2 K and up to ca. 25.2 MPa. The system exhibits type-I phase behavior with a continuous mixture-critical curve, and the system is adequately modeled with the Peng−Robinson equation of state. High-pressure phase behavior data are reported for P(DDMA) in supercritical propane, propylene, butane, and 1-butene. Cloud-point curves for the P(DDMA) in C4 hydrocarbons are at lower temperatures than the P(DDMA) + C3 hydrocarbons curves at fixed pressures. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900598w [article] High-pressure phase behavior for poly[dodecyl methacrylate] + supercritical solvents + cosolvents and carbon dioxide + dodecyl methacrylate mixture [texte imprimé] / Liu Shuang, Auteur ; Ha-Yeon Lee, Auteur ; Soon-Do Yoon, Auteur . - 2009 . - pp. 7821–7827. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 16 (Août 2009) . - pp. 7821–7827 Mots-clés : Cloud-point curve Poly(dodecyl methacrylate) Dodecyl methacrylate Binary mixtures Ternary Résumé : Experimental cloud-point curves for poly(dodecyl methacrylate) [P(DDMA)] + dodecyl methacrylate (DDMA) or dimethyl ether (DME) in supercritical CO2 are reported for the binary and ternary mixtures up to 473 K and 248.0 MPa. The location of the P(DDMA) + CO2 cloud-point curve shifts to lower temperatures and pressures when DDMA or DME is used as a cosolvent. P(DDMA) does not dissolve in pure CO2 to the temperature of 493 K and the pressure of 260.0 MPa. High-pressure phase behavior data are presented for the CO2 + DDMA system at 313.2−393.2 K and up to ca. 25.2 MPa. The system exhibits type-I phase behavior with a continuous mixture-critical curve, and the system is adequately modeled with the Peng−Robinson equation of state. High-pressure phase behavior data are reported for P(DDMA) in supercritical propane, propylene, butane, and 1-butene. Cloud-point curves for the P(DDMA) in C4 hydrocarbons are at lower temperatures than the P(DDMA) + C3 hydrocarbons curves at fixed pressures. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900598w

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