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An application of the extended corresponding states model to thermodynamic property calculations for trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) / Ryo Akasaka in International journal of refrigeration, Vol. 33 N° 5 (Août 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 5 (Août 2010) . - pp. 907-914 Titre : An application of the extended corresponding states model to thermodynamic property calculations for trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) Titre original : Application de l'extension d'un modèle d'états correspondants étendus pour le calcul des propriétés thermodynamiques du trans-1,3,3,3-tétrafluoropropène (HFO-1234ze[E]) Type de document : texte imprimé Auteurs : Ryo Akasaka, Auteur Année de publication : 2010 Article en page(s) : pp. 907-914 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Refrigerant  HFO-1234ze[E]  R134a  Modelling  Thermodynamic  property  Equation  of  state  Density  Pressure Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A new thermodynamic property model is presented for trans-1,3,3,3-tetrafluoropropene (trans-CHFdouble bond; length as m-dashCHCF3, HFO-1234ze(E)) based upon available experimental data. This model is an application of the extended corresponding states principle, which is one approach in property modeling for fluids with limited experimental databases. The model is capable of calculating with reasonable accuracies various properties of HFO-1234ze(E), including the PVT relation, energies, heat capacities, and vapor–liquid equilibrium. The reference fluid of the model is 1,1,1,2-tetrafluoroethane (HFC-134a). Comparisons of calculated values using the model are made with experimental data. Typical uncertainties of calculated properties are 0.2% in the vapor pressure, 0.5% in the liquid density, and 5% in the liquid and vapor isobaric heat capacities. In addition, an ancillary equation is given for the vapor pressure. Thermodynamic property diagrams generated using the model are also provided. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000496 [article] An application of the extended corresponding states model to thermodynamic property calculations for trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) = Application de l'extension d'un modèle d'états correspondants étendus pour le calcul des propriétés thermodynamiques du trans-1,3,3,3-tétrafluoropropène (HFO-1234ze[E]) [texte imprimé] / Ryo Akasaka, Auteur . - 2010 . - pp. 907-914. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 5 (Août 2010) . - pp. 907-914 Mots-clés : Refrigerant  HFO-1234ze[E]  R134a  Modelling  Thermodynamic  property  Equation  of  state  Density  Pressure Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A new thermodynamic property model is presented for trans-1,3,3,3-tetrafluoropropene (trans-CHFdouble bond; length as m-dashCHCF3, HFO-1234ze(E)) based upon available experimental data. This model is an application of the extended corresponding states principle, which is one approach in property modeling for fluids with limited experimental databases. The model is capable of calculating with reasonable accuracies various properties of HFO-1234ze(E), including the PVT relation, energies, heat capacities, and vapor–liquid equilibrium. The reference fluid of the model is 1,1,1,2-tetrafluoroethane (HFC-134a). Comparisons of calculated values using the model are made with experimental data. Typical uncertainties of calculated properties are 0.2% in the vapor pressure, 0.5% in the liquid density, and 5% in the liquid and vapor isobaric heat capacities. In addition, an ancillary equation is given for the vapor pressure. Thermodynamic property diagrams generated using the model are also provided. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000496

Measurements of saturated densities and critical parameters for the binary mixture of 2,3,3,3-tetrafluoropropene (R-1234yf) + difluoromethane (R-32) / Ryo Akasaka in International journal of refrigeration, Vol. 36 N° 4 (Juin 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 4 (Juin 2013) . - pp. 1341–1346 Titre : Measurements of saturated densities and critical parameters for the binary mixture of 2,3,3,3-tetrafluoropropene (R-1234yf) + difluoromethane (R-32) Titre original : Mesures des masses volumiques saturées et paramètres critiques d'un mélange binaire de 2,3,3,3-tétrafluoropropène (R-1234yf) + difluorométhane (R-32) Type de document : texte imprimé Auteurs : Ryo Akasaka, Auteur ; Katsuyuki Tanaka, Auteur ; Yukihiro Higashi, Auteur Année de publication : 2013 Article en page(s) : pp. 1341–1346 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Critical  density;  Critical  point;  Critical  pressure;  Critical  temperature;  R-1234yf  +  R-32  mixture Résumé : The vapor–liquid coexistence curves near the critical point of the binary mixture of 2,3,3,3-tetrafluoropropene (R-1234yf) + difluoromethane (R-32) were measured by means of the visual observation of meniscus disappearance. Eleven, eighteen, and eleven saturated densities were obtained for mixtures with 50.00 mass%, 80.01 mass%, and 90.00 mass% of R-1234yf, respectively. The critical temperatures, critical densities, and critical molar volumes of the mixtures were determined from the meniscus disappearing level and the intensity of the critical opalescence. The critical pressures of the mixtures were also determined from the analysis of pρTx measurements. The composition dependence of the critical parameters was formulated with simple correlations. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713000285 [article] Measurements of saturated densities and critical parameters for the binary mixture of 2,3,3,3-tetrafluoropropene (R-1234yf) + difluoromethane (R-32) = Mesures des masses volumiques saturées et paramètres critiques d'un mélange binaire de 2,3,3,3-tétrafluoropropène (R-1234yf) + difluorométhane (R-32) [texte imprimé] / Ryo Akasaka, Auteur ; Katsuyuki Tanaka, Auteur ; Yukihiro Higashi, Auteur . - 2013 . - pp. 1341–1346. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 4 (Juin 2013) . - pp. 1341–1346 Mots-clés : Critical  density;  Critical  point;  Critical  pressure;  Critical  temperature;  R-1234yf  +  R-32  mixture Résumé : The vapor–liquid coexistence curves near the critical point of the binary mixture of 2,3,3,3-tetrafluoropropene (R-1234yf) + difluoromethane (R-32) were measured by means of the visual observation of meniscus disappearance. Eleven, eighteen, and eleven saturated densities were obtained for mixtures with 50.00 mass%, 80.01 mass%, and 90.00 mass% of R-1234yf, respectively. The critical temperatures, critical densities, and critical molar volumes of the mixtures were determined from the meniscus disappearing level and the intensity of the critical opalescence. The critical pressures of the mixtures were also determined from the analysis of pρTx measurements. The composition dependence of the critical parameters was formulated with simple correlations. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713000285