Documents disponibles écrits par cet auteur

Subcooled liquid density measurements and PvT measurements in the vapor phase for 3,3,3-trifluoroprop-1-ene (R1243zf) / Giovanni Di Nicola in International journal of refrigeration, Vol. 36 N° 8 (Décembre 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 8 (Décembre 2013) . - pp. 2209–2215 Titre : Subcooled liquid density measurements and PvT measurements in the vapor phase for 3,3,3-trifluoroprop-1-ene (R1243zf) Titre original : Mesures de la masse volumique du liquide sous-refroidi et mesures PvT lors de la phase gazeuse pour le 3,3,3-trifluoroprop-1-ène (R1243zf) Type de document : texte imprimé Auteurs : Giovanni Di Nicola, Auteur ; J. Steven Brown, Auteur ; Laura Fedele, Auteur Année de publication : 2014 Article en page(s) : pp. 2209–2215 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : 3,3,3-Trifluoroprop-1-ene  (R1243zf);  CF3CHdouble  bond;  length  as  m-dashCH2;  CAS  number  677-21-4;  liquid  density;  PvT  behavior;  tait  correlation Résumé : The fluorinated propene isomer R1243zf (3,3,3-trifluoroprop-1-ene, CF3CFdouble bond; length as m-dashCH2, CAS number 677-21-4) is a potential alternative refrigerant with short atmospheric lifetime, low-GWP, and low acute toxicity; however, because of its flammability it is being considered primarily as a component in blends. In this paper, 302 subcooled liquid density data and 101 vapor phase PvT data are presented. The subcooled liquid density data are measured for eight isotherms, evenly separated approximately from 283 K to 353 K, for pressures from close to saturation to 35 MPa and the vapor phase PvT data are measured for six isochores for temperatures approximately from 278 K to 368 K and for pressures approximately from 260 kPa to 912 kPa. In addition, a saturated liquid density correlation, a Tait correlation for the subcooled liquid density data, and a Martin–Hou Equation of State for the vapor phase PvT data are presented. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002089 [article] Subcooled liquid density measurements and PvT measurements in the vapor phase for 3,3,3-trifluoroprop-1-ene (R1243zf) = Mesures de la masse volumique du liquide sous-refroidi et mesures PvT lors de la phase gazeuse pour le 3,3,3-trifluoroprop-1-ène (R1243zf) [texte imprimé] / Giovanni Di Nicola, Auteur ; J. Steven Brown, Auteur ; Laura Fedele, Auteur . - 2014 . - pp. 2209–2215. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 8 (Décembre 2013) . - pp. 2209–2215 Mots-clés : 3,3,3-Trifluoroprop-1-ene  (R1243zf);  CF3CHdouble  bond;  length  as  m-dashCH2;  CAS  number  677-21-4;  liquid  density;  PvT  behavior;  tait  correlation Résumé : The fluorinated propene isomer R1243zf (3,3,3-trifluoroprop-1-ene, CF3CFdouble bond; length as m-dashCH2, CAS number 677-21-4) is a potential alternative refrigerant with short atmospheric lifetime, low-GWP, and low acute toxicity; however, because of its flammability it is being considered primarily as a component in blends. In this paper, 302 subcooled liquid density data and 101 vapor phase PvT data are presented. The subcooled liquid density data are measured for eight isotherms, evenly separated approximately from 283 K to 353 K, for pressures from close to saturation to 35 MPa and the vapor phase PvT data are measured for six isochores for temperatures approximately from 278 K to 368 K and for pressures approximately from 260 kPa to 912 kPa. In addition, a saturated liquid density correlation, a Tait correlation for the subcooled liquid density data, and a Martin–Hou Equation of State for the vapor phase PvT data are presented. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002089

A thermodynamic analysis of refrigerants / Piotr A. Domanski in International journal of refrigeration, Vol. 38 (Février 2014) 

Public ISBD [article]  in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 71–79 Titre : A thermodynamic analysis of refrigerants : Performance limits of the vapor compression cycle Titre original : Une analyse thermodynamique des frigorigènes : limites des performances du cycle à compression de vapeur Type de document : texte imprimé Auteurs : Piotr A. Domanski, Auteur ; J. Steven Brown, Auteur ; Jaehyeok Heo, Auteur Année de publication : 2014 Article en page(s) : pp. 71–79 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Coefficient  of  performance;  Evolutionary  algorithm;  Refrigerant;  Vapor  compression  cycle Résumé : This paper explores the thermodynamic performance limits of the vapor compression cycle. We have applied evolutionary algorithms to explore the performance of hypothetical refrigerants defined by the thermodynamic parameters used by the extended corresponding states model for fluid properties. We identified optimal values of these parameters required to reach the performance limits. The study confirmed the fundamental trade-off between the coefficient of performance (COP) and volumetric capacity, and indicated refrigerant critical temperature as the dominant parameter influencing the tradeoff. Thermodynamic performance limits depend on the operating conditions and the cycle design. These limits are represented by Pareto fronts developed for the objective functions COP and volumetric capacity. As expected, the performance of current refrigerants falls below the Pareto front limits. We demonstrate that for practical cycles the developed methodology and resulting Pareto fronts are more realistic benchmarks for the performance potentials of refrigerants than is COP alone, which is an efficiency only metric. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002703 [article] A thermodynamic analysis of refrigerants = Une analyse thermodynamique des frigorigènes : limites des performances du cycle à compression de vapeur : Performance limits of the vapor compression cycle [texte imprimé] / Piotr A. Domanski, Auteur ; J. Steven Brown, Auteur ; Jaehyeok Heo, Auteur . - 2014 . - pp. 71–79. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 71–79 Mots-clés : Coefficient  of  performance;  Evolutionary  algorithm;  Refrigerant;  Vapor  compression  cycle Résumé : This paper explores the thermodynamic performance limits of the vapor compression cycle. We have applied evolutionary algorithms to explore the performance of hypothetical refrigerants defined by the thermodynamic parameters used by the extended corresponding states model for fluid properties. We identified optimal values of these parameters required to reach the performance limits. The study confirmed the fundamental trade-off between the coefficient of performance (COP) and volumetric capacity, and indicated refrigerant critical temperature as the dominant parameter influencing the tradeoff. Thermodynamic performance limits depend on the operating conditions and the cycle design. These limits are represented by Pareto fronts developed for the objective functions COP and volumetric capacity. As expected, the performance of current refrigerants falls below the Pareto front limits. We demonstrate that for practical cycles the developed methodology and resulting Pareto fronts are more realistic benchmarks for the performance potentials of refrigerants than is COP alone, which is an efficiency only metric. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002703

A thermodynamic analysis of refrigerants / Mark O. McLinden in International journal of refrigeration, Vol. 38 (Février 2014) 

Public ISBD [article]  in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 80–92 Titre : A thermodynamic analysis of refrigerants : Possibilities and tradeoffs for Low-GWP refrigerants Titre original : Une analyse thermodynamique des frigorigènes: possibilités et compromis impliqués pour les frigorigènes à faible GWP Type de document : texte imprimé Auteurs : Mark O. McLinden, Auteur ; Andrei F. Kazakov, Auteur ; J. Steven Brown, Auteur Année de publication : 2014 Article en page(s) : pp. 80–92 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Global  warming  potential;  Low  GWP  refrigerant;  Thermodynamic  properties;  Vapor  compression  cycle Résumé : We explore the possibilities for refrigerants having low global warming potential (GWP). A set of about 1200 candidate fluids is identified from more than 56 000 small molecules examined by applying screening criteria to estimates for GWP, flammability, stability, toxicity, and critical temperature. Methodologies for this screening have been presented in earlier works and are summarized here. The fluids with critical temperatures between 300 K and 400 K (i.e., those that could be used in current types of equipment with minor modifications) number 62. The fluids include halogenated olefins; compounds containing oxygen, nitrogen, or sulfur; as well as carbon dioxide. We discuss the tradeoffs presented by these 62 candidates, considering their thermodynamic properties and their stability and toxicity characteristics. No fluid is ideal in all regards—all have one or more negative attributes: poor thermodynamic properties, toxicity, chemical instability, low to moderate flammability, or very high operating pressures. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002661 [article] A thermodynamic analysis of refrigerants = Une analyse thermodynamique des frigorigènes: possibilités et compromis impliqués pour les frigorigènes à faible GWP : Possibilities and tradeoffs for Low-GWP refrigerants [texte imprimé] / Mark O. McLinden, Auteur ; Andrei F. Kazakov, Auteur ; J. Steven Brown, Auteur . - 2014 . - pp. 80–92. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 80–92 Mots-clés : Global  warming  potential;  Low  GWP  refrigerant;  Thermodynamic  properties;  Vapor  compression  cycle Résumé : We explore the possibilities for refrigerants having low global warming potential (GWP). A set of about 1200 candidate fluids is identified from more than 56 000 small molecules examined by applying screening criteria to estimates for GWP, flammability, stability, toxicity, and critical temperature. Methodologies for this screening have been presented in earlier works and are summarized here. The fluids with critical temperatures between 300 K and 400 K (i.e., those that could be used in current types of equipment with minor modifications) number 62. The fluids include halogenated olefins; compounds containing oxygen, nitrogen, or sulfur; as well as carbon dioxide. We discuss the tradeoffs presented by these 62 candidates, considering their thermodynamic properties and their stability and toxicity characteristics. No fluid is ideal in all regards—all have one or more negative attributes: poor thermodynamic properties, toxicity, chemical instability, low to moderate flammability, or very high operating pressures. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002661

Thermodynamic properties of eight fluorinated olefins / J. Steven Brown in International journal of refrigeration, Vol. 33 N° 2 (Mars 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 2 (Mars 2010) . - pp. 235-241 Titre : Thermodynamic properties of eight fluorinated olefins Titre original : Propriétés thermodynamiques de huit oléfines fluorées Type de document : texte imprimé Auteurs : J. Steven Brown, Auteur ; Claudio Zilio, Auteur ; Alberto Cavallini, Auteur Année de publication : 2011 Article en page(s) : pp. 235-241 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Refrigerant  R-1225ye(E)  R1225ye(Z)  R1225zc  R1234ye(E)  R1234yf  R1234ze(E)  R1234ze(Z)  R1243zf Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Group contribution methods are used to predict the critical temperatures, critical pressures, critical densities, acentric factors, and ideal gas specific heats at constant pressure for eight fluorinated olefins, namely: R-1225ye(E), R-1225ye(Z), R-1225zc, R-1234ye(E), R-1234yf, R-1234ze(E), R-1234ze(Z), and R-1243zf. For the same eight refrigerants, the Peng–Robinson equation of state is used to predict thermodynamic properties, which are presented in pressure-enthalpy and temperature-entropy state diagrams. To provide the reader with some sense of the predictive capability of the methodology, property predictions for R-134a are compared to known data. Property predictions for R-1234yf are compared, where possible, to the open literature. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700709000930 [article] Thermodynamic properties of eight fluorinated olefins = Propriétés thermodynamiques de huit oléfines fluorées [texte imprimé] / J. Steven Brown, Auteur ; Claudio Zilio, Auteur ; Alberto Cavallini, Auteur . - 2011 . - pp. 235-241. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 2 (Mars 2010) . - pp. 235-241 Mots-clés : Refrigerant  R-1225ye(E)  R1225ye(Z)  R1225zc  R1234ye(E)  R1234yf  R1234ze(E)  R1234ze(Z)  R1243zf Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Group contribution methods are used to predict the critical temperatures, critical pressures, critical densities, acentric factors, and ideal gas specific heats at constant pressure for eight fluorinated olefins, namely: R-1225ye(E), R-1225ye(Z), R-1225zc, R-1234ye(E), R-1234yf, R-1234ze(E), R-1234ze(Z), and R-1243zf. For the same eight refrigerants, the Peng–Robinson equation of state is used to predict thermodynamic properties, which are presented in pressure-enthalpy and temperature-entropy state diagrams. To provide the reader with some sense of the predictive capability of the methodology, property predictions for R-134a are compared to known data. Property predictions for R-1234yf are compared, where possible, to the open literature. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700709000930