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An air-standard cycle and a thermodynamic perspective on operational limits of Ranque–Hilsh or vortex tubes / José Roberto Simões-Moreira in International journal of refrigeration, Vol. 33 N° 4 (Juin 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 4 (Juin 2010) . - pp. 765-773 Titre : An air-standard cycle and a thermodynamic perspective on operational limits of Ranque–Hilsh or vortex tubes Titre original : Cycle à air traditionnel, aspects thermodynamiques et limites du fonctionnement des tubes Ranque-Hilsch ou vortex Type de document : texte imprimé Auteurs : José Roberto Simões-Moreira, Auteur Année de publication : 2010 Article en page(s) : pp. 765-773 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Vortex  tube  Thermodynamic  cycle  Ranque-Hilsch  Energy  balance  COP Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A Thermodynamic air-standard cycle was envisaged for Ranque–Hilsh (R–H) or Vortex Tubes to provide relevant Thermodynamic analysis and tools for setting operating limits according to the conservation laws of mass and energy, as well as the constraint of the Second Law of Thermodynamics. The study used an integral or control volume approach and resulted in establishing working equations for evaluating the performance of an R–H tube. The work proved that the coefficient of performance does not depend on the R–H tube operating mode, i.e., the same value is obtained independently if the R–H tube operates either as a heat pump or as a refrigeration device. It was also shown that the isentropic coefficient of performance displays optima values of cold and hot mass fractions for a given operating pressure ratio. Finally, the study was concluded by comparing the present analysis with some experimental data available in the literature for operating pressures ranging 2–11 atm. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000198 [article] An air-standard cycle and a thermodynamic perspective on operational limits of Ranque–Hilsh or vortex tubes = Cycle à air traditionnel, aspects thermodynamiques et limites du fonctionnement des tubes Ranque-Hilsch ou vortex [texte imprimé] / José Roberto Simões-Moreira, Auteur . - 2010 . - pp. 765-773. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 4 (Juin 2010) . - pp. 765-773 Mots-clés : Vortex  tube  Thermodynamic  cycle  Ranque-Hilsch  Energy  balance  COP Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A Thermodynamic air-standard cycle was envisaged for Ranque–Hilsh (R–H) or Vortex Tubes to provide relevant Thermodynamic analysis and tools for setting operating limits according to the conservation laws of mass and energy, as well as the constraint of the Second Law of Thermodynamics. The study used an integral or control volume approach and resulted in establishing working equations for evaluating the performance of an R–H tube. The work proved that the coefficient of performance does not depend on the R–H tube operating mode, i.e., the same value is obtained independently if the R–H tube operates either as a heat pump or as a refrigeration device. It was also shown that the isentropic coefficient of performance displays optima values of cold and hot mass fractions for a given operating pressure ratio. Finally, the study was concluded by comparing the present analysis with some experimental data available in the literature for operating pressures ranging 2–11 atm. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000198