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Étude expérimentale de la chute de pression lors de l’écoulement diphasique de R1234yf dans des tubes lisses horizontaux d’un diamètre interne de 3,2 mm à 8,0 mm.

Experimental investigation of pressure drop during two-phase flow of R1234yf in smooth horizontal tubes with internal diameters of 3.2 mm to 8.0 mm.

Auteurs : GARCIA PABON J. J., KHOSRAVI A., NUNES R., et al.

Type d'article : Article, Article de la RIF

Résumé

In this study, the two-phase pressure drop of R1234yf refrigerant (as an alternative to R134a) in a smooth horizontal tube is investigated. Tests are carried out and under several conditions of vapor quality (0% to 100%), mass velocity (200, 300 and 400 kg/m ²s), heat flux (0, 7 and 14 kW/m ²) and evaporation tempera- tures (20 °C and 30 °C). The internal diameters tested are 3.2 mm, 4.8 mm, 6.4 mm and 8.0 mm. A com- parison of pressure drop between R1234yf and R134a is also carried out. The results demonstrate that the two-phase pressure gradient of R1234yf is approximately 20% lower than that of R134a. The experi- mental data is compared with 19 correlations from the literature. From this comparison, it is concluded that the experimental data are in accordance with the correlation proposed by Xu and Fang with a mean absolute error of 20% and with approximately 65% of the data predicted within a ±30% error band.

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Format PDF

Pages : 426–436

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Détails

  • Titre original : Experimental investigation of pressure drop during two-phase flow of R1234yf in smooth horizontal tubes with internal diameters of 3.2 mm to 8.0 mm.
  • Identifiant de la fiche : 30026602
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 104
  • Date d'édition : 08/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2019.05.019

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