Partager

Document IIF

Configuration de l'écoulement, transfert de chaleur et chutes de pression pendant l'évaporation de R1234ze(E) et de R134a à l'intérieur d'un tube lisse circulaire : expériences et évaluation des méthodes prévisionnelles.

Flow pattern map, heat transfer and pressure drops during evaporation of R1234ze(E) and R134a in a horizontal, circular smooth tube: experiments and assessment of predictive methods.

Auteurs : GRAUSO S., MASTRULLO R., MAURO A. W., et al.

Type d'article : Article, Article de la RIF

Résumé

This paper presents experimental results for local heat transfer coefficients, adiabatic frictional pressure gradients and two-phase flow regimes with the low-GWP refrigerant R1234ze(E), compared to HFC refrigerant R134a in the same conditions. In particular the results refer to an experimental investigation carried out in a circular smooth tube of 6.00 mm of inner diameter, for saturation temperatures between -2.9 and 12.1°C, mass fluxes between 146 and 520 kg/m2.s and heat fluxes between 5.0 and 20.4 kW/m2. These experimental results are compared to those for R134a at the same operating conditions. Moreover, an assessment of predictive methods is provided for local heat transfer coefficients and frictional pressure gradients; also a direct comparison of flow regimes visualizations for R1234ze(E) with a flow pattern map available in literature is presented.

Documents disponibles

Format PDF

Pages : 478-491

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Flow pattern map, heat transfer and pressure drops during evaporation of R1234ze(E) and R134a in a horizontal, circular smooth tube: experiments and assessment of predictive methods.
  • Identifiant de la fiche : 30007161
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 2
  • Date d'édition : 03/2013

Liens


Voir d'autres articles du même numéro (26)
Voir la source

Indexation