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Résultats expérimentaux pour la visualisation et le gradient de pression diphasique du HFO-1234yf à l'intérieur de tubes droits horizontaux.

Experimental results for HFO-1234yf visualization and two-phase pressure gradient in horizontal straight tubes.

Numéro : pap. ID: 264

Auteurs : PADILLA M., REVELLIN R., HABERSCHILL P., et al.

Résumé

The purpose of this experimental investigation is to present HFO-1234yf flow regime visualizations and to compare them with flow pattern prediction tools found in the literature. HFO-1234yf two-phase flow is investigated in a 6.7 mm inner diameter glass straight tube from simultaneous top and side visualizations with a high speed high definition camera. The different flow regimes observed are: slug, intermittent and annular flows. In addition, 308 new two-phase frictional pressure drop data points using HFO-1234yf are measured in straight tubes of inner diameter (D) from 7.90 to 10.85 mm, mass velocities from 291 to 1152 kg/m2.s and saturation temperatures from 4.9 to 20.2°C. The results are compared against 4 well-known two-phase frictional pressure drop prediction methods from the literature. The best accuracy is given by the method of Müller Steinhagen and Heck (1986) with around 90 % of the data predicted within a +30% error band.

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Pages : 8 p.

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Détails

  • Titre original : Experimental results for HFO-1234yf visualization and two-phase pressure gradient in horizontal straight tubes.
  • Identifiant de la fiche : 30002385
  • Langues : Anglais
  • Sujet : Alternatives aux HFC
  • Source : Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Date d'édition : 21/08/2011

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