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Études expérimentales d’un éjecteur diphasique fonctionnant à l’isobutane.

Experimental investigations of two-phase ejector operating with isobutane.

Numéro : pap. n. 644

Auteurs : SMIERCIEW K., GAGAN J., BUTRYMOWICZ D., et al.

Résumé

Application of a two-phase ejector in a vapour compression refrigeration system is a promising way to increase the system efficiency. Most of the investigations deal with the performance of the whole compression-refrigeration system. In contrary the paper deals with two-phase ejector only. Low GWP natural refrigerant R600a was used in the experiment. The velocity coefficients have been determined. Velocity coefficients f for nozzles in range 0.4 < f <1.0 and f < 0.4 for suction and mixing chambers and diffuser were obtained. Basing on the experimental results correlations for velocity coefficient for components of the ejector have been proposed. Two physical parameters: quality of fluid, and the volumetric entrainment ratio, were selected as parameters describing relation of the velocity coefficient. The numerical results based on the proposed correlations fits with experimental data within 30%.

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Pages : 8

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Détails

  • Titre original : Experimental investigations of two-phase ejector operating with isobutane.
  • Identifiant de la fiche : 30026456
  • Langues : Anglais
  • Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Date d'édition : 24/08/2019
  • DOI : http://dx.doi.org/10.18462/iir.icr.2019.0644

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