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Document IIF

Étude comparative expérimentale sur les caractéristiques de transfert de chaleur d'écoulement en ébullition de frigorigènes purs ou mélangés.

Comparative experimental study on flow boiling heat transfer characteristics of pure and mixed refrigerants.

Auteurs : KUNDU A., KUMAR R., GUPTA A.

Type d'article : Article, Article de la RIF

Résumé

An experimental study is carried out to investigate the characteristics of the flow boiling heat transfer for different fluid, namely, pure refrigerant (R134a), quasi-azeotropic mixture (R410A) and zeotropic mixture (R407C). The test section is a smooth horizontal tube (7.0 mm ID) uniformly heated by the resistance heating effect. The flow boiling characteristics of the refrigerants are evaluated varying: (i) the refrigerant mass velocities within the range 100–400 kgm-2s-1; (ii) the heat fluxes within 3.0–10.0 kWm-2; (iii) the inlet temperatures to the evaporator within 5°C-9°C. In this study, the effect on the heat transfer coefficient and two-phase pressure drop of vapor quality, mass velocity, imposed heat flux and fluid thermo-physical properties are examined in detail. Moreover, an assessment of predictive methods is provided for local heat transfer coefficients; also a direct comparison of flow regimes visualizations for refrigerants with a flow pattern map available in the literature is presented.

Documents disponibles

Format PDF

Pages : 136-147

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 : Comparative experimental study on flow boiling heat transfer characteristics of pure and mixed refrigerants.
  • Identifiant de la fiche : 30011954
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 45
  • Date d'édition : 09/2014

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