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Document IIF

Performance du faisceau de tubes simple côté calandre dans un système d’évaporation à détente directe d’ammoniac à passages multiples, à différents degrés de surchauffe en sortie.

Shell side plain tube bundle performance of a multi-pass direct expansion evaporation of ammonia at various degrees of exit superheat.

Auteurs : ABBAS A., AYUB Z. H., AYUB A. H., et al.

Type d'article : Article, Article de la RIF

Résumé

This paper presents the experimental results of shell side dry expansion evaporation characteristics of ammonia on a triangular pitch plain tube bundle in a multi pass cross flow configuration evaporator. Heat exchanger had 4 passes with 3 plain tubes in each pass. The average bundle heat transfer coefficient showed better performance at -1.7 °C versus -20 °C. Heat transfer performance of individual passeswere studied at saturation temperature of -1.7 and -20 °C, heat flux range of 5 to 45 kW m-2 and exit superheat temperature of 2 to 10 °C. Present data suggest that variation in bundle performance is less significant at lower heat fluxes with low degree of exit superheat. Top pass with maximum quality along the bundle height showed the least performance with increase in the degree of exit superheat.

Documents disponibles

Format PDF

Pages : 70-82

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 : Shell side plain tube bundle performance of a multi-pass direct expansion evaporation of ammonia at various degrees of exit superheat.
  • Identifiant de la fiche : 30021561
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 78
  • Date d'édition : 06/2017
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2017.03.020

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