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Thermal and hydraulic analysis of aluminium oblique-tube condenser coils with plain fins manufactured by controlled atmosphere brazing.

Analyse thermique et hydraulique de serpentins de condenseur à tube oblique en aluminium à ailettes lisses fabriquées par brasage sous atmosphère contrôlée.

Auteurs : LEWPIRIYAWONG N., KHOO K. L., SUN C., et al.

Type d'article : Article, Article de la RIF

Résumé

This paper presents new development of aluminium oblique-tube condenser coils with plain fins manufactured by controlled atmospheric brazing (CAB) for air-conditioning applications. The CAB technique provides good quality joints and thermal contact between oblique tubes and fins for more effective heat transfer. Performances of seven oblique-tube coils with different numbers of tubes per pass (i.e. 1, 2, 3, 4, 5, 7 and 14) were assessed against those of a commercial circular-tube coil with corrugated fins. The contribution of the slender oblique tubes with plain fins reduced air pressure drop penalties by 20.9–30.9% for 1–3?m/s air velocity. Thermal performance of the 1-tube-per-pass coil surpassed that of the commercial coil albeit not energy-saving. On the other hand, the 4-tube pass coil when matching with the heat transfer performance of the 3- and 2-tube-per-pass coils and the circular-tube coil saved water-side pump energy as high as 27.9%, 36.3% and 38.7%, respectively.

Documents disponibles

Format PDF

Pages : 81-89

Disponible

  • Prix public

    15 €

  • Prix membre*

    Gratuit

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

Détails

  • Titre original : Thermal and hydraulic analysis of aluminium oblique-tube condenser coils with plain fins manufactured by controlled atmosphere brazing.
  • Identifiant de la fiche : 30025735
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 101
  • Date d'édition : 05/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2019.02.019

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