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HFC-134a : étude expérimentale sur l'ébullition en écoulement dans un tube extrudé aux orifices multiples.

[In Japanese. / En japonais.]

Auteurs : KUWAHARA K., KAZARI K., NAKASHITA K., et al.

Type d'article : Article

Résumé

The local heat transfer and pressure drop characteristics are investigated experimentally for the flow boiling of HFC-134a in a multi-port extruded tube of 1.06 mm in hydraulic diameter. The test tube was 865 mm in total length made of aluminium. The pressure drop was measured at an interval of 191 mm, the local heat transfer coefficient was measured in every subsection of 75 mm in effective heating length. The measured pressure drop was compared with a few correlations. Those data agree with the correlation of Koyama et al., proposed for the condensation process, and of Friedel. The local heat transfer coefficients were also compared with the correlation of Yu et al. It is pointed out that the multiplier of the convection term in a rectangular channel is different from that of circular tube.

Détails

  • Titre original : [In Japanese. / En japonais.]
  • Identifiant de la fiche : 2005-1687
  • Langues : Japonais
  • Source : Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers - vol. 21 - n. 2
  • Date d'édition : 2004

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