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Transfert de chaleur lors de l’ébullition de HFO-1234yf à l’intérieur d’un tube horizontal lisse de faible diamètre.

Boiling heat transfer of HFO-1234yf flowing in a smooth small-diameter horizontal tube.

Auteurs : SAITOH S., DANG C., NAKAMURA Y., et al.

Type d'article : Article, Article de la RIF

Résumé

The flow boiling heat transfer coefficient of the low-GWP (global warming potential) refrigerant HFO-1234yf inside a smooth small-diameter horizontal tube (inner diameter: 2 mm) was experimentally investigated. The local heat transfer coefficient was measured at heat fluxes of 6–24 kW/m2, mass fluxes of 100–400 kg/m2.s, an evaporating temperature of 288.15 K, and an inlet vapor quality of 0–0.25. The results show that the effect of heat flux on the heat transfer was large at low vapor quality, while the effect of mass flux was large at high vapor quality. The heat transfer coefficient of HFO-1234yf was almost the same as that of R134a. The heat transfer coefficients calculated based on correlations with Saitoh et al. agreed well with the measured values compared to other correlations. The measured pressure drop agreed well with that predicted by the Lockhart–Martinelli correlation.

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Pages : 1846-1853

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Détails

  • Titre original : Boiling heat transfer of HFO-1234yf flowing in a smooth small-diameter horizontal tube.
  • Identifiant de la fiche : 30002273
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 34 - n. 8
  • Date d'édition : 12/2011

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