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Flow-boiling of R22, R134a, R507, R404A and R410A inside a smooth horizontal tube.

Author(s) : GRECO A., VANOLI G. P.

Type of article: Article, IJR article

Summary

Flow boiling heat transfer coefficients of R22, R134a, R507, R404A and R410A inside a smooth horizontal tube (6 mm ID, 6 m length) were measured at a refrigerant mass flux of about 360 kg/m2.s varying the evaporating pressure within the range 3-12 bar, with heat fluxes within the range 11-21 kW/m2. The experimental data are discussed in terms of the heat transfer coefficients as a function of the vapour quality. The experimental results clearly show that the heat transfer coefficients of R134a are always higher than those pertaining to R22 (from a minimum of +6 to a maximum of +45%).

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Pages: 872-880

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Details

  • Original title: Flow-boiling of R22, R134a, R507, R404A and R410A inside a smooth horizontal tube.
  • Record ID : 2005-2450
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 28 - n. 6
  • Publication date: 2005/09

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