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Condensation heat transfer and pressure drop of R32/R1123 inside horizontal multiport extruded tubes.

Author(s) : JIGE D., MIKAJIRI N., KIKUCHI S., INOUE N.

Type of article: IJR article

Summary

The condensation heat transfer and frictional pressure drop characteristics of the zeotropic binary mixture R32/R1123 inside two horizontal multiport extruded tubes with different channel shapes were experimentally investigated. The experiments were conducted at a mass flux of 50–400 kgm-2s-1 and an average saturation temperature of 40 ℃. The effects of mass flux, quality, heat flux, and channel shape on the condensation heat transfer were quantified. The heat transfer coefficient and the frictional pressure drop of R32/R1123 were compared with those of pure R32 obtained using the same test multiport extruded tubes. The heat transfer coefficient of R32/R1123 was lower than that of R32 across all mass flux and quality conditions. The frictional pressure drop of R32/R1123 was 20–30% lower than that of R32 at the same mass flux and quality conditions. The correlations of previous studies agreed well with the obtained frictional pressure drop of R32/R1123, with a mean deviation of 17%. The obtained heat transfer coefficient of R32/R1123 was predictable with a mean deviation of -5.2% using the previous correlations proposed for multiport extruded tubes considering the heat transfer reduction due to the thermal resistance caused by temperature glide.

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Pages: 200-228

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Details

  • Original title: Condensation heat transfer and pressure drop of R32/R1123 inside horizontal multiport extruded tubes.
  • Record ID : 30027873
  • Languages: English
  • Subject: Technology, HFCs alternatives
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 120
  • Publication date: 2020/12
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2020.08.029
  • Document available for consultation in the library of the IIR headquarters only.

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