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Numerical simulation of heat transfer performance of R410A in condensing-superheated zone.

Author(s) : ZHANG L., LIU J., XU X.

Type of article: IJR article

Summary

The heat transfer process in the condenser is often divided into superheated, two-phase and subcooled zone. But the three-zone model has discontinuities of the heat transfer coefficient between single phase and two-phase regions. This study applies a computational fluid dynamics (CFD) study on the two phase flow and the heat transfer characteristics in the condensing-superheated zone. The condensation process of R410A (Tsat=44.59°C) in a horizontal pipe (Di=6.1 mm) is simulated by using VOF (volume of fluid) model. The formation and the development of the condensation film are detailed analyzed. The heat transfer mechanism in the condensing-superheated zone includes both the single-phase convection and the phase transition. The heat transfer coefficient in the superheated condensation area increases from the single-phase convection to the saturated condensation. Combined with the development of liquid film morphology, this study is helpful for understanding the flow and heat transfer mechanism in the condensing-superheated zone.

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Pages: 206-217

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Details

  • Original title: Numerical simulation of heat transfer performance of R410A in condensing-superheated zone.
  • Record ID : 30028529
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 128
  • Publication date: 2021/08
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2021.03.019
  • Document available for consultation in the library of the IIR headquarters only.

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