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Experimental study of convective heat transfer of R32-R134a inside horizontal microfin tubes.

[In Chinese. / En chinois.]

Author(s) : WU Z. G., MA H. G., CAI Z. H.

Type of article: Article

Summary

This article describes an experimental study on heat transfer in forced convective boiling of a nonazeotropic mixture of R32-R134a inside both smooth and microfin tubes with internal spiral grooves. The experimental results show that the microfin tubes have distinct performance advantages over the smooth tube under similar conditions. Considering the interaction effects among nucleation sites, secondary flow and capillary promotion, this article describes the enhanced mechanism for the microfin tubes, and the circumferential wall temperature variation of R32-R134a in the annular flow regime was observed and analysed for both smooth and microfin tubes, which arose through the composition concentration variation, gravity and secondary fluid used.

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Pages: 13-17

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Details

  • Original title: [In Chinese. / En chinois.]
  • Record ID : 2005-2476
  • Languages: Chinese
  • Source: Journal of Refrigeration - vol. 24 - n. 95
  • Publication date: 2003/09

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