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Some observations of the two-phase flow characteristics of R125 and R407C within a 3-mm diameter tube.

Author(s) : YANG K. S., CHEN I. Y., HU R., et al.

Summary

Two-phase flow pattern and the frictional characteristics of refrigerants R407C and R125 inside a 3-mm-diameter tube are reported. Tests were performed with a mass flux in the range of about 300-1000 kg/m2.s. It is found that the development of flow pattern for R125 is at a lower vapour velocity than that of R407C, due to its larger vapour density. A modified flow-regime map applicable for a 3-mm-diameter tube is developed. Test results of the frictional pressure gradient are compared with several empirical correlations.

Details

  • Original title: Some observations of the two-phase flow characteristics of R125 and R407C within a 3-mm diameter tube.
  • Record ID : 2004-0129
  • Languages: English
  • Source: ASHRAE Transactions. 2002 annual Meeting, Honolulu, Hawaii. Volume 108, part 2 + CD-ROM.
  • Publication date: 2002

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