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Some observations of foaming characteristics in the nucleate boiling performance of refrigerant-oil mixtures.

Author(s) : WANG C. C., LIN Y. T., CHUNG H. D., et al.

Summary

The lubricant oil used in the investigation includes 3GS and 5GS, and the working refrigerant is R22. Experiments were conducted in a smooth tube at saturation temperatures of -5, 4.4 and 20 °C. The heat transfer coefficients decrease with increase of oil concentrations at Ts equal to 20 °C. Conversely, for Ts equal to -5 °C, the heat transfer coefficients may be larger than those of pure refrigerants at low oil concentration, possibly because of surface tension, and foaming characteristics.

Details

  • Original title: Some observations of foaming characteristics in the nucleate boiling performance of refrigerant-oil mixtures.
  • Record ID : 2000-1722
  • Languages: English
  • Source: ASHRAE Transactions. 1999 Winter Meeting, Chicago, Illinois + CD-ROM.
  • Publication date: 1999
  • Document available for consultation in the library of the IIR headquarters only.

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