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Experimental study of foam formation during refrigerant desorption from a R134a/polyolester lubricating oil mixture.

Author(s) : BECERRA E. C. V., PARISE J. A. R.

Summary

Foam formation is an important issue affecting hermetic compressors during start-up. In such conditions, liquid oil can be drawn into the cylinder, causing deterioration in the performance. Information on the phenomenon is scarce, which led to an effort of reproducing it at laboratory conditions. A saturated mixture of R134a and polyolester lubricating oil, at a given pressure, was submitted to controlled depressurisation. The foam formation process (boiling and foaming incipience, as well as liquid level and foaming height) was evaluated with the help of a digital video camera. A number of runs were carried out, for different pressure drop rates and initial refrigerant concentrations.

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Details

  • Original title: Experimental study of foam formation during refrigerant desorption from a R134a/polyolester lubricating oil mixture.
  • Record ID : 2004-2778
  • Languages: English
  • Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
  • Publication date: 2003/08/17

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