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Thermo- and fluid dynamics of lubricants with CO2 at transcritical conditions.

Thermo- und Fluiddynamik von Schmierstoffen mit CO2 bei transkritischen Bedingungen.

Author(s) : HAUK A., FAHL J., WEIDNER E.

Type of article: Article

Summary

While fluorinated hydrocarbons such as HFCs in cooling circuits are in the subcritical state, carbon dioxide is both sub- and supercritical with respect to pressure and temperature. The viscosity decrease caused by the solubility of CO2 in lubricants under high pressure might cause wear in a compressor. For the proper design and operation of refrigeration circuits, knowledge of phase behaviour and viscosity behaviour of lubricants with CO2 is essential. Results of basic investigations on three different synthetic lubricants exhibiting different types of phase behaviour with CO2, are presented and discussed with respect to typical operating conditions.

Details

  • Original title: Thermo- und Fluiddynamik von Schmierstoffen mit CO2 bei transkritischen Bedingungen.
  • Record ID : 2001-2648
  • Languages: German
  • Source: KI Luft Kältetech. - n. 1
  • Publication date: 2001/01
  • Document available for consultation in the library of the IIR headquarters only.

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