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Measurement of thermophysical properties of low-viscous polyol ester lubricants in carbon dioxide, ethane and ethylene atmospheres.

Number: pap. n. 478

Author(s) : GÖPFERT T., THOMAS C., HESSE U.

Summary

With respect to the increasing ecological requirements on refrigerants and refrigerant mixtures new working fluids especially for temperature applications below 220 K are required. Especially low GWP refrigerants like ethane and ethylene and their binary mixtures with carbon dioxide can be interesting for specific applications were typically low-viscous lubricants are used. However the thermophysical properties of these lubricants with the mentioned refrigerants are often unknown. This paper shows the experimental results of the measurements of the saturation pressures, miscibility gaps, liquid phase densities, viscosities and interfacial tensions of nine different lubricant refrigerant mixtures. The results show differences especially in the saturation pressures and the form of the miscibility gaps for the investigated mixtures. For ternary mixtures the effect of refractionation of the refrigerant mixture inside the lubricant is shown by measuring the interfacial tension.

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Pages: 8

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Details

  • Original title: Measurement of thermophysical properties of low-viscous polyol ester lubricants in carbon dioxide, ethane and ethylene atmospheres.
  • Record ID : 30026371
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.0478

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