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How changes in lubricant can address challenges associated with hydrocarbon refrigerants high temperature heat pumps (HTHP).

Number: 0628

Author(s) : MUÑOZ ALONSO M., KARNAZ J., DIXON L., LIU J.

Summary

The knowledge of lubricant-refrigerant interactions is crucial to understand the behavior of a real working system. The greater the affinity between refrigerant and lubricant, the higher the temperature, or the greater the pressure, all of them reduce the working viscosity available during operation. An increase in the viscosity grade may compensate, but there are also operational high viscosity limits.
The behavior of lubricant-refrigerant pairs will be described in the oil sump in an alternative compressor, and the oil reservoir in a screw compressor. How different operational conditions influence differences in oil behavior and in oil selection, to provide the right viscosity at the right condition. All explanations will be illustrated with real products and working conditions, with data extracted from PVT charts obtained by direct measurement.

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Pages: 8

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Details

  • Original title: How changes in lubricant can address challenges associated with hydrocarbon refrigerants high temperature heat pumps (HTHP).
  • Record ID : 30033315
  • Languages: English
  • Source: 11th IIR Conference on Compressors and Refrigerants.
  • Publication date: 2024/09
  • DOI: http://dx.doi.org/10.18462/iir.compr.2021.0628

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