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Development of POE with improved low-temperature fluidity.

Number: 1363

Author(s) : GOTO S., TAKAKI T., SAKURABA T.

Summary

Heat pumps have recently become popular as a means of heating in cold regions. When refrigerant is discharged from the compressor, a small amount of oil is also discharged. Assuming operation in cold regions, oil retention in the components due to the high viscosity can lead to a compressor failure and a decrease in efficiency. To solve these problems, we developed POE refrigeration oils that exhibit excellent low-temperature fluidity as a refrigerant-oil mixture. This paper presents results from a measurement of refrigerant-oil mixture’s kinematic viscosity at low temperature and an estimation of pressure drop in suction line. R32, which is currently utilized for room air conditioners, and R454B, which is regarded as the major replacement to R32, were selected as refrigerants. Kinematic viscosities of refrigerant-developed POE oil mixtures at -20℃ were reduced by modifying the solubility of refrigerant in oil with the selection of fatty acid. Additionally, estimated pressure drops of the refrigerant gas with developed oils were decreased.

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  • Original title: Development of POE with improved low-temperature fluidity.
  • Record ID : 30033606
  • Languages: English
  • Subject: Technology
  • Source: 2024 Purdue Conferences. 27th International Compressor Engineering Conference at Purdue.
  • Publication date: 2024/07/18

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