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Development of miscibility improved oil for R32.

Number: pap. 1316

Author(s) : MIZUTANI Y., OKIDO T., SHONO Y., et al.

Summary

R32 is widely used as a refrigerant for air-conditioners. R32 is known to have lower miscibility with refrigeration oils than do other refrigerants such as HFCs and HFOs. Moreover, when R32 is dissolved in refrigeration oils, the kinematic viscosity of the oil drops sharply. This has made it difficult to develop oils with improved miscibility with R32 that don't suffer from these drops in kinematic viscosity. Our work has shown that the addition of a new base material to POE improves miscibility with R32 while reducing the drop in kinematic viscosity that occurs when R32 is dissolved in it. Using this technology, we have developed new refrigeration oils whose critical solution temperatures were -20°C or below under R32 atmosphere. In addition, the kinematic viscosities of the new oils when R32 is dissolved in them were equal to or greater than those of POE oils currently used for R410A. These new refrigeration oils could potentially be used in large scale refrigeration systems, in which good oil-return is a key concern. In this study, we report our test methods and various characteristics of the oils under R32.

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Pages: 7

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Details

  • Original title: Development of miscibility improved oil for R32.
  • Record ID : 30024295
  • Languages: English
  • Source: 2018 Purdue Conferences. 24th International Compressor Engineering Conference at Purdue.
  • Publication date: 2018/07/09

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