Share

Systematic study of the solution properties of low global warming potential R-404A replacement refrigerant blends with various polyol ester lubricants.

Number: pap. 2274

Author(s) : HESSELL E., URREGO R.

Summary

This paper extends our previous investigations of refrigerant/lubricant property optimization to refrigerant blends; in particular, to nonflammable low global warming potential replacements for R-404A (GWP= 3952) with GWP < 1500. Solution phase behavior and solution property data are reported for R-449A/B and R-448A in combination with three POE lubricants of varied chemical structure, and corresponding varied solubility/miscibility with the refrigerant. When comparing refrigerant blends with a single lubricant, R-449A/B and R-448A gave a lower isobaric suction condition viscosity curve than R-404A; suggesting that these new refrigerant blends may give improved compressor energy efficiency at low operating temperatures. The results suggest that, although each polyol ester lubricant exhibits very different miscibility behavior in the refrigerant blends, the resulting solution viscosities at normal operating conditions is nearly identical for the isobaric suction curves. However, there were differences observed in the solution viscosities in the isobaric discharge condition curves. The overall conclusion is that there may be opportunities to improve frictional and wear performance through optimization of lubricant properties depending on compressor design and operating conditions. All three refrigerant blends can use the ISO 32 POE lubricants currently in use with R-404A without any detriment to performance or reliability.

Available documents

Format PDF

Pages: 9 p.

Available

  • Public price

    20 €

  • Member price*

    15 €

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Systematic study of the solution properties of low global warming potential R-404A replacement refrigerant blends with various polyol ester lubricants.
  • Record ID : 30018656
  • Languages: English
  • Source: 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2016/07/11

Links


See other articles from the proceedings (274)
See the conference proceedings

Indexing