Methods and apparatus using refrigerant compositions comprising refrigerant and lubricant comprising perfluoropolyether and non-fluorinated lubricant

Abstract

Disclosed herein is a method to improve miscibility in refrigeration, air conditioning, heat pump or power cycle systems comprising charging a refrigeration, air conditioning or heat pump system with a refrigerant composition; wherein the refrigerant composition comprises at least one refrigerant and a lubricant comprising at least one perfluoropolyether and at least one non-fluorinated lubricant, provided that the refrigerant composition has no more than two liquid phases over the range of the composition and over a range of temperature from about −40° C. to about +60° C. Also disclosed is a refrigeration, air conditioning, heat pump, or power cycle system containing said refrigerant composition.

Dependencies are inferred from the claim text.