Refrigeration compressor lubricant

A working fluid for a refrigeration system comprising a compressor, the working fluid comprising:

• an ester based lubricant comprising an additive selected from the group consisting of:
• diaryl sulfides, arylalkyl sulfides, dialkyl sulfides, diaryl disulfides, arylalkyl disulfides, dialkyl disulfides, diaryl polysulfides, arylalkyl polysulfides, dialkyl polysulfides, dithiocarbamates, derivatives of 2-mercaptobenzothiazole, derivatives of 2,5-dimercapto-1,3,4-thiadiazole, and combinations thereof, wherein the ester based lubricant is present at less than or equal to about 50% by weight of the working fluid;
• and
• a refrigerant selected from the group consisting of:
• difluoromethane (HFC-32), 3,3,3,-trifluoropropene (HFO-1234zf), 2,3,3,3,-tetrafluoropropene (HFO-1234yf), 1,2,3,3,-tetrafluoropropene (HFO-1234ze), propane, n-butane, isobutene, 2-methylbutane, n-pentane, and combinations thereof, wherein the refrigerant is present at greater than or equal to about 50% by weight of the working fluid.

A working fluid for a refrigeration system comprising a compressor, the working fluid consisting essentially of:

• an ester based lubricant comprising less than or equal to about 5% of an additive selected from the group consisting of:
• diaryl sulfides, arylalkyl sulfides, dialkyl sulfides, diaryl disulfides, arylalkyl disulfides, dialkyl disulfides, diaryl polysulfides, arylalkyl polysulfides, dialkyl polysulfides, dithiocarbamates, derivatives of 2-mercaptobenzothiazole, derivatives of 2,5-dimercapto-1,3,4-thiadiazole, and combinations thereof, wherein the ester based lubricant is present at less than or equal to about 50% by weight of the working fluid;
• and
• a refrigerant selected from the group consisting of:
• difluoromethane (HFC-32), 3,3,3,-trifluoropropene (HFO-1234zf), 2,3,3,3,-tetrafluoropropene (HFO-1234yf), 1,2,3,3,-tetrafluoropropene (HFO-1234ze), propane, n-butane, isobutene, 2-methylbutane, n-pentane, and combinations thereof, wherein the refrigerant is present at greater than or equal to about 50% by weight of the working fluid.