Refrigerant mixtures comprising tetrafluoropropene, difluoromethane, pentafluoroethane, and tetrafluoroethane, and uses thereof
View Patent ↗A non-flammable refrigerant mixture is disclosed. The non-flammable refrigerant mixture may include from 20 weight percent to 25.5 weight percent HFO-1234yf, (b) from 20 weight percent to 24.5 weight percent HFC-32, (c) from 24.5 weight percent to 30 weight percent HFC-125, (d) from 25.5 weight percent to 30 weight percent HFC-134a, and optionally (e) from about 0.0001 weight percent to 10 weight percent trans-HFO-1234ze. These refrigerant mixtures are useful as components in compositions also containing non-refrigerant components (e.g., lubricants), in processes to produce cooling, in methods for replacing refrigerants R-404A, R-507, R-407A, R-407C, R-407F and/or R-22, and in refrigeration apparatuses.
1. A heat transfer system comprising:
an evaporator that operates at a temperature from about −15° C. to about 0° C.; and
a heat transfer fluid comprising a refrigerant consisting of:
24.3 weight % difluoromethane;
24.7 weight % pentafluoroethane;
25.7 weight % 1,1,1,2-tetrafluoroethane; and
25.3 weight % 2,3,3,3-tetrafluoropropene;
wherein said refrigerant is classified by ASHRAE as non-flammable; and
wherein said heat transfer system is a refrigeration system designed for use with the at least one of R-407A, R-407F, or R-22.
2. The heat transfer system of claim 1 further comprising an expansion device designed for use with at least one of R-407A, R-407F, or R-22.
3. The heat transfer system of claim 1 further comprising a compressor having a discharge temperature that is lower than an R-22 discharge temperature that results at the compressor when the heat transfer system is charged with an R-22 refrigerant.
4. The heat transfer system of claim 1 , wherein the composition further comprises a non-refrigerant component.
5. The heat transfer system of claim 4 , wherein the non-refrigerant component comprises at least one of a lubricant, dye, solubilizing agent, compatibilizer, stabilizer, tracer, perfluoropolyether, anti-wear agent, extreme pressure agent, corrosion and oxidation inhibitor, metal surface energy reducer, metal surface deactivator, free radical scavenger, foam control agent, viscosity index improver, pour point depressant, detergent, or viscosity adjuster.
6. The heat transfer system of claim 5 , wherein the non-refrigerant component is the lubricant, the lubricant comprising at least one of a mineral oil, alkyl substituted aromatic, alkylbenzene, synthetic paraffin and naphthene, poly (alpha olefin), polyglycol, polyalkylene glycol, dibasic acid ester, polyester, polyol ester, neopentyl ester, polyvinyl ether, perfluoropolyether, silicone, silicate ester, fluorinated compound, phosphate ester, or polycarbonate.
7. The heat transfer system of claim 1 , wherein the refrigeration system further comprises an expansion device designed for use with R22, R-407A or R-407F.
8. A method of replacing an R-22 refrigerant in a heat transfer system that was designed for use with the R-22 refrigerant, the method comprising:
charging the heat transfer system that was designed for use with the R-22 refrigerant with a composition comprising a refrigerant consisting of:
24.3 weight % difluoromethane;
24.7 weight % pentafluoroethane;
25.7 weight % 1,1,1,2-tetrafluoroethane; and
25.3 weight % 2,3,3,3-tetrafluoropropene; wherein said refrigerant is classified by ASHRAE as non-flammable; and wherein said heat transfer system comprises an evaporator operating at a temperature from −15° C. to 0° C.
9. The method of claim 8 , further comprising compressing the composition at a compressor of the heat transfer system, wherein the compressor is associated with a discharge temperature that is lower than an R-22 discharge temperature that results when the heat transfer system is charged with the R-22 refrigerant.
10. The method of claim 8 , wherein the composition further comprises a non-refrigerant component.
11. The method of claim 10 , wherein the non-refrigerant component comprises at least one of a lubricant, dye, solubilizing agent, compatibilizer, stabilizer, tracer, perfluoropolyether, anti-wear agent, extreme pressure agent, corrosion and oxidation inhibitor, metal surface energy reducer, metal surface deactivator, free radical scavenger, foam control agent, viscosity index improver, pour point depressant, detergent, or viscosity adjuster.
12. The method of claim 11 , wherein the non-refrigerant component is the lubricant, the lubricant comprising at least one of a mineral oil, alkyl substituted aromatic, alkylbenzene, synthetic paraffin and naphthene, poly (alpha olefin), polyglycol, polyalkylene glycol, dibasic acid ester, polyester, polyol ester, neopentyl ester, polyvinyl ether, perfluoropolyether, silicone, silicate ester, fluorinated compound, phosphate ester, or polycarbonate.
13. The method of claim 8 , wherein said heat transfer system further comprises an expansion device designed for use with R22.
14. A method of replacing R-407A or R-407F refrigerant in a heat transfer system that was designed for use with the R-407A or R-407F refrigerant, the method comprising:
charging the heat transfer system that was designed for use with the R-22 refrigerant with a composition comprising a refrigerant consisting of:
24.3 weight % difluoromethane;
24.7 weight % pentafluoroethane;
25.7 weight % 1,1,1,2-tetrafluoroethane; and
25.3 weight % 2,3,3,3-tetrafluoropropene; wherein said refrigerant is classified by ASHRAE as non-flammable; and wherein said heat transfer system comprises an evaporator operating at a temperature from −15° C. to 0° C.
15. The method of claim 14 , wherein the composition further comprises a non-refrigerant component.
16. The method of claim 15 , wherein the non-refrigerant component comprises at least one of a lubricant, dye, solubilizing agent, compatibilizer, stabilizer, tracer, perfluoropolyether, anti-wear agent, extreme pressure agent, corrosion and oxidation inhibitor, metal surface energy reducer, metal surface deactivator, free radical scavenger, foam control agent, viscosity index improver, pour point depressant, detergent, or viscosity adjuster.
17. The method of claim 16 , wherein the non-refrigerant component is the lubricant, the lubricant comprising at least one of a mineral oil, alkyl substituted aromatic, alkylbenzene, synthetic paraffin and naphthene, poly (alpha olefin), polyglycol, polyalkylene glycol, dibasic acid ester, polyester, polyol ester, neopentyl ester, polyvinyl ether, perfluoropolyether, silicone, silicate ester, fluorinated compound, phosphate ester, or polycarbonate.
18. The heat transfer system of claim 14 , wherein the refrigeration system further comprises an expansion device designed for use with R-407A or R-407F.