Low GWP heat transfer compositions

Patent metadata

Field	Value
Publication number	US-10035937-B2
Application number	US-201514703128-A
Country	US
Kind code	B2
Filing date	May 4, 2015
Priority date	May 5, 2014
Publication date	Jul 31, 2018
Grant date	Jul 31, 2018

Abstract

The present invention relates, in part, to heat transfer compositions, methods, and uses thereof that include (a) from about 17% to about 40% by weight of HFC-32; (b) from about 51% to about 83% by weight of a tetrafluoropropene; and (c) from greater than about 0% to less than about 9% by weight of CO2. The amount of component (c) improves one or more of a capacity, efficiency, discharge temperature, discharge pressure, and/or energy consumption of the composition, particularly in a low or medium temperature refrigeration system and as compared to composition lacking component (c) and/or the refrigerant R-404A.

First claim

What is claimed is:

1. A heat transfer composition comprising a refrigerant consisting essentially of:
(a) about 21.5% weight of HFC-32;
(b) about 75.5% by weight of 2,3,3,3-tetrafluoropropene; and
(c) from 2% to 4% by weight of CO2,

provided that the amount of component (c) is effective to improve one or more of a capacity, efficiency, discharge temperature, discharge pressure, or energy consumption of the composition in a low or medium temperature refrigeration system, as compared to composition lacking component (c).

2. The heat transfer composition of claim 1 , wherein said refrigerant comprises about 3% by weight of CO2.

3. The heat transfer composition of claim 2 , wherein the composition exhibits a capacity of from greater than or equal to 97% to less than or equal to about 100% of the capacity of R-404A in the same low and/or medium temperature refrigeration system and under the same conditions.

4. The heat transfer composition of claim 2 , wherein the composition exhibits an efficiency that is not less than the efficiency of a composition consisting essentially of about 21.5% weight of HFC-32, about 75.5% by weight of 2,3,3,3-tetrafluoropropene and no CO2 in the same low and/or medium temperature refrigeration system and under the same conditions.

5. The heat transfer composition of claim 2 , wherein the composition exhibits an efficiency of at least 100% of the efficiency of R-404A in the same low and/or medium temperature refrigeration system and under the same conditions.

6. The heat transfer composition of claim 2 , wherein the composition exhibits a high-side discharge pressure of from greater than or equal to about 85% to less than or equal to about 115% of the discharge pressure of R-404A in the same low and/or medium temperature refrigeration system and under the same conditions.

7. The heat transfer composition of claim 2 , wherein the composition exhibits a high-side discharge pressure of from greater than or equal to about 90% to less than or equal to about 110% of the discharge pressure of R-404A in the same low and/or medium temperature refrigeration system and under the same conditions.

8. The heat transfer composition of claim 2 , wherein the composition exhibits a high-side discharge pressure of from greater than or equal to about 95% to less than or equal to about 105% of the discharge pressure of R-404A in the same low and/or medium temperature refrigeration system and under the same conditions.

9. The heat transfer composition of claim 2 , wherein the composition exhibits a high-side discharge temperature of no more than 15° C. greater than the discharge temperature of R-404A in the same low and/or medium temperature refrigeration system and under the same conditions.

10. The heat transfer composition of claim 2 , wherein the composition exhibits a high-side discharge temperature of no more than 10° C. greater than the discharge temperature of R-404A in the same low and/or medium temperature refrigeration system and under the same conditions.

11. The heat transfer composition of claim 2 , wherein the composition exhibits a high-side discharge temperature of no more than 5° C. greater than the discharge temperature of R-404A in the same low and/or medium temperature refrigeration system and under the same conditions.

12. The heat transfer composition of claim 2 , further comprising a lubricant.

13. The heat transfer composition of claim 12 , wherein the lubricant comprises a polyolester oil.

14. A method of replacing an existing heat transfer fluid contained in low or medium temperature refrigeration system comprising removing at least a portion of said existing heat transfer fluid from said system, said existing heat transfer fluid comprising HFC-404A, and replacing at least a portion of said existing heat transfer fluid by introducing into said system a heat transfer composition of claim 2 .

15. A heat transfer system comprising a compressor, a condenser and an evaporator in fluid communication, and a heat transfer composition in said system, said heat transfer composition comprising the composition of claim 2 .

16. The heat transfer system of claim 15 wherein said heat transfer system is a low or medium temperature refrigeration system.

17. A heat transfer composition comprising a refrigerant consisting essentially of:
(a) about 21.5% weight of HFC-32;
(b) about 75.5% by weight of 2,3,3,3-tetrafluoropropene; and
(c) from 2% to 4% by weight of CO2.

18. The heat transfer composition of claim 17 , wherein said refrigerant comprises about 3% by weight of CO2.

19. The heat transfer composition of claim 18 , wherein the composition exhibits a capacity of from greater than or equal to 97% to less than or equal to about 100% of the capacity of R-404A under temperature refrigeration conditions.

20. The heat transfer composition of claim 18 , wherein the composition exhibits a capacity of from greater than or equal to 97% to less than or equal to about 100% of the capacity of R-404A under medium temperature refrigeration conditions.

Assignees

• Honeywell Int Inc

Inventors

• Yana Motta Samuel F
• Pottker Gustavo
• Spatz Mark W

Classifications

• C09K2205/40

  Replacement mixtures · CPC title

• C09K2205/106

  Carbon dioxide · CPC title

• C09K2205/126

  Unsaturated fluorinated hydrocarbons · CPC title

• C09K5/045 Primary

  containing only fluorine as halogen · CPC title

• C09K2205/22

  All components of a mixture being fluoro compounds · CPC title