REFRIGERANT COMPOSITIONS COMPRISING R-32, R-134A, AND CF3I
The present application relates to compositions comprising difluoromethane (R-32), 1,1,1,2-tetrafluoroethane (R-134a), and trifluoroiodomethane (CF3I), that are useful in refrigeration, air conditioning, or heat pump systems. Methods of replacing a refrigerant selected from R-410A, R-22, and R-134a in refrigeration, air conditioning, or heat pump systems are also provided.
1 . A composition, comprising difluoromethane (R-32), 1,1,1,2-tetrafluoroethane (R-134a), and trifluoroiodomethane (CF 3 I), wherein the composition exhibits a GWP of from about 750 or less.
2 . The composition of claim 1 , wherein the composition exhibits a GWP of from about 300 to about 375.
3 . (canceled)
4 . The composition of claim 1 , wherein the composition comprises about 35 to about 44 weight percent difluoromethane (R-32).
5 . The composition of claim 1 , wherein the composition comprises about 1 to about 9 weight percent 1,1,1,2-tetrafluoroethane (R-134a).
6 . The composition of claim 1 , wherein the composition comprises about 51 to about 60 weight percent trifluoroiodomethane (CF 3 I).
7 . The composition of claim 1 , wherein the composition comprises:
about 35 to about 44 weight percent difluoromethane (R-32);
about 1 to about 9 weight percent 1,1,1,2-tetrafluoroethane (R-134a); and
about 51 to about 60 weight percent trifluoroiodomethane (CF 3 I).
8 . The composition of claim 1 , wherein the composition consists essentially of the difluoromethane (R-32), 1,1,1,2-tetrafluoroethane (R-134a), and trifluoroiodomethane (CF 3 I).
9 . The composition of claim 1 , wherein the composition exhibits a GWP of less than about 300.
10 . (canceled)
11 . (canceled)
12 . (canceled)
13 . (canceled)
14 . The composition of claim 1 , wherein the composition comprises:
about 34 to about 42 weight percent difluoromethane (R-32);
about 1 to about 4 weight percent 1,1,1,2-tetrafluoroethane (R-134a); and
about 57 to about 65 weight percent trifluoroiodomethane (CF 3 I).
15 . The composition of claim 1 , wherein the composition comprises about 40 weight percent difluoromethane (R-32), about 2 weight percent 1,1,1,2-tetrafluoroethane (R-134a), and about 58 weight percent trifluoroiodomethane (CF 3 I).
16 . A process for producing cooling, comprising condensing the composition of claim 1 and thereafter evaporating said composition in the vicinity of a body to be cooled.
17 . A process for producing heating, comprising evaporating the composition of claim 1 and thereafter condensing said composition in the vicinity of a body to be heated.
18 . A method of replacing R-410A in a refrigeration, air conditioning, or heat pump system, comprising providing the composition of claim 1 as replacement for said R 410A.
19 . (canceled)
20 . (canceled)
21 . The method of claim 18 , wherein the composition comprises:
about 35 to about 44 weight percent difluoromethane (R-32);
about 1 to about 9 weight percent 1,1,1,2-tetrafluoroethane (R-134a), and
about 51 to about 60 weight percent trifluoroiodomethane (CF 3 I).
22 . The method of claim 21 , wherein the composition exhibits a cooling capacity of within about ±10% to about ±20% of the cooling capacity of R-410A.
23 . The method of claim 21 , wherein the composition exhibits a cooling capacity of within about ±15% of the cooling capacity of R-410A.
24 . The method of claim 21 , wherein the composition exhibits a temperature glide of about 5° C. or less.
25 . (canceled)
26 . (canceled)
27 . The method of claim 18 , wherein the composition comprises:
about 34 to about 42 weight percent difluoromethane (R-32);
about 1 to about 4 weight percent 1,1,1,2-tetrafluoroethane (R-134a); and
about 57 to about 65 weight percent trifluoroiodomethane (CF3I).
28 . The method of claim 27 , wherein the composition exhibits a cooling capacity of within about ±10% to about ±20% of the cooling capacity of R-410A.
29 . (canceled)
30 . The method of claim 27 , wherein the composition exhibits a temperature glide of about 7° C. or less.
31 . An air conditioning system, heat pump system, or refrigeration system comprising the composition of claim 1 .
32 . (canceled)
33 . (canceled)