Compositions containing fluorine substituted olefins
Disclosed are heat transfer compositions, and methods of using and selecting heat transfer compositions, in which the composition comprises a first component comprising difluoromethane (R-32), and at least one second component selected from group consisting of CF3I, 1,2,3,3,3-pentafluoropropene (HFO 1225ye), and combinations of these, and optionally, but preferably, at least one third component selected from the group consisting of fluorinated C2-C3 compounds, including any combination of two or more fluorinated C2-C3 compounds.
1 . A heat transfer composition comprising:
(a) a first component comprising difluoromethane (R-32);
(b) a second component selected from group consisting of CF 3 I, 1,2,3,3,3-pentafluoropropene (HFO-1225), and combinations of these;
(c) and optionally at least one third component selected from the group consisting of fluorinated C2-C3 compounds.
2 . The heat transfer composition of claim 1 wherein said second component is a flammability reducing agent.
3 . The heat transfer composition of claim 1 wherein said third component is present and is selected from the group consisting of fluorinated ethanes, fluorinated alkenes, and combinations of any two or more of these.
4 . The heat transfer composition of claim 3 wherein said third component is selected from the group consisting of monofluoroethane (HFC-161), difluoroethane (HFC-152a), trifluoroethane (HFC-143a), 1,1,1,2-tetrafluoroethane (HFC-134a), pentafluoroethane (HFC-125), at least one fluoroalkene of Formula I:
where each R is independently Cl, F, Br, I or H
R′ is (CR 2 ) n Y,
Y is CRF 2
and n is 0 or 1, and combinations of any two or more of these.
5 . The heat transfer composition of claim 4 wherein Y is CF 3 .
6 . The heat transfer composition of claim 5 wherein at least one R on the unsaturated terminal carbon is H.
7 . The heat transfer composition of claim 6 wherein n is 0.
8 . The heat transfer composition of claim 4 wherein Y is CF 3 and n is 0.
9 . The heat transfer composition of claim 3 wherein said at least one fluoroalkene comprises at least one tetrafluoropropene (HFO-1234).
11 . The heat transfer composition of claim 9 wherein said at least one tetrafluoropropene is HFO-1234ze.
12 . The heat transfer composition of claim 1 wherein said first component, said second component and said third component, when present, are present in amounts effective to provide the heat transfer composition with a capacity that is not substantially less than the capacity in low temperature applications of at of at least one of R-22, R-404A, R-407C, R-410A, or R-507, and combinations of any two or more of these.
13 . The heat transfer composition of claim 1 wherein said first component, said second component and said third component, when present, are present in amounts effective to provide the heat transfer composition with a capacity that is not substantially less than the capacity in medium temperature applications of at least one of R-22, R-404A, R-407C, R-410A, or R-507, and combinations of any two or more of these.
14 . A method of transferring heat to or from a fluid or body comprising causing a phase change in a composition of claim 1 and exchanging heat with said fluid or body during said phase change.
15 . The method according to claim 12 wherein said HFO-1234ze comprises at least about 90% by weight trans-1,3,3,3-tetrafluoropropene (transHFO-1234ze).
16 . The method according to claim 12 wherein said HFO-1234ze comprises at least about 95% by weight trans-1,3,3,3-tetrafluoropropene (transHFO-1234ze).
17 . The method according to claim 12 wherein said HFO-1234ze comprises at least about 97% by weight trans-1,3,3,3-tetrafluoropropene (transHFO-1234ze).
18 . A refrigeration system comprising a heat transfer composition of claim 1 .
19 . The refrigeration system of claim 18 selected from the group consisting of automotive air conditioning systems, residential air conditioning systems, commercial air conditioning systems, residential refrigerator systems, residential freezer systems, commercial refrigerator systems, commercial freezer systems, chiller air conditioning systems, chiller refrigeration systems, heat pump systems, and combinations of two or more of these.
20 . A method of selecting a composition for use in an existing heat transfer system, the method comprising:
a) analyzing the existing heat transfer system in a manner sufficient to permit approximation of the capacity of the fluid used in the existing heat transfer system;
b) approximating the capacity of two or more heat transfer compositions, said two or more compositions comprising:
(i) a first component comprising difluoromethane (R-32);
(ii) a second component selected from group consisting of CF 3 I, 1,2,3,3,3-pentafluoropropene (HFO-1225), and combinations of these;
(iii) and optionally at least one third component selected from the group consisting of fluorinated C2-C3 compounds; and
c) selecting at least one of said two or more of heat transfer compositions for use in the existing heat transfer system.