AZEOTROPIC COMPOSITIONS OF HFO-1234YF AND PROPYLENE

1 . A thermal management system comprising,

(a) a contained binary HFO-1234yf/R-1270 (propylene) fluid with up to 23.8% by weight R-1270 comprising an HFO-1234yf stabilizer selected from one of d-limonene, alpha-pinene, and beta-pinene, and a POE lubricant,

(b) a closed circulation loop containing said contained fluid of “a”, said closed circulation loop including a plurality of flow sections connected to and in fluid communication with:

i) first and second series of heat exchangers,

ii) a pressure regulator,

iii) a valve for directing loop fluid to and through one of said plurality of flow sections to one of said first or second series of heat exchangers, and

(c) a valve branch-off line connected to a discharge end of one of said first and second series of heat exchangers, said branched-off comprising at least one heat exchanged arranged between a pair of regulators.

2 . A stabilized composition comprising:

(a) a binary HFO-1234yf/R-1270 (propylene) refrigerant, an HFO-1234yf stabilizer component selected from one of d-limonene, alpha-pinene, beta-pinene,

(b) optionally one of a leak and flame suppressant additive,

(c) a lubricating component having a kinematic viscosity at 40° C., between 75-110 cSt, and

wherein said R-1270 is present in an amount of up to 23.8 weight percent, said HFO-1234yf stabilizer component comprises from 0.01 up to 1 wt. % of one of d-limonene, alpha-pinene, beta-pinene and tocopherol, and said lubricating component comprises at least one polyol ester (POE), wherein binary HFO-1234yf/R-1270 refrigerant is soluble in the lubricant at temperatures over the range extending between about −35° C. and about 100° C.

3 . A thermal management system comprising,

(a) a binary HFO-1234yf/R-1270 (propylene) refrigerant, an HFO-1234yf stabilizer component selected from one of d-limonene, alpha-pinene, beta-pinene, optionally one of a leak and flame suppressant additive, a lubricating component having a kinematic viscosity at 40° C., between 75-110 cSt, and wherein said R-1270 is present in an amount of up to 23.8 weight percent, said HFO-1234yf stabilizer component comprises from 0.01 up to 1 wt. % of one of d-limonene, alpha-pinene, beta-pinene and tocopherol, and said lubricating component comprises at least one polyol ester (POE), wherein binary HFO-1234yf/R-1270 refrigerant is soluble in the lubricant at temperatures over the range extending between about 35° C. and about 100° C.

(b) a closed circulation loop containing said contained fluid of “a”, said closed circulation loop including a plurality of flow sections connected to and in fluid communication with:

i. first and second series of heat exchangers,

ii. a pressure regulator,

iii. a valve for directing loop fluid to and through one of said plurality of flow section to one of said first or second series of heat exchangers, and

(c) a valve branch-off line connected to a discharge end of one of said first and second series of heat exchangers, said branched-off comprising at least one heat exchanged arranged between a pair of regulators.

4 . The system of claim 3 wherein said first series of heat exchangers comprises serially arranged air/refrigerant and liquid/refrigerant heat exchangers wherein said refrigerant comprises said stabilized binary HFO-1234yf/R-1270 (propylene) fluid of “a”.

5 . The system of claim 3 wherein said second series of heat exchangers comprises serially arranged air/refrigerant and liquid/refrigerant heat exchangers wherein said refrigerant comprises said stabilized binary HFO-1234yf/R-1270 (propylene) fluid of “a”.

6 . The system of claim 3 wherein said first and second series of heat exchangers each comprise serially arranged air/refrigerant and liquid/refrigerant heat exchangers wherein said refrigerant comprises said stabilized binary HFO-1234yf/R-1270 (propylene) fluid of “a”.

7 . The composition of claim 2 , wherein the propylene (R-1270) is present in an amount of from 15 to 20 weight percent based on the total amount of the refrigerant component.

8 . The composition of claim 2 , wherein the heat capacity of the binary refrigerant is between 2.9% and 27.5% greater than the heat capacity of 2,3,3,3-tetrafluoropropene (HFO-1234yf) alone.

9 . The composition of claim 2 , wherein the heat capacity of the refrigerant component is between 2% and 22% greater than the heat capacity of 2,3,3,3-tetrafluoropropene (HFO-1234yf) alone.

10 . The composition of claim 2 , wherein the GWP of the refrigerant composition is less than 10.

11 . The composition of claim 2 , wherein the heat capacity ratio of the binary refrigerant and 2,3,3,3-tetrafluoropropene (HFO-1234yf) is between 1.05 and 1.50 at the same temperature and pressure.

12 . The composition of claim 2 , wherein the POE comprises an ester of a diol or a polyol.

13 . The system of claim 3 , wherein the propylene (R-1270) is present in an amount of from 15 to 20 weight percent based on the total amount of the refrigerant component.

14 . The system of claim 3 , wherein the heat capacity of the binary refrigerant is between 2.9% and 27.5% greater than the heat capacity of 2,3,3,3-tetrafluoropropene (HFO-1234yf) alone.

15 . The system of claim 3 , wherein the heat capacity of the refrigerant component is between 2% and 22% greater than the heat capacity of 2,3,3,3-tetrafluoropropene (HFO-1234yf) alone.

16 . The system of claim 3 , wherein the GWP of the refrigerant composition is less than 10.

17 . The system of claim 3 , wherein the heat capacity ratio of the binary refrigerant and 2,3,3,3-tetrafluoropropene (HFO-1234yf) is between 1.05 and 1.50 at the same temperature and pressure.

18 . The system of claim 3 , wherein the POE comprises an ester of a diol or a polyol.