STABILIZED HEAT TRANSFER COMPOSITIONS, METHODS AND SYSTEMS

1 . A heat transfer compositions comprising refrigerant, lubricant and stabilizer, said refrigerant comprising from about 5% by weight to 100% by weight of trifluoroiodomethane (CF 3 I), said lubricant comprising polyol ester (POE) lubricant and/or polyvinyl ether (PVE) lubricant, and said stabilizer comprising alkylated naphthalene, wherein said alkylated naphthalene is present in the composition in an amount of from 1% to less than 10% by weight based on the weight of the alkylated naphthalene and the lubricant.

2 . The heat transfer composition of claim 1 wherein said alkylated naphthalene is present in the composition in an amount of from 1% to 8% by weight based on the weight of the alkylated naphthalene and the lubricant.

3 . The heat transfer composition of claim 1 wherein said alkylated naphthalene is present in the composition in an amount of from 1.5% to 8% by weight based on the weight of the alkylated naphthalene and the lubricant.

4 . The heat transfer composition of claim 1 wherein said alkylated naphthalene is present in the composition in an amount of from 1.5% to 6% by weight based on the weight of the alkylated naphthalene and the lubricant.

5 . The heat transfer composition of claim 4 wherein said stabilizer further comprises an acid depleting moiety (ADM).

6 . The heat transfer composition of claim 5 wherein said stabilizer comprises from about 50% by weight to about 99.9% of alkylated naphthalenes and from 0.05% to about 50% by weight of ADM based on the weight of the stabilizer.

7 . The heat transfer composition of claim 6 wherein said stabilizer comprises from about 40% by weight to about 99% of alkylated naphthalenes and from 1% to about 20% by weight of ADM based on the weight of the stabilizer.

8 . The heat transfer composition of claim 7 wherein said alkylated naphthalene comprises AN5 and where said ADM comprises ADM4.

9 . The heat transfer composition of claim 8 wherein said alkylated naphthalenes consists essentially of AN5 and where said ADM consists essentially of ADM4.

10 . The heat transfer composition of claim 9 wherein said stabilizer further comprises a phenol.

11 . The heat transfer composition of claim 9 wherein said phenol comprises BHT.

12 . A stabilized heat transfer composition comprising: (a) a lubricant selected from POE lubricant and PVE lubricant; and (b) a stabilizer comprising from about 50% by weight to about 99.9% of alkylated naphthalene based on the weight of the stabilizer.

13 . The stabilized heat transfer composition of claim 12 wherein said lubricant comprises POE lubricant having a viscosity at 40° C. measured in accordance with ASTM D445 of from about 30 cSt to about 70 cSt.

14 . The stabilized heat transfer composition of claim 12 wherein said lubricant comprises neopentyl POE lubricant having a viscosity at 40° C. measured in accordance with ASTM D445 of from about 30 cSt to about 70 cSt.

15 . The stabilized heat transfer composition of claim 12 wherein said stabilizer further comprises from 0.05% to about 50% by weight of ADM based on the weight of the stabilizer.

16 . The stabilized heat transfer composition of claim 15 wherein said alkylated naphthalenes consists essentially of AN5 and where said ADM consists essentially of ADM4.

17 . The stabilized heat transfer composition of claim 16 wherein said stabilizer further comprises BHT.

18 . The stabilized heat transfer composition of claim 15 wherein said alkylated naphthalenes consists essentially of AN10 and where said ADM consists essentially of ADM4.

19 . The stabilized heat transfer composition of claim 18 wherein said stabilizer further comprises BHT.

20 . The stabilized heat transfer composition of claim 16 wherein said alkylated naphthalenes consists of AN5.