초록

Disclosed are methods of transferring heat to or from a fluid or body comprising causing heat to be transferred to or from a composition comprising at least trans-1,3,3,3-tetrafluorpropene.

대표청구항 ▼

1. A method of transferring heat to or from a body in a vapor compression system comprising: (a) providing in at least a portion of said system a heat transfer composition comprising at least about 5% by weight of trans-1,3,3,3-tetrafluoropropene and lubricant comprising polyol ester; and(b) causing

1. A method of transferring heat to or from a body in a vapor compression system comprising: (a) providing in at least a portion of said system a heat transfer composition comprising at least about 5% by weight of trans-1,3,3,3-tetrafluoropropene and lubricant comprising polyol ester; and(b) causing heat to be transferred to or from trans-1,3,3,3-tetrafluoropropene and into or from said body by heat transfer contact between said trans-1,3,3,3-tetrafluoropropene and the body. 2. The method of claim 1 wherein said composition comprises at least about 90% by weight of trans-1,3,3,3-tetrafluoropropene. 3. The method of claim 1 wherein said composition comprises from about 5% by weight to about 99% by weight of said trans-1,3,3,3-tetrafluoropropene. 4. The method of claim 1 wherein said composition comprises from about 5% by weight to about 95% by weight of said trans-1,3,3,3-tetrafluoropropene. 5. The method of claim 1 wherein said lubricant is present in the composition in an amount of from about 30 to about 50 percent by weight of the composition. 6. The method of claim 1 wherein said composition further comprises at least one co-heat transfer agent. 7. The method of claim 6 wherein said co-heat transfer agent is selected from the group consisting of: trichlorofluoromethane (CFC-11); dichlorodifluoromethane (CFC-12); difluoromethane (HFC-32); pentafluoroethane (HFC- 125);1,1,2,2-tetrafluoroethane (HFC-134);1,1,1,2-tetrafluoroethane (HFC-134a); difluoroethane (HFC-152a); 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea); 1,1,1,3,3,3-hexafluoropropane (HFC-236fa); 1,1,1,3,3-pentafluoropropane (HFC-245fa); 1,1,1,3,3-pentafluorobutane (HFC-365mfc); CO2 and combinations of two or more of these. 8. The method of claim 1 wherein said lubricant has a degree of miscibility with said trans-1,3,3,3-tetrafluoropropene so that when up to five weight percent of lubricant is added to said trans-1,3,3,3-tetrafluoropropene the mixture has one liquid phase at at least one temperature between −50 and +70° C. 9. A method of cooling a body in a heat transfer system by transferring heat from the body to at least a portion of a heat transfer fluid contained in the system, the method comprising; (a) providing in the system a heat transfer fluid comprising at least about 5% by weight of trans-1,3,3,3-tetrafluoropropene and from about 30by weight to about 50% by weight of polyol ester lubricant, wherein in at least a portion of said system said trans-1,3,3,3-tetrafluoropropene is in a gas phase at a first pressure and at a first temperature;(b) removing heat from said trans-1,3,3,3-tetrafluoropropene provided at said first temperature by condensing at least a portion of said trans-1,3,3,3-tetrafluoropropene to produce at least a portion of said heat transfer fluid in a liquid phase at about said first pressure;(c) reducing the pressure of at least a portion of said liquid heat transfer fluid from step (b) to produce a heat transfer fluid at a second temperature substantially below said first temperature and a second pressure substantially below said first pressure;(d) cooling the body by bringing said body into heat transfer contact with said heat transfer fluid at about said second temperature produced in step (c); and(e) providing at least a portion of said fluid at said first pressure in said step (a) by compressing said heat transfer fluid provided in step (d) from about said second pressure to about said first pressure. 10. The method of claim 9 wherein said heat transfer contact of step (d) comprises evaporating at least a portion of said heat transfer fluid. 11. A chiller system using the method of claim 9. 12. A method of cooling a body by transferring heat from the body to a heat transfer fluid, the method comprising; (a) providing a heat transfer fluid comprising at least about 5% by weight of trans-1,3,3,3-tetrafluoropropene and polyol ester lubricant;(b) compressing at least a portion of said heat transfer fluid to produce a heat transfer fluid comprising at least a portion of said trans-1,3,3,3-tetrafluoropropene at a first pressure and at a first temperature;(c) removing heat from said fluid provided at said first temperature by step (b) by condensing at least a portion of said heat transfer fluid to produce at least a portion of said heat transfer fluid in a liquid phase at about said first pressure;(d) reducing the pressure of at least a portion of said liquid heat transfer fluid from step (c) to produce a heat transfer fluid at a second temperature substantially below said first temperature and a second pressure substantially below said first pressure;(e) cooling the body by evaporating at least a portion of said heat transfer fluid produced at said second temperature in step (d); and(f) providing at least a portion of said fluid at said first pressure in said step (a) by compressing said evaporated heat transfer fluid provided in step (e) from about said second pressure to about said first pressure. 13. The method of claim 12 wherein said composition comprises at least about 50% by weight of trans-1,3,3,3-tetrafluoropropene. 14. The method of claim 12 wherein said composition comprises at least about 70% by weight of trans-1,3,3,3-tetrafluoropropene. 15. The method of claim 9 wherein said polyol ester lubricant has a degree of miscibility with said trans-1,3,3,3-tetrafluoropropene so that when up to five weight percent of lubricant is added to said trans-1,3,3,3-tetrafluoropropene the mixture has one liquid phase at least one temperature between −50 and +70° C.