Combinations of E-1,3,3,3-tetrafluoropropene and at least one tetrafluoroethane and their use for heating

Patent metadata

Field	Value
Publication number	US-9828536-B2
Application number	US-201113988028-A
Country	US
Kind code	B2
Filing date	Dec 14, 2011
Priority date	Dec 14, 2010
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

Disclosed herein is a method for producing heating comprising condensing a vapor working fluid comprising (a) E-CF3CH═CHF and (b) at least one tetrafluoroethane of the formula C2H2F4. Also disclosed herein is a heat pump apparatus containing a working fluid comprising (a) E-CF3CH═CHF and (b) at least one tetrafluoroethane of the formula C2H2F4. Also disclosed herein is a method for raising the maximum feasible condenser operating temperature in a heat pump apparatus suitable for use with HFC-134a, comprising charging the heat pump with a working fluid comprising (a) E-CF3CH═CHF and (b) at least one tetrafluoroethane of the formula C2H2F4. Also disclosed herein is a method for replacing HFC-134a refrigerant in a heat pump designed for HFC-134a comprising providing a replacement working fluid comprising (a) E-CF3CH═CHF and (b) at least one tetrafluoroethane of the formula C2H2F4.

First claim

What is cliamed is:

1. A method for producing heating comprising condensing a vapor working fluid comprising (a) from about 60 to 70 weight percent E -CF 3 CH═CHF and (b) from about 40 to 30 weight percent CHF 2 CHF 2 , in a condenser, thereby producing a liquid working fluid; wherein the heating is produced in a high temperature heat pump with said condenser operating at temperatures greater than about 55° C.

2. The method of claim 1 , further comprising passing a heat transfer medium through the condenser, whereby said condensation of working fluid heats the heat transfer medium, and passing the heated heat transfer medium from the condenser to a body to be heated.

3. The method of claim 2 , comprising passing a heat transfer medium through the condenser, and passing the heated heat transfer medium from the condenser to a body to be heated; wherein the heat transfer medium is water and the body to be heated is water or air for space heating.

4. The method of claim 2 , comprising passing a heat transfer medium through the condenser, and passing the heated heat transfer medium from the condenser to a body to be heated; wherein the heat transfer medium is an industrial heat transfer liquid and the body to be heated is a chemical process stream.

5. The method of claim 2 , further comprising compressing the working fluid vapor in a centrifugal compressor.

6. The method of claim 1 , further comprising passing a fluid to be heated through said condenser, thus heating the fluid.

7. The method of claim 6 , wherein the fluid is air and the heated air from the condenser is passed to a space to be heated.

8. The method of claim 6 wherein the fluid to be heated is a portion of a process stream and the heated portion is returned to a process.

9. The method of claim 1 comprising condensing the working fluid in the condenser of the high temperature heat pump, wherein the high temperature heat pump further comprises a centrifugal compressor.

10. The method of claim 1 comprising condensing the vapor working fluid in the condenser, wherein said working fluid comprises (a) from about 60 to 65 weight percent E-CF 3 CH═CHF and (b) from about 40 to 35weight percent CHF 2 CHF 2 .

11. The method of claim 1 wherein the heating is produced in a high temperature heat pump with said condenser operating at temperatures greater than about 71° C.

12. A heat pump apparatus containing a working fluid comprising (a) from about 60 to 70 weight percent E-CF 3 CH═CHF and (b) from about 40 to 30 weight percent CHF 2 CHF 2 ; wherein the heat pump is a high temperature heat pump comprising a condenser, wherein said condenser operates at temperatures greater than about 55° C.

13. The heat pump apparatus of claim 12 comprising a centrifugal compressor.

14. The heat pump apparatus of claim 12 , wherein the high temperature heat pump comprises a centrifugal compressor.

15. The heat pump apparatus of claim 12 containing a working fluid comprising (a) from about 60 to 65 weight percent E-CF 3 CH═CHF and (b) from about 40 to 35 weight percent CHF 2 CHF 2 .

16. The heat pump apparatus of claim 12 wherein said condenser operates at temperatures greater than about 71° C.

17. A method of raising a maximum feasible condenser operating temperature in a heat pump apparatus suitable for use with HFC-134a working fluid relative to the maximum feasible condenser operating temperature when HFC-134a is used as a heat pump working fluid, comprising charging the heat pump with a working fluid comprising (a) from about 60 to 70 weight percent E-CF 3 CH═CHF and (b) from about 40 to 30 weight percent CHF 2 CHF 2 ; wherein the heat pump is a high temperature heat pump; and wherein said condenser operates at temperature greater than about 71° C.

18. A method for replacing HFC-134a refrigerant in a heat pump designed for HFC-134a comprising providing a replacement working fluid comprising (a) from about 60 to 70 weight percent E-CF 3 CH═CHF and (b) from about 40 to 30 weight percent CHF 2 CHF 2 ; wherein the heat pump is a high temperature heat pump with maximum condenser operating temperatures greater than about 55° C.

Assignees

• Kontomaris Konstantinos
• Chemours Co Fc Llc

Inventors

• Kontomaris Konstantinos

Classifications

• F24H4/00

  Fluid heaters characterised by the use of heat pumps · CPC title

• C09K5/045 Primary

  containing only fluorine as halogen · CPC title

• C09K2205/22

  All components of a mixture being fluoro compounds · CPC title

• F25B45/00

  Arrangements for charging or discharging refrigerant · CPC title

• C09K2205/126

  Unsaturated fluorinated hydrocarbons · CPC title