Hybrid power system for continuous reliable power at remote locations

• US 20030218385A1
• Filed: 05/22/2002
• Published: 11/27/2003
• Est. Priority Date: 05/22/2002
• Status: Active Grant

• Current Assignee: Ormat Technologies Incorporated (Ormat Industries Limited)
• Original Assignee: Ormat Technologies Incorporated (Ormat Industries Limited)
• Inventors: Bronicki, Lucien Y.
• Granted Patent: US 6,883,328 B2
• Time in Patent Office: Days
• US Class Current: 307/43
• CPC Class Codes: F01K 13/00 General layout or general methods of operation of complete plants
• CPC Class Codes: F01K 13/02 Controlling, e.g. stopping or starting
• CPC Class Codes: F01K 23/065 the combustion taking place in an internal combustion piston engine, e.g. a diesel engine
• CPC Class Codes: F01K 23/101 Regulating means specially adapted therefor F01K23/105, F01K23/108 take precedence
• CPC Class Codes: H01M 2250/407 Combination of fuel cells with mechanical energy generators
• CPC Class Codes: H02J 9/00 Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
• CPC Class Codes: Y02E 20/16 Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
• CPC Class Codes: Y02E 60/50 Fuel cells

Abstract

The present inventive subject matter is thus drawn to a hybrid ultra reliable power generating system for supplying continuous reliable power at remote locations comprising: a primary power unit producing electric power that is supplied to a load. And a secondary power unit in the form of a closed cycle vapor turbine (CCVT) system that is capable of producing 100% of the electric power that is produced by the primary power unit and which is heated in hot standby by rejected heat of the primary poweer unit, wherein the vaporizer of the CCVT is maintained during hot standby at a temperature above its nominal operating temperature and the vapor turbine of the CCVT is preferable maintained at idle during hot standby at a rotating speed.

Preferably, the CCVT includes a burner that combusts the same fuel as the primary power unit and supplies sufficient heat so that the CCVT produces 100% of power produced by the primary unit to the load once the primary power units stops operation.

Claims

1. A hybrid ultra reliable power generating system comprising:

a) a primary power unit producing electric power that is supplied to a load; and

b) a secondary power unit in the form of a closed cycle vapor turbine (CCVT) system that is capable of producing 100% of the electric power that is produced by the primary power unit and which is heated in hot standby by rejected heat of the primary power unit, wherein the vaporizer of the CCVT is maintained during hot standby at a temperature above its nominal operating temperature and the vapor turbine of the CCVT is maintained at idle hot standby at a rotating speed above its nominal rotating speed.

2. A hybrid power generating systems according to claim 1 wherein during hot standby said CCVT does not supply any power to said load.

3. A hybrid power generating system according to claim 1 wherein said CCVT includes a burner that combusts the same fuel as supplied to the primary power unit and supplies sufficient heat so that the CCVT produces electric power that is supplied to the load at a 100% level of power produced by said primary power unit once the primary power unit stops operation.

4. A hybrid power generating system according to claim 1 wherein said primary power unit is a high temperature fuel cell.

5. A hybrid power generating system according to claim 1 wherein said primary power unit is a solid oxide fuel cell.

6. A hybrid power generating system according to claim 1 wherein said primary power unit is a molten carbonate fuel cell.

7. A hybrid power generating system according to claim 1 wherein said primary power unit is a diesel generator.

8. A hybrid power generating system according to claim 1 wherein said primary power unit is a engine generator.

9. A hybrid power generating system according to claim 1 wherein said primary power unit is a gas turbine generator.

10. A hybrid power generating system according to claim 1 wherein said primary power unit is a stirling engine generator.

11. A hybrid power generating system according to claim 1 wherein said CCVT is a closed vapor turbine operating according to an organic Rankine cycle.

12. A hybrid power generating system according to claim 1 wherein said CCVT is a closed vapor turbine operating according to a steam Rankine cycle.

13. A hybrid power generating system according to claim 4 wherein said high temperature fuel cell comprises a replaceable fuel cell cartridge.

14. A hybrid power generating system according to claim 1 wherein said secondary CCVT system produces electric power that is supplied to the load when said said primary power unit is operating, wherein the level of electric power of said secondary CCVT is up to 33% of the electric power level produced by said primary unit.

15. A method of generating continuous power using a hybrid ultra reliable power generating system comprising:

a) providing a primary power unit producing electric power that is supplied to a load; and

b) providing a secondary power unit in the form of a closed cycle vapor turbine (CCVT) systems that is capable of producing 100% of the electric power that is produced by the primary power unit and which is heated in hot standby rejected heat of the primary power unit, wherein the vaporizer of the CCVT is maintained during hot standby at a temperature above nominal operating temperature and the vapor turbine of the CCVT is maintained at idle during hot standby at a rotating speed above its nominal rotating speed.

16. A method according to claim 15 wherein the step of providing a secondary power unit in the form of a closed cycle vapor turbine (CCVT) system that is capable of producing 100% of the electric power that is produced by the primary power unit and which is heated in hot standby by rejected heat of t he primary power unit is carried out such that said secondary CCVT does not supply electric power to the load during hot standby.

17. A method according to claim 15 including the step of providing a burner that combusts the same fuel as supplied to said primary power unit and that supplies sufficient heat so that the CCVT produces electric power that is supplied to the load at a 100% level of power produced by said primary unit once the primary power unit stops operation.

18. A method according to claim 15 including the step os providing a high temperature fuel as the primary power unit.

19. A method according to claim 15 including the step of providing a diesel generator as the primary unit

20. A method according to claim 15 including the step of providing a closed cycle vapor turbine operating according to an organic Rankine cycle as the secondary CCVT.