Turbine power generator including supplemental parallel cooling and related methods

• US 20040007878A1
• Filed: 07/11/2002
• Published: 01/15/2004
• Est. Priority Date: 07/11/2002
• Status: Active Grant

• Current Assignee: Siemens Energy Incorporated (Siemens AG)
• Original Assignee: Siemens Westinghouse Power Corporation
• Inventors: McCreight, Kim M., Warren, Bobby A., Nelson, Robert J., Lau, James F.
• Granted Patent: US 6,798,079 B2
• Time in Patent Office: Days
• US Class Current: 290/2
• CPC Class Codes: F01D 25/12 Cooling
• CPC Class Codes: F02C 7/12 Cooling of plants of component parts, see the relevant subclasses, e.g. F01D; cooling of engines in general F01P
• CPC Class Codes: H02K 9/04 having means for generating a flow of cooling medium
• CPC Class Codes: H02K 9/06 with fans or impellers driven by the machine shaft
• CPC Class Codes: H02K 9/10 by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing

Abstract

A turbine power generator 20 includes a housing 22, a shaft 24, a turbine 26 to drive the shaft, a shaft-driven generator rotor 28, and generator stator 30 within the housing and surrounding the rotor. A main cooling gas blower 32 includes at least one blade 34 driven by the shaft 24 for causing a main flow of cooling gas to cool the rotor 28 and/or stator 30. A supplemental cooling gas blower 36 is connected in parallel with the main cooling gas blower 32 for causing a supplemental flow of cooling gas through the housing 22 in addition to the main flow of cooling gas to cool the rotor 28 and/or stator 30. The supplemental cooling gas blower may include an electric motor 38 and at least one blade 40 driven thereby. A controller 39 may be connected to the electric motor 38 to permit selective operation of the supplemental cooling gas blower 36.

Claims

1. A turbine power generator comprising:

a housing;

a shaft;

a turbine driving said shaft;

a generator rotor driven by said shaft;

a generator stator within said housing and surrounding said generator rotor;

a main cooling gas blower comprising at least one blade driven by said shaft for causing a main flow of cooling gas through said housing to cool at least one of said generator rotor and generator stator; and

a supplemental cooling gas blower comprising an electric motor and at least one blade driven thereby, said supplemental cooling gas blower connected in parallel with said main cooling gas blower for causing a supplemental flow of cooling gas through said housing in addition to the main flow of cooling gas to cool at least one of said generator rotor and generator stator.

2. A turbine power generator according to claim 1 wherein said main cooling gas blower has an inlet;

and wherein said supplemental cooling gas blower also has an inlet connected in parallel with the inlet of said main cooling gas blower.

3. A turbine power generator according to claim 1 wherein said main cooling gas blower has an outlet;

and wherein said supplemental cooling gas blower also has an outlet connected in parallel with the outlet of said main cooling gas blower.

4. A turbine power generator according to claim 1 wherein said main and supplemental cooling gas blowers are arranged relative to at least one of said generator rotor and generator stator to draw cooling gas thereover.

5. A turbine power generator according to claim 4 wherein said housing has at least one outlet;

and wherein said main and supplemental cooling gas blowers have respective inlets in fluid communication with the at least one outlet of said housing.

6. A turbine power generator according to claim 1 wherein said main and supplemental cooling gas blowers are arranged relative to at least one of said generator rotor and generator stator to force cooling gas thereover.

7. A turbine power generator according to claim 6 wherein said housing has at least one inlet;

and wherein said main and supplemental cooling gas blowers have respective outlets in fluid communication with the at least one inlet of said housing.

8. A turbine power generator according to claim 1 wherein said main and supplemental cooling gas blowers are arranged to cool both said generator rotor and said generator stator.

9. A turbine power generator according to claim 1 wherein said supplemental cooling gas blower is positioned external to said housing.

10. A turbine power generator according to claim 1 wherein said supplemental cooling gas blower further comprises a controller connected to said electric motor to permit selective operation of said supplemental cooling gas blower.

11. A turbine power generator according to claim 1 wherein the main and supplemental cooling gas flows are exhausted into the atmosphere to define an open air cooled (OAC) system.

12. A turbine power generator according to claim 1 wherein the main and supplemental cooling gas flows are water cooled and recycled to define a totally enclosed water-to-air cooled (TEWAC) system.

13. A turbine power generator according to claim 1 wherein the main and supplemental cooling gas flows are cooled and recycled to define a hydrogen-cooled system.

14. A turbine power generator comprising:

a housing;

a shaft;

a turbine driving said shaft;

a generator rotor driven by said shaft;

a generator stator within said housing and surrounding said generator rotor;

a main cooling gas blower comprising at least one blade driven by said shaft for causing a main flow of cooling gas through said housing to cool said generator rotor and generator stator; and

a supplemental cooling gas blower positioned external from said housing and comprising an electric motor and at least one blade driven thereby, said supplemental cooling gas blower connected in parallel with said main cooling gas blower for causing a supplemental flow of cooling gas through said housing in addition to the main flow of cooling gas to cool said generator rotor and generator stator.

15. A turbine power generator according to claim 14 wherein said supplemental cooling gas blower further comprises a controller connected to said electric motor to permit selective and variable output ventilation operation of said supplemental cooling gas blower.

16. A turbine power generator according to claim 14 wherein the main and supplemental cooling gas flows are exhausted into the atmosphere to define an open air cooled (OAC) system.

17. A turbine power generator according to claim 14 wherein the main and supplemental cooling gas flows are water cooled and recycled to define a totally enclosed water-to-air cooled (TEWAC) system.

18. A turbine power generator according to claim 14 wherein the main and supplemental cooling gas flows are cooled and recycled to define a hydrogen-cooled system.

19. A method of cooling a turbine power generator comprising a housing, a shaft, a turbine driving the shaft, a generator rotor driven by the shaft, a generator stator within the housing and surrounding the generator rotor, and a main cooling gas blower driven by the shaft, the method comprising:

operating the turbine power generator so that the main cooling gas blower causes a main flow of cooling gas through the housing to cool at least one of the generator rotor and generator stator; and

operating an electric motor of a supplemental cooling gas blower connected in parallel with the main cooling gas blower for causing a supplemental flow of cooling gas through the housing in addition to the main flow of cooling gas to cool at least one of the generator rotor and generator stator.

20. A method according to claim 19 wherein the main and supplemental cooling gas flows cool both the generator rotor and generator stator.

21. A method according to claim 19 further comprising positioning the supplemental cooling gas blower external to the housing.

22. A method according to claim 19 further comprising connecting a controller to the electric motor to permit selective operation of the supplemental cooling gas blower.

23. A method according to claim 19 further comprising exhausting the main and supplemental cooling gas flows into the atmosphere to define an open air cooled (OAC) system.