SYSTEM FOR VENTILATING A GAS TURBINE ENCLOSURE

• US 20130005237A1
• Filed: 06/28/2011
• Published: 01/03/2013
• Est. Priority Date: 06/28/2011
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Baten, Robert Allen, Drobniak, David Joseph, Ross, Harley Matthew
• Granted Patent: US 9,091,215 B2
• Time in Patent Office: Days
• US Class Current: 454/252
• CPC Class Codes: F01D 25/12 Cooling
• CPC Class Codes: F02C 3/32 Inducing air flow by fluid jet, e.g. ejector action
• 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: F05D 2260/601 using an ejector or a jet pump
• CPC Class Codes: F24F 7/08 with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
• CPC Class Codes: Y02E 20/16 Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

Abstract

A turbine ventilation system includes at least one fan configured to provide a first air flow into a gas turbine enclosure, a fan bypass configured to circumvent the at least one fan to provide a second air flow into the gas turbine enclosure, and an eductor configured to draw the first or second air flows through and out of the gas turbine enclosure.

Claims

1. A system, comprising:

a gas turbine enclosure;

a gas turbine engine disposed in the gas turbine enclosure, wherein the gas turbine engine is configured to output an exhaust flow; and

a ventilation system coupled to the gas turbine enclosure, wherein the ventilation system comprises;

at least one fan configured to provide a first air flow into the gas turbine enclosure;

a fan bypass configured to circumvent the at least one fan to provide a second air flow into the gas turbine enclosure; and

an exhaust driven eductor configured to draw the first or second air flows through and out of the gas turbine enclosure using the exhaust flow.

2. The system of claim 1, wherein the fan bypass comprises an actuator coupled to a valve.

3. The system of claim 2, wherein the actuator comprises an electric drive.

4. The system of claim 2, wherein the actuator comprises a fluid drive.

5. The system of claim 2, wherein the actuator comprises a biasing element configured to bias the valve toward an open position or a closed position.

6. The system of claim 2, wherein the valve comprises one or more doors.

7. The system of claim 2, wherein the valve comprises a louver assembly comprising a plurality of rotatable slats.

8. The system of claim 1, wherein the fan bypass comprises a check valve configured to open automatically in response to an air flow pressure above a threshold.

9. The system of claim 1, wherein the at least one fan is configured to provide the first air flow into the gas turbine enclosure to purge the gas turbine enclosure at least prior to a startup procedure of the gas turbine engine.

10. The system of claim 1, wherein the exhaust driven eductor is configured to draw the second air flow from the fan bypass through and out of the gas turbine enclosure while the at least one fan is deactivated during operation of the gas turbine engine.

11. The system of claim 1, wherein the system comprises a mobile unit having the gas turbine enclosure, the gas turbine engine, and the ventilation system.

12. A system, comprising:

a turbine ventilation system, comprising;

at least one fan configured to provide a first air flow into a gas turbine enclosure;

a fan bypass configured to circumvent the at least one fan to provide a second air flow into the gas turbine enclosure; and

an eductor configured to draw the first or second air flows through and out of the gas turbine enclosure.

13. The system of claim 12, wherein the eductor comprises an exhaust driven eductor configured to draw the first or second air flows through and out of the gas turbine enclosure into a turbine exhaust flow.

14. The system of claim 12, wherein the fan bypass comprises an actuator coupled to a valve.

15. The system of claim 12, wherein the at least one fan is configured to provide the first air flow into the gas turbine enclosure to purge the gas turbine enclosure at least prior to a startup procedure of a gas turbine engine, and the eductor is configured to draw the second air flow from the fan bypass through and out of the gas turbine enclosure while the at least one fan is deactivated during operation of the gas turbine engine.

16. The system of claim 12, comprising a turbine system coupled to the turbine ventilation system, wherein the turbine system includes a gas turbine engine disposed in the gas turbine enclosure.

17. A system, comprising:

a gas turbine controller, comprising;

a turbine purge logic configured to activate at least one fan to purge a gas turbine enclosure disposed about a gas turbine engine; and

a turbine ventilation logic configured to activate a fan bypass to circumvent the at least one fan to ventilate the gas turbine enclosure using an exhaust driven eductor.

18. The system of claim 17, wherein the turbine purge logic is configured to activate the at least one fan to purge the gas turbine enclosure upon activation of a startup sequence and prior to ignition of the gas turbine engine.

19. The system of claim 17, wherein the turbine ventilation logic is configured to deactivate the at least one fan and open the fan bypass after the purge of the gas turbine enclosure.

20. The system of claim 17, comprising the fan bypass coupled to the gas turbine controller, wherein the fan bypass comprises at least one door or louver