Power generation system having compressor creating excess gas flow for supplemental gas turbine system

Patent metadata

Field	Value
Publication number	US-2016273402-A1
Application number	US-201514662836-A
Country	US
Kind code	A1
Filing date	Mar 19, 2015
Priority date	Mar 19, 2015
Publication date	Sep 22, 2016
Grant date	—

Abstract

A power generation system may include a generator; a gas turbine system for powering the generator, the gas turbine system including a turbine component, an integral compressor and a combustor to which air from the integral compressor and fuel are supplied, the combustor arranged to supply hot combustion gases to the turbine component, and the integral compressor having a flow capacity greater than an intake capacity of at least one of the combustor and the turbine component, creating an excess air flow. A first control valve system controls flow of the excess air flow along an excess air flow path to a supplemental gas turbine system. The excess air flow may be combusted with a fuel and supplied to the supplemental gas turbine system. An eductor may be positioned in the excess air flow path for using the excess air flow as a motive force to augment the excess air flow with additional gas.

First claim

What is claimed is:

1 . A power generation system, comprising:
a generator; a gas turbine system for powering the generator, the gas turbine system including a turbine component, an integral compressor and a combustor to which air from the integral compressor and fuel are supplied, the combustor arranged to supply hot combustion gases to the turbine component, and the integral compressor having a flow capacity greater than an intake capacity of at least one of the combustor and the turbine component, creating an excess air flow; a supplemental gas turbine system including a supplemental combustor arranged to supply hot combustion gases to a supplemental turbine component thereof, the supplemental turbine component operatively coupled to a supplemental generator; and a first control valve system controlling flow of the excess air flow along an excess air flow path, wherein the excess air flow path feeds the excess air flow to an intake of the supplemental combustor, and the supplemental combustor combusts the excess air flow with a fuel to create the hot combustion gases for the supplemental turbine component.

2 . The power generation system of claim 1 , wherein an exhaust of the turbine component feeds a heat recovery steam generator (HRSG) for creating steam for a steam turbine system.

3 . The power generation system of claim 2 , wherein the HRSG also feeds steam to a co-generation steam load.

4 . The power generation system of claim 1 , wherein the first control valve system includes a compressor discharge control valve controlling a first portion of the excess air flow taken from a discharge of the integral compressor, and an upstream control valve controlling a second portion of the excess air flow taken from a stage of the integral compressor upstream from the discharge.

5 . The power generation system of claim 4 , further comprising at least one sensor for measuring a flow rate of each portion of the excess air flow, each sensor operably coupled to a respective control valve.

6 . The power generation system of claim 4 , further comprising an eductor positioned in the excess air flow path for using the excess air flow as a motive force to augment the excess air flow with additional gas, the educator creating an augmented excess gas flow,
wherein the excess air flow path feeds the augmented excess gas flow to the intake of the supplemental combustor, and the supplemental combustor combusts the augmented excess gas flow with the fuel to create the hot combustion gases for the supplemental turbine component.

7 . The power generation system of claim 6 , wherein the eductor includes a suction side flow path, and further comprising a second control valve system in the suction side flow path controlling a flow of the additional gas into the eductor.

8 . The power generation system of claim 6 , further comprising a sensor for measuring a flow rate of the additional gas in the suction side flow path, the sensor operably coupled to the second control valve system.

9 . The power generation system of claim 6 , wherein the suction side flow path is fluidly coupled to an inlet filter of the integral compressor.

10 . The power generation system of claim 1 , wherein the generator that is different than the supplement generator.

11 . The power generation system of claim 1 , wherein the suction side flow path is fluidly coupled to an inlet filter of the integral compressor.

12 . The power generation system of claim 1 , wherein the additional gas includes ambient air.

13 . The power generation system of claim 1 , wherein the additional gas includes a process gas.

14 . The power generation system of claim 1 , wherein the additional gas includes a synthesis gas.

15 . The power generation system of claim 1 , wherein the additional gas includes exhaust from an engine.

16 . The power generation system of claim 1 , further comprising an eductor positioned in the excess air flow path for using the excess air flow as a motive force to augment the excess air flow with additional gas, the educator creating an augmented excess gas flow,
wherein the excess air flow path feeds the augmented excess gas flow to the intake of the supplemental combustor, and the supplemental combustor combusts the augmented excess gas flow with the fuel to create the hot combustion gases for the supplemental turbine component.

17 . A method, comprising:
powering a generator using a gas turbine system including a turbine component, an integral compressor and a combustor to which air from the integral compressor and fuel are supplied, the combustor arranged to supply hot combustion gases to the turbine component, and the integral compressor having a flow capacity greater than an intake capacity of at least one of the combustor and the turbine component, creating an excess air flow; powering a supplemental generator using a supplemental gas turbine system including a supplemental combustor arranged to supply hot combustion gases to a supplemental turbine component thereof, the supplemental turbine component operatively coupled to the supplemental generator; and extracting the excess air flow from the gas turbine system and directing the excess air flow to an intake of the supplemental combustor, the supplemental combustor combusting the excess air flow with a fuel to create the hot combustion gases for the supplemental turbine component.

18 . The method of claim 17 , further comprising:
augmenting the excess air flow with additional gas using an eductor positioned in the excess air flow path, the eductor using the excess air flow as a motive force to create an augmented excess gas flow; and directing the augmented excess gas flow in the excess air flow path to the intake of the supplemental combustor, the supplemental combustor combusting the augmented excess gas flow with the fuel to create the hot combustion gases for the supplemental turbine component.

19 . The method of claim 17 , further comprising directing an exhaust of the supplemental gas turbine component and an exhaust of the turbine component to a heat recovery steam generator (HRSG) for creating steam for a steam turbine system.

20 . The method of claim 17 , wherein the additional gas includes ambient air.

Assignees

• Gen Electric

Inventors

• Ekanayake Sanji
• Freeman Thomas John
• Memmer John David
• Rehg Timothy Joseph
• Scipio Alston Ilford

Classifications

• F02C3/04

  having a turbine driving a compressor (power transmission arrangements F02C7/36; control of working fluid flow F02C9/16) · CPC title

• F01K23/10 Primary

  with exhaust fluid of one cycle heating the fluid in another cycle (F01K17/025 takes precedence) · CPC title

• F02C6/00

  Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use · CPC title

• F02C3/32

  Inducing air flow by fluid jet, e.g. ejector action · CPC title

• Y02E20/16

  Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT] · CPC title