Steam turbine preheating system with a steam generator
The present application provides a power generation system. The power generation system may include a gas turbine engine, a steam turbine, and a steam turbine preheating system. The steam turbine preheating system may include a steam generator that creates a flow of steam to preheat the steam turbine from an extraction of the gas turbine engine.
1. A power generation system, comprising:
a gas turbine engine;
a steam turbine; and
a steam turbine preheating system;
wherein the steam turbine preheating system comprises a steam generator that creates a flow of steam to preheat the steam turbine from an extraction of the gas turbine engine.
2. The power generation system of claim 1 , wherein the gas turbine engine comprises a turbine casing and wherein the extraction extends from the turbine casing to the steam generator.
3. The power generation system of claim 1 , wherein the extraction comprises an extraction of hot combustion gases.
4. The power generation system of claim 1 , wherein the steam generator comprises a source of feedwater in communication therewith.
5. The power generation system of claim 1 , wherein the steam turbine comprises a steam turbine shell and wherein the flow of steam extends from the steam generator to the steam turbine shell.
6. The power generation system of claim 1 , further comprising a controller in communication with a plurality of sensors.
7. The power generation system of claim 1 , further comprising a heat recovery steam generator.
8. The power generation system of claim 1 , wherein the steam turbine preheating system comprises an attemperation system.
9. The power generation system of claim 8 , wherein the attemperation system comprises a spray system for at least one of a water injection and a steam injection.
10. The power generation system of claim 1 , wherein the steam turbine preheating system comprises an ejector in communication with the steam generator.
11. The power generation system of claim 10 , wherein the ejector is in communication with at least one of an ambient air flow, a filtered air flow, and a compressor air extraction.
12. The power generation system of claim 1 , wherein the steam turbine preheating system comprises a cascading ejector system in communication with the steam generator.
13. The power generation system of claim 12 , wherein the cascading ejector system comprises a first ejector in communication with a compressor of the gas turbine engine and a second ejector in communication with a turbine of the gas turbine engine.
14. The power generation system of claim 1 , wherein the steam turbine preheating system comprises a further extraction from downstream of the gas turbine engine to the steam generator.
15. A method of preheating a steam turbine in a power generation system, comprising:
extracting hot combustion gases from a gas turbine to a steam generator;
flowing feedwater to the steam generator;
exchanging heat between the hot combustion gases and the flow of feedwater to create a flow of steam in the steam generator; and
flowing the steam to the steam turbine to warm a shell of the steam turbine.
16. A combined cycle power generation system, comprising:
a gas turbine engine;
a steam turbine;
a heat recovery steam generator; and
a steam turbine preheating system;
wherein the steam turbine preheating system comprises a steam generator that creates a flow of steam to preheat the steam turbine from an extraction of the gas turbine engine and a flow of feedwater.
17. The combined cycle power generation system of claim 16 , wherein the gas turbine engine comprises a turbine casing and wherein the extraction extends from the turbine casing to the steam generator.
18. The combined cycle power generation system of claim 16 , wherein the extraction comprises an extraction of hot combustion gases.
19. The combined cycle power generation system of claim 16 , wherein the steam turbine comprises a steam turbine shell and wherein the flow of steam extends from the steam generator to the steam turbine shell.
20. The combined cycle power generation system of claim 16 , wherein the steam turbine preheating system comprises a spray system for at least one of a water injection and a steam injection.