# US 2013/0152587 A1 · System and method for warming up a steam turbine

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- Number: US 2013/0152587 A1
- Document ID: US20130152587A1
- Status: Published application
- Kind: A1
- Application number: 13/688,467
- Filed: 2012-11-29
- Published: 2013-06-20
- Earliest claimed: 2011-12-14
- Assignees: General Electric Company
- Inventors: Harold Lamar Jordan, JR.; TsungPo Lin; John Edward Sholes, JR.
- Web page: https://patentgrep.com/patent/US20130152587A1

## CPC

- F01K 13/00: General layout or general methods of operation of complete plants
- F01D 19/00: Starting of machines or engines; Regulating, controlling, or safety means in connection therewith (warming-up before starting F01D25/10; turning or inching gear F01D25/34)
- F01D 19/02: dependent on temperature of component parts, e.g. of turbine-casing
- F01D 25/10: Heating, e.g. warming-up before starting
- F01K 13/02: Controlling, e.g. stopping or starting
- F01K 23/101: {Regulating means specially adapted therefor (F01K23/105, F01K23/108 take precedence)}
- F02C 6/18: using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants (using waste heat as source of energy for refrigeration plants F25B27/02; using the waste heat of a gasturbine for steam generation or in a steam cycle see F01K23/10)
- F02C 9/00: Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants (controlling air intakes F02C7/057; controlling turbines F01D; controlling compressors F04D27/00; controlling in general G05)
- F02C 9/28: Regulating systems responsive to plant or ambient parameters, e.g. temperature, pressure, rotor speed (F02C9/30 - F02C9/38, F02C9/44 take precedence)
- F05D 2220/72: a steam turbine
- F05D 2260/20: Heat transfer, e.g. cooling
- F05D 2270/301: Pressure
- F05D 2270/303: Temperature
- F05D 2270/3061: of the working fluid
- F05D 2270/311: Air humidity
- F05D 2270/313: Air temperature
- F05D 2270/332: Maximum loads or fatigue criteria
- F05D 2270/335: Output power or torque
- Y02E 20/16: Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- F01K: STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES (gas-turbine or jet-propulsion plants F02; nuclear power plants, engine arrangements therein G21D)
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A system for warming up a steam turbine includes a gas turbine and a controller operably connected to the gas turbine. The controller is programmed to receive a plurality of measured input signals and control the gas turbine to produce an exhaust having a desired energy. A first measured input signal is reflective of a measured operating parameter of the gas turbine and a second measured input signal is reflective of an operating parameter of the steam turbine. A method for warming up a steam turbine includes sending a plurality of measured input signals to a controller, wherein a first measured input signal reflects a measured operating parameter of a gas turbine and a second measured input signal reflects an operating parameter of the steam turbine. The method further includes controlling the gas turbine based on the plurality of measured input signals and producing an exhaust from the gas turbine, wherein the exhaust has a desired energy.

## Claims

### Claim 1

A system for warming up a steam turbine, comprising:
a. a gas turbine;
b. a controller operably connected to the gas turbine, wherein the controller is programmed to receive a plurality of measured input signals and control the gas turbine to produce an exhaust having a desired energy; and
c. wherein a first measured input signal is reflective of a measured operating parameter of the gas turbine and a second measured input signal is reflective of an operating parameter of the steam turbine.

### Claim 2 (depends on 1)

The system as in claim 1, wherein the measured operating parameter of the gas turbine comprises at least one of a compressor inlet pressure, a compressor inlet flow, a compressor discharge pressure, a compressor discharge temperature, a compressor extraction flow, a power output of a generator, a power loss from a generator, a fuel flow rate, or a fuel composition.

### Claim 3 (depends on 1)

The system as in claim 1, wherein at least one of the measured input signals is reflective of a measured ambient temperature or a measured ambient humidity.

### Claim 4 (depends on 1)

The system as in claim 1, wherein at least one of the measured input signals is reflective of a measured temperature of the steam turbine.

### Claim 5

The system as in claim I, wherein the controller is programmed to control the gas turbine to produce the exhaust having at least one of a desired temperature or a desired flow rate.

### Claim 6 (depends on 1)

The system as in claim 1, wherein the controller is programmed to control at least one of a position of an inlet guide vane in the gas turbine, a fuel flow rate to the gas turbine, a flow rate through a compressor, or a compressor discharge pressure.

### Claim 7

A method for warming up a steam turbine, comprising:
a. sending one or more measured input signals to a controller, wherein a first measured input signal reflects a measured operating parameter of a gas turbine and a second measured input signal reflects an operating parameter of the steam turbine;
b. controlling the gas turbine based on the plurality of measured input signals; and
c. producing an exhaust from the gas turbine, wherein the exhaust has a desired energy.

### Claim 8 (depends on 7)

The method as in claim 7, wherein the sending at least one or more measured input signals to the controller includes sending at least one of a measured ambient temperature signal or a measured ambient humidity signal to the gas turbine.

### Claim 9 (depends on 7)

The method as in claim 7, wherein the sending at least one or more measured input signals to the controller includes sending at least one of a measured steam turbine temperature signal.

### Claim 10 (depends on 7)

The method as in claim 7, further comprising controlling the gas turbine to produce the exhaust having at least one of a desired temperature or a desired flow rate.

### Claim 11 (depends on 7)

The method as in claim 7, further comprising controlling at least one of a position of an inlet guide vane in the gas turbine, a fuel flow rate to the gas turbine, a flow rate through a compressor, or a compressor discharge pressure.