# US 2014/0150443 A1 · Gas Turbine Engine with Integrated Bottoming Cycle System

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- Number: US 2014/0150443 A1
- Document ID: US20140150443A1
- Status: Published application
- Kind: A1
- Application number: 13/693,113
- Filed: 2012-12-04
- Published: 2014-06-05
- Earliest claimed: 2012-12-04
- Assignees: General Electric Company
- Applicants: General Electric Company
- Inventors: Donald Gordon Laing; Charles Michael Booth
- Web page: https://patentgrep.com/patent/US20140150443A1

## CPC

- F01K 23/10: with exhaust fluid of one cycle heating the fluid in another cycle (F01K17/025 takes precedence)
- F01K 23/103: {with afterburner in exhaust boiler}
- 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)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present application provides an integrated bottoming cycle system for use with a gas turbine engine. The integrated bottoming cycle system described herein may include a compressor/pump, a cooling circuit downstream of the compressor/pump, a bottoming cycle heat exchanger, a heating circuit downstream of the bottoming cycle heat exchanger, and a number of turbine components in communication with the cooling circuit and/or the heating circuit to maximize the overall plant efficiency and economics.

## Claims

### Claim 1

An integrated bottoming cycle system for use with a gas turbine engine, comprising:
a compressor/pump;
a cooling circuit downstream of the compressor/pump;
a bottoming cycle heat exchanger;
a heating circuit downstream of the bottoming cycle heat exchanger; and
a plurality of turbine components in communication with the cooling circuit and/or the heating circuit.

### Claim 2 (depends on 1)

The integrated bottoming cycle system of claim 1, wherein the compressor/pump and the bottoming cycle heat exchanger comprise a Rankine cycle system.

### Claim 3 (depends on 1)

The integrated bottoming cycle system of claim 1, further comprising a flow of supercritical carbon dioxide.

### Claim 4 (depends on 1)

The integrated bottoming cycle system of claim 1, further comprising a turbo-expander downstream of the bottoming cycle heat exchanger.

### Claim 5 (depends on 1)

The integrated bottoming cycle system of claim 1, wherein the heating circuit comprises a hot pressurized flow circuit for de-icing, for heating a flow of fuel, and for improved efficiency under part load conditions.

### Claim 6 (depends on 1)

The integrated bottoming cycle system of claim 1, wherein the heating circuit comprises a spent flow circuit.

### Claim 7 (depends on 1)

The integrated bottoming cycle system of claim 1, further comprising a burner upstream of the bottoming cycle heat exchanger for fast start up and increased output.

### Claim 8 (depends on 1)

The integrated bottoming cycle system of claim 1, wherein the plurality of turbine components comprises a fuel heater.

### Claim 9 (depends on 8)

The integrated bottoming cycle system of claim 8, wherein the fuel heater comprises a burner fuel heater.

### Claim 10 (depends on 1)

The integrated bottoming cycle system of claim 1, wherein the cooling circuit comprises one or more expansion or Joule-Thomson valves thereon.

### Claim 11 (depends on 1)

The integrated bottoming cycle system of claim 1, wherein the plurality of turbine components comprises an electrical/electronics heat exchanger.

### Claim 12 (depends on 1)

The integrated bottoming cycle system of claim 1, wherein the plurality of turbine components comprises a condensing heat exchanger.

### Claim 13 (depends on 1)

The integrated bottoming cycle system of claim 1, further comprising a recuperator upstream of the bottoming cycle heat exchanger.

### Claim 14 (depends on 1)

The integrated bottoming cycle system of claim 1, further comprising a rule-based control system.

### Claim 15

A method of operating an integrated bottoming cycle system, comprising:
Compressing/pressurizing a flow of carbon dioxide;
warming the flow of carbon dioxide;
expanding the flow of carbon dioxide;
driving a load by the expanding flow of carbon dioxide; and
diverting a portion of the compressed flow to cool a turbine component; or diverting a portion of the warmed flow to heat a turbine component.

### Claim 16

An integrated bottoming cycle system for use with a gas turbine engine, comprising:
a carbon dioxide compressor/pump for compressing/pumping a flow of supercritical carbon dioxide;
a cooling circuit downstream of the compressor;
a bottoming cycle heat exchanger for exchanging heat with the gas turbine engine;
a heating circuit downstream of the bottoming cycle heat exchanger; and
a plurality of turbine components in communication with the cooling circuit and/or the heating circuit.

### Claim 17 (depends on 16)

The integrated bottoming cycle system of claim 16, further comprising a turbo-expander positioned downstream of the bottoming cycle heat exchanger to drive a load.

### Claim 18 (depends on 16)

The integrated bottoming cycle system of claim 16, wherein the heating circuit comprises a hot pressurized flow circuit and a spent flow circuit.

### Claim 19 (depends on 16)

The integrated bottoming cycle system of claim 16, wherein the cooling circuit comprises one or more expansion or Joule-Thomson valves thereon.

### Claim 20 (depends on 19)

The integrated bottoming cycle system of claim 19, further comprising a rule-based control system.