# US 2013/0152598 A1 · System and method for thermal control in a gas turbine engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0152598 A1 - Document ID: US20130152598A1 - Status: Published application - Kind: A1 - Application number: 13/329,203 - Filed: 2011-12-16 - Published: 2013-06-20 - Earliest claimed: 2011-12-16 - Assignees: General Electric Company - Inventors: Pradeep Stanley Thacker; Aaron John Avagliano - Web page: https://patentgrep.com/patent/US20130152598A1 ## CPC - F02C 1/06: using reheated exhaust gas (F02C1/08 takes precedence) - F02C 1/007: {combination of cycles} - F02C 6/00: Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use - F02C 6/003: {Gas-turbine plants with heaters between turbine stages} - F02C 6/04: Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output (F02C6/18 takes precedence {; for a fluidised-bed combustor F02C3/205}) - Y02E 20/14: Combined heat and power generation [CHP] - Y02E 20/16: Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT] - 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) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A system includes a gas turbine engine that includes a compressor section configured to generate compressed air and a combustor coupled to the compressor section. The combustor is configured to combust a first mixture comprising the compressed air and a first fuel to generate a first combustion gas. The gas turbine engine also includes a turbine section coupled to the combustor. The turbine section is configured to expand the first combustion gas to generate an exhaust gas. The gas turbine engine also includes a boiler coupled to the turbine section. The boiler is configured to combust a second mixture comprising a portion of the first combustion gas and a second fuel to generate a second combustion gas that is routed to the turbine section. In addition, the boiler generates a first steam from heat exchange with the second combustion gas. ## Claims ### Claim 1 A system, comprising: a gas turbine engine, comprising: a compressor section configured to generate compressed air; a combustor coupled to the compressor section, wherein the combustor is configured to combust a first mixture comprising the compressed air and a first fuel to generate a first combustion gas; a turbine section coupled to the combustor, wherein the turbine section is configured to expand the first combustion gas to generate an exhaust gas; and a boiler coupled to the turbine section, wherein the boiler is configured to combust a second mixture comprising a portion of the first combustion gas and a second fuel to generate a second combustion gas that is routed to the turbine section, and wherein the boiler generates a first steam from heat exchange with the second combustion gas. ### Claim 2 (depends on 1) The system of claim 1, wherein a temperature of the exhaust gas is greater than approximately 575 degrees Celsius. ### Claim 3 (depends on 1) The system of claim 1, comprising a steam power plant coupled to the turbine section. ### Claim 4 (depends on 1) The system of claim 1, wherein the steam power plant comprises: a heat recovery steam generator (HRSG) coupled to the turbine section, wherein the HRSG is configured to generate a second steam from heat exchange with the exhaust gas; and a steam turbine coupled to the HRSG, wherein the steam turbine is configured to drive a load using at least the first steam, or the second steam, or a combination thereof. ### Claim 5 (depends on 4) The system of claim 4, wherein the HRSG is configured to receive the first steam. ### Claim 6 (depends on 1) The system of claim 1, wherein the compressor section comprises a plurality of compressor stages and the turbine section comprises a plurality of turbine stages. ### Claim 7 (depends on 6) The system of claim 6, wherein the boiler is coupled to a first turbine stage of the plurality of turbine stages, or a second turbine stage of the plurality of turbine stages, or both the first and second turbine stages of the plurality of turbine stages. ### Claim 8 (depends on 6) The system of claim 6, comprising an intercooler coupled to a first compressor stage and a second compressor stage of the plurality of compressor stages, wherein the intercooler is configured to cool a first compressed air generated by the first compressor stage. ### Claim 9 (depends on 1) The system of claim 1, comprising a plurality of boilers coupled to the turbine section. ### Claim 10 (depends on 1) The system of claim 1, comprising a plurality of gas turbine engines coupled to the boiler. ### Claim 11 (depends on 1) The system of claim 1, wherein the compressor section comprises: a first compressor configured to generate an air flow; an intercooler coupled to the first compressor, wherein the intercooler is configured to cool the air flow; and a second compressor coupled to the intercooler, wherein the second compressor is configured to compress the air flow to generate the compressed air. ### Claim 12 (depends on 1) The system of claim 1, comprising a controller configured to control the boiler to increase a temperature of the exhaust gas. ### Claim 13 A system, comprising: a turbine controller configured to control a reheater to increase a temperature of an exhaust gas generated by a turbine coupled to the reheater, wherein the reheater is configured to combust a mixture comprising a first combustion gas and a fuel to generate a second combustion gas that is routed to the turbine to be expanded, and wherein the reheater generates steam from heat exchange with the second combustion gas. ### Claim 14 (depends on 13) The system of claim 13, wherein the reheater comprises: a combustor configured to combust the first combustion gas and the fuel to generate the second combustion gas, a superheater heat exchanger configured to generate a superheated steam from heat exchange with the second combustion gas, a reheater heat exchanger configured to generate a reheated steam from heat exchange with the second combustion gas, and a boiler heat exchanger configured to generate steam from heat exchange with the second combustion gas. ### Claim 15 (depends on 14) The system of claim 14, wherein the reheater comprises a plurality of combustors. ### Claim 16 (depends on 13) The system of claim 13, wherein the mixture comprises compressed air from a compressor section coupled to the turbine. ### Claim 17 A method, comprising: compressing air in a compressor section to generate compressed air; combusting a first mixture comprising the compressed air and a first fuel in a combustor coupled to the compressor section to generate a first combustion gas; expanding the first combustion gas in a turbine section coupled to the combustor to generate an exhaust gas; combusting a second mixture comprising a portion of the first combustion gas and a second fuel in a boiler coupled to the turbine section to generate a second combustion gas; routing the second combustion gas to the turbine section; and generating a first steam in the boiler by exchanging heat from the second combustion gas to a boiler feedwater. ### Claim 18 (depends on 17) The method of claim 17, comprising generating a superheated steam in the boiler by exchanging heat from the second combustion gas to an inlet steam. ### Claim 19 (depends on 17) The method of claim 17, comprising generating a second steam in a heat recovery steam generator (HRSG) from heat exchange with the exhaust gas. ### Claim 20 (depends on 17) The method of claim 17, wherein the turbine section comprises a plurality of turbine stages, wherein the boiler is coupled to a first turbine stage of the plurality of turbine stages, or a second turbine stage of the plurality of turbine stages, or both the first and second turbine stages of the plurality of turbine stages.