# US 10,309,245 B2 · Gas turbine and operating method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,309,245 B2 - Document ID: US10309245B2 - Status: Granted - Kind: B2 - Application number: 14/843,732 - Filed: 2015-09-02 - Published: 2015-12-31 - Granted: 2019-06-04 - Earliest claimed: 2008-10-08 - Assignees: Mitsubishi Heavy Industries, Ltd.; Tohoku Electric Power Co., Inc. - Applicants: Mitsubishi Heavy Industries, Ltd.; Tohoku Electric Power Company, Inc. - Inventors: Satoshi Mizukami; Tatsuo Ishiguro; Junichiro Masada; Kazumasa Takata; Yuya Fukunaga; Hiroki Takahashi; Masaki Satoh; Yoshiaki Nishimura; Norio Oogai; Souji Hasegawa; Masato Hayashi - Web page: https://patentgrep.com/patent/US10309245B2 ## CPC - F01D 11/24: by selectively cooling-heating stator or rotor components - F01D 21/00: Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for - F01D 21/12: responsive to temperature - F02C 7/08: Heating air supply before combustion, e.g. by exhaust gases - F02C 7/18: the medium being gaseous, e.g. air {(F02C7/125 takes precedence)} - F02C 7/12: Cooling of plants (of component parts, see the relevant subclasses, e.g. F01D; cooling of engines in general F01P) - F05D 2260/205: Cooling fluid recirculation, i.e. after cooling one or more components is the cooling fluid recovered and used elsewhere for other purposes - F05D 2260/608: Aeration, ventilation, dehumidification or moisture removal of closed spaces - 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 ## Abstract Provided is a gas turbine capable of achieving high-speed startup of the gas turbine through quick operation control of an ACC system during startup of the gas turbine, improving the cooling efficiency of turbine stationary components, and quickly carrying out an operation required for cat back prevention during shutdown of the gas turbine. Included are a pressurizing device (40) connected to a branching channel (42) branching from the discharge side of a compressor (11) and capable of carrying out an operation for introducing and pressurizing air independently from the compressor (11); a temperature-control-medium supply channel (43) that guides compressed air pressurized at the pressuring device (40) to a turbine-cooling-medium channel (50) provided in stationary components of a turbine (13); and a temperature-control-medium return channel (44) that guides the compressed air that has passed through the turbine-cooling-medium channel (50) to the discharge side of the compressor (11) such that the flows are combined, and the pressurizing device (40) is operated at startup of the gas turbine and in preparation immediately before startup to carry out temperature-raising and cooling by letting the compressed air flow in the turbine-cooling-medium channel (50). The pressurizing device (40) is operated during shutdown of the gas turbine to exhaust the high-temperature gas remaining in the turbine (13). ## Claims ### Claim 1 A gas turbine that supplies combustion gas generated by supplying fuel to a combustor where the fuel is combusted with compressed air compressed at a compressor to a turbine to acquire rotational power, the gas turbine comprising: a pressurizing device connected to a branching channel branching from a discharge-side channel of the compressor and capable of carrying out an operation for introducing and pressurizing a temperature-control medium independently from the compressor; a temperature-control-medium supply channel that guides pressurized temperature-control medium pressurized at the pressurizing device to a turbine-cooling-medium channel provided in a stationary component of the turbine; a temperature-control-medium return channel that guides the pressurized temperature-control medium that has passed through the turbine-cooling-medium channel to the discharge-side channel, a first exhaust channel for guiding a gas in the turbine to the combustor, and a gas supply channel for guiding the gas, the gas being guided to the combustor through the first exhaust channel, from the combustor to the discharge-side channel of the compressor, wherein a ventilation cooling system in which the pressurizing device is operated to exhaust high-temperature gas remaining in the turbine to atmosphere is provided, wherein the ventilation cooling system includes a second exhaust channel branching from the branching channel or the temperature-control-medium supply channel, wherein the temperature-control-medium return channel and the gas supply channel are merged downstream of the compressor in the discharge-side channel of the compressor. ### Claim 2 (depends on 1) The gas turbine according to claim 1, wherein the ventilation cooling system includes a channel opening/closing valve provided in the temperature-control-medium supply channel downstream of a branching point of the exhaust channel. ### Claim 3 (depends on 1) The gas turbine according to claim 1, wherein the ventilation cooling system includes an exhaust channel branching from the branching channel and having channel opening/closing valve. ### Claim 4 A gas turbine that supplies combustion gas generated by supplying fuel to a combustor where the fuel is combusted with compressed air compressed at a compressor to a turbine to acquire rotational power, the gas turbine comprising: a pressurizing device connected to a branching channel branching from a discharge-side channel of the compressor and capable of carrying out an operation for introducing and pressurizing a temperature-control medium independently from the compressor; a temperature-control-medium supply channel that guides pressurized temperature-control medium pressurized at the pressurizing device to a turbine-cooling-medium channel provided in a stationary component of the turbine; a temperature-control-medium return channel that guides the pressurized temperature-control medium that has passed through the turbine-cooling-medium channel to the discharge-side channel, an exhaust channel for guiding a gas in the turbine to the combustor, and a gas supply channel for guiding the gas, the gas being guided to the combustor through the exhaust channel, from the combustor to the discharge-side channel of the compressor, wherein the pressurizing device is operated to let the pressurized temperature-control medium flow in the turbine-cooling-medium channel, wherein the temperature-control-medium return channel and the gas supply channel are merged downstream of the compressor in the discharge-side channel of the compressor. ### Claim 5 A shutdown operating method for a gas turbine that supplies combustion gas generated by supplying fuel to a combustor where the fuel is combusted with compressed air compressed at a compressor to a turbine to acquire rotational power, the shutdown operating method, which is carried out at shutdown of the gas turbine, comprising: a step in which pressurizing device, which is connected to a branching channel branching from a discharge-side channel of the compressor and capable of carrying out an operation independently from the compressor, is operated, and introduces and pressurizes a temperature-control medium; a step in which pressurized temperature-control medium pressurized at the pressurizing device returns to the discharge-side channel of the compressor via a temperature-control-medium supply channel, a turbine-cooling-medium channel, and a temperature-control-medium return channel such that the pressurized temperature-control medium and compressed-air from the compressor are combined downstream of the compressor in the discharge-side channel of the compressor; and a step in which high-temperature gas remaining in the turbine passes through the combustor, flows into the discharge-side channel of the compressor, and is exhausted to an atmosphere from an exhaust channel. ### Claim 6 A shutdown operating method for a gas turbine that supplies combustion gas generated by supplying fuel to a combustor where the fuel is combusted with compressed air compressed at a compressor to a turbine to acquire rotational power, the shutdown operating method, which is carried out at shutdown of the gas turbine, comprising: a step in which pressurizing device, which is connected to a branching channel branching from a discharge-side channel of the compressor and capable of carrying out an operation independently from the compressor, is operated, and introduces and pressurizes a temperature-control medium; a step in which pressurized temperature-control medium pressurized at the pressurizing device returns to the discharge-side channel of the compressor via a temperature-control-medium supply channel, a turbine-cooling-medium channel, and a temperature-control-medium return channel such that the pressurized temperature-control medium and compressed-air from the compressor are combined downstream of the compressor in the discharge-side channel of the compressor; and a step in which high-temperature gas remaining in the turbine is taken into the pressurizing device through the combustor and the branching channel, by carrying out an operation of the pressurizing device.