Abstract: A strut cover for a gas turbine includes: a cylindrical sheet metal member having a hollow portion; and a flare member that is connected to one end of the cylindrical sheet metal member in an axial direction of the cylindrical sheet metal member and includes a curved portion having an outer surface such that a distance from a center axis of the cylindrical sheet metal member to the outer surface increases with increasing a distance from the cylindrical sheet metal member in the axial direction. The flare member has a thickness larger than a minimum thickness of the cylindrical sheet metal member at least in the curved portion.

Abstract: A strut cover for a gas turbine includes: a cylindrical sheet metal member having a hollow portion; and a flare member that is connected to one end of the cylindrical sheet metal member in an axial direction of the cylindrical sheet metal member and includes a curved portion having an outer surface such that a distance from a center axis of the cylindrical sheet metal member to the outer surface increases with increasing a distance from the cylindrical sheet metal member in the axial direction. The flare member has a thickness larger than a minimum thickness of the cylindrical sheet metal member at least in the curved portion.

Abstract: A gas turbine is provided with an exhaust diffuser in which an exhaust flow path for circulating exhaust gas from a turbine is formed, and a cooling device for cooling a structure facing the exhaust flow path in the exhaust diffuser. The cooling device has a guide part in which a guide flow path for circulating a cooling medium is formed and which is configured to guide the cooling medium to the structure, and a switching part able to switch between a first state where a flow rate of the cooling medium flowing through the guide flow path is a first flow rate corresponding to a flow rate during a rated operation and a second state where the flow rate of the cooling medium is a second flow rate higher than the first flow rate.

Abstract: A gas turbine disk material according to the present invention contains: C: from 0.05 to 0.15%; Ni: from 0.25 to 1.50%; Cr: from 9.0 to 12.0%; Mo: from 0.50 to 0.90%; W: from 1.0 to 2.0%; V: from 0.10 to 0.30%; Nb: from 0.01 to 0.10%; Co: from 0.01 to 4.0%; B: from 0.0005 to 0.010%; N: from 0.01 to 0.05%; Mn: 0.40% or less; Si: 0.10% or less; and Al: 0.020% or less. A balance is of Fe and unavoidable impurities. Additionally, as a heat treatment method, a quenching temperature of a forged material having the component composition is set within a range from 1050 to 1150° C.

Abstract: A rotary machine, including: a rotor (2) extending in an axial direction, the rotor including a first thrust collar (35) and a second thrust collar (36) projecting radially outward; a first thrust bearing device (31) configured to receive load acting in the axial direction via the first thrust collar (35); a second thrust bearing device (32) configured to receive load acting in the axial direction via the second thrust collar (36); and a load control device (16) configured to control load acting on at least one of the first thrust bearing device (31) and the second thrust bearing device (32).

Abstract: A rotary machine, including: a rotor (2) extending in an axial direction, the rotor including a first thrust collar (35) and a second thrust collar (36) projecting radially outward; a first thrust bearing device (31) configured to receive load acting in the axial direction via the first thrust collar (35); a second thrust bearing device (32) configured to receive load acting in the axial direction via the second thrust collar (36); and a load control device (16) configured to control load acting on at least one of the first thrust bearing device (31) and the second thrust bearing device (32).

Abstract: A gas turbine is provided with an exhaust diffuser 5 in which an exhaust flow path Pe for circulating exhaust gas from a turbine is formed, and a cooling device 6 for cooling a structure facing the exhaust flow path Pe in the exhaust diffuser 5. The cooling device 6 has a guide part 7 in which a guide flow path Pg for circulating a cooling medium is formed and which guides the cooling medium to the structure, and a switching part 8 able to switch between a first state where a flow rate of the cooling medium flowing through the guide flow path Pg is a first flow rate corresponding to a flow rate during a rated operation and a second state where the flow rate of the cooling medium is a second flow rate higher than the first flow rate.

Abstract: A gas turbine plant associated with a solar thermal electric generation system has a heat receiver which receives heat from the sun, a gas turbine having a compressor and a turbine which operates with an operating fluid compressed by the compressor and heated by the heat receiver, a temperature sensor which detects heat from the sun, an auxiliary driving device which is driven based on the temperature of the heat detected by the temperature sensor, and which starts the gas turbine, and a generator which converts kinetic energy generated as a result of the rotation of the turbine into electric energy.

Abstract: A solar thermal receiver capable of improving the power generation efficiency in solar thermal power generation, reducing the production cost, and enhancing the thermal shock resistance and a solar thermal power generation facility using the solar thermal receiver are provided. The solar thermal receiver that receives solar radiation to heat fluid includes a heat-receiving section that is made of metal and that constitutes a flow path in which at least the fluid flows; and a coating layer that is disposed on at least a surface of an area of the heat-receiving section irradiated with the sunlight, that absorbs energy of the sunlight, and that has heat resistance.