Abstract: A lean fuel intake gas turbine engine includes a compressor to compress a working gas at a concentration equal to or lower than the flammable limit concentration to thereby generate a compressed gas, a catalytic combustor to burn the compressed gas through a catalytic reaction, a turbine driven by a combustion gas from the catalytic combustor, a heat exchanger to heat, by means of an exhaust gas from the turbine, the compressed gas that is introduced from the compressor into the catalytic combustor, a heat exchanger bypass valve to communicate between inlet and outlet sides of the heat exchanger, a first catalyst outlet temperature control unit to open the heat exchanger bypass valve in the event that the outlet temperature of the catalytic combustor attains a value equal to or higher than an outlet prescribed value.

Abstract: A catalytic combustor (2) in a gas turbine engine (GT) includes a casing (54) for accommodating a catalyst carrier (10) therein, a catalyst retaining body (62) interposed between the casing (54) and the catalyst carrier (10) for retaining an outer peripheral surface of the catalyst carrier (10) to an inner peripheral surface of the casing (54) and also for preventing a gas (G2) from leaking in a downstream direction through an outer periphery of the catalyst carrier (10), a support material (64) disposed on a downstream side of the direction of flow of the gas to be treated in the catalyst carrier (10) for holding the catalyst carrier (10), and a downstream side regulating member (72) disposed on the downstream side of the catalyst retaining body (62) for avoiding a movement of the catalyst retaining body (62) in a direction of flow of the gas (G2).

Abstract: A catalytic combustor (2) for use in a gas turbine engine (GT) includes catalyst units (U1, U2, U3) in a multistage. The catalyst unit (U1, U2, U3) in each stage includes a support material (64) for supporting the respective catalyst unit (U1, U2, U3) against the pressure of a gas. The catalyst unit (U1, U2, U3) in each stage is unitized together with the support material (64) and the catalyst units (U1, U2, U3) are removably fitted to a combustor housing (50).

Abstract: An apparatus for equalizing flow velocity distribution of a fuel gas supplied into a catalytic combustor includes a rectification vane and a rectification plate in an inlet chamber of the catalyst combustor. The inlet chamber has a round transverse sectional shape and includes an inflow port that allows the fuel gas to inflow radially, and an outflow port for discarding the fuel gas axially. The rectification vane has a front edge oriented towards the inflow port, and a rectifying surface ramified from the front edge so as to extend towards a cylindrical inner wall surface of the inlet chamber such that swirling flow of the fuel gas flown into the inlet chamber, that flows towards the inflow port along the cylindrical inner wall surface, is generated. The rectification plate is located at the outflow port and has openings for allowing the fuel gas to flow therethrough.

Abstract: A method of starting a gas turbine engine includes a primary warming step of warming a heat exchanger (6) by means of a compressed gas (G1) while with the use of an inverter motor (IM) the rotation speed of the engine is maintained at a partial rotation speed, a secondary warming step of warming the heat exchanger (6) by activating a main combustor (2) to gradually increase the temperature of an exhaust gas (G3) while with the use of the inverter motor (IM) the rotation speed is maintained at the partial rotation speed, and a speed increasing step of increasing the rotation speed to the rated rotation speed with the use of the inverter motor (IM) while the fuel burning amount of the main combustor (2) is increased.

Abstract: A method and a device for controlling a lean fuel intake gas turbine engine, which can stably maintain operation of the gas turbine engine by preventing misfire and burnout of a catalytic combustor even when a catalyst in the combustor is deteriorated. A difference between measured temperatures of an inlet and an outlet of the combustor with respect to a methane concentration in an intake gas that is to be taken into the lean fuel intake gas turbine engine is compared with reference temperature difference data that is data indicating difference between temperatures of the inlet and the outlet of the combustor including a catalyst in its initial state to be a reference, and at least one of the inlet temperature and the outlet temperature of the combustor is controlled based on a difference between the measured temperature difference and the reference temperature difference data.

Abstract: A lean fuel intake gas turbine which uses, as a working gas, a mixed gas having a concentration equal to or lower than a flammability limiting concentration and obtained by mixing two types of fuel gases having different fuel concentrations, includes a first mixer configured to mix a second fuel gas having a higher fuel concentration with a first fuel gas having a lower fuel concentration, of the two types of the fuel gases having different fuel concentrations, to generate a first stage mixed gas and a second mixer configured to further mix the second fuel gas with the first stage mixed gas to generate a second stage mixed gas which is the working gas.