Abstract: The purpose of the present invention is to provide fuel cell system capable of stable start-up and method for starting the fuel cell system. Fuel cell system includes SOFC, a turbocharger, oxidizing gas supply line, a control valve, oxidizing gas blow line, start-up air line for supplying the start-up air to the oxidizing gas supply line with a blower, and a control unit that, in state in which the control valve is closed and the blow valve is opened to supply the start-up air to the oxidizing gas supply line with the blower when the turbocharger is started, decreases the opening of the blow valve and, after the timing at which the opening of the blow valve starts to decrease, increases the opening of the control valve and then stops the supply of the starting air.

Abstract: The purpose of the present invention is to provide: fuel cell system that can further stabilize an operation of the system; and control method thereof. Fuel cell system comprises: fuel cell; a turbocharger; oxidizing gas supply line that supplies, to cathode, oxidizing gas compressed by a compressor; a heat exchanger that heats the oxidizing gas of the oxidizing gas supply line by means of exhaust gas discharged from a turbine, and flows the exhaust gas to combustion exhaust gas line; bypass lines each having one end connected to the upstream side of the heat exchanger in the oxidizing gas supply line and bypassing the oxidizing gas; flow rate regulating valves provided in the bypass lines; and a control unit that controls the flow rate regulating valves on the basis of the ambient air temperature, and controls the bypass flow rate of the oxidizing gas.

Abstract: A fuel cell system includes: a fuel cell including a fuel electrode and an air electrode; a fuel electrode fuel line configured to supply fuel gas to the fuel electrode; a polluted exhaust line configured to supply polluted exhaust containing contaminants discharged from a facility to the air electrode; and an air electrode fuel line configured to supply fuel gas to the air electrode.

Abstract: A fuel cell power generation system includes: a fuel cell; at least one compressor disposed on an oxidant supply line for supplying an oxidizing gas to the fuel cell; a first motor configured to drive a first compressor among the at least one compressor; and at least one power converter disposed between the first motor and a power grid, and capable of adjusting a torque of the first motor.

Abstract: A fuel cell power generation system is provided with: at least one fuel cell module each of which includes a fuel cell having a fuel-side electrode, an electrolyte, and an oxygen-side electrode; at least one fuel supply line for supplying a fuel gas to the fuel-side electrode included in the at least one fuel cell module; at least one oxidizing gas supply line for supplying an oxidizing gas to the oxygen-side electrode included in the at least one fuel cell module; and a most downstream exhaust fuel gas line through which an exhaust fuel gas discharged from a most downstream module that is disposed most downstream in a flow of the fuel gas among the at least one fuel cell module flows. The most downstream exhaust fuel gas line is configured to supply the exhaust fuel gas to the oxygen-side electrode included in any of the fuel cell modules.

Abstract: A pressurized air supply system supplies, to a pressurization object device, flowing air that includes at least one of compressed air, which is generated by compressing air supplied from an air supply source, or discharged air from a turbocharger compressor forming a turbocharger. The compressor is controlled such that a saturated steam temperature of the flowing air supplied from the air supply source to the pressurization object device is lower than a temperature in the pressurization object device, at startup.

Abstract: The purpose of the present invention is to provide fuel cell system capable of stable start-up and method for starting the fuel cell system. Fuel cell system includes SOFC, a turbocharger, oxidizing gas supply line, a control valve, oxidizing gas blow line, start-up air line for supplying the start-up air to the oxidizing gas supply line with a blower, and a control unit that, in state in which the control valve is closed and the blow valve is opened to supply the start-up air to the oxidizing gas supply line with the blower when the turbocharger is started, decreases the opening of the blow valve and, after the timing at which the opening of the blow valve starts to decrease, increases the opening of the control valve and then stops the supply of the starting air.

Abstract: The purpose of the present invention is to provide fuel cell system capable of stably executing differential pressure control and having a simplified configuration, and method for controlling the same. Fuel cell system equipped with fuel cell, a turbocharger, exhaust fuel gas line, exhaust oxidizing gas line, combustion gas supply line for supplying combustion gas discharged from a combustor to a turbine, oxidizing gas supply line for supplying oxidizing gas compressed by a compressor to cathode, a regulator valve provided to the exhaust fuel gas line, and a control unit for controlling the differential pressure between the pressure of the cathode of the fuel cell and the pressure of the anode thereof by controlling the regulator valve, wherein the exhaust oxidizing gas line is not provided with venting system for discharging exhaust oxidizing gas outside the system.

Abstract: The purpose of the present invention is to provide: fuel cell system that can further stabilize an operation of the system; and control method thereof. Fuel cell system comprises: fuel cell; a turbocharger; oxidizing gas supply line that supplies, to cathode, oxidizing gas compressed by a compressor; a heat exchanger that heats the oxidizing gas of the oxidizing gas supply line by means of exhaust gas discharged from a turbine, and flows the exhaust gas to combustion exhaust gas line; bypass lines each having one end connected to the upstream side of the heat exchanger in the oxidizing gas supply line and bypassing the oxidizing gas; flow rate regulating valves provided in the bypass lines; and a control unit that controls the flow rate regulating valves on the basis of the ambient air temperature, and controls the bypass flow rate of the oxidizing gas.

Abstract: A pressurized air supply system includes a turbocharger including a turbine and a compressor, a recuperator for heat exchange between discharged air from the compressor and flue gas exhausted from the turbine, a start-up heater for heating the air, that includes at least either of start-up air or pressurized air from the compressor, which is supplied to discharged air line between the compressor outlet and the recuperator, and a catalytic combustor for supplying, to the turbine, combustion gas which is generated by combustion of fuel with the flowing air heated by the start-up heater.

Abstract: A fuel cell power generation system includes a first fuel cell and a second fuel cell generating power using a second fuel gas exhausted from the first fuel cell. A regulating valve is used for regulating a supply amount of an oxidant gas to be supplied to the second fuel cell in such a manner that a temperature at the second fuel cell becomes a reference value.

Abstract: The invention aims to shorten the time required for start-up and prevent excessive increases in the heat loads on turbine blades.

Abstract: A thermal power plant for recovering water from exhaust gas includes a gas turbine, a heat recovery steam generator for generating steam by supplying exhaust combustion gas exhausted from the gas turbine as heat source, a water recovery system installed on the downstream side of the heat recovery steam generator, a recovered water system for supplying a part of the water recovered by the water recovery system, allowing the water to be circulating as circulating water, a feed water system for supplying the heat recovery steam generator with other part of the water recovered by the water recovery system as feed water, pH adjusting systems, and a control system for controlling the volumes of pH adjusters supplied from the first and second pH adjusting systems.

Abstract: The invention aims to shorten the time required for start-up and prevent excessive increases in the heat loads on turbine blades.

Abstract: A thermal power plant for recovering water from exhaust gas comprising: a gas turbine; a heat recovery steam generator for generating steam by supplying exhaust combustion gas exhausted from the gas turbine as heat source; a water recovery system installed on the downstream side of the heat recovery steam generator for condensing and recovering water in the exhaust combustion gas through direct gas/liquid contact between the exhaust combustion gas coming down from the heat recovery steam generator and water; a recovered water system for supplying a part of the water recovered by the water recovery system, thereby allowing the water to be circulating as circulating water; a feed water system for supplying the heat recovery steam generator with other part of the water recovered by the water recovery system as feed water; a first pH adjusting system installed in the recovered water system to adjust the circulating water flowing through the recovered water system to a first pH value (hydrogen ion concentration in

Abstract: Quick recovery or recovery support of a faulty power generating facility by real time diagnoses such as facility failure diagnosis, supervision for failure symptoms, facility diagnosis by evaluation of performance using databases between the power generating facilities and an operation control system. The operation control system transfers information on operating status and secular characteristic changes of apparatus from power generating facilities or information from operators of selected power generating facilities. The level of a failure of a power generating facility which has a failure is evaluated and repairing information (e.g. recovery procedures, processes, required parts, inventory of the parts, possible failure causes, etc.) is automatically created from repairing information prepared in advance for each evaluation condition. The repairing information is then sent to the operation supporting section of the power generating facility.

Abstract: A permanent magnet electrical rotating machine having a permanent magnet rotor and a stator, wherein: a plurality of permanent magnets are disposed in a rotor iron core of the permanent magnet rotor along a periphery of the rotor iron core, polarities thereof being alternately changed; a cooling airflow channel is formed between each pair of adjacent opposite poles on the rotor iron core; and the cooling airflow channel has an approximately trapezoidal shape on an outer periphery side of the rotor iron core; and extends from an end on a central side in a radial direction of the approximately trapezoidal shape to a radial center.

Abstract: A permanent magnet electrical rotating machine having a permanent magnet rotor and a stator, wherein: a plurality of permanent magnets are disposed in a rotor iron core of the permanent magnet rotor along a periphery of the rotor iron core, polarities thereof being alternately changed; a cooling airflow channel is formed between each pair of adjacent opposite poles on the rotor iron core; and the cooling airflow channel has an approximately trapezoidal shape on an outer periphery side of the rotor iron core; and extends from an end on a central side in a radial direction of the approximately trapezoidal shape to a radial center.

Abstract: A permanent magnet electrical rotating machine having a permanent magnet rotor and a stator, wherein: a plurality of permanent magnets are disposed in a rotor iron core of the permanent magnet rotor along a periphery of the rotor iron core, polarities thereof being alternately changed; a cooling airflow channel is formed between each pair of adjacent opposite poles on the rotor iron core; and the cooling airflow channel has an approximately trapezoidal shape on an outer periphery side of the rotor iron core; and extends from an end on a central side in a radial direction of the approximately trapezoidal shape to a radial center.

Abstract: In a sealed type electric rotating machine, in which a cooling medium inflows from both end sides of a rotating shaft of a claw-pole type rotor, a cooling medium having passed through a heat exchanging part divides into one on an exhaust side and one on an intake air side to be used again for cooling of the claw-pole type rotor and a stator. On the exhaust side, a cooling medium being high in temperature as compared with that on the intake air side performs cooling, and the rotor and the stator are made higher in temperature on the exhaust side than on the intake air side. In order to level temperature profiles of the claw-pole type rotor and the stator in an axial direction, a partition, which cuts off an axial duct, is provided toward the exhaust side relative to a center in the axial direction.