Abstract: The fuel cell system includes a fuel cell, a first injection device associated with a supply of a fuel to the fuel cell, and a second injection device provided on an upstream side of the first injection device in a fuel flow passage from a fuel storage unit to the first injection device. The first and second injection devices switch a flow passage extending downstream from the fuel flow passage, between a first flow passage via the first injection device and second flow passage via the second injection device. The second injection device operates at a lower frequency than the first injection device during an operation of the fuel system.

Abstract: A method for controlling a catalytic combustion apparatus having a heater capable of heating fuel to be supplied to a catalyst includes a step of supplying oxidant gas to the catalytic combustion apparatus, and an injection step of injecting the fuel into the catalytic combustion apparatus. The injection step also includes an electric power feeding step of supplying electric power to the heater, and a setting step of setting an injection amount of the fuel to be injected into the catalytic combustion apparatus in response to output of the heater.

Abstract: A fuel cell system includes a fuel cell configured to generate electricity by receiving a working gas, a combustor configured to combust an off-gas discharged from the fuel cell, a heat exchange device configured to supply the working gas to the fuel cell, and perform heat exchange with a discharged gas from the combustor, and a manifold disposed between the fuel cell and the combustor, and between the fuel cell and the heat exchange device. The manifold includes an off-gas flow path along which the off-gas discharged from the fuel cell is guided to the combustor and a discharged gas flow path along which the discharged gas discharged from the combustor is guided to the heat exchange device.

Abstract: A combustor, including: a catalyst bed portion supporting a catalyst capable of promoting a combustion reaction of fuel; a vaporizer which is arranged on the downstream side of the catalyst bed portion with respect to a flow of the fuel going through the catalyst bed portion and is configured to be able to use a combustion gas generated from the combustion reaction as a hot fluid; a manifold portion which is outside the catalyst bed portion and guides air in a direction opposite to the flow of the fuel going through the catalyst bed portion and has a wall portion on which a sidewall of the vaporizer is projected; and a fuel introducing portion configured to penetrate the wall portion of the manifold portion so that the fuel evaporated by the vaporizer can be introduced into the manifold portion.

Abstract: A method for controlling a catalytic combustion apparatus having a heater capable of heating fuel to be supplied to a catalyst includes a step of supplying oxidant gas to the catalytic combustion apparatus, and an injection step of injecting the fuel into the catalytic combustion apparatus. The injection step also includes an electric power feeding step of supplying electric power to the heater, and a setting step of setting an injection amount of the fuel to be injected into the catalytic combustion apparatus in response to output of the heater.

Abstract: The fuel cell system includes a fuel cell, a first injection device associated with a supply of a fuel to the fuel cell, and a second injection device provided on an upstream side of the first injection device in a fuel flow passage from a fuel storage unit to the first injection device. The first and second injection devices switch a flow passage extending downstream from the fuel flow passage, between a first flow passage via the first injection device and second flow passage via the second injection device. The second injection device operates at a lower frequency than the first injection device during an operation of the fuel system.

Abstract: A fuel cell system including a fuel cell; a first combustor coupled to a discharged air side of the fuel cell; a heating device that heats the first combustor; and a warming-up control unit that performs a warming-up control of the fuel cell after warming up the first combustor by the heating device.

Abstract: A method for controlling a fuel cell system is a method for controlling a fuel cell system including a solid oxide fuel cell which generates a power upon receiving supplies of an anode gas and a cathode gas. The method for controlling the fuel cell system includes; as a stop control of the fuel cell, stopping a supply of the anode gas while continuing a supply of the cathode gas to the fuel cell, and shutting off a discharge side of an anode of the fuel cell; and carrying out an additional control to supply the anode gas to the fuel cell during the stop control and/or an additional control to decrease the flow rate of the cathode gas during the stop control.

Abstract: A fuel cell system includes a fuel cell stack configured to generate power according to a load, a fuel tank configured to store fuel gas, a pressure regulating valve configured to regulate a pressure of the fuel gas supplied from the fuel tank to the fuel cell stack, a purge valve configured to purge the fuel gas discharged from the fuel cell stack and a controller for controlling the system. The controller includes a pulsating unit configured to cause a fuel gas pressure of the fuel cell stack to pulsate, and a pressure increasing rate setting unit configured to set a pressure increasing rate of the pulsation of the fuel gas pressure according to an operating state.

Abstract: A fuel cell system includes a solid oxide fuel cell configured to receive a supply of an anode gas and a cathode gas to generate electric power. The fuel cell system includes an anode discharge passage through which an anode off-gas discharged from the fuel cell flows, a cathode discharge passage through which a cathode off-gas discharged from the fuel cell flows, a joining portion where the anode discharge passage and the cathode discharge passage join. The fuel cell system further includes a gas supply unit configured to supply a fuel gas using a fuel stored in a fuel tank into the anode discharge passage during a system stop.

Abstract: A fuel cell system including a fuel cell; a first combustor coupled to a discharged air side of the fuel cell; a heating device that heats the first combustor; and a warming-up control unit that performs a warming-up control of the fuel cell after warming up the first combustor by the heating device.

Abstract: A method for controlling a fuel cell system is a method for controlling a fuel cell system including a solid oxide fuel cell which generates a power upon receiving supplies of an anode gas and a cathode gas. The method for controlling the fuel cell system includes; as a stop control of the fuel cell, stopping a supply of the anode gas while continuing a supply of the cathode gas to the fuel cell, and shutting off a discharge side of an anode of the fuel cell; and carrying out an additional control to supply the anode gas to the fuel cell during the stop control and/or an additional control to decrease the flow rate of the cathode gas during the stop control.

Abstract: A fuel cell system includes a solid oxide fuel cell configured to receive a supply of an anode gas and a cathode gas to generate electric power. The fuel cell system includes an anode discharge passage through which an anode off-gas discharged from the fuel cell flows, a cathode discharge passage through which a cathode off-gas discharged from the fuel cell flows, a joining portion where the anode discharge passage and the cathode discharge passage join. The fuel cell system further includes a gas supply unit configured to supply a fuel gas using a fuel stored in a fuel tank into the anode discharge passage during a system stop.

Abstract: A fuel cell system includes a fuel cell, a control valve and a controller. The fuel cell is configured to receive anode gas and cathode gas to generate electric power. The control valve is configured to control pressure of the anode gas being fed to the fuel cell through an anode flow channel. The controller controls the control valve to periodically increase and decrease the pressure of the anode gas flowing through the anode flow channel in an area downstream of the control valve. The controller sets an anode pressure differential value for the anode gas resulting from periodic increasing and decreasing of the pressure of the anode gas based on a requested fuel cell output. The controller determines a quantity of liquid in the anode flow channel. The controller decreases the anode pressure differential value that was set based on the requested fuel cell output.

Abstract: A fuel cell system is basically provided with a fuel cell, a pressure adjusting valve, a purge valve and an anode pressure controller. The fuel cell includes an anode that receives an anode gas and a cathode that receives a cathode gas to generate electric power corresponding to a load. The pressure adjusting valve is disposed in a supply path to adjust anode gas pressure to the anode. The purge valve is disposed in a discharging flow path to discharge an anode-off gas containing impurities from the fuel cell. The anode pressure controller is configured to control the pressure adjusting valve to perform a pulsation operation that pulsates the anode gas pressure of the fuel cell. The anode pressure controller decreases a median pressure of the pulsation operation as a wetness level of an electrolyte membrane of the fuel cell stack is determined to become higher.

Abstract: A fuel cell system includes a fuel cell stack configured to generate power according to a load, a fuel tank configured to store fuel gas, a pressure regulating valve configured to regulate a pressure of the fuel gas supplied from the fuel tank to the fuel cell stack, a purge valve configured to purge the fuel gas discharged from the fuel cell stack and a controller for controlling the system. The controller includes a pulsating unit configured to cause a fuel gas pressure of the fuel cell stack to pulsate, and a pressure increasing rate setting unit configured to set a pressure increasing rate of the pulsation of the fuel gas pressure according to an operating state.

Abstract: At a start of a fuel cell, discharge of a generated water is ended at a proper timing. Supply of the reactive gas is started at a first flowrate. Then, in a case that the generated water retained by a reactive electrode is determined to outflow to an internal gas flow channel side among unit cells more than or equal to a preset determination cell number, the flowrate of the reactive gas is changed to a second flowrate that is smaller than the first flowrate.

Abstract: A fuel cell system including a plurality of single-cell units, each of which include an electrolyte membrane disposed between an anode and a cathode and which generate electric power by a reaction of a fuel gas in the anode and an oxidizer gas in the cathode, and a fuel cell in-which the plurality of single-cell units are stacked. A plurality of voltage measurement devices measure the voltages of the single-cell units, respectively. A control unit determines the humidification state of the fuel cell based on the voltage of a second single-cell unit wherein when the voltage of the second single-cell is equal to or lower than an insufficient-humidification-determining voltage which is higher than the predetermined voltage the control unit determines that humidification of the fuel cell is insufficient, disposed in the vicinity of a first single-cell unit, the first single-cell unit having a voltage that is equal to or lower than a predetermined voltage.

Abstract: A fuel cell system is basically provided with a fuel cell, a pressure adjusting valve, a purge valve and an anode pressure controller. The fuel cell includes an anode that receives an anode gas and a cathode that receives a cathode gas to generate electric power corresponding to a load. The pressure adjusting valve is disposed in a supply path to adjust anode gas pressure to the anode. The purge valve is disposed in a discharging flow path to discharge an anode-off gas containing impurities from the fuel cell. The anode pressure controller is configured to control the pressure adjusting valve to perform a pulsation operation that pulsates the anode gas pressure of the fuel cell. The anode pressure controller decreases a median pressure of the pulsation operation as a wetness level of an electrolyte membrane of the fuel cell stack is determined to become higher.

Abstract: A fuel cell system has a plurality of fuel cells stacked in one or more groups of fuel cells. Each fuel cell includes a fuel electrode supplied with fuel gas at a fuel gas supply pressure, an oxidizing electrode supplied with oxidizing gas at an oxidizing gas supply pressure, and an electrolyte membrane disposed between the fuel electrode and the oxidizing electrode. A pressure-difference control unit generates a pressure difference across the membrane such that the fuel gas supply pressure is greater than the oxidizing gas supply pressure in each fuel cell, a cell-voltage measuring device measures a cell voltage for each fuel cell or each group of fuel cells in the fuel cell stack, and a leakage determination unit determines the presence or absence of a leaking cell based on the behavior of the cell voltage of each fuel cell while the pressure difference is increased with time.