Method and apparatus for generating green electrical power. During a hydrogen gas storage mode, an electrolyzer generates a stream of hydrogen gas from water supplied by a water source and using power from an input power source. A hydrogen tank temporarily stores the stream of hydrogen. During a power generation mode, a fuel cell converts the stream of hydrogen gas from the tank into output electrical power by combining the hydrogen with oxygen. An inverter conditions and supplies the electrical power to a local load. A controller circuit uses a system parameter to adaptively switch between the storage mode and the power generation mode. In some cases, external power is supplied during the generation and storage of the hydrogen gas from an electrical grid or a local renewable source such as a set of solar panels. Respective grid-tied, solar-tied, grid-only, off-grid, and electric vehicle charging configurations are provided.

A propulsion system for an aircraft includes a fuel cell assembly, the fuel cell assembly including a fuel cell, and a turbomachine, the turbomachine including a compressor section, a combustor, and a turbine section arranged in serial flow order. The combustor is configured to receive a flow of fuel and further configured to receive output products from the fuel cell. A controller is configured to receive data indicative of an engine constraint of the turbomachine, determine that the engine constraint has achieved a fuel cell trim threshold; and perform a fuel cell corrective action with the fuel cell assembly in response to determining that the engine constraint has achieved the fuel cell trim threshold.

One aspect of the present disclosure is directed to a fuel cell power system. The system may include one or more fuel cells configured to generate electric power and a compressor configured to supply compressed air to the one or more fuel cells. The system may further include one or more sensors. The sensors may be configured to generate a signal indicative of at least one measured parameter of air flow across the one or more fuel cells. The system may also include a controller in communication with the one or more fuel cells, the compressor, and the sensors. The controller may be configured to determine a desired pressure drop based on at least one calculated parameter, determine a control command for the compressor based on the desired pressure drop, and adjust the control command based on a feedback gain parameter and a feed forward gain parameter.

Disclosed is a method of controlling an air supply system for a fuel cell. The air supply system includes a fuel cell stack, an air channel to supply air to an inlet of the fuel cell stack, a gas adsorption unit disposed on the air channel and configured to adsorb oxygen contained in air introduced into the air channel. In particular, the method includes: determining whether a power generation operation of the fuel cell stack is resumed; when the power generation operation of the fuel cell stack is resumed, controlling a voltage source to apply a voltage to the gas adsorption unit; and supplying air to the fuel cell stack through the air channel in a state in which the voltage is applied to the gas adsorption unit.

The control device is configured so that when a temperature of the fuel cell at the time of start of power generation of the fuel cell is less than a standard temperature, it makes the fuel cell generate power so that the amount of heat generation of the fuel cell accompanying the power generation loss becomes a first amount of heat generation and so that when a cumulative value of current of a time period during which the fuel cell is made to generate power so that the amount of heat generation becomes the first amount of heat generation is equal to or greater than a predetermined cumulative value, it makes the fuel cell generate power so that the amount of heat generation becomes a second amount of heat generation larger than the first amount of heat generation.

When a time point of occurrence of a stop state of a fuel cell system is predicted during traveling, a drying state control that causes a fuel cell stack to transition to a dry state is started a predetermined time (a required drying time) before the predicted time point of occurrence of the stop state.

An ECU of a fuel cell system supplies cathode gas by rotating an air pump at a low-load rotational speed and performs a low-load power generation in a fuel cell stack, while a moving body is traveling. When the fuel cell stack generates power while the moving body is stopped, the ECU increases the supply amount of the cathode gas by rotating the air pump at a during-stoppage-of-traveling rotational speed which is greater than the low-load rotational speed.

An ECU of a fuel cell system supplies cathode gas by rotating an air pump at a low-load rotational speed and performs a low-load power generation in a fuel cell stack, while a moving body is traveling. When the fuel cell stack generates power while the moving body is stopped, the ECU increases the supply amount of the cathode gas by rotating the air pump at a during-stoppage-of-traveling rotational speed which is greater than the low-load rotational speed.

A fuel cell system including: a fuel cell group; a refrigerant distribution passage; a pre-distribution refrigerant flow rate acquiring unit configured to acquire a first outlet temperature flow rate; a first outlet temperature detecting unit that is configured to detect a first outlet temperature; a voltage acquiring unit configured to acquire at least a first voltage that is a voltage of the first fuel cell; a current acquiring unit configured to acquire at least a first current; and a controller that calculates a first individual supply flow rate of the first fuel cell on the basis of the first voltage, the first current, and the first outlet temperature, and calculates a second individual supply flow rate of at least one second fuel cell other than the first fuel cell on the basis of the first individual supply flow rate and the pre-distribution refrigerant flow rate.

A system for capturing carbon dioxide in flue gas includes a fuel cell assembly including at least one fuel cell including a cathode portion configured to receive, as cathode inlet gas, the flue gas generated by the flue gas generating device or a derivative thereof, and to output cathode exhaust gas and an anode portion configure to receive an anode inlet gas and to output anode exhaust gas, a fuel cell assembly voltage monitor configured to measure a voltage across the fuel cell assembly, and a controller configured to receive the measured voltage across the fuel cell assembly from the fuel cell assembly voltage monitor, determine an estimated carbon dioxide utilization of the fuel cell assembly based on the measured voltage across the fuel cell assembly, and reduce the carbon dioxide utilization of the fuel cell assembly when the determined estimated carbon dioxide utilization is above a predetermined threshold utilization.