Abstract: An apparatus for splitting the power of fuel cell systems in a vehicle comprises: a first fuel cell system and at least one further fuel cell system, which are configured to convert hydrogen and oxygen into water in order to generate electrical energy therefrom, and a controller unit, which is configured to actuate the first fuel cell system and the further fuel cell system with an electrical signal. The apparatus is configured to actuate the first fuel cell system and the further fuel cell system with the electrical signal in time offset fashion.

Abstract: The invention relates to a starting method for a fuel cell system (100), particularly for an air/air start of the fuel cell system (100). The method enables the reduction of damaging half-cell voltages in the fuel cell stack (10) through voltage limitation by means of a DC voltage converter. The homogeneous flushing of the fuel cell stack (10) required for this takes place by means of introduction of an anode operating medium into an anode inlet channel (17) of the otherwise sealed fuel cell stack (10) until a predetermined pressure is reached and flushing of the active areas of the fuel cells (11) of the stack (10) after said pressure is reached through opening of an anode discharge adjusting aid (26), preferably arranged in an exhaust coupling (29) connecting the anode exhaust line (22) and the cathode exhaust line (31).

Abstract: A fuel cell device (1) including an anode-gas path (3) and a method for operating a fuel cell device (1). In order to wet an anode of the fuel cell device (1) in a simple manner, an anode-gas drainage section (13) of the fuel cell device (1) is connected to an anode-gas supply section (7) of the fuel cell device (1) in a water-conducting manner and water is added to an anode-gas that is carried to the fuel cell (2).

Abstract: A method for changing a fuel cell system from a normal mode of operation over to a standby mode comprises the following steps: a) reducing the load withdrawal—via the electric circuit of the fuel cell stack—down to a load within the range from ?1% to +5% around a load with an optimal system efficiency, b) regulating down the anode pressure down via the anode supply system, c) in the meantime, maintaining and controlling the cathode gas feed via the cathode supply system so that the pressure differential between the anode spaces and the cathode spaces does not exceed a prescribed maximum pressure differential, d) switching off the cathode gas feed if the pressure differential between the anode spaces and of the fuel cell stack and the environment has reached the prescribed maximum pressure differential, and e) switching off the load withdrawal via the external electric circuit at the latest when a prescribed minimum limit voltage of the fuel cell stack has been reached.

Abstract: The invention relates to a starting method for a fuel cell system (100), particularly for an air/air start of the fuel cell system (100). The method enables the reduction of damaging half-cell voltages in the fuel cell stack (10) through voltage limitation by means of a DC voltage converter. The homogeneous flushing of the fuel cell stack (10) required for this takes place by means of introduction of an anode operating medium into an anode inlet channel (17) of the otherwise sealed fuel cell stack (10) until a predetermined pressure is reached and flushing of the active areas of the fuel cells (11) of the stack (10) after said pressure is reached through opening of an anode discharge adjusting aid (26), preferably arranged in an exhaust coupling (29) connecting the anode exhaust line (22) and the cathode exhaust line (31).

Abstract: A fuel cell device (1) including an anode-gas path (3) and a method for operating a fuel cell device (1). In order to wet an anode of the fuel cell device (1) in a simple manner, an anode-gas drainage section (13) of the fuel cell device (1) is connected to an anode-gas supply section (7) of the fuel cell device (1) in a water-conducting manner and water is added to an anode-gas that is carried to the fuel cell (2).

Abstract: A method for changing a fuel cell system from a normal mode of operation over to a standby mode comprises the following steps: a) reducing the load withdrawal—via the electric circuit of the fuel cell stack—down to a load within the range from ?1% to +5% around a load with an optimal system efficiency, b) regulating down the anode pressure down via the anode supply system, c) in the meantime, maintaining and controlling the cathode gas feed via the cathode supply system so that the pressure differential between the anode spaces and the cathode spaces does not exceed a prescribed maximum pressure differential, d) switching off the cathode gas feed if the pressure differential between the anode spaces and of the fuel cell stack and the environment has reached the prescribed maximum pressure differential, and e) switching off the load withdrawal via the external electric circuit at the latest when a prescribed minimum limit voltage of the fuel cell stack has been reached.

Abstract: An aircraft fuel cell system includes a fuel cell which has an oxidant inlet for supplying an oxygen-containing medium to the fuel cell. An oxidant supply line has a first end which is connected to the oxidant inlet of the fuel cell. A second end of the oxidant supply line is connectable to a used air outlet of a cabin of the aircraft. A heat exchanger is located in the oxidant supply line and thermally couples the oxygen-containing medium flowing through the oxidant supply line and a second medium flowing through an air conditioning process air line of an air conditioning unit, the heat exchanger being located downstream of a cabin air compressor in the air conditioning process air line.

Abstract: A power regulator and a process regulator, or a power regulating device for regulating hybrid energy sources are provided for an aircraft. The power regulator and process regulator is equipped such that the requirement of a required means of a consumer is measurable. In this arrangement the power regulating device is equipped such that a first operating characteristic of a first energy source and a second operating characteristic of a second energy source are determinable. By means of the first energy source a first requirement share can be generated, and by means of the second energy source a second requirement share of the required means can be generated. The power regulating device can regulate the first energy source and the second energy source such that depending on the first operating characteristic and on the second operating characteristic the first requirement share and the second requirement share of the required means can be provided to the consumer.

Abstract: A cooling system on board an aircraft includes a device for removing by suction a boundary layer, and a heat exchanger through which flows the boundary layer air that has been removed by suction. Cooling by way of a ram air channel can be reduced or entirely stopped, depending on the flight phase, such that the air drag of the aircraft and thus the fuel consumption can be reduced.

Abstract: The invention relates to an air conditioning system for a transportation means, having multiple zones to be air-conditioned, which may be variably air-conditioned by means of processed supply air in combination with individual trim air conduits, wherein the air conditioning system further has at least one heat exchanger for heating supply air by means of the exhaust heat of a fuel cell, and for discharging the supply air into a trim air distributor supplying the trim air conduits.

Abstract: An aircraft fuel cell system (10) includes a fuel cell (12a, 12b, 12c, 12d) which has an oxidant inlet (14a, 14b, 14c, 14d) for supplying an oxygen-containing medium to the fuel cell (12a, 12b, 12c, 12d). An oxidant supply line (16) has a first end which is connected to the oxidant inlet (14a, 14b, 14c, 14d) of the fuel cell (12a, 12b, 12c, 12d). A second end of the oxidant supply line (16) is connectable to a used air outlet (18) of a cabin (20) of the aircraft.

Abstract: A power regulator and a process regulator, or a power regulating device for regulating hybrid energy sources are provided for an aircraft. The power regulator and process regulator is equipped such that the requirement of a required means of a consumer is measurable. In this arrangement the power regulating device is equipped such that a first operating characteristic of a first energy source and a second operating characteristic of a second energy source are determinable. By means of the first energy source a first requirement share can be generated, and by means of the second energy source a second requirement share of the required means can be generated. The power regulating device can regulate the first energy source and the second energy source such that depending on the first operating characteristic and on the second operating characteristic the first requirement share and the second requirement share of the required means can be provided to the consumer.

Abstract: A cooling system on board an aircraft includes a device for removing by suction a boundary layer, and a heat exchanger through which flows the boundary layer air that has been removed by suction. Cooling by way of a ram air channel can be reduced or entirely stopped, depending on the flight phase, such that the air drag of the aircraft and thus the fuel consumption can be reduced.

Abstract: A hybrid system contains a fuel cell and a combustion engine, whereby a nitrogen-enriched discharge air of the fuel cell is used for a combustion process in a combustion chamber of the combustion engine.