Provided is a flight vehicle that makes it possible to prevent electricity generation by a fuel cell from being stopped in flight even when a mistaken operation is conducted. The flight vehicle including a fuel cell and a propeller, the propeller to be driven by electric power generated by the fuel cell, the flight vehicle including: a stop device giving an instruction to stop the generation of electricity by the fuel cell; a control unit processing stopping of the generation of electricity by the fuel cell; a leg part grounding when the flight vehicle lands, to support a load of the flight vehicle; and a sensor detecting the load applied to the leg part, wherein the control unit permits the stopping of the generation of electricity based on signals from the stop device and the sensor only if a predetermined amount of the load is applied to the leg part.

Provided is a flight vehicle that makes it possible to prevent electricity generation by a fuel cell from being stopped in flight even when a mistaken operation is conducted. The flight vehicle including a fuel cell and a propeller, the propeller to be driven by electric power generated by the fuel cell, the flight vehicle including: a stop device giving an instruction to stop the generation of electricity by the fuel cell; a control unit processing stopping of the generation of electricity by the fuel cell; a leg part grounding when the flight vehicle lands, to support a load of the flight vehicle; and a sensor detecting the load applied to the leg part, wherein the control unit permits the stopping of the generation of electricity based on signals from the stop device and the sensor only if a predetermined amount of the load is applied to the leg part.

A network of an electric vehicle has an energy supply interface, an inverter, an energization interface and a soft starter. The inverter has a first inverter connection configured to connect the inverter to the energy supply interface and a second inverter connection configured to connect the inverter to the energization interface and the soft starter. The inverter is configured to convert a DC voltage applied to the first inverter connection to an AC voltage and to supply same at the second inverter connection. The soft starter is configured to reduce an input voltage applied to the first soft starter connection and to supply the operating voltage, which is reduced compared to the input voltage, at the second soft starter connection.

Fixed point applications of producing hydrogen from hydrocarbons and using such are described. A feedstock including natural gas is introduced to a plasma reformer, and H2 is generated from the feedstock. The plasma reformer can be integrated into a number of locations for various purposes. For example, reformers can be integrated into buildings for onsite generation of H2 , either for storage, distribution as fuel, or for generating electricity for onsite needs to alleviate strain on the energy grid. Likewise, legacy natural gas distribution points or fuel stations can be converted to H2 distribution points, or further used as electricity distribution points by way of an H2 fuel cell. Likewise, reformers can be integrated into natural gas distribution networks to self-energize nodes or stations in the network via H2 fuel cells.

Fixed point applications of producing hydrogen from hydrocarbons and using such are described. A feedstock including natural gas is introduced to a plasma reformer, and H2 is generated from the feedstock. The plasma reformer can be integrated into a number of locations for various purposes. For example, reformers can be integrated into buildings for onsite generation of H2 , either for storage, distribution as fuel, or for generating electricity for onsite needs to alleviate strain on the energy grid. Likewise, legacy natural gas distribution points or fuel stations can be converted to H2 distribution points, or further used as electricity distribution points by way of an H2 fuel cell. Likewise, reformers can be integrated into natural gas distribution networks to self-energize nodes or stations in the network via H2 fuel cells.

A bi-directional DC voltage converter includes a controller, controlled switches, inductors, and capacitors to accomplish DC voltage conversion with minimal input current ripple and high efficiency. The controller is operable in a boost mode in which the switches are independently controlled to convert low-voltage DC power to high-voltage DC power. The controller is operable in a buck mode in which the switches are independently controlled to convert high-voltage DC power to low-voltage DC power.

A fuel cell vehicle is disclosed. The fuel cell vehicle includes a front fuel cell mounted in a first space and a rear fuel cell mounted in a second space located at the rear side of the first space on the basis of the direction in which the fuel cell vehicle travels. The rear fuel cell includes a top surface lower than the top surface of the front fuel cell on the basis of the ground.

A fuel cell vehicle is disclosed. The fuel cell vehicle includes a front fuel cell mounted in a first space and a rear fuel cell mounted in a second space located at the rear side of the first space on the basis of the direction in which the fuel cell vehicle travels. The rear fuel cell includes a top surface lower than the top surface of the front fuel cell on the basis of the ground.

Aircraft systems including a pressurized fuel tank containing a pressurized fuel, a turbo expander configured to receive the pressurized fuel from the fuel tank, the turbo expander configured to decrease a pressure of the pressurized fuel to generate low pressure fuel having pressure less than the pressurized fuel, a fuel-to-air heat exchanger configured to receive the low pressure fuel from the turbo expander as a first working fluid and air as a second working fluid, the heat exchanger configured to cool the air and warm the fuel, an aircraft cabin configured to receive the cooled air, and a fuel consumption system configured to consume the fuel to generate power.

The present invention relates to a power supply system for underwater vehicles, in particular to a power supply system for autonomous underwater vehicles, to underwater vehicles equipped with such power supply systems and to a method of operating an underwater vehicle. The power supply system for underwater vehicles comprises a hydrogen fuel cell, which on the one hand is in fluid contact with a metal hydride storage tank, and on the other hand, with a membrane module that is capable of extracting dissolved oxygen from water. By combining the above mentioned components, the energy necessary to support the AUV operation and the operation of its sensors can be provided, replacing in an efficient and sustainable way the currently employed battery energy systems. For the operation of gliders, a weight compensating mechanism could also be implemented.