A valve assembly for pressurized containers includes a main structure, a rotary control element rotatably connected to the main structure and configured so as to allow a gas flow through the valve assembly in accordance with an angular position thereof about a main rotation axis, a detection device which includes an angular position sensor and a movable member. The angular position sensor is configured to detect the angular position of the movable member about an auxiliary rotation axis. The movable member is rotatably supported on the main structure and the angular position sensor is fixed to the main structure. The valve assembly further includes a movement conversion mechanism configured so as to convert the movement of the rotary control element about the main axis into a corresponding rotational movement of the movable member about the auxiliary axis which is different with respect to the main rotation axis.

The invention relates to a method for preparing to refuel a tank in a vehicle with hydrogen, for which purpose the tank pressure is lowered in preparation for driving to a filling station, wherein the filling station is informed of the pending refueling. The method according to the invention is characterized in that the refueling takes place with liquid hydrogen, wherein the maximum achievable pressure level of the tank during refueling, the expected pressure level of the tank when the filling station is reached, and the expected refueling quantity are transmitted to the filling station.

To provide a gas filling method in which it is possible to estimate a volume of a tank with high accuracy even when the tank has a small volume. A hydrogen filling system includes a hydrogen station having a pressure accumulator of compressed hydrogen gas, a vehicle having a hydrogen tank, a connection tube system that connects the accumulator and the tank, and a flow rate sensor and a station pressure sensor provided on the connection tube system. A hydrogen gas filling method is a method of filling the tank with the hydrogen gas from the pressure accumulator and includes estimating a volume of the hydrogen tank based on detection values of the flow rate sensor and the station pressure sensor and a volume value of the connection tube system, after a start of filling of the hydrogen tank with the hydrogen gas from the pressure accumulator.

The present invention relates, inter alia, to a method for storing a medium, in particular a gas, in a pressure storage device (31), wherein, in a preferred embodiment, a dynamic operating pressure, which is dependent on measured temperature values and up to which the medium can be stored in the pressure storage device (31), is determined. In particular, the invention allows dynamic storing of medium in the pressure storage device (31) in respect of the storage pressure, in particular the operating pressure, with a simple design. This is achieved by the dynamic operating pressure being determined, in particular calculated, on the basis of dynamic reference temperature values as a function of time. The method is preferably carried out in an energy system (10), having at least one energy source device (21) for generating a medium and a pressure storage device (31), spatially separated therefrom, for storing the generated medium.

A hydrogen fueling control device and method comprising step S100, obtaining initial parameters of a vehicle-mounted hydrogen reservoir, wherein the initial parameters comprise volume, initial hydrogen pressure, and initial ambient temperature of the vehicle-mounted hydrogen reservoir; step S200, computing a fueling rate and a target pressure for hydrogen fueling according to the initial parameters, wherein the computed fueling rate and target pressure cause the temperature of hydrogen during a hydrogen fueling process to be within a preset safe range; and step S300, controlling a hydrogen fueling station to fuel hydrogen to the vehicle-mounted hydrogen reservoir at the computed fueling rate to the computed target pressure. The control method controls a fueling process by obtaining a fueling rate and a target pressure by means of initial parameters of a vehicle-mounted hydrogen reservoir measured by a hydrogen fueling station, without requiring the real-time communication between the hydrogen fueling station and a vehicle.

Disclosed is a liquefied natural gas storage apparatus. The apparatus includes a heat insulated tank and liquefied natural gas contained in the tank. The tank has heat insulation sufficient to maintain liquefied natural gas therein such that most of the liquefied natural gas stays in liquid. The contained liquefied natural gas has a vapor pressure from about 0.3 bar to about 2 bar. The apparatus further includes a safety valve configured to release a part of liquefied natural gas contained in the tank when a vapor pressure of liquefied natural gas within the tank becomes higher than a cut-off pressure. The cut-off pressure is from about 0.3 bar to about 2 bar.

A pressure testing method capable of determining with a higher accuracy whether a high-pressure tank is deteriorated. The pressure testing method tests the high-pressure tank that includes a liner and a fiber-reinforced resin layer covering the outer surface of the liner and that has been used while repeating charge and discharge of gas to and from the inside thereof after undergoing a pressure resistance test conducted at a pressure resistance test pressure. The method increases the internal pressure of the high-pressure tank filled with gas to a test pressure that is lower than the pressure resistance test pressure, so that a plurality of AE waveforms is extracted from output waveforms of an AE sensor that detects AE waves generated in the high-pressure tank, and determines whether the high-pressure tank is deteriorated, on the basis of the extracted AE waveforms.

A hydrogen supply system includes: a facility identification unit that identifies a fuel supply facility in the vicinity of a travel route of a vehicle to a destination; a calculation unit that calculates an estimated remaining amount of hydrogen fuel at an arrival time when the vehicle reaches the fuel supply facility on the basis of remaining amount information indicating a remaining amount of the hydrogen fuel transmitted from the vehicle; a determination unit that determines whether or not refueling of the vehicle is required on the basis of the estimated remaining amount; and a registration unit that registers an estimated replenishment amount based on the estimated remaining amount and the arrival time as a usage reservation at the fuel supply facility in a case in which the determination unit determines that the refueling is required.

A hydrogen station includes a water electrolysis device that produces hydrogen gas by an electrolytic reaction consuming power supplied from a commercial power network, a compressor that compresses the hydrogen gas produced by the water electrolysis device, an accumulator that accumulates the hydrogen gas compressed by the compressor, a dispenser that fills a fuel cell vehicle with the hydrogen gas accumulated in the accumulator, and a control device that controls a power consumption amount of the water electrolysis device on the basis of a command for adjusting supply and demand of power of the commercial power network.

According to one aspect of the present invention, a hydrogen fuel filling system includes a first flow passage through which hydrogen fuel supplied from a pressure accumulator that accumulates hydrogen fuel under pressure passes; a second flow passage through which hydrogen fuel supplied from the pressure accumulator passes, and which is arranged in parallel with the first flow passage; a switching valve that switches flow passages selectively from one of the first and second flow passages to another, or that switches flow passages between one and both of the first and second flow passages; and a control circuit that controls opening/closing of the switching valve, wherein a fuel cell vehicle using hydrogen fuel as a power source is filled with hydrogen fuel while switching the flow passages by the switching valve during supply from the pressure accumulator.