619results about "Hydrogen technologies" patented technology

A portable hydrogen refueling stations which can dispense gaseous hydrogen from one or more internal high pressure tanks. The refueling station can be refilled with a lower pressure hydrogen gas feed and then compressed for storage within the refueling station.

Systems for handling and/or dispensing hydrogen or a mixture of fuels containing hydrogen gas including refueling stations for hydrogen-powered vehicles. Pure hydrogen or various mixtures ratios of hydrogen and CNG may be dispensed. Hydrogen handling equipment may include a hydrogen generator, a pressurizing apparatus or compressor, pressure vessels, piping, valves, vent pipes, and/or a dispenser. Substantially vertical orientation of pressure vessels may reduce the amount of land required and facilitate installation in urban environments. Pressurization may take place before hydrogen generation to reduce the power required for pressurization. Safety features include enclosures and surrounding walls that lean away from the equipment. Any leaking hydrogen, fires, or explosions may be contained and/or directed upward, protecting human life and property. Systems may be shop assembled and certified.

A hydrogen fuel system comprises an open gas circuit that includes a source of hydrogen. The hydrogen fuel system also includes a compressor that forces a flow of hydrogen from the source of hydrogen through the open gas circuit, and a hydrogen storage vessel comprising an inlet and an outlet. The hydrogen fuel system may also include a hydrogen storage bed being disposed within the hydrogen storage vessel between the inlet and the outlet, the hydrogen storage vessel being adapted to form a portion of the open gas circuit so that the hydrogen storage bed is cooled by convection while hydrogen flows through the open gas circuit.

A hydrogen dispensing station and method of operating a hydrogen dispensing station for dispensing to multiple receiving vessels. The station and method limit receiving vessel gas temperature during dispensing. Various components used to limit receiving vessel gas temperature during dispensing are mutual to multiple hydrogen service ports. Receiving vessel gas temperature during dispensing may be affected by pressure ramp rate control, cooling of hydrogen in a heat exchanger, and/or use of a lower temperature hydrogen source stream.

An apparatus and process for measuring the concentration of hydrogen gas being transferred through a nozzle from a source container to a destination container and for providing an alert and/or taking action where hydrogen gas leaks may create an unsafe condition. The invention can accurately and reproducibly respond to and measure the absolute hydrogen gas concentration within the nozzle housing using hydrogen gas sensors that are selective only to hydrogen, which do not require the presence of oxygen to operate and which do not saturate when hydrogen safety levels are reached. These sensors are positioned inside the nozzle housing to allow for the direct and immediate knowledge of the presence of hydrogen gas that cannot be safely determined by other means. An apparatus and process for detecting leaks of liquid hydrogen through a nozzle during transfer of liquid hydrogen from a source container to a destination container are also discussed.

A hydrogen dispenser comprises a programmable controller and a user interface operably connected to the programmable controller. The programmable controller has a plurality of user-selectable hydrogen dispensing rate algorithms. The user interface offers the plurality of user-selectable hydrogen dispensing rate algorithms and is used for setting a user-selected dispensing rate algorithm from among the plurality of user-selectable hydrogen dispensing rate algorithms.

A hydrogen storage tank for containing solid-state hydrogen storage media, and method for determining the hydrogen fill level in the tank. The tank has at least one compartment for storing the storage media, passages for transporting hydrogen gas to and from the compartment, and a heat distribution system for establishing a substantially uniform temperature in the storage media. A look-up table is generated for the tank that relates hydrogen pressure changes in the tank versus hydrogen fill levels in the tank as a function of temperature. The tank is filled to full capacity by adsorbing hydrogen on the storage media. Thereafter, hydrogen is released from the storage media for a time period during which there is a substantially constant demand on the tank, the change in pressure of the released hydrogen gas is measured, and the look-up table is applied to determine the hydrogen fill level in the tank.

An apparatus and a method for testing a hydrogen dispenser is disclosed. The apparatus includes a first tank, a supply channel fluidly coupled to the first tank, the supply channel configured to be fluidly coupled to the hydrogen dispenser, a backpressure system fluidly coupled to the first tank, and a controller operatively coupled to the backpressure system. The controller is configured to receive a target fill profile, and control the backpressure system to effect a fill profile according to the target fill profile.

The invention discloses a mixed filling system applied to a hydrogen filling station of liquid hydrogen. The mixed filling system comprises a liquid hydrogen filling unit and a high-pressure hydrogengas filling unit which are connected with a liquid hydrogen storage pot for the station, wherein a first liquid hydrogen conveying pipe in the liquid hydrogen filling unit can be communicated with theliquid hydrogen storage pot for the station through a liquid hydrogen pump; an output end of the first liquid hydrogen conveying pipe is used for connecting a liquid hydrogen filling gun; the high-pressure hydrogen gas filling unit comprises a second liquid hydrogen conveying pipe and a third liquid hydrogen conveying pipe which can be communicated with the liquid hydrogen storage pot for the station through the liquid hydrogen pump; the second liquid hydrogen conveying pipe is communicated with a spraying nozzle in a gas-liquid mixer; the third liquid hydrogen conveying pipe is communicatedwith a vaporizer; a gas output pipe on the vaporizer is communicated with a high-pressure hydrogen gas hydrogen storage bottle; a storage bottle output pipeline of an output end of the high-pressure hydrogen gas hydrogen storage bottle is communicated to the gas-liquid mixer; a hydrogen gas output pipe of the output end of the gas-liquid mixer is used for being connected with a high-pressure hydrogen gas filling gun. The mixed filling system has the advantages that a hydrogen filling form is effectively increased and the liquid hydrogen capability is greatly improved.

The invention relates to the field of development of hydrogen energy source storage equipment, and aims to provide a fixed type multi-layered vacuum heat-insulating high-pressure liquid hydrogen storage tank. The liquid hydrogen storage tank comprises an inner tank and an outer tank; a fiber enhanced epoxy resin based composite material layer covers the outer shell of the inner tank and is fixed in a chamber body of the outer tank by a supporting part; the inner tank and the outer tank are of vacuum heat-insulating interlayers; multiple vacuum radiation-prevention heat insulating layers covering the whole inner tank are paved in the vacuum heat-insulating interlayers; a vacuumizing device and a vacuum meter which communicate with the vacuum heat-insulating interlayers are arranged on the outer tank. By comprehensively considering two factors of the temperature and the pressure in a hydrogen phase chart, the used fiber-wound aluminum inner container can bear the pressure, and the hydrogen storage density is improved more, the waste is avoided and an overpressure condition is also prevented, and the safety of the structure is ensured. The fixed type multi-layered vacuum heat-insulating high-pressure liquid hydrogen storage tank is suitable for liquid hydrogen filling stations and gas-state hydrogen filling stations.

Method for filling a tank with pressurized hydrogen via a filling station comprising at least one buffer container and a fluid circuit connected to said at least one buffer container, the circuit of the filling station comprising a first end connected to at least one source of hydrogen gas, the circuit comprising a second end fitted with a transfer pipe intended to be connected removably to the tank that is to be filled, the method involving a step of cooling the hydrogen supplied to the tank by transferring negative calories between a cold source and the hydrogen, the method being characterized in that it comprises a step of purifying the hydrogen supplied by the source in a purification member before transferring it to the at least one buffer container, and in that it comprises a step of transferring negative calories from said cold source to the hydrogen before and/or during the purification step.