620results 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.

An energy network is provided. An embodiment includes a network having a plurality of power stations and a plurality of loads interconnected by an electricity grid. The loads include electrolysers. The network also includes a controller that is connected to both the stations and the loads. The controller is operable to vary the available power from the power stations and / or adjust the demand from the electrolysers to provide a desired match of availability with demand and produce hydrogen as a transportation fuel with specific verifiable emission characteristics

Provided is a hydrogen station that supplies hydrogen to an external hydrogen tank, the hydrogen station including: a reciprocating compressor that is driven by a driver of which revolution is controllable; a cooling device that is capable of cooling hydrogen supplied from the reciprocating compressor to the hydrogen tank; a temperature sensor that detects an internal temperature of the hydrogen tank or a temperature of the hydrogen supplied to the hydrogen tank; and a control unit that controls the revolution of the driver based on the temperature detected by the temperature sensor.

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.

An hydrogen tank filling apparatus includes a first hydrogen supply pipe for supplying hydrogen substantially at an atmospheric temperature from a high-pressure hydrogen storage tank to a hydrogen tank, a second hydrogen supply pipe for supplying cooled hydrogen from the high-pressure hydrogen storage tank to the hydrogen tank, and an internal tank temperature measuring unit for measuring the temperature inside the hydrogen tank. The first hydrogen supply pipe and the second hydrogen supply pipe are selectively switched by a control unit, depending on changes in the temperature inside the hydrogen tank.

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 fuel filling apparatus is provided. The fuel filling apparatus comprises an overfilling protective valve arranged in a fuel gas supply path for supplying a fuel gas to an automobile. The overfilling protective valve further comprises a fuel gas path, a valve unit for opening and closing the fuel gas path by a valve body, a valve body displacement means for displacing the valve body according to a filling pressure of the fuel gas, and a temperature modulating unit for modulating a temperature of the valve body displacement means. Even though a difference between the temperature of the fuel gas and the operation temperature of the overfilling protective valve is large, the temperature of the valve body displacement means can be maintained within the preset temperature range by the temperature modulating unit and the overfilling protective valve can be exactly operated under the preset pressure.

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.

A man portable hydrogen source, the source comprising one or more hydrogen generating elements, an ignition control system and a pressure vessel. Each hydrogen generating element comprises a pellet holder provided with one or more recesses and a thermal insulation layer to reduce heat transfer to adjacent hydrogen generating elements; wherein at least one recess contains a pellet of a chemical mixture which on thermal decomposition evolves hydrogen gas; wherein the ignition control system comprises one or more igniters, associated with an individual pellet, and activation means to activate the igniters; and wherein the evolved hydrogen and hydrogen generating elements are contained within the pressure vessel.

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 present invention provides a hydrogen storage tank (11) and a replacement method for an on-off valve, in which hydrogen occluding alloy (MH) received in a tank body (12) is prevented from being oxidized in the replacement of an on-off valve (30) connected to a hydrogen supply / discharge pipe (28) extending from the tank body (12). The hydrogen storage tank (11) has the tank body (12) in which the hydrogen occluding alloy (MH) is being received, the hydrogen supply / discharge pipe (28) to which the on-off valve (30) is connected, the on-off valve (30) being used to supply hydrogen gas to the tank body (12) and discharge hydrogen gas from the tank body (12), and a gas supply pipe (24) used to supply inert gas to the tank body (12) and provided independently of the hydrogen supply / discharge pipe (28). The method of replacing the on-off valve (30) connected to the hydrogen supply / discharge pipe (28) is such that inert gas is supplied from the gas supply pipe (24) to the tank body (12) and the on-off valve (30) is replaced in a state where the inert gas can be discharged from the supply / discharge pipe (28).

A hydrogen production and distribution system which may exploit pre-existing energy infrastructure such as offshore hydrocarbon production facilities, sewage treatment plants, and natural gas pipelines. The offshore facilities and sewage treatment plants may have wind turbines, photovoltaic elements, and wave powered generators to generate electricity, which is then stored in batteries. Electrical power is drawn from the batteries to electrolyze water. Hydrogen collected from electrolysis is conducted to consumers through a system using the natural gas pipelines and optionally, tank trucks formerly used to deliver propane gas. A master computerized control system controls the hydrogen production and distribution system, and is isolated from public communications channels.

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.

Recovery of dehydrogenation product must be done separately from supply of hydrogen fuel. However, there is a problem that it takes much time when dehydrogenation product recovery and fuel filling are done separately. A fuel filling / waste solution recovery apparatus includes measuring means to measure a volume of supplied fuel and a volume of recovered waste solution by measuring flow rates of solutions passing through a fuel filling nozzle and a recovery nozzle or piping, and a display which shows the volume of supplied fuel and the volume of recovered waste solution which are measured by the measuring means.

A gas filling apparatus in the gas filling system includes a precooler for cooling hydrogen gas supplied from the gas supply source (11) and discharges the hydrogen gas cooled by the precooler to fill the hydrogen gas into the gas tank. The temperature of the hydrogen gas cooled by the precooler is detected by a gas temperature sensor that detects, upstream of the gas tank, a temperature of the hydrogen gas cooled by the precooler. A flow rate controller controls a filling flow rate of the hydrogen gas to be filled into the gas tank, based on the detected temperature of the hydrogen gas. For example, when the detected temperature of the hydrogen gas is high, the filling flow rate is reduced as compared to that when the detected temperature of the hydrogen gas is lower.

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.

The invention provides an adsorption-hydration reaction dual hydrogen-storing method and a device for realizing the hydrogen-storing method. The method provided by the invention comprises the following steps: 1) performing hydrophilic treatment on a carbon nanotube after the carbon nanotube is purified; 2) preparing a solution for generating hydrate, and uniformly spraying the prepared solution into the carbon nanotube treated in the step (1); 3) placing a mixed system of the soaked carbon nanotube and water solution into a hydrogen-storing tank, compacting the mixed system, covering a hydrogen-storing tank cover, sealing and standing by till uniformly mixing; and 4) vacuumizing the hydrogen-storing tank, and then connecting the hydrogen-storing tank with a hydrogen source, and performing a hydrogen-storing process. The device provided by the invention is mainly composed of the hydrogen-storing tank, the hydrogen source, a gas booster pump, a pressure instrument, a temperature observing system, a pipeline, and the like. The present problems of utilizing, storing and transporting hydrogen are solved according to the method and the device provided by the invention, the hydrogen storage rate is increased and the operation is convenient.

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.