124 results about "Compressed hydrogen" patented technology

A system such as a refueling station capable of multi-mode dispensing is provided. The refueling station is configured to dispense a fuel such as hydrogen to vehicles in different modes, for example, in a form selected from liquid hydrogen, cryo-compressed hydrogen, and compressed hydrogen gases under different nominal pressures such as 35 MPa and 70 MPa. A method of making the same and a method of using are also provided.

The invention relates to the technical field of water electrolysis hydrogen production, and particularly discloses a proton exchange membrane water electrolysis hydrogen production device, which comprises an electrolytic tank, a hydrogen generator, a proton exchange membrane and a hydrogen generator, the pre-compression heat exchanger is used for carrying out primary cooling on the hydrogen generated by the electrolytic cell, and the pre-compression heat exchanger is sequentially connected with a compressor, a gas-liquid separator and a precision filter; the after-compression heat exchanger is used for cooling the compressed hydrogen again and is connected with a hydrogen storage tank; raw material water used for electrolysis of the electrolytic cell sequentially passes through the after-compression heat exchanger and the before-compression heat exchanger to exchange heat with hydrogen, so that the problems of large compressor operation load, low energy efficiency and serious system heat energy waste of traditional electrolytic cell hydrogen production equipment are solved.

The invention discloses a hydrogen storage tank pressure control system of a hydrogen production, hydrogen storage and power generation closed-loop system, and relates to the technical field of hydrogen production, hydrogen storage and power generation, and the hydrogen storage tank pressure control system comprises a pressure data acquisition module which is used for acquiring internal pressure data of a hydrogen storage tank so as to monitor the internal pressure data change of the hydrogen storage tank in real time; the hydrogen output line is used for outputting hydrogen in the hydrogen storage tank, the hydrogen input line is used for inputting hydrogen into the hydrogen storage tank, the control execution module is used for controlling in and out of the hydrogen in the hydrogen storage tank, and the compression module is used for compressing the hydrogen in the hydrogen input line and increasing the pressure. The hydrogen flow rate monitoring module is used for monitoring the flow rate of hydrogen in the hydrogen output line and monitoring the flow rate of hydrogen in the hydrogen input line. The execution module and the compression module are controlled based on the stepped control model, so that the hydrogen flow rate in the hydrogen output line and the hydrogen flow rate in the hydrogen input line are changed until the pressure in the hydrogen storage tank is balanced.

The present disclosure relates to a hydrogen leakage recovery system (1), the system (1) comprising: at least one turbomachinery unit (11); and a recovery unit (12) fluidically coupled with said at least one turbomachinery unit (11), the recovery unit (12) comprising: a separator (121) configured to receive a mixture of hydrogen and other compounds leaked from the turbomachinery unit (11), and to separate the hydrogen from the other compounds so as to obtain a hydrogen stream, and a compressor (123) fluidically coupled with the separator (121), the compressor (123) being configured to receive the hydrogen stream from the separator (121) and to compress the hydrogen stream so as to obtain a compressed hydrogen stream.

Methods and apparatus for hydrogen aircraft with cryogenic compressed storage are disclosed. An example fuel distribution system includes a vacuum vessel, a cryogenic vessel positioned within the vacuum vessel, the cryogenic vessel being part of a cryogenic compressed hydrogen delivery assembly, and at least one of a heater or a thermosyphon loop to maintain pressure of the cryogenic vessel.

A hydrogen gas supply method and the hydrogen gas supply system is provided, including a low-pressure compressor 1 and a high-pressure compressor 2 that compress hydrogen gas, in which a necessary pressure at a supply destination includes a low-pressure region and a high-pressure region and the hydrogen gas is supplied to the supply destination in accordance with the necessary pressure. The low-pressure compressor 1 is a piston crank type compressor. The high-pressure compressor 2 is a hydraulic compressor or a diaphragm type compressor. When the necessary pressure at the supply destination is in the low-pressure region, the hydrogen gas compressed by the low-pressure compressor 1 is supplied to the supply destination.

The invention provides a high-temperature rotational molding controlled-release cross-linked composition as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The high-temperature rotational molding controllable slow-release cross-linked composition disclosed by the invention is prepared from the following components in parts by weight: 100 parts of high-density polyethylene resin, 0.05 to 0.5 part of free radical slow-release initiator, 0.05 to 2 parts of allyl assistant cross-linking agent, 0.05 to 0.2 part of main antioxidant and 0.1 to 0.5 part of auxiliary antioxidant. Through a two-stage rotational molding process, crosslinking is slowly released and controllably initiated at a high temperature, so that the influence on a high-density polyethylene crystalline region is reduced while the ESCR performance is greatly improved, and relatively low hydrogen permeability is kept. The high-temperature rotational molding controllable slow-release cross-linked composition can be applied to a compressed hydrogen plastic inner container for a vehicle.

A sea-going cargo carrier having a primary driving-mechanism and one or more back-up engines comprises liquefied hydrogen (LH2) tanks 10, hydrogen boil-off gas (BOG) compressors 18, compressed hydrogen containers 22 to store the compressed hydrogen, and pipework 24 to supply the compressed hydrogen to the back-up engines. The compressors compress the BOG from the liquefied hydrogen tanks to provide compressed hydrogen. The primary driving mechanism can be one or more of an internal combustion engine, a hydrocarbon-fuel engine, or one or more sails. The cargo carrier can be a liquefied gas carrier or a goods carrier. When the cargo carrier is a liquefied hydrogen carrier, it can have liquefied hydrogen tanks which are able to provide hydrogen BOG as a back-up engine fuel source. The BOG compressors can compress the BOG from the liquefied hydrogen tanks to a pressure above 200 barg. The compressed hydrogen containers can be isotainers.

The present invention relates to a method for purifying at least one impurity and compressing hydrogen, comprising at least one thermal compression and cooling of the hydrogen to a temperature strictly below 0°C, either simultaneously or starting with one of the two, to a temperature and pressure combination such that said at least one impurity condenses sufficiently so that the remaining quantity of the impurity in the hydrogen is less than a predetermined value. The present invention also relates to a device specially designed to implement the method according to the invention. Abstract figure: Figure 1

The application is suitable for the technical field of seabed hydrogen storage, and provides a large-scale underwater constant-pressure hydrogen storage device, which comprises a hydrogen storage tank, a hydrogen supply network and a hydrogen transportation pipeline, and the hydrogen storage tank and the hydrogen supply network are connected through the hydrogen transportation pipeline; the hydrogen storage tank comprises a rigid gas storage tank and a composite suction caisson arranged at the bottom of the rigid gas storage tank; a central pipeline connected with the hydrogen transportation pipeline is arranged in the rigid gas storage tank; a seawater port for inflow or outflow of seawater is further arranged at the bottom of the rigid gas storage tank; a seawater filter for filtering seawater is further arranged in the seawater port; and a storage tank flexible membrane for preventing compressed hydrogen from contacting seawater is further arranged in the rigid gas storage tank; the application can comprehensively solve the key technical problems faced by large-scale seabed hydrogen storage, promote the development of underwater hydrogen storage technology in the direction of higher efficiency, higher safety and lower cost, and contribute to the sustainable development of the hydrogen energy industry.

The utility model discloses a counterweight forklift powered by a hydrogen fuel cell, which comprises a frame, a cab arranged above the frame, a hydrogen supply device arranged on one side of the cab, a transportation device arranged on the other side of the cab, and a counterweight arranged below the hydrogen supply device, a driving wheel set and a steering wheel set are arranged at the two ends of the frame respectively, steering wheels are arranged below the balance weight, the hydrogen fuel cell is arranged in the middle of the frame, a hydraulic station is arranged between the cab and the hydrogen supply device, and a gas-electricity module and an electric module are further distributed in the cab. The counterbalance forklift truck is efficient and environmentally friendly, zero-emission operation can be achieved in a pure hydrogen mode, switching of three energy supply modes can be supported through the gas-electricity module, energy consumption can be optimized according to different working conditions, efficiency and economical efficiency are both considered, the cabin for containing the compressed hydrogen tank is arranged, the maintenance cost of the compressed hydrogen tank is reduced, and the service life of the compressed hydrogen tank is prolonged. The capacity of the compressed hydrogen tank in the device is larger, so that the endurance time of the forklift is prolonged.

A hydrogen production apparatus for a wind turbine is provided, including an electrolytic hydrogen production unit for producing hydrogen gas from electrical energy generated by the wind turbine, a compressor unit for compressing the produced hydrogen gas, and a sensor unit fluidly connected to the compressor unit for detecting an oil contamination of the compressed hydrogen gas. Thus, an oil contamination of the hydrogen gas produced by the hydrogen production apparatus is continuously monitored. Further, oil contamination of the hydrogen gas is detected before the hydrogen gas is discharged by the hydrogen production apparatus.

The pressure vessel system can include: an inner tank, a jacket, a set of supports, and a set of tubes (a.k.a., fill tubes). The system can optionally include a set of mounts. The system can function to fluidly isolate a first chamber (e.g., interstitial vacuum chamber) between the jacket and the inner tank and a second chamber within the inner tank (e.g., storage chamber for cryo-compressed hydrogen). Additionally, the system can function to structurally support the inner tank while allowing relative motion between the inner tank and the jacket along an interface of a support, which can mechanically constrain the inner tank while allowing expansion of the inner tank within the first chamber (and / or deformation relative to the jacket).

The invention discloses a fuel cell hydrogen supply system in the technical field of hydrogen fuel cells. The fuel cell hydrogen supply system comprises a fuel cell stack, a hydrogen storage bottle, a first buffer tank and a second buffer tank, the hydrogen storage bottle is used for storing compressed hydrogen required by operation of the fuel cell stack, the hydrogen storage bottle is communicated with the fuel cell stack through a pipeline, and a pressure reducing valve, a first electromagnetic valve, a one-way valve, a first proportional electromagnetic valve and a first pressure sensor are sequentially arranged on the pipeline between the hydrogen storage bottle and the fuel cell stack; the first buffer tank is communicated with the fuel cell stack, a gas-water separator and a second electromagnetic valve are arranged on a pipeline between the fuel cell stack and the first buffer tank, the first buffer tank is connected with a third electromagnetic valve through a pipeline, and the third electromagnetic valve is used for discharging gas in the first buffer tank; the second buffer tank is connected in parallel to a pipeline between the hydrogen storage bottle and the fuel cell stack, and the second buffer tank is used for storing gas discharged to the fuel cell stack in the purging process. The scheme solves the problem of galvanic pile damage caused by anode air shortage or overlarge cathode and anode pressure difference.

A stable discharge pressure of compressed hydrogen gas generated from the electrolysis of water is achieved and maintained at the outlet of a "hybrid" multistage compression system comprising at least a first section comprising at least one centrifugal 5 compressor powered at least in part by electricity generated from at least one renewable energy source and a further section downstream of the first section, wherein the further section comprises at least one reciprocating compressor. 10 15 20 25 20 24 21 96 83 13 S ep 2 02 4 A B S T R A C T 2 0 2 4 2 1 9 6 8 3 1 3 S e p 2 0 2 4 5 1 0 1 5 2 0

A process for utilizing hydrogen gas output from at least one trailer may include forming hydrogen gas from liquid hydrogen stored in at least one trailer, and supplying the hydrogen gas from the trailer to a pipeline, a turbine, a liquefaction unit for subsequent liquefaction of the hydrogen gas, a fuel cell, and / or a compression system for compressing the hydrogen gas and subsequently liquefying the compressed hydrogen gas output from the compression system via a liquefaction unit connected to the compression system. An apparatus for utilizing hydrogen gas output from at least one trailer may be configured to perform embodiments of the process.

The present invention relates to an apparatus for producing liquefied hydrogen, the apparatus comprising: a hydrogen generator, such as an electrolyzer, configured to produce hydrogen; a liquefier; a feed line connecting a hydrogen outlet of the hydrogen generator to an inlet of a liquefier, the liquefier including a refrigerator having a circulation loop configured to supply cooling power and cool hydrogen from the feed line to liquefy the hydrogen, the apparatus comprises a buffer reservoir configured to store compressed hydrogen between a hydrogen generator and a liquefier, the liquefier configured to provide a cooling power and / or a liquefaction capability that can be changed between at least two levels, the apparatus comprising a determination mechanism for determining a fill level of the buffer reservoir, the device is configured to vary the cooling power and / or liquefaction capacity of the liquefier in accordance with the fill level of the buffer memory determined by the determination mechanism. The invention also relates to a method for producing liquefied hydrogen using the above apparatus.

This invention relates to a water electrolysis system for producing compressed hydrogen, the system comprising a water electrolysis cell stack, a multiphase pump disposed downstream of the electrolysis cell stack, and a hydrogen gas-liquid separator. The multiphase pump is disposed between the water electrolysis cell stack and the hydrogen gas-liquid separator. The invention also relates to a method for producing compressed hydrogen in a water electrolysis system, the method comprising: supplying deionized water or liquid electrolyte to the water electrolysis cell stack; producing hydrogen in the water electrolysis cell stack; compressing the generated hydrogen and a mixture of entrained deionized water or liquid electrolyte in the multiphase pump; and performing gas-liquid separation of the compressed generated hydrogen and the entrained deionized water or liquid electrolyte mixture in the hydrogen gas-liquid separator.

System and method for generating dried compressed hydrogen gas, comprising: - A compressor (E01), configured for: • receiving the hydrogen gas with water vapor under atmospheric or near atmospheric pressure, in particular from a storage space; • compressing the hydrogen gas; and • delivering compressed hydrogen gas with water vapor to a separator; and - Said separator (E02), configured for: • receiving the compressed hydrogen gas with the water vapor and the condensed liquid water from the compressor (E01); • separating the compressed hydrogen gas with the water vapor from the condensed liquid water; • delivering the compressed hydrogen gas to at least one adsorber (E08); and • delivering the condensed water to a drain (SUMP), - Said at least one adsorber (E08), configured for: • receiving hydrogen with the water vapor under pressure from the separator; • drying the hydrogen gas by adsorbing the water vapor; and • releasing the hydrogen under pressure.

The invention belongs to the technical field of hydrogen separation, and relates to a hollow fiber type electrically-driven proton exchange membrane hydrogen pump for hydrogen separation / compression, which is characterized in that the hollow fiber type electrically-driven proton exchange membrane hydrogen pump is formed by packaging one or more hollow fiber type proton exchange membrane electrodes, and hydrogen is separated / compressed from hydrogen-containing mixed gas at high purity under external voltage. Due to the hollow fiber type membrane electrode structure, the bundling packaging mode and the excellent pressure resistance, the specific surface area and the integration level of the proton exchange membrane hydrogen pump can be remarkably improved, and the application requirements of light-weight and large-scale hydrogen separation / compression are met.

The light-weight hydrogen centrifugal compressor comprises a compression box, and a gas inlet pipe and a gas outlet pipe are fixedly mounted on the outer surface of the compression box; the cooling mechanism is used for cooling the compressed hydrogen; the cooling mechanism comprises a compression sleeve, the compression sleeve is fixedly installed in an inner cavity of the compression box, an impeller is rotatably installed in an inner cavity of the compression sleeve, a turnover pipe is fixedly installed on the outer surface of the compression box and communicates with the inner cavity of the compression box, and a first connecting pipe is fixedly installed on one side of the compression sleeve; the first connecting pipe is fixedly connected with the air outlet pipe, and an inner cavity of the turnover pipe is fixedly installed on the cooling pipe. Cooling water in the cooling box circularly flows to cool compressed hydrogen in the air outlet pipe and the inner cavity of the air outlet pipe, and when hydrogen entering the inner cavity of the compression box needs to be cooled through the cooling pipe, the second connector and the third connector are connected with the two ends of the cooling pipe correspondingly, so that the cooling water passes through the inner cavity of the circulation pipe.

A compression apparatus includes at least one compression unit, a voltage applier, an anode end plate provided on an anode separator located at a first end in a direction of stacking, a cathode end plate provided on a cathode separator located at a second end in the direction of stacking, and first and second plates provided between the cathode end plate and the cathode separator located at the second end. The compression apparatus causes, by using the voltage applier to apply a voltage, protons taken out from an anode fluid that is supplied to the anode to move to the cathode via the electrolyte membrane and produces compressed hydrogen. The first plate has formed therein a first space in which to store a cathode gas containing the compressed hydrogen. The second plate is provided with a first manifold through which the cathode gas flows and a first communicating path through which to lead, to the first space, the cathode gas having flowed in from the first manifold.

Large scale exploitation of Solar energy is proposed by using floating devices which use solar energy to produce compressed hydrogen by electrolysis of deep sea water. Natural ocean currents are used to allow the devices to gather solar energy in the form of compressed hydrogen from over a large area with minimum energy transportation cost. The proposal uses a combination of well understood technologies, and a preliminary cost analysis shows that the hydrogen produced in this manner would satisfy the ultimate cost targets for hydrogen production and pave the way for carbon free energy economy.

The present invention discloses a process for efficiently recovering hydrogen from waste gas, which belongs to the field of hydrogen recovery technology and includes the following steps: 1. Raw gas pretreatment: including dust removal and dehydration treatment; 2. Primary compression and pressure swing adsorption pretreatment: The primary compressed nitrogen / hydrogen mixed gas enters PSA adsorption cylinder A or PSA adsorption cylinder B, and the PSA adsorption cylinder is filled with adsorbent for preliminary purification, and the hydrogen concentration is increased to more than 99.99%; 3. Secondary compression and cryogenic distillation: The secondary compressed hydrogen first enters the main heat exchanger and then enters the distillation tower, where the nitrogen is preferentially liquefied, and hydrogen with a purity of ≥99.999% is output from the top of the tower. The present invention optimizes the PSA adsorbent so that the hydrogen concentration can be increased to more than 99.99% after preliminary purification, and the hydrogen recovery rate can reach more than 90%, with high adsorption efficiency and high hydrogen recovery rate. Further combined with cryogenic distillation, the purified hydrogen meets the ultra-high purity requirements.

A compressor includes at least one cell that includes an electrolyte membrane, an anode located on one main surface of the electrolyte membrane, and a cathode located on the other main surface of the electrolyte membrane; a metallic anode separator located on the anode; a cathode separator located on the cathode; and a voltage application unit for applying a voltage between the anode and the cathode, wherein the compressor causes, by using the voltage applier to apply a voltage, a proton extracted from an anode fluid supplied to the anode to move to the cathode and generates compressed hydrogen, and the compressor includes a controller for causing the voltage application unit to apply the voltage such that a voltage applied per unit cell is lower than a corrosion potential of the metallic anode separator.

The utility model relates to container technical field, concretely is a kind of compressed hydrogen cylinder formula container, solve the problem mentioned in the above background art, including box and box is equipped with door, the inside bottom of box is equipped with multiple track rods along its length direction, storage rack is slidably connected on track rod, and hydrogen cylinder is placed on storage rack, and is pushed along track rod, and the container that is equipped with hydrogen is placed in box, and the inside bottom of box is equipped with multiple track rods along length direction, and it is equipped with the storage rack that can slide on track rod, change the cumbersome loading mode of previous relying on forklift and manual forklift multiple transfer, manual auxiliary positioning. When loading the container that is equipped with hydrogen cylinder, just use forklift to insert container along the tail of box into box, then insert container support leg into corresponding storage rack slot, can push container along track rod, make it slide on track rod, easily move it to the inside appropriate position of box and place.

The invention discloses a compression hydrogen storage system and a control method thereof.The compression hydrogen storage system comprises a gas source, a compressor, a plurality of hydrogen storage facilities arranged in a graded mode, a pressure detection module, a control valve and a control system, and the control system sets sequentially-decreased target shutdown pressure for all the hydrogen storage facilities and sets the maximum compression ratio threshold value; by monitoring the air inlet / outlet pressure of the compressor and the pressure of each hydrogen storage facility in real time, dynamically judging the current working condition, intelligently controlling the opening and closing of each control valve and selecting a proper hydrogen storage facility to inflate, the actual compression ratio in the compression process is ensured not to exceed the maximum compression ratio threshold all the time. The problem that the compression ratio is too high due to air inlet pressure fluctuation can be effectively restrained, the heating value and abrasion of the compressor are remarkably reduced, the service life of equipment is prolonged, and the safety and economical efficiency of operation of the hydrogen refueling station are improved.

Gas compression system having a compressor for compressing hydrogen, a recovery device(s) for recovering hydrogen escaping as leakage gas during compression, and a leakage gas return line to return recovered leakage gas into a stage in the gas compression system upstream of the compressor and / or into a suction line of a compressor stage of the compressor. The compressor has a leakage gas discharge line for discharging leakage gas. Each recovery device is fluidically connectable to the discharge and return lines and has a metal hydride reservoir(s) heat-coupled to a respective heat exchanger. Each hydride reservoir has a hydride-forming metal alloy(s) which, when heat is supplied or dissipated through the respective heat exchanger, provides cyclic de- or absorption of leakage gas. Each recovery device increases leakage gas pressure in the discharge line to at least the pressure in the upstream stage and / or the suction pressure in the suction line.

The utility model provides a compressor hydrogen environment testing device, which particularly relates to the technical field of compressor testing and comprises a hydrogen supply module, a compressor testing module, a safety control module and a recycling module. The hydrogen supply module is responsible for conveying hydrogen to the compressor test module; the compressor test module is connected with the hydrogen supply module and used for compressing hydrogen to test compressor performance; the safety control module is connected with the compressor test module, regulates and controls the air pressure in the hydrogen conveying process and extinguishes sparks in the hydrogen conveying process; the recycling module is connected with the compressor testing module and the safety control module, and recycling of hydrogen is achieved. The device solves the safety problem that the performance of the compressor cannot be tested in the hydrogen environment, the test safety is enhanced, the test period is shortened, and the cost is reduced.

A multi-role pump and a system such as a refueling station comprising such a pump are provided. The multi-role pump is configured to transfer a liquefied fuel such as hydrogen from a delivery truck, fuel the liquefied fuel in liquid form to a first vehicle, and boost the liquefied fuel for a second vehicle with various higher pressure onboard storage systems, while minimizing liquid fuel boil-off loss. The system is configured to dispense a fuel such as hydrogen to vehicles in different modes, for example, in a form selected from liquid hydrogen, cryo-compressed hydrogen, and compressed hydrogen gases under different pressures such as 35 MPa and 70 MPa. A method of making the same and a method of using are also provided.