30results about "Hydrogen technologies" patented technology

A hydrogen gas supply apparatus according to one aspect of the present invention includes a compressor configured to compress hydrogen gas and supply the hydrogen gas compressed to a pressure accumulator which accumulates the hydrogen gas, an adsorption column disposed between the discharge port of the compressor and the pressure accumulator, and configured to include an adsorbent for adsorbing impurities in the hydrogen gas discharged from the compressor, and a plurality of valves disposed at the gas inlet / outlet port side of the adsorption column, being at a discharge port side of the compressor, and configured to be able to seal the adsorption column, wherein the space in the adsorption column is sealed using the plurality of valves such that the inside of the adsorption column is maintained to have a high pressure by the hydrogen gas compressed in the case where the compressor is stopped.

A multi-layer structure for transporting, distributing and storing hydrogen, comprising, from the inside to the outside, at least one sealing layer (1) and at least one composite reinforcing layer (2), the innermost composite reinforcing layer being wrapped around the outermost one adjacent to the sealing layer (1), the sealing layer comprising primarily at least one semi-crystalline long-chain polyamide thermoplastic polymer P1i (i=1 to n, n being the number of sealing layers), the Tf of which is in accordance with ISO 14049. 11357-3:2013, above 160°C, and comprising, excluding one polyether block amide (PEBA), up to 50% by weight of an impact modifier, based on the total weight of the composition, and up to 1.5% by weight of a plasticizer, based on the total weight of the composition, wherein the composition does not comprise a nucleating agent, and the at least one polyamide thermoplastic polymer of each sealing layer may be the same or different, and at least one of the composite reinforcing layers consists mainly of a fibrous material in the form of continuous fibers impregnated with a composition comprising at least one polymer P2j (j = 1 to m, where m is the number of reinforcing layers), in particular an epoxy resin or an epoxy-based resin, and the structure does not include an outermost layer adjacent to the outermost polyamide polymer composite reinforcing layer.

The application discloses a hydrogen production and hydrogenation integrated station control method, which comprises hydrogen production equipment, a hydrogen buffer tank, a first-stage compressor, a first-stage hydrogen storage tank, a second-stage compressor, a second-stage hydrogen storage tank and hydrogenation equipment which are sequentially connected; during hydrogenation, the hydrogen production equipment, the first-stage compressor, the second-stage compressor and the hydrogenation equipment are controlled to work according to the relationship between the pressures of the hydrogen buffer tank, the first-stage hydrogen storage tank, the second-stage hydrogen storage tank and the hydrogenation equipment when the hydrogenation equipment works and the maximum filling pressure allowed for the hydrogenation equipment, the first preset pressure, the second preset pressure, the maximum allowable working pressure of the second-stage hydrogen storage tank, the fourth preset pressure, the minimum inlet air pressure of the first-stage compressor, the maximum allowable working pressure of the first-stage hydrogen storage tank, the third preset pressure, the maximum allowable working pressure of the hydrogen buffer tank and the minimum inlet air pressure of the second-stage compressor. The application realizes on-demand start and stop of hydrogen production, reduces loss, prolongs the service life of equipment, reduces cost and production hidden danger.

The present invention relates to a multilayer structure for transporting, distributing and storing hydrogen, in particular for storing hydrogen, comprising, from the inside to the outside, a sealing layer (1) and at least one composite reinforcing layer (2), said sealing layer comprising, from the inside to the outside, a layer (a) of a composition comprising mainly short-chain polyamide thermoplastic polymers, more than 15% and up to 50% by weight of an impact modifier, or mainly semi-crystalline long-chain polyamide thermoplastic polymers, up to 50% by weight of an impact modifier, relative to the total weight of the composition, and up to 3% by weight of a plasticizer, optionally a layer of a binder, in particular a fluoropolymer, in particular PVDF. or a hydrogen barrier layer made of EVOH, optionally a layer of a binder, and a layer (b) consisting of a composition comprising mainly a short-chain polyamide thermoplastic polymer and more than 15% and up to 50% by weight of an impact modifier, or mainly a semi-crystalline long-chain polyamide thermoplastic polymer, up to 50% by weight of an impact modifier, and up to 3% by weight of a plasticizer, wherein the innermost composite reinforcing layer (2) is wound around the sealing layer (1), and at least one of the composite reinforcing layers consists of a fibrous material in the form of continuous fibers impregnated with a composition comprising mainly at least one polymer P1j, where j = 1 to m, and m is the number of reinforcing layers.

The present invention provides a multilayer structure intended for transporting, distributing, or storing hydrogen. [Solution] A multilayer structure comprising at least one sealing layer (1) and at least one composite reinforcing layer (2) from the inside out, wherein the innermost composite reinforcing layer is wound around the outermost layer adjacent to the sealing layer, the sealing layer mainly comprises at least one semicrystalline long-chain polyamide thermoplastic polymer P1i (i=1 to n, where n is the number of sealing layers), its Tm is greater than 160°C, and except for one polyether block amide (PEBA), it contains up to 50% by weight of an impact resistance modifier and up to 1.5% by weight of a plasticizer based on the total weight of the composition, and does not contain a nucleating agent, and at least one of the composite reinforcing layers is made of a fibrous material in the form of continuous fibers impregnated with a composition mainly comprising at least one polymer P2j (j=1 to m, where m is the number of reinforcing layers), epoxy resin or epoxy-based resin.

Provided is a steel pipe or tube for hydrogen gas that has both excellent hydrogen embrittlement resistance and high productivity and can be used very suitably as parts of pressure vessels for hydrogen gas. The steel pipe or tube for hydrogen gas having a finish-polished inner surface, in which the inclination angle of a polishing trace present on the inner surface with respect to a circumferential direction of the steel pipe or tube for hydrogen gas is 0° to 30°.

A lightweight reduced pressure hydrogen supply device suitable for a hydrogen energy handheld torch includes a cylinder mouth valve (3), a pressure reducing valve (4), an opening / closing assembly (5), an opening / closing execution member, and a gas cylinder cap (8). The pressure reducing valve (4) has three connection ports: a lower connection port (4-1) connected to the gas cylinder cap (8), an upper connection port (4-2) connected to the burner (2), and a side connection port (4-3) for mounting the opening / closing assembly (5). The opening / closing execution member and the cylinder mouth valve (3) are attached inside the gas cylinder cap (8). The opening / closing assembly (5) controls the opening / closing execution member to realize the opening and closing of the cylinder mouth valve (3). The cylinder mouth valve (3) is connected to the cylinder mouth of the gas cylinder (1) and is used to open and close the gas cylinder. This lightweight reduced pressure hydrogen supply device is used to open and close gas cylinders, reduce pressure of high pressure hydrogen, and seal hydrogen by connecting the gas cylinder and burner in series in a hydrogen energy handheld torch combustion system. It solves problems such as large pressure reduction ratio pressure reduction, highly reliable sealing, and low opening and closing torque, and has advantages such as a wide temperature range, small size, and light weight.

The present invention relates to a multi-layer structure for transporting, distributing and storing hydrogen, comprising, from the inside to the outside, a sealing layer (1) and at least one composite reinforcing layer (2), the innermost composite reinforcing layer being wrapped around the sealing layer (1), the sealing layer consisting essentially of a composition comprising a polyamide thermoplastic polymer PA11, up to 15% by weight of an impact modifier relative to the total weight of the composition, in particular up to 12% by weight of an impact modifier, and up to 1.5% by weight of a plasticizer relative to the total weight of the composition, the composition being devoid of nucleating agents and polyether block amide (PEBA), at least one of the composite reinforcing layers consisting of a fibrous material in the form of continuous fibers impregnated with at least one polymer P2j, where j=1 to m, m being the number of reinforcing layers, in particular a composition comprising mainly an epoxy or epoxide-based resin, the structure being devoid of an outermost layer, adjacent to the outermost composite reinforcing layer being made of a polyamide polymer.

This invention discloses a method for low-pressure storage and mixing of hydrogen, relating to the field of hydrogen energy utilization technology. The invention designs a novel low-pressure hydrogen storage tank with an internal piston chamber structure. The piston moves vertically along the inner wall of the tank. Below the piston is the hydrogen storage chamber, with an inlet and outlet pipe connected to its lower outer end. A counterweight is placed above the piston depending on the operating condition. Hydrogen is produced using an atmospheric pressure hydrogen production device. The produced hydrogen is separated, purified, and connected to the inlet pipe of the hydrogen storage chamber. The outlet pipe of the hydrogen storage chamber is divided into two lines, connecting to a medium-pressure mixing pipeline and a low-pressure mixing pipeline respectively. A compressor is connected to the medium-pressure mixing pipeline, and its outlet is connected to the inlet of the medium-pressure mixing pipeline. The outlet of the low-pressure mixing pipeline is connected to the inlet of the low-pressure mixing pipeline. This invention eliminates the need for constructing a dedicated hydrogen delivery pipeline, resulting in low cost and good safety.

The utility model relates to the technical field of liquid hydrogen storage, in particular to an internal heat exchange system of a skid-mounted liquid hydrogen refueling station. The top of the liquid hydrogen storage tank is connected with the buffer tank through a pipeline, the buffer tank is connected with a gas inlet of the hydrogen booster pump through a pipeline, a gas outlet of the hydrogen booster pump is connected with the first-stage hydrogen cooler through a pipeline, and the first-stage hydrogen cooler is connected with the high-pressure buffer tank through a pipeline. The high-pressure buffer tank is connected with a secondary hydrogen cooler through a pipeline; the bottom of the liquid hydrogen storage tank is connected with the liquid hydrogen bottle through a pipeline, a liquid outlet of the liquid hydrogen booster pump is connected with an inlet of the heat exchange and cold supply assembly through a pipeline, and an outlet of the heat exchange and cold supply assembly is connected with the high-pressure buffer tank through a pipeline. The first-stage hydrogen cooler and the second-stage hydrogen cooler provide heat sources for the heat exchange and cold supply assembly to enable liquid hydrogen to be gasified, and the heat exchange and cold supply assembly provides cold sources for the first-stage hydrogen cooler and the second-stage hydrogen cooler to cool hydrogen, so that a large amount of energy can be saved, and the purposes of saving energy and reducing consumption are achieved.

Systems, methods, and apparatus for transporting and distributing hydrogen, storing energy on a large scale, and interconnecting locations where large quantities of "green" hydrogen can be most advantageously produced with cities, towns, and rural communities where hydrogen is needed for clean transportation fuel, industrial feedstock, power generation, and long-term storage of electricity. The hydrogen distribution pipeline enables the use of existing natural gas, oil, and other pipelines to transport hydrogen to one or more distribution points, and in one embodiment incorporates lighter-than-air airships to transport hydrogen between locations where pipelines do not exist or are impractical. The disclosed hydrogen distribution pipeline also enables the use of existing water, sewer, stormwater, and other pipelines for localized distribution, thereby saving time, money, and reducing construction disruption for communities in establishing these infrastructure elements necessary for widespread use of hydrogen to address climate change.

The utility model discloses a natural gas hydrogen doping and mixing device which comprises a device body, a circulation channel used for gas circulation is arranged in the device body, and the gas inlet end and the gas outlet end of the circulation channel are respectively provided with a rotary flange assembly. The rotating flange assembly comprises an inserting pipe, a connecting flange is arranged at one end of the inserting pipe, the other end of the inserting pipe is inserted into the circulation channel, and a sealing bearing is arranged between the inserting pipe and the device body. The utility model further provides a natural gas hydrogen-doped and hydrogen-mixed online conveying system which comprises a first natural gas conveying pipe and a second natural gas conveying pipe, and the natural gas hydrogen-doped and hydrogen-mixed device is installed between the first natural gas conveying pipe and the second natural gas conveying pipe. A hydrogen conveying pipe is connected to the first natural gas conveying pipe, and mounting flanges are arranged at the ends, facing the natural gas hydrogen doping and mixing device, of the first natural gas conveying pipe and the second natural gas conveying pipe correspondingly. The natural gas hydrogen-doped and mixed on-line conveying system has the advantage of being convenient to install.

This invention belongs to the field of cryogenic engineering research and application technology, specifically relating to a vacuum socket device for receiving and transferring liquid hydrogen. The device includes a sealing tube I, an outer tube I, a connecting tube I, an integral flange, a sealing tube II, a connecting tube II, an inner tube, a flange shoulder, an outer tube II, a flange ring, a threaded seal, a sealing ring, and a gasket. The protruding structure of the threaded seal, the annular gap B, and the large-diameter end face of the flange shoulder form chamber A. The annular gap A and the shoulder of the sealing tube II form chamber B. Chamber B communicates with an evacuation port machined on the side wall of the outer tube II. When a vacuum is drawn through the evacuation port, chamber B forms a vacuum chamber. The sealed chamber A is located outside the vacuum chamber B. This double-layered chamber enhances the effect of preventing heat exchange between liquid hydrogen and the external environment, significantly reducing evaporation loss of liquid hydrogen during transfer and reception. The socket joint has a flange connection structure, facilitating disassembly and improving the adaptability of the equipment.

This invention discloses a liquid hydrogen cold storage device and method, comprising several sealed containers nested from the inside out to form a multi-layered container system. Gaps are formed between adjacent sealed containers, and a phase-change medium is filled between the layers of the sealed containers. The vacuum freezing point of the phase-change medium is lower than the boiling point of hydrogen at atmospheric pressure. Supports are provided between the sealed containers for fixation. A high-vacuum wound insulation layer is provided outside the outermost sealed container, and an outer protective layer is placed over this high-vacuum wound insulation layer. This device uses a double-layer insulation structure to store liquid hydrogen, with the outer layer using high-vacuum wound insulation and the inner layer using low-pressure, high-purity nitrogen for pre-cooling and freezing to create absolute vacuum insulation. This device can be used for the storage of liquid hydrogen, facilitating the use and transportation of hydrogen.

This utility model discloses a natural gas-hydrogen blending gas supply station integrating photovoltaic hydrogen production and dynamic blending, including a green hydrogen production and storage section, a natural gas storage and pressure regulation section, and a dynamic proportioning blending device. Both the green hydrogen production and storage section and the natural gas storage and pressure regulation section are connected to the dynamic proportioning blending device. The output terminals of the hydrogen and natural gas inputs to the dynamic proportioning blending device are linked and controlled. The dynamic proportioning valves at the output terminals of the green hydrogen production and storage section and the natural gas storage and pressure regulation section are dynamically adjusted according to the pressure feedback controller installed in the dynamic proportioning blending device. The application of this utility model can solve the technical problems of existing natural gas-hydrogen blending supply systems, such as reliance on external hydrogen source transportation, lagging hydrogen blending ratio adjustment, and low efficiency of multi-module collaboration, achieving precise control of the hydrogen blending ratio and low-carbon operation.

The present invention provides a hydrogen supply and demand system and a hydrogen supply and demand method capable of visualizing a temporal change in a hydrogen concentration in a gas grid for appropriate monitoring and control of the hydrogen concentration. The hydrogen supply and demand system and the hydrogen supply and demand method, for a gas grid including a gas pipeline filled with hydrogen gas and other gas, output a simulation result in consideration of a gas flow, convection caused by gas extraction or injection under pressure, and a diffusion state, using fluid information in the gas grid, pipeline / gas injection mechanism shape information, and operation schedules of a hydrogen supply site and a gas use site as inputs, and visualize a temporal change in a hydrogen concentration at an arbitrary point in the gas grid.

A continuous thermal hydrogen compression system, and methods of thermally compressing hydrogen, are disclosed. A hydrogenation module accepts a hydrogen gas stream to be absorbed or adsorbed to a lean carrier stream through heat removal, thereby producing a heat output and a rich carrier stream containing absorbed or adsorbed hydrogen. A pump, connected to an output of the hydrogenation module, increases the pressure of the rich carrier stream to produce a pressurized rich carrier stream. A dehydrogenation module separates, via an addition of heat, a pressurized hydrogen gas stream from the pressurized rich carrier stream to produce a lean carrier stream. A pressure reducing device reduces the pressure of the lean carrier stream before it is returned to the hydrogenation module. The carrier stream is cycled continuously between the hydrogenation module and the dehydrogenation module.

The invention discloses a natural gas circulation hydrogen-doped conveying system and process method, and relates to the field of natural gas equipment and process, the natural gas circulation hydrogen-doped conveying system comprises a circulation mixing module, a hydrogen storage module, a natural gas conveying module and a test module, and a pipeline for communicating the circulation mixing module and the hydrogen storage module is provided with a first control valve; a second control valve is arranged on a pipeline through which the circulating mixing module is communicated with the natural gas conveying module, and a third control valve is arranged on a pipeline through which the circulating mixing module is communicated with the test module; and the circulating mixing module can circularly mix the residual hydrogen-doped natural gas after the test module receives the hydrogen-doped natural gas. By arranging the circulating mixing module, the residual hydrogen-doped natural gas in a single test can be circularly mixed, so that the purposes of continuously carrying out hydrogen doping tests in different proportions, reducing the occupied area and reducing energy waste are achieved.

A hydrogen gas supply apparatus includes a compressor configured to compress hydrogen gas and supply the hydrogen gas compressed to a pressure accumulator which accumulates the hydrogen gas, an adsorption column disposed between the discharge port of the compressor and the pressure accumulator, and configured to include an adsorbent for adsorbing impurities in the hydrogen gas discharged from the compressor, and a plurality of valves disposed at the gas inlet / outlet port side of the adsorption column, being at a discharge port side of the compressor, and configured to be able to seal the adsorption column, wherein the space in the adsorption column is sealed using the plurality of valves such that the inside of the adsorption column is maintained to have a high pressure by the hydrogen gas compressed in the case where the compressor is stopped.

The present application belongs to hydrogen energy utilization technical field, disclose a kind of gas boiler hydrogen removal hydrogen mixing process system, including hydrogen removal unit and hydrogen mixing unit;Hydrogen removal unit is used to connect hydrogen transport equipment, receives hydrogen gas output by hydrogen transport equipment, and the hydrogen gas received is transported to hydrogen mixing unit after decompression;Hydrogen mixing unit includes hydrogen pipeline, natural gas pipeline, static mixer and control module;The inlet of hydrogen pipeline is connected with the outlet of hydrogen removal unit, for receiving the hydrogen gas after decompression;The inlet of natural gas pipeline is used to connect the natural gas source outside;Control module is configured to feed forward control hydrogen flow according to natural gas flow in natural gas pipeline, and correct hydrogen flow according to hydrogen concentration of static mixer outlet feedback;Effectively solve the problem that existing technology depends on calorimeter for feedback regulation, leading to response lag, difficult to accurately control hydrogen proportioning amount according to natural gas flow change in time, resulting in mixed gas concentration fluctuation, poor combustion stability.

The utility model relates to a stable and automatic gas supply device for a hydrogen production machine under a buffer-free condition, which comprises a hydrogen production device and a use terminal, and the hydrogen production device is connected with the use terminal through a conveying pipeline; the three-way valve is arranged on the conveying pipeline between the hydrogen production device and the use terminal, and a bypass valve port of the three-way valve is connected with a flame arrester through an emptying pipeline. According to the utility model, hydrogen is generated by the small-sized hydrogen production device, the gas supply pressure and the power of the hydrogen production device are adjusted under the manual operation of the three-way valve or the PLC control, the hydrogen is stably supplied to the use terminal, the hydrogen emission is reduced to the greatest extent, and the electric energy consumption is reduced.

The utility model relates to an automatic cleaning and maintaining device for a hydrogen energy pipeline, which comprises a shaft lever, and positioning plates are arranged at two ends of the shaft lever. The utility model relates to the technical field of hydrogen energy pipeline cleaning and maintaining equipment. According to the automatic cleaning and maintaining device for the hydrogen energy pipeline, the air pump inflates the sealing bag, so that the sealing bag expands and makes contact with the inner pipe wall of the hydrogen energy pipeline, at the moment, the positioning plates at the two ends and the inner wall of the pipeline form a closed cavity, and meanwhile the air pump continuously inflates the sealing bag; the sealing bag can effectively fill a gap between the positioning plate and the inner wall of the hydrogen pipeline, so that the positioning plate and the inner wall of the pipeline form a sealing state, and when the air pump inflates the sealing bag, the air pump can inflate air in the sealing cavity into the sealing bag, so that the air pressure in the sealing cavity is reduced, and meanwhile, the volume of hydrogen is reduced; the possibility of explosion can be effectively reduced, and meanwhile, the harm of explosion is reduced.

The present invention provides a multilayer structure configured for transporting, distributing, or storing hydrogen. [Solution] A multilayer structure comprising a sealing layer (1) and at least one composite reinforcing layer (2) from the inside out, wherein the sealing layer comprises a layer (a) made of a composition mainly comprising a short-chain polyamide thermoplastic polymer, an impact-resistant modifier of more than 15% and up to 50% by weight, or mainly a semi-crystalline long-chain polyamide thermoplastic polymer, an impact-resistant modifier of up to 50% by weight relative to the total weight of the composition, and a plasticizer of up to 3% by weight relative to the total weight of the composition, a hydrogen barrier layer made of PVDF or EVOH, and a layer (b) (=layer (a)), the innermost part of the composite reinforcing layer (2) is wound around the sealing layer (1), and at least one of the composite reinforcing layers is made of a fibrous material in the form of continuous fibers impregnated with a composition mainly comprising at least one polymer P1j, where j=1 to m, and m is the number of reinforcing layers.

This disclosure relates to a method and system for high-stability hydrogen storage and transportation technology. The system includes a hydrogen storage main line, a hydrogen storage unit, a hydrogen export compressor, and the hydrogen export main line connected sequentially. The hydrogen buffer branch line has a first operating state and a second operating state that can be switched between each other. In the first operating state, the hydrogen buffer branch line is not connected to the hydrogen storage main line, and the outlet of the hydrogen storage unit is connected to the hydrogen inlet of the hydrogen export compressor via the hydrogen storage main line, allowing hydrogen to directly enter the hydrogen export compressor from the hydrogen storage main line. In the second operating state, the outlet of the hydrogen storage unit is connected to the hydrogen inlet of the hydrogen export compressor via the hydrogen buffer branch line. Using the system of this disclosure, the unstable characteristics of the hydrogen production process can be balanced, system energy consumption can be reduced, equipment utilization can be improved, and equipment safety can be enhanced.

The invention relates to a safety monitoring automatic control pressure regulating device for petroleum and natural gas storage and transportation engineering, and belongs to the technical field of gas storage and transportation, the safety monitoring automatic control pressure regulating device for petroleum and natural gas storage and transportation engineering comprises a natural gas storage tank, a hydrogen storage tank and a natural gas transportation assembly; a hydrogen transmission assembly; a hydrogen doping tank; a monitoring mechanism; an analysis mechanism; a lower hydrogen doping mechanism and an upper hydrogen doping mechanism. Through cooperative use of the upper hydrogen doping mechanism and the lower hydrogen doping mechanism, natural gas and hydrogen are uniformly diffused in an upper hydrogen doping box and a lower hydrogen doping box, and after uniform diffusion, the natural gas and the hydrogen are discharged downwards and upwards through an upper gas homogenizing pipe and a lower gas homogenizing pipe, so that the hydrogen-doped natural gas discharged downwards and upwards impacts each other; therefore, the uniformity of the natural gas and the hydrogen injected into the hydrogen-doped tank is ensured, the situation that the hydrogen is light and evenly distributed on the upper layer of the natural gas, consequently, the discharged hydrogen-doped natural gas is not uniform, and the quality of the hydrogen-doped natural gas is affected is avoided, and the storage and transportation uniformity of the hydrogen-doped natural gas is ensured.

The invention relates to the technical field of clean energy and fuel gas transmission and distribution, in particular to a natural gas hydrogen doping device and a natural gas hydrogen doping method, and the device comprises a hydrogen pipeline system and a natural gas pipeline system which are sequentially connected through a mixing pipeline system. The method is based on an ideal gas state equation, and comprises the following steps: firstly, filling natural gas into a mixed pipeline system to an initial pressure P2; then calculating target pressure P1 according to a formula P1 = P2 / (1-x%) according to a target hydrogen volume ratio x%; and then the hydrogen injection pressure of the hydrogen pipeline system is set to be P1, and hydrogen is filled into the mixing pipeline until the pressure reaches P1, so that the hydrogen-doped natural gas with the preset proportion is obtained. The pure mechanical pressure control principle is adopted, complex electric control and online analysis systems are omitted, and the device has the advantages of being low in cost, simple in structure, convenient to operate, rapid to deploy, high in reliability and the like, and is particularly suitable for small-flow, temporary or movable natural gas hydrogen doping application scenes.

The present invention relates to a multilayer structure for the transport, distribution and storage of hydrogen, in particular for the storage of hydrogen, comprising from the inside out a sealing layer (1) and at least one composite reinforcement layer (2), said sealing layer comprising from the inside out: a layer (a) consisting of a composition comprising mainly: a short-chain polyamide thermoplastic polymer, more than 15% and up to 50% by weight of an impact modifier, or mainly: a semi-crystalline long-chain polyamide thermoplastic polymer, up to 50% by weight of an impact modifier with respect to the total weight of the composition, up to 3% by weight of a plasticizer with respect to the total weight of the composition; optionally a binder layer; a hydrogen barrier layer, in particular made of a fluoropolymer, in particular PVDF, or EVOH; optionally a binder layer; a layer (b) consisting of a composition comprising mainly: a short-chain polyamide thermoplastic polymer, more than 15% and up to 50% by weight of an impact modifier, or mainly: a semi-crystalline long-chain polyamide thermoplastic polymer, up to 50% by weight of an impact modifier, up to 3% by weight of a plasticizer, said innermost composite reinforcement layer (2) being wound around said sealing layer (1) and at least one of said composite reinforcement layers consisting of a fibrous material in the form of continuous fibers impregnated with a composition comprising mainly at least one polymer P1j, j = 1 to m, m being the number of reinforcement layers.

A liquefied hydrogen facility (1) includes: a storage tank (2) that stores liquefied hydrogen; a first transport line (4) that connects the storage tank (2) and a carrier (100) so that a boil-off gas in a gas phase portion (2a) in the storage tank (2) can be guided to the carrier (100); a compression device (12) provided on the first transport line (4) and sucks the boil-off gas from the storage tank (2) and sends out the boil-off gas to the carrier (100); and a heat exchanger (13) provided on a downstream side of the compression device (12) on the first transport line (4); and a second transport line (5) that is disposed to extend from the storage tank (2) to a consumer (110) through the heat exchanger (13) and guides, from the storage tank (2) to the heat exchanger (13), hydrogen having a temperature lower than a temperature of a boil-off gas after being compressed by the compression device (12).

The invention provides a liquid hydrogen refueling station filling system and a control method thereof. The liquid hydrogen refueling station filling system comprises a liquid hydrogen storage container, a liquid hydrogen transmission pipeline, a hydrogen buffer tank device, a hydrogen filling pipeline and a control device. One ends of the liquid hydrogen transmission pipeline and the hydrogen buffer tank device are connected with the liquid hydrogen storage container, and the other ends of the liquid hydrogen transmission pipeline and the hydrogen buffer tank device are connected with the hydrogen filling pipeline; a first pressure regulating valve is arranged on the liquid hydrogen transmission pipeline, a second pressure regulating valve is arranged on the hydrogen filling pipeline, and the control device iteratively regulates the opening degree of the first pressure regulating valve based on the real-time temperature and iteratively regulates the opening degree of the second pressure regulating valve based on the real-time pressure. Through cooperative control of the first pressure regulating valve and the second pressure regulating valve, it is ensured that the temperature and the filling rate of the mixed filled hydrogen meet the filling requirements, devices such as a premixer do not need to be additionally arranged, the filling parameter control precision is improved, meanwhile, the system structure is simplified, the occupied area of the system is reduced, and the system construction and operation and maintenance cost is reduced.

Proposed is an apparatus for supplying hydrogen to various mobility products using hydrogen as fuel, that is, a hydrogen station. An integrated and mobile automatic hydrogen station achieves miniaturization by increasing space efficiency by adopting a structure that can supply high-pressure hydrogen directly from a hydrogen generating source without having a hydrogen storage tank so as to facilitate movement to sites operating hydrogen-fueled mobility products and ensure the airtightness of a gas supply path at the same time, and measures physical state variables such as pressure and temperature of gas being supplied in real time and automatically controls a supply process on the basis of the measurement so as to increase gas filling efficiency while improving safety and user convenience of a filling process.