306 results about "High pressure hydrogen" patented technology

The invention belongs to the technical field of metal composite materials and hydrogen storage and transportation materials, and particularly relates to a high-strength hydrogen-embrittlement-resistant layered metal composite material for hydrogen storage and a preparation method and application of the high-strength hydrogen-embrittlement-resistant layered metal composite material. According to the preparation method, the nickel-saving austenitic stainless steel (NEASS) and the 30CrMo steel are alternately overlapped in a multi-layer mode, and the processes of vacuum electron beam welding, high-temperature hot rolling, accumulative ply rolling, multi-stage heat treatment and the like are combined, so that the composite board with the layer number reaching hundreds of layers, firm interface bonding, excellent mechanical performance and good hydrogen embrittlement resistance is prepared; the technical problem that strength, toughness and hydrogen brittleness resistance of an existing metal material in a high-pressure hydrogen environment are difficult to consider at the same time is solved. The obtained composite material has high strength, high plasticity and excellent hydrogen embrittlement resistance, and is suitable for structural materials of high-pressure hydrogen storage tanks, hydrogen conveying pipelines and other key hydrogen energy equipment.

The invention discloses a high-pressure combustion combined heat and power generation energy storage system and method for hydrogen and oxygen production through electrolysis, and relates to the field of hydrogen energy storage. After the electrolytic cell produces high-pressure hydrogen and oxygen, the high-pressure hydrogen and oxygen are stored in the hydrogen / oxygen storage tank, the system can operate in a hydrogen / oxygen mode, and in the oxygen mode operation, the hydrogen and oxygen steam mixed gas from the oxygen storage tank and the hydrogen / oxygen evaporation compressor are combusted in the high-pressure combustion chamber to generate superheated steam, and then the superheated steam enters the expansion turbine to do work; due to excessive oxygen, dead steam after acting is separated into two working media through a gas-liquid separator, that is, gas enters a cooler to be cooled and then returns to a combustion chamber through a hydrogen / oxygen evaporation compressor, drainage water generated after liquid enters a heat supply heat exchanger is pressurized through a water pump and then enters a high-temperature combustion chamber, and therefore clean utilization of hydrogen energy and cyclic regeneration of the working media are achieved. The system can realize high power generation efficiency and excellent environmental protection performance, and is suitable for regions requiring stable consumption of fluctuating renewable energy sources, power and heat supply and the like.

The invention discloses a high-pressure hydrogen pressure reducing valve with a spiral flow channel structure. The high-pressure hydrogen pressure reducing valve comprises a valve body, a sealing end cover, a needle-shaped valve element and an inlet end cover. A through cavity is formed in the center of the valve body in the axial direction. The sealing end cover, the needle-shaped valve element and the inlet end cover are sequentially and coaxially assembled and connected into the cavity of the valve body from top to bottom. A gas outlet channel is arranged on the side wall of the valve body and located between the sealing end cover and the needle-shaped valve element, a gas inlet channel is arranged at the bottom of the inlet end cover, and gas enters from the gas inlet channel and is exhausted through the gas outlet channel. The needle valve has the advantages of being simple in structure and long in service life, and the two spiral flow channel notches are evenly distributed in the outer surface of the needle valve element; due to the design of the spiral flow channel, the hydrodynamic performance is effectively improved, the reliability of the system is enhanced, and meanwhile the energy utilization rate and the impact resistance are improved; in addition, the pressure of hydrogen at the outlet of the valve body can be effectively controlled through the design of the adjusting channel, and the pressure is still kept relatively stable under extreme conditions.

According to the gas-liquid mixing hydrogen refueling station system with the cooling capacity recovery and gradient utilization functions, flash steam of the low-temperature liquid hydrogen storage tank is collected and stored in the low-temperature hydrogen storage tank, the cooling capacity of the flash steam is fully utilized, cooling capacity is provided for the heat exchanger, high-pressure hydrogen is cooled, the cooling capacity of the low-temperature flash steam of the liquid hydrogen is fully utilized, and the cooling capacity of the low-temperature flash steam of the liquid hydrogen is fully utilized. Energy gradient utilization of cooling capacity is achieved, and loss of extra energy in the hydrogen refueling station is reduced; the flash steam obtained after heat exchange is further used for hydrogen compression, and reutilization of the low-temperature liquid hydrogen flash steam is achieved; the flash steam after heat exchange is pressurized and then cooled by using the cooling capacity of the high-pressure liquid hydrogen, and meanwhile, the heating gasification of the high-pressure liquid hydrogen is realized, namely the gasification of the pressurized liquid hydrogen in the liquid hydrogen refueling station and the cooling of a gas hydrogen pressurization process in the liquid hydrogen refueling station are coupled for heat exchange, so that the utilization efficiency of the heat and the cooling capacity is greatly improved; an external vaporizer is not needed for high-pressure liquid hydrogen gasification, an external cooler is not needed in the gas-hydrogen pressurization process, and energy consumption is greatly reduced.

The invention relates to a high-pressure hydrogen nano-pore permeability testing device and method based on double-chamber pressure balance, and belongs to the technical field of unconventional oil gas. The device comprises a high-pressure gas source, a pressurization module, a double-layer nested core reaction kettle module and a high-frequency data acquisition and safety monitoring module; by constructing a double-layer nested structure that inner cavity hydrogen is actively wrapped by outer cavity nitrogen and cooperating with an all-metal knife edge hard sealing device and a different flow pattern permeability calculation method, accurate measurement of the Ndarcy grade permeability of the compact cover rock is successfully achieved, the industrial pain point that a traditional device is inaccurate in measurement, unstable in measurement and unsafe is thoroughly solved, and the method is suitable for large-scale popularization and application. And key experimental technology guarantee and scientific data support are provided for closure evaluation of underground hydrogen storage engineering and exploration and development of natural hydrogen resources.

The hydrogen transmission pipeline steel comprises the following chemical components in percentage by mass: 0.020%-0.045% of C, 0.11%-0.19% of Si, 1.45%-1.65% of Mn, less than or equal to 0.0010% of S, less than or equal to 0.008% of P, 0.015%-0.045% of Al, 0.040%-0.060% of Nb, 0.020%-0.035% of Ti, 0.30%-0.50% of Cr, 0.0040%-0.0080% of RE, less than or equal to 0.004% of N, less than or equal to 0.0015% of O, less than or equal to 0.0001% of H and the balance of Fe and other inevitable impurities, the conditions that the carbon equivalent Ceq = C + Mn / 6 + (Cr) / 5 is less than or equal to 0.35%, the Nb / Ti = the rare earth element is selected from at least one of lanthanum, cerium and neodymium. The invention aims to solve the technical problems that the existing hydrogen transmission pipeline steel is easy to generate hydrogen embrittlement, short in fatigue life and high in production cost in a high-pressure hydrogen environment, and meets the core requirements of hydrogen energy long-distance transmission pipeline engineering on high strength, high hydrogen embrittlement resistance, high fatigue performance and low cost of materials.

The invention discloses a large-duration double-source combined supply emergency security vehicle and a control method thereof.The emergency security vehicle comprises a photovoltaic system, a lithium battery system, a hydrogen production system and a hydrogen storage system, the photovoltaic system is connected with the lithium battery system and the hydrogen production system, and the hydrogen production system is connected with the hydrogen storage system; the lithium battery system comprises a fuel cell and a power lithium battery, and the fuel cell is electrically connected with the power lithium battery; the hydrogen production system comprises a PEM electrolytic bath; the hydrogen storage system comprises a modularized hydrogen cylinder group, the power lithium battery is connected with the PEM electrolytic bath through a DC / DC converter, and the PEM electrolytic bath is connected with the modularized hydrogen cylinder group through a high-pressure hydrogen pipeline; the external hydrogen charging interface is communicated with the modularized hydrogen cylinder group, and the modularized hydrogen cylinder group is communicated with a hydrogen inlet of the fuel cell; the method has the advantages that the power and the cruising ability are improved.

The invention discloses a high-pressure sealing ball valve for hydrogen, and relates to the technical field of ball valves, the high-pressure sealing ball valve comprises a first valve body and a second valve body, the first valve body and the second valve body are detachably and fixedly connected, and a sealing ring is arranged at the joint of the first valve body and the second valve body; the second valve body fixedly communicates with a valve seat, a valve rod is rotationally arranged in the valve seat, and a valve opening and closing mechanism is jointly installed between the first valve body and the second valve body. The valve has the advantages that pressure self-adaptive adjustment and dynamic adaptation to working condition fluctuation are achieved through opening, closing and sealing actions, excessive abrasion of components is avoided while sealing reliability is guaranteed, the instantaneous leakage risk of a traditional valve in the opening and closing stage is reduced, meanwhile, impact damage and operation resistance of the components are remarkably reduced by means of multiple buffering structures and friction optimization, and the service life of the valve is prolonged. The operation and maintenance convenience of equipment is improved, the service life is effectively prolonged, and the harsh working condition requirement of high-pressure hydrogen conveying is met.

The utility model relates to the technical field of coal chemical industry, in particular to a device for simulating scaling stability in a coal-oil slurry transportation process. Comprising a coal-oil slurry stirring tank connected with a high-pressure hydrogen pipe, the coal-oil slurry stirring tank is connected with one end of a simulation conveying pipe through a feeding pipe, the other end of the simulation conveying pipe is connected with a coal-oil slurry buffer tank through a discharging pipe, the coal-oil slurry buffer tank is connected with the coal-oil slurry stirring tank through a circulating pipe, and a coal-oil slurry circulating pump is arranged on the circulating pipe; an oil-coal-slurry conveying pump is arranged on the feeding pipe, the feeding pipe is connected with a plurality of feeding branch pipes, each feeding branch pipe is provided with a branch pipe valve and a branch pipe flowmeter, the discharging pipe is connected with a plurality of discharging branch pipes, and the two ends of a plurality of simulation conveying pipes with different inner diameters are connected with the feeding pipe and the discharging pipe through the feeding branch pipes and the discharging branch pipes respectively. A plurality of pressure gauges are arranged on the simulation conveying pipe at intervals, and a heat tracing sleeve is arranged outside the simulation conveying pipe. The device is reasonable in structural arrangement, and is favorable for mastering the scaling risk of the coal-oil slurry in advance in the production process so as to carry out response treatment in time.

The invention provides a device and a method for reducing exhaust loss by using the pressure of a liquid hydrogen storage tank, and relates to the technical field of liquid hydrogen storage and transportation safety. The device comprises an adsorption storage assembly, a desorption recovery assembly and an adsorption enhancement assembly which are arranged in a gas pillow of the liquid hydrogen storage tank. The adsorption and storage assembly is communicated with the air pillow through a one-way mechanical low-temperature valve, is internally provided with a solid adsorption material and a vacuum heat insulation cylinder, and is used for adsorbing and storing evaporation gas and reducing the tank pressure when the tank pressure is increased; the adsorption enhancing assembly comprises a low-temperature hydrogen regulating valve and a low-temperature heat exchanger, and the throttling effect of high-pressure hydrogen in the tank is used for refrigerating an adsorption material, so that the adsorption capacity of the adsorption material is improved; the desorption recovery assembly heats an adsorption material through an intermediate heater, and controllable release of hydrogen is achieved. According to the invention, the active management of the pressure of the liquid hydrogen storage tank and the efficient recovery of the boil-off gas are realized, the exhaust period is obviously prolonged, the hydrogen loss is reduced, and the storage and transportation economy and safety are improved.

The invention discloses an operation method and system of a liquid-gas dual-mode liquid hydrogen refueling station, the system realizes the switching of a refueling route through a plurality of liquid hydrogen control valves and a control switch of a gas hydrogen control valve, liquid hydrogen output from a liquid hydrogen storage tank is primarily pressurized through a first liquid hydrogen booster pump, and in the liquid hydrogen refueling route, the liquid hydrogen output from the liquid hydrogen storage tank is pressurized through a second liquid hydrogen booster pump. The liquid hydrogen pressurized for the first time is in a supercooled state and is not easy to evaporate, the generation of BOG is greatly inhibited, the leakage amount of the liquid hydrogen in a liquid-liquid filling process can be reduced, the filling efficiency is improved, in a high-pressure hydrogen filling route, the liquid hydrogen in a supercritical state can also effectively reduce the cavitation problem of a pump during secondary pressurization, waste of liquid hydrogen cold energy is reduced, and the production cost is reduced. High volume efficiency can be effectively guaranteed, and durability of equipment and efficient operation of the hydrogen refueling station are guaranteed.

The invention discloses a hydrogen brittleness performance evaluation method for a hydrogen transport pipeline, which comprises the following steps: obtaining the average hydrogen concentration in a sample through a high-pressure hydrogen permeation test of a wafer sample, and obtaining the hydrogen concentration and hydrogen diffusion coefficient of the surface of the sample under a specific electrochemical hydrogen charging condition through an electrochemical hydrogen charging test of the wafer sample; a finite element analysis model of a target sample is established to simulate the change relation of the total amount of hydrogen atoms in the target sample along with time under the electrochemical hydrogen charging condition, and the electrochemical hydrogen charging time equivalent to the high-pressure gaseous hydrogen charging is obtained by comparing the high-pressure gaseous hydrogen charging with the electrochemical hydrogen charging. The target sample is charged with hydrogen through an electrochemical hydrogen charging method, and finally the hydrogen embrittlement performance of the target sample is obtained through a hydrogen embrittlement performance test. According to the method, simple finite element simulation and electrochemical hydrogen charging are combined, high-pressure gaseous hydrogen charging which is complex, low in efficiency and high in danger is replaced, and the detection time of the hydrogen embrittlement performance test of the hydrogen charging pipe is shortened.

The application relates to the technical field of steel production, in particular to a hydrogen embrittlement resistant pipeline steel and a preparation method and application thereof. The metallographic structure of the pipeline steel comprises a tempered sorbite structure and nano precipitate particles; the tempered sorbite structure comprises a ferrite matrix and carbide; the grain size of the ferrite is greater than or equal to 10 levels, and the volume fraction of the carbide is less than or equal to 10%; the diameter of the nano precipitate particles is less than or equal to 20 nm. The application solves the technical problem that the existing pipeline steel is prone to hydrogen damage in a high-pressure hydrogen environment, avoids the contradiction between high strength and hydrogen embrittlement resistance, and makes the hydrogen conveying pipeline steel have high strength, high toughness, low hardness and excellent hydrogen embrittlement resistance, so that the hydrogen conveying pipeline steel can meet the use requirements of high-pressure (greater than or equal to 10 MPa) hydrogen conveying.

The utility model discloses a metal material constant load testing device suitable for a hydrogen environment, which comprises a high-pressure gas storage bin, the high-pressure gas storage bin is hermetically connected with an upper bin cover and a lower bin cover, the upper bin cover is provided with a gas inlet pipeline, the lower bin cover is provided with a gas outlet pipeline, the high-pressure gas storage bin is filled with hydrogen, the upper bin cover is provided with an upper loading rod, and the lower bin cover is provided with a lower loading rod. The upper end of an upper loading rod is connected with a loading head, the lower end of the loading rod extends into the high-pressure gas storage bin, a load sensor is installed on the upper loading rod, a lower loading rod is arranged on the lower bin cover, the upper end of the lower loading rod extends into the high-pressure gas storage bin, the lower end of the lower loading rod is connected with a base, the lower end of the upper loading rod is provided with an upper connector, and the upper connector is connected with a lower connector. A lower connector is arranged at the upper end of the lower loading rod, a constant-load sample is connected between the upper connector and the lower connector, an extensometer is mounted on the constant-load sample, and a temperature sensor and a pressure sensor are mounted in the high-pressure gas storage bin. According to the utility model, a high-pressure hydrogen test environment can be effectively provided, and the performance test of a metal material under a constant load is realized.

The utility model relates to the technical field of hydrogen storage equipment, in particular to a gas supply device, a bottleneck combination valve and a hydrogen storage bottle group. The air supply device comprises an air supply pipeline, a valve seat, an air supply one-way valve, an overflowing protection valve and a filtering mechanism. The valve seat, the air supply one-way valve, the overflowing protection valve and the filtering mechanism are all arranged in the air supply pipeline; the air supply one-way valve is used for making contact with the valve seat and sealing the air supply pipeline when bearing preset pressure difference larger than the first direction. The overflowing protection valve is used for making contact with the valve seat and sealing the air supply pipeline when bearing the preset pressure difference larger than the second direction. By arranging the gas supply one-way valve, in the hydrogen filling process, high-pressure hydrogen is prevented from passing through the high-pressure electromagnetic valve, and then the influence of temperature and flutter on the service life of the high-pressure electromagnetic valve in the filling process is avoided; when the downstream pipeline of the bottle opening combination valve is broken and the flow is increased abnormally, the gas supply pipeline is closed through the overflowing protection valve, and abnormal discharge is avoided.

The application is a gradually expanding high-pressure hydrogen pressure reducing valve, comprising: a first valve body with an air inlet; a second valve body fixed on the top of the first valve body, with a pressure reducing cavity between the first valve body and the second valve body; an air outlet on the second valve body; a guide in the pressure reducing cavity; a valve core through the guide; a first elastic member with a spring seat between the bottom of the valve core; an adjusting mechanism on the top of the second valve body, suitable for adjusting the limit stroke of the valve core; a plurality of pressure reducing channels on the surface of the valve core; the pressure reducing channels comprise N pressure reducing grooves connected in a head-to-tail manner, the two connected pressure reducing grooves are arranged in an inclined manner, the first pressure reducing groove to the Nth pressure reducing groove, and the width and depth of the pressure reducing grooves gradually increase; the pressure reducing channels are used for reducing the pressure of hydrogen, and the pressure of high-pressure hydrogen can be reduced to the use range by using a one-stage pressure reducing structure, the structure is simple and compact, small in size, light in weight, and good in reliability.

The invention provides a hydrogen-containing normal saline high-tightness vacuum hydrogen locking packaging preparation method, which belongs to the technical field of medical liquid packaging, and comprises the following steps: pressurizing prepared hydrogen by using a hydrogen booster pump so as to store high-pressure hydrogen; high-pressure hydrogen is rapidly filled into the high-pressure pressure tank to permeate into the single bottle of normal saline, the residual hydrogen is recycled for cyclic utilization, bottled hydrogen-containing normal saline is obtained and put into a composite aluminum foil bag to be subjected to vacuumizing treatment and heat sealing treatment, a high-sealing-performance vacuum hydrogen locking aluminum foil bag packaging piece is obtained, and a finished product is detected. And quickly freezing qualified products, and refrigerating and storing the qualified products to complete hydrogen locking preparation. High-pressure hydrogen permeates into a single bottle of normal saline, the traditional hydrogen permeation period of several hours is shortened to dozens of seconds, the composite aluminum foil bag is vacuumized and subjected to heat sealing treatment, hydrogen escape is effectively inhibited, the quality guarantee effect is remarkable, the process operation is simple, the hydrogen is recycled, the cost is saved, and the method is suitable for mass production.

The invention relates to the technical field of hydrogen storage, in particular to a novel temperature sensor for a high-pressure hydrogen bottle opening valve. Comprising a valve body, the valve body is installed at a bottle opening of a gas bottle, a signal connecting port is formed in the end, located outside the bottle opening, of the valve body, a communicating type protective sleeve is installed in the valve body, the first end of the communicating type protective sleeve extends into the gas bottle, and the second end of the communicating type protective sleeve extends into the valve body. The first end of the communicated protective sleeve is communicated with the interior of the gas cylinder, a temperature sensing element is installed in the first end of the communicated protective sleeve, and the temperature sensing element is electrically connected with the signal connecting port through a connecting wire. The problems that a temperature sensor for a high-pressure hydrogen bottle opening valve is long in response time, and selection of measuring elements is limited are solved.

A system and method for liquefying a hydrogen gas feed stream uses a high-pressure hydrogen stream from a storage source to provide refrigeration to the system. After providing refrigeration to the system, the hydrogen from the high-pressure storage source is at a pressure not lower than the pressure of a cold box feed stream of the system, where the cold box feed stream includes the hydrogen gas feed stream and at least one recycle stream, and is not recycled back through the system but instead exits the system.

The invention relates to the technical field of high-pressure hydrogen storage bottles, in particular to a hydrogen filling nozzle which comprises an injection pipe communicated with a valve inner channel and used for circulation of high-pressure hydrogen and an air nozzle communicated with the injection pipe, formed at the front end of the injection pipe and bent towards an inner container of a bottle body. The connecting line of the circle centers of the end faces of the two ends of the bottle body is a central longitudinal axis, a preset included angle ranging from 5 degrees to 15 degrees is formed between the central line of the air nozzle and the central longitudinal axis, the flowing vortex and turbulence intensity is weakened by guiding high-pressure hydrogen to diffuse along the inner wall of the inner container of the bottle body, and the flowing vortex and turbulence intensity is reduced by guiding the high-pressure hydrogen to evenly diffuse along the inner wall of the bottle body. The device weakens flowing vortex and turbulence intensity, avoids local gas compression heating, further inhibits formation of local temperature hot spots on the surface of the inner container, solves the problem that turbulence and temperature hot spots are easy to form during hydrogen filling in the prior art, and improves the safety and durability of the high-pressure hydrogen storage system.

The utility model provides an exhaust oil removal device of a mechanical piston type compressor, and belongs to the field of high-pressure hydrogen oil removal. The problem that the filter is broken and cannot be used due to large pressure difference inside and outside the filter when the hydrogen compression system is started is solved. A separation cavity and an oil collection cavity are formed in the separation cylinder; the main filter is arranged in the separation cavity; the air distribution valve is provided with a normally open outlet and a partial pressure outlet, the normally open outlet is connected with the interior of the main filter, and the partial pressure outlet is connected with the auxiliary filter; and after the gas distribution valve is subjected to the acting force of compressed gas, the pressure distribution outlet is gradually closed. The device is mainly used for high-pressure hydrogen oil removal.

The application provides a hydrogen fuel gas turbine combined cycle device system and application of cold energy cascade utilization, which comprises a high-pressure hydrogen gas source and processing unit, a hydrogen expander unit, a hydrogen fuel processing unit of a gas turbine, a gas turbine unit power generation unit and a waste heat boiler unit power generation unit connected in sequence. In the application, high-pressure hydrogen gas from the high-pressure hydrogen gas source and processing unit is subjected to pressure energy and cold energy recycling through the hydrogen expander unit, the recycled pressure energy is expanded to do work, and the recycled cold energy is subjected to heat exchange through a heat exchanger, so that hydrogen fuel gas turbine combined cycle system power generation can be carried out more efficiently and at a lower cost, and good economic benefits and environmental benefits are achieved.

This hydrogen-powered electric vehicle comprises an electric drive unit (11) for driving at least one drive wheel of the vehicle, at least one battery (13) for storing electrical energy, at least one fuel cell module (14), a hydrogen tank (15) for the fuel cell, and a hydrogen circuit (16) connected to the tank. The hydrogen circuit includes a high-pressure section (20) corresponding to the tank pressure. (See Figure 3 for abbreviations.)

The invention relates to the technical field of hydrogen storage cylinder pressure relief and detection, and particularly discloses an explosion-proof gas storage cylinder ultimate pressure detection device and a pressure relief structure thereof. When the pressure in the hydrogen storage cylinder abnormally rises and reaches a critical value, the pressure relief mechanism is automatically started, and high-pressure hydrogen is guided to the limit relief connector. In the process, the pressure reducing mechanism intervenes the high-speed hydrogen flow, and the flow speed and pressure of the high-speed hydrogen flow are effectively reduced. When the pressure relief mechanism is started, the pre-fire-extinguishing mechanism is driven to perform pre-fire-extinguishing on hydrogen subjected to pressure reduction by the pressure reduction mechanism, so that controllable and ordered release of high-pressure hydrogen is realized, violent impact caused by instantaneous sudden drop of pressure is avoided, and a fire extinguishing agent can be early intervened in a release path; combustion reaction possibly caused by static electricity or an external fire source is actively inhibited, so that the risk of secondary burning explosion in the discharging process is fundamentally eradicated, and safe jump from passive pressure relief to active explosion suppression is achieved.

The invention discloses a high-strength seamless line pipe for conveying X60-grade high-pressure hydrogen and a manufacturing method of the high-strength seamless line pipe. The high-strength seamless line pipe comprises the following components in percentage by weight: 0.06 to 0.14 percent of C, 0.10 to 0.4 percent of Si, 0.85 to 1.30 percent of Mn, less than or equal to 0.01 percent of P, less than or equal to 0.005 percent of S, 0.1 to 0.8 percent of Mo, 0.02 to 0.06 percent of V, 0.02 to 0.05 percent of Nb, 0.02 to 0.04 percent of Ti, 0.6 to 1.5 percent of Cu and the balance of Fe and other inevitable impurities. The elements also need to simultaneously meet the following conditions: 1 / 3V + 1 / 2Nb + 1 / 4Ti is less than or equal to 0.045%; the yield strength of the obtained seamless line pipe is 420-515 MPa, the tensile strength is 535-650 MPa, and the transverse or longitudinal full-size impact energy at-20 DEG C is larger than or equal to 220 J; the H2 / N2 elongation and the reduction of area in the 15 MPa H2 environment are both greater than or equal to 93%, and the fracture toughness is greater than or equal to 110 MPa / m < 2 >.

Embodiments provide rubber sealants and rubber sealant formulations for use in high pressure hydrogen storage and transportation. Example sealant formulations include mixtures of ethylene propylene diene monomers (EPDMs) or EPDM-like materials, optional thermally conductive fillers, optional hydrogen barrier fillers, reinforcing fillers, liquid rubbers, antioxidants, optional abrasion resistance additives, and curing agents (e.g., cross-linking agents). Example formulations are capable of peroxide curing to produce thermosetting elastomers with excellent thermomechanical properties. Example sealants provide very low equilibrium hydrogen concentrations and reduced swelling.

The invention discloses a hydraulic fatigue test device and method for a high-pressure hydrogen storage cylinder. The test device comprises an oil tank, a hydraulic power unit, a multi-stage pressurization unit, a hydraulic compensation unit, a detection unit and a control unit, an oil inlet of the hydraulic power unit is connected with the oil tank, and an oil outlet is connected with an inlet of the multi-stage supercharging unit through a first pipeline; an outlet of the multi-stage supercharging unit is connected with an inlet of the hydrogen storage bottle through a second pipeline; an outlet of the hydrogen storage bottle is connected to the oil tank through a third pipeline, and a pressure release valve is arranged on the third pipeline; the accommodating cavity of the hydraulic compensation unit is connected with the second pipeline; the control unit is connected with the hydraulic power unit, the hydraulic compensation unit and the detection unit. According to the invention, the pressure stability of + / -0.15 MPa can be realized, and the high fidelity of the fatigue load waveform is ensured.

The invention discloses a hexagonal scandium hydrogen compound and a preparation method thereof, and the preparation method comprises the following steps: taking a borane ammine complex as a solid hydrogen source, tabletting the borane ammine complex and elemental scandium through a mold, and stacking according to'hydrogen source-scandium-hydrogen source '; loading the assembly into a CVD diamond single crystal tube with holes, and carrying out secondary wrapping with NaCl to form a sealed reaction unit; carrying out segmented pressurization / depressurization in a cubic press, electrifying and segmented heating under the condition of 800-1200 DEG C, and carrying out pressure maintaining and cooling to complete synthesis; according to the method, local high hydrogen partial pressure is established under the action of moderate high pressure and double-layer sealing, external introduction of high-pressure hydrogen is avoided, and the equipment complexity and the safety risk are reduced; the product prepared by the invention is hexagonal-phase ScH3, can stably exist at normal temperature and normal pressure, and is different from cubic-phase ScH3 which can only be synthesized under an extreme high-pressure condition and cannot be kept stable after pressure relief, XRD and structure refinement are consistent with the standard, and the process can be repeated and amplified.

The invention relates to a subway tunnel hydrogen energy vehicle high-pressure hydrogen leakage monitoring and hydrogen discharging method. The method comprises the steps that hydrogen sensors are arranged on a subway tunnel ceiling at preset intervals; the hydrogen concentration measured by each hydrogen sensor is obtained, and the hydrogen sensor with the hydrogen concentration larger than or equal to a first preset threshold value is marked as a target hydrogen sensor; determining a tunnel where the target hydrogen sensor is located, marking the tunnel as a leakage tunnel, and determining a tunnel type of the leakage tunnel; hydrogen storage pressure of a high-pressure hydrogen storage tank of the hydrogen energy vehicle is obtained, and corresponding ventilation information is obtained in a preset database according to the tunnel type and the hydrogen storage pressure; and based on the obtained ventilation information, the leakage tunnel is controlled to conduct ventilation in the obtained ventilation mode, and the ventilation wind speed is controlled to be the basic wind speed till the hydrogen concentration is reduced to be below a preset safety threshold value. Hydrogen is effectively prevented from being accumulated on the tunnel vault to form explosive mixed cloud, the explosion risk is greatly reduced, and operation safety of the underground space is guaranteed.

The invention provides an intelligent and safe hydrogen filling process which comprises a high-pressure hydrogen filling column, and the high-pressure hydrogen filling column is provided with a gas inlet pipeline, a gas outlet pipeline, a nitrogen pipeline, an instrument air pipeline, an emptying pipeline and a sampling pipeline; the control system is connected with the high-pressure hydrogen filling column and is used for controlling the opening and closing of valves on the gas inlet pipeline and the 20-52MPa gas outlet pipeline; wherein the control system controls the high-pressure hydrogen filling column to complete 20-52MPa hydrogen filling, metering and automatic interlocking shutdown by controlling the opening and closing of the valve. According to the invention, standardized intelligent operation of hydrogen filling and metering in the hydrogen filling process of two pressure grade intervals of 20-52 MPa is realized, and the overall safety and reliability of hydrogen loading and unloading operation are improved.