99 results about "Hydrogen transport" patented technology

The invention relates to the technical field of airborne fuel cells, in particular to an airborne fuel cell system and a control method. The airborne fuel cell system comprises an electric pile power generation assembly, an air pressurization assembly, a hydrogen conveying assembly and an evaporative cooling assembly. And the air supercharging assembly is communicated with a cathode inlet of the electric pile power generation assembly. And the hydrogen conveying assembly is communicated with an anode inlet of the electric pile power generation assembly. The evaporative cooling assembly comprises a cooling pump, a humidifying unit, a first gas-water separator and a water storage tank, an electrode water drainage and exhaust port of the galvanic pile power generation assembly is communicated with an inlet of the first gas-water separator, and a water outlet of the first gas-water separator is communicated with the water storage tank. An inlet of the cooling pump communicates with the water storage tank, an outlet of the cooling pump communicates with the humidification unit, and the humidification unit communicates with an outlet of the air pressurization assembly. Therefore, the problems that the thermal management scheme of the airborne fuel cell is difficult to cover the whole flight envelope and the working temperature area of the fuel cell is narrow are solved.

The invention relates to a self-repairing hydrogen barrier composite coating for a hydrogen storage or transportation device as well as a preparation method and application of the self-repairing hydrogen barrier composite coating, and belongs to the technical field of hydrogen energy storage and transportation materials. The coating is of a double-layer structure and is composed of a bottom coating and a humidity response microcapsule self-repairing barrier layer. The humidity response microcapsule is composed of a capsule core containing a polyurethane prepolymer and a hybrid capsule shell formed by polyurethane and siloxane, and has good hydrogen barrier performance and environmental response characteristics. In a certain humidity environment, the microcapsule is stimulated to release the capsule core material, and in-situ self-repairing is achieved. The problem that a traditional hydrogen-resistant coating is short of repairing capacity is solved, and the hydrogen-resistant coating has a wide application prospect in the aspect of improving the safety of a hydrogen conveying and storage system.

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 invention relates to the technical field of steel smelting, in particular to a pipeline steel plate for a hydrogen embrittlement-resistant high-pressure pure hydrogen conveying pipeline and a smelting method of the pipeline steel plate. The smelting process comprises the steps of converter smelting, CAS refining, LF refining, RH refining and continuous casting. In LF refining, oxygen is determined after molten steel arrives at a station, silicon iron is added for deoxidation, and the oxygen content of the molten steel is stabilized to be 20-80 ppm; 0.10-0.35 kg of ferrozirconium is added for each ton of steel in the LF refining process, and 0.50-0.80 kg of ferrotitanium is added for each ton of steel after heating is conducted for 5-10 min. Under the equipment condition of a conventional smelting mode, through a special deoxidation mode without adding aluminum, ferrozirconium, ferrotitanium and rare earth alloy materials are added according to a specific process, and the whole process of the smelting process is optimized, so that the purity of molten steel is improved, the morphology of inclusions is improved, absorption and diffusion of hydrogen are inhibited, and a structure refining and hydrogen trap system is stably formed; the prepared pipeline steel plate shows higher hydrogen embrittlement resistance in a high-hydrogen environment, and is particularly suitable for long-term service requirements in high-pressure, variable-load and water-containing hydrogen environments.

The invention discloses an in-situ metallurgical submerged-arc welding method for hydrogen storage / transportation material bypass high-nickel cold wires, and relates to the field of submerged-arc welding. The problem that hydrogen embrittlement and hydrogen induced cracking are prone to occurring in a hydrogen conveying pipe welding joint is solved. The frame body is fixed to a sliding plate of a submerged arc welding gun, the wire feeding wheel set is installed on the frame body and inputs high-nickel cold wires into a stable area of a molten pool in a stepless speed change mode, the Hall sensor detects the wire feeding speed in real time and feeds back speed signals to the servo driver of the wire feeding wheel set, and therefore closed-loop control over the wire feeding speed is achieved. According to the submerged-arc welding method, in the welding process, the bypass high-nickel cold wire is introduced, quantitative regulation and control over the nickel element content in a weld joint and accurate control over heat input of the weld joint are achieved by adjusting the wire feeding speed of the bypass high-nickel cold wire, and then the hydrogen embrittlement resistance of the weld joint is improved. The method is used for hydrogen storage / transportation material welding.

The invention discloses a nonmetal composite hydrogen conveying hose with a multi-form hydrogen blocking layer, and belongs to the technical field of hydrogen conveying hoses, the nonmetal composite hydrogen conveying hose comprises an external pipe, the bottom end of the external pipe is connected with a butt-joint pipe, the bottom end of the butt-joint pipe is connected with a composite hose, the bottom end of the butt-joint pipe is connected with a first sleeve in a penetrating mode, and the top end of the butt-joint pipe is connected with a second sleeve in a penetrating mode; the first sleeve is sleeved on the outer wall of the composite hose, the second sleeve is sleeved on the outer wall of the external pipe, a cavity is arranged in the butt-joint pipe, and a sealing measuring assembly is slidably connected in the cavity of the butt-joint pipe. A complete hydrogen conveying structure is integrally formed by a composite hose, a butt joint pipe and an external pipe, the butt joint pipe is fixedly connected with the composite hose and the external pipe in a sleeving mode through a first sleeve and a second sleeve, an inner cavity provides an installation and sliding space for a test sealing assembly, and the composite hose is of a multi-layer composite structure of a hydrogen conveying pipe, a first hydrogen blocking layer and a second hydrogen blocking layer. And a multi-form hydrogen blocking system with double hydrogen blocking layers and a hydrogen transporting base layer is formed.

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.

The utility model relates to the technical field of mixed hydrogen conveying of natural gas pipelines, in particular to a static mixer for mixing natural gas and hydrogen, which comprises a mixer body, and a plurality of runner grooves are formed in the outer wall of the mixer body along the radial direction; the adjacent runner grooves are communicated through a plurality of runner holes; a plurality of first air inlet holes and second air inlet holes are formed in the mixer body in the radial direction, and the section shapes of the first air inlet holes and the second air inlet holes are different. Wherein the flow channel groove is used for guiding airflow; the runner holes are used for enabling inlet gas to generate a complex flow field; the first gas inlet hole and the second gas inlet hole can enable gas to generate different turbulent flows and disturbances; the static mixer is of an integrated structure and is simple in structure, low in machining cost, free of other movable parts, low in maintenance cost and easy to install. The problems that in the prior art, a static mixer is complex in structure, high in cost and poor in mixing effect are solved.

The application provides a smelting method of L245MH hydrogen conveying pipeline steel, and belongs to the field of steelmaking. The method comprises the following steps: performing KR pretreatment on molten iron, then performing twice deslagging treatment to obtain desulfurized molten iron; performing double-slag converter smelting on the desulfurized molten iron to obtain first molten steel; performing converter tapping on the first molten steel, and adding premelted slag into the molten steel to perform slag washing desulfurization treatment, thereby obtaining second molten steel; adding Al-Fe deoxidizer to the slag surface of the second molten steel, and controlling the ladle slag layer thickness of the second molten steel, thereby obtaining third molten steel; performing LF deep desulfurization refining on the third molten steel to obtain fourth molten steel; performing RH refining on the fourth molten steel, and controlling the circulating time after the last batch of materials is added, thereby obtaining fifth molten steel with a set Mn / Si mass ratio; using high-alkalinity tundish covering agent to cast the fifth molten steel, thereby obtaining a casting billet for L245MH hydrogen conveying pipeline steel. The content of S, P elements and inclusions in the steel is controlled.

The invention discloses a pure steel smelting method for pure hydrogen conveying pipeline steel L245M. The adopted smelting process route comprises the steps of blast furnace-KR desulfurization-converter-LF refining-RH vacuum treatment-slab continuous casting. The pure hydrogen conveying pipeline steel L245M comprises the following chemical components in percentage by mass: 0.04 to 0.06 percent of C, 0.08 to 0.15 percent of Si, 0.90 to 1.15 percent of Mn, less than or equal to 0.013 percent of P, less than or equal to 0.0010 percent of S, 0.025 to 0.045 percent of Alt, 0.008 to 0.015 percent of Nb, less than or equal to 20ppm of O, less than or equal to 50ppm of N, less than or equal to 1.5 ppm of H and the balance of iron and inevitable impurities. The invention aims to meet the requirements of ultra-low S and P control and ultra-purity inclusion control of pure hydrogen conveying pipeline steel.

The present application relates to a kind of liquid hydrogen transport, mobile hydrogenation and transfer injection tank truck, including liquid hydrogen tank truck and being arranged in the exhaust path, self-boosting circuit, liquid hydrogen filling path and liquid hydrogen delivery path of the liquid hydrogen tank truck, the liquid hydrogen transport, mobile hydrogenation and transfer injection tank truck can make up the reality of the deficiency of current liquid hydrogen hydrogenation station, liquid hydrogen transport, mobile liquid hydrogen filling, tank truck between transfer injection can be carried out, liquid hydrogen hydrogenation station fluctuation liquid hydrogen demand can also be coped with, also can be used as mobile liquid hydrogen hydrogenation station, satisfy the demand of multiple situations when liquid hydrogen transport, the cold energy of the evaporative cold hydrogen gas generated in the process can also be recovered by the liquid hydrogen transport, mobile hydrogenation and transfer injection tank truck, reduce resource waste.

This invention relates to the field of airborne fuel cell technology, specifically to an airborne fuel cell system and control method. The airborne fuel cell system includes a fuel cell stack generator assembly, an air pressurization assembly, a hydrogen transport assembly, and an evaporative cooling assembly. The air pressurization assembly is connected to the cathode inlet of the fuel cell stack generator assembly. The hydrogen transport assembly is connected to the anode inlet of the fuel cell stack generator assembly. The evaporative cooling assembly includes a cooling pump, a humidification unit, a first gas-water separator, and a water tank. The electrode drain outlet of the fuel cell stack generator assembly is connected to the inlet of the first gas-water separator, and the outlet of the first gas-water separator is connected to the water tank. The inlet of the cooling pump is connected to the water tank, the outlet of the cooling pump is connected to the humidification unit, and the humidification unit is connected to the outlet of the air pressurization assembly. This solves the problem that airborne fuel cell thermal management schemes are difficult to cover the entire flight envelope and that the fuel cell operating temperature range is narrow.

The application discloses a cutting device and a cutting method for hydrogen conveying steel pipes, and the cutting device comprises a rack, a positioning and clamping mechanism, a sealing and protection structure, a cutting mechanism and a control module, the rack comprises a rack body; the positioning and clamping mechanism is arranged on the left and right sides of the rack body and is used for positioning and clamping the hydrogen conveying steel pipe; and the sealing and protection structure comprises a sealing cabin body and a gas supply system. The application constructs a physical isolation type closed operation cabin formed by an annular shell and a self-adaptive sealing bag, fills inert gas into the cabin before cutting and during the whole cutting process, actively replaces and maintains an oxygen-free and low-hydrogen-concentration environment, eliminates the coexistence of high temperature and flammable hydrogen from the root, and makes the cutting operation absolutely safe even in the extreme case that residual hydrogen exists in the pipeline, so that the core safety hidden danger that cannot be overcome by the traditional hot cutting technology is solved.

The invention belongs to the technical field of hydrogen energy system planning, and particularly relates to a river water path hydrogen chain sequential collaborative planning method considering operation efficiency dynamic attenuation. Comprising the following steps: quantitatively analyzing working efficiency degradation characteristics of hydrogen production equipment, a hydrogen transport ship, a hydrogen storage station and a hydrogen fuel cell hydrogen energy unit to construct a river water path hydrogen chain multi-time scale time sequence operation model; on the basis, considering the power support constraint of a watershed power system, and providing a river water path hydrogen chain sequential planning model; a McCormick relaxation technology is introduced to process nonlinear constraints, and a programming model is converted into a classical mixed integer linear programming problem. The invention belongs to the technical field of hydrogen energy system planning, and particularly relates to a river water path hydrogen chain sequential collaborative planning method considering operation efficiency dynamic attenuation.

The invention discloses a production and smelting method of a Phi390mm L415QH round tube blank for pure hydrogen conveying, and belongs to the technical field of metallurgy. The production process comprises a molten iron pretreatment process, a converter smelting production process, an LF refining production process, a VD vacuum degassing production process and a round billet continuous casting production process. The pipe blank comprises the following chemical components in percentage by mass: 0.05-0.07% of C; 0.25 to 0.35 percent of Si; 1.20% to 1.35% of Mn; 0.18 to 0.28 percent of Cr; 0.10 to 0.15% of Mo; 0.02 to 0.04 percent of V; less than or equal to 0.015% of P; s < = 0.003%; 0.01 to 0.02 percent of Ti; and 0.0010-0.0020% of RE, and the balance of iron and impurities. The round tube blank produced by the method meets the requirements of macroscopic and non-metallic inclusions of materials and the gas content in steel, and meanwhile, the production efficiency is high, and the metal consumption is low.

This invention relates to the field of metal hydride hydrogen storage materials, and particularly to a metal hydride hydrogen storage material, its preparation method, and its applications. The method includes the following steps: First, using metal hydride and metallocene as starting materials; second, ball milling the materials in an Ar glove box; third, ball milling in a ball mill jar filled with a hydrogen atmosphere or an inert atmosphere. This invention provides a method for controlling the thermodynamics of metal hydrides. This method is simple, exhibits lower thermodynamic stability and better kinetic performance, making it promising for future applications. It allows control of the thickness of the surface coating layer, enabling thermodynamic / kinetic regulation of hydrogen absorption and desorption without affecting hydrogen transport. The preparation method is simple, requiring only high-energy ball milling to obtain the product. It effectively improves the hydrogen absorption / desorption performance of metal hydride materials and enables the development of a high-performance metal hydride hydrogen storage system, which can be widely applied in hydrogen fuel cell vehicles, hydrogen refueling stations, hydrogen purification and separation, and other fields.

This invention relates to a multilayer structure for storing or transporting hydrogen-containing gases, wherein the multilayer structure comprises at least three layers, including an inner layer comprising at least one first polymer, an intermediate layer comprising an ethylene-vinyl alcohol copolymer, and an outer layer comprising at least one second polymer, wherein the water vapor permeability of the inner layer is lower than that of the outer layer. The multilayer structure exhibits excellent hydrogen barrier properties. Therefore, the multilayer structure is suitable for use in hydrogen storage containers and hydrogen transport pipelines.

The invention discloses a hot rolling production method of low-cost pure hydrogen conveying pipeline steel L245MH. The hot rolling production method comprises the following steps: designing low carbon, niobium and titanium as alloy components; the adopted L245MH comprises the following components in percentage by weight: 0.04 to 0.06 percent of C, 0.10 to 0.15 percent of S i, 0.90 to 1.00 percent of Mn, 0.008 to 0.015 percent of Nb, 0.005 to 0.015 percent of Ti, 0.025 to 0.050 percent of Alt and the balance of Fe and other inevitable impurities, wherein P is less than or equal to 0.012 percent, S is less than or equal to 0.0015 percent, O is less than or equal to 0.0020 percent, N is less than or equal to 0.0050 percent, and H is less than or equal to 0.0002 percent; and main process parameters are limited. The invention aims to improve the comprehensive performance of the finished strip steel and the pure hydrogen conveying service performance while meeting the requirements of customers on the performance of hot-rolled coil plates.

The invention discloses a hot rolling production method of low-cost pure hydrogen delivery pipeline steel L360MH, which adopts a low-carbon equivalent design to remarkably improve weldability and hydrogen embrittlement resistance. Ti / Nb composite microalloying refined grains are added, so that a high-density nanoscale carbonitride precipitated phase is formed and effectively serves as a'hydrogen trap ', and hydrogen diffusion is inhibited; meanwhile, the content of P (smaller than or equal to 0.013%) and the content of S (smaller than or equal to 0.0015%) are strictly controlled, impurity segregation is reduced, and hydrogen induced cracking (HIC) sensitivity is reduced; through a controlled rolling and controlled cooling (TMCP) process, fine and uniform ferrite and a small amount of pearlite structures (the grain size of the ferrite is greater than or equal to 9 grades) are obtained; a high-proportion small-angle grain boundary and a uniform precipitated phase hinder crack propagation, so that the steel is endowed with excellent low-temperature toughness (the impact energy at-10 DEG C is more than or equal to 200J) and high hydrogen embrittlement resistance; and the structure uniformity also guarantees the strength stability (the yield strength is greater than or equal to 390MPa), and the mechanical requirements of pure hydrogen transportation are met.

The invention discloses a preparation method of a submerged-arc welding wire for a pure hydrogen conveying pipeline and a submerged-arc welding method of the pure hydrogen conveying pipeline. In the preparation method of the welding wire, molten steel comprises the following chemical components: less than or equal to 0.05% of C, 0.05-0.20% of Si, 0.70-0.90% of Mn, 0.10-0.20% of Cr, 0.10-0.20% of Ni + Mo, 0.01-0.10% of Ti, 0.01-0.10% of Nb, less than or equal to 0.10% of Cu, less than or equal to 0.005% of P, less than or equal to 0.005% of S and the balance of Fe and impurities; in the steel billet forging process, a steel ingot is heated to 1150-1200 DEG C and then subjected to heat preservation, the heat preservation time is larger than or equal to 1 h, then forging is conducted, and a small square billet is obtained and cooled to the room temperature; in the rolling process, the heating temperature is 1050-1100 DEG C, the temperature of a finish rolling inlet is 890-920 DEG C, and the spinning temperature is 850-890 DEG C.

The utility model relates to the technical field of air pressure detection, in particular to a hydrogen production conveying pipeline long-term service air pressure detection device which comprises a device shell, an air pressure meter is arranged on the surface of the device shell, connecting pipes are fixedly connected to the two sides of the device shell, flange plates are fixedly connected to the surfaces of the connecting pipes, and a fixing cover is fixedly connected to the surface of the device shell. The surface of the fixed cover is fixedly connected with a glass plate, the surface of the fixed cover is fixedly connected with a sliding rod, and the outer surface of the sliding rod is sleeved with a movable cover. Under the action of the fixed cover and the movable cover, the barometer is protected, damage to normal use of the barometer caused by external factors is reduced, the service life of the barometer is prolonged, the effect of the barometer is improved, the connecting cover is connected with the sealing sleeve, abutting sealing operation can be conducted on the connecting position of the flange plate under the action of the sealing sleeve, and the sealing effect is improved. The connection and use sealing performance of the flange plate is improved, and the installation sealing performance of the air pressure detector is further improved.

The invention belongs to the technical field of hydrogen storage / hydrogen transport materials, and particularly relates to a magnesium-based composite hydrogen storage / hydrogen transport material and a preparation method thereof. The material comprises a steel plate base material, wherein an aluminum alloy and a magnesium-based alloy are deposited on the two sides of the steel plate base material respectively; the magnesium-based alloy is Mg2Ni1-x-yMnxCry alloy, x is greater than or equal to 25% and less than or equal to 35%, and y is greater than or equal to 15% and less than or equal to 25%. The Mg2Ni powder is doped with Cr and Mn elements to form the Mg2Ni (1-x-y) MnxCry alloy, so that part of Ni elements are replaced, the dehydrogenation activation energy of the alloy is reduced in the aspects of thermodynamics and dynamics, the dehydrogenation absorption rate of the alloy is improved, and the dehydrogenation absorption thermodynamics and dynamics performance is optimized.

A metal coating is electrodeposited onto an inner surface of a pipe wall by conveying a pig along the pipe and driving a current through an electrolyte fluid body extending from an electrode of the pig to the pipe wall. In order to deposit an internal coating of copper, the pig supports the copper anode and the electrolyte fluid is copper sulfate. The electrodeposition process may be performed in situ on a steel pipe after the pipe has delivered hydrocarbons, and may deliver hydrogen along the pipe after the pipe. The internal coating mitigates the risk of hydrogen atoms migrating into the tube wall and thereby causing steel embrittlement.

The invention relates to a hydrogen transport optimization method for reducing the operating cost of a high-proportion clean energy system, and belongs to the technical field of electricity-hydrogen cooperation of clean energy. The method comprises the steps of obtaining influence parameters of each weather scene on output of each energy main body of a power grid based on historical weather data; constructing a lower-layer objective function by taking the minimum wind and light abandoning rate in each weather scene as an objective, and constructing power grid operation constraints in each weather scene based on the influence parameters; constructing an upper objective function by taking the minimum total expected operation cost of the system as an objective, and constructing an electrical load demand constraint, a hydrogen load demand constraint and an infrastructure capacity constraint in each weather scene based on the influence parameters; and performing iterative solution on the upper-layer model and the lower-layer model based on the constraints, the hydrogen transport mode ratio constraint and the hydrogen production amount constraint to obtain the hydrogen transport mode ratio and the power grid energy main body output in each weather scene. According to the method, the hydrogen energy application efficiency is improved, and the operation cost of the clean energy system is reduced.

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 present application relates to a kind of experimental apparatus and its test method for measuring gaseous or gas-liquid mixed state high-pressure hydrogen permeation behavior, wherein the experimental apparatus for measuring gaseous or gas-liquid mixed state high-pressure hydrogen permeation behavior includes autoclave, collet joint, pressure reducing valve, exhaust valve, high-pressure hydrogen cylinder, autoclave and electrolytic cell connecting device, electrolytic cell, experimental electrode, electrochemical workstation and strain gauge tester;Two threaded through holes are arranged in the middle position of the cover of the autoclave on the upper side, and the two threaded through holes are respectively connected with collet joint, collet joint connects conduit, two conduits are respectively connected with pressure reducing valve and exhaust valve, and the pressure reducing valve is connected with high-pressure cylinder by another conduit;Round channel is arranged in the middle of autoclave body, and the present application can change gas component, gas partial pressure, gas-liquid mixing and the like conditions, to provide corresponding experimental technical support for the selection of natural gas hydrogen blending pipeline pipe material, process design and safety management.

The utility model relates to the technical field of pipelines, and discloses a reinforced thermoplastic plastic composite pipe for hydrogen delivery, which comprises two outer protective layers, reinforcing layers are fixedly connected to the tops of the inner walls of the two outer protective layers, and lining layers are fixedly connected to the tops of the inner walls of the two reinforcing layers. Micro pressure sensors are fixedly connected to the outer surfaces of the two reinforcing layers, connecting hoops are arranged on the outer surfaces of the two outer protection layers, and bolts are in threaded connection to the tops of the two connecting hoops. According to the utility model, the micro pressure sensor is arranged on the outer surface of the enhancement layer, the micro pressure sensor wraps the enhancement layer in a circular ring shape, and the gas sensor is arranged at the bottom of the outer protection layer, so that when the pipeline is damaged, the internal air pressure is changed or when the gas sensor monitors hydrogen, feedback is carried out; the problem that the sealing degree of the pipeline cannot be monitored in the hydrogen transportation process is solved.

The utility model provides a kind of hydrogen refrigeration system and gas hydrogen long tube trailer.The hydrogen refrigeration system is used to load in hydrogen transport vehicle.The pipeline system is arranged to transport low-temperature liquid stored in liquid storage tank to heat exchanger, and fan is arranged in the pipeline system to send air into the compartment of hydrogen transport vehicle after being transported to heat exchanger, whereby, low-temperature liquid obtains heat in heat exchanger and evaporates, while air obtains cold in heat exchanger and cools down, thereby cooling hydrogen storage placed in the compartment.The above-mentioned hydrogen refrigeration system can effectively avoid the temperature of the compartment of hydrogen transport vehicle being too high without excessive weight gain.

Provided is a high-strength steel plate for hydrogen transport steel pipes that has excellent fatigue crack propagation resistance, little deterioration in strength and elongation, excellent low-cycle fatigue properties, and excellent resistance to ground movement in a high-pressure hydrogen environment. The present invention provides a steel sheet having a predetermined component composition and a tensile strength (TS) in air. A ) and tensile strength in hydrogen gas environment (TS H ) is 535 MPa or more, and the tensile strength in air (TS A ) and tensile strength in hydrogen gas environment, elongation in air (EL A ) and elongation in hydrogen gas environment (EL H ), the yield ratio (YR), which is the ratio of the yield strength to the tensile strength of the steel plate in air and hydrogen gas environments, the minimum grain size of the top 20% of the largest grains at the center of the plate thickness, the number of repeated fractures in a low-cycle fatigue test with a strain amplitude of 3%, and the stress intensity factor range ΔK are all within specified ranges.

The present invention relates to compositions (mixtures) of organic hydrogen-carrying liquids (OHCLs), as well as the corresponding mixture(s) of OHCLs / dehydrogenated OHCLs. The invention also relates to their use for hydrogen transport and storage, and to hydrogen generation processes using them.