142 results about "Hydrogen transport" patented technology

The invention relates to the technical field of hydrogen transportation monitoring, in particular to a real-time monitoring and positioning method and system for hydrogen leakage of a hydrogen transportation trailer, and the method comprises the steps: automatically generating a signal collection request according to a preset real-time monitoring period, and synchronously obtaining a plurality of original sensing signals in real time through a vehicle-mounted sensor array, the method comprises the following steps: respectively preprocessing a plurality of original sensing signals to obtain a plurality of target quantized data, carrying out feature extraction on the plurality of target quantized data to obtain a feature variable set, carrying out fusion decision on the feature variable set by adopting a preset target decision model to generate a fusion decision result, and performing confidence evaluation on the fusion decision result through a probability threshold comparator, generating an early warning signal when a comprehensive score exceeds a dynamic early warning threshold, sending the early warning signal and target sensing data to a remote monitoring platform, and displaying an early warning trigger position and state of the hydrogen transport trailer on the remote monitoring platform. And the hydrogen trailer transportation safety and the emergency treatment efficiency are improved.

The invention discloses a flexible hydrogen transport PE composite pipe. The flexible hydrogen transport PE composite pipe is of a three-layer structure, raw material selection, carbon fiber pretreatment, filler pulping, coating treatment and co-extrusion forming. The method solves the problems that an existing preparation method is uneven in material mixing and poor in pipe size precision. The invention further discloses the flexible hydrogen transport PE composite pipe, the flexible hydrogen transport PE composite pipe is prepared by the preparation method of the flexible hydrogen transport PE composite pipe, and the mechanical property is also improved while the flame-retardant, antistatic and compact properties are improved.

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-doped natural gas experiment method based on a fuel gas micro-grid. The method comprises the following steps: providing hydrogen and natural gas; mixing the provided hydrogen and natural gas; compressing the mixed hydrogen and natural gas in a compression area; the compressed hydrogen and the compressed natural gas are respectively conveyed to an urban hydrogen doping experiment area and a terminal user experiment area; pressurizing the hydrogen-doped natural gas in the low-pressure experimental area to the high-pressure experimental area by using a compressor in the urban hydrogen-doped experimental area; the hydrogen-doped natural gas is used by equipment in a terminal user experiment area, and hydrogen is provided by a pure hydrogen pipeline, a hydrogen cylinder group or a hydrogen long pipe trailer; natural gas is provided by a natural gas pipeline, a CNG tank car or an LNG tank car, according to the overall design method of the natural gas hydrogen doping experiment system, the quality of the natural gas hydrogen doping experiment can be systematically improved from multiple aspects of gas source supply, hydrogen doping gas mixing, hydrogen doping flow, hydrogen doping conveying, hydrogen doping pressurization and terminal users, and the natural gas hydrogen doping experiment system has the advantages of being simple in structure, safe, stable and high in functionality.

The invention discloses a steel plate for a pure hydrogen conveying pipeline and a production method of the steel plate. The steel plate comprises the following components in percentage by weight: 0.021 to 0.076 percent of C, 0.07 to 0.21 percent of Si, 0.66 to 0.93 percent of Mn, 0.12 to 0.3 percent of Cr, less than or equal to 0.24 percent of Ni, less than or equal to 0.24 percent of Cu, 0.014 to 0.052 percent of Nb, 0.014 to 0.050 percent of V, 0.009 to 0.019 percent of Ti, 0.015 to 0.045 percent of Al and the balance of iron. The production method comprises the following steps: the starting / finishing rolling temperature of rough rolling is Tnr-Min (TNbC, TNbN and TTiC), the starting / finishing rolling temperature of finish rolling is Ar3-20 DEG C-Ar3 + 10 DEG C, and the finishing rolling temperature is Ar3-(40-20) DEG C; and carrying out water cooling, putting Ar3-(80-30) DEG C into water, and discharging water from Min (TVC, TVN)-300 DEG C to Min (TVC, TVN) + 5 DEG C.

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 relates to a method for installing a tank in a nacelle for a hydrogen-powered aircraft and an intermediate structure for the installation method. The invention relates to a method for mounting a compartment (2) containing at least a part of the equipment required to deliver dihydros to the engine of an aircraft, referred to as a hydrogen compartment, comprising the step of positioning the hydrogen compartment (2) in the cabin by means of a chassis (4) fixed to the cabin (1) and / or at least one track of the hydrogen compartment (2).

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 provides a leakage monitoring device for a hydrogen conveying composite pipeline, and relates to the field of hydrogen conveying pipes. The hydrogen conveying composite pipeline leakage monitoring device comprises a conveying pipe, a detection mechanism is arranged in the middle of the outer wall of the conveying pipe, the detection mechanism comprises a fixing strip and a cavity, data lines are fixedly connected to the interiors of the front end and the rear end of the fixing strip, a plurality of supporting blocks are fixedly connected to the interior of the cavity, and the supporting blocks are fixedly connected to the interior of the cavity. A first mounting cylinder is fixedly connected to the rear end of the middle of the upper surface of the fixing strip, and a gas sensor is arranged at the upper end in the first mounting cylinder. According to the splicing mechanism of the hydrogen conveying composite pipeline, the splicing pipes and the splicing rings are arranged, under connection of the splicing rings, a user can adjust the number of the conveying pipes between the splicing pipes according to requirements, and therefore the distance between the pipelines needing to be closed and isolated is adjusted; and therefore, the application range and the use convenience of the device are improved.

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.

a method for mounting, in a nacelle for a hydrogen-powered aircraft, a box containing at least part of the equipment necessary for transporting dihydrogen to an engine of the aircraft, called H2 box, the mounting method comprising a step of positioning the H2 box in the nacelle by virtue of at least one rail secured to a chassis of the nacelle, or to the H2 box, or both.

The present invention relates to the technical field of gas permeability testing, and in particular to a method and device for measuring the hydrogen permeation law of non-metal along the thickness direction. The device comprises a first support base, a hydrogen filling tank, a sample, a hydrogen measuring hose, a hydrogen concentration detector, a second support base, a hydrogen filling hole, a pressure relief hole, a detection hole, an exhaust window, and a sealing O-ring. Hydrogen is filled through the hydrogen filling hole on one side of the hydrogen filling tank, and hydrogen permeates along the thickness direction of the sample according to a concentration gradient. After permeating to the detection hole, hydrogen enters the hydrogen concentration detector through the hydrogen measuring hose. The device can be used to measure the hydrogen permeation law of non-metal along the thickness direction, provide experimental support for related hydrogen permeation simulation, and thus provide a basis for the research, development, and selection of non-metallic materials for hydrogen delivery systems.

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.

The invention discloses a characterization method and system for hydrogen embrittlement performance of pipeline steel for hydrogen-doped conveying, and relates to the technical field of hydrogen energy storage and transportation materials, and the characterization method comprises the following steps: respectively placing a plurality of sample groups to be tested in different hydrogen pressures and at the same test temperature; respectively carrying out standard slow tensile tests on the plurality of to-be-tested sample groups to obtain an average stress-strain curve of each to-be-tested sample group under the corresponding hydrogen pressure; based on the average stress-strain curve, respectively calculating the average elongation after fracture, the average yield strength and the average tensile strength of each to-be-tested sample group; the average elongation after fracture, the average yield strength and the average tensile strength are used as parameters for representing the hydrogen embrittlement phenomenon of the pipeline steel for hydrogen-doped conveying, and the hydrogen embrittlement phenomenon of the to-be-tested sample under different hydrogen pressures is represented. The technical problem that the influence of hydrogen on the mechanical property of the material in a low-concentration gaseous hydrogen service environment cannot be reflected due to the fact that a hydrogen supersaturation state easily occurs in the material in the prior art is solved.

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 relates to the technical field of gas power generation, and discloses a gas unit deep peak regulation low-carbon operation method and system.The method comprises the steps that a peak regulation instruction is received, and the peak regulation instruction is compared with the real-time operation load of a gas unit; and when the real-time operation load is larger than the peak regulation instruction, the unit load is kept unchanged, the on-grid electric quantity is output according to the peak regulation instruction, water electrolysis hydrogen production is conducted on the remaining electric quantity of the gas unit, and the prepared hydrogen is conveyed back to the gas unit for hydrogen-doped combustion of the gas unit. After a deep peak regulation instruction of the unit is received, the load of the unit is kept stable, alternating-current and direct-current conversion is carried out on residual electricity under the condition that the power grid electric quantity requirement is met, and generated direct current is used for electrolyzing water to produce hydrogen to ensure that the actual operation of the unit is consistent and unchanged, and the influence of load change on the service life of the unit is avoided; and meanwhile, prepared hydrogen is conveyed back to the gas unit for hydrogen-doped combustion of the gas unit, so that the energy utilization efficiency is improved while carbon emission is reduced.

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.

A management device for a hydrogen transportation system that effectively utilizes surplus electricity from distributed energy sources is provided. [Solution] A management device for a hydrogen transportation system manages a hydrogen transportation system comprising: a hydrogen production device that produces hydrogen using surplus electricity from distributed energy sources; a main hydrogen pipeline that is installed on multiple transmission towers and transports the hydrogen produced by the hydrogen production device; and a hydrogen storage device that stores the hydrogen transported by the main hydrogen pipeline and transports the hydrogen to at least one demand area via a local hydrogen pipeline. The management device also comprises a hydrogen power generation amount detection unit that detects the amount of power generated by a hydrogen gas turbine that has received hydrogen transported by the hydrogen transportation system; and a carbon dioxide emission reduction calculation unit that calculates the carbon dioxide emissions that would be emitted if the power generation were performed by thermal power generation, using the sum of the amount of power generation detected by the hydrogen power generation amount detection unit and the amount of power generation based on the amount of hydrogen transported to the demand area.

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.