530 results about "Hydrogen combustion" patented technology

To provide a system, a method, and an application for carbon recovery system for compact type vessel based on connection between methanol reforming and high-efficiency membrane separation.SOLUTION: Propulsive power is supplied to a vessel by using a methanol aqueous solution as a raw material through steps such as reforming, separation of a reformate product, and hydrogen combustion, hydrogen fuel is manufactured through methanol steam reforming, anxiety about safety of high pressure hydrogen storage in a prior art is eliminated, efficient carbon recovery is carried out by storing separated carbon dioxide by compression and liquefying, heat is supplied for methanol steam reforming and preheating of the fuel by using excess heat of discharged flue gas, and comprehensive use of energy is achieved. Use of hydrogen energy is realized by a vessel without requiring storage and transportation of hydrogen, and a shipping industry contributes to green, low carbon, and sustainable development.SELECTED DRAWING: Figure 1

The invention discloses a natural gas hydrogen-doped combustion optimization method and system for a gas turbine, and the method comprises the steps: obtaining combustion state parameters of a mixed fuel under different mixing proportions under an experimental condition, the combustion state parameters comprising combustion characteristic data and emission characteristic data; establishing a numerical calculation model for describing the combustion process and emission characteristics of the mixed fuel on the basis of combustion science and fluid mechanics, and performing numerical simulation on the mixed fuel in different mixing proportions by adopting the numerical calculation model to obtain combustion state parameters of the mixed fuel; comparing and analyzing the combustion state parameters obtained by the experiment and the combustion state parameters obtained by the numerical simulation, and optimizing the numerical calculation model according to the analysis result; expanding the mixing proportion of the mixed fuel, and performing numerical simulation on the expanded mixed fuel by adopting the optimized numerical calculation model to obtain combustion state parameters of the mixed fuel and construct a training data set; and adopting the training data set to train the machine learning model, and adopting the trained machine learning model to predict the mixing proportion of the mixed fuel. According to the method, by updating a numerical calculation model and a machine learning model, optimal prediction under different fuel and combustion conditions can be realized.

The invention relates to the technical field of gas turbine engines, and discloses a concentric circle type pure hydrogen combustion micro-mixing combustion chamber head which is characterized in that a combustion bowl is arranged on a secondary hydrogen fuel nozzle, secondary hydrogen fuel realizes stable combustion of hydrogen in a low-working-condition central area on the downstream of the combustion bowl, and a stable low-speed central backflow area is formed on the leeside of the combustion bowl; and the central backflow area ensures good combustion stability of the secondary stage. Main-stage hydrogen fuel sprayed out of the inner ring radial spraying holes and the outer ring radial spraying holes is micro-premixed with incoming flow air, the effect of improving the mixing quality and spatial distribution uniformity of the hydrogen fuel in the premixing process is achieved, and the problem of backfire during combustion of the main-stage hydrogen fuel can be avoided; and meanwhile, a low-speed and relatively-large-scale large annular backflow vortex structure is formed on the leeward side of the V-shaped ring, stable combustion is carried out in the large annular backflow vortex, and therefore the stability and uniformity of main-stage hydrogen combustion are improved, and NOx emission is reduced.

The invention provides a comprehensive energy system optimization scheduling method considering biogas reforming hydrogen production and fuel gas hydrogen doping. The method comprises the steps that S1, a comprehensive energy system structure containing biogas reforming hydrogen production and fuel gas hydrogen doping is established; s2, establishing a methane reforming hydrogen production, hydrogen-doped gas turbine and stepped carbon transaction model; s3, establishing an optimal scheduling model of the comprehensive energy system containing methane reforming hydrogen production; s4, wind and light output, load and time-sharing electricity price data of the system are obtained; and S5, solving the scheduling model in the step S3, verifying the economical efficiency and low-carbon property of the methane reforming hydrogen production method, and analyzing the benefits of hydrogen-doped combustion. And multi-element production of hydrogen energy is realized. A green route for converting biomass energy into hydrogen energy is provided, and through comparative analysis of a hydrogen production energy source and a hydrogen production scheme, external gas purchase is reduced, and the carbon emission of converting biomass into heat energy is reduced. And multi-element utilization of hydrogen energy is realized. And absorption of wind and light new energy is promoted. And a stepped carbon transaction mechanism is introduced.

The invention belongs to the field of flexible peak regulation and carbon reduction of thermal power generating units, and discloses a power station boiler oxygen-enriched hydrogen-ammonia-doped system and a working method thereof.The power station boiler oxygen-enriched hydrogen-ammonia-doped system comprises a boiler, and two combustors on the lower portion of the boiler are micro-hydrogen combustors; a combustion outlet of the micro-hydrogen combustor is connected with a lower hearth of the boiler, the hydrogen main gun is obliquely inserted into the inner side of a pulverized coal air chamber of the micro-hydrogen combustor, the hydrogen ignition gun is located in the middle of the pulverized coal air chamber of the micro-hydrogen combustor, and the hydrogen main gun and the hydrogen ignition gun are both connected with the hydrogen supply system. The boiler is provided with secondary air nozzles above and below each burner, the secondary air nozzle below the lowermost micro-hydrogen burner is arranged as a lower secondary air nozzle, the secondary air nozzle above the lowermost micro-hydrogen burner is arranged as an ammonia-doped secondary air nozzle, and the secondary air nozzle below the lowermost micro-hydrogen burner is arranged as an ammonia-doped secondary air nozzle. The secondary air nozzles above and below the uppermost micro-hydrogen burner are ammonia-doped secondary air nozzles, and ammonia gas inlets of the ammonia-doped secondary air nozzles are connected with an ammonia supply system. The problem of unstable combustion under low load can be solved by combining hydrogen-doped ammonia combustion and air oxygen-enriched combustion supporting.

The embodiment of the invention provides a flue gas circulation hydrogen-doped combustion peak regulation and combustion stabilization system. The flue gas circulation hydrogen-doped combustion peak regulation and combustion stabilization system comprises a boiler, a water electrolysis device, a flue gas-hydrogen mixer and a flue gas-hydrogen combustor. The boiler is provided with a burner, and the flue gas-hydrogen burner is arranged on the lowermost layer of the boiler; the water electrolysis device is powered by the power supply device, an anode outlet of the water electrolysis device is communicated with a combustion improver inlet of the combustor, and a cathode outlet of the water electrolysis device is communicated with a hydrogen inlet of the flue gas-hydrogen mixer; a flue gas outlet of the boiler is respectively communicated with an inlet of the chimney and a flue gas inlet of the flue gas-hydrogen mixer; and a mixing outlet of the flue gas-hydrogen mixer is communicated with an inlet of the flue gas-hydrogen burner. According to the system, through hydrogen-doped combustion and oxygen-enriched combustion, boiler combustion is stable and safe during deep peak regulation of a unit, coal consumption is reduced, and cost is saved.

The invention provides a hydrogen combustion device and system, belongs to the technical field of combustors, and aims at solving the problem that high-concentration oxynitride is generated due to the fact that the combustion flame temperature of an existing hydrogen combustion device is high. The device comprises a burner shell, a burner cover and a burner cover, a cavity is formed in the burner shell, the burner shell is connected with a boiler body, and the cavity is communicated with a hearth in the boiler body; the combustor shell is connected with a hydrogen header pipe, a flue gas header pipe and an air header pipe; a pre-combustion assembly and a post-combustion assembly; the pre-combustion assembly is used for spraying hydrogen and air into the hearth and mixing the hydrogen and the air to form first mixed gas; the rear combustion assembly is used for spraying hydrogen, flue gas and air into the hearth and mixing the hydrogen, the flue gas and the air to form second mixed gas; the first combustion assembly comprises an ignition part, the ignition part is used for igniting the first mixed gas, and the ignited first mixed gas is used for igniting the second mixed gas.

The invention provides a multi-mode split hybrid propulsion system of a compact high-temperature fuel cell jet engine. The problems that a traditional aviation gas turbine engine is low in heat efficiency, high in oil consumption rate and high in nitrogen oxide emission amount are solved. The device comprises a propelling system, a transmission system and a lubricating system, the propelling system adopts parallel double shafts; the two connecting shafts can transmit power through a transmission system, so that two working modes of the ducted fan are realized; and the lubricating system feeds lubricating oil to all shaft systems on the shaft. The high-temperature solid oxide fuel cell system supplies power to the motor through the direct current conversion device, then the motor drives the ducted fan, and the total efficiency and the total thrust of the hybrid propulsion system are improved. The hydrogen-rich combustion chamber and the hydrogen-poor combustion chamber are additionally arranged on the structure, so that the problem that the high-temperature solid oxide fuel cell needs a heat exchanger with a complex pipeline to preheat fuel is solved.

The invention relates to the technical field of mixed combustion of hydrogen, and discloses a coal-fired and hydrogen mixed combustion boiler system and a combustion method for mixed combustion of hydrogen in a coal-fired boiler, the coal-fired and hydrogen mixed combustion boiler system comprises a boiler body, a pulverized coal combustion unit, a hydrogen combustion unit, a first air pipe assembly and a second air pipe assembly; a main combustion area is arranged in the boiler body; the pulverized coal combustion unit comprises a first combustion assembly, one end of the first combustion assembly is connected with the main combustion area, and the two ends of the first combustion assembly are connected with a first air pipe assembly and a second air pipe assembly correspondingly. The hydrogen combustion unit is arranged below the pulverized coal combustion unit and comprises a hydrogen pipeline, a mixing chamber and a second combustion assembly, one end of the second combustion assembly is connected with the main combustion area, the other end of the second combustion assembly is connected with the mixing chamber, and the two ends of the mixing chamber are connected with the hydrogen pipeline and the second air pipe assembly respectively.

The invention provides a hydrogen-ammonia mixed low-nitrogen combustor, and belongs to the technical field of combustors. The technical problem of gas combustion with hydrogen and ammonia serving as fuel at present is solved, and the problems that due to the fact that the ammonia combustion reaction activity is poor, the hydrogen combustion speed is high, a nozzle is burnt by tempering, and the NOx emission concentration is high are solved. The device comprises a hydrogen introduction pipe, an ammonia gas introduction pipe, a fuel gas mixer, an annular header, ammonia gas branch pipes and ammonia gas nozzles. The hydrogen introducing pipe comprises a central hydrogen pipe and a combustion-supporting hydrogen pipe, the outlet end of the central hydrogen pipe is located in the annular collecting box, the input end of the combustion-supporting hydrogen pipe is connected with the central hydrogen pipe, the output end of the combustion-supporting hydrogen pipe is connected with the fuel gas mixer, and the output end of the ammonia introducing pipe is connected with the fuel gas mixer; the output end of the gas mixer is connected with an annular header, the annular header is connected with a plurality of ammonia branch pipes, the ammonia branch pipes are annularly arranged, and ammonia nozzles are arranged at the outlet ends of the ammonia branch pipes. The device is mainly used for hydrogen-ammonia mixed combustion.

The invention discloses a hydrogen combustion tempering monitoring system and method based on multi-modal data fusion, and relates to the technical field of combustion monitoring and diagnosis. The data acquisition module is used for acquiring physical parameters and image data in the hydrogen combustion process; the data preprocessing module preprocesses the physical parameters and the image data; the feature extraction module extracts features from the preprocessed physical parameters and image data; the multi-modal feature fusion module splices the extracted features to form a joint feature vector and performs dimension reduction; the tempering state judgment module is used for constructing a tempering state judgment model, outputting a tempering state occurrence probability value and judging a combustion state according to a set safety threshold value; and the sound-light alarm module selects to give an alarm based on the result. Multi-modal features are extracted based on physical parameters and image data and fused to form a joint feature vector, a tempering state discrimination model is constructed according to a random forest algorithm, a sound-light alarm module can be triggered in real time in combination with a set safety threshold, and real-time and accurate discrimination of a tempering phenomenon is realized.

The invention relates to waste heat recovery equipment and a natural gas hydrogen-doped combustion system. The waste heat recovery equipment comprises a first heat exchanger, a second heat exchanger and a spray tower, the first heat exchanger is provided with a first heat absorption side and a first heat release side, an outlet of the first heat absorption side is communicated with a combustion-supporting gas inlet of the combustor, the second heat exchanger is provided with a second heat absorption side and a second heat release side, and an inlet of the second heat release side is connected with a high-temperature flue gas outlet of the combustor. The spray tower is provided with a cooling water inlet, a smoke inlet, a smoke outlet and a spray water outlet, the smoke inlet is communicated with the outlet of the second heat release side, the spray water outlet is communicated with the inlet of the second heat absorption side, and the outlet of the second heat absorption side is communicated with the inlet of the first heat release side. According to the waste heat recovery equipment, two-stage waste heat recovery of high-temperature flue gas is achieved, the waste heat recovery efficiency is remarkably improved, combustion-supporting gas can be heated, accordingly, other combustion efficiency is improved, natural gas consumption and carbon emission are reduced, and the requirements for energy conservation and carbon reduction in the industrial high-temperature combustion process are met.

The invention belongs to the field of boiler waste heat utilization, and particularly discloses an alcohol-hydrogen fuel mixed combustion system utilizing boiler waste heat, which comprises a methanol cracker unit, a methanol supply unit, a methanol cracked gas supply unit, an alcohol-hydrogen burner unit and a smoke exhaust steam supply unit, the methanol cracker unit comprises a methanol cracker, a methanol inlet pipe, a cracked gas outlet pipe, a smoke exhaust inlet flange, a smoke exhaust outlet flange, a methanol shell side area and a smoke exhaust pipe side area, a plurality of heat exchange pipes are uniformly distributed in the smoke exhaust pipe side area, and the methanol inlet pipe is used for connecting the methanol supply unit and the methanol shell side area; the exhaust smoke inlet flange is used for connecting the methanol cracker unit and the exhaust smoke steam supply unit, and the methanol supply unit and the methanol cracked gas supply unit are both used for connecting the methanol hydrogen burner unit and the methanol cracker unit. By means of the self-designed methanol cracker combustion loop, liquid methanol and methanol cracking gas can be combusted at the same time, and the energy utilization rate is greatly increased.

The invention relates to the technical field of comprehensive energy systems, provides a multi-element hybrid energy storage system combined with hydrogen-doped combustion and a capacity configuration optimization method thereof, and establishes a distributed energy system containing ground source heat pump hydrogen-doped combustion based on the existing annual illumination intensity and wind speed data which are clustered into typical days through a K-means algorithm. The load module is used for providing power, heat supply and refrigeration loads for users; two targets of economy and carbon emission are selected, comprehensive constraint conditions are configured, the carbon emission is converted into a part of an economy target function, and the capacity of each link is configured to enable the economy to be optimal; and determining a global optimal configuration scheme according to the optimal configuration scheme by adopting an integer linear programming method. The system can solve the problems that in the prior art, a reasonable energy storage system optimization configuration scheme is lacked, and the economical efficiency and environmental protection performance of the system are not facilitated, fuel is saved, renewable energy sources are fully utilized, and flexible conversion and stable output between electricity and heat or cold and hydrogen are achieved.

According to the hydrogen burner, the three pipe bodies are sequentially arranged from inside to outside in a sleeving mode to form the rotational flow combustion-supporting air channel, the second gas channel and the direct flow combustion-supporting air channel, the three diffusion barrels are connected to the ends of the three pipe bodies correspondingly, and the axial lengths of outlets of the three diffusion barrels are sequentially increased from inside to outside. And a hydrogen spray pipe and an ignition gun are arranged in the innermost pipe body. In the working process, hydrogen of the hydrogen spray pipe is mixed with rotational flow combustion-supporting gas of the rotational flow combustion-supporting air channel, and the mixture is ignited by the ignition gun. And the ignited high-temperature gas in the diffusion cylinder is in a high-speed rotating state and entrains the hydrogen and ammonia gas in the second gas channel for mixing. And then the gas is mixed with direct-current combustion-supporting gas of the direct-current combustion-supporting air According to the hydrogen burner, rotational flow and direct flow combustion-supporting gas is mixed in a staged mode and burnt in a staged and staged mode, ammonia gas is used as gas for adjusting hydrogen combustion activity, the hydrogen combustion speed is slowed down, the flame length is increased, and safe and stable combustion is facilitated. The invention further provides a hydrogen-doped combustion system of the coal-fired unit.

The utility model discloses a hydrogen-doped combustion device in the technical field of combustion equipment. The hydrogen-doped combustion device comprises a gas transmission unit and a control unit, the gas transmission unit comprises a mounting disc and a shell, a gas outlet is formed in the surface of the mounting disc, a gas pipe communicated with the gas outlet is arranged on the side wall of the mounting disc, the shell is arranged on the other surface of the mounting disc and communicated with the gas outlet, and a gas inlet is formed in the shell; a blocking piece used for blocking the shell and an outlet of the second hydrogen pipe is arranged on an outlet of the shell, and an unlocking assembly is arranged in the communication area of the installation disc and the gas pipe and used for unlocking the blocking piece when being impacted by gas. The shell and the outlet of the second hydrogen pipe are blocked through the blocking piece, hydrogen cannot enter the gas outlet when fuel gas does not enter the channel and does not push the baffle to rotate, it is ensured that hydrogen starts to be introduced only when enough fuel gas needs to enter the gas outlet, and safety is improved.

The invention relates to a hydrogen supplement combustion control system and method in a gas turbine waste heat boiler, and according to the system, a gas supply device comprises a natural gas supply module and a hydrogen supply module, and the natural gas supply module and the hydrogen supply module convey natural gas and hydrogen to a combustion device. The combustion device comprises a natural gas combustion module used for combusting natural gas and a hydrogen combustion module used for combusting hydrogen. The control device comprises a natural gas and hydrogen cooperation module and a gas turbine afterburning cooperation module. The calculation module is used for calculating working condition parameters of the gas turbine after hydrogen supplementation, the natural gas and hydrogen cooperation module is used for determining the afterburning proportion of natural gas and hydrogen according to the working condition parameters of the gas turbine, and the gas turbine afterburning cooperation module is used for controlling output of the natural gas and the hydrogen according to load changes of the gas turbine and a power grid dispatching instruction. The problem that in the prior art, a hydrogen supplement combustion control system is low in energy utilization efficiency is solved. And safe and efficient hydrogen supplement combustion is realized.

The utility model discloses a comprehensive utilization system for tablet vanadium calcining flue gas, which is characterized in that a first regulating valve is arranged on a flue gas pipeline between a chimney I and an induced draft fan I, a calcining flue gas return main pipe is arranged on the flue gas pipeline, and the calcining flue gas return main pipe is divided into four branch pipes. According to the comprehensive utilization system, the tablet vanadium three-step method calcination flue gas is led back to be supplied to the melting furnace and the calcination flue gas furnace for low-oxygen gas combustion and supplied to the calcination flue gas furnace and the flash evaporation drying machine for low-temperature flue gas mixing, and the purposes of saving energy of a production line and reducing the oxygen content of the system are achieved. In addition, after tablet vanadium is calcined through a three-step method, ammonia-containing flue gas is led back to be used as a low-oxygen combustion-supporting body for combustion of a melting furnace and a calcination flue gas furnace, ammonia gas is decomposed into hydrogen and nitrogen, and pollution-free water vapor is generated after hydrogen is combusted. The problems of ammonia emission pollution and treatment are successfully solved, the investment and operation cost of the whole system is reduced, and meanwhile fuel consumption is reduced.

A multi-fuel combustor head permits hydrogen-doped or pure hydrogen combustion in some operating conditions. According to the control method of the multi-fuel combustion chamber, a low-pollution and low-carbon combustion organization form can be achieved. The multi-fuel combustion chamber head comprises a duty stage, the duty stage comprises a first air flow channel and a liquid fuel pipe, air provided by the first air flow channel and liquid fuel provided by the liquid fuel pipe are mixed in a pre-mixing space, and a second air flow channel extends on the periphery of the pre-mixing space, an outlet is located in the downstream side of the premixing space, a swirler is omitted in the second air flow channel, and an air supercharging device is arranged in the second air flow channel so that air can flow out of the outlet in an accelerated mode; the hydrogen distribution pipe comprises a plurality of spraying holes, and the spraying holes are arranged in a transverse spraying mode on the downstream of an outlet of the second air flow channel relative to the air flowing direction of the second air flow channel.

The invention relates to the technical field of hydrogen production, and discloses an ecological cement hydrogen combustion system which comprises a hydrogen supply module, a premixed combustion module, a kiln, a waste heat recovery module and a control module. The hydrogen supply module is connected with the premixing combustion module through a graded pressure stabilizing pipeline, the combustion module is embedded into a kiln firing zone through a multi-layer annular ejector structure, and the waste heat recovery module comprises three stages of heat exchange units which are connected with a raw material preheating system and a generator set. The control module integrates a combustion parameter dynamic optimization algorithm and is provided with a safety interlocking system. Through mutual cooperation of the rotational flow flame stabilizing structure and the gradient heat insulation layer, adaptation of hydrogen energy combustion and a cement sintering process is achieved, the Pt / Al2O3 catalyst layer enables the hydrogen initiation temperature to be reduced to 400 DEG C, the flame temperature uniformity deviation is smaller than or equal to + / -15 DEG C, and the clinker sintering time is shortened by 18% compared with that of a traditional gas kiln.

The invention relates to the technical field of hybrid power system energy management, and discloses a sodium battery SOC and hydrogen combustion efficiency adaptive energy management and control system, which comprises a state sensing module used for constructing a multi-dimensional state vector containing sodium ion battery SOC, temperature and total power requirements; the collaborative decision-making module is used for receiving the state vector based on a reinforcement learning model and outputting a collaborative decision-making instruction containing a power distribution coefficient and a thermal management control factor; the electrothermal coupling management module is used for regulating and controlling the transfer of the waste heat of the hydrogen fuel cell to the sodium ion battery according to the thermal management control factor; and the instruction execution module is used for analyzing the collaborative decision instruction into a bottom layer control signal for each power source and a heat management executor. According to the method, the unified decision framework of the electric energy and the heat energy is constructed, so that global self-optimization of the electric power flow and the heat energy flow is realized, and the overall energy utilization efficiency, the dynamic response capability and the environmental adaptability to wide working temperatures of the hybrid power system can be effectively improved.

The invention discloses a three-dimensional numerical simulation method and system for a hydrogen-doped combustion chamber of a gas turbine, computer equipment and a storage medium, and relates to the technical field of gas turbines.The method comprises the steps that three-dimensional modeling is conducted on the basis of a to-be-simulated combustion chamber of the gas turbine, and a three-dimensional solid model of the combustion chamber is constructed; performing flow field mesh generation on the combustion chamber solid model by using a mesh generation tool to obtain a solid model with a flow field mesh; based on the solid model with the flow field grid, determining boundary conditions, selecting a proper chemical reaction mechanism and a turbulent combustion model, constructing a simulation numerical model, and performing calculation; according to the method, key parameters in the combustion process of the hydrogen combustion chamber can be rapidly and accurately obtained, the combustion state can be more visually mastered, calculation examples of different working conditions are calculated and analyzed and compared, the influence of the hydrogen mixing proportion on the combustion state of the combustion chamber and the pollutant emission condition can be obtained, and the method is suitable for popularization and application. And a calculation result has an important reference effect on practical engineering application.

The utility model relates to the technical field of hydrogen internal combustion engines, in particular to a device for increasing tail gas temperature of a hydrogen internal combustion engine and enhancing pressurization. Comprising the steps that an exhaust hydrogen combustion device and an electronic control unit are additionally arranged on an original exhaust manifold of an internal combustion engine, an auxiliary combustion chamber is installed on the upstream of a turbocharger, the oxygen exhaust flow is calculated through an exhaust flow sensor and an oxygen concentration sensor, the hydrogen spraying flow of a hydrogen nozzle is determined, and hydrogen-air mixed gas is ignited through a sparking plug; therefore, the tail gas enthalpy value of an inlet of the turbocharger is increased through combustion of hydrogen in the auxiliary combustion chamber, the supercharge ratio is increased, and then the inflation efficiency and the power density of the hydrogen internal combustion engine are improved.

The invention relates to the technical field of gas turbines, and discloses a combustion chamber and a pure hydrogen gas turbine with the same. The combustion chamber comprises an outer cover, a flame tube, a cooling cavity and a cooling piece. The inner wall of the outer cover and the outer wall of the flame tube are arranged in a spaced mode to form an outer-layer flow channel, the cooling cavity is arranged in the flame tube and arranged on the outer side of the combustion cavity in a sleeving mode, the cooling cavity communicates with an air inlet channel and an air outlet channel, the air inlet channel communicates with the outer-layer flow channel, and the air outlet channel penetrates through the side wall of the flame tube to communicate with the combustion cavity. The cooling piece is arranged in the cooling cavity, the air inlet end of the cooling piece communicates with the cooling cavity, and the air outlet end of the cooling piece penetrates through the head of the flame tube to communicate with the combustion cavity. Air entering the outer-layer flow channel is divided, air for cooling the flame tube is finally gathered into the combustion cavity again, and therefore the mixing proportion of the air and hydrogen in the combustion cavity is guaranteed, it is guaranteed that the head of the flame tube is cooled, and then stable combustion of the hydrogen is guaranteed.

The invention relates to the technical field of hydrogen internal combustion engines, in particular to a device for increasing the tail gas temperature of a hydrogen internal combustion engine and enhancing pressurization and a control method thereof. Comprising the steps that an exhaust hydrogen combustion device and an electronic control unit are additionally arranged on an original exhaust manifold of an internal combustion engine, an auxiliary combustion chamber is installed on the upstream of a turbocharger, the oxygen exhaust flow is calculated through an exhaust flow sensor and an oxygen concentration sensor, the hydrogen spraying flow of a hydrogen nozzle is determined, and hydrogen-air mixed gas is ignited through a sparking plug; therefore, the tail gas enthalpy value of an inlet of the turbocharger is increased through combustion of hydrogen in the auxiliary combustion chamber, the supercharge ratio is increased, and then the inflation efficiency and the power density of the hydrogen internal combustion engine are improved.

A propulsion system comprises a propulsive hydrogen-burning gas turbine engine, a first tank storing liquid hydrogen with an ullage and a first fuel line including a fuel pump and a vaporiser, the first fuel line providing gaseous hydrogen to the engine during operation of the system. A second tank storing gaseous hydrogen is coupled by a second fuel line to the first fuel line at a position thereon between the vaporiser and the engine, providing for engine start-up (when the vaporiser is inoperative) and power-boosting during operation of the system. A duct connects gaseous hydrogen within the second tank to the ullage in the first tank in order maintain pressure in the first tank as liquid hydrogen within it is depleted, preventing cavitation of liquid hydrogen within the fuel pump.

The system comprises a coal-fired boiler power generation device, a new energy power generation device, a water electrolysis device and a storage device. The coal-fired boiler power generation device comprises a boiler, an oxygen-enriched burner and a hydrogen burner, wherein the oxygen-enriched burner and the hydrogen burner are arranged in a hearth of the boiler. The water electrolysis device is electrically connected with the coal-fired boiler power generation device and the new energy power generation device; the storage device comprises an oxygen storage tank and a hydrogen storage tank, the input end of the oxygen storage tank is connected with the oxygen output end of the water electrolysis device, and the output end of the oxygen storage tank is connected with the oxygen-enriched combustor; the input end of the hydrogen storage tank is connected with the hydrogen output end of the water electrolysis device, and the output end of the hydrogen storage tank is connected with the hydrogen combustor. The energy storage and peak regulation device has the advantages that the stable combustion capacity of a coal-fired boiler power generation device (particularly a boiler) is improved, and the energy storage and peak regulation capacity of a power plant is improved.

The invention discloses a hydrogen energy production and production-and-use distributed energy supply system, which relates to the technical field of new energy, and comprises a hydrogen production module which comprises a proton exchange membrane electrolytic tank, an alkaline electrolytic tank and a solid oxide electrolytic tank and runs through a three-mode collaborative architecture, in combination with a light-electricity-heat synergistic catalysis device and a wastewater or industrial tail gas coupling hydrogen production device, the hydrogen storage and safety management module comprises a metal hydride hydrogen storage unit, a metal organic framework material hydrogen storage unit and a liquid organic hydrogen storage unit. According to the invention, multi-source, high-efficiency and low-cost hydrogen production is realized through the hydrogen production module with a three-mode collaborative architecture in combination with light-electricity-heat collaborative catalysis and wastewater / industrial tail gas coupling hydrogen production, and meanwhile, a solid oxide fuel cell and micro gas turbine combined cycle, a hydrogen combustion turbine direct drive and a multi-type energy storage unit in the energy supply module realize multi-source, high-efficiency and low-cost hydrogen production. And in cooperation with waste heat-cold energy gradient utilization, the energy conversion efficiency and the comprehensive energy utilization rate are greatly improved.

Fuel leak detection, fuel injector leak detection, diagnosis, and / or response to the same are disclosed for a spark-ignited combustion engine that combusts hydrogen fuel. The response to fuel leak detection varies depending on the compartment of the engine in which the leakage is detected. One or more operating parameters of the engine are adjusted to reduce the amount of hydrogen in the one or more compartments of the engine. Fuel injector leak detection is performed during motoring of the engine while exhaust gas characteristic are monitored via a sensor in order to detect the presence of hydrogen in the exhaust system. Variable valve train technology may also be used to diagnose the source of the fuel injector leakage in response to determining a leak condition exists.

A hydrogen fuel system for a work machine is disclosed. The hydrogen fuel system comprises a hydrogen storage tank containing hydrogen, the hydrogen being at least one of a liquid hydrogen or a gaseous hydrogen; a hydrogen power unit configured to consume the hydrogen from the hydrogen storage tank, the hydrogen power unit including at least one of a plurality of fuel cells or a hydrogen combustion engine; a boil-off pressure relief valve in fluid communication with the hydrogen storage tank; and a tank pressure sensor in communication with the boil-off pressure relief valve. The boil-off pressure relief valve is configured to, when the tank pressure sensor detects a pressure inside the hydrogen storage tank that exceeds a boil-off pressure threshold, vent the gaseous hydrogen to a boil-off fuel line fluidly connected to the hydrogen power unit.