874 results about "Hydrogen fuel" patented technology

The invention provides a method for constructing a thickened flame surface model of hydrogen turbulent combustion, which belongs to the technical field of hydrogen fuel engines, and specifically comprises the following steps: modeling a diffusion enhancement effect and a flame surface wrinkle effect caused by multi-scale turbulent flow by constructing a hydrogen fuel turbulent flame speed scale rate under a wide working condition; and the combustion process of the hydrogen fuel can be described more accurately. In addition, on the basis of a thin reaction zone combustion mode, key physical quantities are extracted, a combustion efficiency function is optimized, multi-scale turbulence and a difference diffusion effect are considered, and the thickened flame surface model is further perfected. The development of the method provides powerful technical support for the forward design of the hydrogen fuel engine based on numerical simulation, promotes the engineering application of the hydrogen fuel engine, and assists the hydrogen fuel engine to play a greater role in efficient, clean and safe energy transformation.

The invention relates to the technical field of hydrogen energy aviation, and discloses a hydrogen energy aviation fuel storage-supply system and method based on solid hydrogen storage, and the hydrogen energy aviation fuel storage-supply system and method based on solid hydrogen storage are characterized in that the hydrogen release amount adjusting range of a hydrogen storage material is matched with the hydrogen fuel demand adjusting range of a power device by adjusting the hydrogen release catalytic reaction environment temperature of the solid hydrogen storage material; by adopting the pressure stabilizing device, the problem of flow and pressure fluctuation caused by hysteresis of hydrogen release adjustment is solved, and hydrogen release flow adjustment and engine throttling control can be carried out through the thrust rod.

An integrated hydrogen-electric engine includes, an air compressor system; a hydrogen fuel source; a fuel cell; an elongated shaft connected to the air compressor system or a propulsor; and a motor assembly disposed in electrical communication with the fuel cell, wherein the air compressor system includes a plurality of electrically driven compressors configured to run in series or parallel.

The invention discloses a multi-dimensional multi-physics field coupling analysis platform of a hydrogen fuel cell based on artificial intelligence, and relates to the technical field of hydrogen fuel cells, the platform comprises a user interaction interface module, a multi-physics field model construction module, a data acquisition and preprocessing module, an integration module and an analysis and result output module; an electrochemical reaction model, a temperature field model and a gas and liquid flow model are respectively built through a multi-physical field model building module, the coupling strength among different physical fields is quantified, and the electrochemical reaction model, the temperature field model and the gas and liquid flow model are integrated into a multi-physical field model; physical action parameters such as electrochemical reaction rate, temperature value and the like are associated with time change, spatial distribution and fault conditions, so that the platform can simulate the multi-physical field coupling effect of the hydrogen fuel cell under complex working conditions, and the performance of the fuel cell is analyzed; and a reliable basis is provided for the geometric structure, material selection and operation condition optimization of the fuel cell.

The invention discloses a sleeve type annular cathode open type air cooling hydrogen fuel cell, and belongs to the technical field of hydrogen fuel cells. The air cooling module is vertically arranged on the rack, and the air cooling module comprises an inner cooling bin and an outer cooling bin coaxially arranged outside the inner cooling bin; an air cavity for conduction of an air source is defined between the inner cooling bin and the outer cooling bin; the hydrogen fuel cell stack is vertically arranged in the inner cooling bin; the inner cooling bin is a hollow rectangular shell with two open ends, and a through hole through which an air source is conducted to the hydrogen fuel cell stack is formed in the side wall in a penetrating manner; the outer cooling bin is a hollow rectangular shell with two open ends; the air suction module is vertically arranged in the middle of the inner cooling bin; and the air supply module is vertically arranged in the air cavity in a sliding mode, and the air supply module comprises an upper limiting unit and a lower limiting unit which are arranged in the air cavity in a sliding mode. According to the invention, efficient heat dissipation can be carried out on the hydrogen fuel cell stack, the heat dissipation section can be dynamically adjusted, and the heat dissipation efficiency is high.

The invention relates to the technical field of fuel cell control, and discloses a control method of a hydrogen fuel system controller, which comprises the following steps: in response to a system shutdown instruction, controlling a DC / DC converter to maintain operation and request a preset scavenging current, and consuming residual reaction gas in a flow channel and a pipeline by using an electrochemical power generation reaction in an electric pile; meanwhile, hydrogen-cut air-down operation is executed, and the average single voltage of the electric pile is collected in real time; when it is monitored that the average monomer voltage is reduced to be below a preset anti-corrosion safety threshold value, the DC / DC converter is controlled to be disconnected, and mechanical purging is started. A time sequence interlocking mechanism of electrochemical energy depletion and mechanical purging is established, a high-potential retention path in the shutdown process is blocked from the physical and chemical source, and the safety of the shutdown is improved. Reverse polarity corrosion caused by a hydrogen-air interface effect is avoided, and the service life of the galvanic pile is prolonged.

The invention discloses a dual-fuel engine combustion control method based on hydrogen-ammonia energy ratio and gas distribution overlap angle regulation and control, which comprises the following steps: 1) fuel ratio control: acquiring current operation state parameters of an engine, determining a target AER according to preset mapping, regulating ammonia gas supply quantity and hydrogen supply quantity to enable the actual AER to reach the target AER, and controlling the fuel ratio; the AER is adaptively set according to engine load and combustion stability conditions; 2) valve timing control: adjusting the opening time of an intake valve or the closing time of an exhaust valve through a variable valve timing mechanism so as to change a valve timing overlap angle VOA, wherein the VOA is set to be a negative value, a small overlap angle or a positive overlap angle according to the working condition of an engine; (3) injection time sequence optimization is conducted, specifically, the injection time of ammonia gas and the in-cylinder direct injection time of hydrogen are controlled respectively, and coordinated optimization of a fuel injection strategy and valve timing is achieved; and 4) closed-loop steady-state control: monitoring a combustion state and an emission index in real time, comparing the combustion state and the emission index with a threshold value to serve as a feedback signal, and correcting the target AER and VOA settings in time. According to the dual-fuel engine combustion control method based on regulation and control of the hydrogen-ammonia energy ratio and the gas distribution overlapping angle, the energy ratio of hydrogen fuel and ammonia fuel and the overlapping opening angle of an intake valve and an exhaust valve are dynamically adjusted under different working conditions, so that the combustion reaction rate and temperature are coordinated, and the stable and efficient combustion process is achieved; and harmful emissions of NOx, unburned ammonia and the like are obviously reduced.

An integrated process having an ultra-low GHG footprint for converting Camelina based biomass to liquid fuels and lubricant base stocks in which a Camelina based biomass feed is converted to liquids by a multistep hydroprocessing method and the liquids are upgraded to produce premium hydrocarbon fuels and lubricants.

A fuel system for a hydrogen fuelled aircraft propulsion system comprises a fuel tank configured to store hydrogen fuel, a main fuel conduit configured to provide fuel to a combustor of a gas turbine engine, a fuel heater comprising a catalytic combustor configured to catalytically combust a portion of the hydrogen fuel prior to delivery to the combustor and a heat exchanger configured to exchange heat between exhaust gases from the fuel heater and hydrogen fuel in the fuel conduit.

The invention relates to the technical field of aviation aircraft power systems, and discloses an aero-engine liquid hydrogen fuel conveying system and a control method thereof, which adopt multi-branch high-precision metering to realize wide-range high-precision flow regulation requirements, determine branch through-flow capability by a root order method, and realize high-precision flow regulation of the aero-engine liquid hydrogen fuel conveying system. The number of hydrogen supply branches, the available regulation ratio of the regulating valve and the total flow regulation ratio demand are matched, and the problem of high-precision fuel conveying in an extremely wide flow regulation range is solved. The circulating coupling heat exchanger is adopted to reasonably utilize waste heat of the system to raise the temperature of hydrogen fuel to the level suitable for combustion, reasonable optimization of heat / energy utilization of the system is achieved, fuel consumption is reduced, and circulating heat efficiency is improved. The hydrogen temporary storage tank is adopted to solve the problem that the supply flow of an upstream liquid hydrogen pump and a heat exchanger is not matched with the flow required by a downstream regulating valve due to hysteresis in the heat exchange process in the fuel flow regulation transient process.

A gas turbine engine, comprising: a compressor section, a combustion section, and a turbine section in a serial flow arrangement, with the combustion section comprising: a combustor liner that at least partially defines a combustion chamber; and a fuel nozzle assembly, comprising: a liquid fuel supply to supply a liquid fuel; a hydrogen fuel supply to supply a gaseous hydrogen fuel; and a fuel nozzle body defining a fuel nozzle assembly centerline, the fuel nozzle body fluidly coupled with the liquid fuel supply and the hydrogen fuel supply to provide the liquid fuel and the gaseous hydrogen fuel to the combustion chamber.

The invention discloses an intelligent cooperative control method and system for an extra-heavy hydrogen energy special vehicle, and belongs to the technical field of new energy vehicles. The method comprises the steps of collecting vehicle state data through a sensor network; based on the state data, adopting a model predictive control (MPC) algorithm to solve an optimal torque and distributing the optimal torque to the distributed driving system; according to the part temperature data, a thermal system is regulated and controlled through a thermal management algorithm TMS; and preprocessing the hydrogen system data, inputting the hydrogen system data into the LSTM model, and outputting leakage probability and positioning to execute multi-stage early warning. The system comprises a central controller, a sensor network and a combined driving system. Through multi-core domain control deep fusion of MPC, TMS and LSTM, global optimization collaboration of multiple groups of high-power hydrogen fuel cells, a high-density high-power energy storage battery pack, a liquid hydrogen storage and safety module, multiple groups of axial flux motor driving systems, a sensing network and central control extra-heavy vehicle parts is realized; and the endurance mileage of the vehicle and the intelligent control heavy load performance in a mine field and a special scene are effectively improved.

The application provides a method, system, device and medium for adjusting the opening degree of a pressure stabilizing valve of a hydrogen fuel regulating system. The method comprises: obtaining a desired pressure value of a pressure stabilizing cavity of the hydrogen fuel regulating system and a nominal parameter value of the hydrogen fuel system at each time point, respectively; the nominal parameter value is determined according to actual measurement data of the pressure stabilizing cavity and system characteristics; the actual measurement data comprises an actual pressure value of the pressure stabilizing cavity and an opening degree of the pressure stabilizing valve output by a controller of the fuel regulating system at the last time point; performing system disturbance estimation using the nominal parameter value, the actual pressure value of the pressure stabilizing cavity and the opening degree of the pressure stabilizing valve to obtain a disturbance value centralized in the system; determining an error between the desired pressure value and the actual pressure value; adjusting the error according to the desired pressure value to obtain a basic control amount; suppressing the disturbance value to obtain a control compensation amount; generating a total control amount according to the basic control amount and the control compensation amount and outputting the total control amount to the pressure stabilizing valve to adjust the opening degree of the pressure stabilizing valve.

A system such as a refueling station capable of multi-mode dispensing is provided. The refueling station is configured to dispense a fuel such as hydrogen to vehicles in different modes, for example, in a form selected from liquid hydrogen, cryo-compressed hydrogen, and compressed hydrogen gases under different nominal pressures such as 35 MPa and 70 MPa. A method of making the same and a method of using are also provided.

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 new energy automobiles, and provides a hydrogen fuel cell automobile thermoelectric-thermal management cooperative system and a new energy automobile, and the system comprises a hydrogen fuel electric pile, a main cooling loop and a secondary cooling loop connected in parallel with the hydrogen fuel electric pile. The hot end and the cold end of the thermoelectric conversion module are connected to the primary loop and the secondary loop respectively. A cab evaporator and an auxiliary evaporator are sequentially connected in series through a refrigerant loop of the vehicle-mounted air conditioning system, and the auxiliary evaporator is connected to the upstream of the cold end of the thermoelectric conversion module on the secondary loop in series. The controller controls the air conditioner to operate based on the passenger compartment refrigeration demand. When the air conditioner is started to cool the passenger compartment, the refrigerant flowing through the auxiliary evaporator can cool the secondary loop cooling liquid again, so that the temperature of the cold end of the thermoelectric conversion module is reduced, the power generation temperature difference is increased, the waste heat power generation efficiency is improved, and the overall heat dissipation capacity of the system is enhanced synchronously. According to the system, intelligent coupling and energy gradient utilization of air conditioner refrigeration, waste heat recovery and whole vehicle heat management are achieved.

The invention discloses a method and system for calculating the excess air coefficient of a pure hydrogen fuel internal combustion engine, and the method comprises the steps: obtaining the oxygen concentration in the intake air of the pure hydrogen fuel internal combustion engine; and the hydrogen concentration, the oxygen concentration and the nitric oxide concentration in exhaust gas of the pure hydrogen fuel internal combustion engine are obtained. And calculating the excess air coefficient of the pure hydrogen fuel internal combustion engine by solving a material balance equation set according to the oxygen concentration in the intake air and the hydrogen concentration, the oxygen concentration and the nitric oxide concentration in the exhaust. Therefore, according to the calculation method for the excess air coefficient of the pure hydrogen fuel internal combustion engine, the calculation accuracy of the excess air coefficient is improved, and therefore the combustion efficiency and the emission control effect of the hydrogen internal combustion engine are optimized.

A gas turbine engine, comprising: a compressor section, combustion section, and turbine section in serial flow arrangement, with the combustion section comprising: a combustor liner that at least partially defines a combustion chamber; and a fuel nozzle assembly, comprising: a liquid fuel supply to supply a liquid fuel; a hydrogen fuel supply to supply a gaseous hydrogen fuel; and a fuel nozzle body fluidly coupled with the liquid fuel supply and the hydrogen fuel supply to provide the liquid fuel and the gaseous hydrogen fuel to the combustion chamber.

A hydrogen pressure reducer for a hydrogen supply system of a hydrogen fuel automobile relates to the technical field of hydrogen pressure reducers and comprises a valve body, a diaphragm type pressure reducing mechanism, a pilot-operated electromagnetic valve, a gas inlet and a gas outlet. The interior of the valve body is divided into a high-pressure cavity and a low-pressure cavity through the valve The diaphragm type pressure reducing mechanism is composed of a valve element assembly, a diaphragm assembly and a pressure adjusting assembly which cooperate to enable the output pressure of the air outlet to be kept stable, and assembly errors are eliminated. The valve element assembly is provided with a necking part to adjust the opening degree of a throttling hole, and accurate control is achieved. The base provides guiding constraint, and reliable sealing is ensured. The diaphragm assembly adopts a supporting disc, a diaphragm, a pressing disc and a locking nut fixing structure, so that the diaphragm is prevented from deforming, and the service life is prolonged. The pressure adjusting assembly comprises an upper cover, a pressure adjusting spring, a pressure adjusting spring seat and a pressure adjusting stud, and the pressure adjusting accuracy and stability are guaranteed. The overall reliability, sensitivity and safety of the hydrogen pressure reducer are improved.

The invention discloses a two-stage rotational flow hydrogen fuel nozzle and a combustion chamber thereof. The nozzle comprises a main hydrogen flow path, an auxiliary hydrogen flow path and an air flow path; the hydrogen main flow path is provided with a plurality of main spray holes which are distributed in a circumferential array; the air flow path is provided with a two-stage cyclone; the hydrogen auxiliary flow path comprises a hollow annular flow divider, the flow divider is coaxially arranged around the periphery of the hydrogen main flow path, and a plurality of injection holes are formed in the inner wall and the outer wall of the flow divider and communicated with the first-stage rotational flow channel and the second-stage rotational flow channel respectively. In the using process, efficient mixing of fuel and air is achieved through the synergistic effect of graded injection of main and auxiliary hydrogen and two-stage rotational flow air. According to the combustion chamber provided with the nozzle, large-scale flames are decomposed into a plurality of small flames through micro-scale injection, two-stage rotational flow is combined for strengthening mixing, the backfire risk is effectively restrained, the combustion temperature is lowered, NOx emission is remarkably reduced, meanwhile, the combustion stability is improved, and a reliable solution is provided for hydrogen fuel combustion of an aero-engine.

The invention discloses a method for predicting hydrogen diffusion of a multi-coating material on the surface of a material in a vacuum environment, and belongs to the technical field of hydrogen diffusion of materials. On the basis of a hydrogen atom diffusion mass transfer theory in a single-layer matrix material, a hydrogen atom diffusion mass transfer model of the double-coating material is constructed. The hydrogen atom diffusion differential equation, the capture / removal differential equation and the boundary desorption / adsorption differential equation of the single-layer matrix material are established in combination with respective material parameters corresponding to different materials of each layer, boundary condition parameters are introduced into an interlayer interface, the flux continuity and concentration transition relation between the matrix and the plating layer is processed, and the plating layer is obtained. And further obtaining the hydrogen concentration distribution and the dynamic hydrogen release rate in the multi-coating material. The prediction method disclosed by the invention is suitable for any coating combination, can quickly migrate only by replacing material data, and is suitable for multiple fields such as electronic packaging, vacuum devices, hydrogen fuel cells and the like.

The invention discloses an ammonia hydrogen fuel engine combustion system and method, and belongs to the technical field of clean energy, the system comprises a shell, the shell is provided with a combustion chamber, a pre-combustion chamber, an air inlet channel and an exhaust channel, and the pre-combustion chamber, the air inlet channel and the exhaust channel communicate with the combustion chamber; the injection valve set comprises an air inlet channel hydrogen injection valve, a pre-combustion chamber hydrogen injection valve, a direct injection hydrogen injection valve and an air inlet channel ammonia injection valve. The supply assembly comprises a hydrogen supply unit and an ammonia gas supply unit, the ammonia gas supply unit supplies ammonia gas to the combustion chamber through a gas inlet channel ammonia gas injection valve, and the hydrogen supply unit supplies hydrogen gas to the combustion chamber through a gas inlet channel hydrogen injection valve, a pre-combustion chamber hydrogen injection valve and a direct injection hydrogen injection valve; switching of the pure hydrogen premixed combustion mode, the pure hydrogen stratified combustion mode and the ammonia-hydrogen mixed combustion mode is achieved by adjusting the injection valve set and the supply assembly, the problems of abnormal combustion, power reduction and NOX and N2O emission existing on the engine are solved, and the operation stability of the engine is improved.

The invention discloses a control method and equipment for a hydrogen subsystem of a fuel cell and a storage medium, and relates to the field of hydrogen fuel application. The method comprises the following steps: estimating a system state of the hydrogen subsystem according to a model of the hydrogen subsystem and actual measurement information of the hydrogen subsystem; predicting future output of the hydrogen subsystem according to the model of the hydrogen subsystem and the system state of the hydrogen subsystem; according to the designed performance indexes and future output of the hydrogen subsystem, the rotating speed of a hydrogen circulating pump and the opening degree of a proportional valve are determined, and feedforward compensation is conducted on the determined rotating speed of the hydrogen circulating pump. According to the invention, multi-input and multi-output control from hydrogen pressure feedback and hydrogen in-and-out reactor pressure difference feedback to target hydrogen pressure and target hydrogen in-and-out reactor pressure difference can be realized, so that the control precision is remarkably improved.

The invention discloses a hydrogen fuel SOFC actual combined cycle power generation system based on gas turbine pressurization, and belongs to the technical field of energy power equipment. In the starting stage, air is compressed by a gas compressor and then enters a combustion chamber to be combusted with hydrogen, exhausted gas is introduced into a turbine to do work, electric energy is provided for temperature rise before SOFC reaction through a motor, and turbine exhausted gas sequentially heats hydrogen and air at an inlet of the combustion chamber. Under the stable operation working condition, air sequentially passes through a gas compressor, a flow divider and a heat exchanger to be introduced into an SOFC cathode, hydrogen is heated through the heat exchanger and enters an SOFC anode to be subjected to an oxidation reaction, cathode and anode tail gas and supplemented gas enter a combustion chamber to be combusted, exhaust gas enters a turbine to do work and then is exhausted, and turbine exhaust gas sequentially heats hydrogen of SOFC anode inlet gas and air of cathode inlet gas; wherein the SOFC anode tail gas heats hydrogen supplemented by the combustion chamber through the heat exchanger, and the SOFC cathode tail gas heats air supplemented by the combustion chamber through the heat exchanger.

The invention relates to the technical field of battery heat management, in particular to a low-conductivity electric vehicle battery cooling liquid and a preparation method thereof.The cooling liquid is composed of a composite base solution, a three-stage core-shell structure heat storage functional body, a low-conductivity flame retardant, a precise corrosion inhibition system, a self-repairing agent and a composite additive, the heat storage functional body is prepared through in-situ preparation of the heat storage functional body, ultrasonic high-pressure homogeneous composite dispersion, gradient compounding of auxiliaries and a precise filtering process. The heat storage temperature range is widened through the binary phase change core material, the problems of heat storage material leakage and low heat conduction efficiency are solved through the three-stage core-shell structure, the contradiction between multiple functions and low conductivity is solved through the low-conductivity modification additive, and finally the comprehensive performance of low conductivity, high phase change enthalpy, low metal corrosion rate, wide-temperature-range stable work and long service life is achieved. The cooling liquid is suitable for multiple scenes such as electric vehicles, energy storage power stations and hydrogen fuel cells, the preparation process is controllable, and the cooling liquid is suitable for large-scale production and wide in application prospect.

A fuel system for a hydrogen-fueled gas turbine engine includes a main fuel conduit configured to conduct hydrogen fuel from a hydrogen storage unit to a core combustor of the gas turbine engine, a pre-heater including an auxiliary combustor configured to combust hydrogen fuel diverted from the main fuel conduit to heat hydrogen fuel in the main fuel conduit. A first exhaust passage is configured to conduct combustion products from the auxiliary combustor to the core combustor of the gas turbine engine.

To significantly improve the combustion of a fuel gas containing at least 95% hydrogen by volume in a gas burner (10) for heating purposes, a burner body (16) for the gas burner (10) has been proposed, which, as a burner surface (38) for the passage of a premixed fuel gas-air mixture into a combustion chamber (14), has a perforated metal surface (40) which has through holes (48) such that less than 5% of the burner surface (38) is open. wherein the through holes (48) have hole diameters D with 0.4 mm ≤ D ≤ 1.0 mm, wherein the hole diameters D and / or hole lengths of the through holes vary.

The present application belongs to the technical field of hydrogen fuel cells, and particularly relates to a self-adaptive air-cooled hydrogen fuel cell system with gas-water thermal cooperative management and a control method. The system comprises an anode gas supply subsystem, a cathode gas supply and thermal management subsystem, an auxiliary heat dissipation cooling subsystem, an electric control subsystem and a tail exhaust device. The anode gas supply subsystem adopts comparison of average voltage value of single stack, pressure difference value of anode inlet and outlet and online continuous monitoring of high-frequency impedance value to monitor and execute anode bidirectional gas supply switching. The cathode gas supply and thermal management subsystem intelligently switches evaporation cooling and waste heat recovery modes according to environmental conditions and stack state, realizes the ability of heating cathode inlet gas in low-temperature environment and cooling inlet gas in high-temperature environment, and recycles tail exhaust water through a gas-liquid separation and recycling subsystem. The present application realizes stable operation in full-temperature range, improves stack output performance and service life, and is suitable for portable power sources, unmanned aerial vehicles, backup power sources and commercial vehicle auxiliary power sources.

The invention discloses a thermal management system test method of a hydrogen fuel cell unmanned aerial vehicle, which belongs to the field of energy management and comprises the following steps: a, starting a pipeline heater of a thermal management system, and setting the power of the pipeline heater to be Q1; b, opening an electromagnetic valve, and adjusting a proportional valve to open a branch A and close a branch B; c, starting a fan, and adjusting to an incoming flow wind speed required by the test; d, starting an incoming flow heater, and adjusting the power Q2 of the incoming flow heater to the incoming flow temperature required by the test; e, starting a circulating pump, and recording the circulating flow of the cooling liquid; f, judging whether the cooling liquid inlet temperature is equal to the target temperature or not; g, comparing the cooling liquid inlet and outlet temperature difference with the target temperature difference; and h, the heating power is reduced or improved, and the working conditions of the thermal management system meeting the heat dissipation requirement under different thermal load conditions are obtained. According to the invention, rapid detection of the heat dissipation performance of the heat management system in different working environments can be realized, and the working environment of the heat management system meeting the heat dissipation requirement of the hydrogen fuel cell is obtained.

The invention discloses a cooperative control method for the air-fuel ratio, the injection opportunity and the cooling liquid temperature of a hydrogen fuel engine. The cooperative control method comprises the steps that S1, operation condition parameters and combustion state parameters of the hydrogen fuel engine are monitored; s2, based on the operation condition parameters, adaptively determining a target air-fuel ratio, a fuel injection opportunity and a cooling liquid temperature through a preset control strategy; s3, the combustion state and the engine operation condition are evaluated in real time through a closed-loop feedback control system, and the following cooperative adjustment is executed: the hydrogen supply amount is adjusted to maintain the target air-fuel ratio; the hydrogen injection time is adjusted, and the combustion phase is optimized. According to the cooperative control method for the air-fuel ratio, the injection opportunity and the cooling liquid temperature in the hydrogen fuel engine, the target air-fuel ratio, the hydrogen fuel injection opportunity and the engine cooling liquid temperature are comprehensively adjusted under a closed-loop feedback control framework, optimal control over the combustion process under different working conditions is achieved, and therefore the braking heat efficiency of the engine is improved, and the service life of the engine is prolonged. And pollutant emission is reduced, knocking is restrained, and the application requirement for efficient cleaning of the engine is met.