140 results about "Multifuel" patented technology

To provide a fuel pump and fuel injection system that can pressurize a plurality of kinds of fuels in a simple structure.SOLUTION: A fuel pump 10 comprises a first piston 16, a first pressure rising chamber 11, a second piston 21, and a second pressure rising chamber 12a. The first piston 16 is reciprocated by being pushed by a cam 13. The first pressure rising chamber 11 houses a first fuel to be pressurized by the first piston 16, and comprises a first discharge hole 18 for discharging the first fuel. The second piston 21 is reciprocated by being pushed by the first fuel pressurized by the first piston 16. The second pressure rising chamber 12a houses a second fuel to be pressurized by the second piston, and comprises a second discharge hole 23 for discharging the second fuel.SELECTED DRAWING: Figure 1

The embodiment of the invention provides a method and a device for determining thermal safety margin of a reactor core, and belongs to the technical field of nuclear power. The method comprises the steps that initial information of various fuel assemblies in a reactor core is obtained, and the initial information comprises stirring and mixing grillwork geometric characteristics of the fuel assemblies and test results obtained by conducting a critical heat flux density test on the fuel assemblies; determining a target critical heat flux density relational expression corresponding to the reactor core according to the initial information of the multiple fuel assemblies; and performing thermal safety margin calculation on the reactor core according to the target critical heat flux relational expression to obtain a target thermal safety margin. According to the embodiment of the invention, the problem of low accuracy of thermal safety margin calculation of the reactor core in the prior art can be solved, the characteristic difference of different types of fuel assemblies is fully considered, and the accuracy of a thermal safety margin analysis result is improved.

The invention discloses a gas turbine multi-fuel reference real-time voting scheduling method, and relates to the technical field of gas turbine combustion control, and the method comprises the steps: constructing a plurality of fuel control references, carrying out the collection, integration and comparison of the output of each fuel control reference through a real-time voting control loop, and generating a final fuel control reference; according to the real-time monitoring result, intervention and quit of each fuel control reference are dynamically judged; the proportion of diffusion fuel and premixed fuel and the flow of each branch are controlled through a fuel distribution system, and gas turbine multi-fuel reference real-time voting scheduling is achieved. The fuel distribution proportion can be flexibly adjusted under different working conditions, the combustion process is optimized, fine combustion control of the gas turbine under different working conditions is achieved, the comprehensive performance and economical efficiency of the gas turbine are remarkably improved while the combustion efficiency is improved, pollutant emission is reduced, and the equipment safety is enhanced, and the method is suitable for popularization and application. The method has important application value and wide market prospect.

The invention discloses a nickel-iron alloy precipitation type perovskite catalytic material with excellent ammonia decomposition activity and solid oxide fuel cell performance as well as a preparation method and an application of the nickel-iron alloy precipitation type perovskite catalytic material. The general formula of the catalytic material is La < 0.7 > Sr < 0.2 > Fe < 1-x > Ni < x > O < 3-delta > (0 lt, x is smaller than or equal to 0.3), uniform precipitation of Ni-Fe nano-alloy particles is promoted under a high-temperature condition through B-site nickel doping and A-site defect regulation, ammonia decomposition activity is remarkably improved, and electron-ion mixed conductivity of the material is enhanced. A stable three-dimensional polymer network structure is constructed through batch feeding and a citric acid-sol-gel method, the ammonia decomposition rate of the obtained catalytic material at 600-800 DEG C is close to the equilibrium conversion rate, the power density of a fuel cell is remarkably improved, and the problem that a traditional Ni-based anode is prone to sintering and agglomeration at high temperature is effectively solved. The material is compatible with a plurality of electrolyte systems such as YSZ, GDC and SDC, and is suitable for application scenarios such as a plurality of fuel cell electrodes.

A modular utility system integrates clean power generation, thermal management, and security monitoring within a standardized shipping container format. The system comprises a generator set (70 kW-600 kW) configured for operation with multiple fuel sources including natural gas, propane, methane, or hydrogen, coupled to a water-fired absorption chiller utilizing waste heat recovery. A closed-circuit evaporative cooler enhances thermal efficiency without chemical additives. The system incorporates a 360-degree security camera and remote monitoring capabilities for tracking operational parameters. A power distribution panel (460V, 3-phase) supports both building power supply and electric vehicle charging stations. The modular architecture enables scalable deployment through dual-module configurations, with separate power generation and thermal management units. The system provides sustainable, off-grid power generation while maximizing energy efficiency through integrated waste heat utilization and advanced thermal management protocols.

A method of blending at least two fuels includes providing at least two fuels to a mixing chamber via a fuel supply system, the fuel supply system including a fuel supply circuit for each fuel of the at least two fuels, mixing, via baffles of the mixing chamber, the at least two fuels to form a fuel mixture, determining, via one or more sensors, a measured interchangeability index of the fuel mixture, comparing the measured interchangeability index to a predetermined interchangeability index, adjusting, via the fuel supply system, one or more parameters of at least one of the at least two fuels based on the comparison between the measured interchangeability index and the predetermined interchangeability index, and providing the fuel mixture to a combustion system.

The invention discloses a multi-fuel mixing proportion intelligent optimization control method for a variable-working-condition biomass boiler, and relates to the technical field of fuel control. Comprising the following steps: collecting industrial analysis data of various coal types, and recording combustion test data of each coal type; training a neural network model; acquiring a preset load and an initialized fuel proportion as original mixed coal, inputting the original mixed coal into the trained model, and acquiring combustion test data of the original mixed coal; calculating a predicted load and a preset deviation; calculating a proportion correction coefficient, and correcting the proportion of each component of the original mixed coal through a correction method. According to the method, the neural network model is trained through multiple fuel components, hidden influences among different components can be reserved, correction is repeated, the fuel proportion is changed as small as possible according to the previous correction result in each correction, historical data are further fitted, the component proportioning habit is continued, the method adapts to the stock of all the components of the fuel, and the fuel efficiency is improved. And emergencies are prevented.

The invention provides a solid hydrogen storage alcohol hydrogen gasoline, diesel oil and natural gas multi-fuel internal combustion engine, and relates to the technical field of internal combustion engine fuels, the solid hydrogen storage alcohol hydrogen gasoline, diesel oil and natural gas multi-fuel internal combustion engine comprises a multi-fuel internal combustion engine body; the gas storage tank is communicated with a gas inlet pipe of the multi-fuel internal combustion engine body, and a flow regulating valve is mounted on the gas inlet pipe; the hydrogen supply assembly and the natural gas supply assembly are respectively connected with the gas storage tank; a methanol reforming furnace jacket is arranged on the periphery of the methanol reforming furnace, and the methanol reforming furnace is connected with a methanol and gasoline and diesel oil supply assembly; a solid hydrogen storage tank jacket is arranged on the periphery of the solid hydrogen storage tank, the solid hydrogen storage tank is connected with a hydrogen injection pipe and a hydrogen discharge pipe, and the hydrogen discharge pipe is communicated with the gas storage tank. According to the invention, the supply of one or more fuels can be flexibly provided for the internal combustion engine, and the conversion rate of the fuels in the conversion process is relatively high.

The invention discloses a modular multi-fuel industrial burner plasma igniter with an efficient cooling structure. The modular multi-fuel industrial burner plasma igniter comprises an ignition module, an efficient cooling module, a fuel adaptation module and an intelligent control module. A plasma arc generator is arranged in the ignition module and is used for generating a high-temperature ignition source; the efficient cooling module adopts a multi-layer surrounding type flow channel design, and active heat management of the ignition module is achieved through forced circulation of a cooling medium; the fuel adaptation module supports rapid switching and stable supply of various fuels such as natural gas, fuel oil and biomass gas through standardized interfaces and pipelines; the intelligent control module integrates ignition control, fuel switching and thermal management strategies, monitors the system state in real time and automatically adjusts operation parameters. By means of the modular architecture and the efficient cooling technology, the problems that a traditional plasma igniter is prone to overheating damage, poor in adaptability and difficult to maintain under the high-temperature and multi-fuel working conditions are solved.

A method of controlling the supply of multiple fuels to an engine of an aircraft is disclosed. The aircraft includes a first fuel having a first composition and a second fuel having a second composition. The second composition comprises a greater proportion of sustainable aviation fuel, SAF, than the first composition. The engine is supplied with the first fuel during a first phase of flight of the aircraft. During a second phase of the flight of the aircraft, subsequent the first phase, supply to the engine is switched from the first fuel to the second fuel.

The invention discloses a fuel cell hybrid power system energy management strategy considering system heat dissipation performance. The strategy comprises the following steps: establishing a fuel cell system model, a cell model, a fuel cell voltage attenuation model and a power cell capacity attenuation model; carrying out hybrid power system power distribution based on a dynamic planning method; aiming at a dynamic planning power distribution result, respectively adopting a threshold power method and an average power method to correct the output power of the fuel cell, so that the heat generated by the electric pile is matched with the heat dissipation of a radiator, and the temperature of the electric pile is maintained in a reasonable range; and finding a power distribution result which enables the whole life cycle cost to be lowest and meets the heat dissipation requirement. According to the invention, the method is suitable for various fuel cell systems such as mobile and fixed fuel cell systems, the operability is strong, the system performance is effectively improved, the heat dissipation performance of the system is considered, and the life cycle cost of the hybrid power system is reduced.

The application discloses a numerical calculation method and system for fuel blending turbulent combustion differential diffusion, and belongs to the field of turbulent combustion numerical simulation. The method comprises the following steps: a small flame table is established based on one-dimensional counterflow flame equation; through a mapping algorithm, thermodynamic state is parameterized as a function of mixing fraction and reaction process variable; a differential diffusion term of multi-fuel component is derived; control equations of a differential diffusion two-equation small flame model suitable for multi-fuel component under a large eddy simulation framework are established and solved; the model is discretized and coupled with a pressure-velocity field; in the process, simulation results of a small flame model without considering the differential diffusion effect are used as a comparison by the same method to highlight the influence of the differential diffusion effect. The application extends the differential diffusion two-equation model to multi-fuel blending conditions, takes a hydrogen-ammonia blended combustion two-fuel turbulent diffusion flame as an example, compares the mass fraction and temperature distribution of main components through a priori and posteriori method, and quantitatively analyzes the influence of the differential diffusion effect.

A system and a method include a control unit configured to determine one or more fuel levels for an aircraft at one or more arrival airports for one or more alternate flight plans that divert from an original flight plan. The control unit is configured to determine the one or more fuel levels based on traffic at the one or more arrival airports, and performance data for the aircraft.

The present invention relates to the field of cement clinker production equipment, specifically a combustion device of a fuel complementary system, comprising a furnace body, the furnace body is provided with a feeding mechanism for materials and fuel to enter; the feeding mechanism comprises a feeding component for material delivery and a feeding component for fuel delivery; the furnace body is connected with an air inlet duct for tertiary air to enter; the delivery component comprises a delivery pipe arranged on the furnace body for material delivery; the feeding component comprises a coal powder feeding pipe and a biomass fuel feeding pipe. The present invention discloses a combustion device of a fuel complementary system, which can realize the supply of multiple fuels to the furnace body through the optimization of the feeding mechanism, and can well solve the problem of easy crusting on the inner wall of the furnace body in the industry; at the same time, it can meet the large-scale production of cement clinker, save resources, reduce production costs, and realize the reduction and harmless disposal of biomass fuels such as straw.

The present application discloses a method of determining one or more fuel characteristics of an aviation fuel suitable for powering a gas turbine engine of an aircraft, the method comprising: determining a mass of a fuel being loaded, or which has been loaded, onto the aircraft; determining a corresponding volume of the fuel; determining one or more fuel characteristics of the fuel based on the determined mass and volume. Also disclosed is a fuel characteristic determination system, a method of operating an aircraft, and an aircraft.

An internal combustion engine system (100) is described herein. An internal combustion engine system (100) uses one or more fuels that may be hydrophilic. The system uses a water measurement sensor to determine the water concentration in the hydrophilic fuel. To meet the power demand, the system uses the measured water concentration to modify the data stored in the fuel map (136). The fuel map (136) provides a pump speed and a fuel mixing ratio with respect to a given power level to the controller (134). The system receives the data and modifies the data based on the measured water concentration.

A portable heating unit produces substantially breathable heated air due to burn efficiency. Fuel consumption is lower than known heating units. The heating unit may be powered by a variety of fuels, including diesel, propane, or other liquid or gaseous fuels. The heating unit operates independent of external power source by having a fuel tank, a power generator, and batteries. Following a brief warm-up time, the unit ramps up to full speed in less time than known technologies. The incoming air is compressed by a compressor and is forced into a combustor assembly which includes a swirling unit. The combustor provides pre-heating of the fuel while creating turbulence in the incoming air. Where diesel fuel is used, this arrangement increases atomization while creating better fuel-air mixing. The combustor is attached to a turbine which is attached to an exhaust catalyst. The catalyst is attached to a hot air ejector.

Modestly modified automotive engine powered generator systems to substantially improve capability for providing renewable electricity powered grid reliability and energy storage are disclosed. The use of these engines to improve capability for non-grid electricity generation, including affordable and clean fast charging of electric vehicles, is also disclosed. In one embodiment, these automotive engines use high RPM and stoichiometric air fuel ratio operation so as to provide the advantages of substantially reduced cost and NOx emissions. These engines also have multifuel capability that provides highly flexible use of low carbon fuels (such as hydrogen, methanol and ammonia) as well as the use of present fuels that are widely available. When these low-carbon fuels are produced with excess electricity from the grid and supplied to the grid when there is an electricity-supply shortfalls, they can serve as a means of energy storage.

A combustion system includes: a combustor including a first combustion region and a second combustion region continuous with the first combustion region on a downstream side thereof; a first burner including an injection portion of ammonia as first fuel, the injection portion facing the first combustion region, and a first injection portion of second fuel not containing nitrogen atoms, the first injection portion facing the first combustion region; a second burner including a second injection portion of the second fuel, the second injection portion facing the second combustion region; and a control device that adjusts a second fuel flow rate ratio between a flow rate of the second fuel injected from the first injection portion and a flow rate of the second fuel injected from the second injection portion.

The present invention provides control to switch between fuel mixing and non-fuel mixing during engine operation, while continuing a stable engine operation. This control device is an engine control device and comprises: a means for determining whether or not to perform co-combustion control using a mixed fuel, which is obtained by mixing a plurality of fuels, when the engine is in operation; a means for controlling ignition timing of the engine; and a means for performing air-fuel ratio control in a combustion chamber of the engine. When the determination means determines to perform the co-combustion control, the means for controlling ignition timing starts retard control of the ignition timing before supply of the mixed fuel is started, and completes the retard control before the supply of the mixed fuel is started. When the supply of the mixed fuel is started, the means for performing the air-fuel ratio control performs the air-fuel ratio control with a target air-fuel ratio corresponding to a mixing ratio indicating the ratio of each of the plurality of fuels in the mixed fuel.

The invention belongs to the field of fuel cells, and provides a preparation method of a self-supporting low-platinum six-element nano high-entropy alloy electrode and a high-performance fuel cell membrane electrode constructed by the self-supporting low-platinum six-element nano high-entropy alloy electrode. The membrane electrode comprises high-entropy active metal, a porous conductive substrate and an anion exchange membrane, and the precious metal loading capacity of the membrane electrode is smaller than or equal to 5%. Compared with the prior art, the preparation method has the advantages that through the structural design of the self-supporting electrode of the uniformly distributed six-element high-entropy nano-alloy, the electrochemical stability of the membrane electrode is remarkably improved, and the membrane electrode can show higher poison resistance and is suitable for various fuel cells; the self-supporting structure optimizes the mass transfer characteristic of a three-phase interface under the condition of no high polymer adhesive, so that active sites are tightly attached to the carrier, the overall conductivity and stability of the electrode are improved, and the catalytic efficiency of the membrane electrode is improved; especially under a low platinum condition, the service life of the membrane electrode is prolonged, the cost of the membrane electrode is greatly reduced, and wide application of the fuel cell in a sustainable energy system is promoted.

The invention discloses a cold start emission cooperative control method and system for a natural gas engine. The cold start emission cooperative control method comprises the following steps that firstly, cold start recognition is conducted; 2, calculating a cold start emission index CEI in real time; step 3, strategy selection: if the CEI is less than or equal to the emission index threshold value, adopting a post-processing priority regulation strategy; if CEIgt; an in-cylinder combustion optimization collaborative regulation strategy is adopted for the emission index threshold value; and 4, quitting the cold start mode. The method has the advantages that accurate decision making is achieved, the cold start emission severity is comprehensively quantified through CEI, and intelligent strategy switching is achieved; internal and external cooperation of a machine is realized, and global optimum is realized by dynamically distributing in-cylinder and post-processing control weights according to CEI; quick warming and low emission are taken into consideration, and post-treatment ignition is accelerated at the same time; the economical efficiency is good, a fuel economical efficiency loss threshold value is set, and excessive sacrifice of fuel consumption for pursuing emission is avoided; the device is high in adaptability and can be suitable for various fuel forms such as pure natural gas and hydrogen-doped natural gas.

A method of determining one or more fuel characteristics of an aviation fuel suitable for powering a gas turbine engine of an aircraft. The method includes: exposing the surface of a piezoelectric crystal to the fuel; measuring a vibration parameter of the piezoelectric crystal; and determining one or more fuel characteristics of the fuel based on the vibration parameter. Also disclosed is a fuel characteristic determination system, a method of operating an aircraft, and an aircraft.

An aircraft propulsion system includes a compressor section, a combustor section, and a fuel system assembly. The compressor section includes a plurality of inlet guide vanes, an inlet guide vane actuator (IGVA), and an IGVA servo. The IGVA is operably coupled with the plurality of inlet guide vanes. The IGVA servo is connected in fluid communication with the IGVA. The combustor section includes a combustor. The fuel system assembly includes a jet fuel system and a hydrogen fuel system. The jet fuel system is connected in fluid communication with the combustor. The hydrogen fuel system is connected in fluid communication with the combustor and the IGVA servo. The hydrogen fuel system is configured to direct the hydrogen fuel to the IGVA servo to control a position of the IGVA.

The invention provides a multi-objective optimization method and device for biomass-coal blending combustion, and relates to the technical field of combustion optimizing.The method comprises the steps that biomass information and coal information are obtained and normalized and quantified into an information matrix; defining multiple evaluation dimensions, decomposing the information matrix, performing parallel construction and multi-target fitting, and determining a target optimization module; and aiming at the whole blending combustion period, dimension evaluation and integration based on a target optimization module are executed, blending ratio data are determined, and the whole blending combustion period is defined as multiple stages based on blending combustion intensity from the initial blending combustion stage to the complete burnout stage. The technical problems that in the prior art, due to the fact that collaborative optimization of biomass blending combustion and coal blending combustion is insufficient, multiple targets cannot be considered at the same time, and the operation requirements of a coal power unit under different working conditions and multiple fuel combinations are difficult to meet are solved, multi-target optimization is carried out on the whole period of blending combustion, and the operation efficiency of the coal power unit is improved. And the operation requirements of the coal power unit under different working conditions and various fuel combinations are met.

The invention relates to a coal-fired power plant fuel mixing device based on the gravity effect and an adjusting method, and the fuel mixing device comprises a feeding pipe which is provided with at least two feeding ports for main fuel and auxiliary fuel to fall into the feeding pipe; the upper part of the mixing device is communicated with the lower part of the feeding pipe, and the lower part of the mixing device is communicated with the coal feeder; a mixing body is arranged in the mixing device, a mixing surface with a narrow upper part and a wide lower part is formed on the circumferential outer side surface of the mixing body in the vertical central axis direction, the outer diameter of the horizontal section of the mixing surface is gradually reduced, and the outer diameter of the upper end surface of the mixing surface is not smaller than that of the upper end surface of the mixing body, so that various fuels fall on the mixing surface to be mixed. According to the mixing device disclosed by the invention, the mixing surface is arranged in the mixing device, so that the main fuel and the auxiliary fuel are bounced and mixed by impacting the mixing surface, and the fuel can be uniformly mixed.

The invention discloses an ammonia-natural gas synergistic combustion engine control system and control method, and relates to the technical field of engines, and the ammonia-natural gas synergistic combustion engine control system is characterized by comprising a fuel supply system, a high-pressure fuel rail system, an injection control system and an exhaust gas recirculation system, the fuel supply system comprises a diesel supply unit, a natural gas supply unit and an ammonia supply unit; the high-pressure fuel rail system comprises a high-pressure oil rail, a high-pressure gas rail and a high-pressure ammonia rail, and the high-pressure oil rail, the high-pressure gas rail and the high-pressure ammonia rail communicate with a combustion chamber of the engine through a diesel injector, a natural gas injector and an ammonia injector correspondingly. The diesel oil supply unit comprises an oil tank, a first filter and an oil pump; the oil pump pumps diesel oil out of the oil tank through the first filter and then distributes the diesel oil to a high-pressure oil rail or flows back to the oil tank through a second filter; the multi-fuel engine has the advantages that through cooperative use of various fuels, the engine can flexibly switch or mix the fuels according to the market price and the supply condition of the fuels, and the fuel cost is reduced.

The invention discloses a numerical calculation method and system for turbulent combustion difference diffusion of mixed multiple fuels, and belongs to the field of turbulent combustion numerical simulation. Comprising the following steps: establishing a small flame table based on a one-dimensional hedging flame equation, parameterizing a thermodynamic state space into a function of a mixed fraction and a reaction process variable through a mapping algorithm, deducing a difference diffusion term of a multi-fuel component, and establishing and solving a difference diffusion double-equation small flame model control equation suitable for the multi-fuel component under a large vortex simulation framework; discretizing the processing model and coupling a pressure-velocity field; in the process, the same method is used for comparing a small flame model simulation result which does not consider the difference diffusion effect so as to highlight the influence of the difference diffusion effect. According to the method, a difference diffusion two-equation model is expanded to a multi-fuel mixing working condition, dual-fuel turbulence diffusion flame of hydrogen-ammonia mixing combustion is taken as an example, the mass fraction and temperature distribution of main components are compared through a prior method and a posterior method, and the influence of the difference diffusion effect is quantitatively analyzed.

Systems and methods are provided for gas furnace systems, including a pressure transducer and optionally one or more pressure switches for efficiently achieving multiple operating modes and / or multiple fuel-to-air mixtures. The pressure transducer may determine a pressure setting at the heat exchanger and based on the pressure value may determine an amount to open a gas valve. As pressure transducer is capable of detecting a range of pressures, multiple different operational modes may be achieved by adjusting the opening of the gas valve depending on the detected pressure. The pressure switches may be used to calibrate and / or confirm the accuracy of the pressure transducer. For example, the output of a pressure switch may be compared to an output of a pressure transducer at a given inductor fan setting to determine whether the pressure transducer is accurate and / or calibrated.

A system and method for managing a series hybrid powertrain in an electric vehicle platform includes a battery, at least one traction electric motor, an internal combustion engine / motor generator combination and a vehicle supervisory controller. The battery is configured to supply power to the electric motor, and the electric motor is configured to drive the wheels of the electric vehicle. The internal combustion engine / motor generator is configured to generate electricity to recharge the battery pack and optionally provide additional power to the electric motor when necessary. The vehicle supervisory controller is configured to manage the operation of the series hybrid powertrain. The controller is programmed with a set of algorithms that determine the optimal use of the battery, electric motor, and internal combustion engine / motor generator based on various factors, including but not limited to the current state of the battery pack charge, driving conditions, and electric motor power requirements.