116 results about "Multifuel" patented technology

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 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.

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 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.

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.

The application provides a side wall burner suitable for multiple fuels and multiple combustion modes, which comprises a hydrogen gun, a fuel gas center gun and the like; fuel gas enters the burner through a fuel gas inlet pipeline of the fuel gas center gun, is ejected through a nozzle, and is injected with part of fuel gas combustion air, the fuel gas and the injected fuel gas combustion air are mixed in an injector, the mixed gas is ejected through an opening on an inner ring of a nested burner head, and premixed or partially premixed combustion is realized; the hydrogen gun is installed in a hydrogen combustion air chamber and is connected with an outer ring of the nested burner head, the outer ring of the nested burner head is radially provided with an opening for ejecting hydrogen, and diffusion combustion is realized; the hydrogen combustion air is ejected along an axial direction through an opening on a hydrogen combustion air supply plate, and is mixed with the hydrogen ejected radially from the outer ring of the nested burner head for mixed combustion. The application realizes stable combustion states of premixed combustion and diffusion combustion for fuel gas with different properties.

An improved hydrogen generation system comprising a multi-port wave reformer in which shock and expansion waves are created in a manner causing head-on colliding shock waves and multi-stage compression where reacting gases within a eight port wave reformer are heated and compressed to thermally crack or decompose one or more fuel sources, such as hydrocarbon fuels, to generate a fuel product containing hydrogen.

The present invention comprises: an engine (6) that can be driven by each of a plurality of types of fuel including carbon neutral fuel; a fuel tank (8) that stores the fuel; a fuel circulation pipe (12) which is connected to the engine (6) and the fuel tank (8) and through which the fuel circulates; and an identification sensor (10) that is directly provided to the fuel circulation pipe (12) and identifies the type of carbon neutral fuel.

The present patent introduces modifications that upgrade the approved claims in WO 2023 / 131386 A1. These modifications include: (i) the inclusion of a new air supply and distribution system permits precise control of the air mass flow rate, adaptive degree of air swirl within a central premix chamber and self-cooling of the burner body and its internal parts, (ii) the adoption of a modular design concept permits mass production of parts, easy assembly and / or spare parts replacement leading to lower manufacturing, maintenance cost, and life time operability, (iii) Operational flexibility due to selection of location, mass flow rate, the magnitude and direction injection velocity of the fuel at different loading conditions that opens the way to the use of different and / or multiple fuels including hydrogen rich fuels enhancement of environmental decarburization, (iv) Ensures the safely and efficient operation down to an ultra-lean mixtures (φ < 0.1) with no concern regarding flashback.

The invention discloses a pressurized water reactor fuel rod performance analysis method and system, and relates to the technical field of fuel performance analysis, and the method comprises the following steps: constructing a solid heat conduction equation of a pellet and a cladding based on a plurality of physical property parameters; solving the solid heat conduction equation under the temperature boundary condition to obtain the temperature distribution of the pellet and the cladding; constructing all strain models of the pellet and the cladding according to the temperature distribution of the pellet and the cladding; inputting a plurality of strain models and a plurality of physical property parameters into a mechanical control equation for describing stress and strain under a pressure boundary condition to obtain stress and strain distribution of the pellet and the cladding; and inputting the temperature distribution of the cladding into the cladding corrosion layer thickness model to obtain the cladding radiation layer thickness. According to the method, the influence of various fuel in-pile behaviors is considered, and the calculation accuracy of the mechanical property of the fuel is improved.

Embodiments described herein relate to systems and methods of operating internal combustion (IC) engines by combusting various fuel chemistries therein. Specifically, engines described herein can operate a wide range of fuel chemistries with varying molecular formulas. The chemical compositions of the fuels described herein make them more difficult to ignite than long chain hydrocarbons (i.e., fuels that include 6 or more carbon atoms in a molecule). In some embodiments, engines described herein can combust fuels that have the chemical properties of alcohols. In some embodiments, engines described herein can combust fuels that include hydroxide groups. Examples of such fuels include methanol and / or ethanol. In some embodiments, engines described herein can combust natural gas. These fuel chemistries are difficult to ignite, particularly at low temperatures and during initial engine startup. Systems and methods described herein address these ignition difficulties, particularly in diesel engine architectures.

The utility model discloses a multi-type fuel synchronous conveying device with a weighing function, and relates to the technical field of fuel conveying, the multi-type fuel synchronous conveying device comprises support frames, a first conveying belt assembly and a second conveying belt assembly, and a first driven roller and a second driven roller are respectively arranged on the left side and the right side between the support frames; the opposite sides of the first conveying belt assembly and the second conveying belt assembly are each provided with a first driving roller and a second driving roller, and a weighing conveying belt is arranged between the first conveying belt assembly and the second conveying belt assembly. A mounting frame is mounted on the rear side of the supporting frame on the front side, a columnar rotating block is mounted on a transmission shaft, and guide rollers are mounted on the left side and the right side of the front surface of the mounting frame. According to the multi-type fuel synchronous conveying device with the weighing function, the first conveying belt assembly and the second conveying belt assembly are arranged, synchronous conveying of multiple types of fuel can be achieved at the same time, and therefore the conveying efficiency of the fuel is improved.