1415 results about "Solid oxide fuel cell" patented technology

A propulsion system for an aircraft as disclosed herein may include a nacelle, a shaft positioned centrally within a cylindrical passageway of the nacelle, a fan coupled to one end of the shaft, a turbine coupled to an opposite end of the shaft, an electric motor coupled to the shaft, a compressor positioned within the cylindrical passageway, and a solid oxide fuel cell positioned with a hollow ring-shaped interior of the nacelle. The hollow ring-shaped interior may surround and be isolated from the cylindrical passageway. The turbine may be configured to provide primary torque to the shaft while the electric motor may be configured to provide additional torque to the shaft. The electric motor may be powered an electric output of the solid oxide fuel cell while the turbine may be powered at least in part by output gases from the solid oxide fuel cell.

A propulsion system for an aircraft as disclosed herein may include a nacelle, a shaft positioned centrally within a cylindrical passageway of the nacelle, a fan coupled to one end of the shaft, a turbine coupled to an opposite end of the shaft, an electric motor coupled to the shaft, a compressor positioned within the cylindrical passageway, and a solid oxide fuel cell positioned with a hollow ring-shaped interior of the nacelle. The hollow ring-shaped interior may surround and be isolated from the cylindrical passageway. The turbine may be configured to provide primary torque to the shaft while the electric motor may be configured to provide additional torque to the shaft. The electric motor may be powered an electric output of the solid oxide fuel cell while the turbine may be powered at least in part by output gases from the solid oxide fuel cell.

The invention discloses a fuel cell system modeling and control-oriented joint simulation design method, which comprises the following steps of: based on an electrochemical and heat transfer mechanism, dividing an electric pile into a plurality of nodes along a reaction gas flowing direction by adopting a distributed parameter method, and establishing a one-dimensional solid oxide fuel cell dynamic model by applying a multi-field unified modeling language Modelica; establishing a dynamic model of each auxiliary machine part of the solid oxide fuel cell system; all the components are connected according to a unified interface to form a system overall dynamic model, and dynamic simulation is carried out; carrying out multi-output multi-input state space model identification in SIMULINK by applying dynamic simulation data of the solid oxide fuel cell system; a model prediction controller KF-MPC based on Kalman filtering is developed; and establishing a joint simulation platform. According to the invention, rapid and accurate load tracking and temperature control are realized, and the operation safety of the system is maintained at the same time.

The invention discloses a gas-heat-electricity balance management and control method and system for a kilowatt-level SOFC (solid oxide fuel cell) cogeneration system, and belongs to the field of solid oxide fuel cells. The method comprises the following steps: setting initial operation parameters according to structure parameters and design working conditions of an SOFC electric pile, a heat exchanger, a reformer and a catalytic burner; a module start-stop coordination instruction is generated through the integrated controller, and temperature and pressure changes of all the modules in the start-stop process are controlled; system operation data are monitored in real time through a sensor, real-time diagnosis is conducted through a multi-dimensional data fusion algorithm, and abnormal states such as over-burning, over-air and temperature runaway are recognized; and according to the diagnosis result, the fuel flow, the air flow, the heat exchange power and the like are adjusted through a multivariable dynamic regulation and control strategy, so that reactor temperature fluctuation is controlled, and a temperature runaway early warning signal is generated. According to the method, the overall stability and efficiency of the SOFC combined heat and power system are improved by optimizing gas-heat-power balance management and control.

The invention belongs to the technical field of solid fuel cells, and particularly relates to a hybrid-driven SOFC (Solid Oxide Fuel Cell) combined heat and power system service life prediction method, which comprises establishment of an SOFC system dynamic attenuation model and establishment of a hybrid-driven SOFC system service life prediction model. The service life of the system is predicted by simulating the dynamic attenuation of the SOFC combined heat and power system and performing machine learning, so that the performance of the whole SOFC combined heat and power system is predicted, and the influence of the interaction of each component on the service life of the system under the long-time operation of the system is analyzed. The method is short in test time and high in accuracy, the cost is saved, and the research and development progress is accelerated; an important reference basis is provided for long-life operation of the system, the influence of BOP parts on the whole life of the system can be clearly analyzed, and a direction is pointed out for the long-life operation of the system; and a machine learning method is utilized to avoid accidental results possibly existing in single simulation, so that the results have universality.

The invention discloses an A-site high-entropy solid oxide fuel cell cathode material as well as a preparation method and application thereof, and provides an A-site high-entropy solid oxide fuel cell cathode material Pr < 0.2 > M < 0.2 > La < 0.2 > Ba < 0.2 > Sr < 0.2 > Co < 0.8 > Fe < 0.2 > O < 3-delta > with a perovskite phase. The preparation method comprises the following steps: S1, weighing multi-element metal nitrates, and mixing to obtain a first mixed solution; s2, dissolving ethylenediamine tetraacetic acid in ammonia water to obtain a second mixed solution; mixing the first mixed solution, the second mixed solution and citric acid to form a mixed precursor solution; s3, carrying out second heating treatment on the mixed precursor solution, and adjusting the pH value to form a gel precursor; and S4, carrying out pre-sintering treatment, third heat treatment and calcination treatment on the gel precursor to obtain a high-grade powder precursor, and carrying out ball milling and sieving treatment to obtain the A-site high-entropy solid oxide fuel cell cathode material. The cathode material is high in stability and good in chemical compatibility with a barrier layer GDC, provides high-quality mass transfer channels and active sites for O2 / O- / O2-, and has good electrochemical performance at medium and low temperatures.

The invention discloses a preparation method of an anode support of a solid oxide fuel cell, which is based on a freezing tape casting process, designs and prepares an applicable one-way freezing tape casting mold, and builds a simple freezing tape casting device in combination with the mold. Meanwhile, the invention further provides a complete preparation process of the NiO-3YSZ anode support with the obvious pore direction, and the preparation process comprises the specific preparation processes of slurry preparation, ball milling, defoaming, freezing and casting, drying and sintering and the like. According to the freezing casting device and the preparation process, the anode support with obvious pore direction can be prepared, the anode support is beneficial to gas transmission, the gas transportation capability of the anode support of the solid oxide fuel cell can be improved, and the performance of an SOFC product is improved.

The invention discloses a preparation method of a solid oxide fuel cell GDC barrier layer, which comprises the following steps: mixing and grinding Gd (NO3) 3.6 H2O and Ce (NO3) 3.6 H2O, and then preparing GDC nano powder through pyrolytic reaction; gDC nano powder and a sintering aid are mixed and ground to obtain powder for printing, the sintering aid comprises Gd (NO3) 3.6 H2O and Ce (NO3) 3.6 H2O, the molar ratio of the Gd (NO3) 3.6 H2O to the Ce (NO3) 3.6 H2O is 1: 4, and the mass of the sintering aid accounts for 5 wt%-20 wt% of the total mass of the sintering aid and the GDC nano powder; mixing the printing powder with a binder to prepare a printing slurry: printing the printing slurry on an electrolyte matrix, drying, and carrying out cold sintering; and annealing. According to the method, small-size particles are obtained through the pyrolytic reaction, densification of the barrier layer is facilitated, density improvement and annealing temperature reduction are also facilitated through selection of the sintering aid, the GDC barrier layer high in density and complete in structure can be obtained by combining the cold sintering technology, the interface performance is improved, and the performance of the solid oxide fuel cell is improved. The invention also discloses an electrolyte and a solid oxide battery.

The invention provides an ammonia / kerosene dual-fuel precooling engine and a fuel cell power generation system, and belongs to the technical field of aviation systems. The problems of poor variable working condition performance of an engine, difficulty in matching of a gas compressor and a turbine, low working efficiency, fuel waste and the like due to the fact that working of the gas compressor is limited by overhigh total temperature of flying incoming flow air under the high Mach number of an aircraft are solved. According to the invention, the electric energy generated by the solid oxide fuel cell system is supplied to the aircraft load and the motor, and the motor drives the secondary gas compressor to do work in a manner of coaxial installation with the secondary gas compressor, so that the previous single-pole compression is changed into multi-stage compression. A dual-fuel pre-cooling propulsion method is adopted, liquid ammonia and aviation kerosene are selected as dual fuels of the system, the heat sink requirement for incoming flow air pre-cooling can be met, the fuel heat value requirement needed when the aircraft flies at the high Mach number can also be met, and therefore stable and safe flight of the aircraft at the hypersonic speed becomes possible.

The invention relates to a single-side gas inlet SOFC burner with wide working condition and low pressure loss in the field of solid oxide fuel cells. An ignition rod sleeve for arranging an ignition rod is arranged in the middle of the top of a combustion chamber of the single-side gas inlet SOFC burner; the top of the combustion chamber is further provided with an anode tail gas distribution channel and a cathode tail gas distribution channel, and the anode tail gas distribution channel and the cathode tail gas distribution channel are sequentially arranged on the periphery of the ignition rod sleeve in a surrounding mode. And cathode tail gas and anode tail gas are uniformly introduced into the combustion chamber in a ring-surface-shaped gas outlet manner after passing through respective independent distribution channels. The anode tail gas and the cathode tail gas are evenly input into the combustion chamber in an annular mode, the consistent flow density is kept on the annular face, the two kinds of tail gas are fully mixed in the combustion chamber, the ignition rod conducts centered ignition, flame deflection is avoided, local overheating is reduced, the stable combustion state is achieved, and stable combustion within the wide working condition range can be achieved easily; and the pressure loss caused by non-uniform gas distribution is reduced.

The invention discloses an elliptical wave-shaped runner structure of a solid oxide fuel cell and an optimization method of the elliptical wave-shaped runner structure, the runner structure comprises a cathode connecting piece, a single cell and an anode connecting piece which are sequentially arranged from top to bottom, the cathode connecting piece is connected with the single cell to form a cathode runner, and the anode connecting piece is connected with the single cell to form an anode runner; the anode connecting piece is connected with the single battery to form an anode flow channel; projections of the cathode flow channels and the anode flow channels on the surfaces of the single cells are rectangular; and the surfaces of one sides, far away from the single cells, of the cathode flow channels and the surfaces of one sides, far away from the single cells, of the anode flow channels are wavy concave-convex curved surfaces. The flow channel structure disclosed by the invention can reduce the pressure drop of the flow channel, improve the non-uniform distribution of gas in the flow channel, improve the mass transfer efficiency, promote heat exchange and improve the performance of the battery.

The invention provides an SOFC (solid oxide fuel cell) stack and a method for converting methane into low-carbon hydrocarbon and generating electric energy, the SOFC stack comprises a plurality of stack basic units, each cell stack basic unit comprises an electrolyte, a cathode and an anode which are arranged on two sides of the electrolyte, a cathode current collecting layer and an anode current collecting layer which are respectively arranged on the cathode and the anode, and a current collecting connector for connecting the cathode and the anode of the adjacent cell stack basic unit; wherein the collector connector is made of martensitic stainless steel, and chemical modification layers are arranged on the cathode side and the anode side of the collector connector; and a methane oxidative coupling catalyst is loaded on the chemical modification layer on the anode side of the current collecting connector. According to the invention, the chemical modification layer is formed on the surface of the collector connector made of martensitic stainless steel, and the methane oxidative coupling catalyst is loaded on the chemical modification layer on the anode side of the collector connector, so that the formation of carbon deposition on the surface is effectively inhibited, and the yield of low-carbon hydrocarbon products generated by methane conversion is improved.

The invention relates to a self-heating catalysis propane partial oxidation reforming coupling tube type solid oxide fuel cell system and a preparation method of a catalyst and a carrier thereof. The system comprises a fuel cell tube and a honeycomb type catalyst carrier with the catalyst, the fuel cell tube comprises a cathode layer, an electrolyte tube and an anode layer; the anode layer is located on the inner wall of the electrolyte tube, and the cathode layer is located on the outer wall of the electrolyte tube; the honeycomb type catalyst carrier is mounted at a gas inlet end of a fuel cell tube and is communicated with an inner cavity of the fuel cell tube, the catalyst is a ruthenium-based active component, comprises RuO or metal Ru and is doped with CeO as a dispersing aid, the loading capacity of Ru is 0.5-5wt%, and the proportion of CeO is 0.5-3wt%. The method has the advantages that the mechanical stability is good, the influence of the anode reduction process on the starting time is eliminated, the influence of anode carbon deposition on the performance of the SOFC is reduced, and rapid heating and rapid power generation are realized.

The invention provides a hybrid power device and an aircraft, and relates to the field of aircraft power systems. The hybrid power device comprises a power supply system and a control system. The power supply system comprises a solid oxide fuel cell module, a storage battery module and a super capacitor module. The solid oxide fuel cell module comprises an integrated plate type metal support solid oxide fuel cell or electric pile and has the advantages that the fuel gas sealing performance is good, the number and the weight of structural parts such as metal connecting bodies, end plates and sealing materials are reduced, the light weight can be realized, and the power-to-weight ratio is favorably improved. The control system comprises an operation control module and an energy management module; the energy management module is connected with the power input end of the aircraft to obtain the power requirement of the aircraft and calculates the output power of the solid oxide fuel cell module, the storage battery module and the super-capacitor module according to the requirement, the weight of a power system is reduced, the flight endurance time is prolonged, and the flight safety is improved. And the output performance and the service life of the hybrid power system are greatly improved.

The invention discloses an electricity and heat coordination method and system of a solid oxide fuel cell heat and power cogeneration system. The method comprises the following steps: acquiring a system operation parameter set (an electric load, a heat load, an electric pile temperature, a tail gas temperature and a fuel flow) in real time; determining a thermoelectric coordination control target value including a target power generation efficiency interval and a target heat supply temperature interval based on the parameter set; a fuel supply and air flow adjusting instruction is generated; executing the instruction to dynamically match the output power of the system with the electric load demand, dynamically match the output temperature of the waste heat recovery system with the thermal load demand, and generate a real-time heat-to-power ratio; when the stack temperature exceeds a preset safety threshold value, the fuel flow is preferentially reduced to a temperature return safety interval, and the air flow is synchronously compensated according to a stoichiometric ratio; and dynamically correcting the boundary value of the target power generation efficiency interval based on the real-time heat-to-electricity ratio, so that the real-time heat-to-electricity ratio of the system is always in the preset optimal efficiency interval. According to the invention, dynamic decoupling control and continuous efficiency optimization of the electric heating load are realized.

The invention relates to a cathode material of a medium-temperature solid oxide fuel cell as well as a preparation method and application thereof, and belongs to the technical field of fuel cells. The cathode material comprises a cathode material body and a doped coating layer, the cathode material body comprises a perovskite material, and the doped coating layer material comprises platinum; by doping and coating platinum on the surface of the cathode material body, the electronic structure of the material surface is improved, the electronic conductivity is improved, and the transmission of electrons on the surface is smoother. Platinum provides a large number of efficient oxygen reduction reaction active sites on the surface of the cathode material body, and platinum has a unique electronic structure, so that the adsorption and dissociation processes of oxygen molecules can be greatly accelerated, the activation energy of the oxygen reduction reaction is remarkably reduced, and the catalytic activity of the whole cathode material is greatly improved. And meanwhile, platinum on the surface of the cathode material body forms a stable protection layer in a medium-temperature environment, so that the problems of oxidation, corrosion and the like on the surface of the material are effectively prevented, the chemical and structural stability of the surface is maintained, and the service life of the material is prolonged.

The invention belongs to the technical field of new energy solid oxide fuel cells, and particularly relates to a recoverable PCFC cathode material and a preparation method and a recovery method thereof. The invention provides a novel recoverable PCFC cathode material as well as a preparation method and a recovery method thereof in order to solve the technical problems that the performance of a cell is degraded due to the fact that an existing cathode material of a proton ceramic fuel cell (PCFC) is poor in matching degree with a common electrolyte material and is easy to separate from the common electrolyte material, and a complete PCFC cathode recovery technology is still lacked, and provides a novel recoverable PCFC cathode material and a preparation method and a recovery method thereof. The novel PCFC cathode material has the advantages of high activity, recoverability and the like, the recovery method is simple to operate and low in energy consumption, the recovery rate can reach 100% theoretically, and the novel PCFC cathode material is easy to popularize and use.

The present disclosure provides a prediction method of electrochemical and mechanical performances of a Solid Oxide Fuel Cell (SOFC) in a cold-hot cycle, and belongs to the technical field of SOFCs. In the present disclosure, a cold-hot cycle test is performed on SOFC pile, a polarization curve and an electrochemical impedance spectroscopy are measured by an electrochemical workstation, and contributions of different electrode reaction processes to voltage attenuation are analyzed quantitatively; the mechanical performance (bending strength, elastic modulus and hardness) after different numbers of cold-hot cycle services is tested, and based on change of Ni particles, the electrochemical performance and the mechanical performance of the SOFC pile are quantitatively associated; an attenuation coupling relationship of the electrochemical performance and the mechanical performance of the SOFC pile is disclosed and an attenuation theory model of the electrochemical performance and the mechanical performance of the SOFC pile is built. In this way, a change law of the electrochemical performance and the mechanical performance of the SOFC pile after different numbers of cold-hot cycles and a cold-hot cycle service life of the SOFC pile can be accurately predicted, which is of great significance to improve the thermal shock resistance of the cold-hot cycles of the SOFC pile, so as to promote SOFC commercialization applications.

The invention relates to the technical field of solid oxide fuel cells, and discloses an SOFC-heat storage-heat pump multi-energy complementary system and a cooperative control method, and the system comprises a fuel processing module, an SOFC power generation device, a gas turbine, a heat storage system and a heat pump. The invention further discloses a cooperative control method for the SOFC-heat storage-heat pump multi-energy complementary system. The cooperative control method comprises the following steps that S1, a three-level cooperative control framework of a global optimization layer, an equipment control layer and an execution layer is established; s2, constructing an information interaction framework; s3, constructing a dynamic energy management strategy, and implementing waste heat hierarchical scheduling; s4, constructing an electric power-thermal power collaborative optimization regulation and control mode; s5, constructing an optimization objective function, optimizing the objective at fixed time, and performing rolling optimization; and S6, carrying out calibration of the weight coefficient of the optimization objective function and calibration of balance between the prediction time domain and the control time domain. According to the invention, the effects of minimizing the operation cost, maximizing renewable energy consumption and prolonging the service life of equipment are realized.

The invention discloses a thermal fatigue life prediction method of a solid oxide fuel cell electrode plate, and belongs to the technical field of fuel cells. According to the method, a full-size SOFC electrode plate finite element model is established, an electrode plate preparation process is simulated, and an electrode plate residual stress distribution field is obtained; a finite element model of the full-size SOFC electric pile unit is also established, a circulating heat temperature field is applied based on the obtained residual stress distribution field of the electrode plate for numerical simulation, and the evolution rule of the thermal stress of the electrode plate in the electric pile unit under the start-stop circulating working condition is obtained; meanwhile, an electrode plate thermal fatigue damage prediction model is constructed, the evolution rule of the damage coefficient of the electrode plate along with the number of thermal cycles is calculated according to the obtained evolution rule of the thermal stress of the electrode plate, and the thermal fatigue life of the electrode plate is predicted. According to the method, the thermal fatigue life of the electrode plate is predicted, and a theoretical reference can be provided for the design of a galvanic pile and preventive maintenance in an operation process, so that long-term stable operation of the galvanic pile is ensured.

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

The invention provides a heat-electricity coupling driven indirect cooling and heat regeneration mixed exhaust turbofan engine, and belongs to the technical field of aero-engines, the heat-electricity coupling driven indirect cooling and heat regeneration mixed exhaust turbofan engine comprises an engine body, and an indirect cooling and heat regeneration heat exchange system, a transmission system and an electric propulsion system are arranged in the engine body; the electric propulsion system is connected with the transmission system and drives the transmission system to do work, the transmission system and the electric propulsion system are both arranged at the middle section position of the engine body, and the indirect cooling heat regeneration heat exchange system is arranged at the head section position and the tail section position of the engine body. According to the heat-electricity coupling driven intercooling regenerative mixed exhaust turbofan engine, the solid oxide fuel cell is introduced, so that the thermodynamic cycle effective work of the engine is increased, the overall energy utilization rate of a propulsion system is remarkably improved, an optimal power supply degree design value interval is provided, and the power supply degree design value interval is optimized. And a design reference basis is provided for reasonable thermal-electric energy distribution of the corresponding propulsion system configuration in the design stage.

The invention relates to a solid oxide fuel cell and a preparation method thereof. The solid oxide fuel cell comprises a sheet substrate, a first cell monomer and a second cell monomer, wherein the first cell monomer and the second cell monomer are fixed on the front and back surfaces of the sheet substrate; each of the first battery monomer and the second battery monomer comprises a porous supporting layer, an anode functional layer, an electrolyte layer and a cathode functional layer which are sequentially stacked and connected; the sheet body substrate is connected between the porous support layer of the first battery monomer and the porous support layer of the second battery monomer; a separation groove is formed in the sheet body substrate, and a fuel gas flow channel is formed among the separation groove, the first battery monomer and the second battery monomer. After the pipeline connected with the fuel gas is communicated with the fuel gas flow channel, the fuel gas only flows in the fuel gas flow channel, and the fuel gas flow channel has good sealing performance. And the porous supporting layer, the anode functional layer, the electrolyte layer and the cathode functional layer are planar sheet bodies which are printed and formed layer by layer, so that the manufacturing difficulty is low, industrial large-scale manufacturing is facilitated, and the production cost is reduced.

The invention belongs to the field of energy conversion and storage, and particularly discloses a multi-physics field coupled SOFC flow field optimization and device, and the method comprises the steps: initializing the parameters of a single solid oxide fuel cell SOFC flow field, and obtaining an initial population corresponding to an extended ridge structure; determining the length of the extended ridge structure of the SOFC, and calculating flow distribution information and temperature distribution information of an SOFC flow field under the extended ridge structure by using a multi-physics field coupling method; calculating the fitness of the initial population according to the flow distribution information and the temperature distribution information to obtain a calculation result; performing iterative optimization on the SOFC flow field based on the calculation result by using a multi-population genetic algorithm so as to obtain the optimally prolonged ridge structure length of the SOFC flow field; according to the invention, the performance and the service life of the battery can be improved.

The invention discloses a marine LNG solid oxide fuel cell energy gradient utilization zero-carbon emission system and an operation method thereof. According to the technical scheme, the energy utilization rate can be effectively increased, gradient utilization of cold-heat-electricity composite energy can be achieved, and the technical advantages of pure electric power, low noise, no pollution, zero carbon emission and high energy efficiency of a ship system are reflected. The marine fuel cell zero carbon emission system comprises a solid oxide fuel cell-HCCI internal combustion engine module, an exhaust gas carbon capture module, an ORC cycle module, an air supply module, an external reforming module and an energy distribution module. The waste gas carbon capture module is used for capturing waste gas generated by the system and is used for being linked with the ORC circulation module. And the ORC cycle module is linked with the solid oxide fuel cell-HCCI internal combustion engine module. The air supply module is used for exchanging heat with the HCCI internal combustion engine through external air. The external reforming module is used for providing heat and water vapor to the reformer.

The present invention provides an integrated structure composite conduction type solid oxide cell and a preparation method thereof, and belongs to the technical field of solid oxide fuel cells, the integrated structure composite conduction type solid oxide cell comprises: an integrated skeleton, the integrated skeleton comprises an electrolyte layer and porous layers on two sides, the integrated skeleton is composed of a proton conductor material and an oxygen ion conductor material, the molar ratio of the proton conductor material to the oxygen ion conductor material is 1: (0.8-1.2), and the proton / oxygen ion composite material is prepared by mixing and sintering the proton conductor material with the average particle size of 50-60 nm and the oxygen ion conductor material with the average particle size of 0.1-0.2 [mu] m; the catalyst layer is positioned on the pore wall of the porous layer. According to the invention, by limiting the proportion and the particle size of the proton conductor material and the oxygen ion conductor material, more conduction type paths are prepared, and the output power of the solid oxide battery is improved.

The invention discloses a solid oxide fuel cell performance influence analysis method which comprises the following steps: establishing a three-dimensional model of a solid oxide fuel cell according to geometric parameters of the solid oxide fuel cell; selectively adding multiple physical fields coupled with an electric field, a flow field, a temperature field and a concentration field into the constructed three-dimensional model; determining boundary conditions influencing the performance of the solid oxide fuel cell, wherein the boundary conditions comprise a gas inflow mode, operation parameters and geometric parameters; according to the selected boundary conditions, obtaining steady-state calculation results of the solid oxide fuel cell in a multi-physical field under different working conditions; and according to a steady-state calculation result, analyzing a characteristic relationship between each parameter and the solid oxide fuel cell, and carrying out reasonable analysis on factors influencing the performance of the solid fuel cell. According to the method, the performance influence factors of the solid oxide fuel cell are analyzed, and reference is provided for performance optimization.

The invention provides a solid oxide fuel cell nondestructive all-condition detection system and an operation method, and relates to the technical field of solid oxide fuel cell detection. The lossless full-working-condition detection system for the solid oxide fuel cell comprises a lossless detection assembly, a data acquisition and transmission module, a data processing and analysis module and a control and feedback module. The nondestructive testing assembly comprises an electrochemical impedance spectroscopy module, an acoustic emission sensing module, a gas sensing analysis module and a thermal imaging module; the data acquisition and transmission module is in communication connection with the nondestructive testing assembly; the data processing and analysis module is in communication connection with the data acquisition and transmission module; and the control and feedback module is in communication connection with the data processing and analysis module. The lossless all-condition detection system for the solid oxide fuel cell not only can improve the operation efficiency, safety and reliability of the solid oxide fuel cell, but also can realize lossless, all-condition and full-range effective detection.

The invention relates to the technical field of solid fuel cells, and discloses a porous gradient anode supported solid fuel cell impedance optimization method which is applied to a system comprising a plurality of porous gradient anode impedance sensors and an optimization controller. The method comprises the steps that a sensor collects voltage and current data to generate an impedance state data set; the optimization controller constructs a regional impedance state matrix, extracts features through processing, performs impedance distribution prediction in combination with a potential gradient and the like, outputs spatial and temporal distribution features through an impedance optimization model, and updates a data set; and dynamically optimizing regional electrode parameters according to the distribution characteristics, including voltage adjustment, current aggregation, resistance distribution and other operations. According to the method, through multi-sensor distributed acquisition, multi-dimensional feature analysis and dynamic modeling, accurate prediction and parameter dynamic regulation and control of electrode impedance spatial and temporal distribution are realized, the performance and stability of the solid fuel cell are improved, and the method is suitable for the field of solid fuel cell management.

The utility model discloses a solid oxide fuel cell (SOFC) system combined with a Stirling engine, and belongs to the technical field of SOFC systems. The device comprises an SOFC electric pile, the SOFC electric pile comprises a fuel input end, an air input end and a tail gas output end, the fuel input end is connected with a reformer, the air input end is connected with an air pump, and the tail gas output end is connected into a combustor of a Stirling engine; the air pump is divided into two paths to be connected into the air input end, one path is connected into the air input end after passing through the heat dissipation end of the Stirling engine, and the other path is directly connected into the air input end; and waste gas generated by the Stirling engine is introduced into the reformer to provide heat for the reformer. According to the utility model, tail gas generated by the SOFC electric pile is introduced into the Stirling engine for direct combustion, so that energy waste is avoided, meanwhile, the control valve is arranged for shunting air, the flow of air in different paths is controlled to control the power of the system, and energy is saved.