Modeling method of combined cooling heating and power system based on SOFC (Solid Oxide Fuel Cell)

Abstract

The embodiment of the invention provides a modeling method of a combined cooling heating and power system based on an SOFC (Solid Oxide Fuel Cell), a delay comparison device of multi-source data, electronic equipment and a computer readable storage medium. An SOFC energy quantum model, an SOFC mixed gas component quantification sub-model, an SOFC exhaust mixed gas temperature quantification sub-model, a combustor mixed gas component quantification sub-model and a combustor mixed gas temperature quantification sub-model are constructed, so that modeling quantification of components, temperature and heat energy of fuel cell exhaust high-temperature mixed gas is realized; and a judgment basis is provided for predicting the performance of the CCHP system.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of combined heat and power systems, and in particular, to a modeling method for a combined heat and power system based on SOFC, a modeling device for a combined heat and power system based on SOFC, an electronic device, and a computer-readable storage medium. Background Art

[0002] In recent years, hydrogen energy has attracted widespread attention in industry and academia due to its significant advantages such as high enthalpy, zero carbon emissions, long-term storage and environmental friendliness. Samarium Doped Ceria (SDC) Solid Oxide Fuel Cell (SOFC) can convert hydrogen energy into electrical energy and thermal energy at an operating temperature of 500-800℃. It can be used in conjunction with heat exchangers, hot water storage tanks, absorption chillers and other equipment to cover the cooling, heating and electricity needs of buildings. Therefore, SOFC has been widely used in the combined cooling, heating and power (CCHP) system of building energy supply, and has far-reaching application prospects in promoting green and low-carbon building renovation.

[0003] As the core component of the CCHP system, the tail exhaust high-temperature gas output by SOFC needs to be mixed and burned in the burner to further increase the temperature, and then drive the exchange heating process of domestic water or house heating, as well as the generator heating process of the absorption refrigerator, to achieve the supply of cold and heat to the house. Therefore, in system design and performance simulation prediction, the quantification of the composition, temperature and thermal energy of the tail exhaust high-temperature mixed gas of SOFC is particularly important. However, the current modeling and design of SOFC CCHP systems rarely consider the high-accuracy quantification of the tail exhaust mixed gas characteristics. Summary of the invention

[0004] Based on this, it is necessary to provide a modeling method for a combined heat, cooling and power system based on SOFC, a modeling device for a combined heat, cooling and power system based on SOFC, an electronic device and a computer-readable storage medium to address the above-mentioned technical problems, so as to model and quantify the components, temperature and thermal energy of the high-temperature mixed gas at the tail exhaust of the fuel cell, and provide a basis for judging the performance of the CCHP system.

[0005] In a first aspect, an embodiment of the present application provides a modeling method for a combined heat and power system based on SOFC, the method comprising the following steps: Constructing a combined heat and power system framework based on SOFC, wherein the combined heat and power system framework includes an air compression mechanism, a hydrogen compression mechanism, an SOFC, a burner, an electric power output mechanism, a hot water supply mechanism, and a cold supply mechanism, wherein the air compression mechanism and the hydrogen compression mechanism are respectively connected to the SOFC, the SOFC is connected to the burner, the hot water supply mechanism and the cold supply mechanism are respectively connected to the burner, and the electric power output mechanism is connected to the burner; Constructing a SOFC energy sub-model, wherein the SOFC energy sub-model is used to determine the SOFC output electrical power, the SOFC output thermal power and the SOFC inlet and outlet gas thermal power based on the electrochemical parameters of the SOFC; Constructing a SOFC mixed gas component quantification sub-model, wherein the SOFC mixed gas component quantification sub-model is used to determine the SOFC mixed gas outlet component quantification parameters based on the SOFC inlet mixed gas component ratio; Constructing a SOFC tail exhaust mixed gas temperature quantification sub-model, wherein the SOFC tail exhaust mixed gas temperature quantification sub-model is used to determine the SOFC tail exhaust mixed gas temperature based on the SOFC output thermal power, the SOFC inlet and outlet gas thermal power and the space loss heat energy; Constructing a burner mixed gas component quantification sub-model, wherein the burner mixed gas component quantification sub-model is used to determine the burner inlet mixed gas specific heat capacity based on the SOFC mixed gas outlet component quantification parameter and the burner inlet gas mass flow rate, determine the burner outlet mixed gas component quantification parameter based on the SOFC mixed gas outlet component quantification parameter, and determine the burner outlet mixed gas specific heat capacity based on the burner outlet mixed gas component quantification parameter; A burner mixed gas temperature quantification submodel is constructed, wherein the burner mixed gas temperature quantification submodel is used to determine the burner tail exhaust mixed gas temperature based on the burner inlet mixed gas specific heat capacity and the burner outlet mixed gas specific heat capacity.

[0006] In the embodiments of the present application, a SOFC energy sub-model, a SOFC mixed gas component quantification sub-model, a SOFC tail exhaust mixed gas temperature quantification sub-model, a burner mixed gas component quantification sub-model and a burner mixed gas temperature quantification sub-model are constructed for the SOFC-based combined heat and power system framework, so as to achieve modeling and quantification of the components, temperature and thermal energy of the fuel cell tail exhaust high-temperature mixed gas, and provide a judgment basis for predicting the performance of the CCHP system.

[0007] In a possible implementation, the electrochemical parameters of the SOFC include: SOFC single-chip voltage, SOFC voltage decay rate, SOFC total output current, SOFC active area, SOFC single-chip number, anode inlet gas specific heat capacity, anode inlet gas mass flow rate, anode inlet gas temperature, cathode inlet gas specific heat capacity, cathode inlet gas mass flow rate, cathode inlet gas temperature, anode outlet gas specific heat capacity, anode outlet gas mass flow rate, anode outlet gas temperature, cathode outlet gas specific heat capacity, cathode outlet gas mass flow rate and cathode outlet gas temperature; The SOFC output power is determined by the SOFC effective single-chip voltage, the SOFC total output current, the SOFC active area and the number of SOFC single chips, and the SOFC effective single-chip voltage is determined by the SOFC single-chip voltage, the SOFC voltage decay rate and the SOFC operation time; The SOFC output thermal power is determined by the hydrogen enthalpy, the SOFC effective single-chip voltage, the SOFC total output current, the SOFC active area and the number of SOFC single chips; The SOFC inlet and outlet gas thermal power includes: anode inlet thermal power, cathode inlet thermal power, anode outlet thermal power and cathode outlet thermal power; The anode inlet gas thermal power is determined by the anode inlet gas specific heat capacity, the anode inlet gas mass flow rate and the anode inlet gas temperature; The cathode inlet gas thermal power is determined by the cathode inlet gas specific heat capacity, the cathode inlet gas mass flow rate and the cathode inlet gas temperature; The anode outlet gas thermal power is determined by the anode outlet gas specific heat capacity, the anode outlet gas mass flow rate and the anode outlet gas temperature; The cathode outlet gas thermal power is determined by the cathode outlet gas specific heat capacity, the cathode outlet gas mass flow rate and the cathode outlet gas temperature.

[0008] In a possible implementation, before building the SOFC energy sub-model, it also includes: Construct SOFC electrochemical sub-model and SOFC performance decay sub-model; Wherein, the SOFC electrochemical sub-model is used to determine the SOFC single-chip voltage based on the Nernst voltage, SOFC activation polarization, SOFC ohmic polarization and SOFC concentration polarization; The SOFC performance decay sub-model is used to determine the SOFC voltage decay rate based on the hydrogen mass component ratio and the SOFC output current density.

[0009] In a possible implementation, determining the tail exhaust mixed gas temperature of the SOFC based on the SOFC output thermal power, the SOFC inlet and outlet gas thermal power and space loss heat energy includes: The SOFC output thermal power, the SOFC inlet and outlet gas thermal power and the space loss heat energy are processed based on the least square method to obtain the tail exhaust mixed gas temperature of the SOFC.

[0010] In a possible implementation, the quantitative parameters of the SOFC mixed gas outlet components include: anode outlet gas mass flow rate, anode outlet gas hydrogen mass ratio, anode outlet gas water vapor mass ratio, cathode outlet gas mass flow rate, cathode outlet gas oxygen mass ratio, cathode outlet gas nitrogen mass ratio, cathode outlet gas water vapor mass ratio.

[0011] In a possible implementation, the quantitative parameters of the mixed gas components at the burner outlet include: a mass proportion of oxygen at the burner outlet, a mass proportion of nitrogen at the burner outlet, and a mass proportion of water vapor at the burner outlet.

[0012] In a possible implementation, the method further includes: The design parameter values ​​of the air compression mechanism, the hydrogen compression mechanism, the hot water supply mechanism and the cold supply mechanism in the combined cooling, heating and power system framework are set.

[0013] In a second aspect, an embodiment of the present application provides a modeling device for a combined heat and power system based on SOFC, the device comprising: The first construction module is used to construct a combined heat and power system framework based on SOFC, wherein the combined heat and power system framework includes an air compression mechanism, a hydrogen compression mechanism, an SOFC, a burner, an electric power output mechanism, a hot water supply mechanism and a cold supply mechanism, wherein the air compression mechanism and the hydrogen compression mechanism are respectively connected to the SOFC, the SOFC is connected to the burner, the hot water supply mechanism and the cold supply mechanism are respectively connected to the burner, and the electric power output mechanism is connected to the burner; A second construction module is used to construct a SOFC energy sub-model, wherein the SOFC energy sub-model is used to determine the SOFC output electric power, the SOFC output thermal power and the SOFC inlet and outlet gas thermal power based on the electrochemical parameters of the SOFC; A third construction module is used to construct a SOFC mixed gas component quantification sub-model, wherein the SOFC mixed gas component quantification sub-model is used to determine the SOFC mixed gas outlet component quantification parameters based on the SOFC inlet mixed gas component ratio; A fourth construction module is used to construct a SOFC tail exhaust mixed gas temperature quantification sub-model, wherein the SOFC tail exhaust mixed gas temperature quantification sub-model is used to determine the tail exhaust mixed gas temperature of the SOFC based on the SOFC output thermal power, the SOFC inlet and outlet gas thermal power and the space loss heat energy; A fifth construction module is used to construct a burner mixed gas component quantification sub-model, wherein the burner mixed gas component quantification sub-model is used to determine the burner inlet mixed gas specific heat capacity based on the SOFC mixed gas outlet component quantification parameter and the burner inlet gas mass flow rate, determine the burner outlet mixed gas component quantification parameter based on the SOFC mixed gas outlet component quantification parameter, and determine the burner outlet mixed gas specific heat capacity based on the burner outlet mixed gas component quantification parameter; The sixth construction module is used to construct a burner mixed gas temperature quantification sub-model, wherein the burner mixed gas temperature quantification sub-model is used to determine the burner tail exhaust mixed gas temperature based on the burner inlet mixed gas specific heat capacity and the burner outlet mixed gas specific heat capacity.

[0014] In a third aspect, an embodiment of the present application provides an electronic device, including: Memory, used to store programs; A processor is used to execute the program stored in the memory. When the processor executes the program stored in the memory, the processor is used to execute the method described in the first aspect above.

[0015] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to execute the modeling method of the SOFC-based combined heat and power system as described in the first aspect above.

[0016] The solutions provided in the second to fourth aspects are used to implement or cooperate with the modeling method of the SOFC-based combined heat and power system provided in the first aspect, and can therefore achieve the same or corresponding beneficial effects as the first aspect, and will not be repeated here.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic flow chart of a modeling method for a combined cooling, heating and power system based on SOFC provided in the first embodiment of the present application; Figure 2 A schematic diagram of a combined cooling, heating and power system framework based on SOFC provided in an embodiment of the present application; Figure 3 A schematic flow chart of a modeling method for a combined cooling, heating and power system based on SOFC provided in the second embodiment of the present application; Figure 4 A schematic diagram of parameter calibration of a SOFC model provided in an embodiment of the present application; Figure 5 A visualization diagram of the quantification of the SOFC and burner outlet gas temperature provided in an embodiment of the present application; Figure 6 A visualization diagram quantifying the mass ratio of SOFC tail gas components provided in an embodiment of the present application; Figure 7 A visualization diagram quantifying the mass proportions of the burner exhaust gas components provided in an embodiment of the present application.

[0019] Figure 8 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical methods and advantages of this application more clear, the following is a further detailed description of this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain this application and are not used to limit this application.

[0021] It should be noted that the meaning of "multiple" (or multiple) involved in the description of the embodiments of the present application is more than two, "greater than", "less than", "exceed", etc. are understood as not including the number itself, and "above", "below", "within", etc. are understood as including the number itself. If there is a description of "first", "second", etc., it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0022] In the embodiments of the present application, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the situation where A exists alone, A and B exist at the same time, and B exists alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b and c can mean: a exists alone, b exists alone, c exists alone, a and b exist at the same time, a and c exist at the same time, b and c exist at the same time, or a, b and c exist at the same time, wherein a, b, c can be single or multiple.

[0023] The terms "substantially", "about" and similar terms used in the embodiments of the present application are used as approximate terms rather than as terms of degree, and are intended to take into account the inherent deviations of measurements or calculations known to those of ordinary skill in the art. In addition, the use of "may" when describing the embodiments of the present application refers to "possible one or more embodiments". The terms "use", "using", and "used" used in the embodiments of the present application may be considered to be synonymous with the terms "utilize", "utilizing", and "utilized", respectively. In addition, the term "exemplary" is intended to refer to an example or illustration.

[0024] See also Figure 1 , is a flow chart of a modeling method for a combined heat and power system based on SOFC provided in the first embodiment of the present application, the method comprising the following steps: Step S101: construct a combined heat, cooling and power system framework based on SOFC, wherein the combined heat, cooling and power system framework includes an air compression mechanism, a hydrogen compression mechanism, a SOFC, a burner, an electric power output mechanism, a hot water supply mechanism and a cold supply mechanism, the air compression mechanism and the hydrogen compression mechanism are respectively connected to the SOFC, the SOFC is connected to the burner, the hot water supply mechanism and the cold supply mechanism are respectively connected to the burner, and the electric power output mechanism is connected to the burner.

[0025] Specifically, the air compression mechanism and the hydrogen compression mechanism are used to provide the SOFC with a heated air flow and a heated hydrogen flow, respectively. The air and oxygen react electrochemically in the SOFC to generate electrical energy and heat energy. The electrical energy output from the SOFC is supplied to the electrical equipment through the electric power output mechanism. The excess hydrogen heated by the electrochemical reaction enters the burner with the air for full mixing and combustion to further increase the temperature. The tail exhaust high-temperature mixed gas discharged from the burner can be transported to the hot water supply mechanism for heating hot water; it can also be transported to the cold supply mechanism for heat exchange, so as to use the heat of the tail exhaust high-temperature mixed gas to heat the water. The heated water can be transported to the hot water supply mechanism, and the tail exhaust high-temperature mixed gas becomes a low-temperature gas after heat exchange, which can generate cold energy.

[0026] For example, a solid oxide fuel cell combined heating and power system model framework can be designed and constructed on the TRNSYS simulation platform.

[0027] See also Figure 2, which is a schematic diagram of a SOFC-based combined cooling, heating and power system framework provided in an embodiment of the present application. The framework includes photovoltaic panels, energy storage batteries, DC / DC inverters, DC / AC inverters, electrolyzers, hydrogen compressors, air compressors, hydrogen storage tanks, gas heat exchangers, gas electric heaters, solid oxide fuel cell stacks (SOFCs), burners, gas-liquid heat exchangers, water pumps, hot water storage tanks, water flow separators, water flow mixers, liquid electric heaters, absorption chillers, cooling coils, fans and other components.

[0028] Figure 2 In the combined heat and power system framework shown, the air compressor, and the gas heat exchanger and gas electric heater connected to the air compressor in sequence belong to the air compression mechanism; the hydrogen compressor, the hydrogen storage tank, and the gas heat exchanger and gas electric heater connected to the hydrogen storage tank in sequence belong to the hydrogen compression mechanism, and the DC / AC inverter belongs to the electric power output mechanism; the hot water storage tank, the water flow separator, the water flow mixer, and the liquid electric heater belong to the hot water supply mechanism; the absorption chiller, the cooling coil, and the fan belong to the cold supply mechanism.

[0029] Figure 2 The working process of the combined cooling, heating and power system framework shown is as follows: Photovoltaic panels generate electricity under the action of solar energy. On the one hand, the electricity is stored in the energy storage battery (path 1). On the other hand, the electricity is transmitted to the electrolyzer (path 2) through the DC / DC inverter for electrolytic hydrogen production. The generated hydrogen is compressed by the hydrogen compressor (path 3) and stored in the hydrogen storage tank (path 4). The air compressor and the hydrogen storage tank provide air flow and hydrogen flow respectively, and the gas is heated by the gas exchanger and the gas electric heater (path 5, 6, 7 and path 8, 9, 10), and sent to the solid oxide fuel cell stack for electrochemical reaction to generate electricity and heat energy. The excess hydrogen and air heated by the electrochemical reaction enter the burner (path 11 and path 12) for full mixing and combustion to further increase the temperature. The tail exhaust high-temperature mixed gas discharged from the burner passes through the cathode gas heat exchanger (path 13) and the anode gas heat exchanger (path 14) to preheat the air and hydrogen entering the stack. Under the demand for hot water supply in the building, the tail high-temperature mixed gas will pass through paths 18 and 19 (the valve of path 16 is closed), flow through the gas-liquid heat exchanger, and then be discharged from the system from path 20. The domestic water in the hot water storage tank forms a water cycle between the gas-liquid heat exchanger and the hot water storage tank through a water pump (paths 21 and 22), replacing the heat in the tail high-temperature mixed gas and storing it in the hot water storage tank. After the city tap water enters the system (path 23), it is separated by the water flow separator, part of which flows through the hot water storage tank for heating (paths 24 and 25), and is mixed with the other part of the water flow (path 26) in the water flow mixer, and then further heated by the fluid electric heater (path 27) and sent to the building. Under the demand for cold supply in summer, the tail high-temperature gas passes through paths 15 and 16 (the valve of path 18 is closed), and transfers the heat to the water cycle of the absorption chiller in the gas-liquid heat exchanger (paths 28, 29, and 30), and then participates in the heating process of the hot water storage tank through paths 17 and 19. The absorption chiller, heated by the water circulation, generates cold energy, and the working fluid is sent to the cooling pipe for circulation through the water pump (paths 31 and 32). The fan sends air from the atmosphere into the cooling coil to exchange heat with the working fluid to reduce the temperature of the air flow (paths 33 and 34). The air discharged from the cooling coil is then heated by the gas electric heater to reach the required temperature and humidity, and then sent into the building (paths 35 and 36). In addition, the electricity generated by the solid oxide fuel cell is coupled with the electricity output by the energy storage battery to provide electricity for the operation of its own components and the building (paths 37 and 38).

[0030] Step S102: constructing a SOFC energy sub-model, wherein the SOFC energy sub-model is used to determine the SOFC output electrical power, the SOFC output thermal power and the SOFC inlet and outlet gas thermal power based on the electrochemical parameters of the SOFC.

[0031] Exemplarily, the electrochemical parameters of SOFC include: SOFC single-cell voltage, SOFC voltage decay rate, SOFC total output current, SOFC active area, number of SOFC single-cells, anode inlet gas specific heat capacity, anode inlet gas mass flow rate, anode inlet gas temperature, cathode inlet gas specific heat capacity, cathode inlet gas mass flow rate, cathode inlet gas temperature, anode outlet gas specific heat capacity, anode outlet gas mass flow rate, anode outlet gas temperature, cathode outlet gas specific heat capacity, cathode outlet gas mass flow rate and cathode outlet gas temperature.

[0032] Exemplarily, the SOFC output power is determined by the SOFC effective single-chip voltage, the SOFC output total current, the SOFC active area and the number of SOFC single chips. The SOFC output power can be used to evaluate the power output of the CCHP system.

[0033] Exemplarily, the SOFC effective cell voltage is determined by the SOFC cell voltage, the SOFC voltage decay rate, and the SOFC operating time.

[0034] Exemplarily, the SOFC output thermal power is determined by the hydrogen enthalpy, the SOFC effective single-chip voltage, the SOFC total output current, the SOFC active area and the number of SOFC single chips.

[0035] Exemplarily, the SOFC inlet and outlet gas thermal powers include: anode inlet thermal power, cathode inlet thermal power, anode outlet thermal power and cathode outlet thermal power.

[0036] Exemplarily, the anode inlet gas thermal power is determined by the anode inlet gas specific heat capacity, the anode inlet gas mass flow rate, and the anode inlet gas temperature.

[0037] Exemplarily, the cathode inlet gas thermal power is determined by the cathode inlet gas specific heat capacity, the cathode inlet gas mass flow rate and the cathode inlet gas temperature.

[0038] Exemplarily, the anode outlet gas thermal power is determined by the anode outlet gas specific heat capacity, the anode outlet gas mass flow rate, and the anode outlet gas temperature.

[0039] Exemplarily, the cathode outlet gas thermal power is determined by the cathode outlet gas specific heat capacity, the cathode outlet gas mass flow rate and the cathode outlet gas temperature.

[0040] It should be noted that the inlet and outlet of SOFC include an anode gas inlet, a cathode gas inlet, an anode gas outlet, and a cathode gas outlet. The anode gas inlet and the anode gas outlet are the gas inlet and gas outlet of hydrogen respectively, and the cathode gas inlet and the cathode gas outlet are the gas inlet and gas outlet of air respectively.

[0041] Step S103: constructing a SOFC mixed gas component quantification sub-model, wherein the SOFC mixed gas component quantification sub-model is used to determine the SOFC mixed gas outlet component quantification parameters based on the SOFC inlet mixed gas component ratio.

[0042] Exemplarily, the proportions of the components of the intake mixed gas include the mass proportion of the anode intake hydrogen, the mass proportion of the anode intake water vapor, the mass proportion of the cathode intake oxygen, the mass proportion of the cathode intake nitrogen and the mass proportion of the cathode intake water vapor.

[0043] Exemplarily, the quantitative parameters of the SOFC mixed gas outlet components include: anode outlet gas mass flow rate, anode outlet gas hydrogen mass ratio, anode outlet gas water vapor mass ratio, cathode outlet gas mass flow rate, cathode outlet gas oxygen mass ratio, cathode outlet gas nitrogen mass ratio, cathode outlet gas water vapor mass ratio.

[0044] Among them, the mass proportion of hydrogen at the anode outlet is determined based on the mass proportion of hydrogen at the anode inlet, the mass proportion of water vapor at the anode outlet is determined based on the mass proportion of water vapor at the anode inlet, the anode outlet mass flow rate is determined based on the anode inlet mass flow rate, and the anode inlet mass flow rate is determined based on the mass proportion of hydrogen at the anode inlet.

[0045] The mass proportion of oxygen at the cathode outlet is determined based on the mass proportion of oxygen at the cathode inlet, the mass proportion of nitrogen at the cathode outlet is determined based on the mass proportion of nitrogen at the cathode inlet, the mass proportion of water vapor at the cathode inlet is determined based on the mass proportion of water vapor at the cathode inlet, the cathode outlet mass flow rate is determined based on the cathode inlet mass flow rate, and the cathode inlet mass flow rate is determined based on the mass proportion of oxygen at the cathode inlet.

[0046] Step S104: constructing a SOFC tail exhaust mixed gas temperature quantification sub-model, wherein the SOFC tail exhaust mixed gas temperature quantification sub-model is used to determine the SOFC tail exhaust mixed gas temperature based on the SOFC output thermal power, the SOFC inlet and outlet gas thermal power and the space loss heat energy.

[0047] Exemplarily, the SOFC output thermal power, the SOFC inlet and outlet gas thermal power and the space loss heat energy may be processed based on the least square method to obtain the tail exhaust mixed gas temperature of the SOFC.

[0048] Step S105: construct a burner mixed gas component quantification sub-model, wherein the burner mixed gas component quantification sub-model is used to determine the burner inlet mixed gas specific heat capacity based on the SOFC mixed gas outlet component quantification parameters and the burner inlet mass flow rate, determine the burner outlet mixed gas component quantification parameters based on the SOFC mixed gas outlet component quantification parameters, and determine the burner outlet mixed gas specific heat capacity based on the burner outlet mixed gas component quantification parameters.

[0049] Exemplarily, the quantitative parameters of the mixed gas components at the burner outlet include: the mass proportion of oxygen at the burner outlet, the mass proportion of nitrogen at the burner outlet, and the mass proportion of water vapor at the burner outlet.

[0050] Among them, the mass proportion of oxygen at the burner outlet is determined based on the mass proportion of oxygen at the cathode outlet and the mass consumption rate of hydrogen in the burner, the mass proportion of water vapor at the burner outlet is determined based on the mass proportion of water vapor at the anode outlet, the mass proportion of water vapor at the cathode outlet and the mass consumption rate of hydrogen in the burner, and the mass proportion of nitrogen at the burner outlet is determined based on the mass proportion of oxygen at the burner outlet and the mass proportion of water vapor at the burner outlet.

[0051] Step S106: construct a burner mixed gas temperature quantification sub-model, wherein the burner mixed gas temperature quantification sub-model is used to determine the burner tail exhaust mixed gas temperature based on the burner inlet mixed gas specific heat capacity and the burner outlet mixed gas specific heat capacity.

[0052] In some possible embodiments of the present application, before constructing the SOFC energy sub-model, the following is also performed: constructing a SOFC electrochemical sub-model and a SOFC performance decay sub-model; wherein the SOFC electrochemical sub-model is used to determine the SOFC single-chip voltage based on the Nernst voltage, SOFC activation polarization, SOFC ohmic polarization and SOFC concentration polarization; and the SOFC performance decay sub-model is used to determine the SOFC voltage decay rate based on the hydrogen mass component ratio and the SOFC output current density.

[0053] In a possible implementation, the modeling method further includes: setting design parameter values ​​of an air compression mechanism, a hydrogen compression mechanism, a hot water supply mechanism, and a cold supply mechanism in the framework of the combined heat and power system.

[0054] See also Figure 3 , is a flow chart of a modeling method for a combined heat and power system based on SOFC provided in a second embodiment of the present application, the method comprising the following steps: Step S201: Design and construct a solid oxide fuel cell (SOFC) combined cooling, heating and power (CCHP) system model framework model on the TRNSYS simulation platform.

[0055] It should be noted that the implementation of step S201 may refer to the relevant description of the previous step S101, which will not be repeated here.

[0056] Step S202: Constructing a SOFC electrochemical model and a SOFC performance degradation sub-model. For the specific process, refer to the introduction of the following steps S202.1 and S202.2.

[0057] Step S202.1: constructing a SOFC electrochemical model, including calculating the SOFC single-chip voltage. The expression of the SOFC single-chip voltage is: (Formula 1) in E SOFC is the SOFC single chip voltage,E ner for Nernst voltage, E SOFC,act is the SOFC activation polarization, E SOFC,ohm is the ohmic polarization of SOFC, E SOFC,co It is the concentration polarization of SOFC.

[0058] The expression of Nernst voltage is: (Formula 2) in is the local partial pressure of hydrogen, is the local partial pressure of oxygen, is the partial pressure of water vapor, R is the ideal gas constant, 8.315 J / (mol·K), T is the SOFC operating temperature, and F is the Faraday constant, 96485 C / mol.

[0059] The expression of SOFC activation polarization is: (Formula 3) in T SOFC is the SOFC operating temperature, is the SOFC output current density, is the SOFC anode current exchange density, is the SOFC cathode exchange current density.

[0060] The expression of SOFC ohmic polarization is: (Formula 4) Where ISOFC is the total output current of SOFC, d a , d c , d ele , d int are the thickness of SOFC anode, cathode, ion membrane and connecting layer, κ a , κ c , κ ele , κ int It is the electrical conductivity of SOFC anode, cathode, ion membrane and connecting layer.

[0061] The expression of SOFC concentration polarization is: (Formula 5) in , , are the limiting current densities of hydrogen, oxygen and water vapor, respectively.

[0062] Step S202.2: Construct a SOFC performance degradation sub-model.

[0063] The expression of SOFC voltage decay rate is: (Formula 6) in ρ is the SOFC voltage decay rate, is the mass fraction of hydrogen.

[0064] Step S203: construct the energy sub-model of SOFC, the component quantification sub-model of the mixed gas, and the temperature quantification sub-model of the tail gas. For the specific process, please refer to the introduction of the following steps S203.1, S203.2 and S203.3.

[0065] Step S203.1: constructing a SOFC energy sub-model, including calculating the output electrical power, output thermal power, anode gas inlet thermal power, cathode gas inlet thermal power, anode gas outlet thermal power and cathode gas outlet thermal power of the SOFC.

[0066] The expression of SOFC output power is: (Formula 7) in P e Output electrical power for SOFC, is the SOFC effective single-chip voltage, A SOFC is the SOFC active area, N SOFC is the number of SOFC cells.

[0067] The effective single-cell voltage of SOFC can be calculated as: (Formula 8) in t is the operating time of SOFC.

[0068] The expression of SOFC output thermal power is: (Formula 9) in P th is the thermal power output of SOFC, is the enthalpy of hydrogen, 2.42×10 5 J / mol, n is the number of electrons carried by a single hydrogen molecule, 2.

[0069] The expression of SOFC anode inlet heat power is: (Formula 10) in is the anode inlet heat power, is the anode inlet specific heat capacity, is the anode inlet gas mass flow rate, is the anode inlet temperature.

[0070] The expression of SOFC cathode inlet heat power is: (Formula 11) in is the cathode inlet heat power, is the cathode inlet specific heat capacity, is the cathode gas mass flow rate, is the cathode inlet temperature.

[0071] The expression of SOFC anode outlet heat power is: (Formula 12) in is the anode outlet heat power, is the specific heat capacity of the anode outlet gas, is the anode outlet gas mass flow rate, is the anode outlet temperature.

[0072] The expression of SOFC cathode outlet thermal power is: (Formula 13) in is the cathode outlet heat power, is the cathode outlet heat power, is the cathode outlet gas mass flow rate, is the cathode outlet temperature.

[0073] Step S203.2: Constructing a SOFC mixed gas component model, including calculating anode inlet gas specific heat capacity, anode inlet gas hydrogen mass ratio, anode inlet gas water vapor mass ratio, anode inlet gas mass flow rate, cathode inlet gas specific heat capacity, cathode inlet gas oxygen mass ratio, cathode inlet gas nitrogen mass ratio, cathode inlet gas water vapor mass ratio, anode outlet gas mass flow rate, anode outlet gas specific heat capacity, anode outlet gas hydrogen mass ratio, anode outlet gas water vapor mass ratio, cathode outlet gas mass flow rate, cathode outlet gas specific heat capacity, cathode outlet gas oxygen mass ratio, cathode outlet gas water vapor mass ratio, cathode outlet gas nitrogen mass ratio.

[0074] The expression of the anode inlet specific heat capacity is: (Formula 14) in is the mass ratio of hydrogen gas entering the anode, is the specific heat capacity of hydrogen, 1.43×10 4 J / (kg·K), is the mass ratio of water vapor entering the anode, is the specific heat capacity of water vapor, 1.85×10 3 J / (kg·K).

[0075] The expression of the mass ratio of hydrogen gas entering the anode is: (Formula 15) in is the molar mass of hydrogen, 0.002 kg / mol, is the molar mass of water, 0.018 kg / mol, The volume ratio of hydrogen gas entering the anode is is the volume ratio of water vapor in the anode inlet gas.

[0076] The expression of the mass ratio of water vapor entering the anode is: (Formula 16) The anode inlet gas mass flow rate can be calculated as: (Formula 17) in α a is the anode stoichiometric ratio, is the number of electrons carried by a hydrogen molecule, 2.

[0077] The expression of cathode inlet specific heat capacity is: (Formula 18) in is the mass ratio of oxygen entering the cathode, is the mass ratio of nitrogen gas entering the cathode, is the mass ratio of water vapor entering the cathode, is the specific heat capacity of oxygen, 909 J / (kg·K), is the specific heat capacity of nitrogen, 1038 J / (kg·K).

[0078] The expression of the mass proportion of oxygen entering the cathode is: (Formula 19) in is the molar mass of oxygen, 0.018 kg / mol, is the molar mass of nitrogen, 0.028 kg / mol, is the volume ratio of oxygen entering the cathode, is the volume ratio of nitrogen gas entering the cathode, is the volume percentage of water vapor in the cathode air.

[0079] The expression of the mass ratio of nitrogen gas entering the cathode is: (Formula 20) The expression of the cathode inlet water vapor mass ratio is: (Formula 21) The expression of cathode gas mass flow rate is: (Formula 22) in α c is the cathode stoichiometric ratio, The number of electrons carried by the oxygen molecule is 4.

[0080] The expression of anode outlet gas mass flow rate is: (Formula 23) The expression of the specific heat capacity of the anode outlet gas is: (Formula 24) in is the mass ratio of hydrogen gas discharged from the anode, is the mass proportion of water vapor in the anode outlet gas.

[0081] The expression of the mass ratio of hydrogen gas at the anode outlet is: (Formula 25) The expression of the mass proportion of water vapor at the anode outlet is: (Formula 26) The expression of cathode outlet gas mass flow rate is: (Formula 27) The expression of cathode outlet specific heat capacity is: (Formula 28) in is the mass ratio of oxygen in cathode outlet gas, is the mass proportion of cathode outlet nitrogen, is the mass proportion of water vapor in cathode outlet gas.

[0082] The expression of the oxygen mass ratio of cathode outlet gas is: (Formula 29) The expression of the cathode outlet water vapor mass ratio is: (Formula 30) The expression of the mass proportion of cathode outlet nitrogen is: (Formula 31) Step S203.3: Construct a quantification sub-model for the SOFC tail gas temperature, the expression is: (Formula 32) in is the temperature of the SOFC tail exhaust mixed gas, and Pth,loss is the space loss heat energy, which can be calculated as: (Formula 33) in h is the convective heat transfer coefficient, 9 W / (m2·K), S is the surface area of ​​SOFC in contact with air, σ is the Stefan-Boltzmann constant of 5.67×10 -8 W / (m 2 ·K 4 ), γ is the SOFC surface emissivity, 0.5, T am is the ambient temperature, 298.15 K.

[0083] FSOLVE is a solution formula for nonlinear equations based on the least squares method, which can be expressed as: (Formula 34) (Formula 35) Step S204: Calibrate the SOFC model based on the SOFC experimental data. Figure 4 , is a schematic diagram of parameter calibration of a SOFC model provided in an embodiment of the present application, in which the corresponding relationship between the single-chip voltage and current density of the SOFC is calibrated under different temperature conditions.

[0084] Step S205: construct a quantified sub-model of the mixed gas components and a quantified sub-model of the exhaust gas temperature of the burner. For the specific process, see the introduction of the following steps S205.1 and S205.2.

[0085] Step S205.1: construct a component quantification sub-model of the burner mixed gas, including calculating the specific heat capacity of the burner's inlet mixed gas, the specific heat capacity of the burner's outlet mixed gas, the burner's outlet oxygen mass ratio, the burner's outlet nitrogen mass ratio, and the burner's outlet water vapor mass ratio.

[0086] The expression of the specific heat capacity of the inlet mixed gas of the burner is: (Formula 36) in is the burner inlet air mass flow rate.

[0087] The expression of the specific heat capacity of the burner outlet mixed gas is: (Formula 37) in is the mass ratio of oxygen in the burner exhaust gas, is the mass proportion of nitrogen gas at the burner outlet, is the mass percentage of water vapor in the burner outlet gas.

[0088] The expression of the oxygen mass ratio of the burner outlet gas is: (Formula 38) in is the mass consumption rate of hydrogen in the burner.

[0089] The expression of the mass proportion of water vapor in the burner outlet gas is: (Formula 39) The expression of the mass proportion of nitrogen in the burner outlet gas is: (Formula 40) Step S205.2: construct a burner tail gas temperature quantification sub-model, including calculating the burner outlet gas temperature.

[0090] The expression of burner outlet temperature is: (Formula 41) Step S206. According to the specific service conditions of SOFC and burner, set the design parameter values ​​of key auxiliary components of the combined heat and power system in TRNSYS software, including photovoltaic panels, hydrogen storage tanks, hydrogen compressors, air compressors, inverters, gas / gas-liquid heat exchangers, gas electric heaters, hot water storage tanks, air electric heaters, and absorption chillers, as shown in Table 1 below.

[0091] Table 1

[0092] As an optional embodiment, the relevant quantitative data can be visualized based on the constructed SOFC and burner mixed gas component quantitative sub-model and SOFC and burner mixed gas temperature quantitative sub-model, such as Figure 5 The SOFC and burner outlet gas temperature quantification visualization diagram is shown in Figure 6 The visualization diagram of the quantification of the mass ratio of the SOFC tail gas components shown in Figure 7 The figure shows a visualization of the quantification of the mass ratio of the exhaust gas components from the burner.

[0093] Exemplarily, the modeling method of the combined heat and power system based on SOFC provided in the embodiment of the present application can be applied to a terminal, can also be applied to a server, and can also be software running in a terminal or a server. In some embodiments, the terminal can be a smart phone, a tablet computer, a laptop computer, a desktop computer, etc.; the server can be configured as an independent physical server, or a server cluster or a distributed system composed of multiple physical servers, and can also be configured as a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery networks (Content Delivery Network, CDN) and big data and artificial intelligence platforms; the software can be an application that implements the modeling method of the combined heat and power system based on SOFC, etc., but is not limited to the above forms.

[0094] Exemplarily, the embodiments of the present application can be used in many general or special computer system environments or configurations. For example: personal computers, server computers, handheld devices or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronic devices, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc. The present application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application can also be practiced in distributed computing environments, in which tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media including storage devices.

[0095] The embodiment of the present application also provides a modeling device for a combined cooling, heating and power system based on SOFC, the device comprising: The first construction module is used to construct a combined heat and power system framework based on SOFC, wherein the combined heat and power system framework includes an air compression mechanism, a hydrogen compression mechanism, an SOFC, a burner, an electric power output mechanism, a hot water supply mechanism and a cold supply mechanism, wherein the air compression mechanism and the hydrogen compression mechanism are respectively connected to the SOFC, the SOFC is connected to the burner, the hot water supply mechanism and the cold supply mechanism are respectively connected to the burner, and the electric power output mechanism is connected to the burner; A second construction module is used to construct a SOFC energy sub-model, wherein the SOFC energy sub-model is used to determine the SOFC output electric power, the SOFC output thermal power and the SOFC inlet and outlet gas thermal power based on the electrochemical parameters of the SOFC; A third construction module is used to construct a SOFC mixed gas component quantification sub-model, wherein the SOFC mixed gas component quantification sub-model is used to determine the SOFC mixed gas outlet component quantification parameters based on the SOFC inlet mixed gas component ratio; A fourth construction module is used to construct a SOFC tail exhaust mixed gas temperature quantification sub-model, wherein the SOFC tail exhaust mixed gas temperature quantification sub-model is used to determine the tail exhaust mixed gas temperature of the SOFC based on the SOFC output thermal power, the SOFC inlet and outlet gas thermal power and the space loss heat energy; A fifth construction module is used to construct a burner mixed gas component quantification sub-model, wherein the burner mixed gas component quantification sub-model is used to determine the burner inlet mixed gas specific heat capacity based on the SOFC mixed gas outlet component quantification parameter and the burner inlet gas mass flow rate, determine the burner outlet mixed gas component quantification parameter based on the SOFC mixed gas outlet component quantification parameter, and determine the burner outlet mixed gas specific heat capacity based on the burner outlet mixed gas component quantification parameter; The sixth construction module is used to construct a burner mixed gas temperature quantification sub-model, wherein the burner mixed gas temperature quantification sub-model is used to determine the burner tail exhaust mixed gas temperature based on the burner inlet mixed gas specific heat capacity and the burner outlet mixed gas specific heat capacity.

[0096] It should be noted that the information interaction, execution process, etc. between the above-mentioned modules / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0097] See also Figure 8 The embodiment of the present application further provides an electronic device 300. The electronic device 300 may be a server or a terminal, and the internal structure of the electronic device 300 includes but is not limited to: A memory 310, used for storing programs; The processor 320 is used to execute the program stored in the memory 310. When the processor 320 executes the program stored in the memory 310, the processor 320 is used to execute the modeling method of the combined cooling, heating and power system based on SOFC as in any of the previous embodiments.

[0098] The processor 320 and the memory 310 may be connected via a bus or other means.

[0099] The memory 310 is a non-transient computer-readable storage medium that can be used to store non-transient software programs and non-transient computer executable programs, such as the modeling method of the combined cooling, heating and power system based on SOFC described in any embodiment of the present application. The processor 320 implements the modeling method of the combined cooling, heating and power system based on SOFC as described in any of the previous embodiments by running the non-transient software programs and instructions stored in the memory 310.

[0100] The memory 310 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and application programs required for at least one function; the data storage area may store and execute the modeling method of the above-mentioned SOFC-based combined heat and power system. In addition, the memory 310 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory 310 may optionally include a memory remotely arranged relative to the processor 320, and these remote memories may be connected to the processor 320 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0101] The non-transient software programs and instructions required to implement the above-mentioned SOFC-based combined heat and power system modeling method are stored in the memory 310. When executed by one or more processors 320, the SOFC-based combined heat and power system modeling method provided in any embodiment of the present application is executed.

[0102] The embodiment of the present application also provides a computer-readable storage medium storing computer-executable instructions, and the computer-executable instructions are used to execute the above-mentioned modeling method of the SOFC-based combined heat and power system.

[0103] In one embodiment, the storage medium stores computer executable instructions, which are executed by one or more control processors, for example, by one or more processors 320 in the above-mentioned electronic device 300, so that the above-mentioned one or more processors 320 can execute the modeling method of the SOFC-based combined heat and power system provided in any embodiment of the present application.

[0104] The above described embodiments are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0105] It will be appreciated by those skilled in the art that all or some of the steps and systems in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or transient medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically include computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0106] In addition, an embodiment of the present application further provides a computer program product, including a computer program, which, when executed by a processor, implements a modeling method for a combined heating, cooling and power system based on SOFC as in any of the previous embodiments.

[0107] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for the parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0108] It should also be understood that the various implementations provided in the embodiments of the present application can be combined arbitrarily to achieve different technical effects.

[0109] Finally, it should be noted that the embodiments described above are only specific implementation methods of the present application, which are used to illustrate the technical solution of the present application rather than to limit it. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that any technician familiar with this technical field can still modify the technical solution recorded in the aforementioned embodiments within the technical scope disclosed in the present application, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present application, and should all be covered by the protection scope of the present application.

Claims

1. A modeling method for a combined cooling, heating and power system based on SOFC, characterized in that: The method comprises the following steps: Constructing a combined heat and power system framework based on SOFC, wherein the combined heat and power system framework includes an air compression mechanism, a hydrogen compression mechanism, an SOFC, a burner, an electric power output mechanism, a hot water supply mechanism, and a cold supply mechanism, wherein the air compression mechanism and the hydrogen compression mechanism are respectively connected to the SOFC, the SOFC is connected to the burner, the hot water supply mechanism and the cold supply mechanism are respectively connected to the burner, and the electric power output mechanism is connected to the burner; Constructing a SOFC energy sub-model, wherein the SOFC energy sub-model is used to determine the SOFC output electrical power, the SOFC output thermal power and the SOFC inlet and outlet gas thermal power based on the electrochemical parameters of the SOFC; Constructing a SOFC mixed gas component quantification sub-model, wherein the SOFC mixed gas component quantification sub-model is used to determine the SOFC mixed gas outlet component quantification parameters based on the SOFC inlet mixed gas component ratio; Constructing a SOFC tail exhaust mixed gas temperature quantification sub-model, wherein the SOFC tail exhaust mixed gas temperature quantification sub-model is used to determine the SOFC tail exhaust mixed gas temperature based on the SOFC output thermal power, the SOFC inlet and outlet gas thermal power and the space loss heat energy; Constructing a burner mixed gas component quantification sub-model, wherein the burner mixed gas component quantification sub-model is used to determine the burner inlet mixed gas specific heat capacity based on the SOFC mixed gas outlet component quantification parameter and the burner inlet gas mass flow rate, determine the burner outlet mixed gas component quantification parameter based on the SOFC mixed gas outlet component quantification parameter, and determine the burner outlet mixed gas specific heat capacity based on the burner outlet mixed gas component quantification parameter; A burner mixed gas temperature quantification submodel is constructed, wherein the burner mixed gas temperature quantification submodel is used to determine the burner tail exhaust mixed gas temperature based on the burner inlet mixed gas specific heat capacity and the burner outlet mixed gas specific heat capacity.

2. The method according to claim 1, characterized in that The electrochemical parameters of the SOFC include: SOFC single-chip voltage, SOFC voltage decay rate, SOFC total output current, SOFC active area, number of SOFC single-chips, anode inlet gas specific heat capacity, anode inlet gas mass flow rate, anode inlet gas temperature, cathode inlet gas specific heat capacity, cathode inlet gas mass flow rate, cathode inlet gas temperature, anode outlet gas specific heat capacity, anode outlet gas mass flow rate, anode outlet gas temperature, cathode outlet gas specific heat capacity, cathode outlet gas mass flow rate and cathode outlet gas temperature; The SOFC output power is determined by the SOFC effective single-chip voltage, the SOFC total output current, the SOFC active area and the number of SOFC single chips, and the SOFC effective single-chip voltage is determined by the SOFC single-chip voltage, the SOFC voltage decay rate and the SOFC operation time; The SOFC output thermal power is determined by the hydrogen enthalpy, the SOFC effective single-chip voltage, the SOFC total output current, the SOFC active area and the number of SOFC single chips; The SOFC inlet and outlet gas thermal power includes: anode inlet thermal power, cathode inlet thermal power, anode outlet thermal power and cathode outlet thermal power; The anode inlet gas thermal power is determined by the anode inlet gas specific heat capacity, the anode inlet gas mass flow rate and the anode inlet gas temperature; The cathode inlet gas thermal power is determined by the cathode inlet gas specific heat capacity, the cathode inlet gas mass flow rate and the cathode inlet gas temperature; The anode outlet gas thermal power is determined by the anode outlet gas specific heat capacity, the anode outlet gas mass flow rate and the anode outlet gas temperature; The cathode outlet gas thermal power is determined by the cathode outlet gas specific heat capacity, the cathode outlet gas mass flow rate and the cathode outlet gas temperature.

3. The method according to claim 2, characterized in that Before building the SOFC energy sub-model, it also includes: Construct SOFC electrochemical sub-model and SOFC performance decay sub-model; Wherein, the SOFC electrochemical sub-model is used to determine the SOFC single-chip voltage based on the Nernst voltage, SOFC activation polarization, SOFC ohmic polarization and SOFC concentration polarization; The SOFC performance decay sub-model is used to determine the SOFC voltage decay rate based on the hydrogen mass component ratio and the SOFC output current density.

4. The method according to claim 2, characterized in that: The method of determining the tail exhaust mixed gas temperature of the SOFC based on the SOFC output thermal power, the SOFC inlet and outlet gas thermal power and space loss heat energy includes: processing the SOFC output thermal power, the SOFC inlet and outlet gas thermal power and space loss heat energy based on the least squares method to obtain the tail exhaust mixed gas temperature of the SOFC.

5. The method according to claim 1, characterized in that The quantitative parameters of the SOFC mixed gas outlet components include: anode outlet gas mass flow rate, anode outlet gas hydrogen mass ratio, anode outlet gas water vapor mass ratio, cathode outlet gas mass flow rate, cathode outlet gas oxygen mass ratio, cathode outlet gas nitrogen mass ratio, cathode outlet gas water vapor mass ratio.

6. The method according to claim 5, characterized in that The quantitative parameters of the mixed gas components at the burner outlet include: the mass proportion of oxygen at the burner outlet, the mass proportion of nitrogen at the burner outlet and the mass proportion of water vapor at the burner outlet.

7. The method according to claim 1, characterized in that The method further comprises: The design parameter values ​​of the air compression mechanism, the hydrogen compression mechanism, the hot water supply mechanism and the cold supply mechanism in the combined cooling, heating and power system framework are set.

8. A modeling device for a combined heat and power system based on SOFC, characterized in that: The device comprises: The first construction module is used to construct a combined heat and power system framework based on SOFC, wherein the combined heat and power system framework includes an air compression mechanism, a hydrogen compression mechanism, an SOFC, a burner, an electric power output mechanism, a hot water supply mechanism and a cold supply mechanism, wherein the air compression mechanism and the hydrogen compression mechanism are respectively connected to the SOFC, the SOFC is connected to the burner, the hot water supply mechanism and the cold supply mechanism are respectively connected to the burner, and the electric power output mechanism is connected to the burner; A second construction module is used to construct a SOFC energy sub-model, wherein the SOFC energy sub-model is used to determine the SOFC output electric power, the SOFC output thermal power and the SOFC inlet and outlet gas thermal power based on the electrochemical parameters of the SOFC; A third construction module is used to construct a SOFC mixed gas component quantification sub-model, wherein the SOFC mixed gas component quantification sub-model is used to determine the SOFC mixed gas outlet component quantification parameters based on the SOFC inlet mixed gas component ratio; A fourth construction module is used to construct a SOFC tail exhaust mixed gas temperature quantification sub-model, wherein the SOFC tail exhaust mixed gas temperature quantification sub-model is used to determine the tail exhaust mixed gas temperature of the SOFC based on the SOFC output thermal power, the SOFC inlet and outlet gas thermal power and the space loss heat energy; A fifth construction module is used to construct a burner mixed gas component quantification sub-model, wherein the burner mixed gas component quantification sub-model is used to determine the burner inlet mixed gas specific heat capacity based on the SOFC mixed gas outlet component quantification parameter and the burner inlet gas mass flow rate, determine the burner outlet mixed gas component quantification parameter based on the SOFC mixed gas outlet component quantification parameter, and determine the burner outlet mixed gas specific heat capacity based on the burner outlet mixed gas component quantification parameter; The sixth construction module is used to construct a burner mixed gas temperature quantification sub-model, wherein the burner mixed gas temperature quantification sub-model is used to determine the burner tail exhaust mixed gas temperature based on the burner inlet mixed gas specific heat capacity and the burner outlet mixed gas specific heat capacity.

9. An electronic device, characterized in that: include: Memory, used to store programs; A processor, configured to execute the program stored in the memory. When the processor executes the program stored in the memory, the processor is configured to execute: a method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: Computer executable instructions are stored, and the computer executable instructions are used to execute: the method according to any one of claims 1 to 7.

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