Modeling Method for SOFC-based Combined Cooling, Heating and Power Systems

Abstract

This application provides a modeling method for a SOFC-based combined cooling, heating, and power (CCHP) system, a multi-source data delay comparison device, an electronic device, and a computer-readable storage medium. The method includes: constructing an SOFC energy sub-model, an SOFC mixed gas composition quantification sub-model, an SOFC exhaust mixed gas temperature quantification sub-model, a burner mixed gas composition quantification sub-model, and a burner mixed gas temperature quantification sub-model for the SOFC-based CCHP system framework. This enables the modeling and quantification of the composition, temperature, and thermal energy of the high-temperature mixed gas at the fuel cell exhaust, providing a basis for predicting the performance of the CCHP system.

Description

Technical Field

[0001] This application relates to the field of combined cooling, heating and power (CCHP) systems, and more particularly to a modeling method, a modeling apparatus, an electronic device, and a computer-readable storage medium for a SOFC-based CCHP system. Background Technology

[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 cerium (SDC) solid oxide fuel cells (SOFCs) can convert hydrogen energy into electrical and thermal energy at operating temperatures of 500-800℃. When used in conjunction with heat exchangers, hot water storage tanks, and absorption chillers, they can cover the cooling, heating, and electricity needs of buildings. Therefore, SOFCs have been widely used in combined cooling, heating, and power (CCHP) systems for building energy supply, and have profound application prospects in promoting green and low-carbon building renovations.

[0003] As a core component of a CCHP system, the high-temperature exhaust gas from a SOFC needs to be mixed and burned within the burner to further increase its temperature. This mixture then simultaneously drives the exchange heating process for domestic hot water or building heating, as well as the heating process of the absorption chiller's generator, to supply both cooling and heating to the building. Therefore, quantifying the composition, temperature, and thermal energy of the high-temperature exhaust gas mixture from the SOFC is particularly important in system design and performance simulation prediction. However, current modeling and design of SOFC CCHP systems rarely consider highly accurate quantification of the exhaust gas mixture characteristics. Summary of the Invention

[0004] Therefore, it is necessary to provide a modeling method, a modeling device, an electronic device, and a computer-readable storage medium for a SOFC-based combined cooling, heating, and power system to address the aforementioned technical problems. This method is used to model and quantify the composition, temperature, and thermal energy of the high-temperature mixed gas in the fuel cell exhaust, providing a basis for predicting the performance of the CCHP system.

[0005] In a first aspect, embodiments of this application provide a modeling method for a SOFC-based combined cooling, heating and power system, the method comprising the following steps:

[0006] A combined cooling, heating, and power (CCHP) system framework based on SOFC is constructed. The CCHP 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 cooling 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 cooling supply mechanism are respectively connected to the burner. The electric power output mechanism is connected to the burner.

[0007] An SOFC energy sub-model is constructed, wherein the SOFC energy sub-model is used to determine the SOFC output electrical power, SOFC output thermal power, and SOFC inlet and outlet gas thermal power based on the electrochemical parameters of the SOFC;

[0008] A sub-model for quantifying the components of an SOFC mixed gas is constructed, wherein the sub-model is used to determine the quantification parameters of the SOFC mixed gas output components based on the proportion of the components in the SOFC inlet mixed gas.

[0009] A quantitative sub-model for SOFC exhaust gas temperature is constructed, wherein the SOFC exhaust gas temperature quantification sub-model is used to determine the SOFC exhaust gas temperature based on the SOFC output thermal power, the SOFC inlet and outlet gas thermal power, and the space loss thermal energy.

[0010] A sub-model for quantifying the composition of the burner mixed gas is constructed, wherein the sub-model is used to determine the specific heat capacity of the burner inlet mixed gas based on the quantification parameters of the SOFC mixed gas outlet composition and the burner inlet gas mass flow rate, to determine the quantification parameters of the burner outlet mixed gas composition based on the quantification parameters of the SOFC mixed gas outlet composition, and to determine the specific heat capacity of the burner outlet mixed gas based on the quantification parameters of the burner outlet mixed gas composition.

[0011] A quantification sub-model for burner mixed gas temperature is constructed, wherein the quantification sub-model for burner mixed gas temperature is used to determine the burner tail gas temperature based on the specific heat capacity of the inlet mixed gas and the specific heat capacity of the outlet mixed gas.

[0012] In this embodiment of the application, for the SOFC-based combined cooling, heating and power system framework, an SOFC energy sub-model, an SOFC mixed gas composition quantification sub-model, an SOFC exhaust mixed gas temperature quantification sub-model, a burner mixed gas composition quantification sub-model, and a burner mixed gas temperature quantification sub-model are constructed. This enables the modeling and quantification of the composition, temperature, and thermal energy of the high-temperature mixed gas at the fuel cell exhaust, providing a basis for predicting the performance of the CCHP system.

[0013] In one possible implementation, the electrochemical parameters of the SOFC include: SOFC single-cell voltage, SOFC voltage decay rate, SOFC total output current, SOFC active area, number of SOFC single cells, anode inlet specific heat capacity, anode inlet mass flow rate, anode inlet temperature, cathode inlet specific heat capacity, cathode inlet mass flow rate, cathode inlet temperature, anode outlet specific heat capacity, anode outlet mass flow rate, anode outlet temperature, cathode outlet specific heat capacity, cathode outlet mass flow rate, and cathode outlet temperature;

[0014] The SOFC output power is determined by the effective single-cell voltage of the SOFC, the total output current of the SOFC, the active area of ​​the SOFC, and the number of SOFC cells. The effective single-cell voltage of the SOFC is determined by the single-cell voltage of the SOFC, the SOFC voltage decay rate, and the SOFC operating time.

[0015] The output thermal power of the SOFC is determined by the enthalpy of hydrogen, the effective single-cell voltage of the SOFC, the total output current of the SOFC, the active area of ​​the SOFC, and the number of single-cell SOFC units.

[0016] The thermal power of the SOFC inlet and outlet gases includes: anode inlet thermal power, cathode inlet thermal power, anode outlet thermal power, and cathode outlet thermal power;

[0017] 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;

[0018] 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;

[0019] The anode outlet heat power is determined by the anode outlet specific heat capacity, the anode outlet mass flow rate, and the anode outlet temperature;

[0020] The cathode outlet heat power is determined by the cathode outlet specific heat capacity, the cathode outlet mass flow rate, and the cathode outlet temperature.

[0021] In one possible implementation, before constructing the SOFC energy sub-model, the following is also included:

[0022] Construct an electrochemical sub-model and a performance degradation sub-model for SOFCs;

[0023] The SOFC electrochemical sub-model is used to determine the SOFC monolithic voltage based on Nernst voltage, SOFC activation polarization, SOFC ohmic polarization, and SOFC concentration polarization.

[0024] The SOFC performance decay sub-model is used to determine the SOFC voltage decay rate based on the hydrogen mass component ratio and SOFC output current density.

[0025] In one possible implementation, determining the exhaust gas temperature of the SOFC based on the SOFC output thermal power, the SOFC inlet and outlet gas thermal power, and space loss thermal energy includes:

[0026] The SOFC output thermal power, the SOFC inlet and outlet gas thermal power, and the space loss thermal energy are processed using the least squares method to obtain the SOFC exhaust gas temperature.

[0027] In one possible implementation, the quantitative parameters of the SOFC mixed gas outlet components include: anode outlet gas mass flow rate, anode outlet gas hydrogen mass percentage, anode outlet gas water vapor mass percentage, cathode outlet gas mass flow rate, cathode outlet gas oxygen mass percentage, cathode outlet gas nitrogen mass percentage, and cathode outlet gas water vapor mass percentage.

[0028] In one possible implementation, the quantitative parameters of the combustor exhaust gas mixture composition include: the mass percentage of oxygen in the combustor exhaust gas, the mass percentage of nitrogen in the combustor exhaust gas, and the mass percentage of water vapor in the combustor exhaust gas.

[0029] In one possible implementation, the method further includes:

[0030] Set the design parameter values ​​for the air compression mechanism, the hydrogen compression mechanism, the hot water supply mechanism, and the cold energy supply mechanism in the framework of the combined cooling, heating, and power system.

[0031] Secondly, embodiments of this application provide a modeling apparatus for a SOFC-based combined cooling, heating and power system, the apparatus comprising:

[0032] The first building module is used to construct a combined cooling, heating and power (CCHP) system framework based on SOFC. The CCHP 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 cooling 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 cooling supply mechanism are respectively connected to the burner. The electric power output mechanism is connected to the burner.

[0033] The second construction module is used to construct an SOFC energy sub-model, wherein the SOFC energy sub-model is used to determine the SOFC output electrical power, SOFC output thermal power, and SOFC inlet and outlet gas thermal power based on the electrochemical parameters of the SOFC.

[0034] The third construction module is used to construct a sub-model for quantifying the components of SOFC mixed gas, wherein the sub-model is used to determine the quantification parameters of the SOFC mixed gas output components based on the proportion of the inlet mixed gas components of the SOFC.

[0035] The fourth construction module is used to construct a quantitative sub-model of SOFC exhaust gas temperature, wherein the SOFC exhaust gas temperature quantification sub-model is used to determine the exhaust gas temperature of the SOFC based on the SOFC output thermal power, the SOFC inlet and outlet gas thermal power and the space loss thermal energy.

[0036] The fifth construction module is used to construct a sub-model for quantifying the composition of the burner mixed gas. The sub-model is used to determine the specific heat capacity of the burner inlet mixed gas based on the quantification parameters of the SOFC mixed gas outlet composition and the burner inlet gas mass flow rate, determine the quantification parameters of the burner outlet mixed gas composition based on the quantification parameters of the SOFC mixed gas outlet composition, and determine the specific heat capacity of the burner outlet mixed gas based on the quantification parameters of the burner outlet mixed gas composition.

[0037] The sixth construction module is used to construct a quantification sub-model of burner mixed gas temperature, wherein the quantification sub-model of burner mixed gas temperature is used to determine the burner tail gas temperature based on the specific heat capacity of the burner inlet mixed gas and the specific heat capacity of the burner outlet mixed gas.

[0038] Thirdly, embodiments of this application provide an electronic device, including:

[0039] Memory, used to store programs;

[0040] A processor for executing a program stored in the memory, wherein when the processor executes the program stored in the memory, the processor is configured to perform the method described in the first aspect above.

[0041] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions for executing the modeling method for a SOFC-based combined cooling, heating and power system as described in the first aspect above.

[0042] The solutions provided in the second to fourth aspects above are used to implement or cooperate with the modeling method of SOFC-based combined cooling, heating and power system provided in the first aspect above. Therefore, they can achieve the same or corresponding beneficial effects as the first aspect, and will not be elaborated here.

[0043] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0044] Figure 1 A schematic flowchart illustrating the modeling method for a SOFC-based combined cooling, heating and power system provided in the first embodiment of this application;

[0045] Figure 2 A schematic diagram of a combined cooling, heating and power system framework based on SOFC provided for an embodiment of this application;

[0046] Figure 3 A flowchart illustrating the modeling method for a SOFC-based combined cooling, heating and power system provided in the second embodiment of this application;

[0047] Figure 4 A schematic diagram illustrating parameter calibration of an SOFC model provided in an embodiment of this application;

[0048] Figure 5 A visualization diagram for quantifying SOFC and burner outlet gas temperature provided in an embodiment of this application;

[0049] Figure 6 A visualization chart for quantifying the mass percentage of SOFC exhaust gas components is provided in an embodiment of this application.

[0050] Figure 7 A visualization diagram quantifying the mass percentage of burner exhaust gas components provided in an embodiment of this application;

[0051] Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0052] To make the objectives, technical methods, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0053] It should be noted that the meaning of "multiple" (or "more than") in the description of the embodiments of this application refers to two or more, and "greater than," "less than," "exceeding," etc. are understood to exclude the number itself, while "above," "below," "within," etc. are understood to include the number itself. If "first," "second," etc. are used in the description, they are only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0054] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, the simultaneous existence of A and B, or the existence of B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects 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 represent: the existence of a alone, the existence of b alone, the existence of c alone, the simultaneous existence of a and b, the simultaneous existence of a and c, the simultaneous existence of b and c, or the simultaneous existence of a, b, and c, where a, b, and c can be single or multiple.

[0055] The terms "substantially," "about," and similar terms used in the embodiments of this application are used as approximate terms, not as terms of degree, and are intended to take into account the inherent biases of measurements or calculations known to those skilled in the art. Furthermore, the term "may" used in describing the embodiments of this application refers to "one or more possible embodiments." The terms "use," "using," and "used" used in the embodiments of this application can be considered synonymous with the terms "utilize," "utilizing," and "utilized," respectively. Additionally, the term "exemplary" is intended to refer to an instance or illustration.

[0056] See Figure 1 This is a flowchart illustrating a modeling method for a SOFC-based combined cooling, heating and power system provided in the first embodiment of this application. The method includes the following steps:

[0057] Step S101: Construct a combined cooling, heating and power (CCHP) system framework based on SOFC. The CCHP 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 cooling 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 cooling supply mechanism are respectively connected to the burner. The electric power output mechanism is connected to the burner.

[0058] Specifically, the air compression mechanism and the hydrogen compression mechanism are used to provide heated air and heated hydrogen flow to the SOFC, respectively. Air and oxygen undergo an electrochemical reaction within the SOFC, generating electrical and thermal energy. The electrical energy output from the SOFC is supplied to electrical equipment via a power output mechanism. Excess hydrogen, heated by the electrochemical reaction, enters the burner for thorough mixing and combustion to further increase the temperature. The high-temperature exhaust gas mixture discharged from the burner can be sent to a hot water supply mechanism for heating hot water; it can also be sent to a cooling supply mechanism for heat exchange, utilizing the heat from the exhaust gas mixture to heat water. The heated water can then be sent to the hot water supply mechanism. The exhaust gas mixture, after heat exchange, becomes a low-temperature gas, generating cooling energy.

[0059] For example, a model framework for a solid oxide fuel cell combined cooling, heating and power system can be designed and built on the TRNSYS simulation platform.

[0060] Step S102: Construct an SOFC energy sub-model, wherein the SOFC energy sub-model is used to determine the SOFC output electrical power, SOFC output thermal power, and SOFC inlet and outlet gas thermal power based on the electrochemical parameters of the SOFC.

[0061] For example, 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 specific heat capacity, anode inlet mass flow rate, anode inlet temperature, cathode inlet specific heat capacity, cathode inlet mass flow rate, cathode inlet temperature, anode outlet specific heat capacity, anode outlet mass flow rate, anode outlet temperature, cathode outlet specific heat capacity, cathode outlet mass flow rate, and cathode outlet temperature.

[0062] For example, the SOFC output power is determined by the effective single-cell voltage of the SOFC, the total output current of the SOFC, the active area of ​​the SOFC, and the number of SOFC cells. This SOFC output power can be used to evaluate the electrical energy output of a CCHP system.

[0063] For example, the effective single-chip voltage of SOFC is determined by the single-chip voltage of SOFC, the SOFC voltage decay rate, and the SOFC operating time.

[0064] For example, the output thermal power of SOFC is determined by the enthalpy of hydrogen, the effective single-cell voltage of SOFC, the total output current of SOFC, the active area of ​​SOFC, and the number of single-cell SOFC.

[0065] For example, the inlet and outlet gas thermal power of an SOFC includes: anode inlet gas thermal power, cathode inlet gas thermal power, anode outlet gas thermal power, and cathode outlet gas thermal power.

[0066] For example, the anode inlet heat power is determined by the anode inlet specific heat capacity, the anode inlet mass flow rate, and the anode inlet temperature.

[0067] For example, the cathode inlet gas thermal power is determined by the cathode inlet gas specific heat capacity, cathode inlet gas mass flow rate, and cathode inlet gas temperature.

[0068] For example, the anode outlet heat power is determined by the anode outlet specific heat capacity, the anode outlet mass flow rate, and the anode outlet temperature.

[0069] For example, the cathode outlet heat power is determined by the cathode outlet specific heat capacity, cathode outlet mass flow rate, and cathode outlet temperature.

[0070] It should be noted that the SOFC inlet and outlet include an anode inlet, a cathode inlet, an anode outlet, and a cathode outlet. The anode inlet and anode outlet are the hydrogen inlet and outlet, respectively, while the cathode inlet and cathode outlet are the air inlet and outlet, respectively.

[0071] Step S103: Construct a sub-model for quantifying the components of SOFC mixed gas, wherein the sub-model is used to determine the quantification parameters of the SOFC mixed gas output components based on the proportion of SOFC inlet mixed gas components.

[0072] For example, the proportions of the gas components entering the gas mixture include the mass proportions of hydrogen entering the anode, water vapor entering the anode, oxygen entering the cathode, nitrogen entering the cathode, and water vapor entering the cathode.

[0073] For example, the quantitative parameters of the SOFC mixed gas output components include: anode output gas mass flow rate, anode output gas hydrogen mass percentage, anode output gas water vapor mass percentage, cathode output gas mass flow rate, cathode output gas oxygen mass percentage, cathode output gas nitrogen mass percentage, and cathode output gas water vapor mass percentage.

[0074] Among them, the mass ratio of hydrogen gas at the anode outlet is determined based on the mass ratio of hydrogen gas at the anode inlet, the mass ratio of water vapor gas at the anode outlet is determined based on the mass ratio of water vapor gas at the anode inlet, the mass flow rate of gas at the anode outlet is determined based on the mass flow rate of gas at the anode inlet, and the mass flow rate of gas at the anode inlet is determined based on the mass ratio of hydrogen gas at the anode inlet.

[0075] The mass percentage of oxygen in the cathode outlet gas is determined based on the mass percentage of oxygen in the cathode inlet gas; the mass percentage of nitrogen in the cathode outlet gas is determined based on the mass percentage of nitrogen in the cathode inlet gas; the mass percentage of water vapor in the cathode inlet gas is determined based on the mass percentage of water vapor in the cathode inlet gas; the mass flow rate of the cathode outlet gas is determined based on the mass flow rate of the cathode inlet gas; and the mass flow rate of the cathode inlet gas is determined based on the mass percentage of oxygen in the cathode inlet gas.

[0076] Step S104: Construct a quantitative sub-model for SOFC exhaust gas temperature, wherein the quantitative sub-model for SOFC exhaust gas temperature is used to determine the SOFC exhaust gas temperature based on the SOFC output thermal power, the SOFC inlet and outlet gas thermal power, and the space loss thermal energy.

[0077] For example, the SOFC output thermal power, SOFC inlet and outlet gas thermal power, and space loss thermal energy can be processed using the least squares method to obtain the SOFC exhaust gas temperature.

[0078] Step S105: Construct a sub-model for quantifying the components of the burner mixed gas. The sub-model is used to determine the specific heat capacity of the burner inlet mixed gas based on the quantification parameters of the SOFC mixed gas outlet components and the burner inlet gas mass flow rate, to determine the quantification parameters of the burner outlet mixed gas components based on the quantification parameters of the SOFC mixed gas outlet components, and to determine the specific heat capacity of the burner outlet mixed gas based on the quantification parameters of the burner outlet mixed gas components.

[0079] For example, the quantitative parameters of the combustor outlet gas mixture composition include: the mass percentage of oxygen in the combustor outlet gas, the mass percentage of nitrogen in the combustor outlet gas, and the mass percentage of water vapor in the combustor outlet gas.

[0080] The mass ratio of oxygen in the burner exhaust is determined based on the mass ratio of oxygen in the cathode exhaust and the mass consumption rate of hydrogen in the burner. The mass ratio of water vapor in the burner exhaust is determined based on the mass ratio of water vapor in the anode exhaust, the mass ratio of water vapor in the cathode exhaust, and the mass consumption rate of hydrogen in the burner. The mass ratio of nitrogen in the burner exhaust is determined based on the mass ratio of oxygen in the burner exhaust and the mass ratio of water vapor in the burner exhaust.

[0081] Step S106: Construct a quantification sub-model for burner mixed gas temperature, wherein the quantification sub-model for burner mixed gas temperature is used to determine the burner tail gas temperature based on the specific heat capacity of the inlet mixed gas and the specific heat capacity of the outlet mixed gas.

[0082] In some possible embodiments of this application, before constructing the SOFC energy sub-model, the following are also performed: constructing the SOFC electrochemical sub-model and the SOFC performance degradation sub-model; wherein, the SOFC electrochemical sub-model is used to determine the SOFC single-chip voltage based on Nernst voltage, SOFC activation polarization, SOFC ohmic polarization and SOFC concentration polarization; the SOFC performance degradation sub-model is used to determine the SOFC voltage decay rate based on the hydrogen mass composition ratio and SOFC output current density.

[0083] In one possible implementation, the modeling method also includes setting design parameter values ​​for the air compression mechanism, hydrogen compression mechanism, hot water supply mechanism, and cooling supply mechanism in the combined cooling, heating, and power system framework.

[0084] See Figure 2 This is a schematic diagram of a combined cooling, heating, and power (CCHP) system framework based on SOFC, provided in an embodiment of this application. The framework includes components such as 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 (SOFC), burners, gas-liquid heat exchangers, water pumps, hot water storage tanks, water separators, water mixers, liquid electric heaters, absorption chillers, cooling coils, and fans.

[0085] Figure 2 In the combined cooling, heating, and power (CCHP) system framework shown, the air compressor, and the gas heat exchanger and gas electric heater connected in sequence to the air compressor belong to the air compression mechanism; the hydrogen compressor, hydrogen storage tank, and the gas heat exchanger and gas electric heater connected in sequence to the hydrogen storage tank belong to the hydrogen compression mechanism; the DC / AC inverter belongs to the electric power output mechanism; the hot water storage tank, water separator, water mixer, and liquid electric heater belong to the hot water supply mechanism; and the absorption chiller, cooling coil, and fan belong to the cooling capacity supply mechanism.

[0086] Figure 2 The working process of the combined cooling, heating and power system framework shown is as follows:

[0087] Photovoltaic panels generate electricity under the influence of solar energy. This electricity is stored in energy storage batteries (path 1) and transmitted to an electrolyzer (path 2) via a DC / DC inverter to produce hydrogen. The resulting hydrogen is compressed by a hydrogen compressor (path 3) and stored in a hydrogen storage tank (path 4). An air compressor and a hydrogen storage tank provide air and hydrogen flow respectively, and the gases are heated by a gas exchanger and a gas electric heater (paths 5, 6, 7 and 8, 9, 10) before being fed into the solid oxide fuel cell stack for an electrochemical reaction that generates electricity and heat. Excess hydrogen heated by the electrochemical reaction enters the burner (paths 11 and 12) for thorough mixing and combustion to further increase the temperature. The high-temperature mixed gas exhaust from the burner preheats the incoming air and hydrogen through a cathode gas heat exchanger (path 13) and an anode gas heat exchanger (path 14). Under the building's hot water supply demand, the exhaust high-temperature mixed gas will flow through paths 18 and 19 (path 16 valve closed), pass through the gas-liquid heat exchanger, and then be discharged from the system through path 20. Domestic water in the hot water storage tank is pumped between the gas-liquid heat exchanger and the hot water storage tank to form a water circulation (paths 21 and 22), displacing the heat from the exhaust high-temperature mixed gas and storing it in the hot water storage tank. After entering the system (path 23), municipal tap water is separated by a water separator; one portion flows through the hot water storage tank for heating (paths 24 and 25), while the other portion mixes with the water flow (path 26) in a water mixer, and then is further heated by a fluid electric heater (path 27) before being delivered to the building. Under the summer cooling supply demand, the exhaust high-temperature gas passes through paths 15 and 16 (path 18 valve closed), and transfers heat to the absorption chiller's water circulation (paths 28, 29, and 30) in the gas-liquid heat exchanger, then passes through paths 17 and 19 to participate in the heating process of the hot water storage tank. The absorption chiller, heated by the water circulation, generates cooling capacity, which is then pumped into the cooling coils via a water pump for circulation (paths 31, 32). Fans draw air from the atmosphere into the cooling coils to exchange heat with the working fluid, thus reducing the airflow temperature (paths 33, 34). The air exhausted from the cooling coils is then heated by a gas electric heater to achieve the required temperature and humidity before being delivered into the building interior (paths 35, 36). Furthermore, the electrical energy generated by the solid oxide fuel cell is coupled with the electrical energy output from the energy storage battery to jointly power its components and the building's operation (paths 37, 38).

[0088] See Figure 3 This is a flowchart illustrating a modeling method for a SOFC-based combined cooling, heating and power system provided in the second embodiment of this application. The method includes the following steps:

[0089] Step S201: Design and build a framework model of a solid oxide fuel cell (SOFC) combined cooling, heating and power (CCHP) system on the TRNSYS simulation platform.

[0090] It should be noted that the implementation method of step S201 can refer to the relevant description of step S101 above, and will not be repeated here.

[0091] Step S202: Construct the SOFC electrochemical model and the SOFC performance degradation sub-model. See steps S202.1 and S202.2 below for details.

[0092] Step S202.1: Construct an electrochemical model of SOFC, including calculating the single-cell voltage of SOFC. The expression for the single-cell voltage of SOFC is:

[0093] (Formula 1)

[0094] in E SOFC For SOFC single-chip voltage, E ner for Nernst voltage, E SOFC,act For SOFC activation polarization, E SOFC,ohm For SOFC ohmic polarization, E SOFC,co This is SOFC concentration polarization.

[0095] The expression for Nernst voltage is:

[0096] (Formula 2)

[0097] in This is due to partial decompression of hydrogen gas. This is a partial decompression of oxygen. R is the partial pressure of water vapor, 8.315 J / (mol·K) is the ideal gas constant, T is the SOFC operating temperature, and F is the Faraday constant, 96485 C / mol.

[0098] The expression for SOFC activation polarization is:

[0099] (Formula 3)

[0100] in T SOFC This refers to the operating temperature of SOFC. For SOFC output current density, For SOFC anode current exchange density, This represents the cathode exchange current density of the SOFC.

[0101] The expression for SOFC ohmic polarization is:

[0102] (Formula 4)

[0103] ISOFC is the total output current of SOFC. d a , d c , d ele , d int These refer to the thicknesses of the SOFC anode, cathode, ion exchange membrane, and bonding layer, respectively. κ a , κ c , κ ele , κ int The conductivity of the SOFC anode, cathode, ion exchange membrane, and connecting layer.

[0104] The expression for SOFC concentration polarization is:

[0105] (Formula 5)

[0106] in , , These are the limiting current densities for hydrogen, oxygen, and water vapor, respectively.

[0107] Step S202.2: Construct the SOFC performance degradation sub-model.

[0108] The expression for the SOFC voltage decay rate is:

[0109] (Formula 6)

[0110] in ρ For SOFC voltage decay rate, This represents the percentage of hydrogen in the mass composition of the gas.

[0111] Step S203: Construct the energy sub-model, the component quantification sub-model of the mixed gas, and the temperature quantification sub-model of the exhaust gas for the SOFC. See steps S203.1, S203.2, and S203.3 below for details.

[0112] Step S203.1: Construct the SOFC energy sub-model, including calculating the SOFC's output electrical power, output thermal power, anode inlet thermal power, cathode inlet thermal power, anode outlet thermal power, and cathode outlet thermal power.

[0113] The expression for the output power of an SOFC is:

[0114] (Formula 7)

[0115] in P e For SOFC output power, This is the effective single-chip voltage of SOFC. A SOFC For SOFC active area, N SOFC This represents the number of SOFC chips.

[0116] The effective single-chip voltage of an SOFC can be calculated as follows:

[0117] (Formula 8)

[0118] in t This refers to the SOFC runtime.

[0119] The expression for the output thermal power of SOFC is:

[0120] (Formula 9)

[0121] in P th For SOFC to output thermal power, This is the enthalpy of hydrogen, 2.42 × 10⁻⁶. 5 J / mol, where n is the number of electrons carried by a single hydrogen molecule, 2.

[0122] The expression for the heat power of the SOFC anode inlet gas is:

[0123] (Formula 10)

[0124] in The heat power of the anode inlet gas. The specific heat capacity of the gas entering at the anode. This represents the mass flow rate of the gas entering the anode. This is the anode inlet temperature.

[0125] The expression for the heat power of the SOFC cathode inlet gas is:

[0126] (Formula 11)

[0127] in The cathode gas inlet heat power, The specific heat capacity of the cathode gas inlet. This is the cathode inlet mass flow rate. This is the cathode inlet temperature.

[0128] The expression for the heat power of SOFC anode outlet gas is:

[0129] (Formula 12)

[0130] in This represents the heat power of the anode outlet gas. The specific heat capacity of the gas exiting the anode. This represents the mass flow rate of the gas exiting the anode. This is the anode outlet temperature.

[0131] The expression for the heat power of SOFC cathode outlet gas is:

[0132] (Formula 13)

[0133] in The cathode outlet heat power, The cathode outlet heat power, This represents the cathode outlet mass flow rate. This is the cathode outlet temperature.

[0134] Step S203.2: Construct a SOFC mixed gas composition model, including calculating the specific heat capacity of the anode inlet gas, the mass percentage of hydrogen in the anode inlet gas, the mass percentage of water vapor in the anode inlet gas, the mass flow rate of the anode inlet gas, the specific heat capacity of the cathode inlet gas, the mass percentage of oxygen in the cathode inlet gas, the mass percentage of nitrogen in the cathode inlet gas, the mass percentage of water vapor in the cathode inlet gas, the mass flow rate of the anode outlet gas, the specific heat capacity of the anode outlet gas, the mass percentage of hydrogen in the anode outlet gas, the mass percentage of water vapor in the anode outlet gas, the mass flow rate of the cathode outlet gas, the specific heat capacity of the cathode outlet gas, the mass percentage of oxygen in the cathode outlet gas, the mass percentage of water vapor in the cathode outlet gas, and the mass percentage of nitrogen in the cathode outlet gas.

[0135] The expression for the specific heat capacity of the anode inlet gas is:

[0136] (Formula 14)

[0137] in The percentage of hydrogen mass entering from the anode. The specific heat capacity of hydrogen is 1.43 × 10⁻⁶. 4 J / (kg·K), The percentage of water vapor entering from the anode. The specific heat capacity of water vapor is 1.85 × 10⁻⁶. 3 J / (kg·K).

[0138] The expression for the mass ratio of hydrogen gas entering from the anode is:

[0139] (Formula 15)

[0140] in The molar mass of hydrogen is 0.002 kg / mol. The molar mass of water is 0.018 kg / mol. The volume percentage of hydrogen gas entering at the anode. This represents the percentage of water vapor volume entering the anode.

[0141] The expression for the mass ratio of water vapor entering from the anode is:

[0142] (Formula 16)

[0143] The anode inlet mass flow rate can be calculated as follows:

[0144] (Formula 17)

[0145] in α a For the stoichiometry of the anode, The number of electrons carried by a hydrogen molecule is 2.

[0146] The expression for the specific heat capacity of the cathode gas inlet is:

[0147] (Formula 18)

[0148] in This represents the percentage of oxygen mass entering the cathode. The mass percentage of nitrogen entering at the cathode. The mass percentage of water vapor entering the cathode. The specific heat capacity of oxygen is 909 J / (kg·K). The specific heat capacity of nitrogen is 1038 J / (kg·K).

[0149] The expression for the mass ratio of oxygen entering at the cathode is:

[0150] (Formula 19)

[0151] in The molar mass of oxygen is 0.018 kg / mol. The molar mass of nitrogen is 0.028 kg / mol. This represents the volume percentage of oxygen introduced at the cathode. This represents the volume percentage of nitrogen gas introduced at the cathode. This represents the percentage of water vapor volume entering the cathode.

[0152] The expression for the mass ratio of nitrogen gas entering the cathode is:

[0153] (Formula 20)

[0154] The expression for the mass ratio of water vapor entering the cathode is:

[0155] (Formula 21)

[0156] The expression for the cathode inlet mass flow rate is:

[0157] (Formula 22)

[0158] in α c The stoichiometry of the cathode. The number of electrons carried by an oxygen molecule is 4.

[0159] The expression for the anode outlet mass flow rate is:

[0160] (Formula 23)

[0161] The expression for the specific heat capacity of the anode outlet gas is:

[0162] (Formula 24)

[0163] in This represents the mass percentage of hydrogen gas exiting the anode. This represents the percentage of water vapor produced at the anode.

[0164] The expression for the mass percentage of hydrogen gas exiting the anode is:

[0165] (Formula 25)

[0166] The expression for the mass percentage of water vapor exiting the anode is:

[0167] (Formula 26)

[0168] The expression for the cathode outlet mass flow rate is:

[0169] (Formula 27)

[0170] The expression for the specific heat capacity of the cathode outlet gas is:

[0171] (Formula 28)

[0172] in This represents the percentage of oxygen mass emitted from the cathode. This represents the mass percentage of nitrogen emitted from the cathode. This represents the percentage of water vapor produced at the cathode.

[0173] The expression for the mass percentage of oxygen in the cathode outlet gas is:

[0174] (Formula 29)

[0175] The expression for the mass percentage of water vapor in the cathode outlet gas is:

[0176] (Formula 30)

[0177] The expression for the mass ratio of nitrogen gas at the cathode outlet is:

[0178] (Formula 31)

[0179] Step S203.3: Construct a sub-model for quantifying the temperature of SOFC exhaust gas, with the following expression:

[0180] (Formula 32)

[0181] in Let Pth,loss be the temperature of the SOFC exhaust gas mixture, and Pth,loss be the thermal energy lost in space. This can be calculated as follows:

[0182] (Formula 33)

[0183] in h The convective heat transfer coefficient is 9 W / (m²·K). S The surface area of ​​SOFC in contact with air. σ The Stefan-Boltzmann constant is 5.67 × 10⁻⁶. -8 W / (m 2 ·K 4 ), γ For SOFC surface emissivity, 0.5, T am The ambient temperature is 298.15 K.

[0184] FSOLVE is a formula for solving nonlinear equation systems based on the least squares method, which can be expressed as:

[0185] (Formula 34)

[0186] (Formula 35)

[0187] Step S204: Based on the SOFC experimental data, calibrate the SOFC model. See [link / reference] Figure 4 This is a schematic diagram of parameter calibration for an SOFC model provided in an embodiment of this application, in which the correspondence between the single-chip voltage and current density of SOFC is calibrated under different temperature conditions.

[0188] Step S205: Construct a quantitative sub-model of the combustor's mixed gas composition and a quantitative sub-model of the exhaust gas temperature. For details, please refer to the descriptions in steps S205.1 and S205.2 below.

[0189] Step S205.1: Construct a component quantification sub-model of the burner gas mixture, including calculating the specific heat capacity of the inlet gas mixture, the specific heat capacity of the outlet gas mixture, the mass percentage of oxygen in the outlet gas, the mass percentage of nitrogen in the outlet gas, and the mass percentage of water vapor in the outlet gas.

[0190] The expression for the specific heat capacity of the inlet gas mixture of the burner is:

[0191] (Formula 36)

[0192] in This refers to the mass flow rate of the gas entering the burner.

[0193] The expression for the specific heat capacity of the gas mixture at the burner's outlet is:

[0194] (Formula 37)

[0195] in This refers to the percentage of oxygen in the burner exhaust gas by mass. The mass percentage of nitrogen in the burner exhaust gas. This represents the mass percentage of water vapor in the burner exhaust.

[0196] The expression for the mass ratio of oxygen in the burner exhaust gas is:

[0197] (Formula 38)

[0198] in This represents the rate of hydrogen consumption within the burner.

[0199] The expression for the mass ratio of water vapor in the burner exhaust gas is:

[0200] (Formula 39)

[0201] The expression for the mass ratio of nitrogen in the burner exhaust gas is:

[0202] (Formula 40)

[0203] Step S205.2: Construct a quantitative sub-model of burner exhaust gas temperature, including calculating the burner outlet gas temperature.

[0204] The expression for the burner outlet gas temperature is:

[0205] (Formula 41)

[0206] Step S206. Based on the specific service conditions required by the SOFC and burner, set the design parameter values ​​for the key auxiliary components of the combined cooling, heating and power system in the 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. See Table 1 below.

[0207] Table 1

[0208]

[0209] As an optional embodiment, the relevant quantitative data can also be visualized based on the constructed sub-models for the quantitative composition of the SOFC and burner mixture and the quantitative sub-models for the temperature of the SOFC and burner mixture, such as... Figure 5 The visualization shown is a quantitative representation of SOFC and burner outlet gas temperature, as follows: Figure 6 The visualization shown is a quantitative representation of the mass percentage of SOFC exhaust gas components. Figure 7 The image shows a visualization of the mass percentage of components in the burner exhaust gas.

[0210] For example, the modeling method for a SOFC-based combined cooling, heating, and power system provided in this application embodiment can be applied to a terminal, a server, or software running on a terminal or server. In some embodiments, the terminal can be a smartphone, tablet, laptop, desktop computer, etc.; the server can be configured as an independent physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, content delivery networks (CDN), and big data and artificial intelligence platforms; the software can be an application that implements the SOFC-based combined cooling, heating, and power system modeling method, but is not limited to the above forms.

[0211] Exemplary embodiments of this application can be used in numerous general-purpose or special-purpose computer system environments or configurations. Examples include: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics devices, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc. This 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. This application can also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communication network. In a distributed computing environment, program modules can reside in local and remote computer storage media, including storage devices.

[0212] This application also provides a modeling device for a SOFC-based combined cooling, heating and power system, the device comprising:

[0213] The first building module is used to construct a combined cooling, heating and power (CCHP) system framework based on SOFC. The CCHP 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 cooling 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 cooling supply mechanism are respectively connected to the burner. The electric power output mechanism is connected to the burner.

[0214] The second construction module is used to construct an SOFC energy sub-model, wherein the SOFC energy sub-model is used to determine the SOFC output electrical power, SOFC output thermal power, and SOFC inlet and outlet gas thermal power based on the electrochemical parameters of the SOFC.

[0215] The third construction module is used to construct a sub-model for quantifying the components of SOFC mixed gas, wherein the sub-model is used to determine the quantification parameters of the SOFC mixed gas output components based on the proportion of the inlet mixed gas components of the SOFC.

[0216] The fourth construction module is used to construct a quantitative sub-model of SOFC exhaust gas temperature, wherein the SOFC exhaust gas temperature quantification sub-model is used to determine the exhaust gas temperature of the SOFC based on the SOFC output thermal power, the SOFC inlet and outlet gas thermal power and the space loss thermal energy.

[0217] The fifth construction module is used to construct a sub-model for quantifying the composition of the burner mixed gas. The sub-model is used to determine the specific heat capacity of the burner inlet mixed gas based on the quantification parameters of the SOFC mixed gas outlet composition and the burner inlet gas mass flow rate, determine the quantification parameters of the burner outlet mixed gas composition based on the quantification parameters of the SOFC mixed gas outlet composition, and determine the specific heat capacity of the burner outlet mixed gas based on the quantification parameters of the burner outlet mixed gas composition.

[0218] The sixth construction module is used to construct a quantification sub-model of burner mixed gas temperature, wherein the quantification sub-model of burner mixed gas temperature is used to determine the burner tail gas temperature based on the specific heat capacity of the burner inlet mixed gas and the specific heat capacity of the burner outlet mixed gas.

[0219] It should be noted that the information interaction and execution process between the above modules / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.

[0220] See Figure 8 This application also provides an electronic device 300. The electronic device 300 can be a server or a terminal, and its internal structure includes, but is not limited to:

[0221] Memory 310 is used to store programs;

[0222] 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 SOFC-based combined cooling, heating and power system as in any of the preceding embodiments.

[0223] The processor 320 and memory 310 can be connected via a bus or other means.

[0224] The memory 310, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs, such as the SOFC-based combined cooling, heating, and power system modeling method described in any embodiment of this application. The processor 320 implements the SOFC-based combined cooling, heating, and power system modeling method as described in any of the preceding embodiments by running the non-transitory software programs and instructions stored in the memory 310.

[0225] The memory 310 may include a program storage area and a data storage area. The program storage area may store the operating system and application programs required for at least one function. The data storage area may store the modeling method for the SOFC-based combined cooling, heating, and power system described above. Furthermore, the memory 310 may include high-speed random access memory and non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 310 may optionally include memory remotely located relative to the processor 320, which can be connected to the processor 320 via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0226] The non-transient software program and instructions required to implement the above-described SOFC-based combined cooling, heating and power system modeling method are stored in memory 310. When executed by one or more processors 320, the SOFC-based combined cooling, heating and power system modeling method provided in any embodiment of this application is executed.

[0227] This application also provides a computer-readable storage medium storing computer-executable instructions for executing the above-described modeling method for a SOFC-based combined cooling, heating and power system.

[0228] In one embodiment, the storage medium stores computer-executable instructions that are executed by one or more control processors, such as one or more processors 320 in the electronic device 300, which can cause the one or more processors 320 to execute the modeling method for a SOFC-based combined cooling, heating and power system provided in any embodiment of this application.

[0229] The embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0230] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media 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 includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0231] Furthermore, one embodiment of this application also provides a computer program product, including a computer program that, when executed by a processor, implements a modeling method for a SOFC-based combined cooling, heating and power system as described in any of the preceding embodiments.

[0232] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0233] It should also be understood that the various implementation methods provided in this application can be combined arbitrarily to achieve different technical effects.

[0234] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the scope of the technology disclosed in this application, or make equivalent substitutions for some of the technical features. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application.

Claims

1. A modeling method for a SOFC-based combined cooling, heating and power system, characterized in that, The method includes the following steps: A combined cooling, heating, and power (CCHP) system framework based on SOFC is constructed. The CCHP 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 cooling 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 cooling supply mechanism are respectively connected to the burner. The electric power output mechanism is connected to the burner. An SOFC energy sub-model is constructed, wherein the SOFC energy sub-model is used to determine the SOFC output electrical power, SOFC output thermal power, and SOFC inlet and outlet gas thermal power based on the electrochemical parameters of the SOFC; A sub-model for quantifying the components of an SOFC mixed gas is constructed, wherein the sub-model is used to determine the quantification parameters of the SOFC mixed gas output components based on the proportion of the components in the SOFC inlet mixed gas. A quantitative sub-model for SOFC exhaust gas temperature is constructed, wherein the SOFC exhaust gas temperature quantification sub-model is used to determine the SOFC exhaust gas temperature based on the SOFC output thermal power, the SOFC inlet and outlet gas thermal power, and the space loss thermal energy. A sub-model for quantifying the composition of the burner mixed gas is constructed, wherein the sub-model is used to determine the specific heat capacity of the burner inlet mixed gas based on the quantification parameters of the SOFC mixed gas outlet composition and the burner inlet gas mass flow rate, to determine the quantification parameters of the burner outlet mixed gas composition based on the quantification parameters of the SOFC mixed gas outlet composition, and to determine the specific heat capacity of the burner outlet mixed gas based on the quantification parameters of the burner outlet mixed gas composition. A quantification sub-model for burner mixed gas temperature is constructed, wherein the quantification sub-model for burner mixed gas temperature is used to determine the burner tail gas temperature based on the specific heat capacity of the inlet mixed gas and the specific heat capacity of the outlet mixed gas.

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

3. The method according to claim 2, characterized in that, Before constructing the SOFC energy sub-model, the following is also included: Construct an electrochemical sub-model and a performance degradation sub-model for SOFCs; The SOFC electrochemical sub-model is used to determine the SOFC monolithic voltage based on 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 SOFC output current density.

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

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

6. The method according to claim 5, characterized in that, The quantitative parameters of the combustor exhaust gas mixture composition include: the mass percentage of oxygen in the combustor exhaust gas, the mass percentage of nitrogen in the combustor exhaust gas, and the mass percentage of water vapor in the combustor exhaust gas.

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

8. A modeling device for a SOFC-based combined cooling, heating and power system, characterized in that, The device includes: The first building module is used to construct a combined cooling, heating and power (CCHP) system framework based on SOFC. The CCHP 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 cooling 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 cooling supply mechanism are respectively connected to the burner. The electric power output mechanism is connected to the burner. The second construction module is used to construct an SOFC energy sub-model, wherein the SOFC energy sub-model is used to determine the SOFC output electrical power, SOFC output thermal power, and SOFC inlet and outlet gas thermal power based on the electrochemical parameters of the SOFC. The third construction module is used to construct a sub-model for quantifying the components of SOFC mixed gas, wherein the sub-model is used to determine the quantification parameters of the SOFC mixed gas output components based on the proportion of the inlet mixed gas components of the SOFC. The fourth construction module is used to construct a quantitative sub-model of SOFC exhaust gas temperature, wherein the SOFC exhaust gas temperature quantification sub-model is used to determine the exhaust gas temperature of the SOFC based on the SOFC output thermal power, the SOFC inlet and outlet gas thermal power and the space loss thermal energy. The fifth construction module is used to construct a sub-model for quantifying the composition of the burner mixed gas. The sub-model is used to determine the specific heat capacity of the burner inlet mixed gas based on the quantification parameters of the SOFC mixed gas outlet composition and the burner inlet gas mass flow rate, determine the quantification parameters of the burner outlet mixed gas composition based on the quantification parameters of the SOFC mixed gas outlet composition, and determine the specific heat capacity of the burner outlet mixed gas based on the quantification parameters of the burner outlet mixed gas composition. The sixth construction module is used to construct a quantification sub-model of burner mixed gas temperature, wherein the quantification sub-model of burner mixed gas temperature is used to determine the burner tail gas temperature based on the specific heat capacity of the burner inlet mixed gas and the specific heat capacity of the burner outlet mixed gas.

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

10. A computer-readable storage medium, characterized in that, The device stores computer-executable instructions for performing the method as described in any one of claims 1 to 7.

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