Gas path model establishing method, device and equipment and storage medium

Abstract

The invention discloses a gas path model establishing method and device, equipment and a storage medium. The method comprises the steps that a pipeline model is established according to the attributes of a pipeline, the input parameters of the pipeline model are the pipeline air inlet temperature, the pipeline air inlet flow and the pipeline exhaust flow of the pipeline model, and the output parameters of the pipeline model are the pipeline gas temperature and the pipeline gas pressure of the pipeline model; a valve body model is established according to the attributes of the valve body, the input parameters of the valve body model are the valve body air inlet temperature, the valve body air inlet pressure and the valve body exhaust pressure of the valve body model, and the output parameters of the valve body model are the valve body exhaust temperature and the valve body exhaust flow of the valve body model; and alternately connecting the at least one pipeline model and the at least one valve body model to obtain a gas path model. According to the embodiment of the invention, the method can achieve the quick modeling of the gas path system, improves the accuracy of a gas path model, and carries out the function testing.

Description

Technical Field

[0001] The present application belongs to the technical field of gas path models, and in particular, relates to a method, device, equipment and storage medium for establishing a gas path model. Background Art

[0002] The oxygen supply system and hydrogen supply system of the fuel cell are one of the core contents of the control and monitoring of the fuel cell controller. During the test of the gas path system in the oxygen supply system and the hydrogen supply system, the fuel cell controller will establish a gas path system model, simulate various working conditions in the gas path system model, control each valve body of the gas path system model, and monitor the gas characteristics in the gas path system model through virtual sensors.

[0003] However, the gas path system models in related technologies are mostly open-loop models, that is, the simulation data collected by each virtual sensor is simulated by a fixed value or fixed curve set in advance, and each data is independent of each other. The accuracy of the gas path model generated only by analyzing independent point data is low. Summary of the invention

[0004] The embodiments of the present application provide a method, device, equipment and storage medium for establishing a gas path model, which can solve the problem of low accuracy of existing gas path models.

[0005] In a first aspect, an embodiment of the present application provides a method for establishing a gas path model, the method comprising:

[0006] A pipeline model is established according to the properties of the pipeline, wherein the input parameters of the pipeline model are the pipeline intake temperature, the pipeline intake flow rate and the pipeline exhaust flow rate of the pipeline model, and the output parameters are the pipeline gas temperature and the pipeline gas pressure of the pipeline model;

[0007] A valve body model is established according to the properties of the valve body, wherein the input parameters of the valve body model are the valve body intake temperature, the valve body intake pressure and the valve body exhaust pressure of the valve body model, and the output parameters of the valve body model are the valve body exhaust temperature and the valve body exhaust flow rate of the valve body model;

[0008] At least one of the pipeline models and at least one of the valve body models are alternately connected to obtain a gas path model.

[0009] In some embodiments, after alternately connecting at least one of the pipeline models and at least one of the valve body models to obtain a gas path model, the method further includes:

[0010] Acquiring gas path input parameters input into the gas path model;

[0011] The gas circuit input parameters are used as input parameters of the first sub-model alternately connected in the gas circuit model, and the output parameters of each sub-model are used as input parameters of the next sub-model alternately connected, and the sub-model is a valve body model or a pipeline model.

[0012] In some embodiments, after alternately connecting at least one of the pipeline models and at least one of the valve body models to obtain a gas path model, the method further includes:

[0013] For a first pipeline model, receiving a first pipeline intake air flow rate and a first pipeline intake air temperature input into the first pipeline model, wherein the first pipeline model is any one of the at least one pipeline model;

[0014] determining a first pipeline exhaust temperature in the first pipeline model according to the first pipeline intake temperature and a first temperature variable and a second temperature variable, wherein the first temperature variable is determined based on energy conservation, and the second temperature variable is determined based on an ambient temperature of the pipeline model;

[0015] determining the exhaust pressure of the first pipeline according to the exhaust temperature of the first pipeline and the intake air flow rate of the first pipeline;

[0016] Output the first pipeline exhaust temperature and the first pipeline exhaust pressure.

[0017] In some embodiments, before determining the first pipeline exhaust temperature in the first pipeline model according to the first pipeline intake temperature and the first temperature variable and the second temperature variable, the method further includes:

[0018] Acquire a first pipeline exhaust flow rate of the first pipeline model and an ambient temperature of the first pipeline model;

[0019] Determining the gas mass in the first pipeline model according to the exhaust flow rate of the first pipeline and the intake flow rate of the first pipeline;

[0020] The first temperature variable and the second temperature variable are determined according to the ambient temperature, the first pipeline exhaust flow rate, the first pipeline intake flow rate, the gas mass, and the first pipeline intake temperature.

[0021] In some embodiments, determining the first pipeline exhaust pressure according to the first pipeline exhaust temperature and the first pipeline intake air flow rate includes:

[0022] Acquire a first pipeline exhaust flow rate of the first pipeline model and a gas volume in the first pipeline model;

[0023] Determining the gas mass in the first pipeline model according to the exhaust flow rate of the first pipeline and the intake flow rate of the first pipeline;

[0024] The first pipeline exhaust pressure is determined according to the gas mass, the gas volume, and the first pipeline exhaust temperature.

[0025] In some embodiments, after alternately connecting at least one of the pipeline models and at least one of the valve body models to obtain a gas path model, the method further includes:

[0026] For a first valve body model, receiving a first valve body intake temperature and a first valve body intake pressure input into the first valve body model, wherein the first valve body model is any one of the at least one valve body model;

[0027] Determine the first valve body exhaust temperature and the first valve body exhaust flow rate according to the first valve body intake temperature, the first valve body intake pressure and the first valve body exhaust pressure;

[0028] The first valve body exhaust temperature and the first valve body exhaust flow rate are output.

[0029] In some embodiments, determining the first valve body exhaust temperature and the first valve body exhaust flow rate according to the first valve body intake temperature, the first valve body intake pressure, and the first valve body exhaust pressure includes:

[0030] Acquire a first valve body exhaust pressure of the first valve body model and a valve port opening area of ​​the first valve body model;

[0031] Obtaining a first quotient of the exhaust pressure of the first valve body divided by the intake pressure of the first valve body;

[0032] determining the first valve body exhaust temperature according to the first quotient and the first valve body intake temperature;

[0033] The exhaust flow rate of the first valve body is determined according to the first valve body intake temperature, the first quotient and the valve port opening area.

[0034] In a second aspect, an embodiment of the present application provides a device for establishing a gas path model, the device comprising:

[0035] A first modeling module is used to establish a pipeline model according to the properties of the pipeline, wherein the input parameters of the pipeline model are the pipeline intake temperature, pipeline intake flow rate and pipeline exhaust flow rate of the pipeline model, and the output parameters are the pipeline gas temperature and pipeline gas pressure of the pipeline model;

[0036] A second modeling module is used to establish a valve body model according to the properties of the valve body, wherein the input parameters of the valve body model are the valve body intake temperature, the valve body intake pressure and the valve body exhaust pressure of the valve body model, and the output parameters of the valve body model are the valve body exhaust temperature and the valve body exhaust flow rate of the valve body model;

[0037] The connection module is used to alternately connect at least one of the pipeline models and at least one of the valve body models to obtain a gas path model.

[0038] In a third aspect, an embodiment of the present application provides a device for establishing a gas path model, the device comprising: a processor and a memory storing computer program instructions;

[0039] The above method for establishing the gas path model is implemented when the processor executes the computer program instructions.

[0040] In a fourth aspect, an embodiment of the present application provides a computer storage medium having computer program instructions stored thereon, and when the computer program instructions are executed by a processor, the method for establishing a gas path model as described above is implemented.

[0041] In a fifth aspect, an embodiment of the present application provides a computer program product, which includes computer program instructions, and when the computer program instructions are executed by a processor, the method for establishing a gas path model as described above is implemented.

[0042] In the present application, a gas circuit model can be established based on the composition of the gas circuit. Since the actual gas circuit is composed of a pipeline and a valve body arranged in the pipeline, a pipeline model can be established according to the properties of the pipeline, and a valve body model can be established according to the properties of the valve body. Then, a section of the pipeline between every two valve bodies in the gas circuit is determined as a pipeline model. Then, at least one pipeline model and at least one valve body model can be alternately connected according to the actual conditions of the gas circuit to obtain the final gas circuit model. By inputting the intake flow rate and intake temperature into the gas circuit model, the output exhaust flow rate and exhaust temperature can be obtained. Since the gas circuit model in the present application is not modeled based solely on the data obtained from the bench experiment, but is modeled based on the actual gas circuit state, the properties of the pipeline in the gas circuit, the properties of the valve body, and the connection method between the pipeline and the valve body, the working condition coverage and accuracy of the output data of the gas circuit model can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 It is a flow chart of a method for establishing a gas path model provided in one embodiment of the present application;

[0045] Figure 2 It is a structural schematic diagram of a device for establishing a gas path model provided in one embodiment of the present application;

[0046] Figure 3 is a structural schematic diagram of a device for establishing a gas path model provided in another embodiment of the present application;

[0047] Figure 4 It is a schematic diagram of the hardware structure of a gas path model establishment device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0048] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0050] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The embodiments will be described in detail below in conjunction with the accompanying drawings.

[0051] Specifically, in order to solve the problems of the prior art, the embodiments of the present application provide a method, device, equipment and storage medium for establishing a gas path model. The method for establishing a gas path model provided in the embodiments of the present application is first introduced below.

[0052] Figure 1A flow chart of a method for establishing a gas path model provided by an embodiment of the present application is shown. The method comprises the following steps:

[0053] S110, establishing a pipeline model according to the properties of the pipeline, wherein the input parameters of the pipeline model are the pipeline intake temperature, pipeline intake flow rate and pipeline exhaust flow rate of the pipeline model, and the output parameters are the pipeline gas temperature and pipeline gas pressure of the pipeline model.

[0054] In this embodiment, the gas circuit generally includes multiple pipelines and multiple valve bodies. The pipeline is a pipeline network in the gas circuit for conveying gas. The valve body is a control element in the gas circuit for controlling the flow of gas. The valve body may include a three-way valve, a back pressure valve, a tail exhaust valve, and a hydrogen exhaust valve.

[0055] For example, the gas circuit in the present application can be a gas circuit in a hydrogen supply system in a fuel cell or a gas circuit in an oxygen supply system. The gas circuit in the hydrogen supply system can be a gas circuit between a hydrogen storage tank and a fuel cell stack, and the gas circuit in the oxygen supply system can be a gas circuit between an air compressor and a fuel cell stack. The gas circuit includes multiple valve bodies, each valve body corresponds to a valve body model, and a section of pipeline between any two adjacent valve bodies can correspond to a pipeline model.

[0056] A pipeline model is a mathematical model used to describe and analyze the flow of gas in a pipeline. The pipeline model can be established based on the pipeline's geometric shape, size, material, inner surface state and other properties as well as the properties of the fluid.

[0057] For example, the gases corresponding to the pipeline model are hydrogen and oxygen. The pipeline model can be used to analyze the changes in gas pressure and temperature in the pipeline. Therefore, the pipeline model can be established based on the principle of conservation of energy and the heat exchange between the gas through the pipe wall and the environment.

[0058] S120, establishing a valve body model according to the properties of the valve body, wherein the input parameters of the valve body model are the valve body intake temperature, valve body intake pressure and valve body exhaust pressure of the valve body model, and the output parameters of the valve body model are the valve body exhaust temperature and valve body exhaust flow rate of the valve body model.

[0059] In this embodiment, the valve body model refers to a mathematical model used to describe and analyze the role and performance of the valve body in the gas circuit. The valve body model can be established based on the type, structure, working principle, pressure loss, flow characteristics and other properties of the valve body. Specifically, the valve body model in this embodiment is applicable to all types of valve bodies in this application.

[0060] For example, the valve body model can be used to analyze the gas flow and temperature changes in the valve body. Therefore, according to the valve port structure, the valve body can be equivalent to a gradually converging and expanding tube. At the same time, it is assumed that the gas flow through the valve port is an isentropic adiabatic process, so as to establish the valve body model.

[0061] S130, alternately connecting at least one of the pipeline models and at least one of the valve body models to obtain a gas path model.

[0062] In this embodiment, since each valve body corresponds to a valve body model and a section of pipeline between every two adjacent valve bodies corresponds to a pipeline model, at least one pipeline model and at least one valve body model can be alternately connected based on the actual situation of the gas path to obtain a gas path model.

[0063] For example, in the process of modeling the gas circuit, it can be assumed that the materials of each section of the pipeline are the same, the shape structure is a regular cavity, and the pipeline installation position is ignored, but the cavity volume and heat transfer thermal resistance in the pipeline can be set. Each valve body is equivalent to a tapered tube, and the valve port area can be set. The oxygen or hydrogen in the gas circuit is assumed to be an ideal gas.

[0064] Taking the gas path model of the hydrogen supply system or the gas path model of the oxygen supply system in the fuel cell as an example, the embodiment Figure 2 As shown, the first sub-model alternately connected in the gas circuit model is a pipeline model, and the last sub-model is a valve body model. The first pipeline model in the gas circuit model is connected to the model corresponding to the hydrogen storage tank or the air compressor, and the last valve body model in the gas circuit model is connected to the stack model corresponding to the fuel cell stack. In this way, the model corresponding to the hydrogen storage tank or the air compressor can use the gas flow rate output by the model as the gas circuit intake flow rate of the gas circuit model, and the output temperature as the gas circuit intake temperature of the gas circuit model. The gas circuit intake flow rate and gas circuit intake temperature are passed through at least one pipeline model and at least one valve body model alternately connected to obtain the output gas circuit exhaust flow rate and gas circuit exhaust temperature, and the gas circuit exhaust flow rate and gas circuit exhaust temperature are used as the input of the stack model.

[0065] In addition, any two connected valve body models and pipeline models can be connected to the corresponding auxiliary parts model. The auxiliary parts may include filters, intercoolers, humidifiers, ejectors, gas-liquid separators and other accessories. The auxiliary parts model can modify the parameters in the gas circuit model.

[0066] In this embodiment, a gas circuit model can be established based on the composition of the gas circuit. Since the actual gas circuit is composed of a pipeline and a valve body arranged in the pipeline, a pipeline model can be established according to the properties of the pipeline, and a valve body model can be established according to the properties of the valve body. Then, a section of the pipeline between every two valve bodies in the gas circuit is determined as a pipeline model. Then, at least one pipeline model and at least one valve body model can be alternately connected according to the actual conditions of the gas circuit to obtain the final gas circuit model. By inputting the intake flow rate and intake temperature into the gas circuit model, the output exhaust flow rate and exhaust temperature can be obtained. Since the gas circuit model in this application is not modeled based solely on the data obtained from the bench experiment, but is modeled based on the actual gas circuit state, the properties of the pipeline in the gas circuit, the properties of the valve body, and the connection method between the pipeline and the valve body, the working condition coverage and accuracy of the output data of the gas circuit model can be improved.

[0067] As an optional embodiment, after alternately connecting at least one of the pipeline models and at least one of the valve body models to obtain a gas path model, the method further includes:

[0068] Acquiring gas path input parameters input into the gas path model;

[0069] The gas circuit input parameters are used as input parameters of the first sub-model alternately connected in the gas circuit model, and the output parameters of each sub-model are used as input parameters of the next sub-model alternately connected, and the sub-model is a valve body model or a pipeline model.

[0070] In this embodiment, since the gas circuit model includes multiple alternately connected pipeline models and valve body models, the input parameters of each valve body model in the gas circuit model are the valve body intake temperature, the valve body intake pressure and the valve body exhaust pressure, and the output parameters are the valve body exhaust temperature and the valve body exhaust flow rate; the input parameters of each pipeline model are the pipeline intake temperature, the pipeline intake flow rate and the pipeline exhaust flow rate, and the output parameters are the pipeline exhaust pressure and the pipeline exhaust temperature.

[0071] As an optional embodiment, Figure 2 As shown, the pipeline model at the air inlet end in the gas path model is determined as the first pipeline model, and the valve body model at the exhaust end is determined as the last valve body model. Then the air path intake flow and air path intake temperature are the pipeline intake flow and pipeline intake temperature of the first pipeline model. The first pipeline model can generate output parameters based on the air path intake flow and air path intake temperature, and use its output parameters as input parameters of the next valve body model connected to the pipeline model. In this way, data will be transmitted among multiple interconnected sub-models, and the valve body exhaust temperature and valve body exhaust flow output from the last valve body model can be used as the air path exhaust temperature and air path exhaust flow of the gas path model.

[0072] In the embodiment of the present application, since the modeling methods of the pipeline model and the valve body model both include the gas mass, temperature, and pressure calculation functions within the module and the interface of the model, they are not limited to a certain modeling software or tool, thereby improving the versatility of the model.

[0073] As an optional embodiment, after alternately connecting at least one of the pipeline models and at least one of the valve body models to obtain a gas path model, the method further includes:

[0074] For a first pipeline model, receiving a first pipeline intake air flow rate and a first pipeline intake air temperature input into the first pipeline model, wherein the first pipeline model is any one of the at least one pipeline model;

[0075] determining a first pipeline exhaust temperature in the first pipeline model according to the first pipeline intake temperature and a first temperature variable and a second temperature variable, wherein the first temperature variable is determined based on energy conservation, and the second temperature variable is determined based on an ambient temperature of the pipeline model;

[0076] determining the exhaust pressure of the first pipeline according to the exhaust temperature of the first pipeline and the intake air flow rate of the first pipeline;

[0077] Output the first pipeline exhaust temperature and the first pipeline exhaust pressure.

[0078] In this embodiment, for each first pipeline model, the first pipeline intake flow rate and the first pipeline intake temperature can be received. Then, based on the law of conservation of energy, the first temperature variable in the pipeline can be determined according to the size of the pipeline inlet and outlet flow rates; and based on the heat exchange between the gas in the pipeline and the environment through the pipe wall, the second temperature variable caused by the heat exchange in the heat exchange process can be determined according to the heat transfer efficiency. The first pipeline intake temperature, the first temperature variable and the second temperature variable are added together, and the sum obtained can be used as the first pipeline exhaust temperature of the first pipeline model.

[0079] After determining the exhaust temperature of the first pipeline, the first pipeline exhaust pressure of the first pipeline can also be obtained. The gas mass in the first pipeline can be calculated through the first pipeline exhaust flow and the first pipeline intake flow. After knowing the first pipeline exhaust temperature and the gas mass, the hydrogen or air in the pipe can be regarded as an ideal gas, and the first pipeline exhaust pressure of the first pipeline model can be calculated through the ideal gas state equation.

[0080] After the first pipeline exhaust temperature and the first pipeline exhaust pressure are obtained, the first pipeline exhaust temperature and the first pipeline exhaust pressure may be output to a next valve body model of the first pipeline model.

[0081] In this way, based on the established pipeline model analysis and calculation model parameter changes, since the modeling is based on the physical characteristics of the pipeline, the pipeline model takes into account the physical characteristics of the pipeline itself, and is more closely related to the actual pipeline. It also analyzes from the properties of the fluid, combined with energy conservation and flow characteristics such as heat exchange, which can improve the accuracy of the model and make the pipeline model more stable and reliable.

[0082] As an optional embodiment, before determining the first pipeline exhaust temperature in the first pipeline model according to the first pipeline intake temperature, the first temperature variable and the second temperature variable, the method further includes:

[0083] Acquire a first pipeline exhaust flow rate of the first pipeline model and an ambient temperature of the first pipeline model;

[0084] Determining the gas mass in the first pipeline model according to the exhaust flow rate of the first pipeline and the intake flow rate of the first pipeline;

[0085] The first temperature variable and the second temperature variable are determined according to the ambient temperature, the first pipeline exhaust flow rate, the first pipeline intake flow rate, the gas mass, and the first pipeline intake temperature.

[0086] In this embodiment, the valve body exhaust flow output by the valve body model after the first pipeline model is used as the first pipeline exhaust flow of the first pipeline model. Then, the flow difference between the first pipeline intake flow and the first pipeline exhaust flow is integrated to simulate the gas mass in the first pipeline model.

[0087] m=∫Q I -Q O

[0088] Where m represents the gas mass, Q I Indicates the intake air flow rate of the first pipeline, Q O Indicates the exhaust flow rate of the first pipeline.

[0089] After obtaining the gas mass, the first temperature variable and the second temperature variable may be further calculated. Specifically:

[0090] T=T I +ΔT1+ΔT2

[0091]

[0092] Where m represents the gas mass, Q I Indicates the intake air flow rate of the first pipeline, Q O Indicates the exhaust flow rate of the first pipeline, T I Indicates the first pipeline intake temperature, T OIndicates the exhaust temperature of the first pipeline, C p is the specific heat capacity at constant pressure; C v is the specific heat at constant volume; T Amb is the ambient temperature, T represents the gas temperature in the first pipeline model, and can also be regarded as the exhaust temperature of the first pipeline, R T is the equivalent thermal resistance of the gas passing through the tube wall and the environment for heat exchange, ΔT1 is the first temperature variable, and ΔT2 is the second temperature variable.

[0093] By using the above formula, the first temperature variable and the second temperature variable can be calculated, and then the first pipeline exhaust temperature can be calculated.

[0094] Since the above formula simulates the state of the real pipeline, it takes into account the conversion of different energy forms in the pipeline and the heat exchange inside and outside the pipeline. Therefore, the calculated temperature variable and the exhaust temperature of the pipeline are more accurate.

[0095] As an optional embodiment, determining the first pipeline exhaust pressure according to the first pipeline exhaust temperature and the first pipeline intake flow rate includes:

[0096] Acquire a first pipeline exhaust flow rate of the first pipeline model and a gas volume in the first pipeline model;

[0097] Determining the gas mass in the first pipeline model according to the exhaust flow rate of the first pipeline and the intake flow rate of the first pipeline;

[0098] The first pipeline exhaust pressure is determined according to the gas mass, the gas volume, and the first pipeline exhaust temperature.

[0099] In this embodiment, the exhaust flow of the first pipeline and the gas volume in the first pipeline model can be obtained, wherein the gas volume can be calculated based on the geometric shape of the pipeline simulated by the first pipeline model, and can also be derived from the pressure and temperature of the gas in the pipeline.

[0100] Similarly, the flow difference between the first pipeline intake flow and the first pipeline exhaust flow can be integrated to simulate the gas mass in the first pipeline model. Then, the gas pressure in the pipeline is calculated by the following ideal gas state equation, and the gas pressure in the pipeline is used as the first pipeline exhaust pressure.

[0101]

[0102] Where m represents the gas mass, R g is the molar gas constant, R is the gas constant, M mis the molar mass of the gas. T is the exhaust temperature of the first pipeline, V is the volume of the gas in the pipeline, and P is the exhaust pressure of the first pipeline in the pipeline.

[0103] In this way, the pressure of the gas discharged from the pipeline can be inferred based on the properties of the gas in the pipeline, so that the accuracy of the exhaust pressure of the pipeline is higher.

[0104] As an optional embodiment, after alternately connecting at least one of the pipeline models and at least one of the valve body models to obtain a gas path model, the method further includes:

[0105] For a first valve body model, receiving a first valve body intake temperature and a first valve body intake pressure input into the first valve body model, wherein the first valve body model is any one of the at least one valve body model;

[0106] Determine the first valve body exhaust temperature and the first valve body exhaust flow rate according to the first valve body intake temperature, the first valve body intake pressure and the first valve body exhaust pressure;

[0107] The first valve body exhaust temperature and the first valve body exhaust flow rate are output.

[0108] In this embodiment, for each first valve body model, the first valve body intake pressure, the first valve body exhaust temperature and the first valve body intake temperature can be received. Then, based on the structure of the valve body, the valve body can be equivalent to a gradually converging and expanding tube, and the process of gas flowing through the valve body can be equivalent to an isentropic adiabatic process, so that the gas flow in the valve body can be calculated by the isentropic adiabatic flow equation, and the gas flow in the valve body can be output as the first valve body exhaust flow.

[0109] In addition, in the process of analyzing the gas temperature, the process of gas flowing through the valve body can be simplified to an adiabatic reversible process of an ideal gas. When the exhaust pressure of the first valve body is less than the intake pressure of the first valve body, the corresponding gas temperature will also decrease. In this way, the exhaust temperature of the first valve body can be calculated.

[0110] In this way, based on the established valve body model analysis and calculation model parameter changes, since the modeling is based on the physical properties of the valve body, the valve body model takes into account the physical properties of the valve body itself, and is more closely related to the actual valve body. It also analyzes from the properties of the fluid, which can improve the accuracy of the model and make the valve body model have higher stability and reliability.

[0111] As an optional embodiment, determining the first valve body exhaust temperature and the first valve body exhaust flow rate according to the first valve body intake temperature, the first valve body intake pressure and the first valve body exhaust pressure includes:

[0112] Acquire a first valve body exhaust pressure of the first valve body model and a valve port opening area of ​​the first valve body model;

[0113] Obtaining a first quotient of the exhaust pressure of the first valve body divided by the intake pressure of the first valve body;

[0114] determining the first valve body exhaust temperature according to the first quotient and the first valve body intake temperature;

[0115] The exhaust flow rate of the first valve body is determined according to the first valve body intake temperature, the first quotient and the valve port opening area.

[0116] As an optional embodiment, the pipeline exhaust pressure output by the pipeline model after the first valve body model is used as the first valve body exhaust pressure of the first valve body model. After obtaining the first valve body exhaust pressure, the first valve body exhaust temperature can be calculated:

[0117] Among them, T O ' is the exhaust temperature of the first valve body, T I ' is the first valve body intake temperature, P I is the first valve body inlet pressure; P O is the exhaust pressure of the first valve body; k is the gas adiabatic index,

[0118] Through the above formula, the change of gas temperature can be inferred from the change of gas pressure of the gas in the first valve body model.

[0119] In addition, the exhaust flow of the first valve body can also be calculated:

[0120]

[0121]

[0122] Where Q is the exhaust flow of the first valve body, A is the valve opening area, k is the gas adiabatic index, P I is the first valve body inlet pressure; P O is the exhaust pressure of the first valve body, T I ' is the first valve body intake temperature.

[0123] In this way, the gas flow rate and gas temperature discharged from the pipeline can be inferred based on the properties of the gas in the pipeline, so that the calculation result is more accurate.

[0124] Based on the method for establishing the gas path model provided in the above embodiment, the present application also provides a specific implementation of a device for establishing the gas path model. Please refer to the following embodiment.

[0125] See first Figure 3The gas path model establishment device 300 provided in the embodiment of the present application includes the following modules:

[0126] The first modeling module 301 is used to establish a pipeline model according to the properties of the pipeline, wherein the input parameters of the pipeline model are the pipeline intake temperature, pipeline intake flow rate and pipeline exhaust flow rate of the pipeline model, and the output parameters are the pipeline gas temperature and pipeline gas pressure of the pipeline model;

[0127] The second modeling module 302 is used to establish a valve body model according to the properties of the valve body, wherein the input parameters of the valve body model are the valve body intake temperature, the valve body intake pressure and the valve body exhaust pressure of the valve body model, and the output parameters of the valve body model are the valve body exhaust temperature and the valve body exhaust flow rate of the valve body model;

[0128] The connection module 303 is used to alternately connect at least one of the pipeline models and at least one of the valve body models to obtain a gas path model.

[0129] The device can establish a gas circuit model based on the composition of the gas circuit. Since the actual gas circuit is composed of a pipeline and a valve body arranged in the pipeline, a pipeline model can be established according to the properties of the pipeline, and a valve body model can be established according to the properties of the valve body. Then, a section of the pipeline between every two valve bodies in the gas circuit is determined as a pipeline model. Then, at least one pipeline model and at least one valve body model can be alternately connected according to the actual condition of the gas circuit to obtain the final gas circuit model. By inputting the intake flow rate and intake temperature into the gas circuit model, the output exhaust flow rate and exhaust temperature can be obtained. Since the gas circuit model in this application is not modeled based solely on the data obtained from the bench experiment, but is modeled based on the actual gas circuit state, the properties of the pipeline in the gas circuit, the properties of the valve body, and the connection method between the pipeline and the valve body, the working condition coverage and accuracy of the output data of the gas circuit model can be improved.

[0130] As an implementation of the present application, the gas path model establishment device 200 may further include:

[0131] An acquisition module, used for acquiring gas path input parameters input into the gas path model;

[0132] The model operation unit is used to use the gas circuit input parameter as the input parameter of the first sub-model connected alternately in the gas circuit model, and the output parameter of each sub-model is the input parameter of the next sub-model connected alternately, and the sub-model is a valve body model or a pipeline model.

[0133] As an implementation of the present application, the gas path model establishment device 300 can also be used for:

[0134] For a first pipeline model, receiving a first pipeline intake air flow rate and a first pipeline intake air temperature input into the first pipeline model, wherein the first pipeline model is any one of the at least one pipeline model;

[0135] determining a first pipeline exhaust temperature in the first pipeline model according to the first pipeline intake temperature and a first temperature variable and a second temperature variable, wherein the first temperature variable is determined based on energy conservation, and the second temperature variable is determined based on an ambient temperature of the pipeline model;

[0136] determining the exhaust pressure of the first pipeline according to the exhaust temperature of the first pipeline and the intake air flow rate of the first pipeline;

[0137] The first pipeline exhaust temperature and the first pipeline exhaust pressure are output.

[0138] As an implementation of the present application, the gas path model establishment device 300 can also be used for:

[0139] Acquire a first pipeline exhaust flow rate of the first pipeline model and an ambient temperature of the first pipeline model;

[0140] Determining the gas mass in the first pipeline model according to the exhaust flow rate of the first pipeline and the intake flow rate of the first pipeline;

[0141] The first temperature variable and the second temperature variable are determined according to the ambient temperature, the first pipeline exhaust flow rate, the first pipeline intake flow rate, the gas mass, and the first pipeline intake temperature.

[0142] As an implementation of the present application, the gas path model establishment device 300 can also be used for:

[0143] Acquire a first pipeline exhaust flow rate of the first pipeline model and a gas volume in the first pipeline model;

[0144] Determining the gas mass in the first pipeline model according to the exhaust flow rate of the first pipeline and the intake flow rate of the first pipeline;

[0145] The first pipeline exhaust pressure is determined according to the gas mass, the gas volume, and the first pipeline exhaust temperature.

[0146] As an implementation of the present application, the gas path model establishment device 300 can also be used for:

[0147] For a first valve body model, receiving a first valve body intake temperature and a first valve body intake pressure input into the first valve body model, wherein the first valve body model is any one of the at least one valve body model;

[0148] Determine the first valve body exhaust temperature and the first valve body exhaust flow rate according to the first valve body intake temperature, the first valve body intake pressure and the first valve body exhaust pressure;

[0149] The first valve body exhaust temperature and the first valve body exhaust flow rate are output.

[0150] As an implementation of the present application, the gas path model establishment device 300 can also be used for:

[0151] Acquire a first valve body exhaust pressure of the first valve body model and a valve port opening area of ​​the first valve body model;

[0152] Obtaining a first quotient of the exhaust pressure of the first valve body divided by the intake pressure of the first valve body;

[0153] determining the first valve body exhaust temperature according to the first quotient and the first valve body intake temperature;

[0154] The exhaust flow rate of the first valve body is determined according to the first valve body intake temperature, the first quotient and the valve port opening area.

[0155] The gas path model establishment device provided in the embodiment of the present invention can implement each step in the above method embodiment, and will not be described again here to avoid repetition.

[0156] Figure 4 A schematic diagram of the hardware structure of a gas path model establishment device provided in an embodiment of the present application is shown.

[0157] The gas path model building device may include a processor 401 and a memory 402 storing computer program instructions.

[0158] Specifically, the processor 401 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0159] The memory 402 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 402 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, the memory 402 may include a removable or non-removable (or fixed) medium. In appropriate cases, the memory 402 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 402 is a non-volatile solid-state memory.

[0160] The memory may include read-only memory (ROM), random access memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical or other physical / tangible memory storage devices. Thus, typically, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to an aspect of the present disclosure.

[0161] The processor 401 reads and executes the computer program instructions stored in the memory 402 to implement any one of the gas path model establishment methods in the above embodiments.

[0162] In one example, the gas path model establishment device may further include a communication interface 403 and a bus 410. Figure 3 As shown, the processor 401, the memory 402, and the communication interface 403 are connected via a bus 410 and communicate with each other.

[0163] The communication interface 403 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0164] Bus 410 includes hardware, software or both, and the parts of the equipment of the gas path model are coupled to each other.For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front side bus (FSB), hypertransmission (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In suitable cases, bus 410 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the application considers any suitable bus or interconnection.

[0165] The device for establishing the gas path model may be based on the above-mentioned embodiment, thereby realizing the method and device for establishing the gas path model in combination with the above-mentioned embodiment.

[0166] In addition, in combination with the method for establishing the gas path model in the above-mentioned embodiment, the embodiment of the present application may provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any one of the methods for establishing the gas path model in the above-mentioned embodiments is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here. Among them, the above-mentioned computer-readable storage medium may include a non-transitory computer-readable storage medium, such as a read-only memory (Read-Only Memory, referred to as ROM), a random access memory (Random Access Memory, referred to as RAM), a disk or an optical disk, etc., which is not limited here.

[0167] In addition, an embodiment of the present application further provides a computer program product, including computer program instructions, which can implement the steps and corresponding contents of the aforementioned method embodiment when the computer program instructions are executed by a processor.

[0168] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0169] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0170] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0171] Aspects of the present disclosure are described above with reference to the flowchart and / or block diagram of the method, device and computer program product according to the embodiment of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0172] The above are only specific implementation methods of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A method for establishing a gas path model, characterized in that: The method comprises: A pipeline model is established according to the properties of the pipeline, wherein the input parameters of the pipeline model are the pipeline intake temperature, the pipeline intake flow rate and the pipeline exhaust flow rate of the pipeline model, and the output parameters are the pipeline gas temperature and the pipeline gas pressure of the pipeline model; A valve body model is established according to the properties of the valve body, wherein the input parameters of the valve body model are the valve body intake temperature, the valve body intake pressure and the valve body exhaust pressure of the valve body model, and the output parameters of the valve body model are the valve body exhaust temperature and the valve body exhaust flow rate of the valve body model; At least one of the pipeline models and at least one of the valve body models are alternately connected to obtain a gas path model.

2. The method for establishing a gas path model according to claim 1, characterized in that: After alternately connecting at least one of the pipeline models and at least one of the valve body models to obtain a gas path model, the method further includes: Acquiring gas path input parameters input into the gas path model; The gas circuit input parameters are used as input parameters of the first sub-model alternately connected in the gas circuit model, and the output parameters of each sub-model are used as input parameters of the next sub-model alternately connected, and the sub-model is a valve body model or a pipeline model.

3. The method for establishing a gas path model according to claim 1, characterized in that: After alternately connecting at least one of the pipeline models and at least one of the valve body models to obtain a gas path model, the method further includes: For a first pipeline model, receiving a first pipeline intake air flow rate and a first pipeline intake air temperature input into the first pipeline model, wherein the first pipeline model is any one of the at least one pipeline model; determining a first pipeline exhaust temperature in the first pipeline model according to the first pipeline intake temperature and a first temperature variable and a second temperature variable, wherein the first temperature variable is determined based on energy conservation, and the second temperature variable is determined based on an ambient temperature of the pipeline model; determining the exhaust pressure of the first pipeline according to the exhaust temperature of the first pipeline and the intake air flow rate of the first pipeline; The first pipeline exhaust temperature and the first pipeline exhaust pressure are output.

4. The method for establishing a gas path model according to claim 3, characterized in that: Before determining the first pipeline exhaust temperature in the first pipeline model according to the first pipeline intake temperature and the first temperature variable and the second temperature variable, the method further includes: Acquire a first pipeline exhaust flow rate of the first pipeline model and an ambient temperature of the first pipeline model; Determining the gas mass in the first pipeline model according to the exhaust flow rate of the first pipeline and the intake flow rate of the first pipeline; The first temperature variable and the second temperature variable are determined according to the ambient temperature, the first pipeline exhaust flow rate, the first pipeline intake flow rate, the gas mass, and the first pipeline intake temperature.

5. The method for establishing a gas path model according to claim 3, characterized in that: The determining the exhaust pressure of the first pipeline according to the exhaust temperature of the first pipeline and the intake air flow rate of the first pipeline includes: Acquire a first pipeline exhaust flow rate of the first pipeline model and a gas volume in the first pipeline model; Determining the gas mass in the first pipeline model according to the exhaust flow rate of the first pipeline and the intake flow rate of the first pipeline; The first pipeline exhaust pressure is determined according to the gas mass, the gas volume, and the first pipeline exhaust temperature.

6. The method for establishing a gas path model according to claim 1, characterized in that: After alternately connecting at least one of the pipeline models and at least one of the valve body models to obtain a gas path model, the method further includes: For a first valve body model, receiving a first valve body intake temperature and a first valve body intake pressure input into the first valve body model, wherein the first valve body model is any one of the at least one valve body model; Determine a first valve body exhaust temperature and a first valve body exhaust flow rate according to the first valve body intake temperature, the first valve body intake pressure, and the first valve body exhaust pressure; The first valve body exhaust temperature and the first valve body exhaust flow rate are output.

7. The method for establishing a gas path model according to claim 6, characterized in that: The determining the first valve body exhaust temperature and the first valve body exhaust flow rate according to the first valve body intake temperature, the first valve body intake pressure and the first valve body exhaust pressure comprises: Acquire a first valve body exhaust pressure of the first valve body model and a valve port opening area of ​​the first valve body model; Obtaining a first quotient of the exhaust pressure of the first valve body divided by the intake pressure of the first valve body; determining the first valve body exhaust temperature according to the first quotient and the first valve body intake temperature; The exhaust flow rate of the first valve body is determined according to the first valve body intake temperature, the first quotient and the valve port opening area.

8. A device for establishing a gas path model, characterized in that: The device comprises: A first modeling module is used to establish a pipeline model according to the properties of the pipeline, wherein the input parameters of the pipeline model are the pipeline intake temperature, pipeline intake flow rate and pipeline exhaust flow rate of the pipeline model, and the output parameters are the pipeline gas temperature and pipeline gas pressure of the pipeline model; A second modeling module is used to establish a valve body model according to the properties of the valve body, wherein the input parameters of the valve body model are the valve body intake temperature, the valve body intake pressure and the valve body exhaust pressure of the valve body model, and the output parameters of the valve body model are the valve body exhaust temperature and the valve body exhaust flow rate of the valve body model; The connection module is used to alternately connect at least one of the pipeline models and at least one of the valve body models to obtain a gas path model.

9. A device for establishing a gas path model, characterized in that: The gas path model establishment device includes: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the method for establishing the gas path model as described in any one of claims 1-7 is implemented.

10. A computer storage medium, characterized in that: The computer storage medium stores computer program instructions, and when the computer program instructions are executed by the processor, the method for establishing the gas path model according to any one of claims 1 to 7 is implemented.

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