CN110080886B - Method and device for controlling fuel pressurization system - Google Patents
Method and device for controlling fuel pressurization system Download PDFInfo
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- CN110080886B CN110080886B CN201910303288.2A CN201910303288A CN110080886B CN 110080886 B CN110080886 B CN 110080886B CN 201910303288 A CN201910303288 A CN 201910303288A CN 110080886 B CN110080886 B CN 110080886B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
- F02C9/26—Control of fuel supply
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Abstract
The present application provides a method and apparatus for controlling a fuel pressurization system for improving the accuracy of controlling operating parameters of the fuel pressurization system. The method comprises the following steps: acquiring set first input parameters, wherein the first input parameters comprise fuel inlet temperature and fuel inlet pressure in a compressor of a fuel pressurization system; inputting a first input parameter into at least one preset model, and obtaining a first output parameter corresponding to the first input parameter in the fuel pressurization system; if it is determined that the first output parameter matches the preset output parameter, operation of the fuel pressurization system is controlled based on the first input parameter.
Description
Technical Field
The present application relates to the field of computer anti-simulation technologies, and in particular, to a method and an apparatus for controlling a fuel pressurization system.
Background
A gas turbine includes a fuel pressurization system, a compressor, a combustor, and a turbine. The air compressor pressurizes air, the pressurized air enters the combustion chamber, and the pressurized air and fuel are mixed and combusted to push the turbine to do work in a rotating mode. A fuel pressurization system is required to pressurize the fuel prior to its entry into the combustion chamber to allow for adequate combustion of the fuel and air.
Currently, the methods of controlling the operating parameters of a fuel pressurization system are generally as follows: operating parameters of the fuel pressurization system, such as fuel inlet pressure, main machine speed, Proportional Integral Derivative (PID) parameters, etc., of the fuel pressurization system are typically determined based on empirical values. It is apparent that such empirical control of fuel pressurization system operation may result in less accurate control of the fuel pressurization system.
Disclosure of Invention
The present application provides a method and apparatus for controlling a fuel pressurization system for improving the accuracy of controlling operating parameters of the fuel pressurization system.
In a first aspect, there is provided a method of controlling a fuel pressurization system including a compressor for effecting heat exchange between a coolant and a fuel and for pressurizing the fuel, the method comprising:
obtaining set first input parameters including a fuel inlet temperature and a fuel inlet pressure in the compressor of the fuel pressurization system;
inputting the first input parameter into at least one preset model, and obtaining a first output parameter corresponding to the first input parameter in the fuel pressurization system; wherein the first output parameter comprises a fuel outlet temperature and/or a fuel outlet pressure, the at least one model is for representing a correspondence between sample input parameters in sample data of the fuel pressurization system, the sample input parameters comprising a fuel inlet temperature and a fuel inlet pressure in the compressor, and sample output parameters in the sample data, the sample output parameters comprising a fuel outlet temperature and a fuel outlet pressure in the compressor;
and if the first output parameter is determined to be matched with the preset output parameter, controlling the operation of the fuel pressurizing system according to the first input parameter.
In the above scheme, before the operation of the fuel pressurization system is controlled according to the first input parameter, the first output parameter corresponding to the first input parameter is obtained through the preset at least one model, and the first output parameter is determined to be matched with the preset output parameter, so that the first input parameter is ensured to meet the requirement. In addition, in the scheme, at least one model is established according to sample data in the actual operation process of the fuel pressurization system, so that the at least one model can be ensured to conform to the change condition of the actual operation process of the fuel pressurization system.
In one possible design, before obtaining the output parameter in the fuel pressurization system, the method includes:
acquiring a sample input parameter and a sample output parameter in the sample data;
establishing a correspondence between the sample input parameter and the sample output parameter, the correspondence being the at least one model of the fuel pressurization system.
In the above scheme, at least one model is obtained by respectively establishing the corresponding relationship between the sample input parameter of at least one component in the fuel pressurization system and the sample output parameter of at least one component, that is, each component in the fuel pressurization system corresponds to a corresponding model, so that the rationality of different first input parameters can be verified by corresponding to each component to the corresponding model, and the flexibility of controlling the operating parameters of the fuel pressurization system is improved.
In one possible design, establishing a correspondence between the sample input parameters and the sample output parameters includes:
determining a polytropic exponent of the compressor according to a fuel inlet temperature, a fuel outlet temperature, a fuel inlet pressure and a fuel outlet pressure in the compressor, wherein the polytropic exponent refers to a parameter of the compressor in a polytropic process of pressurizing the fuel;
establishing a first correspondence between the polytropic exponent and the sample data, the first correspondence being a first model of the at least one model.
In the scheme, the fuel compression process of the compressor is regarded as a variable process, and the variable exponent of the fuel compression system is obtained according to the sample data, so that the relation between the variable exponent and the sample data is obtained, the simulation modeling of the compression process of the compressor is realized, the first output value verified according to the model is more consistent with the real value of the compression process of the compressor, and the accuracy of controlling the working parameters of the fuel compression system is further improved.
In one possible design, the sample data further includes a coolant inlet temperature in the compressor and a wall temperature in the compressor, and the establishing of the correspondence between the sample input parameter and the sample output parameter includes:
obtaining an equivalent contact area according to the fuel inlet temperature, the wall surface temperature and the coolant outlet temperature, wherein the equivalent contact area is the contact area of the coolant and the fuel in the heat exchange process in the compressor;
establishing a second correspondence between the equivalent contact area and the fuel inlet temperature; wherein the second correspondence is a second model of the at least one model.
In the scheme, the equivalent contact area is obtained according to the sample data, so that the second corresponding relation between the equivalent contact area and the fuel inlet temperature is obtained, the simulation modeling of the heat exchange process of the compressor is realized, the first output value verified according to the model is more consistent with the actual value in the compression process of the compressor, and the accuracy of controlling the working parameters of the fuel pressurization system is further improved.
In one possible design, the fuel pressurization system comprises an air intake valve and a first circulating valve, a first port of the air intake valve is connected with a fuel supply port of the fuel pressurization system, a second port of the air intake valve is connected with a fuel inlet port of the compressor, a third port of the air intake valve is connected with a first port of the first circulating valve, a second port of the first circulating valve is connected with a fuel inlet port of the compressor, and a third port of the circulating valve is connected with a fuel discharge port of the fuel pressurization system; the sample input parameter comprises a fuel pressure signal of the second port of the first circulation valve and the sample output parameter comprises a first fuel mass flow of the first port of the first circulation valve, wherein:
establishing a corresponding relation between the sample input parameters and the sample output parameters according to the sample input parameters and the sample output parameters, wherein the corresponding relation comprises the following steps:
establishing a third correspondence between the fuel pressure signal and the first fuel mass flow, the third correspondence being a third model of the at least one model.
In the above scheme, according to the fuel pressure signal and the first fuel mass flow, the third corresponding relation between the fuel pressure signal and the first fuel mass flow is obtained, and the real working process of the first circulating valve is simulated, so that the first output value verified according to the model better conforms to the real value of the first circulating valve in the working process, and the accuracy of controlling the working parameters of the fuel pressurization system is further improved.
In one possible design, the fuel pressurization system includes a solenoid valve, a first port of the solenoid valve is connected with a first port of the first circulation valve, a second port of the solenoid valve is connected with a fuel discharge port of the fuel pressurization system, a third port of the solenoid valve is connected with a fuel outlet port of the compressor, the sample input parameter includes an input electrical signal of the solenoid valve, and the sample output parameter includes a second fuel mass flow rate of the second port of the solenoid valve, wherein:
establishing a corresponding relation between the sample input parameters and the sample output parameters according to the sample input parameters and the sample output parameters, wherein the corresponding relation comprises the following steps:
establishing a fourth correspondence between the input electrical signal and the second fuel mass flow, the fourth correspondence being a fourth model of the at least one model.
In the scheme, according to the input electric signal and the second fuel mass flow, the fourth corresponding relation between the input electric signal and the second fuel mass flow is obtained, the real working process of the electromagnetic valve is simulated, the first output value verified according to the model is enabled to be more consistent with the real value in the working process of the electromagnetic valve, and the accuracy of controlling the working parameters of the fuel pressurization system is further improved.
In a second aspect, there is provided an apparatus for controlling a fuel pressurization system including a compressor for effecting heat exchange between a coolant and a fuel and for pressurizing the fuel, the apparatus comprising an acquisition module and a processing module, wherein:
the acquisition module acquires set first input parameters including a fuel inlet temperature and a fuel inlet pressure in the compressor of the fuel pressurization system;
the processing module is used for inputting the first input parameter into at least one preset model and obtaining a first output parameter corresponding to the first input parameter in the fuel pressurization system; wherein the first output parameter comprises a fuel outlet temperature and/or a fuel outlet pressure, the at least one model is for representing a correspondence between sample input parameters in sample data of the fuel pressurization system, the sample input parameters comprising a fuel inlet temperature and a fuel inlet pressure in the compressor, and sample output parameters in the sample data, the sample output parameters comprising a fuel outlet temperature and a fuel outlet pressure in the compressor; and the number of the first and second groups,
and if the first output parameter is determined to be matched with the preset output parameter, controlling the operation of the fuel pressurizing system according to the first input parameter.
In a possible design, the obtaining module is further configured to obtain the sample input parameter and the sample output parameter in the sample data;
the processing module is further configured to establish a correspondence between the sample input parameter and the sample output parameter based on the sample input parameter and the sample output parameter, the correspondence being the at least one model of the fuel pressurization system.
In one possible design, the processing module is specifically configured to:
determining a polytropic exponent of the compressor according to a fuel inlet temperature, a fuel outlet temperature, a fuel inlet pressure and a fuel outlet pressure in the compressor, wherein the polytropic exponent refers to a parameter of the compressor in a polytropic process of pressurizing the fuel;
establishing a first correspondence between the polytropic exponent and the sample data, the first correspondence being a first model of the at least one model.
In one possible design, the sample data further includes a coolant inlet temperature in the compressor and a wall temperature in the compressor, and the processing module is specifically configured to:
obtaining an equivalent contact area according to the fuel inlet temperature, the wall surface temperature and the coolant outlet temperature, wherein the equivalent contact area is the contact area of the coolant and the fuel in the heat exchange process in the compressor;
establishing a second correspondence between the equivalent contact area and the fuel inlet temperature; wherein the second correspondence is a second model of the at least one model.
In one possible design, the fuel pressurization system comprises an air intake valve and a first circulating valve, a first port of the air intake valve is connected with a fuel supply port of the fuel pressurization system, a second port of the air intake valve is connected with a fuel inlet port of the compressor, a third port of the air intake valve is connected with a first port of the first circulating valve, a second port of the first circulating valve is connected with a fuel inlet port of the compressor, and a third port of the circulating valve is connected with a fuel discharge port of the fuel pressurization system; the sample input parameter comprises a fuel pressure signal of the second port of the first circulation valve, the sample output parameter comprises a first fuel mass flow of the first port of the first circulation valve, and the processing module is specifically configured to:
establishing a corresponding relationship between the sample input parameters and the sample output parameters according to the sample input parameters and the sample output parameters, including:
establishing a third correspondence between the fuel pressure signal and the first fuel mass flow, the third correspondence being a third model of the at least one model.
In one possible design, the fuel pressurization system includes a solenoid valve, a first port of the solenoid valve is connected to a first port of the first circulation valve, a second port of the solenoid valve is connected to a fuel discharge port of the fuel pressurization system, a third port of the solenoid valve is connected to a fuel discharge port of the compressor, the sample input parameter includes an input electrical signal of the solenoid valve, the sample output parameter includes a second fuel mass flow rate of the second port of the solenoid valve, and the processing module is specifically configured to:
establishing a corresponding relationship between the sample input parameters and the sample output parameters according to the sample input parameters and the sample output parameters, including:
establishing a fourth correspondence between the input electrical signal and the second fuel mass flow, the fourth correspondence being a fourth model of the at least one model.
In a third aspect, there is provided an apparatus for controlling a fuel pressurizing system, comprising:
at least one processor, and
a memory communicatively coupled to the at least one processor;
wherein the memory stores instructions executable by the at least one processor, the at least one processor implementing the method of any one of the first aspects by executing the instructions stored by the memory.
In a fourth aspect, there is provided a computer readable storage medium having stored thereon computer instructions which, when run on a computer, cause the computer to perform the method of any of the first aspects.
Drawings
FIG. 1 is a block diagram of a fuel pressurization system provided by an embodiment of the present application;
FIG. 2 is a flow chart of a method of controlling a fuel pressurization system provided by an embodiment of the present application;
FIG. 3 is a diagram of a physical model of a main motor according to an embodiment of the present application;
FIG. 4 is a diagram of a model of a formula in a compression process of a compressor according to an embodiment of the present disclosure;
FIG. 5 is a physical model diagram of a compressor in a compression process according to an embodiment of the present disclosure;
FIG. 6 is a graphical comparison of fuel outlet temperature and fuel inlet temperature provided by an embodiment of the present application;
FIG. 7 is a graphical comparison of fuel outlet pressure and fuel inlet pressure provided by an embodiment of the present application;
FIG. 8 is a physical model diagram of a heat exchange process of a compressor according to an embodiment of the present disclosure;
FIG. 9 is a schematic heat exchange diagram of a compressor according to an embodiment of the present application;
FIG. 10 is a diagram of a physical model of an inlet valve provided in an embodiment of the present application;
FIG. 11 is a physical model diagram of a first circulation valve provided in an embodiment of the present application;
FIG. 12 is a physical model diagram of a first solenoid valve provided in an embodiment of the present application;
FIG. 13 is a graph comparing a desired outlet pressure of fuel to an actual outlet pressure of fuel provided by an embodiment of the present application;
FIG. 14 is a graph illustrating a change in mass flow of fuel at an outlet of a fuel pressurization system provided in an embodiment of the present application;
FIG. 15 is a block diagram of an apparatus for controlling a fuel pressurization system according to an exemplary embodiment of the present disclosure;
fig. 16 is a block diagram of an apparatus for controlling a fuel pressurization system according to an embodiment of the present application.
Detailed Description
In order to better understand the technical solutions provided by the embodiments of the present application, the following detailed description is made with reference to the drawings and specific embodiments.
In order to improve the accuracy of controlling the operating parameters of the fuel pressurization system, the embodiments of the present application provide a method of controlling the fuel pressurization system, and the structure of the fuel control pressurization system to which the method is applied will be exemplified below.
Referring to fig. 1, the fuel pressurization system includes a main motor 103, a compressor 104, an intake valve 102, a first circulation valve 110, a second circulation valve 107, a first solenoid valve 108, a second solenoid valve 109, a first buffer tank 101, a second buffer tank 112, an oil drum 106, a coolant cooler 105, and a fuel cooler 111.
The connection relationship and the function between the respective components in the fuel pressurizing system will be explained below.
The first buffer tank 101 is connected to a fuel supply port in the fuel pressurization system, the first buffer tank 101 is connected to a first port of an intake valve 102 through a pipeline, a second port of the intake valve 102 is connected to a compressor 104, and a third port of the intake valve 102 is connected to a first port of a first circulation valve 110. A second port of the first recirculation valve 110 is connected to a fuel inlet of the compressor 104 and a third port of the first recirculation valve 110 is connected to a fuel inlet of the second surge tank 112. The main motor 103 is connected to the compressor 104, and the main motor 103 is used for driving the compressor 104 to perform a compression operation. The compressor 104 is connected to a coolant cooler 105 through a pipe. The coolant cooler 105 is connected to the oil drum 106 by a pipe. The oil drum 106 is connected to a fuel cooler 111 through a pipe, and the fuel cooler 111 is connected to a second buffer tank 112 through a pipe.
The first port of the first solenoid valve 108 is connected to a first port of a first recirculation valve 110, the second port of the first solenoid valve 108 is connected to a fuel inlet of a second buffer tank 112, and the third port of the first solenoid valve 108 is connected to a first port of a second solenoid valve 109. The second port of the second solenoid valve 109 is connected to the first port of the first solenoid valve 108, the third port of the second solenoid valve 109 is connected to the first port of the second circulation valve 107, the second port of the second circulation valve 107 is connected to the fuel outlet of the first buffer tank 101, and the third port of the second circulation valve 107 is connected to the fuel outlet of the second buffer tank 112.
The flow of fuel and coolant in the fuel pressurization system will be described below. Combustible gases such as natural gas are typically used as fuels. The coolant is generally a liquid, such as oil.
Fuel enters first cache tank 101 and fuel enters compressor 104 from first cache tank 101 through a first port of air inlet valve 102 and through a second port of air inlet valve 102, compressor 104 compressing the fuel. In order to avoid the fuel from having too high a temperature during the compression of the fuel, a coolant is generally required to be introduced into the compressor 104, and the coolant can lubricate and cool the compressor 104. The coolant is generally oil. The coolant is separated from the oil drum 106 and passed through a coolant cooler 105 to the compressor 104. The coolant and fuel undergo a heat exchange process between the compressor 104. The compressed fuel enters the oil drum 106, then passes through the fuel cooler 111, and then passes through the second buffer tank 112, and the fuel pressurization system outputs the pressurized fuel, and finally supplies the pressurized fuel to the gas turbine.
Part of the fuel in the oil drum 106 flows into the intake valve 102 through the second circulation valve 107 to be circulated. A portion of the fuel in the second buffer tank 112 flows into the first buffer tank 101 through the first circulation valve 110 to circulate. A part of the fuel in the second buffer tank 112 flows into the intake valve 102 to circulate through the first circulation valve 110, the first solenoid valve 108, and the second solenoid valve 109 in sequence.
A method of controlling the fuel pressurizing system in the embodiment of the present application will be described below by taking the fuel pressurizing system of fig. 1 as an example. The method is performed by a device controlling a fuel pressurization system. The means for controlling the fuel pressurizing system may be realized by a controller, which may be realized by a Central Processing Unit (CPU) or an Application Specific Integrated Circuit (ASIC). Referring to fig. 2, the process of the method is as follows:
and 204, if the first output parameter is determined to be matched with the preset output parameter, controlling the fuel pressurizing system to operate according to the first input parameter.
It should be noted that step 203 is an optional step.
The general idea in the embodiments of the present application is briefly described as follows:
the device for controlling the fuel pressurization system needs to obtain input parameters of each component in the fuel pressurization system to realize the control of the fuel pressurization system, and the fuel pressurization system is controlled according to the input parameters of each component. The device for controlling the fuel pressurization system verifies the input parameter according to at least one model, and if the output parameter corresponding to the input parameter matches the preset output parameter, the input parameter is reasonable. The means for controlling the fuel pressurizing system controls the operation of the fuel pressurizing system in accordance with the input parameter. The input parameters are verified in advance, so that the input parameters are ensured to meet the conditions, and the accurate control of the fuel pressurization system is realized.
A detailed process of the respective steps performed by the apparatus for controlling the fuel pressurizing system will be described below with reference to fig. 2.
The arrangement for controlling the fuel pressurizing system first executes step 201, i.e. obtains the set first input parameter.
In particular, the first input parameter may be understood as an input parameter of various components in the fuel pressurization system that needs to be verified. The first input parameter may be a user input. The first input parameters include a fuel inlet temperature in the compressor 104 and a fuel inlet pressure in the compressor 104. In addition, the first input parameter further includes one or more of a rotational speed of the main motor 103, a coolant inlet temperature in the compressor 104, a wall surface temperature in the compressor 104, a fuel pressure signal of the second port of the first circulation valve 110, a first input electric signal of the first electromagnetic valve 108, and a second input electric signal of the second electromagnetic valve 109.
After the means for controlling the fuel pressurizing system have executed step 201, step 202 is executed, i.e. at least one model is built on the basis of the sample data.
The means for controlling the fuel pressurizing system need to validate the first input parameter according to at least one model. The at least one model may be understood as a correspondence between a sample input parameter and a sample output parameter in at least one component of the fuel pressurization system. At least one component is referred to as a component in the fuel pressurization system. At least one component includes a compressor 104. In addition, the at least one component includes one or more of a main motor 103, a compressor 104, an air intake valve 102, a first circulation valve 110, a second circulation valve 107, a first solenoid valve 108, and a second solenoid valve 109. However, before the device for controlling the fuel pressurization system verifies the first input parameter, the fuel pressurization system needs to establish at least one model. The manner in which at least one model is built provided by embodiments of the present application is illustrated below.
The mode of establishing at least one model is as follows:
and establishing a corresponding relation between the sample input parameter of each component in the at least one component and the sample output parameter of the at least one component according to the sample input parameter of each component in the at least one component and the sample output parameter of each component in the at least one component in the sample data.
The sample data may be understood as known sample input parameters and corresponding sample output parameters generated during actual operation of the fuel pressurization system. Sample input parameters include a fuel inlet temperature in the compressor 104 and a fuel inlet pressure in the compressor 104. In addition, the sample input parameters further include one or more of a rotational speed of the main motor 103, a coolant inlet temperature in the compressor 104, a wall temperature in the compressor 104, a fuel pressure signal of the first circulation valve 110, a fuel pressure signal of the second circulation valve 107, a first input electrical signal of the first electromagnetic valve 108, and a second input electrical signal of the second electromagnetic valve 109.
The sample output parameters include a fuel inlet pressure in the compressor 104 and a fuel outlet temperature in the compressor 104. Additionally, the sample output parameters may further include one or more of a first fuel mass flow rate of the first circulation valve 110, a second fuel mass flow rate of the second circulation valve 107, and a fuel outlet pressure in the compressor 104, a fuel outlet temperature, a fuel outlet pressure, a polytropic index of the compressor, an equivalent contact area, a third fuel mass flow rate of the first solenoid valve 108, and a fourth fuel mass flow rate of the second solenoid valve 109.
It should be noted that, since the sample output parameters of some components may be used as the sample input parameters of other components, the sample input parameters and the sample output parameters in the sample data are for the corresponding components in the fuel pressurization system.
Specifically, the sample data includes a sample input parameter and a corresponding sample output parameter for each of at least one component of the fuel pressurization system. And obtaining a model corresponding to each part according to the sample input parameters and the corresponding sample output parameters of each part. At least one component is different, and the way of establishing a model corresponding to the component is also different, and the modeling ways of different components are described separately below.
First, when the at least one component includes the main motor 103, the at least one model is built by:
the sample input parameters of the main motor 103 and the sample output parameters of the main motor 103 in the sample data are acquired, and the correspondence between the sample input parameters of the main motor 103 and the sample output parameters of the main motor 103 is established, thereby acquiring a model of the main motor 103.
Specifically, the sample input parameter of the main motor 103 is the rotational speed, and the sample output parameter of the main motor 103 is the fuel inlet pressure in the compressor 104. The correspondence relationship between the rotation speed of the main motor 103 and the fuel inlet pressure in the compressor 104 is a model of the main motor 103. The form of the corresponding relationship may be a functional expression, a graph, a data table, and the like, and is not particularly limited herein. For example, referring to fig. 3, a in fig. 3 represents a physical model of the main motor 103.
When the at least one component includes the compressor 104, the at least one model is established by:
obtaining sample input parameters of the compressor 104 and sample output parameters of the compressor 104 in the sample data, and establishing a corresponding relation between the sample input parameters of the compressor 104 and the sample output parameters of the compressor 104, thereby obtaining a model of the compressor 104.
Specifically, the fuel may undergo two physical processes in the compressor 104, one of which is the compression of the fuel by the compressor 104, hereinafter referred to as compression process. One physical process is the heat exchange between the fuel and the coolant in the compressor 104, hereinafter referred to as the heat exchange process. For the two physical processes of the compressor 104, modeling is performed separately. The modeling processes for the two physical processes are described separately below.
Second, when the at least one component includes the compressor 104, the at least one model is built according to the compression process of the compressor 104 by:
obtaining sample input parameters of the compressor 104 in sample data, wherein the sample input parameters comprise a fuel inlet temperature in the compressor 104, a fuel inlet pressure in the compressor 104 and sample output parameters of the compressor 104, the sample output parameters comprise a fuel outlet temperature and a fuel outlet pressure of the compressor 104, and establishing a first corresponding relation between the sample input parameters of the compressor 104 and the sample output parameters of the compressor 104, so as to obtain a first model in at least one model.
Specifically, the compression process of the compressor 104 is equivalent to a polytropic process, and polytropic exponents in the polytropic process are obtained according to a thermodynamic formula in the compression process, so as to establish a corresponding relationship between the polytropic exponents and the sample input parameters, where the corresponding relationship is a model of the compression process of the compressor 104.
The gas state equation in the compression process of the compressor 104 satisfies the following equation:
wherein n represents a polytropic exponent, TdIs the fuel outlet temperature, T, of the compressor 104sIs the fuel inlet temperature, P, of the compressor 104sIs the fuel inlet pressure, P, of the compressor 104dIs the fuel outlet pressure of the compressor 104.
The above formula is modified to obtain the following formula of the polytropic exponent n:
the sample input parameters and the sample output parameters of the compressor 104 in the sample data are input into the above equation, so that the polytropic exponents corresponding to different sample data can be obtained, and the corresponding relationship between different polytropic exponents and the sample data is established, that is, the model in the compression process of the compressor 104.
For example, referring to fig. 4, a model diagram of a formula in the compression process of the compressor 104 is obtained according to the above formula, and fig. 4 shows a manner of obtaining the model in the compression process of the compressor. A in fig. 4 denotes the main motor 103.
According to the formula model diagram in fig. 4, a simulated physical model diagram of the compressor 104 in fig. 5 can be obtained. B in fig. 5 represents a physical model of the compression process of the compressor 104.
After obtaining the model of the compressor 104 during compression, the model of the compressor 104 is verified. For example, referring to fig. 6, in the case where the fuel inlet temperature of the compressor 104 is set (as shown by a in fig. 6), a curve of the fuel outlet temperature of the compressor 104 obtained according to a model in the compression process of the compressor 104 is shown by a graph b in fig. 6. It can be seen that the fuel outlet temperature of the compressor 104 is stable for a short period of time and is similar to the operation of a real fuel pressurization system.
Referring to fig. 7, in the case of setting the fuel inlet pressure of the compressor 104 (as shown in a of fig. 7), a curve of the fuel outlet pressure of the compressor 104 obtained according to a model during the compression process of the compressor 104 is shown in b of fig. 7. It can be seen that the fuel outlet pressure of the compressor 104 is stable for a short period of time and is similar to the operation of a real fuel pressurization system.
Thirdly, when the at least one component includes the compressor 104, at least one model is established according to a heat exchange process of the compressor 104 by:
sample data is obtained, with sample input parameters including coolant inlet temperature of the compressor 104, fuel inlet temperature, and wall temperature in the compressor 104. And obtaining the equivalent contact area according to the sample data, and establishing a second corresponding relation between the sample input parameters of the compressor 104 and the equivalent contact area of the compressor 104, so as to obtain a second model in the at least one model.
Referring to fig. 8, the compressor 104 is equivalent to a heat exchanger, and fuel is injected into port 1 of the compressor 104 and coolant is injected into port 2 of the compressor 104 in fig. 8. The fuel and the coolant exchange heat in the compressor 104. Fig. 9 is a schematic diagram of the heat exchange process of fig. 8. Referring to fig. 9, the entire gas-liquid heat exchanger may be divided into three parts, i.e., a gas part indicated by a letter G, a wall surface of the compressor 104 indicated by a letter W, and a liquid part indicated by a letter L.
The heat exchange between the gas and the wall surface comprises both radiation and convection. However, since the radiation exchange has little influence on the compressor 104, the heat exchange process of the compressor 104 is mainly considered in modeling in the embodiment of the present application.
Specifically, according to the principle of conservation of energy, the heat lost in the fuel compressor 104 is the same as the heat gained by the coolant in the compressor 104.
The heat lost by the fuel in the compressor 104 is expressed as:
dh＝h1.s.(Ts-Tw)
where h1 represents the convective heat exchange coefficient between the fuel and the wall, s represents the equivalent contact area between the fuel and the compressor 104, and TwIndicating the wall temperature.
The heat gained by the coolant in the compressor 104 is expressed as:
dh＝h2.s.(Tw-Ti)
where h2 denotes the convective heat exchange coefficient between the coolant and the wall surface, TiIndicating the coolant inlet temperature.
The sample data is input into the above two formulas, so that the equivalent contact area can be calculated, and the second corresponding relation between the equivalent contact area and the fuel inlet temperature is obtained, thereby obtaining a model of the heat exchange process of the compressor 104.
Fourth, when at least one component includes an intake valve 102, at least one model is created by:
a physical model of the intake valve 102 is established based on the structural requirements of the fuel pressurization system. Referring to fig. 10, d in fig. 10 is a physical model diagram of the intake valve 102. The connection between the intake valve 102 and other components can be found in the discussion above and will not be described in detail here.
Fifth, when the at least one component includes the first circulation valve 110, the at least one model is created by:
obtaining a sample input parameter in the sample data, the sample input parameter comprising a fuel pressure signal of the first circulation valve 110, and a sample output parameter comprising a first fuel mass flow of the first circulation valve 110, establishing a third correspondence between the fuel pressure signal and the first fuel mass flow of the first circulation valve 110, thereby obtaining a model of the first circulation valve 110. For example, referring to fig. 11, f in fig. 11 is a physical model diagram of the first circulation valve 110.
According to the sample data, the first fuel mass flow of the first circulation valve 110 corresponding to the first circulation valve 110 under different fuel pressure signals is obtained, that is, according to the fuel pressure signal and the first fuel mass flow, the third corresponding relationship between the fuel pressure signal and the first fuel mass flow is obtained, so as to obtain the model of the first circulation valve 110. The connection relationship between the first circulation valve 110 and other components may be omitted herein with reference to the foregoing discussion.
Sixth, when at least one component includes second circulation valve 107, at least one model is created by:
a sample input parameter comprising a fuel pressure signal of first circulation valve 110 and a sample output parameter comprising a second fuel mass flow of second circulation valve 107 are obtained from the sample data, a third correspondence between the second fuel pressure signal and the second fuel mass flow of second circulation valve 107 is established, thereby obtaining a model of second circulation valve 107. The physical model of the second circulation valve 107 is similar to the physical model of the first circulation valve 110.
Seventh, when the at least one component includes the first solenoid valve 108, the at least one model is created by:
acquiring a sample input parameter in the sample data, wherein the sample input parameter comprises a first input electric signal of the first electromagnetic valve 108 and a sample output parameter, the sample output parameter comprises a third fuel mass flow of the first electromagnetic valve 108, and establishing a fourth corresponding relation between the fuel pressure signal and the third fuel mass flow of the first electromagnetic valve 108, so as to obtain a model of the first electromagnetic valve 108. For example, referring to fig. 12, e in fig. 12 represents the first solenoid valve 108.
Eighth, when the at least one component includes the second solenoid valve 109, the at least one model is established by:
acquiring a sample input parameter in the sample data, wherein the sample input parameter comprises a second input electric signal of the second electromagnetic valve 109 and a sample output parameter, the sample output parameter comprises a fourth fuel mass flow of the second electromagnetic valve 109, and establishing a fifth corresponding relation between the fuel pressure signal and the fourth fuel mass flow of the second electromagnetic valve 109, so as to obtain a model of the second electromagnetic valve 109.
It should be noted that the at least one model may comprise one or more of the five models obtained by the eight methods discussed above. In the following, taking as an example that at least one model includes five models obtained by eight methods, the at least one model is compared with the operation process of the real fuel pressurizing system.
For example, referring to FIG. 13, the desired discharge pressure of the fuel at the discharge end of the second surge tank 112 in the fuel pressurization system is shown in graph a of FIG. 13 and in graph b of the discharge pressure of the fuel of the second surge tank 112 with the fuel inlet pressure of the compressor 104 set when at least one of the models includes the models of all of the components discussed above. From fig. 13, it can be seen that the output of the model coincides with the operation condition of the actual fuel pressurizing system.
Referring to fig. 14, fig. 14 shows the mass flow of fuel output from the fuel pressurization system. It can be seen from fig. 14 that the at least one model can quickly achieve a stable mass flow output of the gas pressurization system.
It should be noted that step 202 may be executed before step 201, and step 201 is executed first in fig. 2 as an example, but the execution order of step 202 is not limited in practice.
After the step 202 is executed, the apparatus for controlling the fuel pressurizing system executes a step 203 of inputting the first input parameter to at least one preset model, and obtaining a first output parameter corresponding to the first input parameter in the fuel pressurizing system.
The first output parameter includes, among other things, the fuel inlet pressure in the compressor 104, the fuel outlet temperature in the compressor 104, and the fuel outlet pressure in the compressor 104. The sample output parameters include one or more of a fuel outlet temperature, a fuel outlet pressure, a compressor polytropic index, an equivalent contact area, a first fuel mass flow of the first solenoid valve 108, a second fuel mass flow of the second solenoid valve 109.
Specifically, eight models are mentioned in the foregoing, and by inputting different first input parameters into the corresponding models, the output parameters corresponding to the input parameters can be obtained according to the corresponding models.
For example, if the first input parameter is the fuel inlet temperature of the compressor 104 and the fuel inlet pressure of the compressor 104, the first input parameter can be input into the model of the compressor 104 obtained in the first manner, so as to calculate the fuel outlet pressure of the compressor 104 and the fuel outlet temperature of the compressor 104 according to the model of the compressor 104.
After step 203 is executed, the apparatus for controlling the fuel pressurizing system executes step 204, and if it is determined that the first output parameter matches the preset output parameter, the operation of the fuel pressurizing system is controlled according to the first input parameter.
In particular, the preset output parameters may be set by a user. If the first output parameter matches the preset output parameter, the first input parameter is verified as being reasonable. The means for controlling the fuel pressurizing system may thus take the first input parameter as an actual input parameter of the fuel pressurizing system, thereby controlling the operation of the fuel pressurizing system in dependence on the first input parameter.
It should be noted that fig. 6, 7, 13, and 14 are examples in which the fuel is natural gas, but the specific type of fuel is not limited in practice.
Based on the foregoing discussion of a method of controlling a fuel pressurization system, embodiments of the present application provide an apparatus for controlling a fuel pressurization system including a compressor for effecting heat exchange between a coolant and a fuel and for pressurizing the fuel, the apparatus including an acquisition module 1501 and a processing module 1502, wherein:
an acquisition module 1501 acquiring set first input parameters including a fuel inlet temperature and a fuel inlet pressure in a compressor of a fuel pressurization system;
a processing module 1502 for inputting a first input parameter to a preset at least one model, obtaining a first output parameter in the fuel pressurization system corresponding to the first input parameter; wherein the first output parameter comprises a fuel outlet temperature and/or a fuel outlet pressure, the at least one model is used for representing a corresponding relation between a sample input parameter in sample data of the fuel pressurization system and a sample output parameter in the sample data, the sample input parameter comprises a fuel inlet temperature and a fuel inlet pressure in the compressor, and the sample output parameter comprises a fuel outlet temperature and a fuel outlet pressure in the compressor; and the number of the first and second groups,
if it is determined that the first output parameter matches the preset output parameter, operation of the fuel pressurization system is controlled based on the first input parameter.
In a possible design, the obtaining module 1501 is further configured to obtain a sample input parameter and a sample output parameter in sample data;
the processing module 1502 is further configured to establish a correspondence between the sample input parameter and the sample output parameter, the correspondence being at least one model of the fuel pressurization system.
In one possible design, a polytropic exponent of the compressor is determined according to the fuel inlet temperature, the fuel outlet temperature, the fuel inlet pressure and the fuel outlet pressure in the compressor, wherein the polytropic exponent refers to a parameter of the compressor in a polytropic process of pressurizing fuel;
and establishing a first corresponding relation between the polytropic exponent and the sample data, wherein the first corresponding relation is a first model in the at least one model.
In one possible design, the sample data further includes a coolant inlet temperature in the compressor and a wall temperature in the compressor, and the processing module 1502 is specifically configured to:
obtaining an equivalent contact area according to the inlet temperature of the fuel, the wall surface temperature and the outlet temperature of the coolant, wherein the equivalent contact area is the contact area of the coolant and the fuel in the heat exchange process in the compressor;
establishing a second corresponding relation between the equivalent contact area and the fuel inlet temperature; wherein the second corresponding relationship is a second model of the at least one model.
In one possible design, the fuel pressurization system comprises an air intake valve and a first circulating valve, a first port of the air intake valve is connected with a fuel supply port of the fuel pressurization system, a second port of the air intake valve is connected with a fuel inlet of the compressor, a third port of the air intake valve is connected with a first port of the first circulating valve, a second port of the first circulating valve is connected with a fuel inlet of the compressor, and a third port of the circulating valve is connected with a fuel discharge port of the fuel pressurization system; the sample input parameter comprises a fuel pressure signal of the second port of the first circulation valve, the sample output parameter comprises a first fuel mass flow of the first port of the first circulation valve, and the processing module 1502 is specifically configured to:
a third correspondence between the fuel pressure signal and the first fuel mass flow is established, the third correspondence being a third model of the at least one model.
In one possible design, the fuel pressurization system includes a solenoid valve, a first port of the solenoid valve is connected to a first port of the first circulation valve, a second port of the solenoid valve is connected to a fuel discharge port of the fuel pressurization system, a third port of the solenoid valve is connected to a fuel discharge port of the compressor, the sample input parameter includes an input electrical signal of the solenoid valve, the sample output parameter includes a second fuel mass flow rate of the second port of the solenoid valve, and processing module 1502 is specifically configured to:
establishing a fourth correspondence between the input electrical signal and the second fuel mass flow, the fourth correspondence being a fourth model of the at least one model.
Based on the foregoing discussion of a method of controlling a fuel pressurization system, embodiments of the present application provide an apparatus for controlling a fuel pressurization system, comprising:
at least one processor 1601, and
a memory 1602 communicatively connected to the at least one processor 1601;
wherein the memory 1602 stores instructions executable by the at least one processor 1601, the at least one processor 1601 implementing a method of controlling a fuel pressurization system as described in fig. 2 by executing the instructions stored by the memory 1602.
It should be noted that fig. 16 exemplifies one processor 1601, but the number of processors 1601 is not limited in practice.
The processing module 1502 in fig. 15 may be implemented by the processor 1601 in fig. 16, as an embodiment.
Based on the foregoing discussion of a method of controlling a fuel pressurization system, embodiments of the present application provide a computer readable storage medium having stored thereon computer instructions, which, when executed on a computer, cause the computer to perform a method of controlling a fuel pressurization system as described in fig. 2.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A method of controlling a fuel pressurization system, the fuel pressurization system including a compressor for effecting heat exchange between a coolant and a fuel and for pressurizing the fuel, the method comprising:
obtaining set first input parameters including a fuel inlet temperature and a fuel inlet pressure in the compressor of the fuel pressurization system;
inputting the first input parameter into at least one preset model, and obtaining a first output parameter corresponding to the first input parameter in the fuel pressurization system; wherein the first output parameter comprises a fuel outlet temperature and/or a fuel outlet pressure, the at least one model is for representing a correspondence between sample input parameters in sample data of the fuel pressurization system, the sample input parameters comprising a fuel inlet temperature and a fuel inlet pressure in the compressor, and sample output parameters in the sample data, the sample output parameters comprising a fuel outlet temperature and a fuel outlet pressure in the compressor;
and if the first output parameter is determined to be matched with the preset output parameter, controlling the operation of the fuel pressurizing system according to the first input parameter.
2. The method of claim 1, prior to obtaining a first output parameter in the fuel pressurization system corresponding to the first input parameter, comprising:
acquiring a sample input parameter and a sample output parameter in sample data of the fuel pressurization system;
establishing a correspondence between the sample input parameter and the sample output parameter as a function of the sample input parameter and the sample output parameter, the correspondence being the at least one model of the fuel pressurization system.
3. The method of claim 2, wherein establishing a correspondence between the sample input parameters and the sample output parameters based on the sample input parameters and the sample output parameters comprises:
determining a polytropic exponent of the compressor according to a fuel inlet temperature, a fuel outlet temperature, a fuel inlet pressure and a fuel outlet pressure in the compressor, wherein the polytropic exponent refers to a parameter of the compressor in a polytropic process of pressurizing the fuel;
establishing a first correspondence between the polytropic exponent and the sample data, the first correspondence being a first model of the at least one model.
4. The method of claim 2 or 3, wherein the sample data further comprises a coolant inlet temperature in the compressor and a wall temperature in the compressor, and establishing a correspondence between the sample input parameters and the sample output parameters based on the sample input parameters and the sample output parameters comprises:
obtaining an equivalent contact area according to the fuel inlet temperature, the wall surface temperature and the coolant inlet temperature, wherein the equivalent contact area is the contact area of the coolant and the fuel in the heat exchange process in the compressor;
establishing a second correspondence between the equivalent contact area and the fuel inlet temperature; wherein the second correspondence is a second model of the at least one model.
5. The method of claim 2 or 3, wherein the fuel pressurization system comprises an air intake valve and a first circulation valve, a first port of the air intake valve being connected to a fuel supply port of the fuel pressurization system, a second port of the air intake valve being connected to a fuel intake port of the compressor, a third port of the air intake valve being connected to a first port of the first circulation valve, a second port of the first circulation valve being connected to a fuel intake port of the compressor, a third port of the circulation valve being connected to a fuel discharge port of the fuel pressurization system; the sample input parameter comprises a fuel pressure signal of the second port of the first circulation valve and the sample output parameter comprises a first fuel mass flow of the first port of the first circulation valve, wherein:
establishing a corresponding relationship between the sample input parameters and the sample output parameters according to the sample input parameters and the sample output parameters, including:
establishing a third correspondence between the fuel pressure signal and the first fuel mass flow, the third correspondence being a third model of the at least one model.
6. The method of claim 5, wherein the fuel pressurization system comprises a solenoid valve, a first port of the solenoid valve is connected to a first port of the first circulation valve, a second port of the solenoid valve is connected to a fuel discharge port of the fuel pressurization system, a third port of the solenoid valve is connected to a fuel outlet port of the compressor, the sample input parameter comprises an input electrical signal of the solenoid valve, and the sample output parameter comprises a second fuel mass flow rate of the second port of the solenoid valve, wherein:
establishing a corresponding relationship between the sample input parameters and the sample output parameters according to the sample input parameters and the sample output parameters, including:
establishing a fourth correspondence between the input electrical signal and the second fuel mass flow, the fourth correspondence being a fourth model of the at least one model.
7. An arrangement for controlling a fuel pressurizing system, characterized in that the fuel pressurizing system comprises a compressor for effecting heat exchange between a coolant and a fuel and for pressurizing the fuel, the arrangement comprising an acquisition module and a processing module, wherein:
the acquisition module acquires set first input parameters including a fuel inlet temperature and a fuel inlet pressure in the compressor of the fuel pressurization system;
the processing module is used for inputting the first input parameter into at least one preset model and obtaining a first output parameter corresponding to the first input parameter in the fuel pressurization system; wherein the first output parameter comprises a fuel outlet temperature and/or a fuel outlet pressure, the at least one model is for representing a correspondence between sample input parameters in sample data of the fuel pressurization system, the sample input parameters comprising a fuel inlet temperature and a fuel inlet pressure in the compressor, and sample output parameters in the sample data, the sample output parameters comprising a fuel outlet temperature and a fuel outlet pressure in the compressor; and the number of the first and second groups,
and if the first output parameter is determined to be matched with the preset output parameter, controlling the operation of the fuel pressurizing system according to the first input parameter.
8. The apparatus of claim 7,
the obtaining module is further configured to obtain a sample input parameter and a sample output parameter in the sample data;
the processing module is further configured to establish a correspondence between the sample input parameter and the sample output parameter based on the sample input parameter and the sample output parameter, the correspondence being the at least one model of the fuel pressurization system.
9. An apparatus for controlling a fuel pressurization system, comprising:
at least one processor, and
a memory communicatively coupled to the at least one processor;
wherein the memory stores instructions executable by the at least one processor, the at least one processor implementing the method of any one of claims 1-6 by executing the instructions stored by the memory.
10. A computer-readable storage medium having stored thereon computer instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1-6.
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