Hydrocarbon fuel flue gas thermophysical parameter calculation method and device, computer equipment and storage medium

Abstract

The invention discloses a method and a device for calculating thermophysical parameters of hydrocarbon fuel flue gas, computer equipment and a storage medium. The hydrocarbon fuel flue gas thermophysical parameter calculation method comprises the following steps: acquiring chemical composition information of hydrocarbon fuel and thermophysical parameter information of water and carbon dioxide; according to the chemical composition information of the hydrocarbon fuel, determining the molar ratio of carbon dioxide to water in the hydrocarbon fuel complete combustion product; and determining the thermophysical parameters of the hydrocarbon fuel smoke according to the thermophysical parameter information of the water and the carbon dioxide and the molar ratio of the carbon dioxide to the water in the hydrocarbon fuel complete combustion product. According to the calculation method provided by the invention, the thermophysical parameters of the hydrocarbon fuel flue gas at high temperature and high pressure can be quickly and accurately calculated.

Description

Technical Field

[0001] The present application relates to the field of fuel combustion technology, and in particular to a method, device, computer equipment, and storage medium for calculating thermophysical property parameters of hydrocarbon fuel flue gas. Background Art

[0002] When hydrocarbon fuels are mixed with oxygen and burned, they produce a high-temperature and high-pressure gaseous mixture, called flue gas. After being ejected at high speed, the flue gas can provide power for flight. Moreover, it can be fully burned in a very short time, releasing a large amount of energy to ensure flight performance. It plays a key role in the aerospace field and the power energy field.

[0003] In the engine design of aerospace, automobile and other fields, the thermophysical parameters of hydrocarbon fuel flue gas are crucial. For example, the density, viscosity and other parameters of the flue gas directly affect the injection, atomization and mixing process of the flue gas, which in turn affects the combustion efficiency and engine performance. Accurate thermophysical parameters can assist in optimizing the engine's fuel system, combustion chamber structure, etc., and improve the engine's power output, fuel economy and reliability. At the same time, hydrocarbon fuels will generate a lot of heat during the combustion process, and an effective thermal management system is required to ensure the normal operation of equipment such as engines. The thermal physical parameters of flue gas, such as thermal conductivity and specific heat capacity, are the key basis for designing a thermal management system, which is conducive to determining the flow rate of the coolant, the size of the radiator and the heat dissipation method, etc., to ensure that the system can dissipate heat in a timely and effective manner, prevent equipment overheating, and extend the service life of the equipment.

[0004] In summary, the thermophysical properties of hydrocarbon fuel flue gas are crucial to the thermal design and thermal protection of the engine. However, it is difficult to measure the thermophysical properties of hydrocarbon fuel flue gas by experimental means under high temperature and high pressure environment. Summary of the invention

[0005] Based on this, the present application provides a method, device, computer equipment, and storage medium for calculating the thermophysical properties of hydrocarbon fuel flue gas. The calculation method provided by the present application can quickly and accurately calculate the thermophysical properties of hydrocarbon fuel flue gas under high temperature and high pressure.

[0006] The first aspect of the present application provides a method for calculating the thermophysical property parameters of hydrocarbon fuel flue gas, comprising the following steps:

[0007] Obtain chemical composition information of hydrocarbon fuels, and thermophysical parameter information of water and carbon dioxide;

[0008] Determining the molar ratio of carbon dioxide and water in the complete combustion product of the hydrocarbon fuel according to the chemical composition information of the hydrocarbon fuel;

[0009] The thermophysical property parameters of the hydrocarbon fuel flue gas are determined according to the thermophysical property parameter information of water and carbon dioxide and the molar ratio of carbon dioxide and water in the complete combustion product of the hydrocarbon fuel.

[0010] In some embodiments of the present application, determining the molar ratio of carbon dioxide and water in the complete combustion product of the hydrocarbon fuel according to the chemical composition information of the hydrocarbon fuel includes:

[0011] According to the chemical composition information of the hydrocarbon fuel, a reaction equation for complete combustion of the hydrocarbon fuel is determined, and the reaction equation is represented by Formula 1:

[0012]

[0013] In formula 1, C X H Y represents the chemical composition of hydrocarbon fuel, where X≥1, Y≥1;

[0014] According to Formula 1, it is determined that the complete combustion products of the hydrocarbon fuel include Y / 2 mol of water and X mol of carbon dioxide;

[0015] The molar proportions of water and carbon dioxide in the complete combustion products of the hydrocarbon fuel are determined according to Formula 2 and Formula 3, respectively:

[0016]

[0017] In formula 2, Represents the molar proportion of water in the complete combustion products of hydrocarbon fuels;

[0018] In formula 3, Represents the molar percentage of carbon dioxide in the products of complete combustion of hydrocarbon fuels.

[0019] In some embodiments of the present application, the determining of the thermophysical parameters of the hydrocarbon fuel flue gas according to the thermophysical parameter information of the water and carbon dioxide and the molar ratio of carbon dioxide and water in the complete combustion product of the hydrocarbon fuel includes:

[0020] The thermophysical property parameters of the hydrocarbon fuel flue gas are determined according to Formula 4:

[0021]

[0022] In formula 4, F represents the thermophysical parameters of hydrocarbon fuel flue gas, Represents the molar proportion of water in the complete combustion products of hydrocarbon fuels, represents the thermophysical parameters of water, Represents the molar proportion of carbon dioxide in the complete combustion products of hydrocarbon fuels, represents the thermophysical parameters of carbon dioxide, and F, The types of thermophysical parameters represented by the three are the same.

[0023] In some embodiments of the present application, the thermophysical property parameters of the hydrocarbon fuel flue gas include one or more of density, specific heat capacity at constant pressure, and enthalpy.

[0024] In some embodiments of the present application, the determining of the thermophysical parameters of the hydrocarbon fuel flue gas according to the thermophysical parameter information of the water and carbon dioxide and the molar ratio of carbon dioxide and water in the complete combustion product of the hydrocarbon fuel includes:

[0025] The thermophysical parameters of the hydrocarbon fuel flue gas are determined according to Formula 5:

[0026]

[0027] In formula 5, F represents the thermophysical parameters of hydrocarbon fuel flue gas, Represents the molar proportion of water in the complete combustion products of hydrocarbon fuels, represents the thermophysical parameters of water, Represents the molar proportion of carbon dioxide in the complete combustion products of hydrocarbon fuels, represents the thermophysical parameters of carbon dioxide, and F, The three represent the same type of thermophysical parameters. and are mixing coefficients, which are calculated by equation 6 and equation 7 respectively:

[0028]

[0029] In Formula 6 and Formula 7, and Same as defined in Formula 5.

[0030] In some embodiments of the present application, the thermophysical property parameters of the hydrocarbon fuel include viscosity and / or thermal conductivity.

[0031] In some embodiments of the present application, the temperature of the hydrocarbon fuel flue gas is ≤2000K.

[0032] The second aspect of the present application provides a device for calculating the thermophysical property parameters of hydrocarbon fuel flue gas, comprising:

[0033] An acquisition module is used to obtain chemical composition information of hydrocarbon fuels and thermophysical parameter information of water and carbon dioxide;

[0034] A processing module, used to determine the molar ratio of carbon dioxide and water in the complete combustion product of the hydrocarbon fuel according to the chemical composition information of the hydrocarbon fuel;

[0035] A determination module, configured to determine the thermal property parameters of the hydrocarbon fuel flue gas according to the thermal property parameter information of the water and carbon dioxide and the molar proportions of carbon dioxide and water in the complete combustion products of the hydrocarbon fuel.

[0036] A third aspect of the present application provides a computer device, including: a processor, and a memory communicatively connected to the processor;

[0037] The memory stores computer-executable instructions;

[0038] The processor executes the computer-executable instructions stored in the memory to implement the method for calculating the thermal property parameters of the hydrocarbon fuel flue gas as described in the first aspect of the present application.

[0039] A fourth aspect of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed, the computer is enabled to execute the method for calculating the thermal property parameters of the hydrocarbon fuel flue gas as described in the first aspect of the present application.

[0040] The method for calculating the thermal property parameters of the hydrocarbon fuel flue gas provided by the present application can quickly calculate the thermal property parameters of the hydrocarbon fuel parameters through the chemical composition information of the hydrocarbon fuel and the thermal property parameter information of water and carbon dioxide. Compared with the literature values, the maximum deviation of the thermal property parameters calculated by the calculation method of the present application is not greater than 10%, which fully meets the calculation requirements of a 10% deviation in engineering, has high accuracy, and can provide theoretical support for thermal design and thermal protection in the fields of energy development and utilization, aerospace, petrochemical, etc. Description of the Drawings

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0042] Figure 1 It is a schematic flowchart of the method for calculating the thermal property parameters of the hydrocarbon fuel flue gas provided by an embodiment of the present application;

[0043] Figure 2 It is a schematic diagram of the device for calculating the thermal property parameters of the hydrocarbon fuel flue gas provided by an embodiment of the present application;

[0044] Figure 3 It is a schematic diagram of the computer device provided by an embodiment of the present application;

[0045] Figure 4Curve comparison diagram of the calculated value and literature value of the viscosity of coal oil flue gas varying with temperature in Embodiment 1 of this application;

[0046] Figure 5 Curve comparison diagram of the density of methane flue gas varying with temperature under pressures of 0.1 MPa, 1 MPa, 10 MPa, and 30 MPa respectively in Embodiment 2 of this application;

[0047] Figure 6 Curve comparison diagram of the isobaric specific heat capacity of methane flue gas varying with temperature under pressures of 0.1 MPa, 1 MPa, 10 MPa, and 30 MPa respectively in Embodiment 2 of this application;

[0048] Figure 7 Curve comparison diagram of the enthalpy of methane flue gas varying with temperature under pressures of 0.1 MPa, 1 MPa, 10 MPa, and 30 MPa respectively in Embodiment 2 of this application;

[0049] Figure 8 Curve comparison diagram of the viscosity of methane flue gas varying with temperature under pressures of 0.1 MPa, 1 MPa, 10 MPa, and 30 MPa respectively in Embodiment 2 of this application;

[0050] Fig. 9 Curve comparison diagram of the thermal conductivity of methane flue gas varying with temperature under pressures of 0.1 MPa, 1 MPa, 10 MPa, and 30 MPa respectively in Embodiment 2 of this application.

[0051] Explanation of reference numerals:

[0052] 10: Thermal property parameter calculation device for hydrocarbon fuel flue gas; 11: Acquisition module; 12: Processing module; 13: Determination module; 20: Computer device; 21: Processor; 22: Memory. Detailed implementation manners

[0053] In the description of this application, the meaning of several is more than one, and the meaning of multiple is more than two. Understand greater than, less than, exceeding, etc. as not including the present number, and understand above, below, within, etc. as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the description of this invention in this specification are only for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0055] The thermophysical properties of hydrocarbon fuel flue gas are crucial for the thermal design and thermal protection of engines. However, it is difficult to measure the thermophysical properties of hydrocarbon fuel flue gas by experimental means under high-temperature and high-pressure environments. Therefore, it is crucial to provide a method that can quickly and accurately obtain the thermophysical properties of hydrocarbon fuel flue gas through theoretical calculation without experimental means.

[0056] Based on this, in the first aspect of the present application, a method for calculating the thermophysical properties of hydrocarbon fuel flue gas is provided. Figure 1 For the schematic flow chart of the method for calculating the thermophysical properties of hydrocarbon fuel flue gas provided in an embodiment of the present application, please refer to Figure 1 , the method for calculating the thermophysical properties of hydrocarbon fuel flue gas includes the following steps:

[0057] S101: Obtain the chemical composition information of the hydrocarbon fuel and the thermophysical property information of water and carbon dioxide.

[0058] S102: Determine the molar proportions of carbon dioxide and water in the complete combustion products of the hydrocarbon fuel according to the chemical composition information of the hydrocarbon fuel.

[0059] S103: Determine the thermophysical properties of the hydrocarbon fuel flue gas according to the thermophysical property information of water and carbon dioxide and the molar proportions of carbon dioxide and water in the complete combustion products of the hydrocarbon fuel.

[0060] It should be noted that in this embodiment, unless otherwise specified, each reaction step can be carried out in the order described in the text or not in the order described in the text. For example, other steps can be included between each reaction step, and the reaction steps can also be appropriately reordered. This can be determined by those skilled in the art based on common knowledge and experience. Preferably, the reaction method in this embodiment is carried out in sequence.

[0061] In the present application, hydrocarbon fuel flue gas refers to the gaseous mixture produced after the complete combustion of hydrocarbon fuel in oxygen. Complete combustion refers to the process in which the combustible substances in the hydrocarbon fuel can be converted into final stable oxides or other stable products according to the stoichiometric relationship when they are in full contact with oxygen and undergo chemical reactions. Taking the complete combustion of methane as an example, the reaction equation for its complete combustion is CH 4 +2O 2 =2H 2 O+CO 2 . In this reaction, the carbon and hydrogen in methane react completely with oxygen to produce carbon dioxide and water, and there are no carbon monoxide, hydrocarbon intermediate products, or unreacted carbon and hydrogen elements.

[0062] In step S101, for hydrocarbon fuels with a clear source, their chemical composition information can be directly obtained. For example, the chemical composition of methane is CH 4 , kerosene is a mixture of hydrocarbons such as alkanes, cycloalkanes, aromatic hydrocarbons, and alkenes, and its average chemical composition is generally considered to be C 12 H 23 ; for hydrocarbon fuels with an unclear source, their chemical composition information can be obtained through experimental analysis methods such as gas chromatography (GC), gas chromatography - mass spectrometry (GC - MS), elemental analysis, nuclear magnetic resonance (NMR), etc., combined with a professional chemical substance database.

[0063] In step S101, the thermophysical property parameter information of water and carbon dioxide can be obtained by referring to a single - component physical property parameter database.

[0064] In step S102, based on the carbon and hydrogen composition in the hydrocarbon fuel, the molar amounts of carbon dioxide and water generated after its complete combustion can be determined, and then the molar percentages of carbon dioxide and water in the complete combustion products of the hydrocarbon fuel can be obtained.

[0065] In step S103, according to the thermophysical property parameter information of water and carbon dioxide and their molar percentages in the complete combustion products of the hydrocarbon fuel, the thermophysical property parameters of the hydrocarbon fuel flue gas can be calculated.

[0066] The method for calculating the thermophysical property parameters of the hydrocarbon fuel flue gas provided by this application can quickly calculate the thermophysical property parameters of the hydrocarbon fuel parameters through the chemical composition information of the hydrocarbon fuel and the thermophysical property parameter information of water and carbon dioxide. And compared with the literature values, the maximum deviation of the thermophysical property parameters calculated by the calculation method of this application is not greater than 10%, which fully meets the calculation requirements of a 10% deviation in engineering, has high accuracy, and can provide theoretical support for thermal design and thermal protection in fields such as energy development and utilization, aerospace, and petrochemical industry.

[0067] In some embodiments of this application, in S102, determining the molar percentages of carbon dioxide and water in the complete combustion products of the hydrocarbon fuel according to the chemical composition information of the hydrocarbon fuel includes:

[0068] Determining the reaction equation for the complete combustion of the hydrocarbon fuel according to the chemical composition information of the hydrocarbon fuel, and the reaction equation is represented by Equation 1:

[0069]

[0070] In Equation 1, C X H Y represents the chemical composition of the hydrocarbon fuel, where X ≥ 1 and Y ≥ 1;

[0071] According to Equation 1, the complete combustion products of the hydrocarbon fuel include Y / 2 mol of water and X mol of carbon dioxide;

[0072] According to Equation 2 and Equation 3 respectively, determine the molar proportions of water and carbon dioxide in the complete combustion products of the hydrocarbon fuel:

[0073]

[0074] In Equation 2, represents the molar proportion of water in the complete combustion products of the hydrocarbon fuel;

[0075] In Equation 3, represents the molar proportion of carbon dioxide in the complete combustion products of the hydrocarbon fuel.

[0076] It should be noted that C X H Y representing the average chemical composition of the hydrocarbon fuel, when the hydrocarbon fuel is a single hydrocarbon compound, X and Y are integers greater than or equal to 1, and when the hydrocarbon fuel is a mixture of different hydrocarbon compounds, X and Y can be non-integers greater than or equal to 1.

[0077] In some embodiments of the present application, in step S103, according to the thermal property parameter information of water and carbon dioxide and the molar proportions of carbon dioxide and water in the complete combustion products of the hydrocarbon fuel, determine the thermal property parameters of the hydrocarbon fuel flue gas, including:

[0078] Determine the thermal property parameters of the hydrocarbon fuel flue gas according to Equation 4:

[0079]

[0080] In Equation 4, F represents the thermal property parameter of the hydrocarbon fuel flue gas, represents the molar proportion of water in the complete combustion products of the hydrocarbon fuel, represents the thermal property parameter of water, represents the molar proportion of carbon dioxide in the complete combustion products of the hydrocarbon fuel, represents the thermal property parameter of carbon dioxide, and F, all represent thermal property parameters of the same type.

[0081] By summing the products of the molar proportions of carbon dioxide and water in the complete combustion products of the hydrocarbon fuel and their respective thermal property parameters, the thermal property parameters of the hydrocarbon fuel flue gas can be quickly and accurately calculated.

[0082] In the present application, the fact that F, all represent thermal property parameters of the same type means that: when the thermal property parameter F of the hydrocarbon fuel flue gas being calculated is the thermal conductivity, the corresponding They are also the thermal conductivities of water and carbon dioxide respectively, and these three represent the thermal property parameters at the same temperature and pressure.

[0083] In some embodiments of the present application, the calculation formula shown in Equation 4 has better applicability to one or more thermal property parameters among the density, specific heat capacity at constant pressure, and enthalpy of hydrocarbon fuel flue gas, and can enable more accurate calculation results for these thermal property parameters.

[0084] Hereinafter, according to the different types of thermal property parameters, their corresponding calculation methods will be listed respectively.

[0085] The density of hydrocarbon fuel flue gas can be calculated by Equation 8:

[0086]

[0087] In Equation 8, ρ represents the density of hydrocarbon fuel flue gas, represents the molar fraction of water in the complete combustion products of hydrocarbon fuel, represents the density of water, represents the molar fraction of carbon dioxide in the complete combustion products of hydrocarbon fuel, represents the density of carbon dioxide.

[0088] The specific heat capacity at constant pressure of hydrocarbon fuel flue gas can be calculated by Equation 9:

[0089]

[0090] In Equation 9, C P represents the specific heat capacity at constant pressure of hydrocarbon fuel flue gas, represents the molar fraction of water in the complete combustion products of hydrocarbon fuel, represents the specific heat capacity at constant pressure of water, represents the molar fraction of carbon dioxide in the complete combustion products of hydrocarbon fuel, represents the specific heat capacity at constant pressure of carbon dioxide.

[0091] The enthalpy of hydrocarbon fuel flue gas can be calculated by Equation 10:

[0092]

[0093] In Equation 10, H represents the enthalpy of hydrocarbon fuel flue gas, represents the molar fraction of water in the complete combustion products of hydrocarbon fuel, represents the enthalpy of water, represents the molar fraction of carbon dioxide in the complete combustion products of hydrocarbon fuel, represents the enthalpy of carbon dioxide.

[0094] According to the existing thermophysical property experimental data, the interaction and mixing between different molecules have almost no effect on their thermophysical property parameters such as density, specific heat capacity at constant pressure and enthalpy. Therefore, the corresponding physical property parameters of hydrocarbon fuel flue gas can be obtained by summing the product of their molar proportions and their corresponding physical property parameters.

[0095] In some other embodiments of the present application, in step S103, the thermophysical parameters of hydrocarbon fuel flue gas are determined according to the thermophysical parameter information of water and carbon dioxide and the molar ratio of carbon dioxide and water in the complete combustion product of hydrocarbon fuel, including:

[0096] Determine the thermophysical parameters of hydrocarbon fuel flue gas according to formula 5:

[0097]

[0098] In formula 5, F represents the thermophysical parameters of hydrocarbon fuel flue gas, Represents the molar proportion of water in the complete combustion products of hydrocarbon fuels, represents the thermophysical parameters of water, Represents the molar proportion of carbon dioxide in the complete combustion products of hydrocarbon fuels, represents the thermophysical parameters of carbon dioxide, and F, The three represent the same type of thermophysical parameters. and are mixing coefficients, which are calculated by equation 6 and equation 7 respectively:

[0099]

[0100] In Formula 6 and Formula 7, and Same as defined in Formula 5.

[0101] Carbon dioxide is a linear non-polar molecule, and water molecules are polar molecules with hydrogen bonds. The molecular structures and intermolecular forces of the two molecules are very different. When they are mixed to form flue gas, there is a van der Waals force between the carbon dioxide molecules and the water molecules. At the same time, the hydrogen bonds between the water molecules will also be affected by carbon dioxide, which will interfere with each other's movement, thereby affecting some of the thermophysical parameters of hydrocarbon fuel flue gas. In addition, some of the thermophysical parameters of the mixture are not simply linearly related to the content of each component. At low carbon dioxide concentrations, some of the thermophysical parameters of the mixture are mainly dominated by the properties of water molecules. As the concentration of carbon dioxide increases, its influence on the properties of the mixture gradually increases, showing nonlinear changes. In the calculation process, and The introduction of the mixing coefficient can correct the deviation caused by the non-ideal mixing state and nonlinear changes of carbon dioxide and water molecules, making the calculation results of thermophysical parameters more reliable.

[0102] In some embodiments of the present application, the calculation formula shown in Formula 5 has better applicability to the viscosity and thermal conductivity of hydrocarbon fuel flue gas, and can obtain more accurate calculation results for these thermophysical parameters.

[0103] The following lists the calculation methods for the viscosity and thermal conductivity of hydrocarbon fuel flue gas.

[0104] The viscosity of hydrocarbon fuel flue gas can be calculated by formula 11:

[0105]

[0106] In formula 11, η represents the viscosity of hydrocarbon fuel flue gas, Represents the molar proportion of water in the complete combustion products of hydrocarbon fuels, represents the viscosity of water, Represents the molar proportion of carbon dioxide in the complete combustion products of hydrocarbon fuels, represents the viscosity of carbon dioxide, and are the viscosity mixing coefficients, which are calculated by equations 12 and 13 respectively:

[0107]

[0108] The thermal conductivity of hydrocarbon fuel flue gas can be calculated by formula 14:

[0109]

[0110] In formula (14), λ represents the thermal conductivity of hydrocarbon fuel flue gas, Represents the molar proportion of water in the complete combustion products of hydrocarbon fuels, represents the thermal conductivity of water, Represents the molar proportion of carbon dioxide in the complete combustion products of hydrocarbon fuels, represents the viscosity of carbon dioxide, and are the mixing coefficients of thermal conductivity, which are calculated by equations 15 and 16 respectively:

[0111]

[0112] In some embodiments of the present application, the temperature of the hydrocarbon fuel flue gas is ≤2000K. When it is higher than 2000K, the water and carbon dioxide produced by the complete combustion of the hydrocarbon fuel may be ionized, decomposed, etc., resulting in a deviation between the actual content of water and carbon dioxide in the flue gas and the theoretically calculated content, thereby affecting the accuracy of the calculation result. Therefore, the method for calculating the thermophysical property parameters of the hydrocarbon fuel flue gas provided in the present application has higher accuracy in calculating the hydrocarbon fuel flue gas with a temperature ≤2000K. Exemplarily, the temperature of the hydrocarbon fuel flue gas can be 400K, 600K, 800K, 1000K, 1200K, 1400K, 1600K, 1800K, 2000K or a range consisting of any two of the foregoing values.

[0113] The second aspect of the present application provides a device for calculating the thermophysical property parameters of hydrocarbon fuel flue gas. Figure 2 This is a schematic diagram of a device for calculating the thermophysical property parameters of hydrocarbon fuel flue gas provided in an embodiment of the present application. Figure 2 The device 10 for calculating the thermophysical property parameters of hydrocarbon fuel flue gas comprises:

[0114] An acquisition module 11 is used to acquire chemical composition information of hydrocarbon fuels and thermophysical property parameter information of water and carbon dioxide;

[0115] The processing module 12 is used to determine the molar ratio of carbon dioxide and water in the complete combustion product of the hydrocarbon fuel according to the chemical composition information of the hydrocarbon fuel;

[0116] The determination module 13 is used to determine the thermophysical property parameters of the hydrocarbon fuel flue gas according to the thermophysical property parameter information of water and carbon dioxide and the molar ratio of carbon dioxide and water in the complete combustion product of the hydrocarbon fuel.

[0117] Since the implementation scheme of the above-mentioned device for calculating the thermophysical property parameters of hydrocarbon fuel flue gas to solve the problem is similar to the method for calculating the thermophysical property parameters of hydrocarbon fuel flue gas, the implementation of the specific device can refer to the implementation of the above-mentioned method, and the repeated parts will not be repeated.

[0118] A third aspect of the present application provides a computer device, Figure 3 For a schematic diagram of a computer device provided in an embodiment of the present application, see Figure 3 The computer device 20 includes a processor 21 and a memory 22 in communication with the processor 21. The memory 22 stores computer executable instructions, and the processor 21 executes the computer executable instructions stored in the memory to implement the method for calculating the thermophysical property parameters of hydrocarbon fuel flue gas provided in any of the above embodiments.

[0119] A fourth aspect of the present application provides a computer-readable storage medium, which stores computer-executable instructions. When the instructions are executed, the computer-executable instructions are executed by a processor to implement a method for calculating the thermal physical properties of hydrocarbon fuel flue gas as provided in any of the above embodiments.

[0120] It should be noted that the computer-readable storage medium may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disk, or a compact disc read-only memory (CD-ROM), etc. It may also be various electronic devices including one or any combination of the above memories, such as mobile phones, computers, tablet devices, personal digital assistants, etc.

[0121] It should be noted that, in this article, the terms "include", "comprises" or any other variations 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, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0122] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0123] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes 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, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0124] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0125] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0126] The following is an introduction to the method for calculating the thermophysical property parameters of hydrocarbon fuel flue gas provided in the present application based on specific embodiments.

[0127] Example 1

[0128] This embodiment provides a method for calculating the viscosity of kerosene smoke, comprising the following steps:

[0129] 1) The chemical composition of kerosene is C 12 H 23 , query the single component physical parameter database, and obtain the viscosity of water and carbon dioxide at a pressure of 0.1MPa and a temperature range of 400K to 2000K, as shown in Table 1:

[0130] Table 1

[0131]

[0132]

[0133] 2) According to the average chemical composition of kerosene is C 12 H 23 , determine the chemical reaction equation for the complete combustion of kerosene in oxygen: C 12 H 23 +17.75O 2 =11.5H 2 O+12CO 2 , and then determine the molar proportion of carbon dioxide in the complete combustion products of kerosene as The molar percentage of water is

[0134] 3) According to equations 11, 12 and 13, the viscosity values ​​of kerosene smoke at a pressure of 0.1 MPa and temperatures of 500 K, 750 K, 1000 K, 1250 K, 1500 K, 1750 K and 2000 K are calculated, as shown in Table 2:

[0135] Table 2

[0136] Temperature T(K) 500 750 1000 1250 1500 1750 2000 <![CDATA[黏度η 计算 (μPa·s)]]> 26.3 37.9 47.8 56.4 64.0 70.8 76.9

[0137] According to the literature "Calculation of Thermophysical Parameters and Transport Coefficients of Oxygen / Kerosene Engine Gas", the literature values ​​of kerosene flue gas at a pressure of 0.1 MPa and a temperature of 500-2000K are shown in Table 3:

[0138] Table 3

[0139] Temperature T(K) 500 600 700 800 900 1000 1100 1200 Viscosity η reference (μPa·s) 25.3 29.7 33.9 37.8 41.5 45.0 48.4 51.6 Temperature T(K) 1300 1400 1500 1600 1700 1800 1900 2000 Viscosity η reference (μPa·s) 54.9 58.0 60.9 63.9 66.7 69.6 72.4 75.1

[0140] 4) Based on the data in Table 2 and Table 3, a comparison chart of the kerosene smoke viscosity versus temperature calculated by the calculation method of the present application and reported in the literature is drawn, see Figure 4 , the viscosity η is fitted by binary linear regression 计算 The linear regression equation with temperature T is: η 计算 =0.0415T 3 -1.0277T 2 +14.295T+13.021; viscosity η 文献 The linear regression equation with temperature T is: η 文献 =0.001T 3 -0.024T 2 +100.14T+399.82According to It is calculated that the maximum deviation between the viscosity value calculated by the calculation method of the present application and the viscosity value in the literature is less than 6%, and its calculation accuracy fully meets the calculation requirement of no more than 10% deviation in engineering, thereby verifying that the calculation method of the present application has high accuracy.

[0141] Example 2

[0142] This embodiment provides a method for calculating thermophysical parameters such as density, thermal conductivity, specific heat capacity at constant pressure, viscosity, and enthalpy of methane flue gas, comprising the following steps:

[0143] 1) The chemical composition of methane is CH 4 , query the single component physical parameter database, and obtain the density, thermal conductivity, constant pressure specific heat capacity, viscosity and enthalpy of water and carbon dioxide at different pressures of 0.1MPa, 1MPa, 10MPa and 30MPa and temperatures of 500K~2000K. The specific values ​​are shown in Table 4 and Table 5 respectively:

[0144] Table 4

[0145]

[0146]

[0147] Table 5

[0148]

[0149]

[0150]

[0151] 2) According to the chemical composition of methane, CH 4 , determine the chemical reaction equation for the complete combustion of methane in oxygen: CH 4 +2O 2 =2H 2 O+CO 2 , and then determine the molar proportion of carbon dioxide in the complete combustion products of methane as The molar percentage of water is

[0152] 3) According to formula 8, the density of methane flue gas in the temperature range of 500K to 2000K at pressures of 0.1MPa, 1MPa, 10MPa, and 30MPa is calculated. The specific values ​​are listed in Table 6. Based on the above values, a curve comparison of the density ρ of methane flue gas at different pressures versus temperature T is drawn, see Figure 5 ;

[0153] According to formula 9, the density of methane flue gas in the temperature range of 500K to 2000K at pressures of 0.1MPa, 1MPa, 10MPa, and 30MPa is calculated. The specific values ​​are listed in Table 6. Based on the above values, the constant pressure specific heat capacity C of methane flue gas at different pressures is plotted. PThe curve comparison chart of temperature T is shown in Figure 6 ;

[0154] According to formula 10, the enthalpy of methane flue gas in the temperature range of 500K to 2000K at pressures of 0.1MPa, 1MPa, 10MPa, and 30MPa is calculated. The specific values ​​are listed in Table 6. Based on the above values, a curve comparison of the change of enthalpy H of methane flue gas at different pressures with temperature T is drawn, see Figure 7 ;

[0155] According to equations 11, 12 and 13, the viscosity of methane flue gas at pressures of 0.1MPa, 1MPa, 10MPa and 30MPa in the temperature range of 500K to 2000K is calculated. The specific values ​​are listed in Table 6. Based on the above values, a comparison curve of the viscosity of methane flue gas at different pressures versus temperature T is drawn, see Figure 8 ;

[0156] According to equations 14, 15 and 16, the thermal conductivity of methane flue gas in the temperature range of 500K to 2000K at pressures of 0.1MPa, 1MPa, 10MPa and 30MPa is calculated. The specific values ​​are listed in Table 6. Based on the above values, a curve comparison of the thermal conductivity λ of methane flue gas at different pressures versus temperature T is drawn, see Fig. 9 .

[0157] Table 6

[0158]

[0159]

[0160] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0161] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0162] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for calculating the thermophysical property parameters of hydrocarbon fuel flue gas, characterized in that: The following steps are involved: Obtain chemical composition information of hydrocarbon fuels, and thermophysical parameter information of water and carbon dioxide; Determining the molar ratio of carbon dioxide and water in the complete combustion product of the hydrocarbon fuel according to the chemical composition information of the hydrocarbon fuel; The thermophysical property parameters of the hydrocarbon fuel flue gas are determined according to the thermophysical property parameter information of water and carbon dioxide and the molar ratio of carbon dioxide and water in the complete combustion product of the hydrocarbon fuel.

2. The method for calculating thermophysical property parameters according to claim 1, characterized in that: Determining the molar ratio of carbon dioxide and water in the complete combustion product of the hydrocarbon fuel according to the chemical composition information of the hydrocarbon fuel includes: According to the chemical composition information of the hydrocarbon fuel, a reaction equation for complete combustion of the hydrocarbon fuel is determined, and the reaction equation is represented by Formula 1: In formula 1, C X H Y represents the chemical composition of hydrocarbon fuel, where X≥1, Y≥1; According to Formula 1, it is determined that the complete combustion products of the hydrocarbon fuel include Y / 2 mol of water and X mol of carbon dioxide; The molar proportions of water and carbon dioxide in the complete combustion products of the hydrocarbon fuel are determined according to Formula 2 and Formula 3, respectively: In formula 2, Represents the molar proportion of water in the complete combustion products of hydrocarbon fuels; In formula 3, Represents the molar percentage of carbon dioxide in the products of complete combustion of hydrocarbon fuels.

3. The method for calculating thermophysical property parameters according to claim 1 or 2, characterized in that: Determining the thermophysical parameters of the hydrocarbon fuel flue gas according to the thermophysical parameter information of water and carbon dioxide and the molar ratio of carbon dioxide and water in the complete combustion product of the hydrocarbon fuel includes: The thermophysical parameters of the hydrocarbon fuel flue gas are determined according to Formula 4: In formula 4, F represents the thermophysical parameters of hydrocarbon fuel flue gas, Represents the molar proportion of water in the complete combustion products of hydrocarbon fuels, represents the thermophysical parameters of water, Represents the molar proportion of carbon dioxide in the complete combustion products of hydrocarbon fuels, represents the thermophysical parameters of carbon dioxide, and F, The types of thermophysical parameters represented by the three are the same.

4. The method for calculating thermophysical property parameters according to claim 3, characterized in that: The thermophysical property parameters of the hydrocarbon fuel flue gas include one or more of density, specific heat capacity at constant pressure and enthalpy.

5. The method for calculating thermophysical property parameters according to claim 1 or 2, characterized in that: Determining the thermophysical parameters of the hydrocarbon fuel flue gas according to the thermophysical parameter information of water and carbon dioxide and the molar ratio of carbon dioxide and water in the complete combustion product of the hydrocarbon fuel includes: The thermophysical parameters of the hydrocarbon fuel flue gas are determined according to Formula 5: In formula 5, F represents the thermophysical parameters of hydrocarbon fuel flue gas, Represents the molar proportion of water in the complete combustion products of hydrocarbon fuels, represents the thermophysical parameters of water, Represents the molar proportion of carbon dioxide in the complete combustion products of hydrocarbon fuels, represents the thermophysical parameters of carbon dioxide, and F, The three represent the same type of thermophysical parameters. and are mixing coefficients, which are calculated by equation 6 and equation 7 respectively: In Formula 6 and Formula 7, and Same as defined in Formula 5.

6. The method for calculating thermophysical property parameters according to claim 5, characterized in that: The thermophysical property parameters of the hydrocarbon fuel include viscosity and / or thermal conductivity.

7. The method for calculating thermophysical property parameters according to any one of claims 1, 2, 4 or 6, characterized in that: The temperature of the hydrocarbon fuel flue gas is ≤2000K.

8. A device for calculating the thermophysical property parameters of hydrocarbon fuel flue gas, characterized in that: include: An acquisition module is used to obtain chemical composition information of hydrocarbon fuels and thermophysical parameter information of water and carbon dioxide; A processing module, used to determine the molar ratio of carbon dioxide and water in the complete combustion product of the hydrocarbon fuel according to the chemical composition information of the hydrocarbon fuel; The determination module is used to determine the thermophysical property parameters of the hydrocarbon fuel flue gas according to the thermophysical property parameter information of the water and carbon dioxide and the molar ratio of carbon dioxide and water in the complete combustion product of the hydrocarbon fuel.

9. A computer device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method for calculating the thermophysical property parameters of hydrocarbon fuel flue gas according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed, the computer executes the method for calculating the thermophysical property parameters of hydrocarbon fuel flue gas according to any one of claims 1 to 7.

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