Method and equipment for determining parameters of heat storage type superheater and storage medium

Abstract

The invention provides a parameter determination method and device for a heat storage type superheater and a computer readable storage medium. The method comprises the following steps: determining the heat demand of heating steam from a saturated state to a target superheat temperature; according to the heat transfer coefficient of the heat transfer pipe, the outer surface heat exchange area of the heat transfer pipe, the first temperature difference of the steam inlet end of the heat transfer pipe and the second temperature difference of the steam outlet end of the heat transfer pipe, the heat exchange amount transferred to steam by the heat transfer pipe is determined; wherein the first temperature difference is used for representing the temperature difference between the steam inlet end heat storage body and the steam, and the second temperature difference is used for representing the temperature difference between the steam outlet end heat storage body and the steam; the heat release amount of the heat storage body is determined according to the heat release density of the heat storage body, the heat exchange area of the outer surface of the heat transfer pipe and the characteristic length and the heat diffusion coefficient of the heat storage body; and under the condition that it is determined that the heat release amount, the heat exchange amount and the heat demand amount meet the preset heat balance condition, the current parameter value of the heat storage type superheater is determined as the optimal parameter value.

Description

Technical Field

[0001] This application relates to the field of nuclear power technology, and in particular to a method, apparatus and computer-readable storage medium for determining parameters of a thermal storage superheater. Background Technology

[0002] In nuclear power plant accident simulation tests, high-pressure saturated steam needs to be heated to over 450°C within a very short time to simulate extreme conditions such as loss of water, depressurization, and over-design-baseline accidents. Existing test equipment generally uses online electric heating or gas-fired boilers as steam sources, but these methods suffer from high power requirements, large thermal inertia, slow response, and susceptibility to damage to high-temperature components. Especially under high-pressure (≥1.5MPa) and transient temperature rise (approximately 90°C within 1 second), traditional superheating schemes struggle to achieve rapid, reliable, and repeatable heat output.

[0003] Meanwhile, existing test benches rely on large steam storage tanks to store steam, resulting in large system volume, high energy consumption, and difficult equipment maintenance, making it difficult to meet the needs of high-frequency, multi-parameter nuclear power accident simulation. Therefore, there is an urgent need for a superheater structure with low-power heat storage and transient high-power heat release, as well as a parameter optimization method, to overcome the technical problems of slow thermal response, insufficient transient power, and poor safety of traditional solutions. Summary of the Invention

[0004] This application provides a method, device, and computer-readable storage medium for determining parameters of a thermal storage superheater, which can achieve rapid, reliable, and repeatable heat output.

[0005] In a first aspect, embodiments of this application provide a method for determining parameters of a thermal storage superheater. The thermal storage superheater includes a thermal storage body and heat transfer tubes. The thermal storage body has a through hole, and the heat transfer tubes pass through the thermal storage body through the through hole. Steam flows through the thermal storage body via the heat transfer tubes to raise the temperature of the steam. The method includes:

[0006] Determine the heat requirement for heating the steam from a saturated state to the target superheated temperature;

[0007] The amount of heat transferred from the heat transfer tube to the steam is determined based on the heat transfer coefficient of the heat transfer tube, the heat exchange area of ​​the outer surface of the heat transfer tube, the first temperature difference at the steam inlet end of the heat transfer tube, and the second temperature difference at the steam outlet end of the heat transfer tube; wherein, the first temperature difference is used to represent the temperature difference between the heat storage body and the steam at the steam inlet end, and the second temperature difference is used to represent the temperature difference between the heat storage body and the steam at the steam outlet end.

[0008] The heat release of the heat storage body is determined based on the heat release density of the heat storage body, the heat transfer area of ​​the outer surface of the heat transfer tube, the characteristic length of the heat storage body, and the thermal diffusivity.

[0009] When the heat release, heat exchange, and heat demand meet the preset heat balance conditions, the current parameter values ​​of the thermal storage superheater are determined as the optimal parameter values; wherein, the heat balance conditions are heat release ≥ heat exchange ≥ heat demand, and the parameters of the thermal storage superheater include at least one of the following: the material, shape, characteristic length, mass of the thermal storage body, the number and size of the through holes, and the size of the heat transfer tube.

[0010] Secondly, embodiments of this application provide a parameter determination device for a thermal storage superheater. The thermal storage superheater includes a thermal storage body and a heat transfer tube. The thermal storage body has a through hole, and the heat transfer tube passes through the thermal storage body through the through hole. Steam flows through the thermal storage body via the heat transfer tube to raise the temperature of the steam. The device includes:

[0011] The first determining module is used to determine the heat requirement for heating the steam from a saturated state to a target superheated temperature.

[0012] The second determining module is used to determine the amount of heat transferred from the heat transfer tube to the steam based on the heat transfer coefficient of the heat transfer tube, the heat exchange area of ​​the outer surface of the heat transfer tube, the first temperature difference at the steam inlet end of the heat transfer tube, and the second temperature difference at the steam outlet end of the heat transfer tube; wherein, the first temperature difference is used to represent the temperature difference between the heat storage body and the steam at the steam inlet end, and the second temperature difference is used to represent the temperature difference between the heat storage body and the steam at the steam outlet end;

[0013] The third determining module is used to determine the heat release of the heat storage body based on the heat release density of the heat storage body, the heat transfer area of ​​the outer surface of the heat transfer tube, the characteristic length of the heat storage body and the thermal diffusivity.

[0014] The fourth determining module is used to determine the current parameter value of the thermal storage body as the optimal parameter value when the heat release, heat exchange, and heat demand meet the preset heat balance conditions; wherein, the heat balance conditions are heat release ≥ heat exchange ≥ heat demand, and the parameters of the thermal storage superheater include at least one of the following: the material, shape, characteristic length, mass, number and size of the through holes of the thermal storage body.

[0015] Thirdly, embodiments of this application provide an electronic device, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of the method for determining parameters of a thermal storage superheater provided in the first aspect of embodiments of this application.

[0016] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program thereon, wherein when the computer program is executed by a processor, it implements the steps of the method for determining parameters of a thermal storage superheater provided in the first aspect of embodiments of this application.

[0017] Fifthly, embodiments of this application provide a computer program product having a computer program stored thereon. When the computer program is executed by a processor, it implements the steps of the method for determining parameters of a thermal storage superheater provided in the first aspect of embodiments of this application.

[0018] The technical solution provided in this application calculates the heat demand for heating steam from a saturated state to a target superheated temperature, the heat exchange from the heat transfer tube to the steam, and the heat release from the heat storage body. It then compares whether the heat release, heat exchange, and heat demand meet the heat balance condition to determine the optimal parameter values ​​of the heat storage superheater. The heat storage superheater obtained in this way can quickly achieve temperature rise after the steam flows through the heat storage body without storing steam, thus meeting the requirements for rapid, reliable, and repeatable heat output and reducing energy consumption. At the same time, this method can quickly find the optimal parameter values ​​of the heat storage superheater, improving parameter optimization efficiency. Attached Figure Description

[0019] Figure 1 A cross-sectional schematic diagram of a heat storage superheater provided in an embodiment of this application;

[0020] Figure 2 A flowchart illustrating a method for determining parameters of a thermal storage superheater provided in an embodiment of this application;

[0021] Figure 3 A schematic diagram of a parameter determination device for a thermal storage superheater provided in an embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining this application and are not intended to limit this application. Those skilled in the art can make adjustments as needed to suit specific application scenarios. Furthermore, it should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, not the entire structure.

[0024] like Figure 1As shown in the illustration, this application provides a thermal storage superheater, which may include a thermal storage body and a heat transfer tube. The thermal storage body has a through-hole, through which the heat transfer tube passes. Optionally, the thermal storage body may be made of a metal material with high thermal diffusivity, such as aluminum, copper, or steel. The heat transfer tube may be a metal tube resistant to high temperature and pressure. The thermal storage superheater may further include a heating element (…). Figure 1 (Not shown in the image) Heating elements are inserted into the thermal storage body to preheat it, bringing it to the required operating temperature. This thermal storage superheater can be used in nuclear power accident simulation tests. Its specific working principle is as follows: the thermal storage body is preheated to the target temperature (e.g., 450~520℃) by the heating elements. After the nuclear power accident simulation test begins, saturated steam flows into the thermal storage body through heat transfer tubes. A large temperature difference is formed between the steam and the high-temperature thermal storage body, resulting in transient convection heat transfer and rapid superheating of the steam.

[0025] After determining the overall architecture of the thermal storage superheater, its parameters can be determined using the following methods to meet the superheating requirements of saturated steam. The parameters of the thermal storage superheater include at least one of the following: the material and shape of the thermal storage body (e.g., cylindrical, hexagonal, etc.), characteristic length (e.g., thickness or radial parameter), mass, the number and size of the through holes, and the dimensions of the heat transfer tubes (wall thickness, inner tube diameter, inner tube outer diameter, etc.).

[0026] Next, the parameter determination process for a thermal storage superheater will be described in detail. It should be noted that the method provided in this application embodiment can be executed by a thermal storage superheater parameter determination device. This device can be implemented as part or all of an electronic device through software, hardware, or a combination of both. Optionally, the electronic device can be a personal computer, smartphone, tablet computer, or server, etc. This disclosure does not limit the specific form of the electronic device. The following method embodiments are described using an electronic device as an example.

[0027] Specifically, such as Figure 2 As shown, the method may include:

[0028] S201. Determine the heat requirement for heating steam from its saturated state to the target superheated temperature.

[0029] Specifically, the heat requirement for heating steam from a saturated state to the target superheated temperature can be determined based on the steam flow rate in the saturated state, the inlet specific enthalpy of the saturated steam flowing into the thermal storage body, the outlet specific enthalpy of the superheated steam leaving the thermal storage body, and the duration of the test. The aforementioned inlet specific enthalpy, outlet specific enthalpy, and test duration can be determined by the test requirements.

[0030] Alternatively, the above heat demand can be determined using the following formula or a variation thereof. :

[0031] ;

[0032] in, Indicates steam mass flow rate, Indicates the specific enthalpy value at the inlet. Indicates the export enthalpy value, Indicates the duration of the experiment.

[0033] S202. Determine the amount of heat transferred from the heat transfer tube to the steam based on the heat transfer coefficient of the heat transfer tube, the heat exchange area of ​​the outer surface of the heat transfer tube, the first temperature difference at the steam inlet end of the heat transfer tube, and the second temperature difference at the steam outlet end of the heat transfer tube.

[0034] The first temperature difference represents the temperature difference between the heat storage body and the steam at the steam inlet end, and the second temperature difference represents the temperature difference between the heat storage body and the steam at the steam outlet end. The heat transfer area of ​​the outer surface of the heat transfer tube is related to the radius of the through-hole and the thickness of the heat storage body. For example, the perimeter of the through-hole can be calculated using its radius, and the heat transfer area of ​​the outer surface of the heat transfer tube can be calculated based on the perimeter of the through-hole and the thickness of the heat storage body. It is understood that the radius of the through-hole and the thickness of the heat storage body are parameters to be optimized.

[0035] The thermal storage body transfers heat to the heat transfer tubes, which in turn transfer the heat to the saturated steam, thus raising the temperature of the saturated steam. Optionally, the heat transfer from the heat transfer tubes to the steam can be determined using the following formula or a variation thereof. :

[0036] ;

[0037] ;

[0038] in, This indicates the heat transfer coefficient of the heat transfer tube. This indicates the heat transfer area of ​​the outer surface of the heat transfer tube. This indicates the second temperature difference. This indicates the first temperature difference.

[0039] S203. Determine the heat release of the thermal storage body based on the heat release density of the thermal storage body, the heat exchange area of ​​the outer surface of the heat transfer tube, the characteristic length of the thermal storage body, and the thermal diffusivity.

[0040] Alternatively, the heat release of the thermal storage body can be determined using the following formula or a variation thereof. :

[0041] ;

[0042] ;

[0043] in, The value represents the heat release density of the thermal storage body, and L represents the characteristic length (such as thickness or radius) of the thermal storage body. This indicates the effective heat release time when the heat storage body releases heat at the aforementioned heat release density.

[0044] S204. If the heat release, heat exchange, and heat demand meet the preset heat balance conditions, the current parameter values ​​of the heat storage superheater shall be determined as the optimal parameter values.

[0045] The heat balance condition is that the heat released is greater than or equal to the heat exchanged, which in turn is greater than or equal to the heat demand.

[0046] After obtaining the heat release, heat exchange, and heat demand, it is determined whether the three meet the preset heat balance conditions. If they do, it means that the current design parameter values ​​of the thermal storage superheater can meet the superheating requirements of the test. The current parameter values ​​can then be determined as the optimal parameter values, thereby obtaining the designed thermal storage superheater.

[0047] Optionally, if the heat release, heat exchange, and heat demand do not meet the preset heat balance conditions, it means that the current design parameters of the thermal storage superheater cannot meet the superheating requirements of the test. In this case, the current parameter values ​​can be adjusted, for example, by adjusting the material, shape, characteristic length, mass, number and size of through holes, and / or the size of the heat transfer tubes of the thermal storage body. Further, the steps S202-S204 above are continued according to the adjusted parameter values ​​until the determined heat release, heat exchange, and heat demand meet the heat balance conditions, thereby obtaining the optimal parameter values ​​of the thermal storage superheater.

[0048] The method for determining parameters of a thermal storage superheater provided in this application calculates the heat demand for heating steam from a saturated state to the target superheat temperature, the heat exchange from the heat transfer tubes to the steam, and the heat release from the thermal storage body. By comparing whether the heat release, heat exchange, and heat demand meet the heat balance condition, the optimal parameter values ​​of the thermal storage superheater are determined. The thermal storage superheater obtained in this way can quickly achieve temperature rise after steam flows through the thermal storage body without the need to store steam, thus meeting the requirements for rapid, reliable, and repeatable heat output and reducing energy consumption. At the same time, this method can quickly find the optimal parameter values ​​of the thermal storage superheater, improving parameter optimization efficiency.

[0049] In one embodiment, optionally, the heat release density of the thermal storage body can also be obtained by the following process: determining the heat release density of the thermal storage body based on the real-time temperatures of the thermal storage body and the heat transfer tube, as well as the contact thermal resistance between the thermal storage body and the heat transfer tube.

[0050] In this embodiment, the thermal storage body satisfies the one-dimensional (or radial) Fourier thermal diffusion equation:

[0051] ;

[0052] in, Indicates the temperature of the thermal storage body, This represents the thermal diffusivity of the thermal storage body. The equation indicates the direction of calculation (such as radial or thickness direction of the thermal storage body) and gives the decay characteristics of the heat release rate of the thermal storage body.

[0053] Alternatively, the heat release density of the thermal storage body can be determined using the following formula or a variation thereof:

[0054] ;

[0055] in, This represents the real-time temperature of the thermal storage body, which can be obtained using the Fourier heat diffusion equation mentioned above. This indicates the real-time temperature of the heat transfer tube. This indicates the contact thermal resistance between the thermal storage body and the heat transfer tube.

[0056] Assume the initial temperature of the thermal storage body is T at t0. Al,0 It is known that the real-time temperature of the thermal storage body after operating for t seconds is T. Al,t Then T Al (t)=T Al,t =T Al,0 + The temperature of the heat transfer tube is solved by coupling through a thermal resistance network. The heat flux density transferred from the heat storage body to the heat transfer tube is the same as the heat flux density transferred from the heat transfer tube to the steam, which are obtained from the thermal diffusion equation of the heat storage body and the physical properties of the steam, respectively. and the real-time temperature of steam and through contact thermal resistance Pipe wall heat transfer thermal resistance and the convective heat transfer coefficient inside the pipe Simultaneous solution Contact thermal resistance Pipe wall heat transfer thermal resistance and the convective heat transfer coefficient inside the pipe As shown in the following examples.

[0057] Optionally, the contact thermal resistance between the thermal storage body and the heat transfer tube can be determined based on the gap between the thermal storage body and the heat transfer tube, the contact pressure, and the surface roughness of the thermal storage body and the heat transfer tube. Specifically, the smaller the gap between the thermal storage body and the heat transfer tube, the greater the contact pressure, and the smaller the contact thermal resistance between them.

[0058] Alternatively, the heat transfer coefficient of the heat transfer tube can be obtained through the following process: obtaining the tube wall thermal resistance, the external heat transfer coefficient, the internal convective heat transfer coefficient, and the contact thermal resistance between the heat storage body and the heat transfer tube; and determining the heat transfer coefficient of the heat transfer tube based on the tube wall thermal resistance, the external heat transfer coefficient, the internal convective heat transfer coefficient, and the contact thermal resistance.

[0059] Specifically, the heat transfer path from the thermal storage body to the steam can include: heat transfer from the thermal storage body to the outer wall of the heat transfer tube, heat transfer from the outer wall of the heat transfer tube to the inner wall, and heat transfer from the inner wall of the heat transfer tube to the steam. Based on this, the heat transfer coefficient of the heat transfer tube can be calculated using the relevant parameters involved in the above heat transfer path. Optionally, the heat transfer coefficient of the heat transfer tube can be determined using the following formula or a variation of the formula. :

[0060] ;

[0061] in, Indicates the convective heat transfer coefficient inside the pipe. Indicates the external heat transfer coefficient. This indicates the thermal resistance of the heat transfer tube wall. This indicates the contact thermal resistance between the thermal storage body and the heat transfer tube.

[0062] Optionally, the wall thermal resistance of the heat transfer tube can be determined based on the tube's length, inner tube diameter, outer tube diameter, and the thermal conductivity of the tube material. Alternatively, the wall thermal resistance can be determined using the following formula or a variation thereof. :

[0063] ;

[0064] in, Indicates the outer tube diameter. Indicates the inner tube diameter. This indicates the thermal conductivity of the heat transfer tube material, which is related to the material of the heat transfer tube. This indicates the length of the heat transfer tube.

[0065] Optionally, the convective heat transfer coefficient inside the heat transfer tube can be determined based on the steam density, the steam velocity inside the tube, the inner tube diameter, the steam dynamic viscosity, the fluid thermal conductivity, and parameters related to the flow channel structure. Alternatively, the convective heat transfer coefficient inside the heat transfer tube can be determined using the following formula or a variation thereof. :

[0066] ;

[0067] in, This represents parameters related to the flow channel structure. Indicates the density of steam. This indicates the vapor velocity inside the heat transfer tube. This indicates the inner diameter of the heat transfer tube. Indicates the thermal conductivity of a fluid. , Indicates the dynamic viscosity of steam This represents the specific heat capacity of steam at constant pressure. This represents the thermal diffusivity of steam.

[0068] In one embodiment, optionally, to meet the superheating requirements of saturated steam, the mass of the thermal storage body needs to be greater than or equal to a first value. This first value can be obtained through the following process: determining the first value based on the heat demand, a preset heat loss coefficient, the specific heat capacity of the thermal storage body, the highest operating temperature, and the lowest operating temperature. Optionally, the first value can be determined using the following formula or a variation of the formula:

[0069] ;

[0070] ;

[0071] in, This represents the heat requirement for heating steam from its saturated state to the target superheated temperature. Indicates the heat loss coefficient. The specific heat capacity of the thermal storage medium is related to the material of the thermal storage medium. This indicates the highest operating temperature of the thermal storage unit. This indicates the minimum operating temperature of the thermal storage unit. The maximum and minimum operating temperatures are also related to the superheating requirements.

[0072] In this embodiment, the parameters of the thermal storage superheater are optimized by comprehensively considering the material properties of the thermal storage body, thermal diffusion behavior, transient heat exchange requirements of steam, structural parameters of the heat transfer tube, coupling relationship of the heat transfer path, and thermal balance constraints, so that the final determined parameters can meet the superheating requirements of the experiment and improve the efficiency of parameter optimization.

[0073] Figure 3 This is a schematic diagram of a device for determining parameters of a thermal storage superheater provided in an embodiment of this application. Figure 3 As shown, the device may include a first determining module 301, a second determining module 302, a third determining module 303, and a fourth determining module 304.

[0074] Specifically, the first determining module 301 is used to determine the heat requirement for heating steam from a saturated state to a target superheated temperature;

[0075] The second determining module 302 is used to determine the amount of heat transfer from the heat transfer tube to the steam based on the heat transfer coefficient of the heat transfer tube, the heat transfer area of ​​the outer surface of the heat transfer tube, the first temperature difference at the steam inlet end of the heat transfer tube and the second temperature difference at the steam outlet end of the heat transfer tube; wherein, the first temperature difference is used to represent the temperature difference between the heat storage body and the steam at the steam inlet end, and the second temperature difference is used to represent the temperature difference between the heat storage body and the steam at the steam outlet end.

[0076] The third determining module 303 is used to determine the heat release of the thermal storage body based on the heat release density of the thermal storage body, the heat transfer area of ​​the outer surface of the heat transfer tube, the characteristic length of the thermal storage body and the thermal diffusivity.

[0077] The fourth determining module 304 is used to determine the current parameter value of the thermal storage body as the optimal parameter value when the heat release, heat exchange and heat demand meet the preset heat balance conditions; wherein, the heat balance condition is heat release ≥ heat exchange ≥ heat demand, and the parameters of the thermal storage superheater include at least one of the following: material, shape, characteristic length, mass, number and size of through holes of the thermal storage body.

[0078] Optionally, based on the above embodiments, it also includes a parameter adjustment module.

[0079] Specifically, the parameter adjustment module is used to adjust the current parameter values ​​of the thermal storage superheater when it is determined that the heat release, heat exchange, and heat demand do not meet the preset heat balance conditions. Based on the adjusted parameter values, it continues to execute the step of determining the heat exchange transferred from the heat transfer tube to the steam based on the heat transfer coefficient of the heat transfer tube, the heat exchange area of ​​the outer surface of the heat transfer tube, the first temperature difference at the steam inlet end of the heat transfer tube, and the second temperature difference at the steam outlet end of the heat transfer tube, until the heat release, heat exchange, and heat demand meet the heat balance conditions.

[0080] Based on the above embodiments, optionally, the third determining module 303 is further configured to determine the heat release density of the heat storage body based on the real-time temperature of the heat storage body and the heat transfer tube, as well as the contact thermal resistance between the heat storage body and the heat transfer tube.

[0081] Based on the above embodiments, optionally, the second determining module 302 is further used to obtain the heat transfer resistance of the tube wall, the heat transfer coefficient outside the tube, the convection heat transfer coefficient inside the tube, and the contact heat resistance between the heat storage body and the heat transfer tube; and to determine the heat transfer coefficient of the heat transfer tube based on the heat transfer resistance of the tube wall, the heat transfer coefficient outside the tube, the convection heat transfer coefficient inside the tube, and the contact heat resistance.

[0082] Based on the above embodiments, optionally, the contact thermal resistance is obtained through the following process: determining the contact thermal resistance based on the gap between the heat storage body and the heat transfer tube, the contact pressure, and the surface roughness of the heat storage body and the heat transfer tube.

[0083] Based on the above embodiments, optionally, the heat transfer resistance of the pipe wall is obtained through the following process: the heat transfer resistance of the pipe wall is determined according to the length of the heat transfer pipe, the inner pipe diameter, the outer pipe diameter and the thermal conductivity of the pipe material.

[0084] Based on the above embodiments, optionally, the convective heat transfer coefficient inside the tube is obtained through the following process: the convective heat transfer coefficient inside the tube is determined according to the steam density, the steam velocity inside the heat transfer tube, the inner tube diameter, the steam dynamic viscosity, the fluid thermal conductivity, and parameters related to the flow channel structure.

[0085] Based on the above embodiments, optionally, the mass of the thermal storage body is greater than or equal to a first value, which is obtained through the following process: determining the first value based on the heat demand, the preset heat loss coefficient, the specific heat capacity of the thermal storage body, the highest operating temperature, and the lowest operating temperature.

[0086] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of this application, such as... Figure 4 As shown, the device includes a processor 40, a memory 41, an input device 42, and an output device 43; the number of processors 40 in the device can be one or more. Figure 4 Taking a processor 40 as an example; the processor 40, memory 41, input device 42, and output device 43 in this device can be connected via a bus or other means. Figure 4 Taking the example of a connection between China and Israel via a bus.

[0087] The memory 41, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the method for determining parameters of a thermal storage superheater in the embodiments of this application (e.g., the first determining module 301, the second determining module 302, the third determining module 303, and the fourth determining module 304 in the thermal storage superheater parameter determining device). The processor 40 executes various functional applications and data processing of the device by running the software programs, instructions, and modules stored in the memory 41, thereby realizing the above-described method for determining parameters of a thermal storage superheater.

[0088] The memory 41 may primarily include a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a given function; the data storage area may store data created during the determination of parameters for the thermal storage superheater. Furthermore, the memory 41 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 41 may further include memory remotely located relative to the processor 40, which can be connected to a device / terminal / server via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0089] Input device 42 can be used to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the electronic device. Output device 43 may include display devices such as a display screen.

[0090] In one embodiment, a computer-readable storage medium is also provided, on which a computer program is stored, the computer program performing the following steps when executed by a processor:

[0091] Determine the heat requirement for heating steam from its saturated state to the target superheated temperature;

[0092] The amount of heat transferred from the heat transfer tube to the steam is determined based on the heat transfer coefficient of the heat transfer tube, the heat exchange area of ​​the outer surface of the heat transfer tube, the first temperature difference at the steam inlet end of the heat transfer tube, and the second temperature difference at the steam outlet end of the heat transfer tube. The first temperature difference is used to represent the temperature difference between the heat storage body and the steam at the steam inlet end, and the second temperature difference is used to represent the temperature difference between the heat storage body and the steam at the steam outlet end.

[0093] The heat release of the thermal storage body is determined based on the heat release density of the thermal storage body, the heat transfer area of ​​the outer surface of the heat transfer tube, the characteristic length of the thermal storage body, and the thermal diffusivity.

[0094] Under the condition that the heat release, heat exchange, and heat demand meet the preset heat balance conditions, the current parameter values ​​of the thermal storage superheater are determined as the optimal parameter values; wherein, the heat balance conditions are heat release ≥ heat exchange ≥ heat demand, and the parameters of the thermal storage superheater include at least one of the following: the material, shape, characteristic length, mass, number and size of through holes, and size of heat transfer tubes of the thermal storage body.

[0095] In one embodiment, a computer program product is also provided, on which a computer program is stored, which, when executed by a processor, performs the following steps:

[0096] Determine the heat requirement for heating steam from its saturated state to the target superheated temperature;

[0097] The amount of heat transferred from the heat transfer tube to the steam is determined based on the heat transfer coefficient of the heat transfer tube, the heat exchange area of ​​the outer surface of the heat transfer tube, the first temperature difference at the steam inlet end of the heat transfer tube, and the second temperature difference at the steam outlet end of the heat transfer tube. The first temperature difference is used to represent the temperature difference between the heat storage body and the steam at the steam inlet end, and the second temperature difference is used to represent the temperature difference between the heat storage body and the steam at the steam outlet end.

[0098] The heat release of the thermal storage body is determined based on the heat release density of the thermal storage body, the heat transfer area of ​​the outer surface of the heat transfer tube, the characteristic length of the thermal storage body, and the thermal diffusivity.

[0099] Under the condition that the heat release, heat exchange, and heat demand meet the preset heat balance conditions, the current parameter values ​​of the thermal storage superheater are determined as the optimal parameter values; wherein, the heat balance conditions are heat release ≥ heat exchange ≥ heat demand, and the parameters of the thermal storage superheater include at least one of the following: the material, shape, characteristic length, mass, number and size of through holes, and size of heat transfer tubes of the thermal storage body.

[0100] The thermal storage superheater parameter determination device, electronic device, computer-readable storage medium, and computer program product provided in the above embodiments can execute the thermal storage superheater parameter determination method provided in any embodiment of this application, and have the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in the above embodiments can be found in the thermal storage superheater parameter determination method provided in any embodiment of this application.

[0101] Based on the above description of the implementation methods, those skilled in the art can clearly understand that this application can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of the various embodiments of this application.

[0102] It is worth noting that the units and modules included in the above embodiments are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional unit are only for easy differentiation and are not used to limit the scope of protection of this application.

[0103] Note that the above description is merely a preferred embodiment and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of this application, and the scope of this application is determined by the scope of the appended claims.

Claims

1. A method for determining parameters of a thermal storage superheater, characterized in that, The thermal storage superheater includes a thermal storage body and a heat transfer tube. The thermal storage body has a through-hole, and the heat transfer tube passes through the thermal storage body via the through-hole. Steam flows through the thermal storage body via the heat transfer tube to raise the temperature of the steam. The method includes: Determine the heat requirement for heating the steam from a saturated state to the target superheated temperature; The amount of heat transferred from the heat transfer tube to the steam is determined based on the heat transfer coefficient of the heat transfer tube, the heat exchange area of ​​the outer surface of the heat transfer tube, the first temperature difference at the steam inlet end of the heat transfer tube, and the second temperature difference at the steam outlet end of the heat transfer tube; wherein, the first temperature difference is used to represent the temperature difference between the heat storage body and the steam at the steam inlet end, and the second temperature difference is used to represent the temperature difference between the heat storage body and the steam at the steam outlet end. The heat release of the heat storage body is determined based on the heat release density of the heat storage body, the heat transfer area of ​​the outer surface of the heat transfer tube, the characteristic length of the heat storage body, and the thermal diffusivity. When the heat release, heat exchange, and heat demand meet the preset heat balance conditions, the current parameter values ​​of the thermal storage superheater are determined as the optimal parameter values; wherein, the heat balance conditions are heat release ≥ heat exchange ≥ heat demand, and the parameters of the thermal storage superheater include at least one of the following: the material, shape, characteristic length, mass of the thermal storage body, the number and size of the through holes, and the size of the heat transfer tube.

2. The method according to claim 1, characterized in that, Also includes: If it is determined that the heat release, the heat exchange, and the heat demand do not meet the preset heat balance conditions, the current parameter values ​​of the thermal storage superheater are adjusted, and the step of determining the heat exchange transferred by the heat transfer tube to the steam based on the heat transfer coefficient of the heat transfer tube, the heat exchange area of ​​the outer surface of the heat transfer tube, the first temperature difference at the steam inlet end of the heat transfer tube, and the second temperature difference at the steam outlet end of the heat transfer tube is continued until the heat release, the heat exchange, and the heat demand meet the heat balance conditions.

3. The method according to claim 1, characterized in that, Also includes: The heat release density of the heat storage body is determined based on the real-time temperatures of the heat storage body and the heat transfer tube, as well as the contact thermal resistance between the heat storage body and the heat transfer tube.

4. The method according to claim 1, characterized in that, Also includes: The heat transfer resistance of the tube wall, the heat transfer coefficient outside the tube, the convective heat transfer coefficient inside the tube, and the contact thermal resistance between the heat storage body and the heat transfer tube are obtained. The heat transfer coefficient of the heat transfer tube is determined based on the heat transfer resistance of the tube wall, the heat transfer coefficient outside the tube, the convective heat transfer coefficient inside the tube, and the contact thermal resistance.

5. The method according to claim 3 or 4, characterized in that, The contact thermal resistance is obtained through the following process: The contact thermal resistance is determined based on the gap and contact pressure between the heat storage body and the heat transfer tube, as well as the surface roughness of the heat storage body and the heat transfer tube.

6. The method according to claim 4, characterized in that, The heat transfer resistance of the tube wall is obtained through the following process: The heat transfer resistance of the tube wall is determined based on the length of the heat transfer tube, the inner tube diameter, the outer tube diameter, and the thermal conductivity of the tube material.

7. The method according to claim 4, characterized in that, The convective heat transfer coefficient inside the tube is obtained through the following process: The convective heat transfer coefficient inside the tube is determined based on the steam density, the steam velocity inside the heat transfer tube, the inner tube diameter, the steam dynamic viscosity, the fluid thermal conductivity, and parameters related to the flow channel structure.

8. The method according to claim 1, characterized in that, The mass of the thermal storage body is greater than or equal to a first value, which is obtained through the following process: The first value is determined based on the heat demand, the preset heat loss coefficient, the specific heat capacity of the heat storage body, the highest operating temperature, and the lowest operating temperature.

9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 8.

Images