Molten salt component determination method and device, storage medium and electronic equipment

Abstract

The invention relates to a molten salt component determination method and device, a storage medium and electronic equipment, and relates to the technical field of molten salt energy storage. Analyzing phase diagrams of different fused salt systems to determine a fused salt material matched with the operation parameters; evaluating the stability of the molten salt material according to the thermophysical performance parameters of the molten salt material; and then determining target molten salt components based on the stability evaluation result of the molten salt material. According to the technical scheme, the operation parameters of the thermal power generating unit are obtained, phase diagram analysis of the fused salt system is combined, the fused salt material matched with the operation parameters is determined, then the thermophysical performance parameters of the fused salt material are evaluated, the fused salt material with high stability is screened out, the target fused salt component is further determined, and the target fused salt component is obtained. Requirements of operation parameters of the thermal power generating unit are met, and then the application effect of the fused salt energy storage technology of the thermal power generating unit is effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of energy storage for thermal power units, and particularly to a method, device, storage medium, and electronic device for determining the composition of molten salt. Background Art

[0002] As an important energy supply method, thermal power units play an important role in the energy system. However, the operating efficiency and flexibility of thermal power units are restricted by various factors, one of which is the lack of effective energy storage technology. Molten salt energy storage, as an efficient thermal energy storage method, has the advantages of high energy storage density, low cost, and long lifespan, and thus has broad application prospects in thermal power units.

[0003] However, the current method for determining the composition of molten salt in thermal power units is not perfect enough to fully meet the requirements of the operating parameters of thermal power units, which restricts the application of molten salt energy storage technology in thermal power units. Summary of the Invention

[0004] In view of this, this application provides a method, device, storage medium, and electronic device for determining the composition of molten salt, mainly aiming to improve the technical problem that the current method for determining the composition of molten salt in thermal power units in the existing technology is not perfect enough to fully meet the requirements of the operating parameters of thermal power units.

[0005] In a first aspect, this application provides a method for determining the composition of molten salt, including:

[0006] Obtain the operating parameters of the thermal power unit;

[0007] By analyzing the phase diagrams of different molten salt systems, determine the molten salt materials that match the operating parameters;

[0008] Evaluate the stability of the molten salt materials according to the thermophysical property parameters of the molten salt materials;

[0009] Based on the stability evaluation results of the molten salt materials, determine the target molten salt composition.

[0010] Optionally, the operating parameters include the steam temperature of the thermal power unit;

[0011] The step of determining the molten salt materials that match the operating parameters by analyzing the phase diagrams of different molten salt systems includes:

[0012] By analyzing the phase diagrams of different molten salt systems, determine the melting points and freezing points of different molten salt systems;

[0013] According to the range of the steam temperature, select the molten salt materials whose melting points and freezing points match the range of the steam temperature.

[0014] Optionally, evaluating the stability of the molten salt material according to the thermophysical property parameters of the molten salt material includes:

[0015] Measuring the thermogravimetric analysis curve and differential scanning calorimetry curve of the molten salt material using a synchronous analyzer;

[0016] Determining the thermophysical property parameters of the molten salt material according to the thermogravimetric analysis curve and the differential scanning calorimetry curve;

[0017] Comprehensively evaluating the stability of the molten salt material according to the thermophysical property parameters and the viscosity coefficient and thermal conductivity of the molten salt material.

[0018] Optionally, determining the target molten salt composition based on the stability evaluation result of the molten salt material includes:

[0019] Screening out the molten salt materials with stability higher than the threshold according to the stability evaluation result of the molten salt material;

[0020] Determining the target molten salt composition by verifying the screened molten salt materials.

[0021] Optionally, determining the target molten salt composition by verifying the screened molten salt materials includes:

[0022] Experimentally verifying the screened molten salt materials to determine the actual performance of the molten salt materials under the operating conditions of a thermal power unit;

[0023] Determining the target molten salt composition according to the experimental verification result.

[0024] Optionally, after determining the target molten salt composition based on the stability evaluation result of the molten salt material, the method further includes:

[0025] Analyzing the influence law of the nanomaterial on the target molten salt composition based on the properties of the nanomaterial;

[0026] Adjusting the target molten salt composition according to the influence law of the nanomaterial on the target molten salt composition.

[0027] Optionally, the method further includes:

[0028] Performing thermophysical property tests on the target molten salt composition to analyze the variation law of the thermophysical property parameters of the target molten salt composition with temperature and time and the performance influence mechanism;

[0029] Adjusting the target molten salt composition according to the thermophysical property test result.

[0030] In a second aspect, the present application provides a device for determining a molten salt composition, including:

[0031] An acquisition module, configured to acquire the operating parameters of a thermal power unit;

[0032] An analysis module, configured to determine a molten salt material matching the operating parameters by analyzing the phase diagrams of different molten salt systems;

[0033] An evaluation module, configured to evaluate the stability of the molten salt material according to the thermophysical property parameters of the molten salt material;

[0034] A determination module, configured to determine a target molten salt composition based on the stability evaluation result of the molten salt material.

[0035] In a third aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method described in the first aspect is implemented.

[0036] In a fourth aspect, the present application provides an electronic device, including a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, and when the processor executes the computer program, the method described in the first aspect is implemented.

[0037] By means of the above technical solution, a method, device, storage medium and electronic device for determining a molten salt composition provided by the present application, specifically, first acquire the operating parameters of a thermal power unit; then determine a molten salt material matching the operating parameters by analyzing the phase diagrams of different molten salt systems; evaluate the stability of the molten salt material according to the thermophysical property parameters of the molten salt material; and then determine a target molten salt composition based on the stability evaluation result of the molten salt material. Compared with the current existing technologies, by applying the technical solution of the present application, by acquiring the operating parameters of a thermal power unit and combining with the phase diagram analysis of the molten salt system, a molten salt material matching the operating parameters is determined, and then by evaluating the thermophysical property parameters of the molten salt material, a molten salt material with high stability is screened out, and the target molten salt composition is further determined, which meets the requirements of the operating parameters of the thermal power unit, and further effectively improves the application effect of the molten salt energy storage technology of the thermal power unit.

[0038] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the embodiments of the present application. Description of the Drawings

[0039] The drawings here are incorporated into the specification and constitute a part of this specification, showing the embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0040] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0041] Figure 1 The flowchart shows a method for determining the composition of molten salt provided by an embodiment of the present application;

[0042] Figure 2 The flowchart shows another method for determining the composition of molten salt provided by an embodiment of the present application;

[0043] Figure 3 The structural diagram shows a device for determining the composition of molten salt provided by an embodiment of the present application. Detailed implementation manners

[0044] In order to more clearly understand the above objects, features and advantages of the present application, the following will further describe the solutions of the present application. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0045] In order to improve the technical problem that the method for determining the composition of molten salt in existing thermal power units is imperfect and cannot fully meet the requirements of the operating parameters of thermal power units. This embodiment provides a method for determining the composition of molten salt, as Figure 1 shown, the method includes:

[0046] Step 101, obtain the operating parameters of the thermal power unit.

[0047] In some examples, the operating parameters of the thermal power unit may include: parameters such as the temperature, pressure and thermal properties of the boiler outlet, reheated steam, and extraction steam from high and medium pressure cylinders of the thermal power unit. These parameters are the basis for determining the molten salt heat storage material, ensuring that the molten salt material can work stably under the actual operating conditions of the thermal power unit.

[0048] Exemplarily, appropriate sensors can be installed at key positions of the thermal power unit, such as the boiler outlet, reheated steam pipeline, and extraction steam port of high and medium pressure cylinders. These sensors are used to measure physical quantities such as temperature and pressure.

[0049] Step 102, determine the molten salt material matching the operating parameters by analyzing the phase diagrams of different molten salt systems.

[0050] Exemplarily, based on the phase diagram theory, analyzing the melting point and freezing point of different molten salt systems and selecting molten salt materials that match the steam temperature range of thermal power units can help screen out molten salt systems with appropriate melting points and freezing points within the operating temperature range of thermal power units, thereby avoiding problems such as crystallization or thermal decomposition of molten salts during operation.

[0051] Step 103: Evaluate the stability of the molten salt material according to the thermophysical property parameters of the molten salt material.

[0052] For example, a synchronous analyzer can be used to measure the thermogravimetric analysis curve and differential scanning calorimetry curve of the molten salt material, and combined with the viscosity coefficient and thermal conductivity, a comprehensive evaluation of the stability of the molten salt material can be carried out.

[0053] Through the measurement of the above thermophysical property parameters, the thermal stability, heat absorption and release characteristics, and rheological properties of the molten salt material under high-temperature conditions can be comprehensively understood, providing a scientific basis for the screening of molten salt materials.

[0054] Step 104: Determine the target molten salt composition based on the stability evaluation results of the molten salt material.

[0055] Exemplarily, according to the stability evaluation results, molten salt materials with stability higher than the threshold can be screened out, and their actual performance under the operating conditions of thermal power units can be verified through experiments, and finally the target molten salt composition can be determined.

[0056] In some examples, experimental verification is a key step to ensure the reliability of molten salt materials in practical applications. By simulating the actual operating environment of thermal power units, the long-term stability and performance of molten salt materials can be verified.

[0057] Compared with the prior art, in this embodiment, the operating parameters of the thermal power unit are first obtained; then, by analyzing the phase diagrams of different molten salt systems, the molten salt materials that match the operating parameters are determined; according to the thermophysical property parameters of the molten salt materials, the stability of the molten salt materials is evaluated; and then, based on the stability evaluation results of the molten salt materials, the target molten salt composition is determined. Compared with the current prior art, in this embodiment, by obtaining the operating parameters of the thermal power unit and combining the phase diagram analysis of the molten salt system, the molten salt materials that match the operating parameters are determined, and then by evaluating the thermophysical property parameters of the molten salt materials, the molten salt materials with high stability are screened out, and the target molten salt composition is further determined, meeting the requirements of the operating parameters of the thermal power unit, and thus effectively improving the application effect of the molten salt energy storage technology of the thermal power unit.

[0058] Further, as a refinement and extension of the above embodiment, in order to fully illustrate the specific implementation process of the method in this embodiment, this embodiment provides the following Figure 2 shown specific method, which includes:

[0059] Step 201: Obtain the operating parameters of the thermal power unit.

[0060] For example, from the sensors at the boiler outlet, reheater steam pipeline, extraction ports of high and intermediate pressure cylinders, etc. of the thermal power unit, use a data acquisition system to collect the real-time data provided by the sensors, and obtain that the steam temperature at the boiler outlet is 540 °C, the reheater steam temperature is 560 °C, and the extraction steam temperature of the high and intermediate pressure cylinders is 350 °C.

[0061] Step 202: Determine the molten salt material that matches the operating parameters by analyzing the phase diagrams of different molten salt systems.

[0062] Exemplarily, use existing phase diagrams or draw new phase diagrams through experiments to understand the behavior of the molten salt system at different temperatures and composition ratios. It is necessary to ensure that the selected molten salt remains liquid within its operating temperature range and avoid the occurrence of unstable phases or phase separation under operating conditions, which may lead to equipment corrosion or blockage.

[0063] In some examples, based on phase diagram theory and previous experimental experience, low-cost and high-performance molten salt thermal energy storage materials that match different steam temperatures can be determined. Selecting mixtures with lower eutectic points can reduce the operating temperature requirements and improve system efficiency.

[0064] Optionally, the operating parameters include the steam temperature of the thermal power unit; correspondingly, step 202 may specifically include: by analyzing the phase diagrams of different molten salt systems, determine the melting point and freezing point of different molten salt systems; according to the range of steam temperature, select a molten salt material whose melting point and freezing point match the range of steam temperature.

[0065] Exemplarily, by analyzing the phase diagrams of different molten salt systems, determine the melting point and freezing point of different molten salt systems. The steam temperature range in the thermal power unit or application may be between 400 °C and 600 °C. The molten salt system is usually composed of two or more salts mixed to form a eutectic mixture, such as nitrates, carbonates, chlorides, etc. By looking up the phase diagrams of the molten salt systems and understanding their melting points (liquidus) and freezing points (solidus), the changes in melting points and freezing points at different composition ratios can be obtained. Then, according to the steam temperature range, select a molten salt material whose melting point and freezing point match the operating parameters of the thermal power unit. For example, select a nitrate mixture with a melting point of about 142 °C as the molten salt material. After selecting the molten salt material, it is also necessary to further evaluate its thermal stability, heat capacity, thermal conductivity, and chemical stability, etc., to ensure that they can operate stably for a long time under the specified operating conditions.

[0066] Step 203: Use a synchronous analyzer to measure the thermogravimetric analysis curve and differential scanning calorimetry curve of the molten salt material.

[0067] In some examples, the thermogravimetric analysis curve shows the mass change of the sample as the temperature increases. Through the thermogravimetric analysis curve, the weight loss process of the material caused by volatilization, decomposition or other chemical reactions can be observed. The differential scanning calorimetry curve reflects the endothermic or exothermic situation of the sample. Through the differential scanning calorimetry curve, the specific temperatures of thermal events such as melting, crystallization, and glass transition can be identified.

[0068] Exemplarily, by finding the positions of the endothermic peak and exothermic peak on the thermogravimetric analysis curve, the melting point and freezing point of the molten salt can be determined. The stability of the molten salt at different temperatures can be evaluated through the differential scanning calorimetry curve, and its decomposition temperature and decomposition degree can be understood.

[0069] Step 204: Determine the thermophysical property parameters of the molten salt material according to the thermogravimetric analysis curve and the differential scanning calorimetry curve.

[0070] In some examples, a synchronous analyzer is used to measure the thermogravimetric analysis curve and the differential scanning calorimetry curve of the molten salt material to determine its thermophysical property parameters. Through the starting point and ending point of weight loss on the thermogravimetric analysis curve, the temperature range in which the material starts to decompose and is completely decomposed is determined. A higher starting weight loss temperature usually means better thermal stability. The thermal stability of the material at different temperatures can also be evaluated according to the weight loss amount of the thermogravimetric analysis curve. A smaller weight loss amount indicates better thermal stability of the material.

[0071] Exemplarily, find the positions of the endothermic peak and exothermic peak on the differential scanning calorimetry curve. These temperatures are the melting point and freezing point of the molten salt material. According to the measured heat flow change and mass of the molten salt material, combined with the heating rate, the specific heat capacity of the molten salt material is calculated.

[0072] Step 205: Comprehensively evaluate the stability of the molten salt material according to the thermophysical property parameters, the viscosity coefficient and the thermal conductivity of the molten salt material.

[0073] Exemplarily, by combining the viscosity coefficient and the thermal conductivity of the molten salt material, its stability is comprehensively evaluated. Based on the initially screened candidate molten salt systems, a synchronous analyzer, a viscosity coefficient tester, a thermal conductivity analyzer, etc. can be used to measure the thermal physical properties of the molten salt material and select high-performance molten salt materials, and further evaluate their thermal physical properties (such as density, viscosity, specific heat, thermal conductivity) and chemical stability to ensure that they can operate stably for a long time under the specified operating conditions.

[0074] In some examples, the viscosity of the molten salt affects its fluidity and heat transfer efficiency, and a lower viscosity helps to improve the heat transfer efficiency. The thermal conductivity determines the ability of the material to conduct heat, and a higher thermal conductivity means better heat transfer performance. Different weights are assigned according to the importance of various thermophysical property parameters. By comparing the property parameters of different molten salt materials, other factors in practical applications, such as cost, corrosiveness, environmental impact, etc., can also be considered to comprehensively evaluate the stability of the molten salt materials.

[0075] For example, through experiments, the thermal decomposition temperature of this molten salt material is measured to be 600 °C, the viscosity coefficient is 0.1 Pa·s, and the thermal conductivity is 0.5 W / (m·K).

[0076] Step 206: Determine the target molten salt composition based on the stability evaluation result of the molten salt material.

[0077] In some examples, based on the thermophysical property parameters of the molten salt material, the viscosity coefficient, thermal conductivity and other parameters of the molten salt material, the cost of different molten salt materials can also be considered to select the material with the highest cost performance. Different molten salt materials have different corrosiveness to the equipment materials. Selecting materials with lower corrosiveness can extend the service life of the equipment and reduce the maintenance cost. The corrosiveness can also be evaluated through the historical database or by conducting laboratory tests.

[0078] Optionally, step 206 may specifically include: screening out the molten salt materials with stability higher than the threshold according to the stability evaluation result of the molten salt material; verifying the screened molten salt materials to determine the target molten salt composition.

[0079] In some examples, the molten salt materials with stability higher than the threshold can be screened out according to the stability evaluation result. Conduct experimental verification on this molten salt material to determine its actual performance under the operating conditions of the thermal power unit. For example, the final determined target molten salt composition is: 60% potassium nitrate, 30% sodium nitrite and 10% sodium nitrate.

[0080] Optionally, the above-mentioned verifying the screened molten salt materials to determine the target molten salt composition may specifically include: conducting experimental verification on the screened molten salt materials to determine the actual performance of the molten salt material under the operating conditions of the thermal power unit; determining the target molten salt composition according to the experimental verification result.

[0081] In some examples, in order to ensure that the selected molten salt material actually meets the expectations, experimental verification can be carried out on the screened molten salt materials, including but not limited to thermal stability tests, thermal cycle tests and long-term operation tests under simulated thermal power unit operating conditions to determine the actual performance of the molten salt material.

[0082] For example, through thermogravimetric analysis and differential scanning calorimetry experiments, it is confirmed that the actual thermal properties of the material are consistent with the theoretical values. Long-term operation tests can also be carried out under actual operating conditions to observe the stability and performance changes of the material, and the selected molten salt material can be contacted with common equipment materials to evaluate its corrosiveness, and the heat transfer efficiency of the molten salt material can be tested in a simulated environment to ensure that it can meet the actual application requirements, so as to systematically determine the target molten salt composition and ensure its reliability and effectiveness in actual applications.

[0083] Optionally, the method of this embodiment specifically further includes: analyzing the influence law of the nanomaterial on the target molten salt composition based on the properties of the nanomaterial; adjusting the target molten salt composition according to the influence law of the nanomaterial on the target molten salt composition.

[0084] In some examples, the properties of the nanomaterial can include the type, shape, proportion, and preparation method of the nanomaterial, etc. Analyze the influence laws of the type, shape, proportion, and preparation method of the nanomaterial on the properties such as the thermal conductivity, viscosity, and thermal stability of the target molten salt composition, and explore the variation laws of its thermophysical parameters with temperature and time. The addition of the nanomaterial can significantly improve the properties such as the thermal conductivity and viscosity of the molten salt. By optimizing the properties of the nanomaterial, the performance of the molten salt composite heat storage material can be further improved.

[0085] In the embodiments of the present disclosure, while ensuring the high performance of the molten salt material, the preparation cost of the material is reduced by optimizing the proportion of the molten salt system and the nanomaterial. At the same time, the developed molten salt material and system design fully consider the actual operating conditions of thermal power units, and have good practicability and economy.

[0086] Optionally, the method of this embodiment specifically further includes: performing thermophysical property tests on the target molten salt composition, analyzing the variation laws of the thermophysical parameters of the target molten salt composition with temperature and time and the performance influence mechanism; adjusting the target molten salt composition according to the thermophysical property test results.

[0087] Exemplarily, perform thermophysical property tests on the target molten salt composition, analyze the variation laws of its thermophysical parameters with temperature and time, and adjust the molten salt composition according to the test results. This process helps to optimize the performance of the molten salt material and ensure that it always maintains high-efficiency and stable energy storage capabilities during the operation of thermal power units.

[0088] In some examples, by analyzing the influence laws of factors such as the type, shape, proportion, and preparation method of the nanomaterial on the stability of the low-cost and high-performance molten salt composite material, exploring the variation laws of its thermophysical parameters with temperature and time and the performance influence mechanism, a series of low-cost and high-performance molten salt composite heat storage materials can be determined.

[0089] Compared with the current existing technologies, based on the theoretical basis of heat transfer, fluid mechanics, and thermodynamics, this embodiment deeply studies the flow, heat transfer, and heat storage characteristics inside the key components, providing a solid theoretical support for the optimal design of molten salt materials. At the same time, through experimental verification, the reliability and efficiency of the determined molten salt materials under the actual operating conditions of thermal power units are ensured, and a molten salt composite heat storage material with low cost, low melting point, and high heat storage density is successfully obtained, meeting the requirements of the operating parameters of thermal power units, and thus effectively improving the application effect of the molten salt energy storage technology for thermal power units. The method of this embodiment is scientific, practical, and innovative, can effectively improve the application effect of the molten salt energy storage technology for thermal power units, and has broad application prospects.

[0090] Further, as Figure 1 a specific implementation of the method shown, this embodiment provides a device for determining the composition of molten salt, as Figure 3 shown, the device includes: an acquisition module 31, an analysis module 32, an evaluation module 33, and a determination module 34.

[0091] The acquisition module 31 is configured to acquire the operating parameters of the thermal power unit;

[0092] The analysis module 32 is configured to determine the molten salt materials matching the operating parameters by analyzing the phase diagrams of different molten salt systems;

[0093] The evaluation module 33 is configured to evaluate the stability of the molten salt materials according to the thermophysical property parameters of the molten salt materials;

[0094] The determination module 34 is configured to determine the target molten salt composition based on the stability evaluation result of the molten salt materials.

[0095] In some examples, the operating parameters include the steam temperature of the thermal power unit; correspondingly, the analysis module 32 is specifically configured to determine the melting point and solidification point of different molten salt systems by analyzing the phase diagrams of different molten salt systems; and select the molten salt materials whose melting point and solidification point match the range of the steam temperature according to the range of the steam temperature.

[0096] In some examples, the evaluation module 33 is specifically configured to measure the thermogravimetric analysis curve and differential scanning calorimetry curve of the molten salt materials using a synchronous analyzer; determine the thermophysical property parameters of the molten salt materials according to the thermogravimetric analysis curve and the differential scanning calorimetry curve; and comprehensively evaluate the stability of the molten salt materials according to the thermophysical property parameters and the viscosity coefficient and thermal conductivity of the molten salt materials.

[0097] In some examples, the determination module 34 is specifically configured to screen out molten salt materials with stability higher than a threshold according to the evaluation results of the stability of the molten salt materials; by verifying the screened molten salt materials, the target molten salt composition is determined.

[0098] In some examples, the determination module 34 is further specifically configured to conduct experimental verification on the screened molten salt materials to determine the actual performance of the molten salt materials under the operating conditions of a thermal power unit; according to the experimental verification results, the target molten salt composition is determined.

[0099] In some examples, the determination module 34 is further specifically configured to analyze the influence law of the nanomaterials on the target molten salt composition based on the properties of the nanomaterials; according to the influence law of the nanomaterials on the target molten salt composition, the target molten salt composition is adjusted.

[0100] In some examples, the determination module 34 is further specifically configured to conduct thermophysical property tests on the target molten salt composition to analyze the variation law of the thermophysical parameters of the target molten salt composition with temperature and time and the performance influence mechanism; according to the thermophysical property test results, the target molten salt composition is adjusted.

[0101] Based on the above as Figure 1 and Figure 2 shown in the method, correspondingly, this embodiment further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the above as Figure 1 and Figure 2 shown in the method is implemented.

[0102] Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product, and the software product can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of various implementation scenarios of the present application.

[0103] Based on the above as Figure 1 and Figure 2 shown in the method, and Figure 3 shown in the virtual device embodiment, for the purpose of achieving the above object, this embodiment of the present application further provides an electronic device, which may include a storage medium and a processor; the storage medium is used to store a computer program; the processor is used to execute the computer program to implement the above as Figure 1 and Figure 2 shown in the method.

[0104] Optionally, the above-mentioned physical device may further include a user interface, a network interface, a camera, a radio frequency (RF) circuit, sensors, an audio circuit, a WI-FI module, etc. The user interface may include a display screen (Display), an input unit such as a keyboard (Keyboard), etc. Optionally, the user interface may further include a USB interface, a card reader interface, etc. The network interface may optionally include a standard wired interface, a wireless interface (such as a WI-FI interface), etc.

[0105] Those skilled in the art can understand that the above-mentioned physical device structure provided in this embodiment does not constitute a limitation on the physical device, and may include more or fewer components, or combine some components, or arrange different components.

[0106] The storage medium may further include an operating system and a network communication module. The operating system is a program for managing the hardware and software resources of the above-mentioned physical device, and supports the operation of information processing programs and other software and / or programs. The network communication module is used to implement communication between components inside the storage medium, as well as communication between other hardware and software in the information processing physical device.

[0107] Through the description of the above embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus a necessary general hardware platform, or can also be implemented by hardware. By applying the solution of this embodiment, by obtaining the operating parameters of the thermal power unit and combining with the phase diagram analysis of the molten salt system, the molten salt material matching the operating parameters is determined, and then by evaluating the thermophysical property parameters of the molten salt material, the molten salt material with high stability is screened out, and the target molten salt composition is further determined, meeting the requirements of the operating parameters of the thermal power unit. The method and device of this embodiment not only focus on the research and development of molten salt materials, but also are committed to the integration and demonstration of the system. By developing and testing key components such as high-pressure steam-molten salt heat exchangers and molten salt-water / steam heat release heat exchangers, the heat extraction and heat release peak shaving scheme is optimized. Finally, an 80MWh-class high-temperature steam molten salt thermal energy storage demonstration system is built, successfully verifying the feasibility of the key technologies and the overall performance of the system. The construction of this demonstration system provides an important reference basis for the popularization and application of the molten salt energy storage technology for thermal power units.

[0108] It should be noted that in this document, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0109] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for determining the composition of molten salt, characterized in that: include: Obtain the operating parameters of thermal power units; Determining a molten salt material that matches the operating parameters by analyzing phase diagrams of different molten salt systems; evaluating the stability of the molten salt material according to the thermophysical performance parameters of the molten salt material; Based on the stability evaluation result of the molten salt material, a target molten salt composition is determined.

2. The method according to claim 1, characterized in that: The operating parameters include the steam temperature of the thermal power unit; The step of analyzing phase diagrams of different molten salt systems to determine a molten salt material that matches the operating parameters comprises: By analyzing the phase diagrams of different molten salt systems, the melting points and solidification points of different molten salt systems can be determined; According to the range of the steam temperature, a molten salt material is selected whose melting point and freezing point match the range of the steam temperature.

3. The method according to claim 1, characterized in that The step of evaluating the stability of the molten salt material according to the thermophysical performance parameters of the molten salt material comprises: Using a synchronous analyzer to measure a thermogravimetric analysis curve and a differential scanning calorimetry curve of the molten salt material; Determining the thermophysical property parameters of the molten salt material according to the thermogravimetric analysis curve and the differential scanning calorimetry curve; The stability of the molten salt material is comprehensively evaluated based on the thermophysical performance parameters and the viscosity coefficient and thermal conductivity coefficient of the molten salt material.

4. The method according to claim 1, characterized in that The step of determining a target molten salt composition based on a stability evaluation result of the molten salt material comprises: According to the stability evaluation result of the molten salt material, screening out the molten salt material with stability higher than a threshold value; The target molten salt composition is determined by verifying the screened molten salt material.

5. The method according to claim 4, characterized in that The method of verifying the screened molten salt material to determine the target molten salt composition includes: Conducting experimental verification on the selected molten salt materials to determine the actual performance of the molten salt materials under the operating conditions of the thermal power unit; According to the experimental verification results, the target molten salt composition is determined.

6. The method according to claim 1, characterized in that After determining the target molten salt composition based on the stability evaluation result of the molten salt material, the method further includes: Based on the properties of the nanomaterials, analyzing the influence of the nanomaterials on the target molten salt composition; According to the influence of the nano material on the target molten salt composition, the target molten salt composition is adjusted.

7. The method according to claim 1, characterized in that The method further comprises: Conducting a thermophysical property test on the target molten salt component to analyze the variation law of the thermophysical property parameters of the target molten salt component with temperature and time and the performance influencing mechanism; According to the test results of the thermophysical properties, the target molten salt composition is adjusted.

8. A device for determining the composition of molten salt, characterized in that: include: An acquisition module is configured to acquire operating parameters of the thermal power unit; An analysis module, configured to determine a molten salt material matching the operating parameters by analyzing phase diagrams of different molten salt systems; An evaluation module, configured to evaluate the stability of the molten salt material according to the thermophysical performance parameters of the molten salt material; The determination module is configured to determine a target molten salt composition based on a stability evaluation result of the molten salt material.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

10. An electronic device comprising a storage medium, a processor, and a computer program stored in the storage medium and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

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