Phase change heat storage optimization control method and system

Abstract

The present invention relates to the field of phase change heat storage optimization and control, and in particular to a phase change heat storage optimization and control method and system, comprising: monitoring first data of a first object; judging the working state of the first object according to changes in the first data; performing calculations, and judging whether the working state is terminated according to the calculation results; adding multiple temperature measuring points in a phase change heat storage tank to achieve real-time monitoring of temperature changes; the system judges the state of the phase change material according to different temperature measuring point values, and optimizes the heat storage and heat release processes; in particular, during the heat storage process, accurately judging when to stop heat storage by analyzing the average values ​​of the second and fourth rows of temperature measuring points; during the heat release process, efficient heat release management is achieved by analyzing the temperature changes of the fourth and second rows.

Description

Technical Field

[0001] The present invention relates to the field of phase change heat storage optimization and regulation, and in particular to a phase change heat storage optimization and regulation method and system. Background Art

[0002] Phase change thermal storage technology is an efficient way to store thermal energy. It uses phase change materials (PCM) to absorb or release a large amount of heat during the phase change process. It is widely used in renewable energy systems, building heating, cooling, and cogeneration. Phase change thermal storage systems can store thermal energy during peak loads and release it during peak demand periods, thereby improving energy efficiency.

[0003] The temperature control of existing phase change thermal storage systems often relies on complex mechanical and electronic control devices, which increases the complexity and maintenance cost of the system. At the same time, the hysteresis of temperature control may lead to energy waste or shortage.

[0004] The existing phase change heat storage system lacks an intelligent control mechanism in the use of heat pipes and cannot be dynamically adjusted according to actual load demand, resulting in the system's energy efficiency not being fully utilized.

[0005] Therefore, in view of the above-mentioned deficiencies in the prior art, the present invention proposes a phase change heat storage optimization and control system and method to solve the defects of low heat conduction efficiency and complex temperature control in the prior art, and to improve the overall performance and application flexibility of the phase change heat storage system. Summary of the invention

[0006] In view of the above problems existing in the prior art, the present invention is proposed.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a phase change heat storage optimization and control method, comprising: monitoring first data of a first object; judging the working state of the first object according to changes in the first data; performing calculations, and judging whether the working state is terminated according to the calculation results.

[0008] As a preferred solution of the phase change heat storage optimization and control method described in the present invention, wherein: the crawling data to obtain the first text includes crawling data through a first framework, selecting high-confidence texts from the crawled data for preliminary screening to obtain the first text.

[0009] As a preferred solution of the phase change heat storage optimization control method of the present invention, wherein: the judging the working state of the first object includes, if the temperature of the measuring point rises as a whole and reaches a preset threshold, it is judged as a heat storage process, and the upper heat storage material undergoes a phase change;

[0010] If the temperature of the measuring point decreases as a whole and drops to the preset threshold, it is judged as a heat release process and a phase change occurs in the lower layer of heat storage material.

[0011] As a preferred embodiment of the phase change heat storage optimization and control method of the present invention, the phase change includes that when heat is stored, the heat exchange medium flows into the heat storage tube from bottom to top, and the upper heat storage material undergoes a phase change from solid phase to liquid phase;

[0012] When releasing heat, the heat exchange medium flows into the heat storage tube from top to bottom, and the lower layer of heat storage material undergoes a phase change from liquid phase to solid phase.

[0013] As a preferred solution of the phase change heat storage optimization and control method described in the present invention, the calculation includes calculating the average temperature of the measuring points and judging the average. If the average temperature of the measuring points exceeds or is lower than the preset threshold, the temperature measuring device is checked, and it is judged as a local problem or an overall problem in combination with the temperature of the measuring points, and the abnormal data is corrected according to the adjustment strategy.

[0014] As a preferred solution of the phase change heat storage optimization control method of the present invention, wherein: the correction of abnormal data according to the adjustment strategy includes, if the local temperature of the heat storage material is high, when in the heat storage process, changing the distribution of the heat source input, and preferentially supplying heat to the area with low temperature;

[0015] When in the heat release process, the energy distribution in the phase change area is adjusted by changing the flow direction of the heat exchange medium;

[0016] If the overall temperature of the heat storage material is high, when it is in the heat storage process, the equipment will stop storing heat and start the cooling device;

[0017] When in the heat release process, stop the heat release operation, adjust the equipment load demand, and check the heat storage material;

[0018] If the average temperature of the measuring point is lower than the preset threshold, and if the local temperature of the heat storage material is low, when in the heat storage process, the heat energy input is increased to optimize the phase change efficiency of the material;

[0019] When in the heat release process, check the load demand. If the load exceeds the heat release capacity of the material, reduce the output power.

[0020] If the unreleased heat of the heat storage material can still meet the demand, adjust the load distribution strategy to prioritize the heat supply of key equipment;

[0021] If the heat release material has residual heat, the heat transfer efficiency of the heat exchange medium is optimized to extend the heat release time;

[0022] If the overall temperature of the heat storage material is low, check the insulation layer and optimize the heat transfer path during the heat storage process;

[0023] When in the heat release process, if the heat storage material is not completely consumed, the load requirement of the heat release device is adjusted to reduce the heat output rate;

[0024] If the heat storage material has been exhausted, the heat source is started to heat the heat storage material until the temperature at the measuring point reaches a preset threshold;

[0025] If the abnormal data is within the preset range after correction, it is used as the calculation result;

[0026] If the abnormal data is not within the preset range after correction, it will not be used as the calculation result.

[0027] As a preferred solution of the phase change heat storage optimization control method of the present invention, wherein: the judging whether the working state is ended according to the calculation results includes that when heat is stored, when the average value of the second row of temperature measurement points is greater than the phase change point of the heat storage material and the average value of the fourth row of temperature measurement points is greater than or equal to the phase change point of the heat storage material, the heat storage stops;

[0028] When releasing heat, when the average value of the fourth row of temperature measuring points is less than the phase change point of the heat storage material and the average value of the second row of temperature measuring points is less than or equal to the phase change point of the heat storage material, it means that the heat release can be stopped.

[0029] As a preferred solution of the phase change heat storage optimization control method of the present invention, a phase change heat storage optimization control system includes: a detection data module, a state judgment module and a calculation module;

[0030] The detection data module monitors first data of the first object;

[0031] The state judgment module judges the working state of the first object according to the change of the first data;

[0032] The calculation module performs calculations and determines whether the working state is terminated according to the calculation results.

[0033] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and is characterized in that when the processor executes the computer program, the steps of the phase change heat storage optimization control method as described above are implemented.

[0034] A computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of a phase change heat storage optimization control method as described above are implemented. Beneficial effects of the invention: Temperature monitoring system: The system adds multiple temperature measurement points in the phase change heat storage tank to achieve real-time monitoring of temperature changes. Through the arrangement of 5 rows and 5 columns, a systematic temperature monitoring network is formed, which effectively improves the accuracy and range of temperature acquisition.

[0035] Dynamic control strategy: The system determines the state of the phase change material based on different temperature measurement point values ​​and optimizes the heat storage and release process. In particular, during the heat storage process, the average value of the temperature measurement points in the second and fourth rows is analyzed to accurately determine when to stop heat storage; during the heat release process, efficient heat release management is achieved by analyzing the temperature changes in the fourth and second rows. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0037] Figure 1 A flow chart of a phase change heat storage optimization control method provided by an embodiment of the present invention.

[0038] Figure 2 A system framework diagram of a phase change heat storage optimization control method provided for an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0040] Example 1, reference Figure 1-Figure 2 , is an embodiment of the present invention, which provides a phase change heat storage optimization control method, comprising:

[0041] S1: monitoring first data of a first object.

[0042] It should be noted that monitoring the first data of the first object includes obtaining the temperature of a measuring point by installing a temperature measuring device on the first object.

[0043] In the embodiment of the present application, the first object is a phase change heat storage tank, and temperature monitoring is achieved by adding a number of temperature measuring points in the phase change storage tank. The positions of the added measuring points are as follows: Figure 2As shown, 5 rows and 5 columns of measuring points are usually added; the measuring points in the first row from left to right are T11, T12, T13, T14, T15, and the measuring points in the nth row are Tn1, Tn2, Tn3, Tn4, Tn5, and so on. Each measuring point uses a high-precision temperature sensor, such as a thermocouple, thermistor or other sensor suitable for high temperature and dynamic environment, to ensure the accuracy and real-time nature of the monitoring data. The installation position of the measuring point is optimized according to the heat conduction characteristics inside the tank and the distribution of the phase change area, and is mainly arranged in the phase change area and areas with large temperature gradients or possible local overheating, such as near the heat source input or around the heat exchange device, to ensure that the temperature change trend can be captured in real time. The temperature measuring device is installed in the inner wall or structure of the tank by a fixed bracket or embedded method to ensure close contact between the sensor and the heat storage material, and a protective sleeve or heat insulation measures are used to avoid external interference.

[0044] In an optional embodiment, the first object can also be used for heat exchanger equipment for heat energy transfer, such as a plate heat exchanger, a shell and tube heat exchanger, or a steam generator. The temperature measuring device can be used to monitor the inlet temperature, outlet temperature of the heat exchange medium and the temperature gradient of the heat exchange area in real time to optimize the heat exchange efficiency. The temperature measurement targets include the inlet temperature, outlet temperature and temperature gradient of the key internal areas of the medium on both sides of the heat exchanger, which are used to evaluate the effect of heat energy transfer and the operating status of the equipment. The selection of the temperature measuring device depends on the ambient temperature range and accuracy requirements, and thermocouples, thermistors, infrared temperature sensors or temperature transmitters can be selected.

[0045] In an embodiment of the present application, the first data is real-time temperature data of the measuring point collected by temperature sensors installed at various measuring points inside the first object (such as a heat storage device or a heat exchanger). Specifically, the first data includes instantaneous temperature values ​​of different measuring points, temperature change trends, and temperature distribution characteristics between the measuring points. By arranging multiple temperature sensors at different positions (such as inlets, outlets, central areas, and edge areas), the system can obtain detailed temperature data in real time, accurately identify areas of local overheating or overcooling, and capture the local temperature and overall temperature distribution of the heat storage material or heat exchange medium, reflecting the dynamic process of heat transfer, storage, and dissipation within the system.

[0046] In the embodiments of the present application, the uses of the first data mainly include: first, to monitor the temperature changes in the heat storage or heat release process in real time to determine whether the system is in normal operation; second, by analyzing the temperature differences at different measuring points, the uniformity of heat distribution is evaluated to identify areas of local overheating, overcooling or poor heat conduction; third, to provide key reference data for the control system, to assist in optimizing the energy input in the heat storage or heat release process, and to correct abnormal data according to the adjustment strategy; fourth, to combine historical data with real-time data analysis to provide a basis for system maintenance and fault diagnosis, and to ensure the efficient operation and long-term stability of the heat storage device.

[0047] In an optional embodiment, the first data can also be obtained by scanning the surface of the heat storage device or the heat exchanger with an infrared thermal imager, and obtaining the temperature distribution image on the surface and inside of the equipment through infrared imaging technology. The system finds that the surface temperature on one side of the device is higher, while the temperature on the other side is lower, indicating that the heat is not evenly conducted.

[0048] In an optional embodiment, the first data can also be obtained through optical fiber temperature sensing technology, by laying optical fibers at different positions of the heat storage device or heat exchanger to obtain temperature data of each measuring point in real time. The optical fiber temperature sensor can obtain temperature information along the axial direction of the optical fiber through the reflection or refraction principle of the optical fiber, thereby realizing distributed temperature monitoring.

[0049] Example 2, reference Figure 2 , is an embodiment of the present invention, which provides a phase change heat storage optimization control method, comprising:

[0050] S2: Determine the working status of the first object according to the change of the first data.

[0051] It should be noted that judging the working state of the first object includes, if the temperature of the measuring point increases as a whole and reaches a preset threshold, it is judged as a heat storage process, and the upper heat storage material undergoes a phase change;

[0052] If the temperature of the measuring point decreases as a whole and drops to the preset threshold, it is judged as a heat release process and a phase change occurs in the lower layer of heat storage material.

[0053] To judge the working state of the first object, it is necessary to combine the overall change trend of the temperature at the measuring point and whether it reaches the preset temperature threshold. Specifically, when the temperature at the measuring point shows a continuous upward trend as a whole and reaches the phase change starting temperature threshold of the heat storage material, the system judges that the first object is in the heat storage process. At this time, the upper heat storage material enters the phase change region and gradually changes from solid to liquid, absorbing heat and realizing energy storage; at the same time, the change characteristics of the temperature at the measuring point (such as the temperature increase rate tends to be flat) can further verify the phase change process. When the temperature at the measuring point shows a continuous downward trend as a whole and drops to the phase change termination temperature threshold of the heat release material, the system judges that the first object is in the heat release process. At this time, the lower heat storage material begins to undergo a phase change, gradually changing from liquid to solid, releasing the stored heat for external use.

[0054] The preset thresholds include the phase change starting temperature of the heat storage process and the phase change termination temperature of the heat release process. For example, if a molten salt with a phase change temperature of 220°C is used as the heat storage medium, the preset threshold of the heat storage process can be set to 215°C to 225°C, and the preset threshold of the heat release process can be set to 210°C to 220°C, so as to accurately capture the start and end of the phase change process. The preset thresholds accurately match the phase change temperature range of the heat storage material to ensure that the system can maximize the use of the phase change latent heat of the heat storage material when operating in the phase change region, thereby improving the energy efficiency of heat storage and heat release; the upper and lower limits of the thresholds are optimized to filter out non-real state changes caused by short-term fluctuations or sensor errors, thereby enhancing the stability of system state judgment; the preferred range of the preset thresholds also combines the safety margin under actual operating conditions to avoid thermal decomposition or performance degradation of the heat storage material when it exceeds the limit temperature, thereby extending the service life of the system. Through the preferred preset thresholds determined based on material properties and system operation requirements, this embodiment can achieve accurate identification of heat storage and heat release processes, providing reliable technical guarantees for efficient and safe operation.

[0055] Furthermore, the phase change occurs when, during heat storage, the heat exchange medium flows into the heat storage tube from bottom to top, and the upper heat storage material undergoes a phase change from a solid phase to a liquid phase;

[0056] When releasing heat, the heat exchange medium flows into the heat storage tube from top to bottom, and the lower layer of heat storage material undergoes a phase change from liquid phase to solid phase.

[0057] When storing heat, the heat exchange medium (such as high-temperature heat transfer oil or steam) flows in from the lower inlet of the heat storage tube, flows from bottom to top in the heat storage tube, fully contacts the heat storage material and transfers heat. At this time, the upper heat storage material first reaches the phase change starting temperature, gradually undergoes phase change, changes from solid phase to liquid phase, and absorbs the heat transferred by the heat exchange medium to achieve thermal energy storage. With the transfer of heat, the phase change gradually extends downward to the middle and lower materials, forming a layered heat storage process. When releasing heat, the heat exchange medium (such as coolant or air) flows in from the upper inlet of the heat storage tube, flows from top to bottom along the heat storage tube, takes away the heat stored in the heat storage material and transfers it to the external load. At this time, the lower heat storage material first cools to the phase change termination temperature, gradually changes from liquid phase to solid phase, and releases latent heat for external use. With the continuous flow of the heat exchange medium, the phase change process extends to the middle and upper materials, and finally completes the heat release. During the heat storage and release process, the precise control of the flow direction of the heat exchange medium and the synergistic effect of the phase change process of the heat storage material enable the system to efficiently utilize the phase change latent heat of the heat storage material, achieve rapid storage and stable release of heat, and ensure the operating efficiency and reliability of the overall system.

[0058] S3: Perform calculations and determine whether the working state is terminated based on the calculation results.

[0059] It should be noted that the calculation includes calculating the average temperature of the measuring points and judging the average. If the average temperature of the measuring points exceeds or is lower than the preset threshold, the temperature measuring device is checked, and the temperature of the measuring points is judged as a local problem or an overall problem, and the abnormal data is corrected according to the adjustment strategy.

[0060] The calculation process includes real-time acquisition of temperature data at each measuring point, mean calculation, abnormality judgment, and abnormality correction. First, the real-time temperature data of each measuring point is obtained through multiple temperature measuring devices arranged in the heat storage device. The method for calculating the mean temperature of the measuring point is to perform weighted or non-weighted average processing on the temperature values ​​of all measuring points to reflect the overall temperature state of the heat storage device. During the calculation process, the system will dynamically update the temperature change trend of each measuring point, while ensuring the accuracy and completeness of data collection.

[0061] After the calculation is completed, the system compares the mean temperature of the measuring point with the preset threshold. If the mean exceeds or falls below the preset threshold, the system will determine whether the current temperature anomaly is a local problem or an overall problem. This judgment is achieved through independent data analysis of each measuring point. For example, if the temperature of some measuring points deviates significantly from the temperature values ​​of the surrounding measuring points, it may be a local problem, such as a failure of the temperature measuring device or uneven heat conduction; if the temperature of all measuring points shows a consistent abnormal trend, it may be an overall problem, such as degradation of the performance of the thermal storage material or abnormal heat source input.

[0062] For the detected abnormal data, the system will take corresponding adjustment strategies to make corrections based on the measuring point temperature and the abnormality type. The calculation and correction process ensures the reliability and effectiveness of the measuring point temperature data, and provides an accurate reference for judging the operating status of the heat storage device and implementing subsequent control strategies. At the same time, the correction of abnormal data and strategy adjustment can respond to sudden problems in system operation in a timely manner, avoiding efficiency loss or equipment damage in the heat storage or release process due to incorrect judgment.

[0063] Furthermore, the correction of abnormal data according to the adjustment strategy includes, if the local temperature of the heat storage material is high, when it is in the heat storage process, changing the distribution of the heat source input, and preferentially supplying heat to the areas with low temperatures; for example, the temperature of the T11 and T12 measuring points exceeds the preset threshold (such as 230°C), while the temperatures of other measuring points (such as T13, T14, and T15) are maintained at around 220°C. At this time, the system dynamically changes the distribution of the heat source input according to the adjustment strategy, directing more heat to areas with lower temperatures (such as the areas where T13 and T14 are located), while reducing the heat energy input to high-temperature areas (T11 and T12). Through this strategy, the heat input in high-temperature areas is reduced, avoiding performance degradation caused by local overheating of the heat storage material, while ensuring that the heat storage efficiency in low-temperature areas is improved, making the phase change process of the material more uniform;

[0064] When in the heat release process, the energy distribution in the phase change area is adjusted by changing the flow direction of the heat exchange medium; for example, the measurement point data shows that the lower layer temperature (such as T41 and T42) is 210°C, which is higher than the lower limit of the phase change temperature (200°C), while the middle and upper areas (such as T31, T32, T21, T22) are lower than 200°C. At this time, according to the adjustment strategy, the system changes the flow direction of the heat exchange medium so that the heat exchange medium flows preferentially from the high temperature area (such as T41 and T42) to the medium and low temperature areas (such as T21 and T22), effectively distributing the local high temperature heat to other areas. After adjustment, the heat utilization efficiency of the heat release process is improved;

[0065] If the overall temperature of the heat storage material is high, when it is in the heat storage process, the equipment will stop storing heat and start the cooling device; according to the adjustment strategy, the system will immediately stop the heat source input, suspend the heat storage operation, and start the cooling device (such as a cooling water circulation system or an air cooling device) to quickly cool down the heat storage material. Through the implementation of the cooling strategy, the overall temperature gradually returns to the normal range (such as around 220°C), ensuring that the heat storage material will not degrade or be damaged due to overheating;

[0066] When in the heat release process, stop the heat release operation, adjust the equipment load demand, and check the heat storage material; for example, if the average value of the measuring point is higher than the safety temperature set during the heat release process (such as 215°C), it indicates that the system heat release efficiency is insufficient. At this time, according to the adjustment strategy, the system stops the heat release operation, re-evaluates the load demand, reduces the load heat output demand, and checks whether the state of the heat storage material is abnormal (such as decomposition or contamination);

[0067] If the average temperature of the measuring point is lower than the preset threshold, and if the local temperature of the heat storage material is low, when in the heat storage process, the heat energy input is increased to optimize the phase change efficiency of the material; for example, the average temperature of the measuring point is lower than the normal working range of heat storage (such as 210°C), and the temperature of the local area (such as T21, T22) is significantly lower than other measuring points, indicating that the local temperature is lower than the starting temperature of the phase change. At this time, according to the adjustment strategy, the system increases the input power of the heat source, supplies more heat to the low-temperature area, and adjusts the heat source transfer path to reduce heat loss. After the adjustment, the temperature in the low-temperature area quickly returned to around 220°C, and the heat storage material successfully entered the phase change state;

[0068] When in the heat release process, check the load demand. If the load exceeds the heat release capacity of the material, reduce the output power.

[0069] If the unreleased heat of the heat storage material can still meet the demand, adjust the load distribution strategy to prioritize the heat supply of key equipment;

[0070] If the heat-releasing material has residual heat, the heat transfer efficiency of the heat exchange medium is optimized and the heat release time is extended; if the average value of the measuring point is lower than the heat release threshold (such as 200°C), but the measuring point data shows that the heat release material is not completely exhausted (such as T41 and T42 are still maintained at 205°C), the system will reduce the output power of the heat exchange device according to the adjustment strategy, and at the same time extend the flow time of the heat exchange medium in the heat storage material to fully release the latent heat of the heat storage material. If the measuring point data shows that the heat release material is close to exhaustion, the heat source is started to moderately heat the heat storage material until the temperature returns to the effective range of heat release (such as 210°C) to ensure that the load demand is met;

[0071] If the overall temperature of the heat storage material is low, when it is in the heat storage process, check the insulation layer and optimize the heat transfer path; for example, if the average value of the measuring point is lower than the normal range of heat storage (such as 215°C), and the temperature of all measuring points is lower than the starting temperature of phase change, the system will check the performance of the insulation layer first according to the adjustment strategy. If it is found that there is a problem of heat loss in the insulation layer, optimize the insulation measures to reduce heat dissipation. At the same time, increase the input power of the heat source to ensure that the heat storage material quickly enters the phase change zone;

[0072] When in the heat release process, if the heat storage material is not completely consumed, the load requirement of the heat release device is adjusted to reduce the heat output rate;

[0073] If the heat storage material has been exhausted, the heat source is started to heat the heat storage material until the temperature of the measuring point reaches the preset threshold; for example, if the average value of the measuring point is lower than the phase change temperature of heat release (such as 190°C), but the measuring point data shows that the heat storage material is not completely exhausted (such as T51 and T52 are 195°C), the system reduces the load demand according to the adjustment strategy and optimizes the output rate of the heat exchange medium to extend the heat release time and ensure that the remaining heat storage material can meet the demand; if the measuring point data shows that the heat storage material has been completely exhausted, the heat source is immediately started to heat the heat storage material until the temperature returns to the effective heat release range (such as 210°C);

[0074] If the abnormal data is within the preset range after correction, it is used as the calculation result;

[0075] If the abnormal data is not within the preset range after correction, it will not be used as the calculation result.

[0076] Furthermore, judging whether the working state is ended according to the calculation results includes that when heat storage occurs, when the average value of the second row of temperature measurement points is greater than the phase transition point of the heat storage material and the average value of the fourth row of temperature measurement points is greater than or equal to the phase transition point of the heat storage material, heat storage stops;

[0077] When releasing heat, when the average value of the fourth row of temperature measuring points is less than the phase change point of the heat storage material and the average value of the second row of temperature measuring points is less than or equal to the phase change point of the heat storage material, it means that the heat release can be stopped.

[0078] By real-time monitoring of the average temperature of key measurement points, it is possible to accurately determine whether the working state is completed. During the heat storage process, the heat exchange medium flows into the heat storage tube from bottom to top. Due to the effect of thermal convection and the density characteristics of the heat storage material, the heat storage material with a higher temperature has a lower density and will naturally rise to the upper part of the heat storage tube, so that the temperature of the upper heat storage material rises first and enters the phase change state (from solid phase to liquid phase) first. Therefore, when the average temperature of the second row of measurement points (such as (T21+T22+T23+T24+T25) / 5) exceeds the phase change point of the heat storage material and the average temperature of the fourth row of measurement points (such as (T41+T42+T43+T44+T45) / 5) reaches or exceeds the phase change point of the heat storage material, it indicates that the phase change process of the heat storage material from bottom to top has been fully completed. At this time, the upper heat storage material has been completely converted into liquid phase. The system determines that the heat storage process can be stopped to avoid further energy input leading to overheating or degradation of material performance.

[0079] During the heat release process, the heat exchange medium flows into the heat storage tube from top to bottom. Due to the influence of thermal convection and temperature gradient, the temperature of the lower layer of heat storage material decreases first and undergoes phase change (from liquid phase to solid phase) first. At this time, the heat exchange medium carries the latent heat released by the heat storage material and gradually transfers it from the lower layer to the middle layer and the upper layer. When the average temperature of the fourth row of measuring points (such as (T41+T42+T43+T44+T45) / 5) is lower than the phase change point of the heat storage material, and the average temperature of the second row of measuring points (such as (T21+T22+T23+T24+T25) / 5) is less than or equal to the phase change point of the heat storage material, it means that the phase change process from top to bottom has been completed, the lower layer of material has been completely solidified and the latent heat has been released, and the system determines that the heat release process can be stopped to avoid unnecessary time or energy waste caused by continued cooling.

[0080] Embodiment 3 is an embodiment of the present invention, which provides a phase change heat storage optimization control system, including: a detection data module, a state judgment module and a calculation module;

[0081] The detection data module monitors first data of the first object;

[0082] The state judgment module judges the working state of the first object according to the change of the first data;

[0083] The calculation module performs calculations and determines whether the working state is terminated according to the calculation results.

[0084] This embodiment further provides a computing device applicable to a phase change heat storage optimization control method, including:

[0085] Memory and processor; the memory is used to store computer executable instructions, and the processor is used to execute computer executable instructions to implement a phase change heat storage optimization and control method proposed in the above embodiment.

[0086] This embodiment also provides a storage medium on which a computer program is stored. When the program is executed by a processor, a phase change heat storage optimization and control method proposed in the above embodiment is implemented.

[0087] The storage medium proposed in this embodiment and the phase change heat storage optimization control method proposed in the above embodiment belong to the same inventive concept. The technical details not fully described in this embodiment can be referred to the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0088] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0089] Logic and / or steps otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch instructions from and execute instructions on, an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0090] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0091] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A phase change heat storage optimization control method, characterized in that: include: monitoring first data of a first object; Determining the working state of the first object according to the change of the first data; Perform calculations and determine whether the working state is completed based on the calculation results.

2. The phase change heat storage optimization control method according to claim 1, characterized in that: The monitoring of the first data of the first object includes obtaining the temperature of a measuring point by installing a temperature measuring device on the first object.

3. The phase change heat storage optimization control method according to claim 2, characterized in that: The determining of the working state of the first object includes: if the temperature of the measuring point increases as a whole and reaches a preset threshold, it is determined to be a heat storage process, and the upper heat storage material undergoes a phase change; If the temperature of the measuring point decreases as a whole and drops to the preset threshold, it is judged as a heat release process and a phase change occurs in the lower layer of heat storage material.

4. The phase change heat storage optimization control method according to claim 3, characterized in that: The phase change includes that when storing heat, the heat exchange medium flows into the heat storage tube from bottom to top, and the upper heat storage material undergoes a phase change from solid phase to liquid phase; When releasing heat, the heat exchange medium flows into the heat storage tube from top to bottom, and the lower layer of heat storage material undergoes a phase change from liquid phase to solid phase.

5. The phase change heat storage optimization control method according to claim 4, characterized in that: The calculation includes calculating the average temperature of the measuring points and judging the average. If the average temperature of the measuring points exceeds or is lower than a preset threshold, the temperature measuring device is checked, and the temperature of the measuring points is judged as a local problem or an overall problem, and the abnormal data is corrected according to the adjustment strategy.

6. The phase change heat storage optimization control method according to claim 5, characterized in that: The correction of abnormal data according to the adjustment strategy includes, if the local temperature of the heat storage material is high, when in the heat storage process, changing the distribution of the heat source input to preferentially supply heat to the area with low temperature; When in the heat release process, the energy distribution in the phase change area is adjusted by changing the flow direction of the heat exchange medium; If the overall temperature of the heat storage material is high, when it is in the heat storage process, the equipment will stop storing heat and start the cooling device; When in the heat release process, stop the heat release operation, adjust the equipment load demand, and check the heat storage material; If the average temperature of the measuring point is lower than the preset threshold, and if the local temperature of the heat storage material is low, when in the heat storage process, the heat energy input is increased to optimize the phase change efficiency of the material; When in the heat release process, check the load demand. If the load exceeds the heat release capacity of the material, reduce the output power. If the unreleased heat of the heat storage material can still meet the demand, adjust the load distribution strategy to prioritize the heat supply of key equipment; If the heat release material has residual heat, the heat transfer efficiency of the heat exchange medium is optimized to extend the heat release time; If the overall temperature of the heat storage material is low, check the insulation layer and optimize the heat transfer path during the heat storage process; When in the heat release process, if the heat storage material is not completely consumed, the load requirement of the heat release device is adjusted to reduce the heat output rate; If the heat storage material has been exhausted, the heat source is started to heat the heat storage material until the temperature at the measuring point reaches a preset threshold; If the abnormal data is within the preset range after correction, it is used as the calculation result; If the abnormal data is not within the preset range after correction, it will not be used as the calculation result.

7. The phase change heat storage optimization control method according to claim 6, characterized in that: The determining whether the working state is ended according to the calculation results includes that when heat storage is in progress, when the average value of the second row of temperature measurement points is greater than the phase transition point of the heat storage material and the average value of the fourth row of temperature measurement points is greater than or equal to the phase transition point of the heat storage material, heat storage stops; When releasing heat, when the average value of the fourth row of temperature measuring points is less than the phase change point of the heat storage material and the average value of the second row of temperature measuring points is less than or equal to the phase change point of the heat storage material, it means that the heat release can be stopped.

8. A system based on a phase change thermal storage optimization control method according to any one of claims 1 to 7, characterized in that: include: Detection data module, state judgment module and calculation module; The detection data module monitors first data of the first object; The state judgment module judges the working state of the first object according to the change of the first data; The calculation module performs calculations and determines whether the working state is terminated according to the calculation results.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of a phase change heat storage optimization control method described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of a phase change heat storage optimization control method described in any one of claims 1 to 7 are implemented.

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