Layered steam phase change heat storage and release management system and method

Abstract

The invention provides a layered steam phase change heat storage and release management system and method, relates to the technical field of heat energy management, and aims to improve the heat storage density and the energy storage efficiency and reduce the heat loss by performing steam heat storage at different temperatures through energy storage devices with divided energy storage areas. Heat is stored through different phase-change materials in each energy storage area, so that the stability of the phase-change materials is improved, the service life of the phase-change materials is prolonged, and the operation and maintenance cost is reduced; the heat storage and release process is dynamically adjusted through supply and demand prediction and intelligent regulation, accurate matching of steam supply and demand is achieved, and the operation efficiency of the system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermal energy management, in particular to a layered steam phase change heat storage and release management system and method. BACKGROUND

[0002] In the prior art, the following defects exist in the heat management of excess high-temperature steam by using a heat storage device with a single phase change material: for example, a single phase change material cannot match steam of different temperature levels, resulting in waste of heat of high-temperature steam and insufficient energy storage density, and the heat storage and release of the heat storage device are determined by the temperature of the phase change material, which cannot realize accurate supply and demand allocation. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a layered steam phase change heat storage and release management system and method to improve energy storage efficiency, reduce heat loss, and realize accurate matching of steam supply and demand.

[0004] In a first aspect, the present application provides a layered steam phase change heat storage and release management system, comprising: An energy storage device, comprising a heat exchanger and an energy storage body, the energy storage body comprising a plurality of energy storage areas, each energy storage area being connected to a heat exchanger; each energy storage area being provided with different phase change materials; A control device connected to the energy storage device, the control device being configured to obtain steam supply data and user demand data of a steam end; determine a supply and demand relationship corresponding to the steam supply data and the user demand data at a future time based on the steam supply data and the user demand data; generate an energy storage instruction based on the supply and demand relationship; control the target heat exchanger corresponding to the steam temperature in the steam supply data of the energy storage instruction to start, so that the steam of the steam end passes through the target heat exchanger and enters the target energy storage area corresponding to the target heat exchanger for heat exchange, until the first heat exchange termination condition is reached, and the target heat exchanger is controlled to stop running.

[0005] Optionally, the control device is further configured to determine the steam supply flow corresponding to the steam supply data at the future time based on the steam supply flow of the steam supply data and the pipe heat loss coefficient; determine the steam demand flow corresponding to the user demand data at the future time based on the steam demand flow of the user demand data and the demand correction coefficient; and determine the supply and demand relationship corresponding to the steam supply data and the user demand data at the future time based on the steam supply flow and the steam demand flow.

[0006] Optionally, the control device is further configured to generate the energy storage instruction when it is determined that the steam supply flow is greater than the steam demand flow.

[0007] Optionally, the energy storage device also includes a circulation pump connected to multiple heat exchangers; a control device is signal-connected to the circulation pump, and the control device is used to generate a heat release command based on the supply and demand relationship; based on the demand temperature in the user demand data in the heat release command, the control device starts the circulation pump so that the heat exchange medium enters the target heat exchanger corresponding to the demand temperature and exchanges heat with the phase change material of the target energy storage area corresponding to the target heat exchanger, until the second heat exchange termination condition is reached, at which point the control device stops the circulation pump.

[0008] Optionally, the control device is also used to obtain the output steam temperature of the energy storage device; and to determine the output flow rate of the circulating pump based on the output steam temperature, the required temperature, the rated flow rate of the circulating pump, and the temperature regulation coefficient.

[0009] Optionally, the first heat exchange termination condition is that the user's steam demand flow rate equals the steam supply flow rate, or the phase change material is in a completely liquid state. The second heat exchange termination condition is that the user's steam demand flow rate is less than the steam supply flow rate, or the phase change material is in a completely solid state.

[0010] Secondly, this application provides a layered steam phase change heat storage and release management method, applicable to the control device in the aforementioned layered steam phase change heat storage and release management system, comprising: Obtain steam supply data and user demand data from the steam source; Based on steam supply data and user demand data, determine the supply and demand relationship corresponding to the steam supply data and user demand data at future moments; Based on supply and demand, energy storage commands are generated; Based on the steam temperature in the steam supply data in the energy storage command, the target heat exchanger corresponding to the steam temperature is controlled to start, so that the steam at the steam end enters the target energy storage area corresponding to the target heat exchanger for heat exchange, until the heat exchange termination condition is reached, and then the target heat exchanger is controlled to stop operating.

[0011] Optionally, the stratified steam phase change heat storage and release management method provided in this application further includes: Based on the supply and demand relationship, heat release instructions are generated; Based on the required temperature in the user demand data in the heat release command, the circulating pump is controlled to start so that the heat exchange medium enters the target heat exchanger corresponding to the required temperature and exchanges heat with the phase change material in the target energy storage area corresponding to the target heat exchanger. The circulating pump is controlled to stop running when the second heat exchange termination condition is reached.

[0012] Thirdly, this application provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-mentioned layered vapor phase change storage and heat release management method.

[0013] Fourthly, this application provides a computer-readable storage medium storing computer instructions, which, when executed by a processor, implement the aforementioned layered vapor phase change heat storage and release management method.

[0014] This application provides a layered steam phase change heat storage and release management system and method, which uses energy storage devices in different energy storage areas to store steam at different temperatures, thereby improving heat storage density and energy storage efficiency and reducing heat loss; it uses different phase change materials in each energy storage area to store heat, thereby improving the stability and service life of the phase change materials and reducing operation and maintenance costs; and it dynamically adjusts the heat storage and release process through supply and demand forecasting and intelligent control to achieve precise matching of steam supply and demand and improve the system's operating efficiency.

[0015] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This diagram illustrates the structure of a layered steam phase change heat storage and release management system provided in an embodiment of the present invention. Figure 2 A schematic diagram of the energy storage device provided in an embodiment of the present invention is shown; Figure 3 A schematic flowchart of a layered steam phase change heat storage and release management method provided by an embodiment of the present invention is shown. Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present invention is shown. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] Existing phase change thermal energy storage systems include: steam input pipelines, single-tank phase change thermal energy storage devices, steam output pipelines, circulating pumps, temperature sensors, and a simple start-stop control system; wherein, the single-tank phase change thermal energy storage device incorporates a single phase change material; the working process of the phase change thermal energy storage system is as follows: During the energy storage phase: when steam supply is excessive (e.g., user demand is lower than boiler output), the steam input valve is opened, releasing high-temperature steam (150-180℃, pressure 0.5-1.0). The pressure (MPa) is directly fed into the phase change thermal storage device, where it contacts and exchanges heat with the phase change material (commonly paraffin or inorganic salts, phase change temperature 120-140℃) inside the tank. After absorbing the latent heat of steam, the phase change material changes from solid to liquid, completing energy storage. In the energy release stage: when user demand increases (such as during peak production periods), the circulating pump is started to send the high-temperature heat transfer oil (or water) at the bottom of the tank into the thermal storage device. After exchanging heat with the liquid phase change material, the temperature rises, and then the heat is transferred to the cold water through the heat exchanger to generate saturated steam (100-120℃), which is then supplied to the user through the output pipeline. Furthermore, the phase change material (PCM) heat storage density of the phase change thermal storage system is approximately 250-300 kJ / kg; the energy storage efficiency (the proportion of steam heat converted into the latent heat of the PCM) is approximately 75%-80%; the temperature fluctuation range of the steam generated by energy release is ±8-10℃; the annual operating efficiency of the system is approximately 65%-70%; the service life of the PCM is approximately 3-5 years (repeated phase changes can easily lead to stratification and leakage problems); the control logic of the PCM system is controlled only by a single-point temperature sensor inside the tank. When the PCM temperature is ≥140℃, the steam input is shut off (energy storage is completed); when the temperature is ≤120℃, energy release is stopped or energy storage is restarted. This cannot match steam of different temperature levels, resulting in heat waste of high-temperature steam and insufficient energy storage density. In addition, determining the heat storage and release of the thermal storage device based on the temperature of the PCM makes it impossible to achieve precise supply and demand allocation. This application provides a layered steam phase change heat storage and release management system and method. It uses energy storage devices in different energy storage areas to store steam at different temperatures, thereby improving heat storage density and energy storage efficiency and reducing heat loss. It uses different phase change materials in each energy storage area to store heat, thereby improving the stability and service life of the phase change materials and reducing operation and maintenance costs. It dynamically adjusts the heat storage and release process through supply and demand forecasting and intelligent control to achieve precise matching of steam supply and demand and improve the system's operating efficiency.

[0020] This application provides a layered steam phase change heat storage and release management system, see reference. Figure 1As shown in the embodiment of this application, the layered steam phase change heat storage and release management system includes: an energy storage device 110 and a control device 120. The energy storage device 110 includes a heat exchanger and an energy storage body. The energy storage body includes multiple energy storage areas, each of which is connected to a heat exchanger. Each energy storage area is provided with a different phase change material. The control device 120 is signal-connected to the energy storage device 110. The control device is used to acquire steam supply data and user demand data at the steam end; determine the supply and demand relationship corresponding to the steam supply data and user demand data at future times based on the steam supply data and user demand data; generate an energy storage command based on the supply and demand relationship; and control the target heat exchanger corresponding to the steam temperature in the steam supply data of the energy storage command to start, so that the steam at the steam end enters the target energy storage area corresponding to the target heat exchanger through the target heat exchanger for heat exchange, until the first heat exchange termination condition is reached, and then control the target heat exchanger to stop operating.

[0021] In specific implementation, such as Figure 2 As shown, the energy storage device 110 includes a high-temperature steam energy storage area (steam temperature T≥160℃) and a medium-temperature steam energy storage area (130℃≤steam temperature T<160℃). The high-temperature steam storage area is connected to one end of a high-temperature heat exchanger via a high-temperature pipeline, and the other end of the high-temperature heat exchanger is connected to the steam outlet via a high-temperature valve and a high-temperature pipeline. The high-temperature steam energy storage area uses a composite high-temperature phase change material, wherein the phase change temperature of the composite high-temperature phase change material is 160℃ and the latent heat is 380kJ / kg. The medium-temperature steam storage area is connected to one end of a medium-temperature heat exchanger via a medium-temperature pipeline, and the other end of the medium-temperature heat exchanger is connected to the steam outlet via a medium-temperature valve and a medium-temperature pipeline. The medium-temperature steam energy storage area uses a composite medium-temperature phase change material, wherein the phase change temperature of the composite medium-temperature phase change material is 130℃ and the latent heat is 350kJ / kg. In this embodiment, the composite high-temperature phase change material can be a composite high-temperature phase change material of "lithium nitrate-sodium nitrate mixed salt + expanded graphite"; the composite medium-temperature phase change material can be a composite medium-temperature phase change material of "modified paraffin + carbon fiber". This solves the problems of poor adaptability of single materials and low heat storage density in the existing technology, and enables the selection of suitable phase change materials according to steam of different temperature levels, thereby improving heat storage density, increasing energy storage efficiency and reducing heat loss.

[0022] Furthermore, the steam end can be an industrial boiler or a thermal power plant, etc.; the steam end can be equipped with one steam outlet, or it can be equipped with one high-temperature steam outlet and one medium-temperature steam outlet.

[0023] Furthermore, the energy storage device in this embodiment has a tank volume of 50-150 m³, with two layers of internal insulation, dividing it into an upper high-temperature steam energy storage area and a lower medium-temperature steam energy storage area, and employing a polyurethane insulation layer (200mm thick); it also uses a stainless steel / aluminum alloy sealed shell to encapsulate the phase change material, and incorporates a low-frequency vibration anti-agglomeration design to prevent phase change material delamination and leakage, thereby extending the service life of the phase change material to 8-10 years and reducing operation and maintenance costs; the energy storage device provided in this embodiment achieves an energy storage efficiency of over 90% compared to existing energy storage devices, and the energy storage efficiency of the energy storage device can be determined by the following formula:

[0024] In the formula, For energy storage efficiency, For the quality of composite high-temperature phase change materials, The latent heat of phase change in composite high-temperature phase change materials For the quality of composite medium-temperature phase change materials, The latent heat of phase change in composite medium-temperature phase change materials, For high-temperature steam flow rate, The enthalpy difference is the heat release from high-temperature steam. For medium-temperature steam flow rate, This represents the enthalpy difference for heat release from intermediate-temperature steam. High-temperature pipelines can transport steam at temperatures of 160℃ to 180℃ and pressures of 0.8MPa to 1.0MPa; medium-temperature pipelines can transport steam at temperatures of 130℃ to 150℃ and pressures of 0.5MPa to 0.7MPa. The heat exchange areas of both high-temperature and medium-temperature heat exchangers range from 8 m³ to 15 m³, and their heat exchange efficiencies are both ≥95%. Both the high-temperature valve and the medium-temperature valve are electrically adjustable valves with an adjustment accuracy of ±1%.

[0025] In practical implementation, the working process of the control device 120 is as follows: Step 1: Data Acquisition Phase: The control device updates the data every 10 minutes. First, the control device's acquisition unit obtains steam supply data and energy storage status data collected by sensors installed in the energy storage device. The steam supply data includes high-temperature steam flow rate. High-temperature steam temperature Medium-temperature steam flow rate and medium-temperature steam temperature Energy storage status data includes the temperature of the high-temperature steam energy storage area. Temperature of the medium-temperature steam energy storage area Phase change material phase change state (solid or liquid); acquire user demand data collected by sensors installed at the user end, including real-time steam demand flow rate. and steam demand temperature The unit for flow rate is t / h, and the unit for temperature is ℃. Step 2: Supply and Demand Forecasting Stage: Based on steam supply data and user demand data, the control device determines the supply and demand relationship corresponding to the future steam supply data and user demand data; further, based on the steam supply flow rate and pipeline heat loss coefficient of the steam supply data, it determines the steam supply flow rate corresponding to the future steam supply data; based on the steam demand flow rate and demand correction coefficient of the user demand data, it determines the steam demand flow rate corresponding to the future user demand data; based on the steam supply flow rate and steam demand flow rate, it determines the supply and demand relationship corresponding to the future steam supply data and user demand data; in this embodiment, the future steam supply flow rate is determined by the following first forecast formula:

[0026] In the formula, For future steam supply flow, For high-temperature steam flow rate, The enthalpy difference is the heat release from high-temperature steam. For medium-temperature steam flow rate, This represents the enthalpy difference for heat release from intermediate-temperature steam. This is the heat loss from the pipes; among which, In the formula, k is the heat transfer coefficient of the pipe, and L is the pipe length. This refers to the average steam temperature, which is the average temperature of the steam output over a preset time period. The ambient temperature of the energy storage device can be obtained through sensors installed on the energy storage device. The steam demand flow rate at future times is determined using the following second prediction formula:

[0027] In the formula, For future steam demand flow rates, For the user's steam demand flow rate, The enthalpy difference for real-time vapor heat release for users. The demand fluctuation coefficient can be determined using historical steam demand flow data, and its value is generally between 0.1 and 0.3. Step 31: Trigger Control Phase: When it is determined that the steam supply flow rate is greater than the steam demand flow rate, an energy storage command is generated, i.e. When this occurs (indicating oversupply), an energy storage command is triggered; Step 41: Command Execution Stage: Based on the steam temperature in the steam supply data of the energy storage command, control the target heat exchanger corresponding to the steam temperature to start, so that the steam at the steam end enters the target energy storage area corresponding to the target heat exchanger for heat exchange, until the first heat exchange termination condition is reached, then control the target heat exchanger to stop operating; wherein, the first heat exchange termination condition is that the user's steam demand flow rate is equal to the steam supply flow rate, or the phase change material is in a completely liquid state. In this embodiment, when the steam temperature T in the steam supply data is ≥160℃, the steam temperature is determined to be high-temperature steam. The control device controls the high-temperature valve to open, allowing the high-temperature steam to enter the high-temperature heat exchanger and indirectly exchange heat with the composite high-temperature phase change material in the high-temperature steam energy storage area. The composite high-temperature phase change material absorbs heat and changes from solid to liquid. After heat exchange, the steam condenses into water and returns to the steam end (i.e., the boiler) through the recovery pipeline. When the steam temperature in the steam supply data is 130℃≤T<160℃, the steam temperature is determined to be medium-temperature steam. The control device controls the medium-temperature valve to open, allowing the medium-temperature steam to enter the medium-temperature heat exchanger and indirectly exchange heat with the composite medium-temperature phase change material in the medium-temperature steam energy storage area. The composite medium-temperature phase change material absorbs heat and changes from solid to liquid. After heat exchange, the steam condenses into water and returns to the steam end (i.e., the boiler) through the recovery pipeline. Changes in the energy storage area are monitored by multi-point temperature sensors in the energy storage area. For example, when the temperature of the composite high-temperature phase change material is ≥165℃ (completely liquid) and the temperature of the composite medium-temperature phase change material is ≥135℃ (completely liquid), or when the temperature is predicted... At that time, the control device closes the high-temperature valve and the medium-temperature valve to complete energy storage.

[0028] In this embodiment, the energy storage device 110 further includes a circulation pump connected to multiple heat exchangers; a control device is signal-connected to the circulation pump, and the control device is used to generate a heat release command based on the supply and demand relationship; based on the demand temperature in the user demand data in the heat release command, the control device controls the circulation pump to start, so that the heat exchange medium enters the phase change material of the target energy storage area corresponding to the demand temperature in the target heat exchanger for heat exchange, until the second heat exchange termination condition is reached, and then controls the circulation pump to stop running.

[0029] In specific implementation, such as Figure 2 As shown, the energy storage device 110 also includes a circulation pump; wherein the circulation pump is connected to a high-temperature heat exchanger and a medium-temperature heat exchanger via pipelines. In this embodiment, the circulation pump is a variable frequency circulation pump with a flow rate of 5 m³ / h to 20 m³ / h.

[0030] Furthermore, the control device is signal-connected to the circulating pump. The control device generates a heat release command based on the supply and demand relationship. Based on the demand temperature in the user demand data of the heat release command, the control device starts the circulating pump so that the heat exchange medium enters the target heat exchanger corresponding to the demand temperature and exchanges heat with the phase change material in the target energy storage area corresponding to the target heat exchanger. The circulating pump stops operating when the second heat exchange termination condition is reached. The output flow rate of the circulating pump can be determined by: obtaining the output steam temperature of the energy storage device; determining the output flow rate of the circulating pump based on the output steam temperature, the demand temperature, the rated flow rate of the circulating pump, and the temperature regulation coefficient; the second heat exchange termination condition is that the user's steam demand flow rate is less than the steam supply flow rate, or the phase change material is in a completely solid state.

[0031] In practical implementation, the specific working process of the control device 120 also includes: Step 32: Trigger Control Phase: When it is determined that the steam supply flow rate is less than the steam demand flow rate, a heat release command is generated, i.e. When the supply is insufficient, a heat release command is triggered. Step 42: Command Execution Stage: Based on the required temperature in the user demand data of the heat release command, control the circulation pump to start, so that the heat exchange medium enters the target heat exchanger corresponding to the required temperature and exchanges heat with the phase change material in the target energy storage region corresponding to the target heat exchanger, until the second heat exchange termination condition is reached, then control the circulation pump to stop running. In this embodiment of the application, when the required temperature in the user demand data... When the temperature is high, the high-temperature steam storage area is activated to release heat. Specifically, the control device controls the circulating pump to send cold water (the heat exchange medium) into the high-temperature heat exchanger, where it exchanges heat with the liquid composite high-temperature phase change material to generate high-temperature steam at 160°C to 170°C, which is then transported to the user via pipeline. When the user's required temperature is 120°C or lower... When the temperature is <150℃, the medium-temperature steam energy storage area is activated for heat release. Specifically, the control device controls the circulating pump to send cold water (i.e., the heat exchange medium) into the medium-temperature heat exchanger, where it exchanges heat with the liquid composite high-temperature phase change material to generate medium-temperature steam at 130℃ to 140℃, which is then transported to the user via pipeline. When the temperature of the composite high-temperature phase change material is ≤155℃ (completely solid) and the temperature of the composite medium-temperature phase change material is ≤125℃ (completely solid), or as predicted... At this time, the control device shuts down the circulating pump to stop heat release; Furthermore, the control device is also used to monitor the output steam temperature of the energy storage device in real time. ,like The target flow rate of the circulating pump is then determined according to the following formula to improve the heat exchange rate:

[0032] In the formula, The target flow rate of the circulating pump, The rated flow rate of the circulating pump, To meet the user's temperature requirements, The output temperature of the energy storage device. This is the temperature regulation coefficient, typically set to 5℃; like If the control device controls the operation of the high-temperature valve and / or the medium-temperature valve, it reduces the input steam flow from the steam end to the energy storage device, or reduces the temperature of the output steam from the steam end by using the bypass valve located at the outlet of the steam end. If the temperatures of the phase change materials in the energy storage device have all dropped to their phase change points (i.e., the temperature of the composite high-temperature phase change material is 160℃, and the temperature of the composite medium-temperature phase change material is 130℃) and In such cases, auxiliary steam supply is activated, meaning steam from the steam source is directly delivered to the user via pipeline, ensuring the output temperature of the energy storage device is maintained. The fluctuation value is ±3℃.

[0033] This application embodiment controls the temperature fluctuation of the heat release steam within ±3℃ by adjusting the circulation pump flow rate and the auxiliary steam replenishment mechanism, thus solving the problem of large temperature fluctuation in the prior art and meeting the high-precision process requirements of chemical, food processing and other industries.

[0034] In this embodiment, the heat storage and release command is dynamically triggered based on steam supply data and user demand data to achieve precise matching of supply and demand and avoid untimely energy storage or insufficient energy release.

[0035] In this embodiment of the application, the control device in the layered steam phase change heat storage and release management system is further used for: Phase change material status detection: The density sensor installed in the energy storage device monitors the parameters of the phase change material at a preset period and determines the status of the phase change material based on the parameters. If stratification or leakage occurs, an alarm is triggered and maintenance is prompted. Life extension mechanism: After each heat storage and release cycle, the control device uses a low-frequency vibration device (power 500W) to slightly vibrate the phase change material to avoid crystallization and agglomeration, thereby extending the service life to 8-10 years. Data optimization: The stratified steam phase change heat storage and release management system automatically stores daily heat storage and release data, generates monthly optimization reports, and adjusts parameters such as the heat exchange area of ​​the phase change material and the rated flow rate of the circulating pump to continuously improve system efficiency.

[0036] This application provides a layered steam phase change heat storage and release management method, applicable to the control device in the aforementioned layered steam phase change heat storage and release management system. (See attached document.) Figure 3 As shown in the embodiments of this application, the layered steam phase change heat storage and release management method includes: Step 310: Obtain steam supply data and user demand data from the steam end; Step 320: Based on steam supply data and user demand data, determine the supply and demand relationship corresponding to the steam supply data and user demand data at future moments; Step 330: Generate energy storage instructions based on supply and demand. Step 340: Based on the steam temperature in the steam supply data in the energy storage command, control the target heat exchanger corresponding to the steam temperature to start, so that the steam at the steam end enters the target energy storage area corresponding to the target heat exchanger for heat exchange, until the heat exchange termination condition is reached, then control the target heat exchanger to stop running.

[0037] In an optional embodiment, the stratified steam phase change heat storage and release management method provided in this application further includes: Based on the supply and demand relationship, heat release instructions are generated; Based on the required temperature in the user demand data in the heat release command, the circulating pump is controlled to start so that the heat exchange medium enters the target heat exchanger corresponding to the required temperature and exchanges heat with the phase change material in the target energy storage area corresponding to the target heat exchanger. The circulating pump is controlled to stop running when the second heat exchange termination condition is reached.

[0038] It should be noted that the principle of the layered steam phase change storage and release heat management method provided in this application embodiment to solve the technical problem is similar to that of the layered steam phase change storage and release heat management system provided in this application embodiment. Therefore, the implementation of the layered steam phase change storage and release heat management method provided in this application embodiment can refer to the implementation of the layered steam phase change storage and release heat management system provided in this application embodiment, and the repeated parts will not be described again.

[0039] After introducing the layered steam phase change heat storage and release management system and method provided in the embodiments of this application, the electronic equipment provided in the embodiments of this application will be briefly introduced next.

[0040] See Figure 4 As shown, the electronic device 500 provided in this application embodiment includes at least a processor 501, a memory 502, and a computer program stored in the memory 502 and executable on the processor 501. When the processor 501 executes the computer program, it implements the layered vapor phase change storage and release heat management method provided in this application embodiment.

[0041] The electronic device 500 provided in this application embodiment may further include a bus 503 connecting different components (including processor 501 and memory 502). The bus 503 represents one or more types of bus structures, including memory bus, peripheral bus, local area bus, etc.

[0042] Memory 502 may include a readable storage medium in the form of volatile memory, such as random access memory (RAM) 5021 and / or cache memory 5022, and may further include read-only memory (ROM) 5023. Memory 502 may also include a program tool 5025 having a set (at least one) of program modules 5024, including but not limited to an operating subsystem, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0043] Processor 501 can be a single processing element or a collective term for multiple processing elements. For example, processor 501 can be a central processing unit (CPU) or one or more integrated circuits configured to implement the hierarchical vapor phase change heat storage and release management method provided in the embodiments of this application. Specifically, processor 501 can be a general-purpose processor, including but not limited to CPUs, application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0044] Electronic device 500 can communicate with one or more external devices 504 (e.g., keyboard, remote control, etc.), and also with one or more devices that enable a user to interact with electronic device 500 (e.g., mobile phone, computer, etc.), and / or with devices that enable electronic device 500 to communicate with one or more other electronic devices 500 (e.g., router, modem, etc.). This communication can be performed through input / output (I / O) interface 505. Furthermore, electronic device 500 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) through network adapter 506. Figure 4 As shown, network adapter 506 communicates with other modules of electronic device 500 via bus 503. It should be understood that, although... Figure 4As not shown, other hardware and / or software modules may be used in conjunction with the electronic device 500, including but not limited to microcode, device drivers, redundant processors, external disk drive arrays, Redundant Arrays of Independent Disks (RAID) subsystems, tape drives, and data backup storage subsystems.

[0045] It should be noted that, Figure 4 The electronic device 500 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0046] The computer-readable storage medium provided in the embodiments of this application is described below. The computer-readable storage medium provided in the embodiments of this application stores computer instructions, which, when executed by a processor, implement the layered steam phase change storage and heat release management method provided in the embodiments of this application. Specifically, the computer instructions can be built into or installed in the processor, so that the processor can implement the layered steam phase change storage and heat release management method provided in the embodiments of this application by executing the built-in or installed computer instructions.

[0047] In addition, the layered steam phase change storage and heat release management method provided in this application embodiment can also be implemented as a computer program product. The computer program product includes program code, which implements the layered steam phase change storage and heat release management method provided in this application embodiment when running on a processor.

[0048] The computer program product provided in this application embodiment may employ one or more computer-readable storage media, which may be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination thereof. Specifically, more specific examples (a non-exhaustive list) of computer-readable storage media include electrical connections with one or more wires, portable disks, hard disks, RAM, ROM, erasable programmable read-only memory (EPROM), optical fibers, portable compact disc read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0049] The computer program product provided in this application embodiment can be a CD-ROM and include program code, and can also run on electronic devices such as computers. However, the computer program product provided in this application embodiment is not limited thereto. In this application embodiment, the computer-readable storage medium can be any tangible medium that contains or stores program code, which can be used by or in conjunction with an instruction execution system, device, or apparatus.

[0050] It should be noted that although several units or sub-units of the device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of this application, the features and functions of two or more units described above can be embodied in one unit. Conversely, the features and functions of one unit described above can be further divided and embodied by multiple units.

[0051] Furthermore, although the operations of the method of this application are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0052] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0053] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of the embodiments of this application. Therefore, if these modifications and variations to the embodiments of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A stratified steam phase change heat storage and release management system, characterized in that, include: An energy storage device includes a heat exchanger and an energy storage body. The energy storage body includes multiple energy storage regions, each of which is connected to a heat exchanger. Each energy storage region is provided with a different phase change material. A control device, signal-connected to the energy storage device, is used to acquire steam supply data and user demand data at the steam end; based on the steam supply data and user demand data, determine the supply and demand relationship corresponding to the steam supply data and user demand data at future times; generate an energy storage command based on the supply and demand relationship; and control the target heat exchanger corresponding to the steam temperature in the steam supply data of the energy storage command to start, so that the steam at the steam end enters the target energy storage area corresponding to the target heat exchanger through the target heat exchanger for heat exchange, until the first heat exchange termination condition is reached, and then control the target heat exchanger to stop operating.

2. The layered steam phase change heat storage and release management system according to claim 1, characterized in that, The control device is further configured to determine the steam supply flow rate corresponding to the steam supply data at a future time based on the steam supply flow rate and pipeline heat loss coefficient of the steam supply data; determine the steam demand flow rate corresponding to the user demand data at a future time based on the steam demand flow rate and demand correction coefficient of the user demand data; and determine the supply and demand relationship corresponding to the steam supply data and the user demand data at a future time based on the steam supply flow rate and the steam demand flow rate.

3. The layered steam phase change heat storage and release management system according to claim 2, characterized in that, The control device is further configured to generate an energy storage command when it is determined that the steam supply flow rate is greater than the steam demand flow rate.

4. The stratified steam phase change heat storage and release management system according to claim 1, characterized in that, The energy storage device further includes a circulation pump, which is connected to multiple heat exchangers; the control device is signal-connected to the circulation pump and is used to generate a heat release command based on the supply and demand relationship. Based on the required temperature in the user demand data in the heat release command, the circulation pump is controlled to start so that the heat exchange medium enters the phase change material of the target energy storage area corresponding to the target heat exchanger at the required temperature for heat exchange, until the second heat exchange termination condition is reached, at which point the circulation pump is controlled to stop running.

5. The stratified steam phase change heat storage and release management system according to claim 4, characterized in that, The control device is also used to acquire the output steam temperature of the energy storage device; and to determine the output flow rate of the circulation pump based on the output steam temperature, the required temperature, the rated flow rate of the circulation pump, and the temperature regulation coefficient.

6. The layered steam phase change heat storage and release management system according to claim 1 or 4, characterized in that, The first heat exchange termination condition is that the user's steam demand flow rate equals the steam supply flow rate, or the phase change material is in a completely liquid state. The second heat exchange termination condition is that the user's steam demand flow rate is less than the steam supply flow rate, or the phase change material is in a completely solid state.

7. A layered steam phase change heat storage and release management method, characterized in that, A control device suitable for use in a stratified steam phase change storage and release management system as described in any one of claims 1 to 6, comprising: Obtain steam supply data and user demand data from the steam source; Based on the steam supply data and the user demand data, determine the supply and demand relationship corresponding to the steam supply data and user demand data at future moments; Based on the supply and demand relationship, an energy storage command is generated; Based on the steam temperature of the steam supply data in the energy storage command, the target heat exchanger corresponding to the steam temperature is controlled to start, so that the steam at the steam end enters the target energy storage area corresponding to the target heat exchanger for heat exchange, until the heat exchange termination condition is reached, and then the target heat exchanger is controlled to stop operating.

8. The layered steam phase change heat storage and release management method according to claim 7, characterized in that, Also includes: Based on the supply and demand relationship, a heat release command is generated; Based on the required temperature in the user demand data in the heat release command, the circulating pump is controlled to start so that the heat exchange medium enters the phase change material of the target energy storage area corresponding to the target heat exchanger at the required temperature for heat exchange, until the second heat exchange termination condition is reached, at which point the circulating pump is controlled to stop running.

9. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the layered vapor phase change storage and release heat management method as described in any one of claims 7 to 8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the layered vapor phase change storage and release heat management method as described in any one of claims 7 to 8.

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