Single energy storage temperature control method and system based on working medium flow and temperature

Abstract

The invention discloses a monomer energy storage temperature control method and system based on working medium flow and temperature, and relates to the technical field of energy storage system control. In order to solve the problem of energy waste of an existing single energy storage system, the working medium flow, the outlet working medium temperature and the energy storage material temperature of the single energy storage system are monitored in real time, and a working medium flow measurement value, an outlet working medium temperature measurement value and an energy storage material temperature measurement value are provided for a temperature control unit; the temperature control unit generates an adjusting instruction of the working medium flow of the single energy storage system according to the working medium flow measurement value, the outlet working medium temperature measurement value and the energy storage material temperature measurement value through a preset rule; and the working medium flow adjusting unit adjusts the working medium flow of the single energy storage system according to the adjusting instruction. The method is mainly used for optimizing the energy release process of the single energy storage system, so that the temperature of the flowing working medium is stable, and the utilization rate of low-grade heat energy is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage system control, and particularly relates to a single-body energy storage temperature control method and control system based on working medium flow rate and temperature. Background Art

[0002] The working principle of the existing energy storage system is as follows: when there is an excess of energy, the energy is stored in the energy storage material; when the user's energy demand is high, the energy stored in the energy storage material is released in the form of doing work or heating and cooling. The energy storage system can break the time limit of energy supply, and is of great significance for the development of the renewable energy industry, especially for the application of renewable energy power generation methods in the power industry.

[0003] Currently, there are various energy storage technologies, which are divided into heat storage and power storage according to the form of stored energy. Compared with power storage, heat storage technology is more mature and widely used. In heat storage technology, according to the destination of the energy storage material in the energy storage system, it is divided into two categories: single-body thermal energy storage and double-tank thermal energy storage. Single-tank thermocline thermal energy storage, solid energy storage, etc. all belong to the former. Thanks to the characteristics of simple single-body energy storage system and cheap and easily available single-body energy storage material, single-body energy storage technology has been widely used in small-scale and distributed heating and steam supply. In addition, scholars have explored heating air for pipe warming with single-body energy storage, and believe that the single-body energy storage system can be applied to pipe preheating.

[0004] In a single-body energy storage system, during heat storage, the energy of other high-temperature working media is stored through the heat storage channel, and the system temperature rises; during heat release, the heat of the energy storage system is transferred to the flowing working medium through the heat release channel. Different from the double-tank energy storage technology, in the process of heat release in single-body energy storage, the temperature of the energy storage material gradually decreases, reducing the quality of the thermal energy stored in the single-body energy storage system, and thus causing the temperature of the flowing working medium to change (when the working medium flow rate remains unchanged). In some occasions where strict requirements are imposed on the working medium temperature, usually most of the heat of the single-body energy storage system is discarded to maintain the stability of the flowing working medium temperature, resulting in energy waste.

[0005] Therefore, there is a need for a single-body energy storage temperature control method and control system based on working medium flow rate and temperature, which has a simple structure and high energy utilization rate. Summary of the Invention

[0006] The present invention is to solve the problem of energy waste existing in the existing single-body energy storage system, and provides a single-body energy storage temperature control method and control system based on working medium flow rate and temperature, which has a simple structure and high energy utilization rate.

[0007] The single-body energy storage temperature control method based on working medium flow rate and temperature described in the present invention specifically includes the following steps: Real-time monitor the working fluid flow rate, outlet working fluid temperature, and energy storage material temperature of the single energy storage system, and provide the working fluid flow rate measurement value, outlet working fluid temperature measurement value, and energy storage material temperature measurement value to the temperature control unit; The temperature control unit generates an adjustment command for the working fluid flow rate of the single energy storage system through preset rule operations based on the temperature set value, the working fluid flow rate measurement value, the outlet working fluid temperature measurement value, and the energy storage material temperature measurement value; The adjustment command generates an opening adjustment command for the working fluid flow rate adjustment mechanism through the flow rate adjustment mechanism signal operation module, and the working fluid flow rate adjustment mechanism adjusts the working fluid flow rate of the single energy storage system according to the opening adjustment command.

[0008] Furthermore: The preset rule is: S1. According to the outlet working fluid temperature set value , the outlet working fluid temperature measurement value and the energy storage material temperature measurement value , determine whether the single energy storage system enters the heat storage mode: If , cut off the working fluid inlet of the single energy storage system, and the single energy storage system enters the heat storage mode; If , and , cut off the working fluid inlet of the single energy storage system, and the single energy storage system enters the heat storage mode; If , and , execute S2; Among them, represents the outlet working fluid temperature set value, represents the energy storage material temperature measurement value, represents the outlet working fluid temperature measurement value, is the first preset threshold; S2. If , the operator manually selects whether to finely adjust the working fluid flow rate adjustment mechanism; If , calculate the working fluid flow rate set value , adjust the working fluid flow rate based on the working fluid flow rate set value until the working fluid flow rate measurement value reaches the working fluid flow rate set value, and then judge again and again. If , repeat the calculation of the working fluid flow rate set value and adjustment until ; In the formula, is the relative difference of the outlet working fluid temperature, is the second preset threshold; S3. When , and the operator selects whether to perform automatic fine-tuning on the working fluid flow regulating mechanism. If the operator selects not to perform automatic fine-tuning, the process ends.

[0009] Further: in S2, the calculation of the set value of the working fluid flow rate is as follows: ; In the formula: m is the mass of the energy storage material; is the specific heat capacity at constant pressure of the energy storage material; is the temperature change rate of the energy storage material; is the specific heat capacity at constant pressure of the working fluid; is the measured value of the working fluid flow rate. [[ID=Z0]]

[0010] Further: in S3, the specific process of the fine-tuning includes: Automatically fine-tune the working fluid flow regulating mechanism according to a preset unit change amount. When , the working fluid flow regulating mechanism is adjusted upward by the preset unit change amount; when , the working fluid flow regulating mechanism is adjusted downward by the preset unit change amount; when , the process ends; when , repeat the fine-tuning.

[0011] Further: in S2, the calculation process of the relative difference of the outlet working fluid temperature is as follows: ; Among them, is the measured value of the outlet working fluid temperature, is the set value of the outlet working fluid temperature.

[0012] Further: the working fluid is water, air or heat-conducting oil.

[0013] The monomer energy storage temperature control system for realizing the above-mentioned working fluid flow and temperature according to the present invention includes a temperature control unit, a measurement unit and a working fluid flow control unit; the measurement unit includes a working fluid flow measurement device, an outlet working fluid temperature measurement device and an energy storage material temperature measurement device; the working fluid flow control unit includes a flow regulating mechanism signal operation module and a working fluid flow regulating mechanism. The working fluid flow measurement device, the outlet working fluid temperature measurement device, the energy storage material temperature measurement device and the working fluid flow regulating mechanism are all installed on the monomer energy storage system, and the output ends of the working fluid flow measurement device, the outlet working fluid temperature measurement device and the energy storage material temperature measurement device are signal-connected to the temperature control unit; the temperature control unit is bidirectionally signal-connected to the working fluid flow regulating unit.

[0014] Furthermore, the temperature control unit includes an input module, a storage module, and a preset rule operation module, which are connected in sequence; The input module is used to input a preset value. The output ends of the working fluid flow rate measuring device, the outlet working fluid temperature measuring device, the energy storage material temperature measuring device, and the working fluid flow rate regulating mechanism are all connected to the input end of the storage module in a signal connection manner. The output end of the preset rule operation module is connected to the input end of the flow rate regulating mechanism signal operation module, and the output end of the flow rate regulating mechanism signal operation module is connected to the input end of the working fluid flow rate regulating mechanism.

[0015] Furthermore, the working fluid flow rate measuring device adopts a thermal flowmeter, a differential pressure flowmeter, an ultrasonic flowmeter, or a target flowmeter; the outlet working fluid temperature measuring device and the energy storage material temperature measuring device adopt a thermocouple, a thermal resistor, or a radiation thermometer; the working fluid flow rate regulating mechanism adopts a flow control valve or an adjustable baffle.

[0016] The beneficial effects of the present invention are as follows: By controlling the flow rate and temperature of the flowing working fluid in the single-body energy storage system, the present invention is beneficial to maintaining the stability of the temperature of the flowing working fluid under heat release conditions, improving the utilization rate of the stored heat of the single-body energy storage material when the flowing working fluid approaches the boundary working temperature of the single-body energy storage system, and achieving the goal of energy conservation and emission reduction. The present invention has strong adaptability and can not only be used as a control method for the temperature of the flowing working fluid in the single-body energy storage system, but also be used in other occasions with temperature control requirements, and has important popularization and application value in the field of single-body energy storage systems and other industrial fields. Description of the Drawings

[0017] Figure 1 is a functional block diagram of a single-body energy storage temperature control system based on the working fluid flow rate and temperature; Figure 2 is a flowchart of a single-body energy storage temperature control method based on the working fluid flow rate and temperature. Detailed Embodiments

[0018] The following are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. The following embodiments are only used to explain the present invention and cannot be construed as a limitation to the present invention. The protection scope of the present invention should be subject to the protection scope of the claims. The following describes the embodiments of the present invention in detail. For the convenience of describing the present invention and simplifying the description, the technical terms used in the specification of the present invention should be interpreted in a broad sense, including but not limited to the conventional substitution schemes not mentioned in the present application, and including both direct implementation methods and indirect implementation methods.

[0019] Example 1 Combined Figure 1 with Figure 2 To illustrate this example, the temperature control method for a single - unit energy storage based on the working fluid flow rate and temperature disclosed in this example specifically includes the following steps: Real - time monitor the working fluid flow rate, the outlet working fluid temperature, and the single - unit energy storage material temperature of the single - unit energy storage system, and provide the working fluid flow rate measurement value to the temperature control unit , the outlet working fluid temperature measurement value and the energy storage material temperature measurement value ; The temperature control unit generates an adjustment instruction for the working fluid flow rate of the single - unit energy storage system through preset rule operations, based on the temperature set value, the working fluid flow rate measurement value , the outlet working fluid temperature measurement value and the energy storage material temperature measurement value ; The adjustment instruction generates an opening adjustment instruction for the working fluid flow rate adjustment mechanism through the signal operation module of the flow rate adjustment mechanism, and the working fluid flow rate adjustment mechanism adjusts the working fluid flow rate of the single - unit energy storage system according to the opening adjustment instruction.

[0020] The preset rules are as follows: S1. Determine whether the single - unit energy storage system enters the heat storage mode based on the outlet working fluid temperature set value, the outlet working fluid temperature measurement value, and the energy storage material temperature measurement value: If , cut off the working fluid inlet of the single - unit energy storage system, and the single - unit energy storage system enters the heat storage mode; if , and , cut off the working fluid inlet of the single - unit energy storage system, and the single - unit energy storage system enters the heat storage mode; if , and , execute S2; Among them, represents the outlet working fluid temperature set value, represents the energy storage material temperature measurement value, represents the outlet working fluid temperature measurement value, is the first preset threshold, and the default value of this numerical value is - 10°C, which can be manually adjusted by the operator

[0021] That is: when the first preset threshold is set to - 5°C, when the outlet working fluid temperature measurement value is lower than the energy storage material temperature measurement value , and their difference is greater than or equal to - 5°C, cut off the working fluid inlet of the single - unit energy storage system, and the single - unit energy storage system enters the heat storage mode; S2. If , the operator manually selects whether to finely adjust the working fluid flow regulating mechanism; if , then calculate the set value of the working fluid flow , based on the set value of the working fluid flow regulate the working fluid flow until the measured value of the working fluid flow reaches the set value of the working fluid flow, and then judge again and of the size, if , then repeat the calculation of the set value of the working fluid flow and adjust it until ; In the formula, is the relative difference of the outlet working fluid temperature, is the second preset threshold, the default value of this value is 10 °C, and it can be manually adjusted by the operator; Among them, the set value of the outlet working fluid temperature and the second preset threshold need to be input by the operator via the input module of the temperature control unit or stored in the storage module of the temperature control unit before starting the temperature control, the set value of the outlet working fluid temperature and the second preset threshold of the initial default value; each time an operation is required, the preset rule operation module calculates according to the set value of the outlet working fluid temperature and the second preset threshold for operation. The second preset threshold is determined by the user according to the occasion. The stricter the requirements for the working fluid temperature, the smaller the second preset threshold.

[0022] The set value of the outlet working fluid temperature refers to the temperature target value to be controlled by the temperature control unit. After the user inputs a new set value of the outlet working fluid temperature through the input module, it will overwrite the previous set value of the outlet working fluid temperature.

[0023] S3. When , and the operator can select to automatically finely adjust the working fluid flow regulating mechanism. If the automatic fine adjustment is not selected, the process ends.

[0024] When the measured value of the outlet working fluid temperature is lower than the measured value of the energy storage material temperature , and the difference is less than 10 °C, and the absolute value of the relative difference between the measured value of the outlet working fluid temperature and the set value of the outlet working fluid temperature , that is, the relative difference of the outlet working fluid temperature exceeds the second preset threshold , the preset rule operation module of the temperature control unit will calculate the set value of the working fluid flow according to the following expression .

[0025] The calculation process of the set value of the working medium flow rate is as follows: The calculation process is as follows: ; In the formula: m is the mass of the energy storage material; is the specific heat capacity at constant pressure of the energy storage material; is the temperature change rate of the energy storage material. The temperature measurement value of the energy storage material is sampled every minute and calculated according to ; where is the temperature measurement value of the energy storage material in the next minute; is the specific heat capacity at constant pressure of the working medium; is the measured value of the working medium flow rate.

[0026] The set value of the outlet working medium temperature is greater than the measured value of the energy storage material temperature , the control action of the temperature control unit is not executed; when the set value of the outlet working medium temperature is less than the measured value of the energy storage material temperature and the set value of the outlet working medium temperature is not lower than the minimum temperature required for a single energy storage material, the control action of the temperature control unit is executed, and the working medium flow rate regulating mechanism is adjusted to control the working medium flow rate so as to adjust the working medium temperature, so that the measured value of the outlet working medium temperature and the set value of the outlet working medium temperature The relative difference is lower than the second preset threshold . The set value of the outlet working medium temperature can be set in degrees Celsius (°C) or Kelvin (K).

[0027] Based on the set value of the working medium flow rate , the working medium flow rate regulating mechanism will increase or decrease until the measured value of the working medium flow rate reaches the set value of the working medium flow rate ; judge the relative difference between the measured value of the outlet working medium temperature and the set value of the outlet working medium temperature . If the absolute value of the relative difference (i.e., the relative difference of the outlet working medium temperature) is still greater than the second preset threshold , then repeat step S2; The second preset threshold is a parameter for judging whether to adjust the outlet working medium temperature. When the relative difference between the measured value of the outlet working medium temperature and the set value of the outlet working medium temperature is greater than the second preset threshold ​When the temperature change of the working medium and the change of the working medium flow rate are used to determine the adjustment amount of the working medium flow rate, the working medium flow rate adjustment mechanism is adjusted according to the corresponding relationship between the working medium flow rate and the working medium flow rate adjustment mechanism pre-stored in the signal operation module of the flow rate adjustment mechanism, so that the measured value of the outlet working medium temperature and the set value of the outlet working medium temperature The relative difference The absolute value of is reduced. As shown in Table 1, the corresponding relationship between the working medium flow rate and the working medium flow rate adjustment mechanism is preset and stored according to the flow-opening characteristic curves corresponding to different valves.

[0028] Table 1 Flow-Opening Corresponding Table

[0029] In S2, the specific process of the fine adjustment includes: Automatically fine-tune the working medium flow rate adjustment mechanism according to the preset unit change amount. When , the working medium flow rate adjustment mechanism is adjusted upward by the preset unit change amount; when , the working medium flow rate adjustment mechanism is adjusted downward by the preset unit change amount; when , the process ends; when , repeat the fine adjustment. The unit change amount can be set to a change amount of ±1%.

[0030] In S2, the calculation process of the relative difference of the outlet working medium temperature is as follows: ; In the formula, is the relative difference of the outlet working medium temperature, is the measured value of the outlet working medium temperature, is the set value of the outlet working medium temperature.

[0031] The working medium is water, air or heat transfer oil.

[0032] Embodiment 2 Combined with Figure 1 and Embodiment 1 to illustrate this embodiment. The control system for implementing the single-body energy storage temperature control method based on the working medium flow rate and temperature disclosed in this embodiment includes a temperature control unit, a measurement unit and a working medium flow rate control unit; the measurement unit includes a working medium flow rate measurement device, an outlet working medium temperature measurement device and an energy storage material temperature measurement device; the working medium flow rate control unit includes a flow rate adjustment mechanism signal operation module and a working medium flow rate adjustment mechanism; The working fluid flow rate measuring device, the outlet working fluid temperature measuring device, the energy storage material temperature measuring device, and the working fluid flow rate regulating mechanism are all installed on the single energy storage system. The output ends of the working fluid flow rate measuring device, the outlet working fluid temperature measuring device, and the energy storage material temperature measuring device are signal-connected to the temperature control unit; the temperature control unit is bidirectionally signal-connected to the working fluid flow rate regulating unit.

[0033] The working fluid flow rate measuring device is used to provide a measured value of the working fluid flow rate ; that is, the working fluid flow rate device serves as a flow rate measuring unit of the controlled object. More specifically, the flow meter unit may include flow rate measuring units such as a thermal flow meter unit, a differential pressure flow meter unit, an ultrasonic flow meter unit, and a target flow meter unit.

[0034] The outlet working fluid temperature measuring device is used to provide a measured value of the outlet working fluid temperature of the single energy storage system ; that is, the outlet working fluid temperature measuring device serves as a temperature measuring unit of the controlled object.

[0035] The energy storage material temperature measuring device is used to provide a measured value of the energy storage material temperature ; that is, the energy storage material temperature measuring device serves as a temperature measuring unit that affects the controlled object.

[0036] The temperature measuring unit may include temperature measuring units such as thermocouples, thermal resistors, and radiation thermometer units.

[0037] The flow rate regulating mechanism signal operation module is used to receive the flow rate set value calculated by the preset rule operation module and generate an opening set value based on the pre-stored relationship between the flow rate and the opening of the working fluid flow rate regulating mechanism, which is used as the input of the working fluid flow rate regulating mechanism.

[0038] The working fluid flow rate regulating mechanism is used to regulate the flow rate of the working fluid according to the regulation instruction. It is used to increase and decrease the working fluid flow rate. The working fluid flow rate regulating mechanism serves as a flow rate control unit of the controlled object and may include a flow rate regulating valve, an adjustable baffle, etc.

[0039] The temperature control unit, based on the outlet working fluid temperature set value 、the measured value of the working fluid flow rate 、the measured value of the outlet working fluid temperature and the measured value of the energy storage material temperature to control the working fluid flow rate regulating mechanism to regulate the working fluid flow rate so that the measured value of the outlet working fluid temperature reaches the outlet working fluid temperature set value .

[0040] That is, the temperature control unit is a unit that is controlled as a whole for the working medium flow rate and temperature control device. The temperature control unit includes an arithmetic element for signal exchange or arithmetic processing between various structural components, an input / output unit, a storage element, etc.

[0041] The temperature control unit includes an input module, a storage module, and a preset rule arithmetic module. The input module, the storage module, and the preset rule arithmetic module are connected in sequence. The input module is used to input preset values, and the preset values include the outlet working medium temperature set value, the first preset threshold, and the second preset threshold. The output ends of the working medium flow rate measuring device, the outlet working medium temperature measuring device, the energy storage material temperature measuring device, and the working medium flow rate regulating mechanism are all connected to the input end of the storage module in a signal connection manner. The output end of the preset rule arithmetic module is connected to the input end of the flow rate regulating mechanism signal arithmetic module. And the working medium flow rate regulating mechanism is also connected to the storage module.

[0042] The temperature control unit has a storage module, and the storage module of the temperature control unit stores the outlet working medium temperature set value , the working medium flow rate measurement value , the outlet working medium temperature measurement value , the energy storage material temperature measurement value . These values are all parameters required for performing the temperature control of the single-body energy storage system involved.

[0043] The temperature control unit also has a preset rule arithmetic module. The preset rule arithmetic module calculates the working medium flow rate set value based on the relative difference between the outlet working medium temperature measurement value and the outlet working medium temperature set value , the working medium flow rate measurement value at the previous moment , the mass m of the single-body energy storage material, the constant pressure specific heat capacity of the single-body energy storage material , and the constant pressure specific heat capacity of the working medium and . .

[0044] The working medium flow rate measuring unit adopts a thermal flowmeter, a differential pressure flowmeter, an ultrasonic flowmeter, or a target flowmeter; the outlet working medium temperature measuring unit and the energy storage material temperature measuring device adopt a thermocouple, a thermistor, or a radiation thermometer; the working medium flow rate regulating mechanism adopts a flow regulating valve or an adjustable baffle.

Claims

1. A temperature control method for a single energy storage based on the working fluid flow rate and temperature, characterized in that The specific steps include: Real-time monitor the working fluid flow rate, the outlet working fluid temperature, and the energy storage material temperature of the single-unit energy storage system, and provide the working fluid flow rate measurement value, the outlet working fluid temperature measurement value, and the energy storage material temperature measurement value to the temperature control unit; The temperature control unit generates an adjustment command for the working fluid flow rate of the single-unit energy storage system through preset rule operations, based on the temperature set value, the working fluid flow rate measurement value, the outlet working fluid temperature measurement value, and the energy storage material temperature measurement value; The adjustment command generates an opening adjustment command for the working fluid flow rate adjustment mechanism through the flow rate adjustment mechanism signal operation module, and the working fluid flow rate adjustment mechanism adjusts the working fluid flow rate of the single-unit energy storage system according to the opening adjustment command.

2. The monomer energy storage temperature control method based on the working medium flow rate and temperature according to claim 1, wherein The preset rule is: S1. Determine whether the single energy storage system enters the heat storage mode according to the set value of the outlet working medium temperature , the measured value of the outlet working medium temperature and the measured value of the energy storage material temperature : If , cut off the working medium inlet of the single energy storage system, and the single energy storage system enters the heat storage mode; if , and , cut off the working medium inlet of the single energy storage system, and the single energy storage system enters the heat storage mode; if , and , then execute S2; Among them, represents the set value of the outlet working fluid temperature, represents the measured value of the energy storage material temperature, represents the measured value of the outlet working fluid temperature, is the first preset threshold; S2. If , the operator manually selects whether to fine-tune the working medium flow regulating mechanism; if , calculate the set value of the working medium flow , and adjust the working medium flow based on the set value of the working medium flow until the measured value of the working medium flow reaches the set value of the working medium flow, and then judge again and size, if , repeat calculating the set value of the working medium flow and adjusting until ; In the formula, is the relative difference of the outlet working fluid temperature, is the second preset threshold value; S3. When , and the operator selects whether to perform automatic fine-tuning on the working medium flow regulating mechanism. If the operator selects not to perform automatic fine-tuning, the process ends.

3. The monomer energy storage temperature control method based on the working medium flow rate and temperature according to claim 2, characterized in that, In S2, the calculation process of the set value of the working fluid flow rate is as follows: ； Where: m is the mass of the energy storage material; is the specific heat capacity at constant pressure of the energy storage material; is the temperature change rate of the energy storage material; is the specific heat capacity at constant pressure of the working fluid; is the measured value of the flow rate of the working fluid.

4. The monomer energy storage temperature control method based on the working medium flow rate and temperature according to claim 2, wherein, In S3, the specific process of the fine adjustment includes: Automatically fine-tune the working fluid flow regulating mechanism according to a preset unit change amount. When , the working fluid flow regulating mechanism is adjusted upward by a preset unit change amount; when , the working fluid flow regulating mechanism is adjusted downward by a preset unit change amount; when , the process ends; when , repeat the fine-tuning.

5. The monomer energy storage temperature control method based on the working medium flow rate and temperature according to claim 2, characterized in that In S2, the calculation process of the relative difference of the outlet working fluid temperature is as follows: ； wherein, is the measured value of the outlet working medium temperature, is the set value of the outlet working medium temperature.

6. The monomer energy storage temperature control method based on the working medium flow rate and temperature according to claim 2, wherein The working fluid is water, air, or heat-conducting oil.

7. A control system for implementing the monomer energy storage temperature control method based on working fluid flow rate and temperature according to any one of claims 1-6, characterized in that, It includes a temperature control unit, a measurement unit, and a working fluid flow rate control unit; the measurement unit includes a working fluid flow rate measurement device, an outlet working fluid temperature measurement device, and an energy storage material temperature measurement device; the working fluid flow rate control unit includes a flow rate adjustment mechanism signal operation module and a working fluid flow rate adjustment mechanism; The working fluid flow rate measurement device, the outlet working fluid temperature measurement device, the energy storage material temperature measurement device, and the working fluid flow rate adjustment mechanism are all installed on the single-unit energy storage system, and the output ends of the working fluid flow rate measurement device, the outlet working fluid temperature measurement device, and the energy storage material temperature measurement device are signal-connected to the temperature control unit; the temperature control unit is bidirectionally signal-connected to the working fluid flow rate adjustment unit.

8. The control system of the single-body energy storage temperature control method based on the working medium flow rate and temperature according to claim 7, characterized in that The temperature control unit includes an input module, a storage module, and a preset rule operation module, and the input module, the storage module, and the preset rule operation module are connected in sequence; The input module is used to input preset values, and the output ends of the working fluid flow rate measurement device, the outlet working fluid temperature measurement device, the energy storage material temperature measurement device, and the working fluid flow rate adjustment mechanism are all signal-connected to the input end of the storage module. The output end of the preset rule operation module is connected to the input end of the flow rate adjustment mechanism signal operation module, and the output end of the flow rate adjustment mechanism signal operation module is connected to the input end of the working fluid flow rate adjustment mechanism.

9. The control system of the single-body energy storage temperature control method based on working medium flow rate and temperature according to claim 8, characterized in that, The working fluid flow rate measurement device adopts a thermal flowmeter, a differential pressure flowmeter, an ultrasonic flowmeter, or a target flowmeter; the outlet working fluid temperature measurement device and the energy storage material temperature measurement device adopt a thermocouple, a thermal resistor, or a radiation thermometer; the working fluid flow rate adjustment mechanism adopts a flow control valve or an adjustable baffle.

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