Miniature compressed air energy storage experiment system

Abstract

The invention discloses a miniature compressed air energy storage experiment system. An experiment hardware system comprising an equipment assembly and a data acquisition assembly is constructed; constructing an experimental platform for realizing data acquisition and protection on a hardware system; mCGS software is adopted by the platform to simulate the operation logic and the working process of the miniature compressed air energy storage system, and hardware system components can be flexibly replaced by collecting data parameters of measurement points, so that the platform completely simulates the control connection logic of the system; the platform realizes control instruction input, data processing and table output of hardware components, alarm information output, dynamic visual display of a system working process and system working characteristic exploration through the MCGS touch screen. Through the compact structure, efficient energy conversion, accurate control and monitoring and enhanced safety, many problems of a traditional compressed air energy storage experiment system in the aspects of energy efficiency, accuracy, safety and the like are solved.

Description

Technical Field

[0001] The invention relates to the technical field of micro compressed air energy storage, and in particular to a micro compressed air energy storage experimental system. Background Art

[0002] Under the background of the "dual carbon" goal, renewable energy such as wind power and photovoltaic power has developed rapidly, but its intermittent and volatile nature has led to insufficient power grid absorption capacity, resulting in the problem of wind and solar power abandonment. Energy storage technology is an effective means to solve these problems and achieve peak-shaving and valley-filling of power grids. Physical energy storage such as compressed air energy storage systems are mostly used in large-capacity energy storage environments, used for energy storage and release of power transmission networks, so as to achieve peak-shaving and valley-filling of large power grids, but there are few studies on micro compressed air energy storage systems on the distribution network side. With the continuous increase in the penetration rate of distributed new energy power such as photovoltaic and wind power in the distribution network, in order to ensure the safe and stable operation of the distribution network, the application scenarios of distributed energy storage on the distribution network side have gradually emerged, and the long-life micro compressed air energy storage system is also one of the important types of distributed energy storage. Micro compressed air energy storage technology has attracted attention due to its large installed capacity, environmental protection, and short construction period. Compared with traditional compressed air energy storage systems, micro compressed air energy storage has the advantages of small footprint, low power generation cost, and low operation and maintenance costs, and can manage energy more efficiently. It does not rely on fossil fuels, reduces environmental pollution, and is suitable for small businesses, homes, and microgrids. As the demand for efficient energy storage solutions increases, micro compressed air energy storage system technology shows broad application prospects.

[0003] At present, there is a lack of experimental systems specifically used for the research of micro compressed air energy storage systems on the market. To this end, it is necessary to develop an experimental system that can simulate the working principle of a micro compressed air energy storage system and has data acquisition and control functions. The system should be able to accurately monitor and record the changes in key parameters during operation and provide researchers with detailed experimental data support. Through experimental data under different working conditions, researchers can deeply analyze the system characteristics, thereby promoting the further development and optimization of compressed air energy storage technology. Summary of the invention

[0004] 1. Technical problems to be solved: In response to the above technical problems, the present invention provides a miniature compressed air energy storage experimental system, which solves many problems of traditional compressed air energy storage experimental systems in terms of energy efficiency, accuracy, safety, etc. through a compact structure, efficient energy conversion, precise control and monitoring, and enhanced safety, and provides researchers with detailed experimental data support and characteristic analysis support.

[0005] 2. Technical solution: A miniature compressed air energy storage experimental system, characterized in that it includes: constructing an experimental hardware system for simulating the workflow and data acquisition analysis of a miniature compressed air energy storage system; the experimental hardware system includes an equipment component and a data acquisition component; wherein the equipment component includes an air compressor, an air storage tank, an air dryer, a solenoid valve, an electric regulating valve, a pressure regulating valve, a pneumatic motor, a generator and an electronic load connected in sequence; the data acquisition component is used to collect relevant operating parameters during the operation of the equipment component, including a flow meter for measuring the flow of compressed air entering the pneumatic motor, a torque sensor for measuring the torque of the pneumatic motor, and a pressure sensor for measuring the air inlet pressure of the pneumatic motor; a voltage and current acquisition module of the electronic load and a temperature sensor for monitoring the compressed air in the pneumatic motor; Construct an experimental platform for data collection and protection of the hardware system; the experimental platform adopts MCGS configuration software; MCGS configuration software can simulate the operating logic and workflow of the micro compressed air energy storage system, and build a complete experimental platform for the micro compressed air energy storage system by collecting data parameters measured at measurement points; the experimental platform can adjust the corresponding equipment components according to the adjustment of components in the experimental hardware system, and improve its corresponding functional logic functions, so that the experimental platform can completely simulate the control connection logic of the micro compressed air energy storage system; the experimental platform is equipped with an MCGS touch screen, and the data collected by the sensor is transmitted to the experimental platform through the bus; the experimental platform uses the MCGS touch screen to realize the input of control instructions of hardware components, data processing and table output, alarm information output, dynamic and intuitive display of the working process of the micro compressed air energy storage system, and exploration of the working characteristics of the system.

[0006] Furthermore, the working process of the equipment component includes: the air compressor generates compressed air, the generated compressed air enters the air storage tank through the pipeline, flows through the air dryer, solenoid valve, electric regulating valve, flow meter, pressure regulating valve in sequence through the pipeline, and enters the cylinder of the pneumatic motor; the compressed air in the pneumatic motor expands outward and performs work and is then discharged, while driving the pneumatic motor to rotate, thereby driving the generator to generate current and realize the conversion of mechanical energy into electrical energy; the generator provides electrical energy for the electronic load.

[0007] Furthermore, the data acquisition process of the data acquisition component includes: the compressed air coming out of the air tank passes through the air dryer and is measured by a flow meter, and the compressed air flow entering the pneumatic motor is regulated by an electric regulating valve; the pressure at the inlet of the pneumatic motor is collected and regulated by a pressure regulating valve; the torque sensor is used to measure the speed, torque and output power of the pneumatic motor in real time; the voltage and current acquisition module of the electronic load is used to measure the output current and voltage of the generator; and the temperature of the compressed gas in the cylinder of the pneumatic motor is measured by a temperature sensor.

[0008] Furthermore, it also includes: The torque sensor measures and displays the torque and speed of the pneumatic motor in real time. The experimental platform calculates the power of the generator based on the received torque and speed values. The flowmeter measures the compressed air flow entering the pneumatic motor and transmits the measured value to the experimental platform; the experimental platform controls the compressed air flow by controlling the valve opening of the electric regulating valve; the valve opening is remotely set through the touch screen, and the valve opening size corresponds to the instantaneous flow value of the compressed gas; during control, the touch screen displays the valve opening and the corresponding instantaneous flow and cumulative flow value of the compressed gas in real time; The temperature sensor and pressure sensor are used to monitor the temperature and pressure of the compressed air entering the pneumatic motor. The user changes the inlet pressure of the air pump of the pneumatic motor through the pressure regulating valve. The temperature and pressure data are updated in real time and displayed on the touch screen. The voltage and current acquisition module can monitor the voltage and current of the electronic load in real time. The user can change the output voltage and current of the generator by adjusting the resistance value of the electronic load, and the voltage and current output by the generator are displayed on the touch screen; The solenoid valve is linked to the pneumatic motor. When the speed of the pneumatic motor exceeds the preset speed limit, the solenoid valve automatically cuts off the airflow and stops the operation of the pneumatic motor.

[0009] Furthermore, the exploration of the working characteristics of the system includes: obtaining characteristic curves of the pneumatic motor and the generator under different pressures, characteristic curves of the pneumatic motor speed, output power and torque, and obtaining the optimal speed range of the pneumatic motor through the study of the output power of the generator and the speed of the pneumatic motor; specifically: Adjust the valve opening of the electric regulating valve to keep the flow of compressed air at the preset flow value, change the pressure at the inlet of the pneumatic motor through the pressure regulating valve, and then obtain the characteristic curves of the pneumatic motor and generator under different pressures; In the experimental platform, the pressure regulating valve is set to different pressure values, and the size of the electronic load is adjusted in turn, and the working parameter data collected by the data acquisition component is recorded, and then the characteristic curve of the pneumatic motor speed, output power and torque is drawn; The one-to-one correspondence between the output power of the generator and the speed of the pneumatic motor is obtained, and the data is analyzed to obtain the optimal speed range of the pneumatic motor; specifically: the output power of the generator generally shows an upward trend with the increase of the motor speed, that is, when the speed is low, the output power increases with the speed less, but when the speed reaches a certain value, the output power increases significantly and the increase rate accelerates; as the speed further increases, the output power gradually tends to be stable and finally stabilizes; this shows that although increasing the speed helps to increase the output power, in order to control energy consumption, the speed should be kept within a certain range; the relationship between speed and torque is usually negatively correlated, and the torque decreases when the speed increases; through the above data analysis, the performance changes of the pneumatic motor under different working conditions can be intuitively observed, and the working efficiency and load characteristics of the pneumatic motor can also be analyzed, so as to optimize the system design and achieve optimal energy efficiency and performance.

[0010] Furthermore, the experimental hardware system is of open design, in which each device component and data acquisition component can be connected in a replaceable manner.

[0011] 3. Beneficial effects: (1) This method provides a miniature compressed air energy storage experimental system. Based on the miniature compressed air energy storage system, corresponding equipment components and acquisition components are designed. Through reasonable equipment design and precise control, the system can simulate the working process of the actual energy storage system in a laboratory environment with high simulation, and has important practical application value. The system adopts a modular design and has good scalability. It can flexibly adjust and add components according to different experimental needs, adapt to energy storage research of different scales and functions, and greatly improve the adaptability and experimental efficiency of the system. In addition, the open design and stainless steel flat plate structure ensure the stability and precise fixation of the equipment, especially the stability of the air pump on the platform, ensuring that the performance test is carried out under highly repeatable and precise conditions. The design concept of the system is closely integrated with practical applications, providing a reliable experimental platform for the research of energy storage technology, which has significant practical significance.

[0012] (2) The experimental system of this method can significantly improve the energy conversion efficiency and extend the life of the equipment by integrating high-efficiency air compressors, pneumatic motors and air dryer technologies. At the same time, the system is equipped with advanced sensors and control equipment to monitor key parameters in real time to ensure the accuracy and safety of the experiment, providing a large amount of experimental data support for the development of efficient micro energy storage systems. These data help researchers optimize the maximum power tracking control strategy of the energy storage system and improve the response speed and overall performance of the system.

[0013] (3) During the design process of the experimental system of this method, there are many challenges, such as system complexity, multi-parameter monitoring, load regulation, pressure and temperature fluctuations, data processing and analysis, system stability and safety. At the same time, the experimental system needs to accurately monitor and record key parameters such as pressure, flow, and temperature to adapt to different load conditions. In addition, the system also has the function of automatic data storage and export, which comprehensively analyzes the performance of the system under different working conditions, so as to gain an in-depth understanding of the system's operating efficiency and performance changes. The system also has an alarm function. When a fault or abnormality occurs, it will issue an alarm in time to remind the operator to take necessary measures, which significantly improves the safety and reliability of the system. In the evaluation of the operation of the established experimental system, this experimental system has completely overcome the above difficulties. In addition, the experimental data shows that the system has efficient data acquisition and processing capabilities to ensure accurate and reliable data. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the overall schematic diagram of the experimental system; Figure 2 This is an interface diagram of a data acquisition system of an experimental platform in a specific embodiment; Figure 3 The power characteristic and torque characteristic diagram of the pneumatic motor obtained by data analysis in a specific embodiment. DETAILED DESCRIPTION

[0015] The present invention will be described in detail below with reference to the accompanying drawings.

[0016] As attached Figure 1 As shown, a micro compressed air energy storage experimental system includes: constructing an experimental hardware system for simulating the workflow and data acquisition analysis of a micro compressed air energy storage system; the experimental hardware system includes an equipment component and a data acquisition component; wherein the equipment component includes an air compressor, an air storage tank, an air dryer, a solenoid valve, an electric regulating valve, a pressure regulating valve, a pneumatic motor, a generator and an electronic load connected in sequence; the data acquisition component is used to collect relevant operating parameters during the operation of the equipment component, including a flow meter for measuring the flow of compressed air entering the pneumatic motor, a torque sensor for measuring the torque of the pneumatic motor, and a pressure sensor for measuring the air inlet pressure of the pneumatic motor; a voltage and current acquisition module of the electronic load and a temperature sensor for monitoring the compressed air in the pneumatic motor; Construct an experimental platform for data collection and protection of the hardware system; the experimental platform adopts MCGS configuration software; MCGS configuration software can simulate the operating logic and workflow of the micro compressed air energy storage system, and build a complete experimental platform for the micro compressed air energy storage system by collecting data parameters measured at measurement points; the experimental platform can adjust the corresponding equipment components according to the adjustment of components in the experimental hardware system, and improve its corresponding functional logic functions, so that the experimental platform can completely simulate the control connection logic of the micro compressed air energy storage system; the experimental platform is equipped with an MCGS touch screen, and the data collected by the sensor is transmitted to the experimental platform through the bus; the experimental platform uses the MCGS touch screen to realize the input of control instructions of hardware components, data processing and table output, alarm information output, dynamic and intuitive display of the working process of the micro compressed air energy storage system, and exploration of the working characteristics of the system.

[0017] Furthermore, the working process of the equipment component includes: the air compressor generates compressed air, the generated compressed air enters the air storage tank through the pipeline, flows through the air dryer, solenoid valve, electric regulating valve, flow meter, pressure regulating valve in sequence through the pipeline, and enters the cylinder of the pneumatic motor; the compressed air in the pneumatic motor expands outward and performs work and is then discharged, while driving the pneumatic motor to rotate, thereby driving the generator to generate current and realize the conversion of mechanical energy into electrical energy; the generator provides electrical energy for the electronic load.

[0018] Furthermore, the data acquisition process of the data acquisition component includes: the compressed air coming out of the air tank passes through the air dryer and is measured by a flow meter, and the compressed air flow entering the pneumatic motor is regulated by an electric regulating valve; the pressure at the inlet of the pneumatic motor is collected and regulated by a pressure regulating valve; the torque sensor is used to measure the speed, torque and output power of the pneumatic motor in real time; the voltage and current acquisition module of the electronic load is used to measure the output current and voltage of the generator; and the temperature of the compressed gas in the cylinder of the pneumatic motor is measured by a temperature sensor.

[0019] Furthermore, it also includes: The torque sensor measures and displays the torque and speed of the pneumatic motor in real time. The experimental platform calculates the power of the generator based on the received torque and speed values. The flowmeter measures the compressed air flow entering the pneumatic motor and transmits the measured value to the experimental platform; the experimental platform controls the compressed air flow by controlling the valve opening of the electric regulating valve; the valve opening is remotely set through the touch screen, and the valve opening size corresponds to the instantaneous flow value of the compressed gas; during control, the touch screen displays the valve opening and the corresponding instantaneous flow and cumulative flow value of the compressed gas in real time; The temperature sensor and pressure sensor are used to monitor the temperature and pressure of the compressed air entering the pneumatic motor. The user changes the inlet pressure of the air pump of the pneumatic motor through the pressure regulating valve. The temperature and pressure data are updated in real time and displayed on the touch screen. The voltage and current acquisition module can monitor the voltage and current of the electronic load in real time. The user can change the output voltage and current of the generator by adjusting the resistance value of the electronic load, and the voltage and current output by the generator are displayed on the touch screen; The solenoid valve is linked to the pneumatic motor. When the speed of the pneumatic motor exceeds the preset speed limit, the solenoid valve automatically cuts off the airflow and stops the operation of the pneumatic motor.

[0020] Furthermore, the exploration of the working characteristics of the system includes: obtaining characteristic curves of the pneumatic motor and the generator under different pressures, characteristic curves of the pneumatic motor speed, output power and torque, and obtaining the optimal speed range of the pneumatic motor through the study of the output power of the generator and the speed of the pneumatic motor; specifically: Adjust the valve opening of the electric regulating valve to keep the flow of compressed air at the preset flow value, change the pressure at the inlet of the pneumatic motor through the pressure regulating valve, and then obtain the characteristic curves of the pneumatic motor and generator under different pressures; In the experimental platform, the pressure regulating valve is set to different pressure values, and the size of the electronic load is adjusted in turn, and the working parameter data collected by the data acquisition component is recorded, and then the characteristic curve of the pneumatic motor speed, output power and torque is drawn; The one-to-one correspondence between the output power of the generator and the speed of the pneumatic motor is obtained, and the data is analyzed to obtain the optimal speed range of the pneumatic motor; specifically: the output power of the generator generally shows an upward trend with the increase of the motor speed, that is, when the speed is low, the output power increases with the speed less, but when the speed reaches a certain value, the output power increases significantly and the increase rate accelerates; as the speed further increases, the output power gradually tends to be stable and finally stabilizes; this shows that although increasing the speed helps to increase the output power, in order to control energy consumption, the speed should be kept within a certain range; the relationship between speed and torque is usually negatively correlated, and the torque decreases when the speed increases; through the above data analysis, the performance changes of the pneumatic motor under different working conditions can be intuitively observed, and the working efficiency and load characteristics of the pneumatic motor can also be analyzed, so as to optimize the system design and achieve optimal energy efficiency and performance.

[0021] Furthermore, the experimental hardware system is of open design, in which each device component and data acquisition component can be connected in a replaceable manner. Specific embodiment: like Figure 2 Shown is the control display interface of the touch screen in this embodiment.

[0023] During the experiment, the flow meter is used to measure the compressed air flow entering the pneumatic motor. The size of the gas flow can be achieved by adjusting the valve opening controlled by the electric actuator, and the valve opening can be remotely set through the touch screen. During operation, the user can manually enter a set valve opening value, and the touch screen will display the instantaneous flow and cumulative flow value of the gas in real time, so as to facilitate monitoring and adjustment of the flow and ensure accurate control of the experimental process.

[0024] The touch screen can display the temperature and pressure of the compressed air. The temperature and pressure sensors equipped in the system are used to monitor the status of the compressed air. Users can change the inlet pressure of the pneumatic motor by adjusting the pressure regulating valve in the hardware component. The relevant data will be updated in real time and displayed on the touch screen. At the same time, the torque sensor can measure the torque, speed and output power of the air pump. The voltage and current sensors are used to monitor the voltage and current of the electronic load in real time. Users can adjust the output voltage and current of the generator by adjusting the size of the electronic load and view its output on the touch screen.

[0025] This experimental system has the function of automatically collecting data from various devices, and when the system is running stably, the user can click the "Start Saving" button to start data storage, stop data storage through the "Stop Saving" button, and generate an Excel file through the "Export Data" button to facilitate data analysis under different working conditions. Through these data, users can study the relationship between the output power, gas consumption, and speed of the pneumatic motor and the voltage, current, and output power of the generator, and draw the corresponding characteristic curves. For example, the system performance can be deeply analyzed by studying the relationship between the speed and output power of the pneumatic motor under different pressures of the system. The specific method is to adjust the pressure regulating valve to different pressure values, and adjust the size of the electronic load in turn. Under each working condition, use the data acquisition system to record the data of various parameters and export the results. Finally, draw the characteristic curve of the pneumatic motor speed and output power based on the collected data as shown in the attached figure. Figure 3 As shown, further performance research is carried out.

[0026] In addition, this experimental system also has an alarm processing function. When the speed of the pneumatic motor exceeds the preset limit or the system has equipment failure or abnormality, an alarm will be issued in time to ensure the safety and smooth progress of the experiment. By adopting the MCGS simulation system, the data acquisition system can achieve collaborative work among multiple devices, provide real-time and accurate data monitoring and control, support the collection and analysis of key parameters such as pneumatic motors, generators, and gas flow and pressure, and provide strong support for experimental research.

[0027] Although the present invention has been disclosed as above in terms of preferred embodiments, they are not intended to limit the present invention. Anyone skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined by the claims of this application.

Claims

1. A miniature compressed air energy storage experimental system, characterized in that: include: Constructing an experimental hardware system for simulating the workflow and data acquisition analysis of a micro compressed air energy storage system; the experimental hardware system includes a device component and a data acquisition component; The equipment components include an air compressor, an air storage tank, an air dryer, a solenoid valve, an electric regulating valve, a pressure regulating valve, a pneumatic motor, a generator and an electronic load connected in sequence; the data acquisition component is used to collect relevant operating parameters during the operation of the equipment components, including a flow meter for measuring the flow of compressed air entering the pneumatic motor, a torque sensor for measuring the torque of the pneumatic motor, and a pressure sensor for measuring the air inlet pressure of the pneumatic motor; a voltage and current acquisition module of the electronic load and a temperature sensor for monitoring the compressed air in the pneumatic motor; Construct an experimental platform for data collection and protection of hardware systems; the experimental platform uses MCGS configuration software; MCGS configuration software can simulate the operating logic and workflow of the micro compressed air energy storage system, and build a complete experimental platform for the micro compressed air energy storage system by collecting data parameters measured at measurement points; the experimental platform can adjust the corresponding equipment components according to the adjustment of components in the experimental hardware system, and improve its corresponding functional logic functions, so that the experimental platform can completely simulate the control connection logic of the micro compressed air energy storage system; the experimental platform is equipped with an MCGS touch screen, and the data collected by the sensor is transmitted to the experimental platform through the bus; the experimental platform uses the MCGS touch screen to realize the input of control instructions of hardware components, data processing and table output, alarm information output, dynamic and intuitive display of the working process of the micro compressed air energy storage system, and exploration of the system working characteristics.

2. A miniature compressed air energy storage experimental system according to claim 1, characterized in that: The working process of the equipment component includes: the air compressor generates compressed air, the generated compressed air enters the air storage tank through the pipeline, flows through the air dryer, the solenoid valve, the electric regulating valve, the flow meter, and the pressure regulating valve in sequence through the pipeline, and then enters the cylinder of the pneumatic motor; the compressed air in the pneumatic motor expands outward and performs work and is discharged, while driving the pneumatic motor to rotate, thereby driving the generator to generate current and realize the conversion of mechanical energy into electrical energy; the generator provides electrical energy for the electronic load.

3. A miniature compressed air energy storage experimental system according to claim 1, characterized in that: The data acquisition process of the data acquisition component includes: the compressed air coming out of the air tank passes through the air dryer and is measured by a flow meter, and the compressed air flow entering the pneumatic motor is regulated by an electric regulating valve; the pressure at the inlet of the pneumatic motor is collected and regulated by a pressure regulating valve; the torque sensor is used to measure the speed, torque and output power of the pneumatic motor in real time; the voltage and current acquisition module of the electronic load is used to measure the output current and voltage of the generator; and the temperature of the compressed gas in the cylinder of the pneumatic motor is measured by a temperature sensor.

4. A miniature compressed air energy storage experimental system according to claim 3, characterized in that: Also includes: The torque sensor measures and displays the torque and speed of the pneumatic motor in real time. The experimental platform calculates the power of the generator based on the received torque and speed values. The flowmeter measures the compressed air flow entering the pneumatic motor and transmits the measured value to the experimental platform; the experimental platform controls the compressed air flow by controlling the valve opening of the electric regulating valve; the valve opening is remotely set through the touch screen, and the valve opening size corresponds to the instantaneous flow value of the compressed gas; during control, the touch screen displays the valve opening and the corresponding instantaneous flow and cumulative flow value of the compressed gas in real time; The temperature sensor and pressure sensor are used to monitor the temperature and pressure of the compressed air entering the pneumatic motor. The user changes the inlet pressure of the air pump of the pneumatic motor through the pressure regulating valve. The temperature and pressure data are updated in real time and displayed on the touch screen. The voltage and current acquisition module can monitor the voltage and current of the electronic load in real time. The user can change the output voltage and current of the generator by adjusting the resistance value of the electronic load, and the voltage and current output by the generator are displayed on the touch screen; The solenoid valve is linked to the pneumatic motor. When the speed of the pneumatic motor exceeds the preset speed limit, the solenoid valve automatically cuts off the airflow and stops the operation of the pneumatic motor.

5. A miniature compressed air energy storage experimental system according to claim 1, characterized in that: The exploration of the working characteristics of the system includes: obtaining the characteristic curves of the pneumatic motor and the generator under different pressures, the characteristic curves of the pneumatic motor speed, output power and torque, and obtaining the optimal speed range of the pneumatic motor through the study of the output power of the generator and the speed of the pneumatic motor; specifically: Adjust the valve opening of the electric regulating valve to keep the flow of compressed air at the preset flow value, change the pressure at the inlet of the pneumatic motor through the pressure regulating valve, and then obtain the characteristic curves of the pneumatic motor and generator under different pressures; In the experimental platform, the pressure regulating valve is set to different pressure values, and the size of the electronic load is adjusted in turn, and the working parameter data collected by the data acquisition component is recorded, and then the characteristic curve of the pneumatic motor speed, output power and torque is drawn; The one-to-one correspondence between the output power of the generator and the speed of the pneumatic motor is obtained, and the data is analyzed to obtain the optimal speed range of the pneumatic motor; specifically: the output power of the generator generally shows an upward trend with the increase of the motor speed, that is, when the speed is low, the output power increases with the speed less, but when the speed reaches a certain value, the output power increases significantly and the increase rate accelerates; as the speed further increases, the output power gradually tends to be stable and finally stabilizes; this shows that although increasing the speed helps to increase the output power, in order to control energy consumption, the speed should be kept within a certain range; the relationship between speed and torque is usually negatively correlated, and the torque decreases when the speed increases; through the above data analysis, the performance changes of the pneumatic motor under different working conditions can be intuitively observed, and the working efficiency and load characteristics of the pneumatic motor can also be analyzed, so as to optimize the system design and achieve optimal energy efficiency and performance.

6. A miniature compressed air energy storage experimental system according to claim 1, characterized in that: The experimental hardware system is an open design, in which each device component and data acquisition component can be connected in a replaceable manner.

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