Method and device for calculating efficiency of compressed air energy storage system

Abstract

The embodiment of the application provides a compressed air energy storage system efficiency calculation method and device, and is applied to the energy storage field. The method comprises the following steps: determining the energy storage power received by the compressed air energy storage system during energy storage based on the rated working parameters of the compressed air energy storage system; determining the energy release power released by the compressed air energy storage system during energy release based on the rated working parameters of the compressed air energy storage system; and determining the working efficiency of the compressed air energy storage system according to the energy storage power and the energy release power. Based on the above technical scheme, the energy storage power and the energy release power are determined based on the rated working parameters of the compressed air energy storage system, without considering the working condition of the system, so that the calculation speed of the working efficiency of the compressed air energy storage system is improved, and the calculation complexity of the working efficiency of the compressed air energy storage system is reduced.

Description

Technical Field

[0001] This application relates to the field of energy storage, and in particular to a method and device for calculating the efficiency of a compressed air energy storage system. Background Technology

[0002] As the global energy structure moves towards sustainability and diversification, compressed air energy storage technology is showing great application potential.

[0003] Within the current technological framework, calculating the operating efficiency of compressed air energy storage systems is difficult. This is especially true when performing efficiency calculations, which require handling situations where various system components deviate from their rated operating conditions, making the calculations complex and slow.

[0004] Therefore, proposing a simple and fast method for calculating the efficiency of compressed air energy storage systems is an urgent problem to be solved. Summary of the Invention

[0005] This application provides a method and device for calculating the efficiency of a compressed air energy storage system. The method determines the working efficiency of the compressed air energy storage system based on its rated operating parameters, thereby reducing the complexity of calculating the working efficiency of the compressed air energy storage system and increasing the speed of the calculation.

[0006] In a first aspect, embodiments of this application provide a method for calculating the efficiency of a compressed air energy storage system. The method includes: determining the energy storage power received by the compressed air energy storage system during energy storage based on the rated operating parameters of the compressed air energy storage system; determining the energy release power released by the compressed air energy storage system during energy release based on the rated operating parameters of the compressed air energy storage system; and determining the operating efficiency of the compressed air energy storage system based on the energy storage power and the energy release power.

[0007] Based on the above technical solution, the energy storage power and energy release power can be determined based on the rated operating parameters of the compressed air energy storage system without considering the system's operating conditions. This reduces the computational complexity of the energy storage power and energy release power, increases the calculation speed for determining the energy storage power and energy release power, and further improves the calculation speed for increasing the working efficiency of the compressed air energy storage system.

[0008] In one embodiment, determining the energy storage power received by the compressed air energy storage system during energy storage based on the rated operating parameters of the compressed air energy storage system includes: determining the air parameters of the compressed air energy storage system before energy storage and the air parameters after energy storage; and calculating the energy storage power based on the rated operating parameters of the compressed air energy storage system, according to the air parameters before and after energy storage.

[0009] In this embodiment, the energy storage power can be determined based on the rated operating parameters of the compressed air energy storage system without considering the system's operating conditions. This reduces the computational complexity of the energy storage power and increases the calculation speed for determining the energy storage power. Furthermore, it improves the calculation speed for increasing the operating efficiency of the compressed air energy storage system and reduces the computational complexity of the operating efficiency calculation.

[0010] In one embodiment, the aforementioned air parameters include the air temperature before compression cooling, the air pressure before compression cooling, the pressure loss value during compression cooling, and the temperature drop value during compression cooling. The compressed air energy storage system includes a compressor. The calculation of energy storage power based on the air parameters before and after energy storage includes: determining the air pressure after compression cooling based on the air pressure before compression cooling, the compressor's compression ratio, and the pressure loss value during compression cooling; determining the air temperature after compression cooling based on the air temperature before compression cooling, the temperature drop value during compression cooling, the compressor's rated isentropic efficiency, the air's adiabatic factor, and the compressor's compression ratio; and determining the energy storage power based on the air temperature after compression cooling, the air pressure after compression cooling, the air velocity, the air's heat capacity, and the compressor's isentropic efficiency.

[0011] In this embodiment, the energy storage power can be determined based on the rated operating parameters of the compressed air energy storage system without considering the system's operating conditions. This reduces the computational complexity of energy storage power calculation, increases the calculation speed for determining energy storage power, and further improves the calculation speed for increasing the operating efficiency of the compressed air energy storage system, while reducing the computational complexity of calculating the operating efficiency of the compressed air energy storage system. Furthermore, a method for determining energy storage power is specifically provided, improving the feasibility of the embodiments in this application.

[0012] In one embodiment, determining the energy release power of the compressed air energy storage system during energy release includes: determining the air parameters of the compressed air energy storage system before and after energy release; and calculating the energy release power based on the rated operating parameters of the compressed air energy storage system, according to the air parameters before and after energy release.

[0013] In this embodiment, the energy release power can be determined based on the rated operating parameters of the compressed air energy storage system without considering the system's operating conditions. This reduces the computational complexity of the energy release power and increases the calculation speed for determining the energy storage power. Furthermore, it improves the calculation speed for increasing the operating efficiency of the compressed air energy storage system and reduces the computational complexity of the operating efficiency calculation.

[0014] In one embodiment, the aforementioned air parameters include the air temperature before regenerative expansion, the air pressure before regenerative expansion, the pressure increase during regenerative expansion, and the temperature rise during regenerative expansion. The compressed air energy storage system includes an expander. The calculation of the energy release power based on the rated operating parameters of the compressed air energy storage system, according to the air parameters before and after energy release, includes: determining the air pressure after regenerative expansion based on the air pressure before regenerative expansion, the expander's rated expansion ratio, and the pressure loss during regenerative expansion; determining the air temperature after regenerative expansion based on the air temperature before regenerative expansion, the temperature drop during regenerative expansion, the compressor's rated isentropic efficiency, the air's adiabatic factor, and the compressor's compression ratio; and determining the energy storage power based on the air temperature after regenerative expansion, the air pressure after regenerative expansion, the air velocity, the air's heat capacity, and the compressor's isentropic efficiency.

[0015] In this embodiment, the energy release power can be determined based on the rated operating parameters of the compressed air energy storage system without considering the system's operating conditions. This reduces the computational complexity of the energy release power calculation, increases the calculation speed for determining the energy storage power, and further improves the calculation speed for increasing the operating efficiency of the compressed air energy storage system, while reducing the computational complexity of the operating efficiency calculation. Furthermore, a method for determining the energy release power is specifically provided, improving the feasibility of this embodiment.

[0016] In one embodiment, the method further includes: calculating the air pressure after heat recovery based on the rated operating parameters of the compressed air energy storage system and the air parameters before heat recovery.

[0017] In this embodiment, the air pressure of the compressed air energy storage system after heat recovery is calculated based on the rated operating parameters of the compressed air energy storage system, thereby reducing the computational complexity and improving the computational speed.

[0018] In one embodiment, the above-mentioned calculation of the air temperature after heat recovery based on the rated operating parameters of the compressed air energy storage system includes: determining the air pressure after heat recovery based on the air pressure before heat recovery, the air temperature before heat recovery, the storage time, the surface area of ​​the air storage chamber, the volume of the air storage chamber, and the rated heat loss coefficient of the air storage chamber.

[0019] In this embodiment, the air pressure of the compressed air energy storage system after heat recovery is calculated based on the rated operating parameters of the compressed air energy storage system, thereby reducing computational complexity and improving computational speed. Furthermore, a method for calculating the air pressure of the compressed air energy storage system after heat recovery is specifically provided, improving the feasibility of this embodiment.

[0020] In one embodiment, the compressor is a multi-stage compressor and the expander is a multi-stage expander.

[0021] Secondly, embodiments of this application provide an electronic device, including a processor and a memory. The processor is coupled to the memory; the memory stores computer instructions, which are loaded and executed by the processor to enable the electronic device to implement any of the methods provided in the first aspect.

[0022] Thirdly, embodiments of this application provide a chip, which includes: a processor and an interface circuit; the interface circuit is used to receive code instructions and transmit them to the processor; the processor is used to run the code instructions to execute any of the methods provided in the first aspect.

[0023] Fourthly, embodiments of this application provide a computer-readable storage medium storing at least one computer program instruction, which is loaded and executed by a processor to implement any of the methods provided in the first aspect above.

[0024] Fifthly, embodiments of this application provide a computer program product, including computer execution instructions, which, when executed on a computer, cause the computer to perform any of the methods provided in the first aspect.

[0025] The possible implementations of aspects two through five have similar effects to those of aspect one and the possible designs of aspect one, and will not be elaborated upon here. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a compressed air energy storage system;

[0027] Figure 2 A flowchart illustrating a method for calculating the efficiency of a compressed air energy storage system provided in this application embodiment;

[0028] Figure 3 A flowchart illustrating another method for calculating the efficiency of a compressed air energy storage system provided in this application embodiment;

[0029] Figure 4 A flowchart illustrating another method for calculating the efficiency of a compressed air energy storage system provided in this application embodiment;

[0030] Figure 5 A flowchart illustrating another method for calculating the efficiency of a compressed air energy storage system provided in this application embodiment;

[0031] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0032] Figure 7 This is a schematic diagram of the structure of another electronic device provided in an embodiment of this application. Detailed Implementation

[0033] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0034] In the description of this application, unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship. For example, A / B can mean A or B. "And / or" in this application is merely a description of the relationship between the related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. A and B can be singular or plural.

[0035] In the description of this application, unless otherwise stated, "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0036] Furthermore, to facilitate a clear description of the technical solutions in the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with substantially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0037] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner to facilitate understanding.

[0038] It is understood that the term "embodiment" used throughout the specification means that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, various embodiments throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It is understood that in the various embodiments of this application, the sequence number of each process does not imply the order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0039] It is understood that some optional features in the embodiments of this application can be implemented independently in certain scenarios without relying on other features, such as the current solution on which they are based, to solve the corresponding technical problems and achieve the corresponding effects. Alternatively, they can be combined with other features as needed in certain scenarios. Correspondingly, the apparatus given in the embodiments of this application can also implement these features or functions, which will not be elaborated here.

[0040] In this application, unless otherwise specified, the same or similar parts between the various embodiments can be referred to each other. Unless otherwise specified or logically conflicting, the terminology and / or descriptions between different embodiments are consistent and can be mutually referenced. Different embodiments can be combined to form new embodiments based on their inherent logical relationships. The following embodiments of this application do not constitute a limitation on the scope of protection of this application.

[0041] The following describes the relevant technologies of the embodiments of this application:

[0042] I. Compressed air energy storage (CAES) is an energy storage technology.

[0043] like Figure 1 As shown, compressed air energy storage systems typically include the following equipment:

[0044] 1. Compressor.

[0045] The compressor is a key piece of equipment in the energy storage phase of a compressed air energy storage system, its function being to compress air from low pressure to high pressure. Multi-stage compressors are typically used in compressed air energy storage systems, allowing the air pressure to be progressively increased to higher levels. Each stage of a multi-stage compressor has a cooling device to reduce air temperature and improve compression efficiency. For example, some large compressed air energy storage systems may use three-stage or four-stage compressors.

[0046] 2. Gas storage chamber.

[0047] A gas storage chamber is a device used to store high-pressure air. Common gas storage chambers include underground salt caverns, abandoned mine shafts, and high-pressure containers. Underground salt caverns are ideal gas storage chambers because they have good sealing properties, large volume, and low permeability. Abandoned mine shafts can also be converted for gas storage, but they need to be reinforced and sealed. If suitable underground space is unavailable, surface-mounted high-pressure containers can be used for gas storage, but this is relatively expensive and has limited storage capacity.

[0048] 3. Heat exchanger.

[0049] In compressed air energy storage systems, heat exchangers are primarily used to heat the cold air exiting the storage chamber during the energy release phase. They can utilize various heat sources, such as heat from natural gas combustion, industrial waste heat, or solar thermal energy collection, to bring the cold air to a suitable temperature, thereby improving the turbine's working efficiency.

[0050] 4. Turbines and generators.

[0051] The turbine operates during the energy release phase, utilizing the power generated by the expansion of high-pressure air to rotate. Turbine design must consider factors such as airflow, pressure, and temperature to ensure efficient conversion of the air's internal energy into mechanical energy. The generator, connected to the turbine, converts the turbine's mechanical energy into electrical energy.

[0052] It is understandable that compressed air energy storage systems may also include other equipment, but this is not specifically limited here.

[0053] II. Working process of compressed air energy storage system.

[0054] 1. Energy storage process.

[0055] The energy storage process mainly includes three aspects: air compression, heat recovery and storage, and air storage, as detailed below:

[0056] Air compression: During periods of low grid load, such as nighttime or holidays when electricity demand is low, air is compressed using a compressor. The compressor is typically a multi-stage compressor with an intercooler; during compression, the air's pressure and temperature rise rapidly.

[0057] Heat recovery and storage: The large amount of heat generated during air compression can be recovered and stored through heat exchange equipment such as coolers or regenerators. This heat can be reused in subsequent energy release processes to improve the overall efficiency of the system.

[0058] Air storage: High-pressure air, after compression and cooling, is stored in specific storage devices, which can be underground caverns, such as salt caverns or abandoned mine shafts, or surface pressure vessels. These storage sites need to meet geological conditions with high pressure resistance and good sealing, or possess excellent pressure resistance and sealing performance, to ensure the safe and stable storage of high-pressure air.

[0059] 2. Energy release process.

[0060] Air Release and Heating: During peak grid load periods, when electricity demand increases, stored high-pressure air is released from the gas storage device. The released high-pressure air is first heated by a regenerator or combustion chamber to raise its temperature. If combustion chamber heating is used, fuels such as natural gas are typically burned to provide additional heat energy to the air, further raising its temperature to a level that can effectively drive the turbine.

[0061] Expansion work: Heated, high-pressure, high-temperature air enters the turbine, expands and depressurizes within the turbine, converting the air's internal energy into kinetic energy, which drives the turbine blades to rotate. Turbines are generally multi-stage turbine expanders with interstage reheat equipment to improve expansion efficiency and output power.

[0062] Power generation: The generator connected to the turbine converts the turbine's rotational kinetic energy into electrical energy, which is then fed into the power grid for user use, thus realizing the process of converting stored compressed air energy into electrical energy and releasing it into the power grid.

[0063] As the global energy structure moves towards sustainability and diversification, compressed air energy storage technology is showing great application potential.

[0064] Within the current technological framework, calculating the operating efficiency of compressed air energy storage systems is difficult. This is especially true when performing efficiency calculations, which require handling situations where various system components deviate from their rated operating conditions, making the calculations complex and slow.

[0065] Therefore, proposing a simple and fast method for calculating the efficiency of compressed air energy storage systems is an urgent problem to be solved.

[0066] Based on this, embodiments of this application provide a method for calculating the efficiency of a compressed air energy storage system. The method includes: determining the energy storage power received by the compressed air energy storage system during energy storage based on the rated operating parameters of the compressed air energy storage system; determining the energy release power released by the compressed air energy storage system during energy release based on the rated operating parameters of the compressed air energy storage system; and determining the operating efficiency of the compressed air energy storage system based on the energy storage power and the energy release power.

[0067] In this embodiment, the energy storage power and energy release power can be determined based on the rated operating parameters of the compressed air energy storage system without considering the system's operating conditions. This reduces the computational complexity of the energy storage power and energy release power, increases the calculation speed for determining the energy storage power and energy release power, and further improves the calculation speed for increasing the operating efficiency of the compressed air energy storage system.

[0068] The following details the specific implementation of the compressed air energy storage system efficiency calculation method in the embodiments of this application.

[0069] It is understood that in the embodiments of this application, the executing entity may perform some or all of the steps in the embodiments of this application. These steps or operations are merely examples, and the embodiments of this application may also perform other operations or variations thereof. Furthermore, the various steps may be executed in different orders as presented in the embodiments of this application, and it is not necessarily necessary to execute all the operations in the embodiments of this application.

[0070] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device capable of performing the above functions. The following description uses an electronic device as an example to illustrate this embodiment and the subsequent embodiments.

[0071] It should be noted that the message names between devices or the names of parameters in the messages in the embodiments of this application are just examples. In specific implementations, other names may also be used. This application does not specifically limit this.

[0072] The following is combined with Figures 2 to 5 The technical solutions of this application will be described in detail with specific method embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0073] For example, Figure 2 This is a flowchart illustrating a method for calculating the efficiency of a compressed air energy storage system, as provided in an embodiment of this application.

[0074] In some embodiments, refer to Figure 2 As shown, the method for calculating the efficiency of this compressed air energy storage system may specifically include the following steps:

[0075] S10. Determine the energy storage power based on the rated operating parameters of the compressed air energy storage system.

[0076] Based on the rated operating parameters of the compressed air energy storage system, determine the energy storage power received by the compressed air energy storage system during energy storage.

[0077] In this embodiment of the application, during the normal operation of the compressed air energy storage system, the energy storage process is performed first. During the energy storage process, relevant parameters of the air in the storage chamber are acquired, and then the energy storage power received by the compressed air energy storage system during energy storage is determined based on the rated operating parameters of the compressed air energy storage system.

[0078] In this application embodiment, "air" refers to the air in the air storage chamber of the compressed air energy storage system. It can be understood that the relevant parameters of the air refer to the relevant parameters of the air in the air storage chamber of the compressed air energy storage system.

[0079] S20. Determine the energy release power based on the rated operating parameters of the compressed air energy storage system.

[0080] Based on the rated operating parameters of the compressed air energy storage system, determine the energy release power of the compressed air energy storage system during energy release.

[0081] In this embodiment of the application, during the normal operation of the compressed air energy storage system, after the energy storage process, the compressed air energy storage system can perform an energy release process. During the energy release process, relevant parameters of the air in the storage chamber are acquired, and then, based on the rated operating parameters of the compressed air energy storage system, the energy release power released by the compressed air energy storage system during energy release is determined.

[0082] S30. Determine the working efficiency of the compressed air energy storage system based on the energy storage power and the energy release power.

[0083] After determining the energy storage capacity and energy release capacity, the operating efficiency of the compressed air energy storage system can be determined based on these values.

[0084] In this embodiment, the operating efficiency of the compressed air energy storage system can be determined based on the ratio of the released energy power to the stored energy power. For example, if the released energy power POW2 is 15.84MW and the stored energy power is 26.99MW, then the operating efficiency η3 of the compressed air energy storage system can be calculated as follows:

[0085] eta3=POW2 / POW1=15.84MW / 26.99MW=0.587.

[0086] In this embodiment of the application, the working efficiency of the compressed air energy storage system can be calculated based on the following rated parameters of the compressed air energy storage system:

[0087] 1. Isentropic efficiency and compression ratio / expansion ratio of each stage of compressor / expander;

[0088] 2. Heat exchanger performance parameters, such as the relationship between water flow rate and gas flow rate, and the correspondence between water temperature change and gas pressure loss;

[0089] 3. Gas storage chamber performance parameters, such as chamber size, heat loss coefficient, and storage time. Other parameters may also be included, but specific details are not limited here.

[0090] In this embodiment, the energy storage power and energy release power can be determined based on the rated operating parameters of the compressed air energy storage system without considering the system's operating conditions. This reduces the computational complexity of the energy storage power and energy release power, increases the calculation speed for determining the energy storage power and energy release power, and further improves the calculation speed for increasing the operating efficiency of the compressed air energy storage system.

[0091] In some embodiments, refer to Figure 3 The above step S10 includes the following steps S101 and S102:

[0092] S101. Determine the air parameters before and after energy storage.

[0093] Determine the air parameters in the air storage chamber of the compressed air energy storage system before and after energy storage.

[0094] In this embodiment, the air parameters may include air pressure, air temperature, and other parameters. Therefore, the air parameters before energy storage may include the air pressure and air temperature before energy storage, and the air parameters after energy storage may include the air pressure and air temperature after energy storage.

[0095] S102. Calculate the energy storage power based on the air parameters before and after energy storage.

[0096] After determining the air parameters before and after energy storage, the energy storage power of the compressed air energy storage system during the energy storage operation phase is calculated based on the rated operating parameters of the compressed air energy storage system.

[0097] In this embodiment, the rated parameters of the compressed air energy storage system may include the isentropic efficiency and compression ratio of each stage of the compressor; the isentropic efficiency and compression ratio / expansion ratio of the expander; the water-gas flow rate relationship of the heat exchanger, and the correspondence between water temperature change and gas pressure loss; the size of the gas storage chamber, heat loss coefficient, and gas storage time. Other parameters may also be included, but are not limited here.

[0098] This embodiment provides a method for calculating energy storage power. It first obtains the air parameters before and after energy storage, and then calculates the energy storage power of the compressed air energy storage system during the energy storage operation phase based on the rated operating parameters of the compressed air energy storage system. This reduces the computational complexity of energy storage power and improves the calculation speed. Simultaneously, it also provides a method for determining energy storage power, improving the feasibility of this embodiment.

[0099] In some embodiments, the air parameters before energy storage may include the air pressure and temperature before compression cooling, and the air parameters after compression cooling may include the air pressure and temperature after compression cooling, as well as the pressure loss value and temperature drop value during compression cooling. Step S101 may specifically include:

[0100] The air pressure after compression cooling is determined based on the air pressure before compression cooling, the compressor's compression ratio, and the pressure loss value of compression cooling; the air temperature after compression cooling is determined based on the air temperature before compression cooling, the temperature drop value of compression cooling, the compressor's rated isentropic efficiency, the air's adiabatic factor, and the compressor's compression ratio.

[0101] In this embodiment, based on the rated operating parameters of the compressed air energy storage system, the air pressure and air temperature after compression cooling can be calculated according to the air pressure before compression cooling, the air temperature before compression cooling, the air pressure loss value after compression cooling, and the temperature drop value after compression cooling.

[0102] In this embodiment, the rated parameters of the compressed air energy storage system may include the isentropic efficiency and compression ratio of each stage of the compressor; the isentropic efficiency and compression ratio / expansion ratio of the expander; the water-gas flow rate relationship of the heat exchanger, and the correspondence between water temperature change and gas pressure loss; the size of the gas storage chamber, heat loss coefficient, and gas storage time. Other parameters may also be included, but are not limited here.

[0103] In this embodiment, determining the air parameters in the air storage chamber of the compressed air energy storage system before and after energy storage can include: determining the air pressure after compression cooling based on the air pressure before compression cooling, the compression ratio of the compressor, and the pressure loss value of compression cooling; and determining the air temperature after compression cooling based on the air temperature before compression cooling, the temperature drop value of compression cooling, the rated isentropic efficiency of the compressor, the adiabatic factor of the air, and the compression ratio of the compressor.

[0104] Specifically, before the compressed air energy storage system performs compression cooling on the air in its storage chamber, the air temperature in the storage chamber is T1, the pressure is P1, the isentropic efficiency of the compressor in the compressed air energy storage system is η1, and the compression ratio is α. After compression cooling, the air pressure loss in the storage chamber is dP, and the air temperature decrease is dT. From this, we can calculate:

[0105] The air pressure after compression and cooling is P2 = the air pressure before compression and cooling * compression ratio - pressure loss = P1 * α - dP;

[0106] Air temperature after compression cooling K is the adiabatic factor of air.

[0107] For example, in the compressed air energy storage system, the isentropic efficiency of the four-stage compression is 84%, and the compression ratio is 3; the isentropic efficiency of the three-stage expansion system is 88%, and the compression ratio is 2.7. During heat exchange, the water and air flow velocities are the same at 25 kg / s; the temperature change of water and air is inversely proportional to the heat capacity; for every 5 K change in water temperature, the air pressure loss is 0.02 MPa. The air storage chamber is a sphere with a radius of 10 m, exhibiting isothermal heat release, with a heat loss coefficient of 34.4 W / (m³). 2 Under the condition of K), the compressed air energy storage system performs four-stage compression cooling on the air. Before compression cooling, the air temperature in the storage chamber is 298.15 K and the pressure is 0.10 MPa. After four-stage compression cooling, the air temperature in the storage chamber is 1121.07 K and the pressure is 7.30 MPa. See Table 1 for details.

[0108] Before compression 298.15 0.10 After stage 1 compression intercooling 408.03 0.28 3.90 After 2-stage compression and intercooling 566.14 0.82 9.23 After 3-stage compression and intercooling 793.67 2.44 16.62 After 4-stage compression and intercooling 1121.07 7.30 26.99

[0109] Table 1

[0110] In this embodiment, the energy storage power can be determined based on the rated operating parameters of the compressed air energy storage system without considering the system's operating conditions. This reduces the computational complexity of the energy storage power and increases the calculation speed for determining the energy storage power. Furthermore, it improves the calculation speed for increasing the operating efficiency of the compressed air energy storage system and reduces the computational complexity of the operating efficiency of the compressed air energy storage system.

[0111] In some embodiments, step S102 may specifically include:

[0112] The energy storage power is determined based on the air temperature after compression and cooling, the air pressure after compression and cooling, the air velocity, the air heat capacity, and the isentropic efficiency of the compressor.

[0113] After determining the air parameters before and after energy storage in step S101, these parameters include the air pressure and temperature after compression cooling, as well as the pressure loss and temperature drop during compression cooling. Based on this, the power consumed by the external environment for the compressed air energy storage system can be calculated; that is, the power received by the compressed air energy storage system from external devices, i.e., the energy storage power, is:

[0114] POW1 = (T2 + dT - T1) * n * C / η1, where T2 is the air temperature after compression cooling, dT is the air temperature reduction, T1 is the air temperature before compression cooling, n is the air velocity, C is the heat capacity of air, and η1 is the isentropic efficiency of the compressor in the compressed air energy storage system.

[0115] For example, as shown in Table 1 above, before the air in the storage chamber is compressed and cooled, the air temperature is 298.15 K and the pressure is 0.10 MPa. After four stages of compression and cooling, the air temperature in the storage chamber is 1121.07 K and the pressure is 7.30 MPa. Based on this, the energy storage power POW1 can be calculated to be 26.99 MW.

[0116] In this embodiment, the energy release power can be determined based on the rated operating parameters of the compressed air energy storage system without considering the system's operating conditions. This reduces the computational complexity of the energy release power calculation, increases the calculation speed for determining the energy release power, and further improves the calculation speed for increasing the operating efficiency of the compressed air energy storage system, while reducing the computational complexity of the operating efficiency calculation. Furthermore, a method for determining the energy storage power is specifically provided, improving the feasibility of the embodiments in this application.

[0117] In some embodiments, refer to Figure 4 The above step S20 includes the following steps S201 and S02:

[0118] S201: Determine the air parameters before and after energy release.

[0119] Determine the air parameters in the compressed air energy storage system's storage chamber before and after energy release.

[0120] In this embodiment, the air parameters may include air pressure, air temperature, and other parameters. Therefore, the air parameters before energy release may include the air pressure and air temperature before energy release, and the air parameters after energy release may include the air pressure and air temperature after energy release.

[0121] S202: Calculate the energy release power based on the air parameters before and after energy release.

[0122] After determining the air parameters before and after energy release, the energy release power of the compressed air energy storage system during the energy release phase is calculated based on the rated operating parameters of the compressed air energy storage system.

[0123] In this embodiment, the rated parameters of the compressed air energy storage system may include the isentropic efficiency and compression ratio of each stage of the compressor; the isentropic efficiency and compression ratio / expansion ratio of the expander; the water-gas flow rate relationship of the heat exchanger, and the correspondence between water temperature change and gas pressure loss; the size of the gas storage chamber, heat loss coefficient, and gas storage time. Other parameters may also be included, but are not limited here.

[0124] This embodiment provides a method for calculating energy release power. It first obtains the air parameters before and after energy release, and then calculates the energy release power of the compressed air energy storage system during the energy release phase based on the system's rated operating parameters. This reduces the computational complexity of energy release power calculation and increases its speed. Furthermore, it provides a method for determining energy release power, improving the feasibility of this embodiment.

[0125] In some embodiments, refer to Figure 4 The air parameters before energy release may include the air pressure and temperature before regenerative expansion, and the air parameters after regenerative expansion may include the air pressure and temperature after regenerative expansion, as well as the pressure loss and temperature drop during regenerative expansion. Step S201 specifically may include:

[0126] The air pressure after regenerative expansion is determined based on the air pressure before regenerative expansion, the rated expansion ratio of the expander, and the pressure loss value during regenerative expansion; the air temperature after regenerative expansion is determined based on the air temperature before regenerative expansion, the temperature drop during regenerative expansion, the rated isentropic efficiency of the compressor, the adiabatic factor of the air, and the compression ratio of the compressor.

[0127] In this embodiment, based on the rated operating parameters of the compressed air energy storage system, the air pressure and air temperature after thermal expansion can be calculated according to the air pressure before thermal expansion, the air temperature before thermal expansion, the increase in air pressure during thermal expansion, and the increase in temperature during thermal expansion.

[0128] In this embodiment, the rated parameters of the compressed air energy storage system may include the isentropic efficiency and compression ratio of each stage of the compressor; the isentropic efficiency and compression ratio / expansion ratio of the expander; the water-gas flow rate relationship of the heat exchanger, and the correspondence between water temperature change and gas pressure loss; the size of the gas storage chamber, heat loss coefficient, and gas storage time. Other parameters may also be included, but are not limited here.

[0129] In this embodiment of the application, determining the air parameters in the air storage chamber of the compressed air energy storage system before and after energy release may include: determining the air pressure after regenerative expansion based on the air pressure before regenerative expansion, the compression ratio of the expander, and the pressure loss value during regenerative expansion; and determining the air temperature after regenerative expansion based on the air temperature before regenerative expansion, the temperature drop value during regenerative expansion, the rated isentropic efficiency of the expander, the adiabatic factor of the air, and the compression ratio of the expander.

[0130] Specifically, before regenerative expansion, the air temperature is T3 and the pressure is P3. After regeneration, the increase in air pressure is dP and the increase in air temperature is dT. The isentropic efficiency of the expander is η2, and the expansion ratio is β. From this, we can calculate:

[0131] The air pressure P4 after thermal expansion is: P4=(P3+dP)*β;

[0132] The temperature T4 of the air after thermal expansion is:

[0133] For example, as shown in Table 2, the isentropic efficiency of the four-stage compression system in the compressed air energy storage system is 84%, and the compression ratio is 3. The isentropic efficiency of the three-stage expansion system is 88%, and the compression ratio is 2.7. During the heat exchange process, the water and air flow velocities are the same at 25 kg / s. The change in water and air temperature is inversely proportional to the heat capacity, and the air pressure loss is 0.02 MPa for every 5 K change in water temperature. The air storage chamber is a sphere with a radius of 10 m, and it releases heat isothermally with a heat loss coefficient of 34.4 W / (m³). 2 Under the condition of K), the compressed air energy storage system performs three-stage regenerative expansion of the air. Before the regenerative expansion, the air temperature in the storage chamber is 1100.07K and the pressure is 2.07MPa; after the three-stage regenerative expansion, the air temperature in the storage chamber is 443.07K and the pressure is 0.09MPa.

[0134] Before expansion 1100.07 2.07 After first-stage regenerative expansion 806.31 0.78 6.92 After stage 2 regenerative expansion 595.03 0.28 12.03 After 3-stage regenerative expansion 443.07 0.09 15.84

[0135] Table 3

[0136] In some embodiments, corresponding to step S201 above, step S202 may specifically include:

[0137] The energy storage power is determined based on the air temperature after regenerative expansion, the air pressure after regenerative expansion, the air velocity, the air heat capacity, and the isentropic efficiency of the compressor.

[0138] After determining the air parameters before and after energy release in step S101, the air parameters before and after energy release include the air pressure and air temperature after compression cooling, as well as the air pressure loss value and temperature drop value of compression cooling.

[0139] Then, the power consumed by the external environment for the compressed air energy storage system can be calculated, that is, the power received by the compressed air energy storage system from the external device, i.e., the released energy power, is:

[0140] POW2 = (T4 - T3 - dT) * n * C * η2, where T4 is the temperature of the air after regenerative expansion, T3 is the temperature of the air before regenerative expansion, dT is the temperature increase after regenerative expansion, n is the air velocity, C is the heat capacity of the air, and η2 is the isentropic efficiency of the expander in the compressed air energy storage system.

[0141] For example, as shown in Table 1, the compressed air energy storage system performs three stages of regenerative expansion on the air. Before the regenerative expansion, the air temperature in the storage chamber is 1100.07 K and the pressure is 2.07 MPa; after the three stages of regenerative expansion, the air temperature in the storage chamber is 443.07 K and the pressure is 0.09 MPa. Based on this, the energy release power POW2 can be calculated to be 15.84 MW.

[0142] This embodiment provides a method for calculating energy release power. It first obtains the air parameters before and after energy release, and then calculates the energy release power of the compressed air energy storage system during the energy release phase based on the system's rated operating parameters. This reduces the computational complexity of energy release power calculation and increases its speed. Furthermore, it provides a method for determining energy release power, improving the feasibility of this embodiment.

[0143] In this embodiment, the energy storage power and energy release power can be determined based on the rated operating parameters of the compressed air energy storage system without considering the system's operating conditions, thus enabling a quick and simple determination of the compressed air energy storage system's operating efficiency. It is understood that other parameter information of the compressed air energy storage system can also be quickly and easily determined based on its rated operating parameters. For example, in the workflow of the compressed air energy storage system, the air pressure after heat recovery can also be calculated based on the rated operating parameters of the compressed air energy storage system.

[0144] In some embodiments, refer to Figure 5 The above method may further include step S40:

[0145] S40. Calculate the air pressure after heat recovery based on the rated operating parameters of the compressed air energy storage system.

[0146] Based on the rated operating parameters of the compressed air energy storage system, the air pressure after heat recovery is calculated according to the air parameters before heat recovery.

[0147] In this embodiment, the rated parameters of the compressed air energy storage system may include the isentropic efficiency and compression ratio of each stage of the compressor; the isentropic efficiency and compression ratio / expansion ratio of the expander; the water-gas flow rate relationship of the heat exchanger, and the correspondence between water temperature change and gas pressure loss; the size of the gas storage chamber, heat loss coefficient, and gas storage time. Other parameters may also be included, but are not limited here.

[0148] In this embodiment, the air pressure of the compressed air energy storage system after heat recovery is calculated based on the rated operating parameters of the compressed air energy storage system, thereby reducing the computational complexity and improving the computational speed.

[0149] In some embodiments, step S40 specifically includes:

[0150] The air pressure after heat recovery is determined based on the air pressure before heat recovery, the air temperature before heat recovery, the storage time, the surface area of ​​the air storage chamber, the volume of the air storage chamber, and the rated heat loss coefficient of the air storage chamber.

[0151] Specifically, before storing air after cooling in the compression chamber, a heat recovery operation involving cooling and depressurization is required. During storage, the air releases heat isothermally. The air pressure P6 after storage can be calculated based on the air temperature T5 before heat recovery, the air pressure P5 before heat recovery, the storage time t, the surface area S of the storage chamber, the volume V of the storage chamber, the room temperature Troom, and the rated heat loss coefficient w of the storage chamber.

[0152] P6 = P5 - (T5 - Troom) * S * w * t / V.

[0153] For example, as shown in Table 3, the isentropic efficiency of the four-stage compression system in the compressed air energy storage system is 84%, and the compression ratio is 3. The isentropic efficiency of the three-stage expansion system is 88%, and the compression ratio is 2.7. During the heat exchange process, the water and air flow velocities are the same at 25 kg / s. The change in water and air temperature is inversely proportional to the heat capacity, and the air pressure loss is 0.02 MPa for every 5 K change in water temperature. The air storage chamber is a sphere with a radius of 10 m, and it releases heat isothermally with a heat loss coefficient of 34.4 W / (m³). 2 Under the condition of K), before the compressed air energy storage system stores air, the air pressure P5 before heat recovery is 6.54 MPa, and the air temperature before heat recovery is 323.07 K; the air pressure P6 after heat recovery is 2.81 MPa.

[0154] Understandably, after calculating the air pressure after storage, it can be determined whether the air pressure after storage meets the preset conditions, thereby adjusting the operating parameters of the compressed air energy storage system.

[0155] Before gas storage 323.07 6.54 After gas storage 323.07 2.81

[0156] Table 3

[0157] In this embodiment, the air pressure of the compressed air energy storage system after heat recovery is calculated based on the rated operating parameters of the compressed air energy storage system, thereby reducing computational complexity and improving computational speed. Furthermore, a method for calculating the air pressure of the compressed air energy storage system after heat recovery is specifically provided, improving the feasibility of this embodiment.

[0158] In some embodiments, the compressor of the compressed air energy storage system is a multi-stage compressor, and the expander of the compressed air energy storage system is a multi-stage expander.

[0159] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 6 As shown, the electronic device 600 includes:

[0160] The first determining module 601 is used to determine the energy storage power received by the compressed air energy storage system during energy storage based on the rated operating parameters of the compressed air energy storage system.

[0161] The second determining module 602 is used to determine the energy release power released by the compressed air energy storage system during energy release based on the rated operating parameters of the compressed air energy storage system.

[0162] The third determining module 603 is used to determine the working efficiency of the compressed air energy storage system based on the energy storage power and the energy release power.

[0163] In one possible implementation, the first determining module 601 is specifically used to: determine the air parameters of the compressed air energy storage system before energy storage and the air parameters after energy storage; and calculate the energy storage power based on the rated operating parameters of the compressed air energy storage system and the air parameters before and after energy storage.

[0164] In one possible implementation, the air parameters include the air temperature before compression cooling, the air pressure before compression cooling, the pressure loss value during compression cooling, and the temperature drop value during compression cooling. The compressed air energy storage system includes a compressor. The first determining module 601 is specifically used to: determine the air pressure after compression cooling based on the air pressure before compression cooling, the compressor's compression ratio, and the pressure loss value during compression cooling; determine the air temperature after compression cooling based on the air temperature before compression cooling, the temperature drop value during compression cooling, the compressor's rated isentropic efficiency, the air's adiabatic factor, and the compressor's compression ratio; and determine the energy storage power based on the air temperature after compression cooling, the air pressure after compression cooling, the air velocity, the air's heat capacity, and the compressor's isentropic efficiency.

[0165] In one possible implementation, the second determining module 602 is specifically used to: determine the air parameters of the compressed air energy storage system before and after energy release; and calculate the energy release power based on the rated operating parameters of the compressed air energy storage system and the air parameters before and after energy release.

[0166] In one possible implementation, the air parameters include the air temperature before regenerative expansion, the air pressure before regenerative expansion, the pressure increase during regenerative expansion, and the temperature rise during regenerative expansion. The compressed air energy storage system includes an expander. The second determining module 602 is specifically used to: determine the air pressure after regenerative expansion based on the air pressure before regenerative expansion, the rated expansion ratio of the expander, and the pressure loss during regenerative expansion; determine the air temperature after regenerative expansion based on the air temperature before regenerative expansion, the temperature drop during regenerative expansion, the rated isentropic efficiency of the compressor, the adiabatic factor of the air, and the compression ratio of the compressor; and determine the energy storage power based on the air temperature after regenerative expansion, the air pressure after regenerative expansion, the air velocity, the heat capacity of the air, and the isentropic efficiency of the compressor.

[0167] In one possible implementation, the electronic device 600 further includes:

[0168] The fourth determining module 604 is used to calculate the air pressure after heat recovery based on the rated operating parameters of the compressed air energy storage system and the air parameters before heat recovery.

[0169] In one possible implementation, the fourth determining module 604 is specifically used to determine the air pressure after heat recovery based on the air pressure before heat recovery, the air temperature before heat recovery, the storage time, the surface area of ​​the air storage chamber, the volume of the air storage chamber, and the rated heat loss coefficient of the air storage chamber.

[0170] In one possible implementation, the compressor is a multi-stage compressor and the expander is a multi-stage expander.

[0171] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 7 As shown, the electronic device 700 includes one or more processors 701, communication lines 702 and communication interfaces 703. Optionally, the electronic device 700 also includes a memory 704.

[0172] In some implementations, memory 704 stores elements such as executable modules or data structures, or subsets thereof, or extended sets thereof.

[0173] The methods described in the embodiments of this application can be applied to processor 701, or implemented by processor 701. Processor 701 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuit in the hardware of processor 701 or by instructions in software form. The processor 701 may be a general-purpose processor (e.g., a microprocessor or conventional processor), a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gates, transistor logic devices, or discrete hardware components. Processor 701 can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application.

[0174] The steps of the method disclosed in the embodiments of this application can be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules can be located in mature storage media in the art, such as random access memory, read-only memory, programmable read-only memory, or electrically erasable programmable read-only memory (EEPROM). This storage medium is located in memory 704, and processor 701 reads the information in memory 704 and, in conjunction with its hardware, completes the steps of the above method.

[0175] The processor 701, memory 704 and communication interface 703 can communicate with each other through communication line 702.

[0176] In the above embodiments, the instructions stored in the memory for execution by the processor can be implemented in the form of a computer program product. This computer program product can be pre-written into the memory, or it can be downloaded and installed into the memory as software.

[0177] This application also provides a computer program product comprising one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the process or function performed by the electronic device or electronic device according to the embodiments of this application is generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions may be transmitted from one website satellite constellation, computer, server, or data center to another website satellite constellation, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a server or data center that integrates one or more available media. For example, available media may include magnetic media (e.g., floppy disk, hard disk, or magnetic tape), optical media (e.g., digital versatile disc (DVD)), or semiconductor media (e.g., solid-state disk (SSD)).

[0178] This application provides an electronic device, which includes a processor and a memory. The memory stores a computer program, and the processor executes the computer program to perform the above-described method for calculating the efficiency of a compressed air energy storage system.

[0179] This application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program or instructions. When executed by a processor, the computer program or instructions implement the methods performed by the aforementioned base station or electronic device. The methods described in the above embodiments can be implemented wholly or partially by software, hardware, firmware, or any combination thereof. If implemented in software, the functionality can be stored as one or more instructions or code on or transmitted over the computer-readable medium. The computer-readable medium can include computer storage media and communication media, and can also include any medium that can transfer a computer program from one place to another. The storage medium can be any target medium accessible by a computer.

[0180] As one possible design, computer-readable media may include compact disc read-only memory (CD-ROM), RAM, ROM, EEPROM, or other optical disc storage; computer-readable media may include disk storage or other disk storage devices. Furthermore, any connecting cable may also be appropriately referred to as computer-readable media. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of media. As used herein, disks and optical discs include optical discs (CD), laser discs, optical discs, DVDs, floppy disks, and Blu-ray discs, where disks typically reproduce data magnetically, while optical discs optically reproduce data using lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0181] This application describes embodiments with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processing unit of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processing unit of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0182] The above specific embodiments further illustrate the purpose, technical solution and beneficial effects of this application. It should be understood that the above are only specific embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solution of this application should be included within the scope of protection of this application.

Claims

1. A method for calculating the efficiency of a compressed air energy storage system, characterized in that, The method includes: Determine the air temperature before compression cooling, the air pressure loss during compression cooling, and the temperature drop during compression cooling of the compressed air energy storage system. The compressed air energy storage system includes a compressor during energy storage. The air temperature after compression cooling is determined based on the air temperature before compression cooling, the temperature drop during compression cooling, the isentropic efficiency of the compressor, the adiabatic factor of the air, and the compression ratio of the compressor. The energy storage power received by the compressed air energy storage system during energy storage is determined based on the air temperature after compression and cooling, the air temperature before compression and cooling, the temperature drop value of compression and cooling, the air flow rate, the heat capacity of the air, and the isentropic efficiency of the compressor. Based on the rated operating parameters of the compressed air energy storage system, determine the energy release power released by the compressed air energy storage system during energy release. The compressed air energy storage system includes an expander during energy release. The operating efficiency of the compressed air energy storage system is determined based on the energy storage power and the energy release power.

2. The method according to claim 1, characterized in that, Determining the energy release power of the compressed air energy storage system during energy release includes: Determine the air parameters of the compressed air energy storage system before and after energy release; The energy release power is calculated based on the rated operating parameters of the compressed air energy storage system, the air parameters before energy release, and the air parameters after energy release.

3. The method according to claim 2, characterized in that, The air parameters include the air temperature before regenerative expansion, the increase in air pressure during regenerative expansion, and the increase in temperature during regenerative expansion. The calculation of the energy release power based on the rated operating parameters of the compressed air energy storage system, the air parameters before energy release, and the air parameters after energy release includes: The air temperature after regenerative expansion is determined based on the air temperature before regenerative expansion, the temperature rise during regenerative expansion, the isentropic efficiency of the expander, the adiabatic factor of the air, and the rated expansion ratio of the expander. The formula for calculating the released power POW2 is: POW2 = (T4 - T3 - dT) n C η2 Wherein, T4 is the air temperature after the regenerative expansion, T3 is the air temperature before the regenerative expansion, dT is the temperature increase after the regenerative expansion, n is the air mass flow rate, C is the heat capacity of air, and η2 is the isentropic efficiency of the expander.

4. The method according to claim 3, characterized in that, The method further includes: Based on the rated operating parameters of the compressed air energy storage system, the air pressure after heat recovery is calculated according to the air parameters before heat recovery.

5. The method according to claim 4, characterized in that, The calculation of the air pressure after heat recovery based on the rated operating parameters of the compressed air energy storage system includes: The air pressure after heat recovery is determined based on the air pressure before heat recovery, the air temperature before heat recovery, the room temperature, the storage time, the surface area of ​​the air storage chamber, the volume of the air storage chamber, and the rated heat loss coefficient of the air storage chamber.

6. An electronic device, characterized in that, The electronic device includes: The first determining module is used to determine the air temperature before compression cooling, the air pressure loss value during compression cooling, and the temperature drop value during compression cooling of the compressed air energy storage system. The compressed air energy storage system includes a compressor during energy storage. The module determines the air temperature after compression cooling based on the air temperature before compression cooling, the temperature drop value during compression cooling, the isentropic efficiency of the compressor, the adiabatic factor of the air, and the compression ratio of the compressor. The module also determines the energy storage power received by the compressed air energy storage system during energy storage based on the air temperature after compression cooling, the air temperature before compression cooling, the temperature drop value during compression cooling, the air velocity, the heat capacity of the air, and the isentropic efficiency of the compressor. The second determining module is used to determine the energy release power released by the compressed air energy storage system during energy release based on the rated operating parameters of the compressed air energy storage system, wherein the compressed air energy storage system includes an expander during energy release. The third determining module is used to determine the working efficiency of the compressed air energy storage system based on the energy storage power and the energy release power.

7. An electronic device, characterized in that, It includes a memory and a processor, the memory being used to store a computer program, and the processor being used to invoke the computer program to execute the compressed air energy storage system efficiency calculation method as described in any one of claims 1 to 5.

8. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the compressed air energy storage system efficiency calculation method as described in any one of claims 1 to 5.

9. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the method for calculating the efficiency of a compressed air energy storage system as described in any one of claims 1 to 5.

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