Compressed air energy storage system efficiency calculation method and equipment

Abstract

The embodiment of the invention provides a compressed air energy storage system efficiency calculation method and equipment, and is applied to the field of energy storage. The method comprises the steps of determining energy storage power received by the compressed air energy storage system during energy storage based on rated working parameters of the compressed air energy storage system; determining 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 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, and the working condition of the system does not need to be considered, so that the calculation speed of the working efficiency of the compressed air energy storage system is increased, and the calculation complexity of the working efficiency of the compressed air energy storage system is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of energy storage, in particular to a compressed air energy storage system efficiency calculation method and device. BACKGROUND

[0002] With the development of global energy structure towards sustainability and diversification, compressed air energy storage technology shows great application potential.

[0003] In the prior art, it is difficult to calculate the working efficiency of the compressed air energy storage system. Especially when calculating the efficiency, the working efficiency calculation is complex and slow because the working conditions of each system accessory of the compressed air energy storage system deviate from the rated working state.

[0004] Therefore, it is an urgent problem to be solved to provide a simple and fast compressed air energy storage system efficiency calculation method. SUMMARY

[0005] The embodiments of the present application provide a compressed air energy storage system efficiency calculation method and device, which determines the working efficiency of the compressed air energy storage system based on the rated working parameters of the compressed air energy storage system, reduces the complexity of the working efficiency calculation of the compressed air energy storage system, and improves the speed of the working efficiency calculation of the compressed air energy storage system.

[0006] In a first aspect, the embodiments of the present application provide a compressed air energy storage system efficiency calculation method, which comprises: 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.

[0007] Based on the above technical solution, the energy storage power and the energy release power can be determined based on the rated working parameters of the compressed air energy storage system, without considering the working conditions of the system, thereby reducing the calculation complexity of the energy storage power and the energy release power, improving the calculation speed of the energy storage power and the energy release power, further improving the calculation speed of the working efficiency of the compressed air energy storage system, and reducing the calculation complexity of the working efficiency of the compressed air energy storage system.

[0008] In an embodiment, 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 comprises: determining the air parameters before energy storage and the air parameters after energy storage of the compressed air energy storage system; and calculating the energy storage power based on the rated working parameters of the compressed air energy storage system and according to the air parameters before energy storage and the air parameters after energy storage.

[0009] In the embodiment, the energy storage power can be determined based on the rated working parameters of the compressed air energy storage system, without considering the working condition of the system, so as to reduce the calculation complexity of the energy storage power, improve the calculation speed of the energy storage power, further improve the calculation speed of the working efficiency of the compressed air energy storage system, and reduce the calculation complexity of the working efficiency of the compressed air energy storage system.

[0010] In an embodiment, the air parameters include air temperature before inter-stage cooling, air pressure before inter-stage cooling, air pressure loss value of inter-stage cooling, and temperature drop value of inter-stage cooling, and the compressed air energy storage system includes a compressor. The energy storage power is calculated according to the air parameters before energy storage and the air parameters after energy storage, including: determining the air pressure after inter-stage cooling according to the air pressure before inter-stage cooling, the compression ratio of the compressor, and the air pressure loss value of inter-stage cooling; determining the air temperature after inter-stage cooling according to the air temperature before inter-stage cooling, the temperature drop value of inter-stage cooling, the rated isentropic efficiency of the compressor, the adiabatic factor of air, and the compression ratio of the compressor; and determining the energy storage power according to the air temperature after inter-stage cooling, the air pressure after inter-stage cooling, the flow rate of air, the heat capacity of air, and the isentropic efficiency of the compressor.

[0011] In the embodiment, the energy storage power can be determined based on the rated working parameters of the compressed air energy storage system, without considering the working condition of the system, so as to reduce the calculation complexity of the energy storage power, improve the calculation speed of the energy storage power, further improve the calculation speed of the working efficiency of the compressed air energy storage system, and reduce the calculation complexity of the working efficiency of the compressed air energy storage system. Meanwhile, a method for determining the energy storage power is provided, and the realizability of the embodiment is improved.

[0012] In an embodiment, the energy release power of the compressed air energy storage system during energy release is determined, including: determining air parameters before energy release and air parameters after energy release of the compressed air energy storage system; and calculating the energy release power based on the rated working parameters of the compressed air energy storage system according to the air parameters before energy release and the air parameters after energy release.

[0013] In the embodiment, the energy release power can be determined based on the rated working parameters of the compressed air energy storage system, without considering the working condition of the system, so as to reduce the calculation complexity of the energy release power, improve the calculation speed of the energy storage power, further improve the calculation speed of the working efficiency of the compressed air energy storage system, and reduce the calculation complexity of the working efficiency of the compressed air energy storage system.

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

[0015] In the embodiment, the energy release power can be 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 complexity of the energy release power is reduced, the calculation speed of the energy storage power is improved, the calculation speed of the working efficiency of the compressed air energy storage system is further improved, and the calculation complexity of the working efficiency of the compressed air energy storage system is reduced. Meanwhile, the method for determining the energy release power is provided, and the realizability of the embodiment is improved.

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

[0017] In the embodiment, the air pressure after heat recovery of the compressed air energy storage system is calculated based on the rated working parameters of the compressed air energy storage system, so that the calculation complexity is reduced and the calculation speed is improved.

[0018] In an embodiment, the calculation of the air temperature after heat recovery based on the rated working parameters of the compressed air energy storage system includes: determining the air pressure after heat recovery according to the air pressure before heat recovery, the air temperature before heat recovery, the storage time, the surface area of the gas storage chamber, the volume of the gas storage chamber and the rated heat loss coefficient of the gas storage chamber.

[0019] In the embodiment, the air pressure after heat recovery of the compressed air energy storage system is calculated based on the rated working parameters of the compressed air energy storage system, so that the calculation complexity is reduced and the calculation speed is improved. Meanwhile, the method for calculating the air pressure after heat recovery of the compressed air energy storage system is provided, and the realizability of the embodiment is improved.

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

[0021] In a second aspect, an electronic device is provided, which includes a processor and a memory. The processor is coupled to the memory. The memory is configured to store computer instructions. The computer instructions are loaded and executed by the processor to enable the electronic device to implement any of the methods provided in the first aspect.

[0022] In a third aspect, a chip is provided, which includes a processor and an interface circuit. The interface circuit is configured to receive code instructions and transmit the code instructions to the processor. The processor is configured to execute the code instructions to implement any of the methods provided in the first aspect.

[0023] In a fourth aspect, a computer readable storage medium is provided, which stores at least one computer program instruction. The computer program instruction is loaded and executed by a processor to implement any of the methods provided in the first aspect.

[0024] In a fifth aspect, a computer program product is provided, which includes computer execution instructions. When the computer execution instructions are executed on a computer, the computer is enabled to implement any of the methods provided in the first aspect.

[0025] The possible implementation manners of the second aspect to the fifth aspect have similar effects to those of the first aspect and the possible designs of the first aspect, and thus will not be described herein. BRIEF DESCRIPTION OF DRAWINGS

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

[0027] Figure 2 FIG. 2 is a flowchart of a compressed air energy storage system efficiency calculation method provided in an embodiment of the present application;

[0028] Figure 3 FIG. 3 is a flowchart of another compressed air energy storage system efficiency calculation method provided in an embodiment of the present application;

[0029] Figure 4 FIG. 4 is a flowchart of another compressed air energy storage system efficiency calculation method provided in an embodiment of the present application;

[0030] Figure 5 FIG. 5 is a flowchart of another compressed air energy storage system efficiency calculation method provided in an embodiment of the present application;

[0031] Figure 6 FIG. 6 is a structural schematic diagram of an electronic device provided in an embodiment of the present application;

[0032] Figure 7 FIG. 7 is a structural schematic diagram of another electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described below with reference to the drawings.

[0034] In the description of the present application, unless otherwise specified, " / " means that the objects before and after the " / " are in an "or" relationship, for example, A / B can mean A or B; "and / or" in the present application is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural.

[0035] In the description of the present application, unless otherwise specified, "multiple" means two or more than two. "At least one of the following" or the like means any combination of the items, including any combination of single item or multiple items. For example, at least one of a, b, or c can mean a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0036] In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, "first", "second", etc. are used to distinguish the same items or similar items with basically the same function and effect. Those skilled in the art can understand that "first", "second", etc. do not limit the quantity and execution order, and "first", "second", etc. do not necessarily mean different.

[0037] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design presented as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or advantageous than other embodiments or design solutions. Rather, the use of "exemplary" or "for example" is intended to present concepts in a concrete manner. The use of "exemplary" or "for example" is intended to present concepts in a concrete manner.

[0038] It can be understood that "embodiments" mentioned throughout the specification mean that the specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the present application. Therefore, the various embodiments throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in any suitable manner in one or more embodiments. It can be understood that in various embodiments of the present application, the size of the sequence number of each process does not mean the execution order, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0039] It can be understood that some optional features in the embodiments of the present application can be implemented independently in some scenarios without relying on other features, such as the scheme currently based on, to solve the corresponding technical problems and achieve the corresponding effects, or can be combined with other features according to needs in some scenarios. Correspondingly, the devices given in the embodiments of the present application can also implement these features or functions, which will not be described here.

[0040] In the present application, the same or similar parts between various embodiments can be mutually referred to, unless otherwise specified. In the present application, the terms and / or descriptions between different embodiments are consistent and can be mutually referred to, unless otherwise specified and logically conflicted, and different embodiments can be combined to form new embodiments according to their inherent logical relationship. The following embodiments of the present application do not constitute a limitation on the protection scope of the present application.

[0041] The related technologies of the embodiments of the present application are described below:

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

[0043] As shown in Figure 1 , a compressed air energy storage system generally includes the following devices:

[0044] 1. Compressor.

[0045] The compressor is a key device of the compressed air energy storage system in the energy storage stage, and its function is to compress air from low pressure to high pressure. A multi-stage compressor is usually used in the compressed air energy storage system, which can gradually increase the pressure of the air and compress the air to a higher pressure. There will be a cooling device between each stage of the multi-stage compressor to reduce the temperature of the air and improve the compression efficiency. For example, a three-stage or four-stage compressor may be used in some large compressed air energy storage systems.

[0046] 2. Air storage chamber.

[0047] The air storage chamber is a device for storing high-pressure air. Common air storage chambers include underground salt caverns, abandoned mines, and high-pressure containers, etc. The underground salt cavern is a relatively ideal air storage chamber because it has good sealing performance, large volume, and low permeability. Abandoned mines can also be modified for air storage, but they need to be reinforced and sealed. If there is no suitable underground space, a high-pressure container on the ground can also be used to store air, but the cost is relatively high, and the air storage capacity is limited.

[0048] 3. Heat exchanger.

[0049] The heat exchanger is mainly used to heat the cold air coming out of the air storage chamber during the energy release phase in the compressed air energy storage system. It can utilize various heat sources, such as heat generated by natural gas combustion, industrial waste heat, or solar heat collection, to heat the cold air to an appropriate temperature, thereby improving the work efficiency of the turbine.

[0050] 4. Turbine and generator.

[0051] The turbine works during the energy release phase, using the power generated by the expansion of high-pressure air to rotate. The design of the turbine takes into account factors such as air flow, pressure, and temperature to ensure efficient conversion of the internal energy of the air into mechanical energy. The generator is connected to the turbine and converts the mechanical energy of the turbine into electrical energy.

[0052] It can be understood that other devices can also be included in the compressed air energy storage system, which are not limited here.

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

[0054] 1. Energy storage process.

[0055] During the energy storage process, it mainly includes three main aspects: air compression, heat recovery and storage, and air storage, as follows:

[0056] Air compression: During periods of low grid load, such as at night or during holidays when electricity demand is low, a compressor is used to compress air. The compressor is usually a multi-stage compressor with intermediate cooling devices. The pressure and temperature of the air will rise sharply during the compression process.

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

[0058] Air storage: High-pressure air after compression and cooling is stored in special air storage devices. The air storage devices can be underground caves such as salt caves, abandoned mines, etc., or above-ground pressure vessels. These air storage sites need to meet the geological conditions of high pressure resistance and good sealing performance, or have good pressure resistance and sealing performance, to ensure that high-pressure air can be safely and stably stored.

[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 storage device. The released high-pressure air is first heated in a regenerator or combustor to raise its temperature. Combustor heating typically involves burning a fuel such as natural gas to provide additional heat energy, further raising the air temperature to a level sufficient to effectively drive the turbine.

[0061] Expansion work: Heated, high-pressure, and high-temperature air enters the turbine, where it expands and reduces its pressure. The air's internal energy is converted into kinetic energy, driving the turbine blades. Turbines are typically multi-stage turboexpanders with interstage reheating 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 users to use, thereby realizing the process of converting the stored compressed air energy into electrical energy and releasing it into the power grid.

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

[0064] Calculating the operating efficiency of compressed air energy storage systems is difficult in existing technologies. This is especially difficult because it requires addressing situations where various system components of the compressed air energy storage system deviate from their rated operating conditions. This makes calculations complex and slow.

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

[0066] Based on this, an embodiment of the present application provides a method for calculating the efficiency of a compressed air energy storage system, which 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 working 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 working conditions of the system, thereby reducing the calculation complexity of the energy storage power and energy release power, and improving the calculation speed of determining the energy storage power and energy release power, further realizing the improvement of the calculation speed of the working efficiency of the compressed air energy storage system and reducing the calculation complexity of the working efficiency of the compressed air energy storage system.

[0068] The specific implementation of the method for calculating the efficiency of the compressed air energy storage system in the embodiment of the present application is described in detail below.

[0069] It can be understood that, in the embodiments of the present application, the execution subject can execute part or all of the steps in the embodiments of the present application, and these steps or operations are only examples, and the embodiments of the present application can also execute other operations or various modifications of the operations. In addition, the various steps can be executed in different orders as presented in the embodiments of the present application, and it is possible that not all the operations in the embodiments of the present application are executed.

[0070] It should be noted that the execution subject of the present embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions. The embodiments of the present application and the following embodiments will be described below with the electronic device as an example.

[0071] It should be noted that the message names between the devices in the following embodiments of the present application or the names of the parameters in the messages are only examples, and other names can also be used in specific implementations, and the embodiments of the present application do not make specific limitations.

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

[0073] Exemplary, Figure 2 A flowchart of a compressed air energy storage system efficiency calculation method provided by the embodiments of the present application.

[0074] In some embodiments, referring to Figure 2 The compressed air energy storage system efficiency calculation method can specifically include the following steps:

[0075] S10, determining the energy storage power based on the rated working parameters of the compressed air energy storage system.

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

[0077] In the normal working process of the compressed air energy storage system, the energy storage working process is performed first in the embodiments of the present application. When the energy storage working process is performed, the related parameters of the air in the gas storage chamber are obtained, and then based on the rated working parameters of the compressed air energy storage system, the energy storage power received by the compressed air energy storage system during energy storage is determined.

[0078] The air in the embodiments of the present application refers to the air in the gas storage chamber of the compressed air energy storage system, and it can be understood that the related parameters of the air refer to the related parameters of the air in the gas storage chamber of the compressed air energy storage system. ​

[0079] S20, determine the discharging power based on the rated working parameters of the compressed air energy storage system.

[0080] Determine the discharging power released by the compressed air energy storage system when discharging based on the rated working parameters of the compressed air energy storage system.

[0081] In the normal working process of the compressed air energy storage system, after the energy storage working process is performed, the compressed air energy storage system can perform the discharging working process. When the discharging working process is performed, the related parameters of the air in the gas storage chamber are obtained, and then the discharging power released by the compressed air energy storage system when discharging is determined based on the rated working parameters of the compressed air energy storage system.

[0082] S30, determine the working efficiency of the compressed air energy storage system according to the energy storage power and the discharging power.

[0083] After the energy storage power and the discharging power are determined, the working efficiency of the compressed air energy storage system can be determined according to the energy storage power and the discharging power.

[0084] In the embodiments of the present application, the working efficiency of the compressed air energy storage system can be determined according to the ratio of the discharging power to the energy storage power. For example, the discharging power POW2 is 15.84 MW, and the energy storage power is 26.99 MW, and then the working efficiency η3 of the compressed air energy storage system can be calculated as:

[0085] η3 = POW2 / POW1 = 15.84 MW / 26.99 MW = 0.587.

[0086] In the embodiments of the present application, when calculating the working efficiency of the compressed air energy storage system, the following rated parameters of the compressed air energy storage system can be used for calculation:

[0087] 1. The isentropic efficiency, compression ratio / expansion ratio of each stage of compressor / expander;

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

[0089] 3. Gas storage chamber performance parameters, such as gas storage chamber size, heat loss coefficient, gas storage time. In addition, other parameters can also be included, which are not limited here.

[0090] In the embodiments, the energy storage power and the discharging power can be determined based on the rated working parameters of the compressed air energy storage system, without considering the working condition of the system, thereby reducing the calculation complexity of the energy storage power and the discharging power, improving the calculation speed of the energy storage power and the discharging power, further improving the calculation speed of the working efficiency of the compressed air energy storage system, and reducing the calculation complexity of the working efficiency of the compressed air energy storage system.

[0091] In some embodiments, referring to Figure 3 The step S10 includes steps S101 and S102.

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

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

[0094] In the embodiments of the present application, the air parameters can include air pressure, air temperature and the like. Therefore, the air parameters before energy storage can include air pressure before energy storage and air temperature before energy storage, and the air parameters after energy storage can include air pressure after energy storage and air temperature after energy storage.

[0095] S102, calculating the energy storage power according to 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 in the energy storage working stage is calculated according to the air parameters before and after energy storage based on the rated working parameters of the compressed air energy storage system.

[0097] In the embodiments of the present application, the rated parameters of the compressed air energy storage system can include the isentropic efficiency and compression ratio of each stage of compressor, the isentropic efficiency and compression ratio / expansion ratio of the expander, the water-air flow rate relationship of the heat exchanger, the corresponding relationship between water temperature change and air pressure loss, the size, heat loss coefficient and air storage duration of the air storage chamber. In addition, other parameters can also be included, which are not limited here.

[0098] In the embodiments, a method for calculating the energy storage power is specifically provided, which can first acquire the air parameters before and after energy storage, and then calculate the energy storage power of the compressed air energy storage system in the energy storage working stage based on the rated working parameters of the compressed air energy storage system, thereby reducing the calculation complexity of the energy storage power and improving the calculation speed of the energy storage power. Meanwhile, a method for determining the energy storage power is specifically provided, which improves the realizability of the embodiments of the present application.

[0099] In some embodiments, the air parameters before energy storage can include air pressure before inter-stage cooling and air temperature before inter-stage cooling, and the air parameters after inter-stage cooling can include air pressure after inter-stage cooling and air temperature after inter-stage cooling, as well as air pressure loss value of inter-stage cooling and temperature drop value of inter-stage cooling. The step S101 can specifically include:

[0100] The air pressure after inter-cooling is determined according to the air pressure before inter-cooling, the compression ratio of the compressor and the air pressure loss value of inter-cooling; and the air temperature after inter-cooling is determined according to the air temperature before inter-cooling, the temperature drop value of inter-cooling, the rated isentropic efficiency of the compressor, the adiabatic factor of the air and the compression ratio of the compressor.

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

[0102] In this embodiment, the rated parameters of the compressed air energy storage system can include the isentropic efficiency and the compression ratio of each stage of the compressor, the isentropic efficiency and the compression ratio / expansion ratio of the expander, the water-air flow rate relationship of the heat exchanger, the corresponding relationship between the water temperature change and the air pressure loss, the size, the heat loss coefficient and the air storage duration of the air storage chamber. In addition, other parameters can also be included, which are not limited here.

[0103] In this embodiment, the air parameters of the air in the air storage chamber of the compressed air energy storage system before energy storage and after energy storage can include: the air pressure after inter-cooling is determined according to the air pressure before inter-cooling, the compression ratio of the compressor and the air pressure loss value of inter-cooling; and the air temperature after inter-cooling is determined according to the air temperature before inter-cooling, the temperature drop value of inter-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 air in the air storage chamber of the compressed air energy storage system is inter-cooled, the temperature of the air in the air storage chamber is T1, the pressure is P1, the isentropic efficiency of the compressor of the compressed air energy storage system is η1, and the compression ratio is α. After inter-cooling, the air pressure loss of the air in the air storage chamber is dP, and the air temperature drop is dT, so that:

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

[0106] The air temperature after inter-cooling Wherein K is the adiabatic factor of the air.

[0107] For example, in the 4-stage compression of the compressed air energy storage system, the isentropic efficiency is 84%, the compression ratio is 3, the isentropic efficiency of the 3-stage expansion system is 88%, and the compression ratio is 2.7; the flow rates of water and air are both 25 kg / s in the heat exchange process, the temperature change of water and air is inversely proportional to the heat capacity, the air pressure loss is 0.02 MPa for every 5 K change in water temperature, and the air storage chamber is a sphere with a radius of 10 m, the heat loss coefficient is 34.4 W / (m 2 K). In the compressed air energy storage system, air is compressed by 4-stage intercooling, the temperature of the air in the air storage chamber is 298.15 K and the pressure is 0.10 MPa before the air in the air storage chamber is compressed by intercooling, and the temperature of the air in the air storage chamber is 1121.07 K and the pressure is 7.30 MPa after the air is compressed by intercooling. Table 1 shows the details.

[0108] Temperature (K) Pressure (MPa) Cumulative power (MW) Before compression 298.15 0.10 After 1st interstage cooling 408.03 0.28 3.90 After 2nd interstage cooling 566.14 0.82 9.23 After 3rd interstage cooling 793.67 2.44 16.62 After 4th interstage cooling 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 operating conditions of the system, thereby reducing the calculation complexity of the energy storage power, improving the calculation speed of the energy storage power, and further improving the calculation speed of the operating efficiency of the compressed air energy storage system and reducing the calculation complexity of the operating efficiency of the compressed air energy storage system.

[0111] In some embodiments, the above step S102 can specifically include:

[0112] The energy storage power is determined according to the temperature of the air after intercooling, the pressure of the air after intercooling, the flow rate of the air, the heat capacity of the air, and the isentropic efficiency of the compressor.

[0113] After determining the air parameters before energy storage and the air parameters after energy storage in step S101, the air parameters before energy storage and the air parameters after energy storage include the pressure of the air after intercooling and the temperature of the air after intercooling, and the pressure loss value of the intercooling and the temperature drop value of the intercooling. Then the power consumed by the outside 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 energy storage power is:

[0114] POW1=(T2+dT-T1)*n*C / η1, wherein T2 is the temperature of the air after intercooling, dT is the temperature drop of the air, T1 is the temperature of the air before intercooling, n is the flow rate of the air, C is the heat capacity of the air, and η1 is the isentropic efficiency of the compressor of the compressed air energy storage system.

[0115] For example, in Table 1 above, the temperature of the air in the air reservoir before intercooling during compression is 298.15K, and the pressure is 0.10MPa. After 4 stages of intercooling during compression, the temperature of the air in the air reservoir is 1121.07K, and the pressure is 7.30MPa. Based on this, the energy storage power POW1 can be calculated as 26.99MW.

[0116] In the embodiment, the energy release power can be determined based on the rated working parameters of the compressed air energy storage system, without considering the working condition of the system, thereby reducing the calculation complexity of the energy release power, improving the calculation speed of the energy release power, further improving the calculation speed of the working efficiency of the compressed air energy storage system, and reducing the calculation complexity of the working efficiency of the compressed air energy storage system. Meanwhile, a method for determining the energy storage power is specifically provided, and the realizability of the embodiment is improved.

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

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

[0119] The air in the air reservoir of the compressed air energy storage system is determined, and the air parameters before energy release and the air parameters after energy release are determined.

[0120] In the embodiment, the air parameters can include air pressure, air temperature and the like. Therefore, the air parameters before energy release can include air pressure before energy release and air temperature before energy release, and the air parameters after energy release can include air pressure after energy release and air temperature after energy release.

[0121] S202: calculating the energy release power according to the air parameters before energy release and the air parameters after energy release.

[0122] After the air parameters before energy release and the air parameters after energy release are determined, the energy release power of the compressed air energy storage system in the energy release working stage is calculated based on the rated working parameters of the compressed air energy storage system according to the air parameters before energy release and the air parameters after energy release.

[0123] In the embodiment, the rated parameters of the compressed air energy storage system can include the isentropic efficiency and compression ratio of each stage of compressor, the isentropic efficiency and compression ratio / expansion ratio of the expander, the water-air flow rate relationship of the heat exchanger, the corresponding relationship between water temperature change and air pressure loss, the size of the air reservoir, the heat loss coefficient, and the air storage time. In addition, other parameters can also be included, which are not limited here.

[0124] In the embodiment, a method for calculating the energy release power is specifically provided, the air parameters before energy release and the air parameters after energy release can be acquired, and then the energy release power of the compressed air energy storage system in the energy release working stage is calculated based on the rated working parameters of the compressed air energy storage system, so that the calculation complexity of the energy release power is reduced, and the calculation speed of the energy release power is improved. Meanwhile, a method for determining the energy release power is specifically provided, and the realizability of the embodiment is improved.

[0125] In some embodiments, with reference to Figure 4 The air parameters before energy release can include the air pressure before regenerative expansion and the air temperature before regenerative expansion, the air parameters after regenerative expansion can include the air pressure after regenerative expansion and the air temperature after regenerative expansion, and the air pressure loss value of regenerative expansion and the temperature drop value of regenerative expansion. The step S201 can specifically include:

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

[0127] In the embodiment, based on the rated working parameters of the compressed air energy storage system, the air pressure after regenerative expansion and the air temperature after regenerative expansion can be calculated according to the air pressure before regenerative expansion, the air temperature before regenerative expansion, the air pressure increase value of regenerative expansion and the temperature rise value of regenerative expansion.

[0128] In the embodiment, the rated parameters of the compressed air energy storage system can include the isentropic efficiency and the compression ratio of each stage of the compressor, the isentropic efficiency and the compression ratio / expansion ratio of the expander, the water-air flow rate relationship of the heat exchanger, the corresponding relationship between the water temperature change and the air pressure loss, the size, the heat loss coefficient and the air storage duration of the air storage chamber. In addition, other parameters can also be included, which are not limited here.

[0129] In the embodiment, the air parameters before energy release and the air parameters after energy release of the air in the air storage chamber of the compressed air energy storage system can be determined as follows: the air pressure after regenerative expansion is determined according to the air pressure before regenerative expansion, the compression ratio of the expander and the air pressure loss value of regenerative expansion, and the air temperature after regenerative expansion is determined according to the air temperature before regenerative expansion, the temperature drop value of regenerative expansion, the rated isentropic efficiency of the expander, the adiabatic factor of air and the compression ratio of the expander.

[0130] Specifically, the temperature of the air before the regenerative expansion is T3, the pressure is P3, the air pressure increase value after the regeneration is dP, the air temperature increase value is dT, the isentropic efficiency of the expander is η2, and the expansion ratio is β, so that the following can be calculated:

[0131] The pressure P4 of the air after the regenerative expansion is P4=(P3+dP)*β.

[0132] The temperature T4 of the air after the regenerative expansion is T4=T3+dT.

[0133] For example, as shown in Table 2, the isentropic efficiency of the 4-stage compression of the compressed air energy storage system is 84%, and the compression ratio is 3. The isentropic efficiency of the 3-stage expansion system is 88%, and the compression ratio is 2.7. The flow rates of water and air during the heat exchange process are both 25 kg / s. The water temperature change is inversely proportional to the heat capacity, and the air pressure loss is 0.02 MPa per 5 K change in water temperature. The gas storage chamber is a sphere with a radius of 10 m, and the isothermal heat release has a heat loss coefficient of 34.4 W / (m 2 K). The compressed air energy storage system performs 3-stage regenerative expansion on the air. Before the regenerative expansion, the temperature of the air in the gas storage chamber is 1100.07 K, and the pressure is 2.07 MPa. After the 3-stage regenerative expansion, the temperature of the air in the gas storage chamber is 443.07 K, and the pressure is 0.09 MPa.

[0134] Temperature (K) Pressure (MPa) Cumulative power (MW) Before expansion 1100.07 2.07 After 1st regenerative expansion 806.31 0.78 6.92 After 2nd regenerative expansion 595.03 0.28 12.03 After 3rd regenerative expansion 443.07 0.09 15.84

[0135] Table 3

[0136] In some embodiments, step S202 can specifically include the following steps corresponding to step S201:

[0137] The energy storage power is determined according to the air temperature after the regenerative expansion, the air pressure after the regenerative expansion, the flow rate of the air, the heat capacity of the air, and the isentropic efficiency of the compressor.

[0138] After determining the air parameters before energy release and the air parameters after energy release in step S101, the air parameters before energy release and the air parameters after energy release include the air pressure after inter-stage cooling and the air temperature after inter-stage cooling, and the air pressure loss value after inter-stage cooling and the temperature drop value after inter-stage cooling.

[0139] Then the power consumed by the outside 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 energy release power, is:

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

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

[0142] In this embodiment, a method for calculating the energy release power is specifically provided, which can first acquire the air parameters before energy release and the air parameters after energy release, and then calculate the energy release power of the compressed air energy storage system in the energy release working stage based on the rated working parameters of the compressed air energy storage system, so as to reduce the calculation complexity of the energy release power and improve the calculation speed of the energy release power. Meanwhile, a method for determining the energy release power is specifically provided, which improves the realizability of the embodiments of the present application.

[0143] In the embodiments of the present application, the energy storage power and the energy release power can be 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 working efficiency of the compressed air energy storage system can be quickly and simply determined. It can be understood that other parameter information of the compressed air energy storage system can also be quickly and simply determined based on the rated working parameters of the compressed air energy storage system, for example, the air pressure after heat recovery can also be calculated based on the rated working parameters of the compressed air energy storage system in the working process of the compressed air energy storage system.

[0144] In some embodiments, with reference to Figure 5 The above method can further include the step S40:

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

[0146] The air pressure after heat recovery is calculated based on the air parameters before heat recovery and the rated working parameters of the compressed air energy storage system.

[0147] In the embodiments of the present application, the rated parameters of the compressed air energy storage system can include the isentropic efficiency and compression ratio of each stage of compressor, the isentropic efficiency and compression ratio / expansion ratio of the expander, the water-air flow rate relationship of the heat exchanger, the corresponding relationship between water temperature change and air pressure loss, and the size, heat loss coefficient and air storage duration of the air storage chamber. In addition, other parameters can also be included, which are not limited here.

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

[0149] In some embodiments, the step S40 specifically comprises:

[0150] The air pressure after heat recovery is determined according to the air pressure before heat recovery, the air temperature before heat recovery, the storage duration, 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 the stored air is compressed, a heat recovery operation of cooling and decompressing is required, and the air is isothermally exothermed during storage. The air pressure P6 after storage can be calculated according to the air temperature T5 before heat recovery, the air pressure P5 before heat recovery, the storage duration t, the surface area S of the air storage chamber, the volume V of the air storage chamber, the room temperature Troom, and the rated heat loss coefficient w of the air 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 of 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. The flow rates of water and air during heat exchange are both 25 kg / s. The water temperature change 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 the isothermal exotherm is 34.4 W / (m 2 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] It can be understood that after the air pressure after storage is calculated, it can be determined whether the air pressure after storage meets the preset condition, so as to adjust the operating parameters of the compressed air energy storage system.

[0155] Temperature (K) Pressure (MPa) Cumulative power (MW) Before storage 323.07 6.54 After 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 working parameters of the compressed air energy storage system, so as to reduce the calculation complexity and improve the calculation speed. Meanwhile, a method for calculating the air pressure of the compressed air energy storage system after heat recovery is specifically provided, and the realizability of the embodiments of the present application is improved.

[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 A structural schematic diagram of an electronic device is provided for the embodiments of the present application. As shown in Figure 6 The electronic device 600 includes:

[0160] The first determination module 601 is configured to determine 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.

[0161] The second determination module 602 is configured to determine 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.

[0162] The third determination module 603 is configured to determine the working efficiency of the compressed air energy storage system according to the energy storage power and the energy release power.

[0163] In a possible implementation manner, the first determination module 601 is specifically configured to: determine the air parameters before energy storage and the air parameters after energy storage of the compressed air energy storage system; and calculate the energy storage power according to the air parameters before energy storage and the air parameters after energy storage based on the rated working parameters of the compressed air energy storage system.

[0164] In a possible implementation manner, the air parameters include the air temperature before inter-stage cooling, the air pressure before inter-stage cooling, the air pressure loss value of inter-stage cooling, and the temperature drop value of inter-stage cooling, and the compressed air energy storage system includes a compressor; and the first determination module 601 is specifically configured to: determine the air pressure after inter-stage cooling according to the air pressure before inter-stage cooling, the compression ratio of the compressor, and the air pressure loss value of inter-stage cooling; determine the air temperature after inter-stage cooling according to the air temperature before inter-stage cooling, the temperature drop value of inter-stage cooling, the rated isentropic efficiency of the compressor, the adiabatic factor of air, and the compression ratio of the compressor; and determine the energy storage power according to the air temperature after inter-stage cooling, the air pressure after inter-stage cooling, the flow rate of air, the heat capacity of air, and the isentropic efficiency of the compressor.

[0165] In a possible implementation, the second determining module 602 is specifically configured to: determine an air parameter before energy release and an air parameter after energy release of the compressed air energy storage system; and calculate the energy release power according to the air parameter before energy release and the air parameter after energy release based on the rated working parameter of the compressed air energy storage system.

[0166] In a possible implementation, the air parameter includes an air temperature before regenerative expansion, an air pressure before regenerative expansion, an air pressure increase value of regenerative expansion, and a temperature rise value of regenerative expansion, and the compressed air energy storage system includes an expander; the second determining module 602 is specifically configured to: determine the air pressure after regenerative expansion according to the air pressure before regenerative expansion, a rated expansion ratio of the expander, and an air pressure loss value of regenerative expansion; determine the air temperature after regenerative expansion according to the air temperature before regenerative expansion, a temperature drop value of regenerative expansion, a rated isentropic efficiency of the compressor, an adiabatic factor of the air, and a compression ratio of the compressor; and determine the energy storage power according to the air temperature after regenerative expansion, the air pressure after regenerative expansion, a flow rate of the air, a heat capacity of the air, and the isentropic efficiency of the compressor.

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

[0168] The fourth determining module 604 is configured to calculate an air pressure after heat recovery according to an air parameter before heat recovery based on the rated working parameter of the compressed air energy storage system.

[0169] In a possible implementation, the fourth determining module 604 is specifically configured to determine the air pressure after heat recovery according to the air pressure before heat recovery, the air temperature before heat recovery, a storage duration, a surface area of the gas storage chamber, a volume of the gas storage chamber, and a rated heat loss coefficient of the gas storage chamber.

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

[0171] Figure 7 A structural schematic diagram of an electronic device provided by an embodiment of the present application is shown in FIG. 7. As shown in FIG. 7, the electronic device 700 includes one or more (including two) processors 701, a communication line 702, and a communication interface 703. Optionally, the electronic device 700 further includes a memory 704. Figure 7

[0172] In some embodiments, the memory 704 stores the following elements: executable modules or data structures, or a subset of them, or an extended set of them.

[0173] ​The method described in the embodiments of the present application can be applied to the processor 701 or implemented by the processor 701. The processor 701 can be an integrated circuit chip having a signal processing capability. In the implementation process, each step of the above method can be completed by the integrated logic circuit or the instruction in the software form of the hardware in the processor 701. The processor 701 described above can be a general processor (for example, a microprocessor or a conventional processor), a digital signal processor, an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, a discrete gate or transistor logic device, or a discrete hardware component. The processor 701 can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application.

[0174] The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. Among them, the software module can be located in a mature storage medium in the field, such as a random access memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable read-only memory (EEPROM). The storage medium is located in the memory 704, and the processor 701 reads the information in the memory 704 and combines the hardware to complete the steps of the above method.

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

[0176] In the above embodiments, the instructions stored in the memory for the processor to execute can be implemented in the form of a computer program product. Among them, the computer program product can be written in the memory in advance, or downloaded and installed in the memory in the form of software.

[0177] The embodiments of the present application further provide a computer program product including one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions performed by the electronic device or the electronic device according to the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from one website satellite constellation, computer, server or data center to another website satellite constellation, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that can be stored by the computer or a data storage device such as a server, data center, etc. integrated with one or more available media sets. For example, the available media can include magnetic media (such as floppy disk, hard disk or magnetic tape), optical media (such as digital versatile disc (DVD)), or semiconductor media (such as solid state disk (SSD)) and the like.

[0178] The embodiments of the present application provide an electronic device, which includes a processor and a memory. The memory is configured to store a computer program, and the processor is configured to execute the computer program to perform the compressed air energy storage system efficiency calculation method described above.

[0179] The embodiments of the present application further provide a computer-readable storage medium. The computer-readable storage medium stores computer programs or instructions. The computer programs or instructions are executed by the processor to implement the method performed by the base station or the electronic device described above. The method described in the above embodiments can be implemented by software, hardware, firmware or any combination thereof, in whole or in part. If implemented in software, the functions can be stored as one or more instructions or codes on a computer-readable medium or transmitted on a computer-readable medium. The computer-readable medium can include computer storage medium and communication medium, and can also include any medium that can transfer computer programs from one place to another. The storage medium can be any target medium accessible by a computer.

[0180] As a 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 magnetic disk storage or other magnetic disk storage devices. Moreover, any connecting line may also be appropriately referred to as a computer-readable medium. For example, if the software is transmitted from a website, server or other remote source using a coaxial cable, fiber optic cable, twisted pair, DSL or wireless technologies such as infrared, radio and microwave, the coaxial cable, fiber optic cable, twisted pair, DSL or wireless technologies such as infrared, radio and microwave are included in the definition of medium. Disks and optical discs as used herein include compact discs (CDs), laser discs, optical discs, DVDs, floppy disks and Blu-ray discs, where disks generally reproduce data magnetically, while optical discs reproduce data optically using lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0181] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processing unit of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processing unit of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0182] The above specific implementation methods further illustrate the purpose, technical solutions and beneficial effects of this application in detail. It should be understood that the above are only specific implementation methods of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of this application should be included in 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 comprises: determining, based on rated operating parameters of the compressed air energy storage system, a stored energy power received by the compressed air energy storage system during energy storage; determining, based on rated operating parameters of the compressed air energy storage system, the energy release power of the compressed air energy storage system during energy release; The working efficiency of the compressed air energy storage system is determined according to the energy storage power and the energy release power.

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

3. The method according to claim 2, characterized in that The air parameters include the air temperature before compression intercooling, the air pressure before compression intercooling, the air pressure loss value of compression intercooling, and the temperature drop value of compression intercooling. The compressed air energy storage system includes a compressor; The calculating the energy storage power according to the air parameters before and after energy storage includes: Determining the air pressure after compression intercooling according to the air pressure before compression intercooling, the compression ratio of the compressor, and the air pressure loss value of the compression intercooling; determining the air temperature after inter-compression cooling according to the air temperature before inter-compression cooling, the temperature drop value of inter-compression cooling, the rated isentropic efficiency of the compressor, the adiabatic factor of the air, and the compression ratio of the compressor; The energy storage power is determined according to the air temperature after compression intercooling, the air pressure after compression intercooling, the air flow rate, the heat capacity of the air and the isentropic efficiency of the compressor.

4. The method according to claim 3, characterized in that Determining the energy release power of the compressed air energy storage system during energy release includes: Determining 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 and the air parameters before and after the energy release.

5. The method according to claim 4, characterized in that The air parameters include the air temperature before regenerative expansion, the air pressure before regenerative expansion, the pressure increase value of regenerative expansion, and the temperature rise value of regenerative expansion. The compressed air energy storage system includes an expander. The calculating the energy release power based on the rated operating parameters of the compressed air energy storage system and the air parameters before and after the energy release includes: determining the air pressure after the regenerative expansion according to the air pressure before the regenerative expansion, the rated expansion ratio of the expander, and the pressure loss value of the regenerative expansion; determining the air temperature after the regenerative expansion according to the air temperature before the regenerative expansion, the temperature drop value of the regenerative expansion, the rated isentropic efficiency of the compressor, the adiabatic factor of the air, and the compression ratio of the compressor; The energy storage power is determined according to the air temperature after the heat regeneration expansion, the air pressure after the heat regeneration expansion, the air flow rate, the heat capacity of the air and the isentropic efficiency of the compressor.

6. The method according to claim 5, characterized in that The method further comprises: Based on the rated operating parameters of the compressed air energy storage system and the air parameters before heat recovery, the air pressure after heat recovery is calculated.

7. The method according to claim 6, characterized in that The calculating, based on the rated operating parameters of the compressed air energy storage system, the air temperature after heat recovery includes: 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.

8. An electronic device, characterized in that: The electronic device comprises: A first determining module is configured 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; A second determining module is configured to determine the energy release power of the compressed air energy storage system when releasing energy based on the rated operating parameters of the compressed air energy storage system; A third determination module is used to determine the working efficiency of the compressed air energy storage system according to the energy storage power and the energy release power.

9. An electronic device, characterized in that: It comprises a memory and a processor, the memory is used to store a computer program, and the processor is used to call the computer program to execute the compressed air energy storage system efficiency calculation method according to any one of claims 1 to 7.

10. 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, the compressed air energy storage system efficiency calculation method according to any one of claims 1 to 7 is implemented.

11. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the method for calculating the efficiency of a compressed air energy storage system according to any one of claims 1 to 7 is implemented.

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