Compressed air energy storage power generation system

Abstract

The present application relates to a compressed air energy storage and power generation system, comprising: an air compressor, a first cooler and a storage structure, the first cooler being used to cool compressed air, and the storage structure being used to store compressed air; a first heater and an air turbine generator, the first heater being used to heat compressed air, and the air turbine generator being able to consume the internal energy of compressed air to generate electricity; a thermocline storage tank having an upper portion and a lower portion connected to each other, the upper portion being used to store first hot water having a first temperature, and the lower portion being used to store second hot water having a second temperature, the first temperature being greater than the second temperature; a cooling pipeline connecting the upper portion, the first cooler and the lower portion, the second hot water being able to flow through the cooling pipeline to the first cooler to cool the compressed air, and then flow through the cooling pipeline to the upper portion; a heating pipeline connecting the upper portion, the first heater and the lower portion, the first hot water being able to flow through the heating pipeline to the first heater to heat the compressed air, and then flow through the heating pipeline to the lower portion.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a compressed air energy storage power generation system. Background Art

[0002] The compressed air energy storage power generation system uses excess electricity when the power system is under low load to compress air and store it in underground salt caverns or underground artificial chambers. It then releases the air when needed and generates electricity through an air turbine generator set after heating to meet peak load needs.

[0003] Currently, common compressed air energy storage and power generation systems include molten salt + hot water heat storage, thermal oil + hot water heat storage, and medium and high temperature water heat storage (high-pressure hot water + normal-pressure hot water). As for molten salt + hot water heat storage and thermal oil + hot water heat storage, as well as normal-pressure hot water storage tanks in medium and high temperature water heat storage, two hot water storage tanks are often required according to the application of the engineering design, respectively used to store hot water at different temperatures (for example, in a certain engineering design, the temperature range for storing hot water is 60°C-90°C, and two hot water storage tanks are required for hot water at 60°C and hot water at 90°C). This makes the structure of the entire compressed air energy storage and power generation system complex and increases the investment cost. At the same time, the use of two hot water storage tanks results in a larger heat dissipation area, resulting in large heat dissipation losses. Summary of the Invention

[0004] Based on this, it is necessary to provide a compressed air energy storage power generation system that can reduce costs and reduce heat dissipation losses to address the problems of high costs and large heat dissipation losses of traditional air energy storage power generation systems.

[0005] A compressed air energy storage power generation system, comprising:

[0006] An air compressor, a first cooler, and a storage structure, wherein the air compressor is used to compress external air into compressed air, the first cooler is used to cool the compressed air compressed by the air compressor, and the storage structure is used to store the compressed air cooled by the first cooler;

[0007] a first heater and an air turbine generator, wherein the first heater is used to heat the compressed air flowing out of the storage structure, and the air turbine generator is capable of consuming the internal energy of the compressed air heated by the first heater to generate electricity;

[0008] a thermocline tank having an upper portion and a lower portion connected to each other, the upper portion being used to store first hot water having a first temperature, and the lower portion being used to store second hot water having a second temperature, the first temperature being greater than the second temperature;

[0009] a cooling pipeline connecting the upper portion, the first cooler, and the lower portion, wherein the second hot water can flow through the cooling pipeline to the first cooler to cool the compressed air, and then flow through the cooling pipeline to the upper portion;

[0010] A heating pipeline connects the upper part, the first heater and the lower part. The first hot water can flow to the first heater through the heating pipeline to heat the compressed air and then flow to the lower part through the heating pipeline.

[0011] In this compressed air energy storage and power generation system, both the first hot water at the first temperature and the second hot water at the second temperature are stored in a thermocline tank. This simplifies the structure of the entire compressed air energy storage and power generation system, reducing investment costs, compared to the prior art method of storing hot water at the two temperatures in separate tanks. Furthermore, using the same tank for both temperatures reduces the heat dissipation area, compared to using two tanks, resulting in minimal heat loss and greater energy efficiency.

[0012] In one embodiment, the cooling circuit and the heating circuit have a common circuit.

[0013] In one embodiment, the compressed air energy storage power generation system further includes a water pump, which is provided on the common pipeline;

[0014] When the compressed air energy storage power generation system stores heat, the water pump can provide flow force for the second hot water to flow from the lower part to the upper part; when the compressed air energy storage power generation system generates electricity, the water pump can provide flow force for the first hot water to flow from the upper part to the lower part.

[0015] In one embodiment, the cooling pipeline and the heating pipeline have a first common pipeline, a second common pipeline, and a third common pipeline, the cooling pipeline further includes a first connecting pipeline, a second connecting pipeline, and a third connecting pipeline, and the heating pipeline further includes a fourth connecting pipeline, a fifth connecting pipeline, and a sixth connecting pipeline;

[0016] The first common pipeline is connected to the upper portion, and the second common pipeline is connected to the lower portion; the first communicating pipeline is connected to the second common pipeline and the third common pipeline, the second communicating pipeline is connected to the third common pipeline and one end of the first cooler, and the third communicating pipeline is connected to the other end of the first cooler and the first common pipeline;

[0017] The fourth communicating pipe connects the first common pipe and the third common pipe, the fifth communicating pipe connects the third common pipe and one end of the first heater, and the sixth communicating pipe connects the other end of the first heater and the second common pipe.

[0018] In one embodiment, a first valve is installed on the cooling pipeline, and the first valve is used to control the on-off of the cooling pipeline.

[0019] In one embodiment, a second valve is installed on the heating pipeline, and the second valve is used to control the on-off of the heating pipeline.

[0020] In one embodiment, a second cooler is further included. The second cooler is arranged between the air compressor and the first cooler. The compressed air compressed by the air compressor is cooled by the second cooler and then enters the first cooler for cooling.

[0021] In one embodiment, a third cooler is further included. The third cooler is arranged between the first cooler and the storage structure. The compressed air cooled by the first cooler is cooled by the third cooler and then flows to the storage structure.

[0022] In one embodiment, a second heater is further included. The second heater is arranged between the first heater and the air turbine generator, and the second heater is used to heat the compressed air after passing through the first heater.

[0023] In one embodiment, the first temperature is 90°C and the second temperature is 60°C. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a compressed air energy storage power generation system provided in one embodiment of the present application;

[0025] Figure 2 for Figure 1 The schematic diagram of the compressed air energy storage power generation system shown in FIG.

[0026] Figure 3 for Figure 1 The schematic diagram of the compressed air energy storage power generation system in power generation is shown in FIG.

[0027] Description of reference numerals:

[0028] 100. Compressed air energy storage and power generation system; 10. Air compressor; 20. First cooler; 30. Storage structure; 40. First heater; 50. Air turbine generator; 60. Thermostatic layer storage tank; 61. Upper part; 62. Lower part; 70. Cooling pipeline; 80. Heating pipeline; 90. Second cooler; 110. Third cooler; 120. Second heater; 130. First conducting pipeline; 140. Second conducting pipeline; 150. Third valve; 160. Fourth valve; 170. Water pump; 180. First valve; 190. Second valve. DETAILED DESCRIPTION

[0029] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0032] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0033] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0035] Before introducing the present application in detail, some components used in the present application are introduced.

[0036] An air compressor is a device used to compress gas. Its structure is similar to that of a water pump. According to the principles of physics, when air is compressed, it releases a large amount of heat. Specifically, an air compressor has a low-pressure chamber, an intermediate-pressure chamber, and a high-pressure chamber. When compressing external air, it can select one or more of these chambers for compression.

[0037] A generator is a machine that converts the energy contained in a fluid medium into mechanical work. This type of generator is typically an air turbine generator, also known as a turbine. This generator utilizes the adiabatic expansion of pressurized gas within the generator, consuming the gas's internal energy and thus intensely cooling the gas to generate electricity. This expansion process lowers the gas's temperature, creating a cooling effect.

[0038] Thermostatic layer storage tanks use thermostatic layer heat storage technology to store the medium with higher temperature in the upper part of the tank and the medium with lower temperature in the lower part of the tank. A temperature gradient layer (thermostatic layer) is formed between the medium with higher temperature and the medium with lower temperature. The thermostatic layer can prevent the hot and cold media from directly contacting each other, thereby enabling one container to hold both high and low temperature media at the same time.

[0039] See Figure 1The present application provides a compressed air energy storage power generation system 100, comprising an air compressor 10, a first cooler 20, and a storage structure 30. The air compressor 10 is used to compress outside air to form compressed air, the first cooler 20 is used to cool the compressed air compressed by the air compressor 10, and the storage structure 30 is used to store the compressed air cooled by the first cooler 20 to store energy. When the power system is under low capacity load, outside air enters the air compressor 10 and is compressed to form compressed air. The compressed air is then cooled by the first cooler 20 and then stored in the storage structure 30.

[0040] It should be noted that the storage structure 30 can be a storage cave, a salt cave, an artificial chamber or a high-pressure pipeline, etc., which is not limited here.

[0041] The compressed air energy storage and power generation system 100 also includes a first heater 40 and an air turbine generator 50. The first heater 40 is used to heat the compressed air flowing out of the storage structure 30. The air turbine generator 50 consumes the internal energy of the compressed air heated by the first heater 40 to generate electricity. During peak power demand, the compressed air stored in the storage structure 30 flows out and is heated by the first heater 40. The heated compressed air then enters the air turbine generator 50, which consumes the internal energy of the heated compressed air to generate electricity.

[0042] The compressed air energy storage and power generation system 100 also includes a thermocline tank 60, a cooling pipeline 70, and a heating pipeline 80. The thermocline tank 60 has an upper portion 61 and a lower portion 62 that are connected to each other. The upper portion 61 is used to store first hot water at a first temperature, and the lower portion 62 is used to store second hot water at a second temperature, where the first temperature is greater than the second temperature. The cooling pipeline 70 connects the upper portion 61, the first cooler 20, and the lower portion 62. The second hot water can flow from the cooling pipeline 70 to the first cooler 20 to cool the compressed air, and then flow to the upper portion 61 through the cooling pipeline 70. The heating pipeline 80 connects the upper portion 61, the first heater 40, and the lower portion 62. The first hot water can flow from the heating pipeline 80 to the first heater 40 to heat the compressed air, and then flow to the lower portion 62 through the heating pipeline 80.

[0043] In one embodiment, the first temperature is 90° C. and the second temperature is 60° C. Of course, in other embodiments, there is no limitation on the specific values of the first temperature and the second temperature.

[0044] During periods of low power system load, the lower-temperature second hot water flows from the lower portion 62 of the thermocline tank 60 through the cooling pipe 70 to the first cooler 20. The second hot water entering the first cooler 20 can exchange heat with the incoming compressed air, lowering the compressed air's temperature. During peak power demand, the higher-temperature first hot water flows from the upper portion 61 of the thermocline tank 60 through the heating pipe 80 to the first heater 40. The first hot water entering the first heater 40 can exchange heat with the incoming compressed air, raising the compressed air's temperature.

[0045] In the compressed air energy storage and power generation system 100 provided herein, both the first hot water at the first temperature and the second hot water at the second temperature are stored in a thermocline tank 60. Compared to the prior art method of storing hot water at the two temperatures in separate storage tanks, this simplifies the structure of the entire compressed air energy storage and power generation system 100 and reduces investment costs. Furthermore, the use of a single storage tank for hot water at both temperatures reduces the heat dissipation area compared to using two storage tanks, minimizing heat dissipation losses and achieving greater energy efficiency.

[0046] In one embodiment, continue to refer to Figure 1 The compressed air energy storage power generation system 100 also includes a second cooler 90, which is arranged between the air compressor 10 and the first cooler 20. The compressed air compressed by the air compressor 10 is cooled by the second cooler 90 and then enters the first cooler 20 for cooling.

[0047] Furthermore, the compressed air energy storage power generation system 100 also includes a third cooler 110, which is arranged between the first cooler 20 and the storage structure 30. The compressed air cooled by the first cooler 20 is cooled by the third cooler 110 and then flows to the storage structure 30.

[0048] In this way, the compressed air generated by the air compressor 10 is cooled step by step by the second cooler 90 , the first cooler 20 and the third cooler 110 , so that the compressed air can be cooled to a lower temperature for preservation, thereby storing more energy.

[0049] The compressed air energy storage and power generation system 100 also includes a second heater 120, which is disposed between the first heater 40 and the air turbine generator 50. The second heater 120 is used to heat the compressed air heated by the first heater 40. Thus, the compressed air flowing out of the storage structure 30 is heated by both the first heater 40 and the second heater 120 before entering the air turbine generator 50 to generate electricity.

[0050] In one embodiment, the compressed air energy storage power generation system 100 uses a molten salt + hot water heat storage method. The compressed air energy storage power generation system 100 also includes a first molten salt tank and a second molten salt tank. The molten salt stored in the first molten salt tank and the second molten salt tank have different temperatures, and the temperature of the molten salt in the first molten salt tank is higher than the temperature of the molten salt in the second molten salt tank. The molten salt in the second molten salt tank can enter the second cooler 90 for heat exchange with the compressed air, and then enter the first molten salt tank for storage. The molten salt in the first molten salt tank can enter the second heater 120 for heat exchange with the compressed air, and then enter the second molten salt tank for storage.

[0051] In another specific embodiment, the compressed air energy storage power generation system 100 utilizes thermal oil and hot water for heat storage. The compressed air energy storage power generation system 100 also includes a first thermal oil tank and a second thermal oil tank. The thermal oil stored in the first and second thermal oil tanks has different temperatures, with the temperature of the thermal oil in the first tank being higher than that in the second tank. The thermal oil in the second tank can enter the second cooler 90 for heat exchange with the compressed air, and then enter the first tank. The thermal oil in the first tank can enter the second heater 120 for heat exchange with the compressed air, and then enter the second tank for storage.

[0052] It should be noted that the air compressor 10, the second cooler 90, the first cooler 20, the third cooler 110, and the storage structure 30 are all connected via a first conducting pipe 130, and the storage structure 30, the first heater 40, the second heater 120, and the air turbine generator 50 are all connected via a second conducting pipe 140. In order to control whether the compressed air is compressed into the storage structure 30 or whether it flows out of the storage structure 30, the compressed air energy storage power generation system 100 also includes a third valve 150 and a fourth valve 160. The third valve 150 is provided on the first conducting pipe 130 between the third cooler 110 and the storage structure 30, and the fourth valve 160 is provided on the second conducting pipe 140 between the storage structure 30 and the first heater 40.

[0053] In one embodiment, the cooling pipeline 70 and the heating pipeline 80 share a common pipeline, which can reduce the length of the pipeline and thus reduce the floor space.

[0054] Continue reading Figure 1The compressed air energy storage power generation system 100 also includes a water pump 170, which is installed on the shared pipeline. When the compressed air energy storage power generation system 100 is storing energy, the water pump 170 can provide the flow force for the second hot water to flow through the lower portion 62 to the upper portion 61. When the compressed air energy storage power generation system 100 is generating electricity, the water pump 170 can provide the flow force for the first hot water to flow through the upper portion 61 to the lower portion 62. This arrangement allows a single water pump 170 to achieve the flow of the second hot water from the lower portion 62 to the upper portion 61 of the thermocline tank 60 and the flow of the first hot water from the upper portion 61 to the lower portion 62 of the thermocline tank 60, further reducing the floor space.

[0055] Furthermore, the cooling line 70 and the heating line 80 have a first common line, a second common line, and a third common line. The cooling line 70 also includes a first connecting line, a second connecting line, and a third connecting line, while the heating line 80 also includes a fourth connecting line, a fifth connecting line, and a sixth connecting line. The first common line is connected to the upper portion 61, and the second common line is connected to the lower portion 62.

[0056] The first connecting pipe connects the second common pipe and the third common pipe, the second connecting pipe connects the third common pipe and one end of the first cooler 20 , and the third connecting pipe connects the other end of the first cooler 20 and the first common pipe.

[0057] The fourth communication line connects the first common line and the third common line, the fifth communication line connects the third common line and one end of the first heater 40 , and the sixth communication line connects the other end of the first heater 40 and the second common line.

[0058] The compressed air energy storage power generation system 100 also includes a first valve 180 and a second valve 190. The first valve 180 is used to control the on / off of the cooling pipeline 70, and the second valve 190 is used to control the on / off of the heating pipeline 80. Specifically, the compressed air energy storage power generation system 100 includes five first valves 180 and five second valves 190. A first valve 180 is provided on each of the second common pipeline, the first connecting pipeline, the second connecting pipeline, the third connecting pipeline, and the second common pipeline. A second valve 190 is provided on each of the first common pipeline, the fourth connecting pipeline, the fifth connecting pipeline, the sixth connecting pipeline, and the second common pipeline. Specifically, the first valve 180 and the second valve 190 provided on the first common pipeline are the same valve, and the first valve 180 and the second valve 190 provided on the second common pipeline are also the same valve. The above-mentioned water pump 170 is provided on the third common pipeline.

[0059] Of course, in other embodiments, the cooling pipeline 70 and the heating pipeline 80 may be provided separately, and a water pump 170 may be installed on each of the cooling pipeline 70 and the heating pipeline 80 , which is not limited here.

[0060] The working principle of the compressed air energy storage power generation system 100 provided in this application is as follows:

[0061] See Figure 2 During the process of storing compressed air, or heat accumulation, in the air compressor 10, the first valve 180 and the third valve 150 are open, while the second valve 190 and the fourth valve 160 are closed. It should be noted that to maintain conductivity in the cooling line 70, the valves located on the first and second common lines are open. The lower-temperature second hot water in the thermocline tank 60 is drawn from the lower portion 62 and delivered to the first cooler 20 via the water pump 170 for heat exchange with the compressed air generated by the air compressor 10. The resulting higher-temperature hot water flows back to the upper portion 61 of the thermocline tank 60.

[0062] During the compressed air storage stage, the thermocline tank 60 is in a heat preservation operation mode, the water pump 170 is stopped, and the air compressor 10 and the air turbine generator 50 are stopped.

[0063] See Figure 3 During the power generation phase of the air turbine generator 50, the first valve 180 and the third valve 150 are closed, while the second valve 190 and the fourth valve 160 are open. It should be noted that to maintain electrical continuity in the heating pipeline 80, the valves on the first and second common pipelines are opened. The higher-temperature first hot water in the thermocline tank 60 is drawn from the upper portion 61 and pumped by the water pump 170 to the first heater 40 for heat exchange with the compressed air flowing out of the storage structure 30. The resulting lower-temperature hot water flows back to the lower portion 62 of the thermocline tank 60.

[0064] The compressed air energy storage power generation system 100 provided in this application has the following beneficial effects:

[0065] 1. Both the first hot water at the first temperature and the second hot water at the second temperature are stored in the thermocline tank 60, simplifying the structure of the entire compressed air energy storage and power generation system 100 and reducing investment costs. Furthermore, using the same tank for both hot water temperatures reduces the heat dissipation area compared to using two tanks, minimizing heat loss and achieving greater energy efficiency.

[0066] 2. A single water pump 170 can not only provide flow force when the compressed air energy storage power generation system 100 stores heat, but also provide flow force when it generates electricity. Compared with the case of using two water pumps 170, the occupied area is reduced.

[0067] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A compressed air energy storage power generation system, characterized in that: include: An air compressor (10), a first cooler (20) and a storage structure (30), wherein the air compressor (10) is used to compress external air to form compressed air, the first cooler (20) is used to cool the compressed air compressed by the air compressor (10), and the storage structure (30) is used to store the compressed air cooled by the first cooler (20); a first heater (40) and an air turbine generator (50), wherein the first heater (40) is used to heat the compressed air flowing out of the storage structure (30), and the air turbine generator (50) is capable of consuming the internal energy of the compressed air heated by the first heater (40) to generate electricity; A thermocline storage tank (60) having an upper portion (61) and a lower portion (62) connected to each other, wherein the upper portion (61) is used to store first hot water having a first temperature, and the lower portion (62) is used to store second hot water having a second temperature, wherein the first temperature is greater than the second temperature; A cooling pipeline (70) connects the upper part (61), the first cooler (20) and the lower part (62), and the second hot water can flow to the first cooler (20) through the cooling pipeline (70) to cool the compressed air, and then flow to the upper part (61) through the cooling pipeline (70); a heating pipeline (80) connects the upper part (61), the first heater (40) and the lower part (62), and the first hot water can flow to the first heater (40) through the heating pipeline (80) to heat the compressed air, and then flow to the lower part (62) through the heating pipeline (80); The cooling pipeline (70) and the heating pipeline (80) have a common pipeline; The compressed air energy storage power generation system further comprises a water pump (170), and the water pump (170) is arranged on the common pipeline; when the compressed air energy storage power generation system is storing heat, the water pump (170) can provide a flow force for the second hot water to flow from the lower part (62) to the upper part (61); when the compressed air energy storage power generation system is generating electricity, the water pump (170) can provide a flow force for the first hot water to flow from the upper part (61) to the lower part (62); The cooling pipeline (70) and the heating pipeline (80) have a first common pipeline, a second common pipeline and a third common pipeline, the cooling pipeline (70) also includes a first connecting pipeline, a second connecting pipeline and a third connecting pipeline, and the heating pipeline (80) also includes a fourth connecting pipeline, a fifth connecting pipeline and a sixth connecting pipeline; the first common pipeline is connected to the upper part (61), and the second common pipeline is connected to the lower part (62); the first connecting pipeline connects the second common pipeline and the third common pipeline, the second connecting pipeline connects the third common pipeline and one end of the first cooler (20), and the third connecting pipeline connects the other end of the first cooler (20) and the first common pipeline; the fourth connecting pipeline connects the first common pipeline and the third common pipeline, the fifth connecting pipeline connects the third common pipeline and one end of the first heater (40), and the sixth connecting pipeline connects the other end of the first heater (40) and the second common pipeline.

2. The compressed air energy storage power generation system according to claim 1, characterized in that: A first valve (180) is installed on the cooling pipeline (70), and the first valve (180) is used to control the on-off of the cooling pipeline (70).

3. The compressed air energy storage power generation system according to claim 1, characterized in that: A second valve (190) is installed on the heating pipeline (80), and the second valve (190) is used to control the on / off of the heating pipeline (80).

4. The compressed air energy storage power generation system according to claim 1, characterized in that: The invention also includes a second cooler (90), which is arranged between the air compressor (10) and the first cooler (20). The compressed air compressed by the air compressor (10) is cooled by the second cooler (90) and then enters the first cooler (20) for cooling.

5. The compressed air energy storage power generation system according to claim 4, characterized in that: The invention also includes a third cooler (110), which is arranged between the first cooler (20) and the storage structure (30). The compressed air cooled by the first cooler (20) flows to the storage structure (30) after being cooled by the third cooler (110).

6. The compressed air energy storage power generation system according to claim 1, characterized in that: The invention also includes a second heater (120), which is arranged between the first heater (40) and the air turbine generator (50), and the second heater (120) is used to heat the compressed air after passing through the first heater (40).

7. The compressed air energy storage power generation system according to claim 1, characterized in that: The first temperature is 90°C, and the second temperature is 60°C.

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