Compressed gas energy storage tunnel structure and intensive layout method

Abstract

The present invention relates to a compressed air energy storage tunnel structure and an intensive layout method. The compressed air energy storage tunnel structure includes multiple air storage chambers and a central vertical shaft. The air storage chambers are distributed in an annular manner to form an annular energy storage area. The central vertical shaft is located at the center of the annular energy storage area. A confluence channel is formed between the annular energy storage area and the central vertical shaft. Each of the air storage chambers is connected to the confluence channel through an external connecting channel, and the confluence channel is connected to the central vertical shaft through an internal connecting channel. The compressed air energy storage tunnel structure and intensive layout method provided by the present invention solve the problem of how to reduce the loss during high-pressure air transmission, reduce construction cross-operation and waiting time, and improve the overall operation and power generation efficiency of the compressed air energy storage system.

Description

Technical Field

[0001] The present invention relates to the technical field of underground compressed gas energy storage technology, and in particular to a compressed gas energy storage tunnel structure and an intensive layout method. Background Art

[0002] Compressed air energy storage technology, as an innovative way to store and convert energy, relies on the use of compressed air as an energy carrier. During the energy storage phase, the air is compressed in a chamber; during the energy release phase, the stored high-pressure air is released and mixed with a small amount of gas fuel, which then rapidly expands and produces work, thereby driving the generator to generate electricity. Currently, underground chambers used for compressed air energy storage are generally tunnel-type or large tank-type. Please refer to the attached Figure 1 , usually buried deep, during the construction process, auxiliary tunnels such as vertical shafts 8 and inclined shafts are needed as construction work channels. However, when combined with the structural arrangement of vertical shafts 8 and other structures, the conventional compressed gas energy storage tunnel structure and layout have the following problems:

[0003] 1. High energy loss: The need to maintain a safe clearance between each gas storage cavern 1 directly increases the length of the passages connecting the gas storage caverns 1 (paths through some traffic tunnels 6 and corridors 7). During the process of transporting high-pressure air, the long pipelines increase air resistance and reduce power generation efficiency.

[0004] 2. Low construction efficiency: When using a vertical shaft 8 as a construction channel, all the debris and raw materials in the gas storage cavern 1 need to be transported through a single long traffic tunnel 6, which prolongs the project cycle and greatly limits the construction speed and quality. Summary of the Invention

[0005] The main purpose of this invention is to propose a compressed air energy storage tunnel structure and an intensive layout method, aiming to solve the problem of how to reduce the loss during high-pressure air transmission, reduce construction cross-operations and waiting time, and improve the overall operating power generation efficiency of the compressed air energy storage system.

[0006] To achieve the above-mentioned objectives, the present invention proposes a compressed air energy storage tunnel structure, comprising a plurality of air storage caverns and a central vertical shaft, wherein the air storage caverns are distributed in an annular manner to form an annular energy storage area, and the central vertical shaft is arranged at the center of the annular energy storage area. A confluence channel is formed between the annular energy storage area and the central vertical shaft, and each of the air storage caverns is connected to the confluence channel through an external connecting channel, and the confluence channel is connected to the central vertical shaft through an internal connecting channel.

[0007] According to some embodiments of the present invention, the confluence channel is arranged in a ring shape and is concentric with the annular energy storage area.

[0008] According to some embodiments of the present invention, 1≤m≤n, wherein m is the number of the internal connecting channels, n is the number of the external connecting channels, and n is also the number of the gas storage chambers.

[0009] According to some embodiments of the present invention, the extension line of each of the external connecting channels passes through the center of the converging channel, and the extension line of the internal connecting channel also passes through the center of the converging channel.

[0010] According to some embodiments of the present invention, a plurality of internal connecting channels are provided, the number of the internal connecting channels is the same as the number of the external connecting channels and corresponds one to one, and each internal connecting channel is located on the same straight line as the corresponding external connecting channel.

[0011] According to some embodiments of the present invention, the minimum spacing between each of the gas storage chambers is B=2(R+L1+d+L2)sin(π / n)-Dcos(π / n), B≥B1, wherein D is the end face diameter of the gas storage chamber, L2 is the length of the external connecting channel, L1 is the length of the internal connecting channel, d is the annular diameter of the confluence channel, R is the radius of the central shaft, and B1 is the safe clearance.

[0012] According to some embodiments of the present invention, the actual floor area of ​​the compressed gas energy storage tunnel structure is S=π(R+L1+d+L2+L3) 2 , S<S1, where L2 is the length of the external connecting channel, L1 is the length of the internal connecting channel, L3 is the length of the gas storage cavern, d is the annular diameter of the confluence channel, R is the radius of the central shaft, and S1 is the maximum area determined based on the actual site range limitations.

[0013] According to some embodiments of the present invention, each of the external connecting channels is provided with a valve.

[0014] The present invention also provides an intensive arrangement method based on the above-mentioned compressed gas energy storage tunnel structure, comprising the following steps:

[0015] S10: Excavation and construction of the central shaft;

[0016] S20: Simultaneously excavate and construct each internal connecting channel, and connect one end of each internal connecting channel to the central vertical shaft;

[0017] S30: excavating a confluence channel, and connecting the other end of the inner connecting channel to the confluence channel;

[0018] S40: excavating each external connection channel simultaneously, and connecting one end of each external connection channel to the confluence channel;

[0019] S50: excavating the gas storage caverns simultaneously, and connecting the other ends of the external connection channels to the gas storage caverns.

[0020] According to some embodiments of the present invention, before step S10, the method further includes:

[0021] The volume and number of air storage chambers are determined according to the volume of compressed air required to be stored.

[0022] According to some embodiments of the present invention, after the step of determining the volume and number of the air storage chambers according to the volume of compressed air to be stored, the method further includes:

[0023] The number of internal connecting channels is determined according to the volume and number of gas storage caverns.

[0024] The present invention has at least the following beneficial effects:

[0025] In the present invention, by introducing the concept of intensive layout, each of the gas storage caverns is distributed in an annular space to form an annular energy storage area. The central shaft is located at the center of the annular energy storage area. A confluence channel is formed between the annular energy storage area and the central shaft. Each of the gas storage caverns is connected to the confluence channel through an external connecting channel, and the confluence channel is connected to the central shaft through an internal connecting channel. Compared with the conventional compressed gas energy storage tunnel structure and layout method, the distance between each gas storage cavern and the central shaft is the same, which reduces the length of the connecting channel. Moreover, through the setting of the confluence channel, the nodes of the gas storage caverns communicating with each other are increased, thereby increasing the gas transmission efficiency and improving the compressed gas energy storage power generation efficiency. Moreover, during the construction phase, it is beneficial to the transportation of construction waste and raw materials, facilitates the synchronous operation of each gas storage cavern, and saves project costs. In addition, the annular intensive arrangement of the compressed gas energy storage tunnel structure effectively reduces the project footprint and greatly increases the flexibility of the site selection of the underground compressed gas energy storage tunnel structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a schematic diagram of the structural layout of a conventional compressed gas energy storage tunnel structure;

[0028] Figure 2 A schematic structural diagram of a compressed air energy storage tunnel structure provided by an embodiment of the present invention;

[0029] Figure 3 A schematic structural diagram of another compressed air energy storage tunnel structure provided by an embodiment of the present invention;

[0030] Figure 4 for Figure 2 Schematic diagram of the connections of each part.

[0031] Description of reference numerals:

[0032] 100-compressed gas energy storage tunnel structure; 1-gas storage cavern; 2-central vertical shaft; 3-convergence channel; 4-external connecting channel; 5-internal connecting channel; 6-traffic tunnel; 7-corridor; 8-vertical shaft. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] The present invention provides a compressed air energy storage tunnel structure. Figure 1 This is a schematic diagram of the structural layout of a conventional compressed gas energy storage tunnel structure. Figure 2-Figure 4 This is a specific embodiment of a compressed air energy storage tunnel structure provided by the present invention.

[0037] like Figure 1 The gas storage path of the conventional compressed gas energy storage tunnel structure is as follows: the high-pressure gas is sent down from the vertical shaft 8, passes through the traffic tunnel 6, and is then sent to each gas storage cavern 1 through the corridors 7 connected to the traffic tunnel 6.

[0038] like Figure 2 An embodiment of the present invention provides a compressed air energy storage tunnel structure 100, comprising a plurality of gas storage caverns 1 and a central vertical shaft 2. The gas storage caverns 1 are arranged in an annular pattern to form an annular energy storage area. The central vertical shaft 2 is located at the center of the annular energy storage area. A confluence channel 3 is formed between the annular energy storage area and the central vertical shaft 2. The gas storage caverns 1 are connected to the confluence channel 3 via an external connecting channel 4, and the confluence channel 3 is connected to the central vertical shaft 2 via an internal connecting channel 5.

[0039] In the present invention, by introducing the concept of intensive layout, compared with the conventional compressed gas energy storage tunnel structure and layout method, each of the gas storage caverns 1 is distributed in an annular interval to form an annular energy storage area, and the central vertical shaft 2 is arranged at the center of the annular energy storage area. The intensive annular layout shortens the distance between the central vertical shaft 2 and each gas storage cavern 1, and reduces the length of the connection channel between each gas storage cavern 1 and the central vertical shaft 2. In addition, the distance between each gas storage cavern 1 and the central vertical shaft 2 is the same, which is conducive to the synchronous storage and release of compressed gas, and through the setting of the confluence channel 3 and the internal The connecting channel 5 and the external connecting channel 4 increase the nodes for the interconnection of the gas storage caverns 1, further increasing the gas transmission efficiency, thereby improving the compressed gas energy storage power generation efficiency. Moreover, during the construction phase, compared with the layout of conventional compressed gas energy storage tunnel structures, which often use a single long traffic tunnel 6 to transport slag and raw materials, the various gas storage caverns 1 of the present invention are arranged in a ring and can be excavated simultaneously. In addition, combined with the interconnection of the confluence channel 3, the external connecting channel 4, and the internal connecting channel 5, it is conducive to the transportation of construction slag and raw materials, facilitates the synchronous operation of each gas storage cavern 1, and saves project costs. In addition, the annular intensive arrangement of the compressed gas energy storage tunnel structure 100 effectively reduces the project footprint and greatly increases the flexibility of the site selection of the underground compressed gas energy storage tunnel structure 100.

[0040] It can be understood that in the present application, the specific forms of the confluence channel 3, the internal connecting channel 5 and the external connecting channel 4 are not limited. In some embodiments, the confluence channel 3 includes a corridor formed underground or a pipe arranged underground; and / or, the internal connecting channel 5 includes a corridor formed underground or a pipe arranged underground; and / or, the external connecting channel 4 includes a corridor formed underground or a pipe arranged underground.

[0041] It should be noted that, in the present application, the number of the internal connecting channels 5 is not specifically limited. In some embodiments, 1≤m≤n, wherein m is the number of the internal connecting channels 5, n is the number of the external connecting channels 4, and n is also the number of the gas storage caverns 1, that is, the number of the internal connecting channels 5 can be the same as the number of the gas storage caverns 1, or can be less than the number of the gas storage caverns 1, and is specifically selected according to conditions such as the number and volume of the gas storage caverns 1. For example, when the number of gas storage caverns 1 is large and / or the volume is large, a small number of the internal connecting pipelines is difficult to meet the transmission efficiency of the high-pressure gas, and the number of internal connecting channels 5 can be increased; and when only one of the internal connecting channels 5 can meet the gas transmission requirements to achieve the required power generation, only a single internal connecting channel 5 can be excavated to save costs. It can be understood that under the action of the confluence channel 3, only one of the internal connecting channels 5 can also transmit the high-pressure gas to each of the gas storage caverns 1 through the external connecting channels 4 respectively connected to the confluence channel 3.

[0042] Specifically, in some embodiments, the confluence channel 3 is arranged in a ring shape and is concentrically arranged with the annular energy storage area. The annular channel is conducive to the flow of gas to improve the gas transmission efficiency, and can ensure that the closest distance between each gas storage chamber 1 on the concentric ring and the confluence channel 3 is the same, which is conducive to the layout of the external connecting channel.

[0043] Specifically, in some embodiments, the extension line of each of the external connection channels 4 passes through the center of the confluence channel 3, and the extension line of the internal connection channel 5 also passes through the center of the confluence channel 3. In this way, it is possible to ensure that each of the external connection channels 4 and the internal connection channels 5 are of the minimum length, reducing the gas transmission distance, thereby improving the efficiency of compressed gas energy storage power generation. It is also possible to ensure that the lengths of each of the external connection channels 4 are the same, which is conducive to the synchronous excavation of each of the external connection channels 4. When the construction is completed and the operation stage is reached, high-pressure gas can be synchronously input from each of the gas storage caverns 1 to the confluence channel 3, improving the stability of gas output, thereby dispersing risks and avoiding the stability of the entire compressed gas energy storage system power generation being affected by the failure of a single gas storage cavern 1. Similarly, when multiple internal connection channels 5 are provided, the beneficial effects of the external connection channels 4 described above are also achieved.

[0044] Specifically, in some embodiments, a plurality of internal connecting channels 5 are provided, and the number of the internal connecting channels 5 is the same as the number of the external connecting channels 4 and corresponds one to one. Each of the internal connecting channels 5 is located on the same straight line as the corresponding external connecting channels 4. By providing a plurality of internal connecting channels 5, the efficiency of the central shaft 2 in outputting or receiving high-pressure gas to the internal connecting channels 5 can be improved, thereby improving storage efficiency and power generation efficiency. Moreover, because each of the internal connecting channels 5 is located on the same straight line as the corresponding external connecting channels 4, the shortest gas connection channel can be formed between the central shaft 2 and each of the gas storage chambers 1, thereby reducing the transmission path and thus reducing the energy loss caused by overcoming air resistance. It is also worth mentioning that Yes, each of the gas storage chambers 1 is equipped with a one-to-one corresponding external connecting channel 4 and the internal connecting channel 5, which can synchronously input or output high-pressure gas. When gas is input for energy storage, a large amount of high-pressure gas can be quickly stored. When gas output is required to release energy, it can also be output synchronously, which greatly improves the response speed of the compressed gas energy storage system. It can also disperse risks and improve the stability of power generation, and avoid the stability of power generation of the entire compressed gas energy storage system due to the failure of a single gas storage chamber 1. In addition, the high-pressure gas in the central vertical shaft 2 can be directly transmitted radially to the external connecting channel 4 through the internal connecting channel 5 to be transported to each of the gas storage chambers 1, and there is no need to transport it in an annular direction through the confluence channel 3, which also greatly improves the gas transmission efficiency.

[0045] The compressed air energy storage tunnel structure 100 provided by the present invention has two gas storage paths. One is: Figure 2 The arrow indicates the direction of gas flow. High-pressure gas is sent down from the central shaft 2, passes through the internal connecting channel 5 and its corresponding external connecting channel 4, and is directly sent to the gas storage chamber 1 in the radial direction. Figure 3 The arrows indicate the direction of gas flow. High-pressure gas is sent down from the central shaft 2, radially passes through the inner connecting channel 5, and circumferentially passes through the converging channel 3 connected thereto, and then radially passes through the outer connecting channel 4 to be sent to the gas storage cavern 1. The transportation path of high-pressure air in the energy release stage is the same as that in the energy storage stage, but in the opposite direction. Figure 1Compared with the conventional compressed air energy storage tunnel structure shown in the figure, which relies only on a single narrow traffic tunnel 6 for high-pressure air transportation, the flexibility of the interconnection between the structures is enhanced, and the power generation efficiency is improved. It can be understood that when the number of internal connecting channels 5 is less than the external connecting channels 4, the two paths run simultaneously, and the gas storage caverns 1 that are not provided with corresponding internal connecting channels 5 require the confluence channel 3 to circulate along the annular direction. When the number of the internal connecting channels 5 is the same as the number of the external connecting channels 4 and corresponds one to one, and each of the internal connecting channels 5 is located on the same straight line as the corresponding external connecting channels 4 and is parallel to the radial direction of the central shaft 2, the gas can be directly sent radially from the internal connecting channel 5 to the corresponding external connecting channel 4.

[0046] Specifically, in order to ensure that there is a sufficient safety distance between each of the gas storage chambers 1, in some embodiments, the minimum spacing between each of the gas storage chambers 1 is B=2(R+L1+d+L2)sin(π / n)-Dcos(π / n), B≥B1, wherein D is the end face diameter of the gas storage chamber 1, L2 is the length of the external connecting channel 4, L1 is the length of the internal connecting channel 5, d is the annular diameter of the confluence channel, R is the radius of the central shaft, and B1 is the safety clearance. The specific value of the safety clearance is mainly calculated based on actual conditions. The calculation method is existing technology and will not be repeated here.

[0047] Specifically, in some embodiments, the actual floor area of ​​the compressed gas energy storage tunnel structure 100 is S=π(R+L1+d+L2+L3) 2 , S<S1, where L2 is the length of the external connecting channel 4, L1 is the length of the internal connecting channel 5, L3 is the length of the gas storage cavern 1, d is the annular diameter of the confluence channel, R is the radius of the central shaft 2, S1 is the maximum area determined based on the actual site range limitation, and the specific value of S1 is mainly framed according to the actual site conditions.

[0048] Specifically, in order to further reduce the length of the connecting channel, in some embodiments, the gas inlet and outlet of each of the gas storage chambers 1 are respectively oriented toward the center of the annular energy storage area.

[0049] Specifically, in some embodiments, each of the external connecting channels 4 is provided with a valve. By controlling the valves on each of the external connecting channels 4 respectively, the input and output of gas in the gas storage chambers in different areas can be controlled according to demand, thereby improving the flexibility and adaptability of the compressed gas energy storage system. Moreover, when it is necessary to inspect and repair the gas storage chamber or related equipment, the valve can be controlled to isolate the inspection area to ensure the safe progress of the inspection work.

[0050] The present invention also provides an intensive arrangement method based on the above-mentioned compressed gas energy storage tunnel structure 100, comprising the following steps:

[0051] S10: Excavation and construction of central shaft 2;

[0052] It should be noted that the central shaft 2 should be located at the center of the overall structure of the compressed gas energy storage tunnel. Therefore, before actual construction, the actual construction area and the center position should be determined.

[0053] S20: Simultaneously excavate and construct each internal connecting channel 5, and connect one end of each internal connecting channel 5 with the central shaft 2;

[0054] It is understandable that there is no specific limit to the number of internal connecting channels 5, and the number can be selected according to specific needs. It is worth mentioning that because the internal connecting channels 5 are adjacent to the central shaft 2, when the internal connecting channels 5 are excavated, the slag and raw materials can be transported directly through the central shaft 2, which greatly improves the material transportation efficiency, and multiple internal connecting channels 5 can be excavated simultaneously in the circumference of the central shaft 2, which greatly improves the construction efficiency and reduces the construction time.

[0055] S30: excavating the confluence channel 3 and connecting the other end of the inner connecting channel 5 to the confluence channel 3;

[0056] It is understandable that when the confluence channel 3 is excavated, the completed internal connecting channel 5 can provide a material conveying channel therefor.

[0057] S40: excavating the external connection channels 4 simultaneously, and connecting one end of each external connection channel 4 with the confluence channel 3;

[0058] It is understandable that when the external connecting channel 4 is excavated, the completed internal connecting channel 5 and the confluence channel 3 can provide it with a material conveying channel and temporary storage function.

[0059] S50: excavating the gas storage caverns 1 simultaneously, and connecting the other ends of the external connection channels 4 with the gas storage caverns 1.

[0060] It can be understood that the safety distance B between each of the gas storage caverns needs to be calculated before excavation, and the spacing B between each of the gas storage caverns 1 is ≤2(R+L1+d+L2)sin(π / n)-Dcos(π / n), wherein D is the end face diameter of the gas storage cavern 1, L2 is the length of the external connecting channel 4, L1 is the length of the internal connecting channel 5, d is the annular diameter of the confluence channel, and R is the radius of the central vertical shaft 2.

[0061] In the technical solution provided by the present invention, a central vertical shaft 2 is excavated and constructed; internal connecting channels 5 are excavated and constructed simultaneously, and one end of each internal connecting channel 5 is connected to the central vertical shaft 2; a confluence channel 3 is excavated, and the other end of the internal connecting channel 5 is connected to the confluence channel 3; external connecting channels 4 are excavated simultaneously, and one end of each external connecting channel 4 is connected to the confluence channel 3; and gas storage caverns 1 are excavated simultaneously, and the other end of each external connecting channel 4 is connected to the gas storage cavern 1. By using a synchronous excavation method that diffuses from the center to the outside, combined with the method of utilizing the already constructed vertical shafts and some channels as material transportation channels, the construction efficiency is greatly improved, thereby reducing the construction period.

[0062] Specifically, in some embodiments, before step S10, the process further includes determining the volume and number of the gas storage chambers 1 based on the volume of compressed air to be stored. This allows for a reasonable layout to be planned in advance to ensure that the volume of the gas storage chambers 1 matches the energy storage requirements, avoiding energy waste or insufficiency caused by overly large or undersized chambers. A reasonable layout of the volume and number of chambers can optimize the energy conversion efficiency during air compression and release, thereby improving the efficiency of the overall energy storage system.

[0063] Furthermore, it should be noted that in the present application, the number of the internal connecting channels 5 is not limited. In some embodiments, 1≤m≤n, wherein m is the number of the internal connecting channels 5, n is the number of the external connecting channels 4, and n is also the number of the air storage chambers 1, that is, the number of the internal connecting channels 5 can be the same as the number of the air storage chambers 1, or can be less than the number of the air storage chambers 1. Therefore, in the present application, after the step of determining the volume and number of the air storage chambers 1 according to the volume of compressed air to be stored, it also includes determining the number of internal connecting channels 5 according to the volume and number of the air storage chambers 1. In this way, a more reasonable layout can be made according to actual storage needs. For example, when the number of gas storage caverns 1 is large and / or the volume is large, that is, the demand for gas storage is large, a smaller number of the internal connecting pipelines cannot meet the transmission efficiency of high-pressure gas, and the number of internal connecting channels 5 can be increased; and when only one of the internal connecting channels 5 can meet the gas transmission demand to achieve the required power generation, only a single internal connecting channel 5 can be excavated to save costs, because under the action of the confluence channel 3, only one of the internal connecting channels 5 can transmit the high-pressure gas to each of the gas storage caverns 1 through the external connecting channels 4 respectively connected to the confluence channels 3.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A compressed air energy storage tunnel structure, characterized in that: The invention comprises a plurality of gas storage caverns and a central vertical shaft, wherein the gas storage caverns are arranged in an annular manner to form an annular energy storage area, the central vertical shaft is located at the center of the annular energy storage area, a confluence channel is formed between the annular energy storage area and the central vertical shaft, and each gas storage cavern is connected to the confluence channel through an external connecting channel, and the confluence channel is connected to the central vertical shaft through an internal connecting channel; The confluence channel is arranged in an annular shape and is concentric with the annular energy storage area; The extension lines of the external connecting channels all pass through the center of the converging channel, and the extension lines of the internal connecting channels also pass through the center of the converging channel; The minimum spacing between the gas storage caverns is B=2(R+L1+d+L2)sin(π / n)-Dcos(π / n), B≥B1, where D is the end diameter of the gas storage cavern, L2 is the length of the external connecting channel, L1 is the length of the internal connecting channel, d is the annular diameter of the confluence channel, R is the radius of the central shaft, and B1 is the safe clearance. 1≤m≤n, wherein m is the number of the internal connecting channels, n is the number of the external connecting channels, and n is also the number of the gas storage chambers.

2. The compressed air energy storage tunnel structure according to claim 1, characterized in that: The actual floor area of ​​the compressed gas energy storage tunnel structure is S=π(R+L1+d+L2+L3) 2 , S<S1, where L2 is the length of the external connecting channel, L1 is the length of the internal connecting channel, L3 is the length of the gas storage cavern, d is the annular diameter of the confluence channel, R is the radius of the central shaft, and S1 is the maximum area determined based on the actual site range limitations.

3. An intensive arrangement method of a compressed gas energy storage tunnel structure according to any one of claims 1 or 2, characterized in that: The following steps are involved: S10: Excavation and construction of the central shaft; S20: Simultaneously excavate and construct each internal connecting channel, and connect one end of each internal connecting channel to the central vertical shaft; S30: excavating a confluence channel, and connecting the other end of the inner connecting channel to the confluence channel; S40: excavating each external connection channel simultaneously, and connecting one end of each external connection channel to the confluence channel; S50: excavating the gas storage caverns simultaneously, and connecting the other ends of the external connection channels to the gas storage caverns.

4. The intensive layout method according to claim 3, characterized in that: Before step S10, the method further includes: The volume and number of air storage chambers are determined according to the volume of compressed air required to be stored.

5. The intensive layout method according to claim 4, characterized in that: After the step of determining the volume and number of the air storage chambers according to the volume of compressed air to be stored, the method further includes: The number of internal connecting channels is determined according to the volume and number of gas storage caverns.

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