Compressed air energy storage power station tunnel type artificial cavern temperature control structure

Abstract

The utility model discloses a compressed air energy storage power station tunnel type artificial garage temperature control structure which is characterized in that one end of a tunnel type artificial garage is provided with an inflation inlet pipe, a one-stage or multi-stage temperature control pipe is arranged in the tunnel type artificial garage, and the temperature control pipe extends from the inflation inlet pipe to the other end close to the tunnel type artificial garage; a gap or a through hole used for communicating the inner side and the outer side of the temperature control pipe is formed between the inflation inlet pipe and the temperature control pipe. According to the utility model, the temperature can be uniformly distributed during air inflation in the garage; the structure is simple enough, low in manufacturing cost, convenient to construct and convenient for later maintenance; the energy storage capacity occupation of the power station is reduced; the shape or other mechanical properties of the garage are not affected, and site selection of the garage is facilitated; a great deal of processing cost can be saved, and the construction difficulty of temperature control measures and the garage is reduced; mechanical equipment in a moving state does not exist on the pipeline, so that the maintenance cost is lower; and the pipeline can be bent, only the connection condition needs to be met, the project site selection limitation is weakened, and practical application is easy.

Description

TECHNICAL FIELD

[0001] The utility model belongs to compressed air energy storage technical field, concretely relates to a compressed air energy storage power station tunnel type artificial cavern temperature control structure. BACKGROUND

[0002] Compressed air energy storage technology is a large and long time energy storage and power generation technology, and its technical principle is that in the stage of abandoned wind, abandoned light and low valley electricity, air is compressed by a compressor driven by electric energy and is sent to an underground gas storage for storage; when the electricity peak period comes, the high pressure air in the gas storage is heated by a heat exchanger or a combustion chamber and is sent to an expander to drive a generator to generate electricity, so that the energy peak shaving function is realized. The underground gas storage of compressed air energy storage power station is mainly a salt cavern gas storage, but the salt cavern gas storage is obviously limited by geographical environment, and the area where the compressed air energy storage power station needs to be built may have no salt cavern distribution, so that the underground gas storage cannot be built. In addition to the salt cavern gas storage, in recent years, the underground artificial cavern is also an important choice of the compressed air energy storage power station, which is an artificial excavation of a gas storage structure (cavern) with a certain volume in the underground hard rock. According to the shape of the gas storage, the underground artificial cavern can be divided into two forms of large tank type and tunnel type.

[0003] The basic structure of the tunnel type artificial cavern is as shown in Figure 5 , which can be simplified as shown in Figure 6 , wherein the parameter similar to L / D can be explained as the length-diameter ratio of the artificial cavern. Although the artificial cavern with small length-diameter ratio can better control the problem of heat concentration, the construction method of the underground railway of the mine is not suitable for the tunnel excavation construction of the artificial cavern with small length-diameter ratio. Although the tunnel type artificial cavern with large length-diameter ratio can be constructed by referring to the mine construction technology, in the operation process of the energy storage power station, the air continuously flows to the inside in the air injection process, so that the air at the tail of the energy storage power station is continuously compressed and cannot form heat exchange with the air at the inlet end. As shown in Figure 7 , research shows that the energy storage cavern with large length-diameter ratio will have a serious local heat accumulation problem at the first time of air charging, which leads to uneven heat distribution of the cavern, which is commonly known as "braising head effect". Under this heat distribution, the structure layer of the cavern wall and the surrounding rock are distorted due to the "thermal expansion and cold shrinkage" effect, so that the distortion energy of the structure layer of the cavern is large, which seriously affects the service life and safety of the operation of the cavern. According to the calculation, the absolute temperature difference between the inlet end and the tail of the energy storage power station cavern with a length-diameter ratio of more than 10 is greater than 300K. This is obviously not conducive to the continuous operation of the compressed air energy storage power station. How to make the air flow field in the cavern uniform in heat distribution by equipment without changing the basic shape parameters of the cavern is a key problem to be solved in engineering.

[0004] In order to solve the above problems, previous people have taken various temperature control measures, such as using rock or rock-like material to store heat and conduct heat, using metal material to conduct heat, adding water cooling pipeline loop, optimizing air pipeline nozzle and cavern shape and the like. These existing schemes more or less have problems of construction difficulty, high maintenance cost, occupied capacity and the like. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a compressed air energy storage power station tunnel type artificial cavern temperature control structure, to solve the problems of construction difficulty, high maintenance cost or occupied capacity of the existing compressed air energy storage artificial cavern temperature control measures, to reduce construction and maintenance cost, reduce measure complexity and reduce temperature control measure capacity occupation while ensuring small temperature difference inside the tunnel type artificial cavern during work.

[0006] According to the technical scheme of the utility model, the utility model provides a compressed air energy storage power station tunnel type artificial cavern temperature control structure, which has an inflation inlet pipe at one end of the tunnel type artificial cavern, and one or more temperature control pipes are arranged in the tunnel type artificial cavern, the temperature control pipe extends from the inflation inlet pipe to the other end of the tunnel type artificial cavern, and the inflation inlet pipe and the temperature control pipe have a gap or a through hole for connecting the inside and the outside of the temperature control pipe.

[0007] Preferably, the temperature control pipe is a multi-stage pipeline which is connected in sequence; the size of the outlet of the upper stage pipeline on the upstream side of the inflation direction is smaller than the size of the inlet of the lower stage pipeline on the downstream side of the inflation direction.

[0008] Further, the gap between the upper stage pipeline outlet and the lower stage pipeline inlet connects the inside and the outside of the temperature control pipe.

[0009] According to some embodiments, the outlet of the upper stage pipeline is contracted near the inlet of the lower stage pipeline, and / or the inlet of the lower stage pipeline is expanded near the outlet of the upper stage pipeline.

[0010] According to some embodiments, the pipe diameter of the multi-stage pipeline gradually increases from the upstream side to the downstream side of the inflation direction.

[0011] According to some embodiments, the size of the outlet of the inflation inlet pipe is smaller than the size of the inlet of the temperature control pipe. According to some embodiments, the outlet of the inflation inlet pipe is contracted near the inlet of the temperature control pipe, and / or the outlet of the inflation inlet pipe is expanded near the inlet of the temperature control pipe.

[0012] According to some embodiments, the inner wall of the temperature control pipe is provided with a protrusion or a spiral flow channel.

[0013] According to some embodiments, the temperature control pipe is connected to the top of the tunnel type artificial cavern through a hoisting structure, and / or the temperature control pipe is connected to the bottom of the tunnel type artificial cavern through a supporting structure.

[0014] Further, the positions of the air charging inlet pipe and the temperature control pipe correspond to the middle part of the cross section shape of the tunnel type artificial cavern; the side surface of the temperature control pipe and the end part away from the air charging inlet pipe form a space for air flow circulation and mixing with the tunnel type artificial cavern.

[0015] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0016] The compressed air energy storage power station tunnel type artificial cavern temperature control structure can preferably meet the functional requirements of the temperature control equipment, including: (1) achieving uniform temperature distribution of the cavern interior during air charging; (2) the equipment is simple enough, low in cost, convenient for construction, and convenient for later maintenance; (3) occupying as little cavern volume as possible to reduce the energy storage capacity occupation of the power station; (4) the equipment should not affect the cavern shape or other mechanical properties as much as possible to facilitate cavern site selection. The structure adopted by the utility model uses only one or more levels of pipes, and the pipe shapes are similar, which can save a large amount of processing cost and reduce the construction difficulty of the temperature control measures and the cavern; there is no mechanical equipment in motion state on the pipeline, and the maintenance cost is lower; the pipeline itself can be bent, only needs to meet the connection conditions, weakens the engineering site selection restriction, and is easy to apply in practice. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a tunnel type artificial cavern temperature control structure schematic diagram provided by the utility model.

[0018] Figure 2 is a three-dimensional schematic diagram of the tunnel type artificial cavern temperature control structure provided by the utility model.

[0019] Figure 3 is a three-dimensional schematic diagram of the tunnel type artificial cavern temperature control structure of another embodiment provided by the utility model.

[0020] Figure 4 is a tunnel type artificial cavern temperature control structure schematic diagram provided by the utility model.

[0021] Figure 5 is a basic structure schematic diagram of the existing tunnel type artificial cavern.

[0022] Figure 6 is a simplified structure schematic diagram of the tunnel type artificial cavern.

[0023] Figure 7 is a temperature distribution diagram of the existing tunnel type artificial cavern with a large length-diameter ratio.

[0024] Figure 8 is the air pressure field diagram of the inlet end of the tunnel type artificial cavern after injecting air for a period of time according to the tunnel type artificial cavern injection air temperature control structure.

[0025] Figure 9 is the flow field trajectory diagram of the tunnel type artificial cavern according to the tunnel type artificial cavern injection air temperature control structure.

[0026] Figure 10 is the cavern loop cyclone diagram of the tunnel type artificial cavern according to the tunnel type artificial cavern injection air temperature control structure.

[0027] Figure 11 is the temperature distribution diagram of the cavern with the same parameters after adopting the temperature control structure of the utility model. Figure 7

[0028] Explanation of reference numerals in the drawings:

[0029] 1, tunnel type artificial cavern; 2, air charging inlet pipe; 3, temperature control pipe; 4, upper stage pipe outlet; 5, lower stage pipe inlet; 6, hoisting structure. DETAILED DESCRIPTION

[0030] The utility model provides a kind of compressed air energy storage power station tunnel type artificial cavern temperature control structure, solve the construction difficulty, maintenance cost high or occupy reservoir capacity of the existing compressed air energy storage artificial cavern temperature control measure, reduce construction maintenance cost, reduce measure complexity, reduce temperature control measure reservoir capacity occupation while realizing the smaller temperature difference in tunnel type artificial cavern inside during guaranteeing working process.

[0031] Please refer to Figures 1 to 4 , a kind of compressed air energy storage power station tunnel type artificial cavern temperature control structure of the utility model, in one end of tunnel type artificial cavern 1 with air charging inlet pipe 2, be provided with one stage or multistage temperature control pipe 3 in tunnel type artificial cavern 1, for example Figure 1 、 Figure 4 As shown in the embodiment, temperature control pipe 3 is one stage (one section) pipe, Figure 2 、 Figure 3 As shown in the embodiment, temperature control pipe 3 is multistage (multiple sections) pipe;Temperature control pipe 3 is extended to near the other end of tunnel type artificial cavern 1 from air charging inlet pipe 2, air charging inlet pipe 2 and temperature control pipe 3 between there is gap or through hole for the temperature control pipe 3 inside and outside side communication. So as to realize the air flow condition shown by arrow in the figure, i.e. air charging inlet pipe 2 and temperature control pipe 3 are through, air can be directly into, in the last end of temperature control pipe 3 output, and due to the existence of gap or through hole, form internal and external air pressure difference in the corresponding position of temperature control pipe 3 inlet side, and then can guide air to form circulating flow, make the air of tunnel type artificial cavern 1 end reflux can enter temperature control pipe 3, realize mixing flow and heat effect. More specifically, as shown in Figure 5 ​As shown, the tunnel type artificial cavern 1 is located underground, the tunnel type artificial cavern 1 is surrounded by surrounding rock outside, and the tunnel type artificial cavern 1 is connected to the ground through a traffic cave. The traditional tunnel type artificial cavern does not have a temperature control pipe structure inside, so that for a large length-diameter cavern, the temperature difference is large, and the local overheating condition is shown, and the problem is solved by the temperature control pipe 3 through a relatively simple structure. Figure 7 As shown, the temperature difference is large, and the local overheating condition is shown, and the problem is solved by the temperature control pipe 3 through a relatively simple structure.

[0032] Please refer to Figure 1 、 Figure 4 , for the gap between the inflation inlet pipe 2 and the temperature control pipe 3, that is, the inflation inlet pipe 2 is a section of pipe independent of the temperature control pipe 3 and the two are not directly connected, and further optionally, in the tunnel type artificial cavern 1, the outlet of the inflation inlet pipe 2 is flush with the inner wall of the tunnel type artificial cavern 1 (for example Figure 4 As shown) or protrudes from the inner wall of the tunnel type artificial cavern 1 (for example Figure 1 As shown, in other words, it extends into the tunnel type artificial cavern 1). It can be understood that in other embodiments, the inflation inlet pipe 2 and the temperature control pipe 3 are through holes, that is, the through holes are provided on the side wall of the inflation inlet pipe 2 or the temperature control pipe 3, for example, the inflation inlet pipe 2 is a section of pipe independent of the temperature control pipe 3, the two are connected through a connecting structure such as a connecting column, and further form a through hole between the connecting structure, or the inflation inlet pipe 2 and the temperature control pipe 3 are integrated and divided by the through hole.

[0033] Preferably, the size of the outlet of the inflation inlet pipe 2 is smaller than the size of the inlet of the temperature control pipe 3, for example, the outlet of the inflation inlet pipe 2 is contracted near the inlet of the temperature control pipe 3 (for example Figure 1 As shown), and / or the outlet of the inflation inlet pipe 2 is expanded near the inlet of the temperature control pipe 3 (for example Figure 4 As shown). Thus, the flow rate of the inflation inlet pipe outlet airflow is faster than the flow rate of the temperature control pipe inlet airflow, which is more helpful to form a circulating flow of air.

[0034] Please refer to Figure 2 、 Figure 3 , preferably, the temperature control pipe 3 is a plurality of pipe lines connected in sequence, and between adjacent pipe lines, the size of the upper level pipe line outlet 4 of the upper level pipe line on the upstream side of the inflation direction is smaller than the size of the lower level pipe line inlet 5 of the lower level pipe line on the downstream side of the inflation direction. For example, the upper level pipe line outlet 4 is contracted near the lower level pipe line inlet 5, and / or the lower level pipe line inlet 5 is expanded near the upper level pipe line outlet 4. Thus, the flow rate of the upper level airflow is faster than the flow rate of the lower level pipe line airflow. The multi-stage pipe line can realize airflow circulation at a higher length-diameter ratio.

[0035] In the illustrated embodiment, the inter-stage gap is between the outlet 4 of the upper stage and the inlet 5 of the lower stage, in other words, the multi-stage pipeline is multiple segments which are independent of each other, and the adjacent two segments are in flush, spaced or extended (nested) relationship, and the inter-stage gap connects the inside and outside of the temperature control pipe 3. It can be understood that in other embodiments, a through hole can also be used to connect the inside and outside of the temperature control pipe 3, and the through hole is provided in the side wall of the temperature control pipe 3, for example, the multi-stage pipeline is multiple segments, the segments are connected by a connecting structure such as a connecting column, and then the through hole is formed between the connecting structure, or the multi-stage pipeline is integrated and the stages are divided by the through hole, and the gap and the through hole can be used in combination.

[0036] More specifically, for example, Figure 2 In the illustrated embodiment, the main body part of each stage of the pipeline has the same diameter, the outlet 4 of the upper stage is contracted near the inlet 5 of the lower stage, and specifically, it is in the shape of a truncated cone; the end of the outlet 4 of the upper stage is substantially flush with the end of the inlet 5 of the lower stage; the downstream end of the last stage of the pipeline is spaced from the end of the tunnel type artificial cavern 1; the shape of the downstream end of the last stage of the pipeline is not limited, for example, it can be selected to have the same diameter as the rest of the pipeline or be contracted or be expanded.

[0037] For another example Figure 3 In the illustrated embodiment, unlike the foregoing embodiment, the diameter of the multi-stage pipeline gradually increases from the upstream side to the downstream side in the inflation direction, and each stage of the pipeline has the same diameter; the end of the outlet 4 of the upper stage is substantially flush with the end of the inlet 5 of the lower stage, forming a structure in which the inlet 5 of the lower stage is expanded near the outlet 4 of the upper stage.

[0038] It can be understood that in other embodiments, the pipeline circuit of the temperature control pipe 3 can also be bent and folded as necessary to meet the needs of various forms of compressed air energy storage caverns, as long as the principle of using the device described in the utility model is met. The diameter, contraction ratio, and stage length can be determined by numerical simulation analysis according to the diameter, length, and air extraction and inflation conditions of the specific cavern. Optionally, the inner wall of the temperature control pipe 3 is provided with a protrusion or a spiral flow channel (texture), or other structures for blocking or guiding flow, so as to form a rotational flow or a turbulent flow in the pipe, thereby prolonging the flow circuit and helping to fully mix the fluid in the pipeline circuit and shorten the pipeline length.

[0039] For another example Figure 2Optionally, the temperature control pipe 3 is connected to the top of the tunnel type artificial cavern 1 through the hoisting structure 6, and / or the temperature control pipe 3 is connected to the bottom of the tunnel type artificial cavern 1 through the support structure. During construction, the pipe is fixed in the corresponding position by hoisting on the top of the cavern or by supporting at the bottom. It is recommended to use the bottom support scheme for construction in the stratum of high stress or low strength rock mass, so as to avoid the tension of the rock mass on the top of the cavern and adapt to the excavation demand. It can be understood that the temperature control pipe 3 can also be fixed in position in other ways. Generally, the inflation inlet pipe 2 and the tunnel type artificial cavern 1 are fixedly connected in a sealed manner.

[0040] More specifically, the tunnel type artificial cavern 1 is, for example, a columnar shape with smooth curved surfaces at both ends, such as a semicircle or other generally similar shape, and the columnar shape is, for example, a cylinder or other generally similar shape. The scheme can be applied to the tunnel type artificial cavern 1 with a length-diameter ratio of more than 10. The positions of the inflation inlet pipe 2 and the temperature control pipe 3 are preferably corresponding to the middle part of the cross-sectional shape of the tunnel type artificial cavern 1, such as the position of the central axis of the columnar tunnel type artificial cavern 1. The side surface of the temperature control pipe 3 and the end away from the inflation inlet pipe 2 form a space between the tunnel type artificial cavern 1 for the circulation and mixing of air flow, so as to facilitate the uniform mixing of the air in the tunnel type artificial cavern 1 and the injected air and reduce the overall temperature difference.

[0041] The basic principle of the utility model is as follows. Please refer to Figure 1 or Figure 4 , wherein the arrow indicates the path of the flow of air in the cavern. In this path, the compressed air is introduced into the end of the gas storage at the end of the pipeline, and then the compressed air flow of the end returns to the inflow pipeline, and the mixing and heating of the cavern air and the inflow air in the pipeline are realized. Moreover, by using this measure, when the compressed air is injected, the air in the cavern continuously flows and mixes, effectively avoiding the problem of local overheating caused by the "braising head effect". The key of the utility model is to utilize the annular space established by the pipeline and the circulation loop in the pipeline.

[0042] The principle that the pipeline connection part can inhale the cavern air is "siphon effect". In the pipeline connection part, according to Bernoulli equation, the fluid in the pipeline satisfies:

[0043] ,

[0044] , wherein P represents the static water pressure of the current fluid, unit Pa; ρ represents the density of the current fluid, unit kg⁄m 3 ; v represents the flow rate of the current fluid, unit m⁄s; g represents the acceleration of gravity; h represents the height of the fluid in the pipeline, unit m; C represents a constant.

[0045] According to the formula, the faster the fluid velocity in the pipe, the lower the pressure on the streamline, and the fluid flowing in from the side of the pipe tends to be carried by the high-speed fluid. Using this principle, a low-pressure region can be artificially created near the opening on the side of the pipe (i.e., with the aforementioned gap). This causes a backflow in the entire flow field, resulting in a uniformly distributed temperature field.

[0046] According to the designed flow path, air has a high velocity in the narrower intake duct. After flowing out of the inlet duct, the compressed gas mixes with the warm airflow inside the chamber and slows down before entering the next stage duct. Inside the duct, the gas is thoroughly mixed and flows towards the end of the chamber, continuously applying pressure to the end section and forming a high-pressure area. In the annular space formed by the chamber and the outside of the duct, due to the presence of the low-pressure area near the intake and the high-pressure area at the end of the chamber, the gas inside the chamber continuously flows towards the vicinity of the intake, forming a circulating flow loop for compressed air.

[0047] The inlet air pressure field after a period of air injection was obtained using CFD calculations, as shown below. Figure 8 As shown. According to Figure 8 The air pressure field shown indicates that a localized low-pressure region exists between the annulus formed by the pipe and the chamber wall, and the gas in the annulus tends to flow from the outlet to the inlet. Inside the pipe, the inlet pressure is higher, creating a tendency for air to flow towards the outlet. Extracting the current flow field traces can further clarify the direction of fluid movement, such as... Figure 9 As shown. Calculations show that the current annular fluid does indeed flow back from the end of the pipe to the pipe connection point. This creates a circulating airflow within the chamber. The calculated chamber loop cyclone is as follows: Figure 10 As shown, the airflow circuit implemented using the structure of this invention can effectively control the temperature of the compressed air energy storage artificial chamber. The faster the inflation speed, the better the heat dissipation effect. CFD calculations show that, when used in conjunction with... Figure 7 Temperature distribution calculated using the same parameters in the same case is as follows: Figure 11 The temperature difference is only about 23K. As can be seen from the comparison, the heat uniformity of the chamber can be achieved at a lower cost by using the measures of this utility model.

[0048] In summary, the compressed air energy storage power plant tunnel type artificial cavern temperature control structure can preferably meet the functional requirements of the temperature control equipment, including: (1) achieving uniform temperature distribution inside the cavern during inflation; (2) the equipment is simple enough, low cost, easy to construct, and easy to maintain in the later period; (3) as little as possible to occupy the cavern volume, reduce the power station energy storage capacity; (4) the equipment should not affect the cavern shape or other mechanical properties as much as possible, and facilitate cavern site selection. The structure used by the utility model uses only one or more levels of pipeline, and the pipeline shape is similar, which can save a lot of processing cost and reduce the construction difficulty of temperature control measures and cavern; There is no mechanical equipment in motion state on the pipeline, and the maintenance cost is lower; The pipeline itself can be bent, only needs to meet the connection conditions, weakens the engineering site selection restriction, and is easy to apply.

[0049] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; Obviously, the described examples are part of the embodiments of the utility model, not all. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model; In order to facilitate the description, only the part related to the utility model is shown in the drawings. In the case of no conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other; The technical solutions recorded in the foregoing examples are modified, or some technical features are replaced, without changing the essence of the corresponding technical solutions out of the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A temperature control structure for a tunnel-type artificial cavern of a compressed air energy storage power station, characterized in that, An air inlet pipe (2) is provided at one end of the tunnel-type artificial cavern (1). One or more temperature control pipes (3) are installed inside the tunnel-type artificial cavern (1). The temperature control pipe (3) extends from the air inlet pipe (2) to the other end near the tunnel-type artificial cavern (1). There is a gap or through hole between the air inlet pipe (2) and the temperature control pipe (3) to connect the inside and outside of the temperature control pipe (3).

2. The temperature control structure for the tunnel-type artificial cavern of the compressed air energy storage power station according to claim 1, characterized in that, The temperature control tube (3) is a multi-stage pipeline connected in sequence; between adjacent pipelines, the size of the outlet (4) of the upper-level pipeline located upstream in the inflation direction is smaller than the size of the inlet (5) of the lower-level pipeline located downstream in the inflation direction.

3. The temperature control structure for the tunnel-type artificial cavern of the compressed air energy storage power station according to claim 2, characterized in that, There is an interstage gap between the outlet (4) of the upper-level pipeline and the inlet (5) of the lower-level pipeline, and the interstage gap connects the inner and outer sides of the temperature control tube (3).

4. The temperature control structure for the tunnel-type artificial cavern of the compressed air energy storage power station according to claim 2, characterized in that, The outlet (4) of the upper-level pipeline contracts near the inlet (5) of the lower-level pipeline, and / or the inlet (5) of the lower-level pipeline expands near the outlet (4) of the upper-level pipeline.

5. The temperature control structure for the tunnel-type artificial cavern of the compressed air energy storage power station according to claim 2, characterized in that, In the direction from upstream to downstream of the inflation direction, the diameter of the multi-stage pipeline increases step by step.

6. The temperature control structure for a tunnel-type artificial cavern of a compressed air energy storage power station according to any one of claims 1-5, characterized in that, The size of the outlet of the gas inlet pipe (2) is smaller than the size of the inlet of the temperature control pipe (3).

7. The temperature control structure for the tunnel-type artificial cavern of the compressed air energy storage power station according to claim 6, characterized in that, The outlet of the inflation inlet pipe (2) contracts near the inlet of the temperature control pipe (3), and / or the outlet of the inflation inlet pipe (2) expands near the inlet of the temperature control pipe (3).

8. The temperature control structure for a tunnel-type artificial cavern of a compressed air energy storage power station according to any one of claims 1-5, characterized in that, The inner wall of the temperature control tube (3) is provided with raised or spiral flow channels.

9. The temperature control structure for a tunnel-type artificial cavern of a compressed air energy storage power station according to any one of claims 1-5, characterized in that, The temperature control pipe (3) is connected to the top of the tunnel-type artificial cave (1) via a hoisting structure (6) above, and / or the temperature control pipe (3) is connected to the bottom of the tunnel-type artificial cave (1) below via a support structure.

10. The temperature control structure for a tunnel-type artificial cavern of a compressed air energy storage power station according to any one of claims 1-5, characterized in that, The positions of the air inlet pipe (2) and the temperature control pipe (3) correspond to the middle of the cross-sectional shape of the tunnel-type artificial cave (1); the side of the temperature control pipe (3) and the end away from the air inlet pipe (2) form a space for air to flow, circulate and mix between them and the tunnel-type artificial cave (1).

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