A compressed air integrated energy supply system and method

Abstract

The present invention discloses a compressed air integrated energy supply system and method. The energy supply system includes a mine gas storage reservoir, cascade heat pipes, anchored heat pipes, a geothermal circulation well, a heating water inlet pipe, a heating water outlet pipe, a multi-stage compressor, a low-temperature heat storage tank, a multi-stage cooler, a high-temperature heat storage tank, a multi-stage turbine, a multi-stage regenerator, and a gas transmission pipeline. Several cascade heat pipes are arranged in the mine gas storage reservoir, and the bottoms of the cascade heat pipes extend deep into the dry hot rock layer of the stratum. A geothermal circulation well is arranged on the outer side of the upper layer of the mine gas storage reservoir. Several anchored heat pipes are arranged on the upper layer of the mine gas storage reservoir along the circumference of the mine gas storage reservoir. The outer ends of the anchored heat pipes extend toward the geothermal circulation well to transfer the heat energy inside the mine gas storage reservoir to the area where the geothermal circulation well is located. The present invention uses high-pressure air as the heat circulation medium and the stratum as the heat storage body, which can fully utilize the high-temperature heat energy of the deep stratum, further improving the overall energy efficiency of the system.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to a compressed air integrated energy supply system and method. Background Art

[0002] With the large-scale development and rapid penetration of renewable energy such as wind power and photovoltaics, their inherent volatility and uncertainty have brought serious challenges to the stable operation of the power grid.

[0003] Compressed air energy storage has the advantages of large capacity, long service life and low cost. It is one of the important technical means to achieve "peak shaving and valley filling" in the power grid and solve the volatility of renewable energy.

[0004] A Chinese invention patent application, publication number CN 114033490 A, discloses a mine gas storage-type compressed air energy storage system and its control method, relating to the field of energy storage technology. The system includes a multi-stage compressor, a multi-stage cooler, a multi-stage turbine, a multi-stage regenerator, a first heat storage tank, a second heat storage tank, and multiple horizontal mine tunnels distributed vertically along the stratum. Each end of the multiple horizontal mine tunnels is connected to a vertical shaft extending downward. A gas branch is provided between the gas pipeline in the shaft and the multiple horizontal mine tunnels, each of which is equipped with a valve. The multi-stage compressor, multi-stage cooler, multi-stage regenerator, and multi-stage turbine are sequentially connected, and the gas branch is connected to the pipeline between the multi-stage cooler and the multi-stage regenerator. The multi-stage regenerator, first heat storage tank, multi-stage cooler, and second heat storage tank are sequentially connected to form a circulation loop. While the technical solution disclosed in this application can utilize mine gas storage, the thermal energy utilization rate is low. Summary of the Invention

[0005] In view of the defects of the existing technology, the technical problem to be solved by the present invention is to provide a compressed air comprehensive energy supply system and method to improve the thermal energy utilization rate and further improve the comprehensive energy efficiency of the system.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A compressed air integrated energy supply system, comprising a mine gas storage, cascade heat pipes, anchored heat pipes, geothermal circulation wells, heating water inlet pipes, heating water outlet pipes, a multi-stage compressor, a low-temperature heat storage tank, a multi-stage cooler, a high-temperature heat storage tank, a multi-stage turbine, a multi-stage regenerator, and a gas transmission pipeline;

[0008] Several cascade heat pipes are installed in the mine gas storage reservoir. The top of each cascade heat pipe rises in a spiral along the circumference, and the bottom of each cascade heat pipe penetrates into the dry hot rock layer of the formation. The interior of each cascade heat pipe is filled with a working medium, and the boiling point of the medium decreases with increasing height. The cascade heating of the cascade heat pipe introduces heat energy from the dry hot rock layer to the bottom of the mine gas storage reservoir.

[0009] A geothermal circulation well is provided on the outer side of the upper layer of the mine gas storage reservoir. A plurality of anchored heat pipes are arranged on the upper layer of the mine gas storage reservoir along the circumference of the mine gas storage reservoir. The outer ends of the anchored heat pipes extend toward the geothermal circulation well to transfer heat energy inside the mine gas storage reservoir to the area where the geothermal circulation well is located.

[0010] The multi-stage compressor, the low-temperature heat storage tank, the high-temperature heat storage tank are connected to the multi-stage cooler, and the final stage cooler is connected to the gas pipeline. The multi-stage compressor compresses the air to a high-temperature and high-pressure state and sends it to the multi-stage cooler. The low-temperature heat transfer oil sent from the low-temperature heat storage tank enters the multi-stage cooler to recover the high-temperature heat energy in the high-pressure air. The high-temperature heat transfer oil sent from the multi-stage cooler returns to the high-temperature heat storage tank. The low-temperature air sent from the final stage cooler is sent along the gas pipeline into the mine gas storage reservoir and is heated by the heat released by the cascade heat pipes.

[0011] The multi-stage turbine is connected to a turbine air inlet pipe, which extends into the top of the mine gas storage reservoir. The multi-stage regenerator is connected to the turbine air inlet pipe and the high-temperature heat storage tank. The high-pressure air at the top of the mine gas storage reservoir is introduced into the multi-stage regenerator through the turbine air inlet pipe. The high-temperature heat transfer oil released from the high-temperature heat storage tank is sent to the multi-stage regenerator. The multi-stage regenerator heats the high-pressure air to a high-temperature and high-pressure state, and then sends it to the multi-stage turbine for expansion and power generation. The low-temperature heat transfer oil output by the multi-stage regenerator returns to the low-temperature heat storage tank.

[0012] The heating water inlet pipe sends the cooling water into the geothermal circulation well for heating, and the heated hot water is output through the heating water outlet pipe to the external load for heating.

[0013] Preferably, the anchored heat pipe is provided with fins on the inner side of the mine gas storage reservoir.

[0014] Preferably, a plurality of anchored heat pipes are arranged in layers along the height direction of the mine gas storage reservoir, and two adjacent layers of anchored heat pipes are staggered in the circumferential direction of the mine gas storage reservoir.

[0015] Preferably, the depth of the anchored heat pipe arrangement is consistent with the depth of the geothermal circulation well.

[0016] Preferably, the cascade heat pipe is formed by connecting a number of branch heat pipes with gradually increasing diameters end to end.

[0017] Preferably, two adjacent branch heat pipes are connected by threads, and the top of the lower branch heat pipe extends into the bottom of the upper branch heat pipe.

[0018] Preferably, the threaded connection parts of two adjacent branch heat pipes are provided with thermal conductive silica gel.

[0019] The present invention also provides a method for providing a comprehensive compressed air energy supply, which uses a comprehensive compressed air energy supply system to provide energy.

[0020] During energy storage, the multi-stage compressor compresses the air to a high-temperature and high-pressure state and sends it to the multi-stage cooler. The low-temperature thermal oil sent from the low-temperature heat storage tank enters the multi-stage cooler to recover the high-temperature heat energy in the high-pressure air. The high-temperature thermal oil sent from the multi-stage cooler returns to the high-temperature heat storage tank. The low-temperature air sent from the final cooler is sent to the bottom of the mine gas storage along the gas pipeline.

[0021] The heat energy of the hot dry rock deep in the stratum is introduced into the mine gas storage through the cascade heating of the cascade heat pipes. The low-temperature air at the bottom of the mine gas storage is heated in sequence by the cascade heat pipes and its density decreases. The air with reduced density begins to circulate upward along the mine gas storage. The high-temperature air gathered at the top of the mine gas storage heats the anchor heat pipe. The density of the cooled air increases. As the air density increases, it descends to the bottom of the mine gas storage and is then heated by the cascade heat pipes at the bottom to start the next cycle. The working medium inside the anchor heat pipe evaporates after being heated and condenses along the evaporation chamber to the outer end of the heat pipe, releasing heat energy. The condensed liquid working medium flows back along the liquid absorption core inside the heat pipe to the inner end of the anchor heat pipe to start the next cycle.

[0022] High-pressure, low-temperature air circulates inside the mine gas storage, bringing the heat energy brought into the mine gas storage by the cascade heat pipes at the bottom to the top of the mine gas storage, and then stores it in the top stratum through anchored heat pipes to heat the geothermal circulation well;

[0023] During power release, high-pressure air from the top of the mine gas storage is introduced into the multi-stage regenerator through the turbine inlet pipe. The high-temperature heat transfer oil released from the high-temperature heat storage tank is sent to the multi-stage regenerator. The multi-stage regenerator heats the high-pressure air to a high-temperature and high-pressure state and then sends it to the multi-stage turbine for expansion and power generation. The low-temperature heat transfer oil output by the multi-stage regenerator returns to the low-temperature heat storage tank.

[0024] When releasing heat, the heating water inlet pipe sends the cooling water into the geothermal circulation well for heating, and the heated hot water is output from the heating water outlet pipe to the external load for heating.

[0025] The present invention adopts the above technical solution to achieve the following beneficial technical effects:

[0026] High-pressure air is used as the heat circulation medium, the stratum is used as the heat storage body, and the heat energy of the dry hot rock stratum is introduced into the mine gas storage through cascade heat pipes, which can fully utilize the high-temperature heat energy of the deep stratum.

[0027] High-pressure, low-temperature air circulates within the mine gas storage reservoir, continuously bringing heat energy, brought in by cascaded heat pipes at the bottom, to the top of the reservoir. This heat energy is then stored in the strata above via anchored heat pipes, where it is used to heat the geothermal circulation well. During heat release, the heating inlet pipe delivers cooling water to the geothermal circulation well for heating. The heated water is then output through the heating outlet pipe to heat external loads. The circulating heat transfer of high-pressure air within the mine gas storage reservoir effectively ensures the heat supply and heating temperature of the upper strata, fully utilizing deep geothermal heat and improving the system's heating capacity. This, in turn, enhances the system's overall energy efficiency.

[0028] The specific technical solutions adopted by the present invention and the beneficial effects thereof will be disclosed in detail in the following specific embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0030] Figure 1 This is a structural schematic diagram of a compressed air integrated energy supply system of the present invention;

[0031] Figure 2 A top view of a compressed air integrated energy supply system according to the present invention;

[0032] Figure 3 Schematic diagram of the structure of the cascade heat pipe in an embodiment of the present invention;

[0033] In the figure, 1-compressor 1; 2-compressor 2; 3-cooler 1; 4-cooler 2; 5-valve 1; 6-valve 2; 7-turbine 1; 8-turbine 2; 9-regenerator 1; 10-regenerator 2; 11-high-temperature heat storage tank; 12-low-temperature heat storage tank; 13-mine gas storage; 14-anchored heat pipe; 15-geothermal circulation well; 16-cascade heat pipe; 17-gas transmission pipeline; 18-turbine air inlet pipeline; 19-heating water inlet pipeline; 20-heating water outlet pipeline. DETAILED DESCRIPTION

[0034] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention. However, the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0035] Those skilled in the art will appreciate that, unless there is any conflict, the features in the following embodiments and implementations may be combined with each other.

[0036] like Figures 1 to 3The compressed air integrated energy supply system shown includes a mine gas storage reservoir 13, cascade heat pipes 16, anchored heat pipes 14, geothermal circulation wells 15, heating water inlet pipes 19, heating water outlet pipes 20, multi-stage compressors, low-temperature heat storage tanks 12, multi-stage coolers, high-temperature heat storage tanks 11, multi-stage turbines, multi-stage regenerators, and gas transmission pipelines 17.

[0037] In this embodiment, the multi-stage compressor includes compressor 1 and compressor 2, the multi-stage cooler includes cooler 1 3 and cooler 2 4, the multi-stage turbine includes turbine 1 7 and turbine 2 8, and the multi-stage regenerator includes regenerator 1 9 and regenerator 2 10. It is understood that the number of stages in the above multi-stage structure can be further increased.

[0038] The final cooler is connected to the gas pipeline 17, which goes deep into the bottom of the mine gas storage reservoir 13. The low-temperature air sent from the final cooler is sent into the mine gas storage reservoir along the gas pipeline.

[0039] The multi-stage turbine is connected to the turbine air inlet pipe 18 and the multi-stage heat regenerator, wherein the turbine air inlet pipe 18 is located at the top of the mine gas storage reservoir 13 and is connected to the multi-stage heat regenerator, and the multi-stage heat regenerator is connected to the multi-stage turbine.

[0040] Several anchored heat pipes 14 are arranged along the circumference of the mine gas storage reservoir 13 above the reservoir. These pipes are positioned at a depth consistent with the depth of the geothermal circulation well 15. These anchored heat pipes can be arranged horizontally, with their inner ends located within the reservoir and their outer ends extending toward the geothermal circulation well. This arrangement transfers heat energy from within the reservoir to the geothermal circulation well.

[0041] Furthermore, a plurality of anchored heat pipes are arranged in layers along the height direction of the mine gas storage reservoir. The arrangement angle of each layer of anchored heat pipes is staggered with the arrangement angle of the adjacent layers of anchored heat pipes in the circumferential direction of the mine gas storage reservoir, that is, a staggered arrangement is formed in the circumferential direction.

[0042] The anchored heat pipe 14 is located on the inner side of the mine gas storage reservoir 13 and is provided with fins. The anchored heat pipe 14 can fix the upper mine structure and transfer the heat energy inside the mine to the area where the geothermal circulation well 15 is located.

[0043] The geothermal circulation well 15 is arranged outside the upper layer of the mine gas storage reservoir 13 . Several geothermal circulation wells 15 can be distributed at intervals along the circumference of the mine gas storage reservoir and located in the area between two adjacent anchored heat pipes 14 .

[0044] Heating pipes are arranged inside the geothermal circulation wells, connecting to the heating water inlet pipe 19 and the heating water outlet pipe 20. The outer heating water inlet pipes of all geothermal circulation wells 15 are interconnected in a circular manner, with water entering through a unified water inlet; the inner heating water outlet pipes of all geothermal circulation wells 15 are interconnected in a circular manner, with water exiting through a unified water outlet.

[0045] Several cascade heat pipes 16 are also arranged circumferentially within the mine gas storage reservoir 13. The bottoms of these cascade heat pipes extend deep into the dry, hot rock formations, while the tops of these pipes rise in a spiral pattern along the circumference. The heights of these cascade heat pipes 16 can vary, with the tallest reaching the top of the geothermal circulation well 15. In this embodiment, some cascade heat pipes 16 are lower than the bottom of the geothermal circulation well 15, while others have their highest points roughly at the top of the geothermal circulation well 15.

[0046] The cascade heat pipe 16 is formed by connecting a number of branch heat pipes with increasing diameters end to end. Two adjacent branch heat pipes are connected by threads, and the top of the lower branch heat pipe extends into the bottom of the upper branch heat pipe and is wrapped by the bottom of the upper branch heat pipe.

[0047] Furthermore, the threaded connection between two adjacent branch heat pipes is provided with thermally conductive silicone to fully ensure good thermal contact inside the heat pipes. This connection can fully expand the contact area between the heat pipes and effectively ensure longitudinal heat transfer.

[0048] In addition, the boiling point of the working medium filled in each branch heat pipe inside the cascade heat pipe 16 decreases as the height of the heat pipe increases.

[0049] Several valves are also provided, among which valve 1 5 is provided at the connection end between the gas pipeline 17 and the cooler, and valve 2 6 is provided at the connection end between the turbine air inlet pipeline 18 and the regenerator. The valves can be existing ball valves, solenoid valves, etc.

[0050] The compressed air integrated energy supply method adopts the above-mentioned compressed air integrated energy supply system for energy supply, and the working principle is as follows:

[0051] When storing energy, a multi-stage compressor is used to compress the air to a high-temperature and high-pressure state. At this time, the low-temperature heat transfer oil output from the outlet of the low-temperature heat storage tank 12 enters the multi-stage cooler to recover the high-temperature heat energy in the high-pressure air; the high-temperature heat transfer oil output from the cooler outlet returns to the high-temperature heat storage tank 11, and the low-temperature air from the outlet of the final stage cooler is sent to the bottom of the mine gas storage reservoir 13 along the gas pipeline 17.

[0052] The bottom of the cascade heat pipes extends deep into the dry hot rock layer of the formation. The dry hot rock can reach temperatures of up to 300°C. This dry hot rock heats the lower heat pipes in the cascade. The working medium at the bottom of the bottom heat pipe evaporates upon heating. The evaporated working medium then flows through the heat pipe's steam chamber to the top of the bottom heat pipe, where it condenses and releases heat. The condensed working medium then flows back along the heat pipe's wall to the bottom, starting the next cycle. The heat released by the bottom heat pipe in turn heats the bottom of the adjacent upper heat pipe. In this way, through cascade heating of multiple heat pipes, the heat energy from the dry hot rock deep in the formation can be transferred to the mine gas storage.

[0053] The low-temperature air input to the bottom of the mine gas storage reservoir 13 through the gas pipeline 17 is heated in sequence by the cascade heat pipes 16 and its density decreases. The air with decreased density begins to circulate upward along the mine gas storage reservoir 13. The high-temperature air gathered at the top of the mine gas storage reservoir 13 will heat the anchor heat pipe 14. The density of the cooled air increases. As the air density increases, it will descend to the bottom along the mine gas storage reservoir 13, and then will be heated by the cascade heat pipes 16 at the bottom to start the next cycle.

[0054] The working medium inside the anchored heat pipe 14 evaporates after being heated, and condenses along the evaporation chamber to the outer end of the heat pipe and releases heat energy; the condensed liquid working medium flows back along the liquid absorption core inside the heat pipe to the inner end of the anchored heat pipe 14 to start the next cycle.

[0055] In this way, high-pressure, low-temperature air is sent to the bottom of the mine gas storage 13 through the compression side, and the high-pressure, low-temperature air circulates inside the mine 13, and the heat energy at the bottom brought into the mine gas storage 13 by the cascade heat pipes 16 is continuously brought to the top of the mine gas storage 13, and stored in the top stratum through the anchored heat pipes 14.

[0056] During power generation, high-pressure air at the top is introduced into the multi-stage regenerator through the turbine inlet pipe 18. During this process, the high-temperature thermal oil within the high-temperature heat storage tank 11 is released, heating the high-pressure air to a high temperature and pressure before entering the multi-stage turbine for expansion and power generation. The low-temperature thermal oil at the regenerator outlet returns to the low-temperature heat storage tank 12. Because the high-pressure air at the top of the mine gas storage reservoir 13 is hotter than the air at the bottom, meaning the air entering the gas pipeline 17 is cooler than the air exiting the turbine inlet pipe 18, the heat regenerator system effectively reduces heat recovery, improving the system's power generation capacity and reducing investment costs.

[0057] During heat release, cooling water entering through the heating water inlet pipe 19 is heated by the geothermal circulation well 15 and then output through the heating water outlet pipe 20 to heat external loads. The circulating heat transfer of high-pressure air within the mine gas storage reservoir 13 effectively ensures the heating capacity and temperature of the upper strata, fully utilizing the deep geothermal heat and improving the system's heating capacity.

[0058] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art will understand that the present invention includes, but is not limited to, the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present invention are intended to be included within the scope of the claims.

Claims

1. A compressed air integrated energy supply system, characterized in that: Including mine gas storage, cascade heat pipes, anchored heat pipes, geothermal circulation wells, heating water inlet pipes, heating water outlet pipes, multi-stage compressors, low-temperature heat storage tanks, multi-stage coolers, high-temperature heat storage tanks, multi-stage turbines, multi-stage regenerators and gas pipelines; Several cascade heat pipes are installed in the mine gas storage. The top of each cascade heat pipe rises in a spiral along the circumference, and the bottom of each cascade heat pipe penetrates into the dry hot rock layer of the formation. The interior of each cascade heat pipe is filled with a working medium, and the boiling point of the medium decreases with increasing height. The heat energy of the dry hot rock layer is introduced into the mine gas storage through cascade heating by the cascade heat pipes. A geothermal circulation well is provided on the outer side of the upper layer of the mine gas storage reservoir. A plurality of anchored heat pipes are arranged on the upper layer of the mine gas storage reservoir along the circumference of the mine gas storage reservoir. The anchored heat pipes are arranged horizontally with their inner ends located inside the mine gas storage reservoir and their outer ends extending toward the geothermal circulation well to transfer heat energy inside the mine gas storage reservoir to the area where the geothermal circulation well is located. The multi-stage compressor, the low-temperature heat storage tank, the high-temperature heat storage tank are connected to the multi-stage cooler, and the final stage cooler is connected to the gas pipeline. The multi-stage compressor compresses the air to a high-temperature and high-pressure state and sends it to the multi-stage cooler. The low-temperature heat transfer oil sent from the low-temperature heat storage tank enters the multi-stage cooler to recover the high-temperature heat energy in the high-pressure air. The high-temperature heat transfer oil sent from the multi-stage cooler returns to the high-temperature heat storage tank. The low-temperature air sent from the final stage cooler is sent to the bottom of the mine gas storage along the gas pipeline and is heated by the heat released by the cascade heat pipes. The multi-stage turbine is connected to a turbine air inlet pipe, which extends into the top of the mine gas storage reservoir. The multi-stage regenerator is connected to the turbine air inlet pipe and the high-temperature heat storage tank. The high-pressure air at the top of the mine gas storage reservoir is introduced into the multi-stage regenerator through the turbine air inlet pipe. The high-temperature heat transfer oil released from the high-temperature heat storage tank is sent to the multi-stage regenerator. The multi-stage regenerator heats the high-pressure air to a high-temperature and high-pressure state, and then sends it to the multi-stage turbine for expansion and power generation. The low-temperature heat transfer oil output by the multi-stage regenerator returns to the low-temperature heat storage tank. The heating water inlet pipe sends the cooling water into the geothermal circulation well for heating, and the heated hot water is output through the heating water outlet pipe to the external load for heating.

2. A compressed air integrated energy supply system according to claim 1, characterized in that: The anchored heat pipe is located inside the mine gas storage reservoir and is provided with fins.

3. A compressed air integrated energy supply system according to claim 1, characterized in that: A plurality of anchored heat pipes are arranged in layers along the height direction of the mine gas storage reservoir, and two adjacent layers of anchored heat pipes are staggered in the circumferential direction of the mine gas storage reservoir.

4. A compressed air integrated energy supply system according to claim 1, characterized in that: The depth of the anchored heat pipe arrangement is consistent with the depth of the geothermal circulation well.

5. The compressed air integrated energy supply system according to claim 1, characterized in that: The cascade heat pipe is formed by connecting a plurality of branch heat pipes with gradually increasing diameters end to end.

6. A compressed air integrated energy supply system according to claim 5, characterized in that: Two adjacent branch heat pipes are connected by threads, and the top of the lower branch heat pipe extends into the bottom of the upper branch heat pipe.

7. A compressed air integrated energy supply system according to claim 6, characterized in that: The threaded connection parts of two adjacent branch heat pipes are provided with thermal conductive silica gel.

8. A method for integrated compressed air energy supply, comprising: During energy storage, the multi-stage compressor compresses the air to a high-temperature and high-pressure state and sends it to the multi-stage cooler. The low-temperature thermal oil sent from the low-temperature heat storage tank enters the multi-stage cooler to recover the high-temperature heat energy in the high-pressure air. The high-temperature thermal oil sent from the multi-stage cooler returns to the high-temperature heat storage tank. The low-temperature air sent from the final cooler is sent to the bottom of the mine gas storage along the gas pipeline. The heat energy of the hot dry rock deep in the stratum is introduced into the mine gas storage through the cascade heating of the cascade heat pipes. The low-temperature air at the bottom of the mine gas storage is heated in sequence by the cascade heat pipes and its density decreases. The air with reduced density begins to circulate upward along the mine gas storage. The high-temperature air gathered at the top of the mine gas storage heats the anchor heat pipe. The density of the cooled air increases. As the air density increases, it descends to the bottom of the mine gas storage and is then heated by the cascade heat pipes at the bottom to start the next cycle. The working medium inside the anchor heat pipe evaporates after being heated and condenses along the evaporation chamber to the outer end of the heat pipe, releasing heat energy. The condensed liquid working medium flows back along the liquid absorption core inside the heat pipe to the inner end of the anchor heat pipe to start the next cycle. High-pressure, low-temperature air circulates inside the mine gas storage, bringing the heat energy brought into the mine gas storage by the cascade heat pipes at the bottom to the top of the mine gas storage, and then stores it in the top stratum through anchored heat pipes to heat the geothermal circulation well; During power release, high-pressure air from the top of the mine gas storage is introduced into the multi-stage regenerator through the turbine inlet pipe. The high-temperature heat transfer oil released from the high-temperature heat storage tank is sent to the multi-stage regenerator. The multi-stage regenerator heats the high-pressure air to a high-temperature and high-pressure state and then sends it to the multi-stage turbine for expansion and power generation. The low-temperature heat transfer oil output by the multi-stage regenerator returns to the low-temperature heat storage tank. When releasing heat, the heating water inlet pipe sends the cooling water into the geothermal circulation well for heating, and the heated hot water is output from the heating water outlet pipe to the external load for heating.

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