Compressed air energy storage underground chamber waste heat and waste cold utilization system

Abstract

The invention discloses a compressed air energy storage underground chamber waste heat and waste cold utilization system which comprises a chamber structure, an inflation and deflation mechanism, a heat exchange mechanism and an energy recycling mechanism, a closed air storage cavity is formed in the chamber structure, and an air inlet and outlet communicated with the air storage cavity is formed in the chamber structure; the inflating and deflating mechanism comprises an air pipe; the heat exchange mechanism comprises a liquid storage tank and a heat exchange assembly, and heat conduction liquid is contained in the liquid storage tank. The device has the beneficial effects that through the uniform air distribution design of the air pipes, the uniformity of the inflation and deflation process is ensured, and the risk of concrete lining cracking caused by local temperature difference is reduced. Through cooperative work of the heat exchange mechanism and the energy recycling mechanism, waste heat generated in the inflation process and waste cold generated in the deflation process are effectively recycled and utilized, so that on one hand, energy waste is reduced, the overall energy efficiency of the system is improved, and on the other hand, the energy storage potential of the chamber can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressed air energy storage, and in particular to a system for utilizing waste heat and waste cold in a compressed air energy storage underground chamber. Background Art

[0002] Compressed air energy storage technology, as an efficient way of energy storage, has been widely used in underground chamber environments in recent years. This technology stores energy by compressing air in underground chambers and releases compressed air to drive generators to generate electricity when needed. However, in actual operation, the compressed air energy storage system in underground chambers faces several key technical challenges.

[0003] First, during the inflation process of the underground chamber, the temperature inside the chamber will rise rapidly due to the heat generated by the gas compression. The increase in temperature leads to the intensification of the thermal motion of the gas molecules, which in turn reduces the amount of gas that can be filled into the chamber, that is, reduces the actual inflation volume. Correspondingly, during the deflation process, as the gas temperature drops rapidly, the movement of gas molecules slows down. When the internal and external pressures are balanced, the amount of gas remaining inside the chamber increases, thereby reducing the deflation volume. This temperature change during the inflation and deflation process actually reduces the energy storage efficiency of the system and affects its overall performance.

[0004] Secondly, the rapid rise and fall of temperature not only has a negative impact on energy storage efficiency, but may also cause the concrete lining of the underground chamber to expand and contract periodically. This cyclical stress change increases the risk of cracking of the concrete lining and poses a potential threat to the structural stability and safety of the chamber.

[0005] In addition, there are two significant problems in the prior art. One is that it is impossible to effectively recover and utilize the waste heat generated by the temperature increase during the inflation process and the waste cold generated by the temperature decrease during the deflation process. These unused energies not only cause energy waste, but also increase the heat load and cold load of the system, further affecting the overall energy efficiency of the system. Second, the temperature distribution inside the chamber is uneven during the inflation and deflation process, and it is easy for the local temperature to be too high, which has an adverse effect on the structural stability of the chamber. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose a compressed air energy storage underground chamber waste heat and waste cold utilization system to solve the problems of low energy storage efficiency, poor structural stability and energy waste existing in the prior art.

[0007] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0008] The present invention provides a system for utilizing waste heat and waste cold in a compressed air energy storage underground chamber, comprising:

[0009] A chamber structure, wherein the chamber structure has a closed air storage cavity, and the chamber structure is provided with an air inlet and an air outlet connected to the air storage cavity;

[0010] An air charging and discharging mechanism, the air charging and discharging mechanism comprising an air pipe, one end of the air pipe extending into the air storage cavity after passing through the air outlet, the air pipe extending along the central axis of the air storage cavity, and a plurality of air ports being evenly opened on the side wall of the air pipe along the length direction;

[0011] A heat exchange mechanism, the heat exchange mechanism comprising a liquid storage tank and a heat exchange component, the liquid storage tank contains a heat transfer liquid, and the heat exchange component is used to achieve heat exchange between the heat transfer liquid in the liquid storage tank and the gas in the gas storage chamber; and

[0012] An energy recycling mechanism is used to realize energy exchange between the heat transfer liquid in the liquid storage tank and the external heating side or cooling side.

[0013] In some embodiments, the chamber structure includes a concrete lining and two blocking blocks. The concrete lining is a cylinder with openings at both ends. The two blocking blocks are respectively fixed at both ends of the concrete lining to seal the openings at both ends of the concrete lining. The air inlet and outlet are opened in the center of one of the blocking blocks.

[0014] In some embodiments, the chamber structure further includes a sealing layer, which is applied to the inner wall of the concrete lining.

[0015] In some embodiments, the heat exchange component includes an internal heat exchanger, a first external heat exchange tube, a compressor, a four-way valve and a capillary tube. The internal heat exchanger is arranged in the air storage cavity, the first external heat exchange tube is immersed in the heat transfer fluid in the liquid storage tank, the first interface of the four-way valve is connected to the outlet of the compressor, the second interface of the four-way valve is connected to one end of the internal heat exchanger, the third interface of the four-way valve is connected to the inlet of the compressor, the fourth interface of the four-way valve is connected to one end of the first external heat exchange tube, and the four-way valve can be switched to a first state or a second state. When the four-way valve is in the first state, the first interface is connected to the fourth interface, and the second interface is connected to the third interface. When the four-way valve is in the second state, the first interface is connected to the second interface, and the third interface is connected to the fourth interface. One end of the capillary tube is connected to the other end of the internal heat exchanger, and the other end of the capillary tube is connected to the other end of the first external heat exchange tube.

[0016] In some embodiments, one of the blocking blocks is further provided with two heat exchange holes connected to the air storage cavity, and the internal heat exchanger comprises an internal heat exchange tube, a first insert tube and a second insert tube, the internal heat exchange tube is built into the air storage cavity and arranged around the air pipe, the first insert tube and the second insert tube are fixedly inserted in the two heat exchange holes respectively, one end of the first insert tube is connected to the second interface, the other end of the first insert tube is connected to one end of the internal heat exchange tube, the other end of the internal heat exchange tube is connected to one end of the second insert tube, and the other end of the second insert tube is connected to one end of the capillary tube.

[0017] In some embodiments, a plurality of fins are evenly formed on the outer wall of the inner heat exchange tube, and the fins are located outside the corresponding air ports.

[0018] In some embodiments, a first temperature sensor is also disposed in the liquid storage tank.

[0019] In some embodiments, the energy recycling mechanism includes a second external heat exchange tube, a circulation pump, a first liquid inlet valve, a first liquid outlet valve, a second liquid inlet valve, a second liquid outlet valve and a reflux pipe, the second external heat exchange tube is immersed in the heat transfer liquid in the liquid storage tank, the inlet of the circulation pump is connected to one end of the second external heat exchange tube, one end of the first liquid inlet valve is connected to the outlet of the circulation pump, the other end of the first liquid inlet valve is connected to one end of the heating side, the other end of the heating side is connected to one end of the first liquid outlet valve, the other end of the first liquid outlet valve is connected to one end of the reflux pipe, one end of the second liquid inlet valve is connected to the outlet of the circulation pump, the other end of the second liquid inlet valve is connected to one end of the cooling side, the other end of the cooling side is connected to one end of the second liquid outlet valve, the other end of the second liquid outlet valve is connected to one end of the reflux pipe, and the other end of the reflux pipe is connected to the other end of the second external heat exchange tube.

[0020] In some embodiments, the energy recovery mechanism also includes a liquid extraction pipe and a second temperature sensor, one end of the liquid extraction pipe is connected to one end of the second external heat exchange tube, and the other end of the liquid extraction pipe is connected to the inlet of the circulation pump, and the second temperature sensor is used to detect the temperature of the liquid in the liquid extraction pipe.

[0021] In some embodiments, a circulation outlet is provided at one end of the liquid storage tank, and a circulation inlet is provided at the other end of the liquid storage tank. The heat exchange mechanism also includes a flow component, and the flow component includes a driving pump. The inlet of the driving pump is connected to the circulation outlet, and the outlet of the driving pump is connected to the circulation inlet.

[0022] Compared with the prior art, the beneficial effects of the compressed air energy storage underground chamber waste heat and waste cold utilization system provided by the present invention are: through the uniform air distribution design of the air pipe, the uniformity of the inflation and deflation process is ensured, the risk of concrete lining cracking caused by local temperature difference is reduced, and the structural stability of the underground chamber is improved. The coordinated work of the heat exchange mechanism and the energy recovery mechanism enables the waste heat generated during the inflation process and the waste cold generated during the deflation process to be effectively recovered and utilized. On the one hand, this reduces energy waste and improves the overall energy efficiency of the system. On the other hand, by recovering and utilizing the waste heat, the gas temperature can be moderately reduced during the inflation process, thereby increasing the inflation volume; correspondingly, during the deflation process, the recovery and utilization of waste cold helps to increase the gas temperature, thereby increasing the deflation volume. The energy storage potential of the chamber is enhanced, and by finely controlling the temperature of the gas in the gas storage cavity, the present invention can also reduce the temperature difference variation amplitude to which the concrete lining is subjected, which further consolidates its structural stability and prolongs its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a system for utilizing waste heat and waste cooling in an underground chamber of compressed air energy storage provided by one embodiment of the present invention;

[0024] Figure 2 yes Figure 1 A schematic diagram of the structure of the chamber in FIG.

[0025] Figure 3 yes Figure 1 A schematic diagram of the structure of the heat exchange mechanism;

[0026] Description of the reference numerals: 1-chamber structure, 11-concrete lining, 12-blocking block, 121-air inlet and outlet, 122-heat exchange hole, 13-sealing layer, 2-gas charging and discharging mechanism, 21-air pipe, 211-air port, 3-heat exchange mechanism, 31-liquid storage tank, 311-first temperature sensor, 312-circulation outlet, 313-circulation inlet, 32-heat exchange component, 321-internal heat exchanger, 3211-internal heat exchange pipe, 32111-fin, 3212-first plug Tube, 3213-second insert tube, 322-first external heat exchange tube, 323-compressor, 324-four-way valve, 325-capillary tube, 33-flow component, 331-drive pump, 4-energy recovery mechanism, 41-second external heat exchange tube, 42-circulation pump, 43-first liquid inlet valve, 44-first liquid outlet valve, 45-second liquid inlet valve, 46-second liquid outlet valve, 47-reflux pipe, 48-liquid extraction pipe, 49-second temperature sensor, 5-heating side, 6-cooling side. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] In order to solve the existing problems of low energy storage efficiency, poor structural stability and energy waste, the present invention provides a compressed air energy storage underground chamber waste heat and waste cold utilization system, which can realize the effective recovery and utilization of waste heat and waste cold generated in the compressed air energy storage process, thereby improving the overall energy efficiency of the system, reducing operating costs, and ensuring the structural safety of the underground chamber.

[0029] See also Figure 1-Figure 3 , Figure 1 This is a structural schematic diagram of a system for utilizing waste heat and waste cold in an underground chamber with compressed air energy storage in one embodiment of the present invention. The system for utilizing waste heat and waste cold in an underground chamber with compressed air energy storage includes a chamber structure 1, an air charging and discharging mechanism 2, a heat exchange mechanism 3 and an energy recovery mechanism 4.

[0030] The chamber structure 1 has a sealed air storage cavity inside, and the chamber structure 1 is provided with air inlet and outlet ports 121 communicating with the air storage cavity.

[0031] The inflation and deflation mechanism 2 includes an air pipe 21, one end of which passes through the air outlet and extends into the air storage cavity. The air pipe 21 extends along the central axis of the air storage cavity, and a plurality of air ports 211 are evenly opened on the side wall of the air pipe 21 along the length direction.

[0032] The heat exchange mechanism 3 includes a liquid storage tank 31 and a heat exchange component 32. The liquid storage tank 31 contains heat transfer liquid. The heat exchange component 32 is used to achieve heat exchange between the heat transfer liquid in the liquid storage tank 31 and the gas in the gas storage cavity.

[0033] The energy recycling mechanism 4 is used to realize energy exchange between the heat transfer liquid in the liquid storage tank 31 and the external heating side 5 or cooling side 6 .

[0034] When the system is in an inflated state, external air enters the air storage chamber in the chamber structure 1 through the air pipe 21 of the inflation and deflation mechanism 2. Since the air pipe 21 extends along the central axis of the air storage chamber, and a number of air ports 211 are evenly opened on its side wall, the compressed air can be evenly distributed to all corners of the air storage chamber. As the compressed air enters, the temperature in the air storage chamber rises rapidly. At this time, the heat exchange mechanism 3 starts to work, and the high-temperature gas in the air storage chamber is heat-exchanged with the heat-conducting liquid in the liquid storage tank 31 through the heat exchange component 32, so that the temperature of the heat-conducting liquid is increased. The heat of the high-temperature heat-conducting liquid is then absorbed by the energy recovery mechanism 4 and transferred to the external heating side 5 for heating or other heat energy utilization scenarios.

[0035] When the system needs to release energy, the compressed air in the air storage chamber is discharged through the air pipe 21. Similarly, due to the design of the air pipe 21, the deflation process is also uniform. As the gas is released, the temperature in the air storage chamber drops rapidly. At this time, the heat exchange mechanism 3 is started again, and the heat exchange component 32 is used to exchange heat between the low-temperature gas in the air storage chamber and the heat transfer liquid in the liquid storage tank 31, so that the temperature of the heat transfer liquid is reduced. After the low-temperature heat transfer liquid is captured by the energy recovery mechanism 4, it is transferred to the external cooling side 6 for refrigeration or other cold energy utilization scenarios.

[0036] The technical solution provided by the present invention ensures the uniformity of the inflation and deflation process through the uniform gas distribution design of the air pipe 21, reduces the risk of concrete lining cracking caused by local temperature differences, and improves the structural stability of the underground chamber. The coordinated work of the heat exchange mechanism 3 and the energy recovery mechanism 4 enables the waste heat generated during the inflation process and the waste cold generated during the deflation process to be effectively recovered and utilized. This, on the one hand, reduces energy waste and improves the overall energy efficiency of the system. On the other hand, by recovering and utilizing the waste heat, the gas temperature can be moderately reduced during the inflation process, thereby increasing the inflation volume; correspondingly, during the deflation process, the recovery and utilization of the waste cold helps to increase the gas temperature, thereby increasing the deflation volume. The energy storage potential of the chamber is enhanced, and by finely controlling the temperature of the gas in the gas storage cavity, the present invention can also reduce the temperature difference variation amplitude to which the concrete lining is subjected, which further consolidates its structural stability and prolongs its service life.

[0037] In one embodiment, see Figure 1 and Figure 2 The chamber structure 1 includes a concrete lining 11 and two blocking blocks 12. The concrete lining 11 is a cylindrical shape with openings at both ends. The two blocking blocks 12 are respectively fixed at both ends of the concrete lining 11 to block the openings at both ends of the concrete lining 11. The air inlet and outlet 121 is opened at the center of one of the blocking blocks 12.

[0038] In one embodiment, see Figure 1 and Figure 2 The chamber structure 1 also includes a sealing layer 13, which is applied on the inner wall of the concrete lining 11.

[0039] In one embodiment, see Figure 1-Figure 3The heat exchange component 32 includes an internal heat exchanger 321, a first external heat exchange tube 322, a compressor 323, a four-way valve 324 and a capillary tube 325. The internal heat exchanger 321 is arranged in the gas storage cavity. The first external heat exchange tube 322 is immersed in the heat transfer liquid in the liquid storage tank 31. The first external heat exchange tube 322 contains refrigerant. The first interface of the four-way valve 324 is connected to the outlet of the compressor 323, the second interface of the four-way valve 324 is connected to one end of the internal heat exchanger 321, the third interface of the four-way valve 324 is connected to the inlet of the compressor 323, and the four-way valve The fourth interface of 324 is connected to one end of the first external heat exchange tube 322, and the four-way valve 324 can be switched to a first state or a second state. When the four-way valve 324 is in the first state, the first interface is connected to the fourth interface, and the second interface is connected to the third interface. When the four-way valve 324 is in the second state, the first interface is connected to the second interface, and the third interface is connected to the fourth interface. One end of the capillary tube 325 is connected to the other end of the internal heat exchanger 321, and the other end of the capillary tube 325 is connected to the other end of the first external heat exchange tube 322.

[0040] In this embodiment, during the charging stage, the four-way valve 324 switches to the first state, the outlet of the compressor 323 is connected to one end of the first external heat exchange tube 322, and one end of the internal heat exchanger 321 is connected to the inlet of the compressor 323. In this stage, the compressor 323 compresses the refrigerant into a high-temperature and high-pressure gas, and sends it to the first external heat exchange tube 322 through the four-way valve 324. Since the first external heat exchange tube 322 is immersed in the heat transfer liquid in the liquid storage tank 31, the high-temperature and high-pressure refrigerant gas will release heat in the tube and transfer the heat to the heat transfer liquid. The temperature of the heat transfer liquid rises, and the refrigerant is converted into a low-temperature refrigerant gas. The low-temperature refrigerant gas enters the capillary 325 and then enters the internal heat exchanger 321. The low-temperature refrigerant gas is converted into a low-temperature refrigerant liquid. The low-temperature refrigerant liquid absorbs the heat of the gas in the gas storage cavity and is converted into a refrigerant gas, so that the temperature of the gas in the gas storage cavity is reduced, and the refrigerant gas flows back to the inlet of the compressor 323 to be compressed again.

[0041] In the deflation stage, when the four-way valve 324 switches to the second state, the outlet of the compressor 323 is connected to one end of the internal heat exchanger 321, and one end of the first external heat exchange tube 322 is connected to the inlet of the compressor 323. In this stage, the compressor 323 also compresses the refrigerant into a high-temperature and high-pressure gas, but this time the gas is sent to the internal heat exchanger 321. Since the internal heat exchanger 321 is arranged in the gas storage cavity, the high-temperature and high-pressure refrigerant gas will release heat in the tube, transfer the heat to the gas in the gas storage cavity, and then release the absorbed cold to the heat transfer liquid in the liquid storage tank 31, thereby achieving a heating effect on the gas in the gas storage cavity. The flow direction of the refrigerant is opposite to that in the inflation stage, which will not be described in detail.

[0042] In one embodiment, see Figure 1-Figure 3 , one of the blocking blocks 12 is also provided with two heat exchange holes 122 connected to the air storage cavity, the internal heat exchanger 321 includes an internal heat exchange tube 3211, a first insert tube 3212 and a second insert tube 3213, the internal heat exchange tube 3211 is built in the air storage cavity and arranged around the air pipe 21, the first insert tube 3212 and the second insert tube 3213 are respectively fixedly inserted in the two heat exchange holes 122, one end of the first insert tube 3212 is connected to the second interface, the other end of the first insert tube 3212 is connected to one end of the internal heat exchange tube 3211, the other end of the internal heat exchange tube 3211 is connected to one end of the second insert tube 3213, and the other end of the second insert tube 3213 is connected to one end of the capillary tube 325.

[0043] In one embodiment, see Figure 1-Figure 3 A plurality of fins 32111 are evenly formed on the outer wall of the inner heat exchange tube 3211, and the fins 32111 are located outside the corresponding air port 211. By providing the fins 32111, the heat exchange efficiency between the inner heat exchange tube 3211 and the air storage cavity can be accelerated. By providing the fins 32111 outside the corresponding air port 211, since the outside of the air port 211 is the gas inlet and outlet position, the air flow rate is high, and thus the heat exchange efficiency between the inner heat exchange tube 3211 and the air storage cavity can be further accelerated.

[0044] In one embodiment, see Figure 1-Figure 3 A first temperature sensor 311 is also provided in the liquid storage tank 31 .

[0045] In one embodiment, see Figure 1-Figure 3The energy recycling mechanism 4 includes a second external heat exchange tube 41, a circulation pump 42, a first liquid inlet valve 43, a first liquid outlet valve 44, a second liquid inlet valve 45, a second liquid outlet valve 46 and a reflux pipe 47. The second external heat exchange tube 41 is immersed in the heat transfer liquid in the liquid storage tank 31. The second external heat exchange tube 41 contains heat exchange liquid. The inlet of the circulation pump 42 is connected to one end of the second external heat exchange tube 41. One end of the first liquid inlet valve 43 is connected to the outlet of the circulation pump 42. The other end of the first liquid inlet valve 43 is connected to one end of the heating side 5. The other end of the heating side 5 is connected to one end of the first liquid outlet valve 44, the other end of the first liquid outlet valve 44 is connected to one end of the reflux pipe 47, one end of the second liquid inlet valve 45 is connected to the outlet of the circulation pump 42, the other end of the second liquid inlet valve 45 is connected to one end of the cooling side 6, the other end of the cooling side 6 is connected to one end of the second liquid outlet valve 46, the other end of the second liquid outlet valve 46 is connected to one end of the reflux pipe 47, and the other end of the reflux pipe 47 is connected to the other end of the second external heat exchange pipe 41.

[0046] In this embodiment, when the system is started, the heating mode or the cooling mode is automatically selected according to the temperature in the liquid storage tank detected by the first temperature sensor 311. When the temperature in the liquid storage tank 31 is higher than the first preset temperature, the heating mode is entered. In the heating mode, the first liquid inlet valve 43 is opened and the second liquid inlet valve 45 is closed. The circulation pump 42 starts to work and extracts the heat exchange liquid in the second external heat exchange tube 41. The heat exchange liquid flows out from the outlet of the circulation pump 42 and enters the heating side 5 through the first liquid inlet valve 43. On the heating side 5, the heat exchange liquid releases heat to the system or space that needs to be heated and cools itself. The cooled heat exchange liquid flows out through the first liquid outlet valve 44 and enters the reflux pipe 47.

[0047] When the temperature in the liquid storage tank 31 is lower than the second preset temperature, the cooling mode is entered. In the cooling mode, the second liquid inlet valve 45 is opened and the first liquid inlet valve 43 is closed. The heat exchange liquid also flows out from the outlet of the circulation pump 42, but this time it passes through the second liquid inlet valve 45 to enter the cooling side 6. On the cooling side 6, the heat exchange liquid absorbs heat and is used to cool the system or space that needs to be cooled, and heats itself. The heated heat exchange liquid flows out through the second liquid outlet valve 46 and also enters the reflux pipe 47.

[0048] Regardless of the heating or cooling mode, the heat exchange liquid flows back to the other end of the second outer heat exchange tube 41 through the return pipe 47. In the second outer heat exchange tube 41, the heat exchange liquid exchanges heat with the heat transfer liquid in the liquid storage tank 31 to restore its initial state (cooling after heating or heating after cooling). The circulation pump 42 extracts the restored heat exchange liquid again to start a new round of circulation.

[0049] In one embodiment, see Figure 1 The energy recovery mechanism 4 also includes a liquid extraction pipe 48 and a second temperature sensor 49. One end of the liquid extraction pipe 48 is connected to one end of the second external heat exchange pipe 41, and the other end of the liquid extraction pipe 48 is connected to the inlet of the circulation pump 42. The second temperature sensor 49 is used to detect the temperature of the liquid in the liquid extraction pipe 48.

[0050] In one embodiment, see Figure 1 A circulation outlet 312 is provided at one end of the liquid storage tank 31, and a circulation inlet 313 is provided at the other end of the liquid storage tank 31. The heat exchange mechanism 3 also includes a flow component 33, and the flow component 33 includes a driving pump 331. The inlet of the driving pump 331 is connected to the circulation outlet 312, and the outlet of the driving pump 331 is connected to the circulation inlet 313. When the driving pump 331 is started, it will extract the heat transfer liquid from the circulation outlet 312 of the liquid storage tank 31 and transport it to the circulation inlet 313 through a pipeline, thereby forming a continuous circulation flow. This circulation process continuously transports the heat transfer liquid from one end of the liquid storage tank to the other end, ensuring the uniform distribution and flow of the heat transfer liquid in the liquid storage tank. It can promote the flow of the heat transfer liquid in the liquid storage tank 31 and ensure uniform temperature.

[0051] The technical solution provided by the present invention ensures the uniformity of the inflation and deflation process through the uniform gas distribution design of the gas pipe 21, reduces the risk of concrete lining cracking caused by local temperature differences, and improves the structural stability of the underground chamber. The coordinated work of the heat exchange mechanism 3 and the energy recovery mechanism 4 enables the waste heat generated during the inflation process and the waste cold generated during the deflation process to be effectively recovered and utilized. This, on the one hand, reduces energy waste and improves the overall energy efficiency of the system. On the other hand, by recovering and utilizing the waste heat, the gas temperature can be moderately reduced during the inflation process, thereby increasing the inflation volume; correspondingly, during the deflation process, the recovery and utilization of the waste cold helps to increase the gas temperature, thereby increasing the deflation volume. The energy storage potential of the energy storage chamber is enhanced, and by finely controlling the temperature of the gas in the gas storage cavity, the present invention can also reduce the temperature difference variation amplitude to which the concrete lining is subjected, which further consolidates its structural stability and prolongs its service life.

[0052] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A system for utilizing waste heat and waste cold in a compressed air energy storage underground chamber, characterized in that: include: A chamber structure, wherein the chamber structure has a closed air storage cavity, and the chamber structure is provided with an air inlet and an air outlet connected to the air storage cavity; An air charging and discharging mechanism, the air charging and discharging mechanism comprising an air pipe, one end of the air pipe extending into the air storage cavity after passing through the air outlet, the air pipe extending along the central axis of the air storage cavity, and a plurality of air ports being evenly opened on the side wall of the air pipe along the length direction; A heat exchange mechanism, the heat exchange mechanism comprising a liquid storage tank and a heat exchange component, the liquid storage tank contains a heat transfer liquid, and the heat exchange component is used to achieve heat exchange between the heat transfer liquid in the liquid storage tank and the gas in the gas storage chamber; and An energy recycling mechanism is used to realize energy exchange between the heat transfer liquid in the liquid storage tank and the external heating side or cooling side.

2. The compressed air energy storage underground chamber waste heat and waste cold utilization system according to claim 1, characterized in that: The chamber structure includes a concrete lining and two blocking blocks. The concrete lining is a cylinder with openings at both ends. The two blocking blocks are respectively fixed at both ends of the concrete lining to seal the openings at both ends of the concrete lining. The air inlet and outlet are opened at the center of one of the blocking blocks.

3. The compressed air energy storage underground chamber waste heat and waste cold utilization system according to claim 2, characterized in that: The chamber structure also includes a sealing layer, which is applied on the inner wall of the concrete lining.

4. The compressed air energy storage underground chamber waste heat and waste cold utilization system according to claim 2, characterized in that: The heat exchange assembly includes an inner heat exchanger, a first outer heat exchange tube, a compressor, a four-way valve and a capillary tube. The inner heat exchanger is arranged in the air storage cavity, the first outer heat exchange tube is immersed in the heat transfer fluid in the liquid storage tank, the first interface of the four-way valve is communicated with the outlet of the compressor, the second interface of the four-way valve is communicated with one end of the inner heat exchanger, the third interface of the four-way valve is communicated with the inlet of the compressor, the fourth interface of the four-way valve is communicated with one end of the first outer heat exchange tube, and the four-way valve can be switched to a first state or a second state. When the four-way valve is in the first state, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface. When the four-way valve is in the second state, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface. One end of the capillary tube is communicated with the other end of the inner heat exchanger, and the other end of the capillary tube is communicated with the other end of the first outer heat exchange tube.

5. The compressed air energy storage underground chamber waste heat and waste cold utilization system according to claim 4, characterized in that: One of the blocks is also provided with two heat exchange holes connected to the air storage cavity. The internal heat exchanger includes an internal heat exchange tube, a first insert tube and a second insert tube. The internal heat exchange tube is built into the air storage cavity and arranged around the air pipe. The first insert tube and the second insert tube are fixedly inserted in the two heat exchange holes respectively. One end of the first insert tube is connected to the second interface, the other end of the first insert tube is connected to one end of the internal heat exchange tube, the other end of the internal heat exchange tube is connected to one end of the second insert tube, and the other end of the second insert tube is connected to one end of the capillary tube.

6. The compressed air energy storage underground chamber waste heat and waste cold utilization system according to claim 5, characterized in that: A plurality of fins are evenly formed on the outer wall of the inner heat exchange tube, and the fins are located outside the corresponding air ports.

7. The compressed air energy storage underground chamber waste heat and waste cold utilization system according to claim 4, characterized in that: A first temperature sensor is also arranged in the liquid storage tank.

8. The compressed air energy storage underground chamber waste heat and waste cold utilization system according to claim 1, characterized in that: The energy recycling mechanism includes a second external heat exchange tube, a circulation pump, a first liquid inlet valve, a first liquid outlet valve, a second liquid inlet valve, a second liquid outlet valve and a reflux pipe. The second external heat exchange tube is immersed in the heat transfer liquid in the liquid storage tank. The inlet of the circulation pump is connected to one end of the second external heat exchange tube, one end of the first liquid inlet valve is connected to the outlet of the circulation pump, the other end of the first liquid inlet valve is connected to one end of the heating side, the other end of the heating side is connected to one end of the first liquid outlet valve, the other end of the first liquid outlet valve is connected to one end of the reflux pipe, one end of the second liquid inlet valve is connected to the outlet of the circulation pump, the other end of the second liquid inlet valve is connected to one end of the cooling side, the other end of the cooling side is connected to one end of the second liquid outlet valve, the other end of the second liquid outlet valve is connected to one end of the reflux pipe, and the other end of the reflux pipe is connected to the other end of the second external heat exchange tube.

9. The compressed air energy storage underground chamber waste heat and waste cold utilization system according to claim 8, characterized in that: The energy recovery mechanism also includes a liquid extraction pipe and a second temperature sensor. One end of the liquid extraction pipe is connected to one end of the second external heat exchange pipe, and the other end of the liquid extraction pipe is connected to the inlet of the circulation pump. The second temperature sensor is used to detect the temperature of the liquid in the liquid extraction pipe.

10. The compressed air energy storage underground chamber waste heat and waste cold utilization system according to claim 1, characterized in that: A circulation outlet is provided at one end of the liquid storage tank, and a circulation inlet is provided at the other end of the liquid storage tank. The heat exchange mechanism also includes a flow component, and the flow component includes a driving pump. The inlet of the driving pump is connected to the circulation outlet, and the outlet of the driving pump is connected to the circulation inlet.

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