A heat-regulating compressed air energy storage system and control method

Abstract

The present invention relates to the field of energy storage technology, and in particular to a heat-regulating compressed air energy storage system and a control method. A heat-regulating compressed air energy storage system comprises: a first compressor and a second compressor, the first compressor and the second compressor are connected through a first air outlet pipeline, and the air outlet end of the second compressor is provided with a second air outlet pipeline; a heat extraction component comprises a first heat exchanger, a second heat exchanger and a heat extraction tank group, the heat extraction tank group comprises a first heat extraction tank and a second heat extraction tank, the first heat extraction tank and the second heat extraction tank are respectively provided with a heat exchange medium, the first air outlet pipeline is arranged through the first heat exchanger, the second air outlet pipeline is arranged through the second heat exchanger, and the first heat exchanger is suitable for being connected to the first heat extraction tank through a pipeline. The present invention provides a heat-regulating compressed air energy storage system and a control method to solve the problem that the heat generated by the compressed air energy storage system during the compression process is recovered, and the recovered heat is stored in a certain tank body, and cannot be applied to multiple scenarios as a heat source.

Description

Technical Field

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

[0002] Compressed Air Energy Storage (CAES) is a physical energy storage technology that compresses air during off-peak periods to store energy and releases it during peak hours to generate electricity. Its core principles include the following: The energy storage phase: Electricity drives a multi-stage compressor, compressing air to high pressure and storing it in underground salt caverns, artificial chambers, or air tanks. The electrical energy is converted into pressure and thermal energy in the air. The energy release phase: After the high-pressure air is released, it is converted into mechanical energy through an expander (turbine) to drive a generator for power generation.

[0003] During the compression process, the air temperature will inevitably rise. If this heat is dissipated, it will lead to energy waste, reduced energy storage efficiency, and may even damage the equipment. Similarly, during the power generation stage, the expansion of the air will absorb heat and reduce the temperature. If there is a lack of proper heating measures, the temperature of the expanded air will drop significantly. In existing compressed air energy storage systems, the heat generated during the compression process is recovered and stored in a certain tank. As a heat source, it cannot be applied to many actual scenarios, resulting in energy waste and reduced efficiency. Summary of the Invention

[0004] In view of this, the present invention provides a heat-regulating compressed air energy storage system and a control method to solve the problem that the heat generated by the compressed air energy storage system during the compression process is recovered and stored in a certain tank. As a heat source, it cannot be applied to various practical scenarios, resulting in energy waste and reduced efficiency.

[0005] In a first aspect, the present invention provides a thermally regulated compressed air energy storage system, comprising:

[0006] At least two compressors arranged in series, including a first compressor and a second compressor, the first compressor and the second compressor are connected through a first air outlet pipeline, the air outlet end of the second compressor is provided with a second air outlet pipeline, and the first compressor is arranged upstream of the second compressor;

[0007] A heat extraction component, the heat extraction component includes a first heat exchanger, a second heat exchanger and a heat extraction tank group, the heat extraction tank group includes a first heat extraction tank and a second heat extraction tank, the first heat extraction tank and the second heat extraction tank are respectively provided with heat exchange medium, the first air outlet pipeline is arranged through the first heat exchanger, and the second air outlet pipeline is arranged through the second heat exchanger, the first heat exchanger is suitable for communicating with the first heat extraction tank through a pipeline, and the second heat exchanger is suitable for communicating with the second heat extraction tank through a pipeline.

[0008] In the energy storage state, the first and second compressors are in operation. Gas compressed by the first compressor enters the first outlet pipeline and exchanges heat with the first heat exchanger, storing the heat exchange medium in the first heat tank. Gas compressed by the second compressor enters the second outlet pipeline and exchanges heat with the second heat exchanger, storing the heat exchange medium in the second heat tank. The temperature of the heat exchange medium in the first heat tank is different from that in the second heat tank. Due to the temperature difference between the heat exchange medium in the first heat tank and the heat exchange medium in the second heat tank, the first and second heat tanks serve as heat sources to meet different industrial heat needs, achieving hierarchical heat storage and ready external supply, greatly absorbing renewable energy.

[0009] In an optional embodiment, it further includes a third compressor, a third air outlet pipeline and an air storage tank, the second compressor and the third compressor are connected through the second air outlet pipeline, and the third compressor and the air storage tank are connected through the third air outlet pipeline.

[0010] In an optional embodiment, the heat extraction component includes a heat extraction main pipe, a first heat extraction branch pipe, a second heat extraction branch pipe, a first heat extraction inflow branch pipe, and a second heat extraction inflow branch pipe. The heat extraction main pipe is provided with a first power circulation pump. One end of the heat extraction main pipe is connected to the heat extraction tank group, and the other end of the heat extraction main pipe is respectively connected to the first heat extraction branch pipe and the second heat extraction branch pipe. The first heat extraction branch pipe is connected to the first heat exchanger, the first heat extraction inflow branch pipe is respectively connected to the first heat exchanger and the first heat extraction tank, the second heat extraction branch pipe is connected to the second heat exchanger, the second heat extraction inflow branch pipe is respectively connected to the second heat exchanger and the second heat extraction tank, and the first heat extraction inflow branch pipe is connected to the second heat extraction inflow branch pipe.

[0011] In an optional embodiment, the heat extraction component also includes a third heat exchanger, a third heat extraction tank, a third heat extraction outflow branch and a third heat extraction inflow branch. The third outlet pipe passes through the third heat exchanger, and the third heat extraction outflow branch is respectively connected to the heat extraction outflow main pipe and the third heat exchanger, and the third heat extraction inflow branch is respectively connected to the third heat exchanger and the third heat extraction tank.

[0012] In an optional embodiment, a heat supply component is further included, which includes a heat supply tank, a heat exchange outflow pipeline and a first heat exchange inflow pipeline, the heat exchange outflow pipeline is respectively connected to the heat extraction tank group and the heat supply tank, and the first heat exchange inflow pipeline is respectively connected to the heat extraction tank group and the heat supply tank.

[0013] In an optional embodiment, the heat supply component also includes a first heat exchange outflow branch, a second heat exchange outflow branch and a second heat exchange inflow pipeline, the first heat exchange outflow branch is respectively connected to the heat exchange outflow pipeline and the first heat exchanger, the second heat exchange outflow branch is respectively connected to the first heat exchange outflow branch and the second heat exchanger, the second heat exchange inflow pipeline is respectively connected to the first heat exchanger and the second heat exchanger, and the second heat exchange inflow pipeline is connected to the heating tank.

[0014] In an optional embodiment, the heating component also includes an external heat source tank, a heat inflow pipeline and a heat outflow pipeline, the heat inflow pipeline is respectively connected to the heating tank and the external heat source tank, and the heat outflow pipeline is respectively connected to the heat exchange outflow pipeline and the external heat source tank.

[0015] In an optional embodiment, it also includes a power generation component, which includes a first expander, a second expander, a first air intake pipeline and a second air intake pipeline. The first expander and the gas tank are connected through the first air intake pipeline, and the first expander and the second expander are connected through the second air intake pipeline.

[0016] In an optional embodiment, the heating component also includes a heat supply outflow main pipe, a first heat supply outflow branch pipe, a second heat supply outflow branch pipe, a fourth heat exchanger, a fifth heat exchanger and a heat supply inflow pipeline. The heat supply outflow main pipe is provided with a second power circulation pump. One end of the heat supply outflow main pipe is connected to the heating tank, and the other end of the heat supply outflow main pipe is respectively connected to the first heat supply outflow branch pipe and the second heat supply outflow branch pipe. The first air intake pipeline is arranged through the fourth heat exchanger, and the first heat supply outflow branch pipe is respectively connected to the heat supply outflow main pipe and the fourth heat exchanger. The second air intake pipeline is arranged through the fifth heat exchanger, and the second heat supply outflow branch pipe is respectively connected to the heat supply outflow main pipe and the fifth heat exchanger. One end of the heat inflow pipeline is respectively connected to the fourth heat exchanger and the fifth heat exchanger, and the other end of the heat inflow pipeline is connected to the heating tank.

[0017] In an optional embodiment, the heating component also includes an external heat outflow main pipe, a first external heat outflow branch pipe, a second external heat outflow branch pipe and an external heat inflow pipeline. The external heat outflow main pipe is provided with a third power circulation pump. One end of the external heat outflow main pipe is connected to the external heat source tank, and the other end of the external heat outflow main pipe is connected to the first external heat outflow branch pipe and the second external heat outflow branch pipe respectively. The first external heat outflow branch pipe is connected to the external heat outflow main pipe and the fourth heat exchanger respectively, and the second external heat outflow branch pipe is connected to the external heat outflow main pipe and the fifth heat exchanger respectively. One end of the external heat inflow pipeline is connected to the fourth heat exchanger and the fifth heat exchanger respectively, and the other end of the external heat inflow pipeline is connected to the external heat source tank.

[0018] In the second aspect, the present invention also provides a control method for a heat-regulated compressed air energy storage system. In the energy storage state, the first compressor and the second compressor are in working state, and the gas compressed by the first compressor enters the first air outlet pipeline and exchanges heat with the first heat exchanger to store the heat exchange medium after heat exchange in the first heat tank; the gas compressed by the second compressor enters the second air outlet pipeline and exchanges heat with the second heat exchanger to store the heat exchange medium after heat exchange in the second heat tank, and the temperature of the heat exchange medium in the first heat tank is different from the temperature of the heat exchange medium in the second heat tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 Schematic diagram of a thermally regulated compressed air energy storage system according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the connection between the gas compression component, heat extraction component, heat storage tank and gas storage tank when the heat extraction tank group extracts heat according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the connection between the gas compression component, the heat extraction tank group, the heat supply component and the gas storage tank when the heat storage tank extracts heat according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the connection between the power generation component, the external heat source tank, the heating component and the gas storage tank when the heat storage tank is supplying heat according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the connection between the power generation component, external heat source tank, heating component and gas storage tank of an embodiment of the present invention when the external heat source tank provides heat.

[0025] Explanation of reference numerals: 1. gas compression assembly; 101. first compressor; 102. second compressor; 103. third compressor; 104. first air outlet pipeline; 105. second air outlet pipeline; 106. third air outlet pipeline; 107. fourth air inlet pipeline; 2. heat extraction assembly; 201. heat extraction tank group; 2011. first heat extraction tank; 2012. second heat extraction tank; 2013. third heat extraction tank; 202. heat extraction outflow main pipe; 203. first power circulation pump; 204. first heat exchanger; 205. second heat exchanger; 206. third heat exchanger; 207. first heat extraction inflow branch pipe; 208. second heat extraction inflow branch pipe; 209. The third heat inflow branch pipe; 210, the first control main valve; 211, the first heat outflow branch pipe; 212, the second heat outflow branch pipe; 213, the third heat outflow branch pipe; 214, the first control sub-valve; 215, the second control sub-valve; 216, the third control sub-valve; 217, the first flow valve; 218, the second flow valve; 219, the third flow valve; 3, heating components; 301, heat storage tank; 302, the first heat exchange inflow pipeline; 303, the heat exchange outflow pipeline; 3031, the first heat exchange outflow pipe section; 3032, the second heat exchange outflow pipe section; 3033, the third heat exchange outflow pipe section; 304, the first heat exchange outflow branch pipe; 305, the second Heat exchange outflow branch; 306, third heat exchange outflow branch; 307, second heat exchange inflow pipeline; 308, fourth power circulation pump; 309, second control main valve; 310, fourth flow valve; 311, third control main valve; 312, external heat source tank; 313, heat outflow pipeline; 314, heat inflow pipeline; 315, fifth flow valve; 316, fourth control main valve; 317, fourth heat exchanger; 318, fifth heat exchanger; 319, sixth heat exchanger; 320, heat supply outflow main pipe; 321, first heat supply outflow branch; 322, second heat supply outflow branch; 323, third heat supply outflow branch; 324, fifth control main valve; 3 25. Second power circulation pump; 326. Heat supply inflow pipeline; 327. External heat outflow main pipe; 328. First external heat outflow branch pipe; 329. Second external heat outflow branch pipe; 330. Third external heat outflow branch pipe; 331. Sixth control main valve; 332. Third power circulation pump; 333. Sixth flow valve; 334. Seventh flow valve; 335. Eighth flow valve; 336. External heat inflow pipeline; 4. Gas storage tank; 5. Power generation component; 501. First expander; 502. Second expander; 503. Third expander; 504. First air inlet pipeline; 505. Second air inlet pipeline; 506. Third air inlet pipeline; 507. Fourth air outlet pipeline. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0027] The following combination Figures 1 to 5 , describing embodiments of the present invention.

[0028] According to an embodiment of the present invention, on the one hand, a thermally regulated compressed air energy storage system is provided, comprising:

[0029] At least two compressors arranged in series, including a first compressor 101 and a second compressor 102, the first compressor 101 and the second compressor 102 are connected through a first outlet pipe 104, the outlet end of the second compressor 102 is provided with a second outlet pipe 105, and the first compressor 101 is arranged upstream of the second compressor 102;

[0030] The heat extraction component 2 includes a first heat exchanger 204, a second heat exchanger 205 and a heat extraction tank group 201. The heat extraction tank group 201 includes a first heat extraction tank 2011 and a second heat extraction tank 2012. The first heat extraction tank 2011 and the second heat extraction tank 2012 are respectively provided with heat exchange medium. The first air outlet pipeline 104 is arranged through the first heat exchanger 204, and the second air outlet pipeline 105 is arranged through the second heat exchanger 205. The first heat exchanger 204 is suitable for communicating with the first heat extraction tank 2011 through a pipeline, and the second heat exchanger 205 is suitable for communicating with the second heat extraction tank 2012 through a pipeline.

[0031] In the energy storage state, the first compressor 101 and the second compressor 102 are in operation. The gas compressed by the first compressor 101 enters the first outlet pipe 104 for heat exchange with the first heat exchanger 204, and the heat exchanged medium is stored in the first heat extraction tank 2011. The gas compressed by the second compressor 102 enters the second outlet pipe 105 for heat exchange with the second heat exchanger 205, and the heat exchanged medium is stored in the second heat extraction tank 2012. The temperature of the heat exchange medium in the first heat extraction tank 2011 is different from the temperature of the heat exchange medium in the second heat extraction tank 2012. Due to the difference in temperature between the heat exchange medium in the first heat extraction tank 2011 and the heat exchange medium in the second heat extraction tank 2012, the first heat extraction tank 2011 and the second heat extraction tank 2012 serve as heat sources to meet different industrial heat needs, realize hierarchical heat storage and timely external supply, and greatly absorb renewable energy. It should be noted that the power for the first compressor 101 and the second compressor 102 in this application comes from green renewable energy sources such as wind and solar energy, or excess electricity generated by power plants. That is, the electricity generated by green renewable energy sources such as solar and wind energy enters the power grid (or excess energy within the power grid) and is then used by the compressors to compress air, thus solving the problem of absorbing renewable energy. It should be noted that the term "upstream" in this embodiment refers to the direction of gas flow, and "the first compressor 101 is located upstream of the second compressor 102" means that the gas first passes through the first compressor 101 before entering the second compressor 102.

[0032] In one embodiment, Figure 1 As shown, the system also includes a gas compression assembly 1, which includes the aforementioned first compressor 101, second compressor 102, first outlet pipeline 104, and second outlet pipeline 105. It also includes a third compressor 103, third outlet pipeline 106, and gas storage tank 4. The second and third compressors 102 and 103 are connected via the second outlet pipeline 105, and the third compressor 103 and gas storage tank 4 are connected via the third outlet pipeline 106. Gas passes through the first, second, and third compressors 101, 102, and 103 in sequence before being stored in the gas storage tank 4. The gas in the gas storage tank 4 is at room temperature and high pressure, preparing for the next energy release. In this embodiment, the second compressor 102 is located upstream of the third compressor 103, and the gas enters the third compressor 103 after passing through the second compressor 102. It is important to note that the gas compression assembly 1 also includes a fourth inlet pipeline 107, which is connected to the inlet end of the first compressor 101 to draw gas from the environment. Specifically, the gas is air.

[0033] In one embodiment, Figure 1 、 Figure 2 and Figure 3As shown, the heat extraction component 2 includes a heat extraction main pipe 202, a first heat extraction branch pipe 211, a second heat extraction branch pipe 212, a first heat extraction inflow branch pipe 207, and a second heat extraction inflow branch pipe 208. The heat extraction main pipe 202 is provided with a first power circulation pump 203. One end of the heat extraction main pipe 202 is connected to the heat extraction tank group 201, and the other end of the heat extraction main pipe 202 is connected to the first heat extraction branch pipe 211, the second heat extraction branch pipe 212, the first heat extraction inflow branch pipe 207, and the second heat extraction inflow branch pipe 208. The pipe 212 is connected, the first heat outflow branch pipe 211 is connected to the first heat exchanger 204, the first heat inflow branch pipe 207 is connected to the first heat exchanger 204 and the first heat extraction tank 2011 respectively, the second heat outflow branch pipe 212 is connected to the second heat exchanger 205, the second heat inflow branch pipe 208 is connected to the second heat exchanger 205 and the second heat extraction tank 2012 respectively, and the first heat inflow branch pipe 207 is connected to the second heat inflow branch pipe 208. The heat exchange medium in the heat extraction tank group 201 is distributed to the first heat extraction inlet branch 207 and the second heat extraction inlet branch 208 via the heat extraction outflow main pipe 202. After exchanging heat with the compressed gas in the first heat exchanger 204 and the second heat exchanger 205, the heat exchange medium flows into the first heat extraction tank 2011 through the first heat extraction inlet branch 207 and into the second heat extraction tank 2012 through the second heat extraction inlet branch 208, respectively. The first power circulation pump 203 provides circulation power throughout the entire process. Specifically, the first power circulation pump 203 is a liquid power pump. It should be noted that the heat exchange medium in this embodiment is pressurized water.

[0034] In one embodiment, Figure 1 、 Figure 2 and Figure 3 As shown, the heat extraction assembly 2 further includes a third heat exchanger 206, a third heat extraction tank 2013, a third heat extraction outflow branch pipe 213, and a third heat extraction inflow branch pipe 209. The third outlet pipeline 106 is disposed through the third heat exchanger 206. The third heat extraction outflow branch pipe 213 is respectively connected to the heat extraction outflow main pipe 202 and the third heat exchanger 206. The third heat extraction inflow branch pipe 209 is respectively connected to the third heat exchanger 206 and the third heat extraction tank 2013. The heat exchange medium in the third heat extraction outflow branch pipe 213 flows into the third heat exchanger 206 after passing through the heat extraction outflow main pipe 202. After heat exchange with the compressed gas in the third outlet pipeline 106 in the third heat exchanger 206, the heat exchange medium flows into the third heat extraction inflow branch pipe 209 and finally into the third heat extraction tank 2013. It should be noted that the temperature of the heat exchange medium in the third heat extraction tank 2013 is greater than the temperature of the heat exchange medium in the second heat extraction tank 2012 and greater than the temperature of the heat exchange medium in the first heat extraction tank 2011 .

[0035] In this embodiment, in order to realize automatic control, Figure 1 、 Figure 2As shown, a first control main valve 210 is also provided on the heat outflow main pipe 202, and the first control main valve 210 is located upstream of the first power circulation pump 203, and the first power circulation pump 203 is located upstream of the connection point between the heat outflow main pipe 202 and the first heat outflow branch pipe 211, a first control sub-valve 214 is provided on the first heat outflow branch pipe 211, a second control sub-valve 215 is provided on the second heat outflow branch pipe 212, and a third control sub-valve 216 is provided on the third heat outflow branch pipe 213, a first flow valve 217 is provided on the first heat inflow branch pipe 207, a second flow valve 218 is provided on the second heat inflow branch pipe 208, and a third flow valve 219 is provided on the third heat inflow branch pipe 209. Specifically, the first main control valve 210, first sub-control valve 214, second sub-control valve 215, and third sub-control valve 216 are all electromagnetic control valves, and the first flow valve 217, second flow valve 218, and third flow valve 219 are all electromagnetic flow valves. It should be noted that the heat extraction outflow main pipe 202 is connected to the first heat extraction tank 2011, the second heat extraction tank 2012, and the third heat extraction tank 2013 via a first four-way valve to select the heat exchange medium from one of the first heat extraction tank 2011, the second heat extraction tank 2012, and the third heat extraction tank 2013. Specifically, the first four-way valve is an electromagnetic four-way valve.

[0036] In one embodiment, Figure 1 、 Figure 2 and Figure 3 As shown, the heat supply assembly 3 is also included. The heat supply assembly 3 includes a heat supply tank, a heat exchange outflow pipe 303, and a first heat exchange inflow pipe 302. The heat exchange outflow pipe 303 connects the heat extraction tank group 201 and the heat supply tank, respectively, while the first heat exchange inflow pipe 302 connects the heat extraction tank group 201 and the heat supply tank. The heat exchange medium in the heat supply tank flows to the heat extraction tank group 201 through the heat exchange outflow pipe 303, and the heat exchange medium in the heat extraction tank group 201 flows to the heat supply tank through the first heat exchange inflow pipe 302. It should be noted that the heat exchange outflow line 303 is connected to the first heat extraction tank 2011, the second heat extraction tank 2012, and the third heat extraction tank 2013 via a second four-way valve, allowing the heat exchange medium in the heat exchange outflow line 303 to flow into one of the first, second, and third heat extraction tanks 2011, 2012, and 2013. The first heat exchange inflow line 302 is connected to the first, second, and third heat extraction tanks 2011, 2012, and 2013 via a third four-way valve, allowing the heat exchange medium to be drawn from one of the first, second, and third heat extraction tanks 2011, 2012, and 2013. Specifically, the second and third four-way valves are electromagnetic four-way valves. Furthermore, temperature sensors are installed in the heating tank, the first, second, and third heat extraction tanks 2011, 2012, and 2013, respectively.

[0037] In this embodiment, if Figure 3 As shown, the heat exchange outflow pipeline 303 is sequentially provided with a first heat exchange outflow pipe section 3031, a second heat exchange outflow pipe section 3032, and a third heat exchange outflow pipe section 3033 from the heat supply tank toward the heat extraction tank group 201. The first heat exchange outflow pipe section 3031 is provided with a fourth power circulation pump 308 and a second control main valve 309, with the second control main valve 309 located upstream of the third power pump. The second heat exchange outflow pipe section 3032 is provided with a fourth flow valve 310, and the third heat exchange outflow pipe section 3033 is provided with a third control main valve 311. Specifically, the second control main valve 309 and the third control main valve 311 are electromagnetic valves, the fourth flow valve 310 is an electromagnetic flow valve, and the fourth power circulation pump 308 is a power pump for conveying liquid.

[0038] In one embodiment, Figure 1 、 Figure 3 As shown, the heating component 3 also includes a first heat exchange outflow branch 304, a second heat exchange outflow branch 305 and a second heat exchange inflow pipeline 307. The first heat exchange outflow branch 304 is connected to the heat exchange outflow pipeline 303 and the first heat exchanger 204 respectively, the second heat exchange outflow branch 305 is connected to the first heat exchange outflow branch 304 and the second heat exchanger 205 respectively, the second heat exchange inflow pipeline 307 is connected to the first heat exchanger 204 and the second heat exchanger 205 respectively, and the second heat exchange inflow pipeline 307 is connected to the heating tank. The heat exchange medium in the heat supply tank is transported via the heat exchange outflow pipe 303 to the first heat exchange outflow branch pipe 304 and the second heat exchange outflow branch pipe 305, respectively. The first heat exchange outflow branch pipe 304 then transports the heat exchange medium to the first heat exchanger 204 for heat exchange with the compressed gas in the first outlet pipe 104 within the first heat exchanger 204. The second heat exchange outflow branch pipe then transports the heat exchange medium to the second heat exchanger 205 for heat exchange with the compressed gas in the second outlet pipe 105 within the second heat exchanger 205. After heat exchange, the heat exchange medium enters the second heat exchange inflow pipe 307 and flows back into the heat supply tank. It should be noted that the connection between the first heat exchange outflow branch pipe 304 and the heat exchange outflow pipe 303 is located between the second heat exchange outflow pipe section 3032 and the third heat exchange outflow pipe section 3033.

[0039] In this embodiment, if Figure 1 、 Figure 3As shown, the heating component 3 also includes a third heat exchange outflow branch 306, which is connected to the second heat exchange outflow branch 305 and the third heat exchanger 206 respectively, and the second heat exchange inflow pipeline 307 is connected to the third heat exchanger 206. The second heat exchange branch delivers a portion of the heat exchange medium to the third heat exchange outflow branch 306, and the third heat exchange outflow branch 306 delivers the heat exchange medium to the third heat exchanger 206 to exchange heat with the compressed gas in the third outlet pipeline 106 in the third heat exchanger 206. The heat exchange medium after heat exchange enters the second heat exchange inflow pipeline 307 and flows back to the heating tank.

[0040] In one embodiment, Figure 1 、 Figure 4 As shown, the heating assembly 3 further includes an external heat source tank 312, a heat inflow pipe 314, and a heat outflow pipe 313. The heat inflow pipe 314 is in communication with the heating tank and the external heat source tank 312, respectively, and the heat outflow pipe 313 is in communication with the heat exchange outflow pipe 303 and the external heat source tank 312, respectively. In this embodiment, a heat exchange medium is stored in the external heat source tank 312. The heat inflow pipe 314 is provided to transport the heat exchange medium in the external heat source tank 312 to the heating tank, and the heat outflow pipe 313 is provided to transport the heat exchange medium in the heating tank to the external heat source tank 312, thereby achieving heat exchange and energy replenishment between the two tanks. It should be noted that the connection between the heat outflow pipeline 313 and the heat exchange outflow pipeline 303 is located between the first heat exchange outflow pipeline section 3031 and the second heat exchange outflow pipeline section 3032. A fifth flow valve 315 is provided on the heat outflow pipeline 313, and a fourth control main valve 316 is provided on the heat inflow pipeline 314. Specifically, the fourth control main valve 316 is an electromagnetic valve, and the fifth flow valve 315 is an electromagnetic flow control valve.

[0041] In one embodiment, Figure 1 、 Figure 4 and Figure 5 As shown, the system further includes a power generation assembly 5, which includes a first expander 501, a second expander 502, a first air inlet pipeline 504, and a second air inlet pipeline 505. The first expander 501 and the gas storage tank 4 are connected via the first air inlet pipeline 504, and the first expander 501 and the second expander 502 are connected via the second air inlet pipeline 505. Normal temperature and high pressure gas stored in the gas storage tank 4 enters the first expander 501 through the first air inlet pipeline 504 to drive the first expander 501 to generate power, and then enters the second expander 502 through the second air inlet pipeline 505 to drive the second expander 502 to generate power. The first expander 501 is located upstream of the second expander 502.

[0042] In this embodiment, if Figure 1 、 Figure 4 and Figure 5 As shown, the power generation component 5 also includes a third expander 503, a third air inlet pipeline 506 and a fourth air outlet pipeline 507. The second expander 502 and the third expander 503 are connected through the third air inlet pipeline 506, and the fourth air outlet pipeline 507 is arranged at the air outlet end of the third expander 503, so that the gas enters the third air inlet pipeline 506 through the second expander 502, and then enters the third expander 503 through the third air inlet pipeline 506 to push the third expander 503 to work and generate electricity until it is discharged into the environment through the fourth air outlet pipeline 507.

[0043] In one embodiment, Figure 1 、 Figure 4 and Figure 5 As shown, the heating assembly 3 also includes a heat outflow main pipe 320, a first heat outflow branch pipe 321, a second heat outflow branch pipe 322, a fourth heat exchanger 317, a fifth heat exchanger 318 and a heat inflow pipe 326. The heat outflow main pipe 320 is provided with a second power circulation pump 325. One end of the heat outflow main pipe 320 is connected to the heating tank, and the other end of the heat outflow main pipe 320 is respectively connected to the first heat outflow branch pipe 321 and the second heat outflow branch pipe 322. The first air inlet pipe 504 is set to pass through the fourth heat exchanger 317, and the first heat supply outflow branch pipe 321 is connected to the heat supply outflow main pipe 320 and the fourth heat exchanger 317 respectively. The second air intake pipe 505 is set to pass through the fifth heat exchanger 318, and the second heat supply outflow branch pipe 322 is connected to the heat supply outflow main pipe 320 and the fifth heat exchanger 318 respectively. One end of the heat supply inflow pipe 326 is connected to the fourth heat exchanger 317 and the fifth heat exchanger 318 respectively, and the other end of the heat supply inflow pipe 326 is connected to the heating tank. Driven by the second power circulation pump 325, the heat exchange medium of the heat supply tank flows into the first heat supply outflow branch 321 and the second heat supply outflow branch 322 respectively through the heat supply outflow main pipe 320. The heat exchange medium in the first heat supply outflow branch 321 exchanges heat with the compressed gas in the first air inlet pipeline 504 in the fourth heat exchanger 317, providing heat for the compressed gas in the first air inlet pipeline 504 and increasing the gas temperature, thereby driving the first expander 501 to perform work. After flowing out of the fourth heat exchanger 317, the heat exchange medium flows into the heat supply inflow pipe and then flows back to the heat supply tank. The heat exchange medium in the second heat supply outflow branch 322 exchanges heat with the compressed gas in the second air inlet pipeline 505 in the fifth heat exchanger 318, providing heat for the compressed gas in the second air inlet pipeline 505 and increasing the gas temperature, thereby driving the second expander 502 to perform work. After flowing out of the fifth heat exchanger 318, the heat exchange medium flows into the heat supply inflow pipe and then flows back to the heat supply tank.

[0044] In this embodiment, if Figure 1 、 Figure 4 and Figure 5As shown, the heating assembly 3 also includes a third heat supply outflow branch 323 and a sixth heat exchanger 319. The third heat supply outflow branch 323 is connected to the heat supply outflow main pipe 320. The third air inlet pipeline 506 is disposed through the sixth heat exchanger 319, and the heat supply inflow pipeline 326 is connected to the sixth heat exchanger 319. The heat exchange medium in the third heat supply outflow branch 323 exchanges heat with the compressed gas in the third air inlet pipeline 506 in the sixth heat exchanger 319, providing heat to the compressed gas in the third air inlet pipeline 506 and raising the gas temperature, thereby driving the third expander 503 to perform work. After flowing out of the sixth heat exchanger 319, the heat exchange medium flows into the heat supply inflow pipeline and then flows back into the heating tank. To achieve pipeline control, a fifth control main valve 324 is also provided on the heat supply outflow main pipe 320, and the fifth control main valve 324 is located upstream of the second power circulation pump 325. Specifically, the fifth control main valve 324 is an electromagnetic control valve. It should be noted that the fourth heat exchanger 317 is located upstream of the first expander 501, the fifth heat exchanger 318 is located upstream of the second expander 502, and the sixth heat exchanger 319 is located upstream of the third expander 503, and the first expander 501, the second expander 502 and the third expander 503 are arranged in series.

[0045] In one embodiment, Figure 1 、 Figure 5 As shown, the heating component 3 also includes an external heat outflow main pipe 327, a first external heat outflow branch pipe 328, a second external heat outflow branch pipe 329 and an external heat inflow pipeline 336. The external heat outflow main pipe 327 is provided with a third power circulation pump 332. One end of the external heat outflow main pipe 327 is connected to the external heat source tank 312, and the other end of the external heat outflow main pipe 327 is respectively connected to the first external heat outflow branch pipe 328 and the second external heat outflow branch pipe 329. The first external heat outflow branch pipe 328 is respectively connected to the external heat outflow main pipe 327 and the fourth heat exchanger 317, and the second external heat outflow branch pipe 329 is respectively connected to the external heat outflow main pipe 327 and the fifth heat exchanger 318. One end of the external heat inflow pipeline 336 is respectively connected to the fourth heat exchanger 317 and the fifth heat exchanger 318, and the other end of the external heat inflow pipeline 336 is connected to the external heat source tank 312. The heat exchange medium in the external heat source tank 312 flows out through the external heat outflow main pipe 327, and reaches the first external heat outflow branch pipe 328 and the second external heat outflow branch pipe 329 respectively, and reaches the fourth heat exchanger 317 through the first external heat outflow branch pipe 328 to exchange heat with the gas in the first air inlet pipe 504, providing heat for the gas and increasing the gas temperature, and then flows into the external heat inflow pipe 336, and finally flows back to the external heat source tank 312; reaches the fifth heat exchanger 318 through the second external heat outflow branch pipe 329 to exchange heat with the gas in the second air inlet pipe 505, providing heat for the gas and increasing the gas temperature, and then flows into the external heat inflow pipe 336, and finally flows back to the external heat source tank 312.

[0046] In one embodiment, Figure 1 ,and Figure 5 As shown, the heating assembly 3 also includes a third external heat outflow branch pipe 330, wherein the third external heat outflow branch pipe 330 is connected to the sixth heat exchanger 319 and the external heat outflow main pipe 327 respectively. The heat exchange medium in the external heat outflow main pipe 327 flows into the third external heat outflow branch pipe 330, and then reaches the sixth heat exchanger 319 through the third external heat outflow branch pipe 330 to exchange heat with the gas in the third air inlet pipe 506, providing heat to the gas and increasing the gas temperature. The heat then flows into the external heat inflow pipe 336 and finally flows back to the external heat source tank 312. To achieve pipeline control, a sixth control main valve 331 is provided on the external heat outflow main pipe 327. Specifically, the sixth control main valve 331 is an electromagnetic control valve. To achieve flow control, a sixth flow valve 333 is provided on the first external heat outflow branch pipe 328 , a seventh flow valve 334 is provided on the second external heat outflow branch pipe 329 , and an eighth flow valve 335 is provided on the third external heat outflow branch pipe 330 .

[0047] To achieve automatic control, a controller is further included, which is respectively connected to the first control main valve 210, the second control main valve 309, the third control main valve 311, the fourth control main valve 316, the fifth control main valve 324, the sixth control main valve 331, the first flow valve 217, the second flow valve 218, the third flow valve 219, the fourth flow valve 310, the fifth flow valve 315, the sixth flow valve 333, the seventh flow valve 334, the eighth flow valve 335, the first power circulation pump 203, the second power circulation pump 325, the third power circulation pump 332, and the fourth power circulation pump 308. In addition, the heat exchange medium in the heat extraction tank group 201, the heat storage tank 301, and the external heat source tank 312 in this embodiment is all the same substance.

[0048] The thermally regulated compressed air energy storage system provided in this embodiment is used for peak load regulation of the power grid and has an energy storage state and an energy release state. The energy storage state refers to when the power grid has excess power, it is used to absorb excess power generated by wind power, solar power, power plants, etc.; the energy release state refers to when the power grid is insufficient, the expander performs work to provide power to the grid.

[0049] A control method for a thermally regulated compressed air energy storage system, in an energy storage state, comprises the following steps:

[0050] (1) The excess power of the grid starts the first compressor 101, the second compressor 102 and the third compressor 103, starts the first power circulation pump 203, opens the first control main valve 210, the first control sub-valve 214 and the first flow valve 217, and the external gas enters the first compressor 101 through the fourth air inlet pipe 107. The pressure of the gas compressed by the first compressor 101 is the first pressure and the temperature rises. The gas compressed by the first compressor 101 is discharged through the first air outlet pipe 10 4 enters the first heat exchanger 204, and the heat outflow main pipe 202 extracts the heat exchange medium in the heat extraction tank group 201. The heat exchange medium enters the first heat exchanger 204 through the first heat extraction outflow branch pipe 211 to exchange heat with the gas in the first outlet pipe 104, cooling the heated gas to room temperature. After flowing out of the first heat exchanger 204, the heat exchange medium flows into the first heat extraction tank 2011 through the first heat extraction inflow branch pipe 207, so that the temperature of the heat exchange medium in the first heat extraction tank 2011 is the first temperature;

[0051] After the gas at the first pressure after heat exchange enters the second compressor 102, the second control sub-valve 215 and the second flow valve 218 are opened, and the pressure of the gas compressed by the second compressor 102 increases from the first pressure to the second pressure, and the temperature increases again. The gas compressed by the second compressor 102 enters the second heat exchanger 205 through the second gas outlet pipeline 105, and the heat outflow main pipe 202 distributes a part of the extracted heat exchange medium to the second heat outflow branch. The heat exchange medium enters the second heat exchanger 205 through the second heat outflow branch 212 and exchanges heat with the gas in the second air inlet pipeline 505, cooling the gas with the increased temperature to room temperature. After flowing out of the second heat exchanger 205, the heat exchange medium flows into the second heat extraction tank 2012 through the second heat inflow branch 208, so that the temperature of the heat exchange medium in the second heat extraction tank 2012 is the second temperature;

[0052] After the gas at the second pressure after heat exchange enters the third compressor 103, the third control valve 216 and the third flow valve 219 are opened. The pressure of the gas compressed by the third compressor 103 rises from the second pressure to the third pressure, and the temperature rises again. The gas compressed by the third compressor 103 enters the third heat exchanger 206 through the third outlet pipe 106. The heat outflow main pipe 202 distributes a part of the extracted heat exchange medium to the third heat outflow branch. The heat exchange medium flows through the third heat outflow branch pipe. 213 enters the third heat exchanger 206 to exchange heat with the gas in the third gas outlet pipeline 106, cooling the heated gas to room temperature. After flowing out of the third heat exchanger 206, the heat exchange medium flows into the third heat extraction tank 2013 through the third heat extraction inflow branch pipe 209, so that the temperature of the heat exchange medium in the third heat extraction tank 2013 is the third temperature. After heat exchange, the gas at the third pressure flows into the gas storage tank 4 through the third gas outlet pipeline 106. The gas pressure in the gas storage tank 4 is the third pressure and the temperature is room temperature.

[0053] (2) While the heat extraction tank group 201 absorbs heat, the heat supply component 3 also absorbs a portion of heat. The fourth power circulation pump 308, the second control main valve 309 and the fourth flow valve 310 are opened, and the third control main valve 311 is closed. The heat exchange medium in the heat storage tank 301 is driven by the fourth power circulation pump 308 and passes through the first heat exchange outflow pipe section 3031 and the second heat exchange outflow pipe section 3032, and the heat exchange medium is distributed to the first heat exchange outflow branch pipe 304, the second heat exchange outflow branch pipe 305 and the third heat exchange outflow branch pipe 306. The heat outflow branch pipe 306: the heat exchange medium passes through the first heat outflow branch pipe 304 to the first heat exchanger 204 for heat absorption and heat exchange, passes through the second heat outflow branch pipe 305 to the second heat exchanger 205 for heat absorption and heat exchange, and passes through the third heat outflow branch pipe 306 to the third heat exchanger 206 for heat absorption and heat exchange. The heat exchange medium with increased temperature flows into the second heat inflow pipe 307 and then flows into the heat storage tank 301. The temperature of the heat exchange medium in the heat storage tank 301 is the fourth temperature.

[0054] (3) After the compressor stops working, when the temperature of the heat exchange medium in the heat storage tank 301 drops and cannot reach the fourth temperature, the external heat source tank 312 provides heat as a supplement. At this time, the first control main valve 210, the fourth flow valve 310, the first control sub-valve 214, the second control sub-valve 215, and the third control sub-valve 216 are all in a closed state, the first power circulation pump 203 is closed, and the fourth control main valve 316 and the fifth flow valve 315 are opened, so that the heat exchange medium in the external heat source tank 312 enters the heat storage tank 301 through the heat inflow pipe 314, and the heat exchange medium in the heat storage tank 301 enters the external heat source tank 312 through the first heat exchange outflow pipe section 3031 and the heat inflow pipe 314, until the temperature of the heat exchange medium in the heat storage tank 301 reaches the fourth temperature.

[0055] It should be noted that the first temperature range is 70°C-115°C, the second temperature range is 100°C-150°C, the third temperature range is 130°C-180°C, and the fourth temperature range is 80°C-160°C. The first, second, and third temperature values ​​are all different: the first temperature > the second temperature > the third temperature. On-site personnel can determine the specific values ​​of the first, second, third, and fourth temperatures based on actual needs. The heat exchange medium at the first temperature is used as a heat source for heating industrial parks and food disinfection (for example, the pharmaceutical industry uses heat around 100°C to rinse and disinfect packaging bottles to kill microorganisms on the bottle surface); the heat exchange medium at the second temperature is used as a heat source in the petrochemical, plastics processing, and rubber industries; and the heat exchange medium at the third temperature is used as a heat source in the chemical and electronics industries. Furthermore, when in the energy storage state, the external heat source tank 312 receives heat from an external source, such as a solar collector, a wind-heat unit, or industrial waste heat.

[0056] A control method for a thermally regulated compressed air energy storage system, in an energy release state, comprises the following steps:

[0057] (1) When the generator set needs to generate electricity, the first expander 501, the second expander 502 and the third expander 503 are started, and the normal temperature and high pressure gas in the gas storage tank 4 enters the first expander 501 through the first air inlet pipe 504. The fifth control main valve 324 and the second power circulation pump 325 are opened, and the heat exchange medium in the heat storage tank 301 enters the fourth heat exchanger 317 through the heat supply outflow main pipe 320 and the first heat supply outflow branch pipe 321. The normal temperature and high pressure gas in the first air inlet pipe 504 exchanges heat with the heat exchange medium in the fourth heat exchanger 317. The gas absorbs heat and heats up, enters the first expander 501, and drives the first expander 501 to generate electricity, and then cools down and reduces pressure. The heat exchange medium in the fourth heat exchanger 317, after releasing heat, flows back to the heat storage tank 301 through the heat supply inflow pipe 326;

[0058] The gas to be cooled passes through the first expander 501 and enters the second air inlet pipeline 505. The heat exchange medium in the heat supply outlet main pipe 320 enters the fifth heat exchanger 318 through the second heat supply outlet branch pipe 322. The gas in the second air inlet pipeline 505 exchanges heat with the heat exchange medium in the fifth heat exchanger 318. After absorbing heat and heating up again, the gas enters the second expander 502 to drive the second expander 502 to generate power, and then cools down and reduces the pressure. The heat exchange medium, which has released heat in the fifth heat exchanger 318, flows back to the heat storage tank 301 through the heat supply inlet pipeline 326.

[0059] The gas to be cooled passes through the second expander 502 and enters the third air inlet pipeline 506. The heat exchange medium in the heat supply outflow main pipe 320 enters the sixth heat exchanger 319 through the third heat supply outflow branch pipe 323. The gas in the third air inlet pipeline 506 exchanges heat with the heat exchange medium in the sixth heat exchanger 319. After absorbing heat and heating up again, the gas enters the third expander 503 to drive the third expander 503 to generate power, and then cools down and reduces the pressure. The heat exchange medium that has released heat in the sixth heat exchanger 319 flows back to the heat storage tank 301 through the heat supply inflow pipeline 326.

[0060] (2) When the heat storage tank 301 releases heat, the external heat source tank 312 also releases heat. The sixth control main valve 331, the third power circulation pump 332, the sixth flow valve 333, the seventh flow valve 334 and the eighth flow valve 335 are opened. The heat exchange medium in the external heat source tank 312 flows through the external heat outflow main pipe 327 and is distributed to the first external heat outflow branch pipe 328, the second external heat outflow branch pipe 329 and the third external heat outflow branch pipe 330. The heat exchange medium enters the external heat outflow branch pipe 328 through the first external heat outflow branch pipe The fourth heat exchanger 317 provides heat for the gas in the first air intake pipeline 504. The heat exchange medium enters the fifth heat exchanger 318 through the second external heat outflow branch 329 to provide heat for the gas in the second air intake pipeline 505. The heat exchange medium enters the sixth heat exchanger 319 through the third external heat outflow branch 330 to provide heat for the gas in the third air intake pipeline 506. After heat exchange, the heat exchange medium flows into the external heat inflow pipeline 336 and then flows back to the external heat source tank 312 through the external heat inflow pipeline 336.

[0061] (3) When the temperature of the heat exchange medium in the heat storage tank 301 decreases after being used for a period of time, heat can be supplemented through the external heat source tank 312, and the fourth power circulation pump 308, the second control main valve 309, the fifth flow valve 315, and the fourth control main valve 316 are opened to allow the heat exchange medium in the external heat source tank 312 to enter the heat storage tank 301 through the heat inflow pipe 314, and the heat exchange medium in the heat storage tank 301 to enter the external heat source tank 312 through the first heat exchange outflow pipe section 3031 and the heat inflow pipe 314 until the temperature of the heat exchange medium in the heat storage tank 301 reaches the fourth temperature;

[0062] (4) Under extreme conditions, when the heat in the heat storage tank 301 and the external heat source tank 312 is insufficient, the heat extraction tank group 201 needs to provide heat for the heat storage tank 301, close the fifth flow valve 315 and the fourth control main valve 316, open the fourth power circulation pump 308, the second control main valve 309, the fourth flow valve 310 and the third control main valve 311, and the heat exchange medium in the heat storage tank 301 flows out of the heat exchange outflow pipe 303 through the second four-way valve and is connected to a heat extraction tank (preferably the third heat extraction tank 2013) in the heat extraction tank group 201. The heat exchange medium in the heat extraction tank (preferably the third heat extraction tank 2013) enters the first heat exchange inflow pipe 302 through the third four-way valve, and then enters the heat storage tank 301 from the first heat exchange inflow pipe 302, thereby realizing heat exchange between the heat storage tank 301 and the heat extraction tank group 201.

[0063] It should be noted that the energy of the heat exchange medium in the external heat source tank 312 comes from wind energy, solar power generation, industrial waste heat, etc., and the temperature inside the external autoclave is higher than the temperature inside the heat storage tank 301. In addition, when in the energy release state, the external heat source tank 312 can receive heat such as industrial waste heat that is equal to or higher than the temperature inside the external heat source tank 312. Since the energy release state requires electrical energy, it can no longer receive heat converted from electrical energy, and instead receives industrial waste heat to supplement the heat.

[0064] The heat-regulating compressed air energy storage system and control method provided by the present invention have the following advantages: (1) in the energy storage state, the compressed air is heat-extracted, and the graded storage of the heat after heat extraction is realized. The different temperatures of the heat exchange medium in different heat extraction tanks are used as heat sources to be suitable for different scenarios; (2) in the energy storage process, part of the heat generated by the compressed air is transferred to the heat extraction tank group 201 and the other part is transferred to the heat storage tank 301, thereby realizing the maximum absorption of heat; (3) in the energy storage state, the external heat source tank 312 is used to absorb additional electrical energy from solar energy, wind energy, etc., and the heat extraction component 2 and the external heat source tank 312 cooperate to realize the maximum utilization of electrical energy; (4) after the energy storage is completed and before the energy release begins, when the heat in the heat storage tank 301 is not When the heat storage tank 301 is sufficient, the external heat source tank 312 provides heat to the heat storage tank 301 to prepare for the subsequent energy release; (5) During the energy release process, the heat storage tank 301 and the external heat source tank 312 jointly provide heat to the gas to ensure that the gas meets the temperature increase requirement in the process of pushing the expander to do work; (6) During the energy release process, after the heat storage tank 301 has been used for a period of time, the external heat source tank 312 provides heat to the heat storage tank 301, thereby maximizing the utilization of the heat in the external heat source tank 312; (7) During the energy release process, when the heat in the external heat source tank 312 is insufficient, the heat tank group 201 provides heat to the heat storage tank 301 to ensure that the heat in the heat storage tank 301 is sufficient, and the external heat source tank 312 does not accept external heat, so that the electric energy originally supplied to the external heat source tank 312 is first supplied to the power grid, thereby maximizing the saving of electric energy.

[0065] As an alternative embodiment, the number of compressors of the air compression assembly can also be two, four, five or even more, and the number of compressors and the number of heat extraction tanks are set in a one-to-one correspondence.

[0066] As an alternative embodiment, the number of expanders in the power generation component 5 can also be two, four, five or even more.

[0067] As an alternative embodiment, the heat exchange medium may also be other substances with heat conductive properties such as thermal oil and molten salt.

[0068] As an alternative embodiment, the temperature of the heat exchange medium in the third heat extraction tank 2013 is less than the temperature of the heat exchange medium in the second heat extraction tank 2012 and less than the temperature of the heat exchange medium in the first heat extraction tank 2011; or, the temperature of the heat exchange medium in the second heat extraction tank 2012 is greater than the temperature of the heat exchange medium in the third heat extraction tank 2013 and greater than the temperature of the heat exchange medium in the first heat extraction tank 2011, etc. (since there are many combinations of the heat exchange medium temperatures in the three heat extraction tanks, in summary, the heat exchange medium temperatures in the three heat extraction tanks are different).

[0069] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A thermally regulated compressed air energy storage system, characterized in that: include: At least two compressors arranged in series, comprising a first compressor (101) and a second compressor (102), wherein the first compressor (101) and the second compressor (102) are connected via a first air outlet pipeline (104), a second air outlet pipeline (105) is provided at the air outlet end of the second compressor (102), and the first compressor (101) is arranged upstream of the second compressor (102); A heat extraction component (2), the heat extraction component (2) comprising a first heat exchanger (204), a second heat exchanger (205) and a heat extraction tank group (201), the heat extraction tank group (201) comprising a first heat extraction tank (2011) and a second heat extraction tank (2012), a heat exchange medium being provided in each of the first heat extraction tank (2011) and the second heat extraction tank (2012), the first air outlet pipeline (104) being arranged through the first heat exchanger (204), the second air outlet pipeline (105) being arranged through the second heat exchanger (205), the first heat exchanger (204) being adapted to be in communication with the first heat extraction tank (2011) via a pipeline, and the second heat exchanger (205) being adapted to be in communication with the second heat extraction tank (2012) via a pipeline; The heat supply assembly (3) is also included. The heat supply assembly (3) includes a heat supply tank, a heat exchange outflow pipeline (303) and a first heat exchange inflow pipeline (302). The heat exchange outflow pipeline (303) is respectively connected to the heat extraction tank group (201) and the heat supply tank. The first heat exchange inflow pipeline (302) is respectively connected to the heat extraction tank group (201) and the heat supply tank.

2. The thermally regulated compressed air energy storage system according to claim 1, characterized in that: It also includes a third compressor (103), a third air outlet pipeline (106) and an air storage tank (4); the second compressor (102) and the third compressor (103) are connected via the second air outlet pipeline (105); and the third compressor (103) and the air storage tank (4) are connected via the third air outlet pipeline (106).

3. The thermally regulated compressed air energy storage system according to claim 2, characterized in that: The heat extraction component (2) comprises a heat extraction outflow main pipe (202), a first heat extraction outflow branch pipe (211), a second heat extraction outflow branch pipe (212), a first heat extraction inflow branch pipe (207), and a second heat extraction inflow branch pipe (208); the heat extraction outflow main pipe (202) is provided with a first power circulation pump (203); one end of the heat extraction outflow main pipe (202) is connected to the heat extraction tank group (201); the other end of the heat extraction outflow main pipe (202) is respectively connected to the first heat extraction outflow branch pipe (211), the second heat extraction outflow branch pipe (212), and the first power circulation pump (203); 2), the first heat extraction outflow branch pipe (211) is connected to the first heat exchanger (204), the first heat extraction inflow branch pipe (207) is respectively connected to the first heat exchanger (204) and the first heat extraction tank (2011), the second heat extraction outflow branch pipe (212) is connected to the second heat exchanger (205), the second heat extraction inflow branch pipe (208) is respectively connected to the second heat exchanger (205) and the second heat extraction tank (2012), and the first heat extraction inflow branch pipe (207) is connected to the second heat extraction inflow branch pipe (208).

4. The thermally regulated compressed air energy storage system according to claim 3, characterized in that: The heat extraction component (2) further comprises a third heat exchanger (206), a third heat extraction tank (2013), a third heat extraction outflow branch pipe (213) and a third heat extraction inflow branch pipe (209); the third air outlet pipe (106) is arranged to pass through the third heat exchanger (206); the third heat extraction outflow branch pipe (213) is respectively connected to the heat extraction outflow main pipe (202) and the third heat exchanger (206); and the third heat extraction inflow branch pipe (209) is respectively connected to the third heat exchanger (206) and the third heat extraction tank (2013).

5. The thermally regulated compressed air energy storage system according to claim 1, characterized in that: The heat supply component (3) further includes a first heat exchange outflow branch pipe (304), a second heat exchange outflow branch pipe (305) and a second heat exchange inflow pipe (307), wherein the first heat exchange outflow branch pipe (304) is respectively connected to the heat exchange outflow pipe (303) and the first heat exchanger (204), the second heat exchange outflow branch pipe (305) is respectively connected to the first heat exchange outflow branch pipe (304) and the second heat exchanger (205), the second heat exchange inflow pipe (307) is respectively connected to the first heat exchanger (204) and the second heat exchanger (205), and the second heat exchange inflow pipe (307) is connected to the heat supply tank.

6. The thermally regulated compressed air energy storage system according to claim 5, characterized in that: The heat supply component (3) further comprises an external heat source tank (312), a heat inflow pipeline (314) and a heat outflow pipeline (313); the heat inflow pipeline (314) is respectively connected to the heat supply tank and the external heat source tank (312); and the heat outflow pipeline (313) is respectively connected to the heat exchange outflow pipeline (303) and the external heat source tank (312).

7. The thermally regulated compressed air energy storage system according to any one of claims 5 to 6, characterized in that: The invention also includes a power generation assembly (5), wherein the power generation assembly (5) includes a first expander (501), a second expander (502), a first air intake pipeline (504), and a second air intake pipeline (505), wherein the first expander (501) and the gas storage tank (4) are connected via the first air intake pipeline (504), and the first expander (501) and the second expander (502) are connected via the second air intake pipeline (505).

8. The thermally regulated compressed air energy storage system according to claim 7, characterized in that: The heating assembly (3) further comprises a heat outflow main pipe (320), a first heat outflow branch pipe (321), a second heat outflow branch pipe (322), a fourth heat exchanger (317), a fifth heat exchanger (318) and a heat inflow pipe (326). The heat outflow main pipe (320) is provided with a second power circulation pump (325). One end of the heat outflow main pipe (320) is in communication with the heating tank, and the other end of the heat outflow main pipe (320) is in communication with the first heat outflow branch pipe (321) and the second heat outflow branch pipe (322). The first air inlet pipe (5 04) is arranged through the fourth heat exchanger (317), the first heat supply outflow branch pipe (321) is respectively connected to the heat supply outflow main pipe (320) and the fourth heat exchanger (317), the second air inlet pipe (505) is arranged through the fifth heat exchanger (318), the second heat supply outflow branch pipe (322) is respectively connected to the heat supply outflow main pipe (320) and the fifth heat exchanger (318), one end of the heat supply inflow pipe (326) is respectively connected to the fourth heat exchanger (317) and the fifth heat exchanger (318), and the other end of the heat supply inflow pipe (326) is connected to the heat supply tank.

9. The thermally regulated compressed air energy storage system according to claim 8, characterized in that: The heat supply assembly (3) further comprises an external heat outflow main pipe (327), a first external heat outflow branch pipe (328), a second external heat outflow branch pipe (329) and an external heat inflow pipeline (336), wherein the external heat outflow main pipe (327) is provided with a third power circulation pump (332), one end of the external heat outflow main pipe (327) is communicated with the external heat source tank (312), and the other end of the external heat outflow main pipe (327) is respectively connected to the first external heat outflow branch pipe (328), the second external heat outflow branch pipe ( 329), the first external heat outflow branch pipe (328) is respectively connected to the external heat outflow main pipe (327) and the fourth heat exchanger (317), the second external heat outflow branch pipe (329) is respectively connected to the external heat outflow main pipe (327) and the fifth heat exchanger (318), one end of the external heat inflow pipeline (336) is respectively connected to the fourth heat exchanger (317) and the fifth heat exchanger (318), and the other end of the external heat inflow pipeline (336) is connected to the external heat source tank (312).

10. A control method for a thermally regulated compressed air energy storage system, for controlling the thermally regulated compressed air energy storage system according to claim 1, characterized in that: In the energy storage state, the first compressor (101) and the second compressor (102) are in an operating state. The gas compressed by the first compressor (101) enters the first gas outlet pipeline (104) and exchanges heat with the first heat exchanger (204), so that the heat exchange medium after heat exchange is stored in the first heat extraction tank (2011); the gas compressed by the second compressor (102) enters the second gas outlet pipeline (105) and exchanges heat with the second heat exchanger (205), so that the heat exchange medium after heat exchange is stored in the second heat extraction tank (2012). The temperature of the heat exchange medium in the first heat extraction tank (2011) is different from the temperature of the heat exchange medium in the second heat extraction tank (2012).

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