Power generation system

Abstract

The invention provides a power generation system which comprises a heat storage system, a power generation system and a power generation system. A compressor module for compressing a second medium; the output end of the compressor module is connected with the second medium input end of the first heat exchange system, so that a second medium output from the output end of the compressor module exchanges heat with the first medium in the heat storage system in the first heat exchange system; a second medium output end of the first heat exchange system is connected with an input end of the expansion machine system; a power generation expansion machine module of the expansion machine system is in mechanical transmission connection with the first power generator, and a driving expansion machine module of the expansion machine system is in mechanical transmission connection with the compressor module; and the starting device is used for starting the power generation system, and the problem that the arrangement mode of the Brayton cycle system in the prior art cannot simultaneously achieve the effects of driving the compressor to rotate and guaranteeing the optimal rotating speed of the expansion machine is solved.

Description

Technical Field

[0001] This application relates to the field of power generation technology, and more specifically, to a power generation system. Background Technology

[0002] Currently, thermal energy storage systems primarily achieve thermoelectric conversion through turbine work, mainly including Rankine cycle systems using water as the working fluid and Brayton cycle systems using gas as the working fluid. Brayton cycle systems are mainly used in gas turbines, supercritical carbon dioxide cycles, and high-temperature cooling in nuclear power plants, and their layouts are typically divided into coaxial integrated layouts, split shaft layouts, and impeller symmetrical stress-counteracting layouts.

[0003] The coaxial integrated layout rigidly connects the compressor and expander on the same axis and shares bearing support. This design can achieve rapid load adjustment, but it is more difficult to maintain and the balance of axial force is highly dependent on the bearing.

[0004] The split-shaft power distribution mechanism allows each piece of equipment to operate flexibly at independent speeds through pneumatic coupling and without mechanical connection.

[0005] Symmetrical impeller arrangement reduces the reliance on bearings for axial force self-balancing, but symmetrical layout requires high machining accuracy and is only suitable for small and medium power units. Large power units also need to be equipped with other balancing measures.

[0006] Therefore, none of the three arrangement methods mentioned above can simultaneously achieve the optimal effect of driving the compressor to rotate and ensuring the expander speed. Summary of the Invention

[0007] The main objective of this application is to provide a power generation system that solves the problem that the arrangement of the Brayton cycle system in the prior art cannot simultaneously achieve the optimal effect of driving the compressor to rotate and ensuring the expander speed.

[0008] To achieve the above objectives, this application provides a power generation system, comprising: a thermal storage system having a first medium; a compressor module configured to compress a second medium; a first heat exchange system, the output end of the compressor module being connected to the input end of the second medium of the first heat exchange system, so that the second medium output from the output end of the compressor module exchanges heat with the first medium in the thermal storage system in the first heat exchange system, thereby transferring the thermal energy stored in the thermal storage system to the second medium in the first heat exchange system; an expander system and a first generator, the output end of the second medium of the first heat exchange system being connected to the input end of the expander system; wherein the expander system includes a power generation expander module and a drive expander module, the power generation expander module being mechanically driven to the first generator, and the drive expander module being mechanically driven to the compressor module; and a starting device for starting the power generation system during the start-up phase of the power generation system.

[0009] Furthermore, it also includes: a second heat exchange system for receiving the second medium output from the output end of the expander system and using the second medium to heat the third medium; wherein the output end of the second medium of the second heat exchange system is connected to the input end of the compressor module; a waste heat utilization system having the third medium; the output end of the third medium of the waste heat utilization system is connected to the input end of the third medium of the second heat exchange system, and the input end of the third medium of the waste heat utilization system is connected to the output end of the third medium of the second heat exchange system; wherein the input end of the second medium of the second heat exchange system is connected to the output end of the expander system, and the second medium and the third medium exchange heat in the second heat exchange system to transfer the heat energy in the second medium to the third medium.

[0010] Furthermore, the second medium output end of the first heat exchange system is connected to the input end of the power generation expander module; the output end of the power generation expander module is connected to the input end of the drive expander module, and the output end of the drive expander module is connected to the second medium input end of the second heat exchange system.

[0011] Furthermore, the second medium output end of the first heat exchange system is connected to the input end of the generator expander module through pipe number one, and the second medium output end of the first heat exchange system is connected to the input end of the drive expander module through pipe number two; the output end of the generator expander module is connected to the second medium input end of the second heat exchange system, and the output end of the drive expander module is connected to the second medium input end of the second heat exchange system.

[0012] Furthermore, the first heat exchange system includes N first heat exchange modules, and the power generation expander module includes N power generation expander units mechanically connected to each other. The N first heat exchange modules and N power generation expander units are arranged in a one-to-one correspondence, where N is greater than or equal to 2. Each first heat exchange module has a first medium input end, a first medium output end, a second medium input end, and a second medium output end. In each first heat exchange module, the path through which the first medium flows from the first medium input end to the first medium output end is the first medium flow path of the first heat exchange module, and the path through which the second medium flows from the second medium input end to the second medium output end is the second medium flow path of the first heat exchange module. All the first medium flow paths of the first heat exchange modules are connected in series. In each first heat exchange module, the first medium input end of any one first heat exchange module is connected to the first medium output end of an adjacent first heat exchange module on one side, and the first medium output end of that first heat exchange module is connected to the first medium input end of an adjacent first heat exchange module on the other side. Each generator expander unit has an input end and an output end. In each generator expander unit, the path through which the second medium flows from the input end to the output end of the generator expander unit is the second medium flow path of the generator expander unit. Along the flow direction of the second medium, all the second medium flow paths of the first heat exchange modules and all the second medium flow paths of the generator expander units are connected in series. Furthermore, a second medium flow path of the generator expander unit is connected in series between any two adjacent second medium flow paths of the first heat exchange modules. Along the flow direction of the second medium, the upstream first heat exchange module is the No. 1 first heat exchange module, the upstream generator expander unit is the first-stage generator expander unit, and the downstream generator expander unit is the final-stage generator expander unit. The second medium input end of the No. 1 first heat exchange module is connected to the output end of the compressor module, the second medium output end of the No. 1 first heat exchange module is connected to the input end of the first-stage generator expander unit, and the output end of the final-stage generator expander unit is connected to the input end of the drive expander module.

[0013] Furthermore, the third medium includes water; the second heat exchange system is a steam generation system, which receives the second medium output from the output end of the self-expander system and uses the second medium to heat the water working fluid to generate high-temperature and high-pressure steam; the waste heat utilization system includes a steam turbine unit and a second generator, the steam turbine unit is configured to use the high-temperature and high-pressure steam from the steam generation system to generate driving force to drive the second generator to generate electricity; wherein, when the generator expander module and the steam turbine unit are mechanically connected, the first generator and the second generator are the same generator; or, when the generator expander module and the steam turbine unit are independent of each other, the first generator and the second generator are two independent generators.

[0014] Furthermore, the power generation system also includes a cooler for cooling the second medium after it has released heat at the second heat exchange system; the input end of the cooler is connected to the output end of the second medium of the second heat exchange system, and the output end of the cooler is connected to the input end of the compressor module.

[0015] Furthermore, the power generation system also includes: a gas storage and processing component, the input end of which is connected to the output end of the cooler, and the output end of which is connected to the input end of the compressor module. The gas storage and processing component is used to store or process the second medium and deliver it to the compressor module.

[0016] Furthermore, the thermal storage system includes a solid thermal storage module, a medium transport module, and an energy charging module. The solid thermal storage module has a first solid thermal storage module input end and a first solid thermal storage module output end. The medium transport module is used to output a first medium, and the energy charging module is used to heat the first medium output from the medium transport module. The thermal storage system has a heat charging mode and a heat dissipation mode. In the heat charging mode, the output end of the medium transport module is connected to the input end of the energy charging module, the output end of the energy charging module is connected to the input end of the first solid thermal storage module, and the output end of the first solid thermal storage module is connected to the atmospheric environment or to the input end of the medium transport module. In the heat dissipation mode, the output end of the medium transport module is connected to the input end of the first solid thermal storage module, the output end of the first solid thermal storage module is connected to the first medium input end of the first heat exchange system, and the first medium output end of the first heat exchange system is connected to the atmospheric environment or to the input end of the medium transport module.

[0017] Furthermore, the thermal storage system includes a first pipe, a second pipe, a third pipe, and a fourth pipe. The two ends of the first pipe are connected to the output end of the medium delivery module and the input end of the charging module, respectively. The two ends of the second pipe are connected to the output end of the charging module and the input end of the first solid thermal storage module, respectively. The two ends of the third pipe are connected to the output end of the first solid thermal storage module and the first medium input end of the first heat exchange system, respectively. The two ends of the fourth pipe are connected to the first medium output end of the first heat exchange system and the input end of the medium delivery module, respectively. In the heat charging mode, the charging module operates, and the first heat exchange system stops operating. In the heat dissipation mode, the charging module stops operating, and the first heat exchange system operates.

[0018] Furthermore, the thermal storage system also includes: a first valve assembly and a second valve assembly, the first valve assembly being disposed on a first pipe and the second valve assembly being disposed on a second pipe; a third valve assembly being disposed on a third pipe; and / or, a fourth valve assembly being disposed on a third pipe; wherein, when both the third valve assembly and the fourth valve assembly are disposed on the third pipe, along the flow direction of the first medium, the third valve assembly is located on the side of the fourth valve assembly closer to the solid thermal storage module.

[0019] Further, the first medium includes at least one of air and carbon dioxide; and / or, the second medium includes at least one of air, carbon dioxide, nitrogen, helium and argon.

[0020] Furthermore, the power generation system also includes: a reheat system coupled to the power generation expander module; and / or, an intercooling system coupled to the compressor module.

[0021] Furthermore, the heat energy in the charging module comes from at least one of the following: solar energy absorbed by the concentrating solar collector system, heat energy generated by electric heating of abandoned electricity from the wind power generation system, heat energy generated by electric heating of abandoned electricity from the photovoltaic power generation system, heat energy generated by electric heating of off-peak electricity from the power grid, heat energy generated by high-temperature flue gas, excess heat energy in coal-fired boilers, heat energy in waste heat boilers, and industrial waste heat.

[0022] Furthermore, the starting device includes at least one of a first starting device, a second starting device, and a third starting device; wherein, the first starting device includes a prime mover, which is mechanically connected to the compressor module during the starting phase, the prime mover is configured to drive the compressor module to operate during the starting phase, and the prime mover and the compressor module are configured to switch between two states: disengaging the mechanical transmission connection and re-establishing the mechanical transmission connection; the second starting device includes a first generator, which is mechanically connected to the compressor module during the starting phase, and the first generator is configured to use electrical energy to drive the compressor module to operate during the starting phase; the third starting device includes a high-temperature and high-pressure gas source, which is configured to drive the expander module to operate during the starting phase.

[0023] By applying the technical solution of this application, this application achieves a split-shaft arrangement of the first generator and compressor modules by mechanically connecting the generator expander module and the first generator, and by mechanically connecting the drive expander module and the compressor module, thereby enabling the first generator and compressor modules to reach their respective optimal operating power. Specifically, the thermal storage system is used to store thermal energy and provide thermal energy to the first medium, the compressor module is used to compress the second medium (the second medium should be a medium with compressibility and a large isentropic coefficient, such as at least one of CO2, N2, air, and helium) to compress the second medium to a high temperature and high pressure state, the first heat exchange system is used to realize the transfer of thermal energy from the first medium to the second medium, and the generator expander module and the first generator of the expander system are used to convert the thermal energy of the second medium into electrical energy, i.e., the first... A heat exchange system further heats the high-temperature, high-pressure second medium output from the compressor module. The high-temperature, high-pressure second medium, further heated in the first heat exchange system, flows out through the second medium output end of the first heat exchange system and enters the power generation expander module in the expander system to expand and do work, thereby driving the first generator to generate electricity. The drive expander module is used to drive the compressor module to operate. The starting device is used to ensure the smooth start-up of the power generation system. By adopting the power generation expander module and the drive expander module, the first generator and the compressor module are arranged in a split-shaft configuration, which solves the problem that the arrangement of the Brayton cycle system in the prior art cannot simultaneously achieve the optimal effect of driving the compressor to rotate and ensuring the expander speed. This ensures the effective storage and conversion of thermal energy, improves the power generation efficiency of the power generation system, and at the same time ensures the rapid start-up and stable operation of the power generation system. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0025] Figure 1 A schematic diagram of the power generation system in Embodiment 1 of this application is shown;

[0026] Figure 2 A schematic diagram of the power generation system in Embodiment 2 of this application is shown;

[0027] Figure 3 A schematic diagram of the power generation system in Embodiment 3 of this application is shown.

[0028] The above figures include the following reference numerals:

[0029] 1. Thermal storage system; 11. Solid thermal storage module; 12. Medium transport module; 13. Energy charging module; 14. First pipeline; 141. First valve assembly; 15. Second pipeline; 151. Second valve assembly; 16. Third pipeline; 161. Third valve assembly; 162. Fourth valve assembly; 17. Fourth pipeline;

[0030] 2. Main power generation system; 21. Power generation expander module; 2100. Power generation expander unit; 2101. First power generation expander unit; 2102. Second power generation expander unit; 22. First generator; 23. Drive expander module; 230. Drive expander; 24. Gas storage and processing component; 25. Compressor module; 250. Compressor; 251. Safety valve; 26. Cooler; 27. Fifth pipeline; 271. Fifth valve assembly; 28. Sixth pipeline; 29. ​​Seventh pipeline; 210. Eighth pipeline; 211. Ninth pipeline; 212. Tenth pipeline; 213. Eleventh pipeline; 214. First drive shaft; 215. Second drive shaft;

[0031] 3. Waste heat recovery system; 31. Steam turbine unit; 32. Second generator; 33. Twelfth pipeline; 34. Thirteenth pipeline; 35. Third drive shaft;

[0032] 4. First heat exchange system; 401. First heat exchange module; 41. First medium flow path of the first heat exchange module; 42. Second medium flow path of the first heat exchange module; 4011. First heat exchange module No. 1; 4012. First heat exchange module No. 2;

[0033] 5. Second heat exchange system; 50. Second heat exchange module; 51. Second medium flow path of the second heat exchange module; 52. Third medium flow path of the second heat exchange module. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] like Figures 1 to 3As shown, this application provides a power generation system, including: a thermal storage system 1 containing a first medium; a compressor module 25 configured to compress a second medium; a first heat exchange system 4, the output end of the compressor module 25 being connected to the input end of the second medium of the first heat exchange system 4, so that the second medium output from the output end of the compressor module 25 exchanges heat with the first medium in the thermal storage system 1 in the first heat exchange system 4, thereby transferring the thermal energy stored in the thermal storage system 1 to the second medium in the first heat exchange system 4; an expander system and a first generator 22, the output end of the second medium of the first heat exchange system 4 being connected to the input end of the expander system; wherein, the expander system includes a power generation expander module 21 and a drive expander module 23, the power generation expander module 21 being mechanically connected to the first generator 22, and the drive expander module 23 being mechanically connected to the compressor module 25; and a starting device for starting the power generation system during the start-up phase.

[0036] In the power generation system of this application, the thermal storage system 1 is used to store thermal energy and provide thermal energy to the first medium. The compressor module 25 is used to compress the second medium (the second medium should be a medium with compressibility and a large isentropic coefficient, such as at least one of CO2, N2, air, and helium) to compress the second medium to a high temperature and high pressure state. The first heat exchange system 4 is used to realize the transfer of thermal energy from the first medium to the second medium. The power generation expander module 21 and the first generator 22 of the expander system are used to convert the thermal energy of the second medium into electrical energy. That is, the first heat exchange system 4 further heats up the high temperature and high pressure second medium output from the compressor module 25. The high temperature and high pressure second medium, which is further heated by the first heat exchange system 4, is then transferred to the first heat exchanger module 25. The second medium output terminal of the heat system 4 flows out and enters the power generation expander module 21 in the expander system to expand and do work, thereby driving the first generator 22 to generate electricity. The drive expander module 23 is used to drive the compressor module 25 to operate. The starting device is used to ensure the smooth start of the power generation system. By adopting the power generation expander module 21 and the drive expander module 23, the first generator 22 and the compressor module 25 are arranged in a split-shaft configuration, which solves the problem that the arrangement of the Brayton cycle system in the prior art cannot simultaneously achieve the optimal effect of driving the compressor to rotate and ensuring the expander speed. This ensures the effective storage and conversion of thermal energy, improves the power generation efficiency of the power generation system, and ensures the rapid start and stable operation of the power generation system.

[0037] It should be noted that in the power generation system of this application, the compressor module 25 does not refer to a single compressor 250, but can be a combination of multiple compressors 250. For example, multiple compressors 250 are mechanically connected in sequence and mechanically connected to the drive expander module 23. The second medium is compressed to a high temperature and high pressure state in the multiple compressors 250. Of course, in other embodiments of this solution, multiple compressors 250 are mechanically connected in sequence and mechanically connected to the drive expander module 23, but the second medium is compressed to a high temperature and high pressure state by all the compressors 250 in sequence. The specific implementation method is not limited in detail in this application, and can be designed according to the actual situation, as long as the compression is satisfied. The second medium compressed by the compressor module 25 is compressed to a high temperature and high pressure state; and the generator expander module 21 does not refer to a single generator expander, but can be a combination of multiple generator expanders. For example, multiple generator expanders are mechanically connected in sequence and mechanically connected to the first generator 22. The second medium enters multiple generator expanders in sequence to do work, or the second medium enters multiple generator expanders simultaneously to do work. This application does not impose any restrictions and can be designed according to actual conditions; the drive expander module 23 does not refer to a single drive expander 230, but can be a combination of multiple drive expanders 230. This application does not impose any restrictions on the drive expander module 23 and can be designed according to actual conditions.

[0038] like Figures 1 to 3 As shown, it also includes: a second heat exchange system 5, used to receive the second medium output from the output end of the expander system and use the second medium to heat the third medium; wherein, the second medium output end of the second heat exchange system 5 is connected to the input end of the compressor module 25; a waste heat utilization system 3, which contains the third medium; the third medium output end of the waste heat utilization system 3 is connected to the third medium input end of the second heat exchange system 5, and the third medium input end of the waste heat utilization system 3 is connected to the third medium output end of the second heat exchange system 5; wherein, the second medium input end of the second heat exchange system 5 is connected to the output end of the expander system, and the second medium and the third medium exchange heat in the second heat exchange system 5 to transfer the heat energy in the second medium to the third medium.

[0039] In the power generation system of this application, the second heat exchange system 5 and the waste heat utilization system 3 further utilize the waste heat of the second medium. After the second medium does work in the expander system, it exchanges heat with the third medium through the second heat exchange system 5, transferring the remaining heat energy to the third medium, thereby realizing the effective recovery of waste heat, improving the energy utilization efficiency of the power generation system, and reducing energy waste.

[0040] The second heat exchange system 5 includes a second heat exchange module 50, which includes a second medium flow path 51 and a third medium flow path 52 that can exchange heat with each other. The third medium input end and the third medium output end of the third medium flow path 52 are respectively connected to the output end and the input end of the turbine unit 31 for the third medium to flow through.

[0041] It should be noted that in the power generation system of this application, the second heat exchange module 50 does not refer to a single second heat exchanger, but can be a combination of multiple second heat exchangers. For example, the second medium flow paths of multiple second heat exchangers, i.e., the flow paths through which the second medium flows in the second heat exchangers, are connected in series. The second medium exchanges heat with the third medium in multiple second heat exchangers in sequence. Similarly, the third medium flow paths of multiple second heat exchangers, i.e., the flow paths through which the third medium flows in the second heat exchangers, can be connected in series. The third medium exchanges heat with the second medium in multiple second heat exchangers in sequence. In other embodiments of this technical solution, the second medium can also be divided into multiple flow paths and simultaneously enter multiple second heat exchangers to exchange heat with the third medium, and the third medium can also be divided into multiple flow paths and simultaneously enter multiple second heat exchangers to exchange heat with the second medium. This application does not impose specific limitations on this, and specific designs can be made according to actual conditions. The second heat exchange system 5 only needs to be able to transfer the heat energy in the second medium to the third medium.

[0042] In such Figure 1 In the embodiment shown, the second medium output end of the first heat exchange system 4 is connected to the input end of the power generation expander module 21; the output end of the power generation expander module 21 is connected to the input end of the drive expander module 23, and the output end of the drive expander module 23 is connected to the second medium input end of the second heat exchange system 5.

[0043] In such Figure 1 In the power generation system shown, the power generation expander module 21 and the drive expander module 23 are arranged in series to achieve continuous work by the second medium. The second medium first performs work in the power generation expander module 21, then enters the drive expander module 23 for further work, and finally enters the second heat exchange system 5 to release waste heat. This improves the work efficiency of the second medium and ensures maximum utilization of the thermal energy of the power generation system. Preferably, the power generation expander module 21 is a power generation expander unit 2100, the drive expander module 23 is a drive expander 230, and the first heat exchange system 4 is a first heat exchange module 401.

[0044] In such Figure 2 In the embodiment shown, this embodiment focuses on... Figure 1The connection relationships between the first heat exchange system 4, the expander system, and the second heat exchange system 5 have been adjusted. The second medium output end of the first heat exchange system 4 is connected to the input end of the generator expander module 21 through pipe No. 1, and the second medium output end of the first heat exchange system 4 is connected to the input end of the drive expander module 23 through pipe No. 2. The output end of the generator expander module 21 is connected to the second medium input end of the second heat exchange system 5, and the output end of the drive expander module 23 is connected to the second medium input end of the second heat exchange system 5.

[0045] In such Figure 2 In the power generation system shown, pipes one and two ensure the smooth flow of the second medium within the system. Pipes one and two respectively transport the second medium from the first heat exchange system 4 to the power generation expander module 21 and the drive expander module 23, achieving efficient utilization of the thermal energy of the second medium, improving the stability and efficiency of the power generation system, and ensuring the synchronous and efficient operation of the drive compressor module 25 and the power generation of the first generator 22. Preferably, the drive expander module 23 is a drive expander 230, the first heat exchange system 4 is a first heat exchange module 401, and the power generation expander module 21 is a power generation expander unit 2100.

[0046] In such Figure 3 In the embodiment shown, this embodiment focuses on... Figure 1The number of first heat exchange modules 401 in the first heat exchange system 4 and the number of power generation expander units 2100 in the expander system, as well as the connection relationship between the first heat exchange system 4 and the expander system, have been adjusted. The first heat exchange system 4 includes N first heat exchange modules 401, and the power generation expander module 21 includes N power generation expander units 2100 that are mechanically connected to each other. Furthermore, the N first heat exchange modules 401 and the N power generation expander units 2100 are arranged in a one-to-one correspondence, where N is greater than or equal to 2. Each first heat exchange module 401 has a first medium input terminal, a first medium output terminal, a second medium input terminal, and... Second medium output terminal; in each first heat exchange module 401, the path through which the first medium flows from the first medium input terminal to the first medium output terminal is the first medium flow path 41 of the first heat exchange module, and the path through which the second medium flows from the second medium input terminal to the second medium output terminal is the second medium flow path 42 of the first heat exchange module; all the first medium flow paths 41 of the first heat exchange modules are connected in series, and in each first heat exchange module 401, the first medium input terminal of any one of the first heat exchange modules 401 is connected to the first medium output terminal of the adjacent first heat exchange module 401 on one side, and the first medium output terminal of the first heat exchange module 401... The medium output end is connected to the first medium input end of the adjacent first heat exchange module 401 on the other side; each generator expander unit 2100 has an input end and an output end; in each generator expander unit 2100, the path through which the second medium flows from the input end of the generator expander unit 2100 to the output end of the generator expander unit 2100 is the second medium flow path of the generator expander unit; along the flow direction of the second medium, all the second medium flow paths 42 of the first heat exchange modules and all the second medium flow paths of the generator expander units are connected in series in sequence, and a second medium flow path is connected in series between any two adjacent second medium flow paths 42 of the first heat exchange modules. The second medium flow path of the generator expander unit: along the flow direction of the second medium, the first heat exchange module 401 located at the uppermost end is the first heat exchange module 4011, the generator expander unit 2100 located at the uppermost end is the first stage generator expander unit, and the generator expander unit 2100 located at the lowermost end is the final stage generator expander unit. The second medium input end of the first heat exchange module 4011 is connected to the output end of the compressor module 25, the second medium output end of the first heat exchange module 4011 is connected to the input end of the first stage generator expander unit, and the output end of the final stage generator expander unit is connected to the input end of the drive expander module 23.

[0047] In such Figure 3In the power generation system shown, the arrangement of N first heat exchange modules 401 and N power generation expander units 2100 ensures the segmented utilization and conversion of thermal energy. The first medium and the second medium exchange heat in each first heat exchange module 401, and the second medium does work in each power generation expander unit 2100, realizing the continuous conversion of thermal energy, improving the thermal energy utilization efficiency, and ensuring the operational stability and flexibility of the power generation system.

[0048] The thermal energy conversion problem of power generation systems under different scales or different needs can be solved by adjusting the value of N or the connection method between N first heat exchange modules 401 and N power generation expander units 2100.

[0049] It should be specifically noted that in the power generation system of this application, the first heat exchange module 401 does not refer to a single first heat exchanger, but can be a combination of multiple first heat exchangers; similarly, the power generation expander unit 2100 does not refer to a single power generation expander, but can be a combination of multiple power generation expanders. This application does not impose restrictions on the number and connection method of the first heat exchangers in the first heat exchange module 401, which can be designed according to actual conditions. Similarly, it does not impose restrictions on the number and connection method of the power generation expanders in the power generation expander unit 2100, which can be designed according to actual conditions. Preferably, the first heat exchange module 401 is a single first heat exchanger, and the power generation expander unit 2100 is a single power generation expander.

[0050] In such Figure 3In the power generation system shown, the first heat exchange system 4 includes a first heat exchange module 4011 and a second heat exchange module 4012, and the power generation expander module 21 includes a first power generation expander unit 2101 and a second power generation expander unit 2102. The first medium input terminal of the second heat exchange module 4012 is connected to the first medium output terminal of the thermal storage system 1, and the first medium output terminal of the second heat exchange module 4012 is connected to the first medium input terminal of the first heat exchange module 4011. The first medium output terminal of the first heat exchange module 4011 is connected to the first medium input terminal of the thermal storage system 1. The first power generation expander unit 2101 and the second power generation expander unit 2102 are mechanically connected. The compressor unit 2102 is mechanically connected to the first generator 22; the output end of the compressor module 25 is connected to the second medium input end of the first heat exchange module 4011, the second medium output end of the first heat exchange module 4011 is connected to the input end of the first generator expander unit 2101, the output end of the first generator expander unit 2101 is connected to the second medium input end of the second heat exchange module 4012, the second medium output end of the second heat exchange module 4012 is connected to the input end of the second generator expander unit 2102; the output end of the second generator expander unit 2102 is connected to the input end of the drive expander 230, and the output end of the drive expander 230 is connected to the second medium input end of the second heat exchange system 5.

[0051] like Figures 1 to 3 As shown, the third medium includes water; the second heat exchange system 5 is a steam generation system, which receives the second medium output from the output end of the expander system and uses the second medium to heat the water working fluid to generate high-temperature and high-pressure steam; the waste heat utilization system 3 includes a turbine unit 31 and a second generator 32. The turbine unit 31 is configured to use the high-temperature and high-pressure steam from the steam generation system to generate driving force to drive the second generator 32 to generate electricity; wherein, when the generator expander module 21 and the turbine unit 31 are mechanically connected, the first generator 22 and the second generator 32 are the same generator; or, when the generator expander module 21 and the turbine unit 31 are independent of each other, the first generator 22 and the second generator 32 are two independent generators.

[0052] In the power generation system of this application, after the second medium does work in the expander system, it heats the third medium from the waste heat utilization system 3 through the steam generation system to generate high-temperature and high-pressure steam. At the same time, the steam turbine unit 31 uses the steam to drive the second generator 32 to generate electricity, converting the waste heat of the second medium into electrical energy, realizing the utilization of waste heat, improving the comprehensive utilization rate of energy in the power generation system, reducing energy waste, and ensuring the operating efficiency of the power generation system.

[0053] The first embodiment of the power generation system of this application (not shown) is for... Figures 1 to 3 The waste heat utilization system 3 shown has been modified. In this embodiment, the waste heat utilization system 3 includes: a waste heat boiler, wherein the third medium input end and the third medium output end of the third medium flow path of the second heat exchange module are respectively connected to the output end and the input end of the waste heat boiler for supplying the third medium to flow through, so that the third medium exchanges heat with the second medium to generate high-temperature and high-pressure steam, and then heats the waste heat boiler with the high-temperature and high-pressure steam; or, an urban heating heat exchange station, wherein the third medium input end and the third medium output end of the third medium flow path of the second heat exchange module are respectively connected to the output end and the input end of the third medium flow path of the second heat exchange module. The third medium is connected to the output and input ends of the urban heating heat exchange station, respectively, to allow the third medium to flow through, so that the third medium exchanges heat with the second medium to generate high-temperature and high-pressure steam, and the urban heating heat exchange station is heated by the high-temperature and high-pressure steam; or, the third medium input end and the third medium output end of the third medium flow path of the second heat exchange module of the regenerator are connected to the output and input ends of the regenerator, respectively, to allow the third medium to flow through, so that the third medium exchanges heat with the second medium to generate high-temperature and high-pressure steam, and the regenerator is heated by the high-temperature and high-pressure steam.

[0054] like Figures 1 to 3 As shown, the power generation system also includes a cooler 26 for cooling the second medium after it has released heat at the second heat exchange system 5; the input end of the cooler 26 is connected to the output end of the second medium of the second heat exchange system 5, and the output end of the cooler 26 is connected to the input end of the compressor module 25.

[0055] In the power generation system of this application, the cooler 26 ensures temperature control of the second medium, providing conditions for the stable operation of the compressor module 25. In principle, after the second medium releases waste heat in the second heat exchange system 5, it enters the cooler 26 for cooling. The cooled second medium can then re-enter the compressor module 25 for reuse, improving the stability of the power generation system and the recycling rate of the second medium.

[0056] like Figures 1 to 3 As shown, the power generation system also includes a gas storage and processing component 24, the input end of which is connected to the output end of the cooler 26, and the output end of which is connected to the input end of the compressor module 25. The gas storage and processing component 24 is used to store or process the second medium and deliver it to the compressor module 25.

[0057] In the power generation system of this application, the gas storage and processing component 24 greatly improves the operational stability of the power generation system. Through the buffering function of the gas storage and processing component 24, the power generation system can cope with fluctuations in the supply of the second medium, ensuring that the compressor module 25 can obtain sufficient second medium at any time, avoiding instability in the operation of the power generation system caused by insufficient supply of the second medium, and improving the reliability of the entire power generation system. At the same time, the buffering function of the gas storage and processing component 24 can also buffer the airflow and reduce airflow pulsation.

[0058] like Figures 1 to 3 As shown, the main power generation system 2 includes a safety valve 251, which is installed on the gas storage and processing component 24.

[0059] like Figures 1 to 3 As shown, the thermal storage system 1 includes a solid thermal storage module 11, a medium conveying module 12, and an energy charging module 13. The solid thermal storage module 11 has a first solid thermal storage module input end and a first solid thermal storage module output end. The medium conveying module 12 is used to output a first medium, and the energy charging module 13 is used to heat the first medium output from the medium conveying module 12. The thermal storage system 1 has a heat charging mode and a heat dissipation mode. In the heat charging mode, the output end of the medium conveying module 12 is connected to the input end of the energy charging module 13, the output end of the energy charging module 13 is connected to the input end of the first solid thermal storage module, and the output end of the first solid thermal storage module is connected to the atmospheric environment or to the input end of the medium conveying module 12. In the heat dissipation mode, the output end of the medium conveying module 12 is connected to the input end of the first solid thermal storage module, the output end of the first solid thermal storage module is connected to the first medium input end of the first heat exchange system 4, and the first medium output end of the first heat exchange system 4 is connected to the atmospheric environment or to the input end of the medium conveying module 12.

[0060] Furthermore, such as Figures 1 to 3As shown, in this embodiment, the thermal storage system 1 includes a medium delivery module 12, a charging module 13, and a solid thermal storage module 11. The medium delivery module 12 is used to output a first medium, and the charging module 13 is used to heat the first medium output from the medium delivery module 12. The solid thermal storage module 11 has a first solid thermal storage module input terminal and a first solid thermal storage module output terminal. The thermal energy in the charging module 13 comes from at least one of the following: solar energy absorbed by a concentrating solar collector system, such as a concentrating solar collector system in a tower solar thermal utilization system, a concentrating solar collector system in a trough solar thermal utilization system, a concentrating solar collector system in a Fresnel solar thermal utilization system, or a concentrating solar collector system in a dish solar thermal utilization system; thermal energy generated by electric heating of waste electricity from a wind power generation system; thermal energy generated by electric heating of waste electricity from a photovoltaic power generation system; thermal energy generated by electric heating of off-peak electricity from the power grid; excess thermal energy in a coal-fired boiler; thermal energy in a waste heat boiler; and industrial waste heat. When the heat energy in the charging module 13 comes from the waste heat energy generated by electric heating of waste electricity from wind power generation systems or photovoltaic power generation systems, the original source of energy is solar or wind energy, which are both clean energy sources and therefore environmentally friendly. When the heat energy in the charging module 13 comes from the waste heat energy generated by electric heating of waste electricity from wind power generation systems, or the waste heat energy generated by electric heating of waste electricity from photovoltaic power generation systems, or the heat energy generated by electric heating of off-peak electricity from the power grid, the source of energy comes from electricity that the power grid cannot absorb or low-cost electricity. By using the thermal storage system 1 to store this electricity, the peak shifting and valley filling effect in the power system can be promoted. When the heat energy in the charging module 13 comes from the excess heat energy in coal-fired boilers, or the heat energy in waste heat boilers, or industrial waste heat, since this heat energy cannot be effectively utilized when it is generated, this application uses the thermal storage system 1 to store this heat energy that could not be effectively utilized, and releases the stored heat energy when needed, which can improve the comprehensive utilization rate of energy. Furthermore, this embodiment employs a solid thermal energy storage module 11 to store thermal energy. Since the solid thermal energy storage module 11 has a stronger thermal storage capacity and storage temperature compared to traditional liquid media such as molten salt, it can utilize the thermal energy stored in the solid thermal energy storage module 11 to heat the second medium to a higher temperature during the heat release phase, thereby further improving the power generation efficiency of the power generation system. In the power generation system of this application, the thermal energy sources of the charging module 13 are diversified, providing multiple thermal energy supply methods for the power generation system, meeting the needs of different scenarios and operating conditions, and improving the stability of the thermal energy supply and energy utilization efficiency of the power generation system.

[0061] In the power generation system of this application, the heat storage system 1 achieves the storage and release of thermal energy through the heat charging mode and the heat release mode. The first medium in the medium transport module 12 is heated by the solid heat storage module 11 and then the heat energy is transferred to the second medium through the first heat exchange system 4, which provides a stable supply of thermal energy for the power generation system, improves the storage and utilization efficiency of thermal energy, and ensures the stable operation of the power generation system.

[0062] Specifically, such as Figures 1 to 3 As shown, when the thermal storage system 1 is in the charging mode, the first medium should be a medium with high density and good heat exchange performance, specifically selected from at least one of carbon dioxide and air. It is output from the output end of the medium conveying module 12 and input into the charging module 13. The charging module 13 heats the first medium to a high temperature. The heated first medium then enters the solid thermal storage module 11 through the input end of the first solid thermal storage module to release heat and store the thermal energy in the solid thermal storage module 11. After charging is complete, the first medium is discharged from the output end of the first solid thermal storage module, either directly into the atmosphere or back to the input end of the medium conveying module 12. When the first medium output from the first solid thermal storage module is returned to the medium conveying module 12, the first medium can be recycled. In this mode, the thermal storage system 1 can effectively utilize low-cost or clean heat sources such as abandoned electricity, off-peak electricity, boiler waste heat, and industrial waste heat, improving the system's energy efficiency and achieving low-cost energy storage, providing a stable and reliable heat source for the power generation system.

[0063] When the thermal storage system 1 is in heat release mode, the low-temperature first medium output from the medium delivery module 12 enters the solid thermal storage module 11 from the input end of the first solid thermal storage module. After absorbing the heat energy stored in the solid thermal storage module 11, it is converted into a high-temperature first medium. The high-temperature first medium output from the solid thermal storage module 11 flows from the first medium input end of the first heat exchange system 4 into the first heat exchange system 4. After the first medium completes heat exchange in the first heat exchange system 4, it is discharged from the first medium output end of the first heat exchange system 4. It can also be either discharged into the atmosphere or recycled back to the input end of the medium delivery module 12. When the first medium output from the first solid thermal storage module is transported back to the medium delivery module 12, the first medium can be recycled, forming a closed loop. The thermal storage system 1 can stably and continuously provide heat energy, supporting the high-efficiency operation of the power generation system. At the same time, the closed loop reduces the waste of the first medium itself and the heat energy in the first medium, enhancing the economy and environmental protection of the power generation system.

[0064] like Figures 1 to 3As shown, the thermal storage system 1 can switch between charging and releasing modes according to the needs of the power generation system, ensuring the efficient and stable operation of the power generation system under various operating conditions. At the same time, it improves the energy conversion efficiency and operating economy of the entire power generation system.

[0065] In addition, in the heat release mode, the direct connection between the thermal storage system 1 and the first heat exchange system 4 simplifies the energy transfer path, reduces energy loss during transmission, and further improves the power generation efficiency and thermal energy utilization efficiency of the power generation system, reflecting the innovation and advancement of the power generation system design.

[0066] like Figures 1 to 3 As shown, the thermal storage system 1 includes a first pipe 14, a second pipe 15, a third pipe 16, and a fourth pipe 17. The two ends of the first pipe 14 are connected to the output end of the medium conveying module 12 and the input end of the charging module 13, respectively. The two ends of the second pipe 15 are connected to the output end of the charging module 13 and the input end of the first solid thermal storage module, respectively. The two ends of the third pipe 16 are connected to the output end of the first solid thermal storage module and the first medium input end of the first heat exchange system 4, respectively. The two ends of the fourth pipe 17 are connected to the first medium output end of the first heat exchange system 4 and the input end of the medium conveying module 12, respectively. In the heat charging mode, the charging module 13 operates, and the first heat exchange system 4 stops operating. In the heat dissipation mode, the charging module 13 stops operating, and the first heat exchange system 4 operates.

[0067] In the power generation system of this application, the smooth flow of the first medium in the thermal storage system 1 is ensured by the reasonable arrangement of the first pipe 14, the second pipe 15, the third pipe 16 and the fourth pipe 17, which provides conditions for switching between the heat charging mode and the heat dissipation mode, and improves the operating efficiency and thermal energy utilization efficiency of the thermal storage system 1.

[0068] like Figures 1 to 3 As shown, the thermal storage system 1 further includes: a first valve assembly 141 and a second valve assembly 151, the first valve assembly 141 being disposed on the first pipe 14 and the second valve assembly 151 being disposed on the second pipe 15; a third valve assembly 161 being disposed on the third pipe 16; and / or, a fourth valve assembly 162 being disposed on the third pipe 16; wherein, when both the third valve assembly 161 and the fourth valve assembly 162 are disposed on the third pipe 16, along the flow direction of the first medium, the third valve assembly 161 is located on the side of the fourth valve assembly 162 closer to the solid thermal storage module 11.

[0069] It should be noted that by controlling the first valve assembly 141, the first pipeline 14 can be shut off, connected, and its flow rate can be regulated; by controlling the second valve assembly 151, the second pipeline 15 can be shut off, connected, and its flow rate can be regulated; by controlling the third valve assembly 161 and / or the fourth valve assembly 162, the third pipeline 16 can be shut off, connected, and its flow rate can be regulated. Of course, the first valve assembly 141 can be a single valve or a valve group formed by multiple valves, the second valve assembly 151 can be a single valve or a valve group formed by multiple valves, the third valve assembly 161 can be a single valve or a valve group formed by multiple valves, and the fourth valve assembly 162 can be a single valve or a valve group formed by multiple valves.

[0070] It should be noted that in the heat release mode, the charging module 13 stops operating, that is, the charging module 13 does not heat the first medium. At this time, the charging module 13 serves as the transport channel for transporting the first medium from the medium transport module 12 to the solid thermal storage module 11.

[0071] In embodiments of this application, the first medium includes at least one of air and carbon dioxide; and / or, the second medium includes at least one of air, carbon dioxide, nitrogen, helium, and argon.

[0072] In the power generation system of this application, the selection of the first and second media provides a variety of working fluid options, meeting the needs of different scenarios and operating conditions, ensuring the stability and efficiency of the power generation system, and improving its adaptability. The flow process of the second media is a closed loop. Therefore, in the power generation system of this application, the same batch of the second media can be reused, reducing heat loss and pollutant emissions, thereby improving thermal efficiency. Furthermore, since the second media in the closed loop is recycled, second media with better compressibility, heat exchange, and expansion capabilities, such as air, CO2, N2, and helium, can be used. In addition, because a high-pressure state can be maintained in the closed loop, the density, thermal conductivity, and other physical properties of the second media are more conducive to energy transfer, and the system pressure loss is small, resulting in a higher overall thermoelectric conversion efficiency of the power generation system.

[0073] In embodiments not illustrated in this application, the power generation system further includes: a reheat system coupled to the power generation expander module 21; and / or, an intercooling system coupled to the compressor module 25.

[0074] In the power generation system of this application, the reheat system increases the temperature of the second medium in the power generation expander module 21 by heating the second medium, thereby improving the power generation efficiency; the intercooling system reduces the temperature of the second medium when it enters the compressor module 25 by cooling the second medium, thereby improving the compression efficiency; the setting of the reheat system and the intercooling system can provide the power generation system with heat recovery and intermediate cooling means, thereby improving the operating efficiency and stability of the power generation system.

[0075] A starting device is used to start the power generation system during the start-up phase. The starting device includes at least one of a first starting device, a second starting device, and a third starting device. The first starting device includes a prime mover, which is mechanically connected to the compressor module 25 during the start-up phase. The prime mover is configured to drive the compressor module 25 during the start-up phase, and the prime mover and the compressor module 25 are configured to switch between disengaging and re-engaging the mechanical transmission connection. The second starting device includes a first generator 22, which is mechanically connected to the compressor module 25 during the start-up phase. The first generator 22 is configured to use electrical energy to drive the compressor module 25 during the start-up phase. The third starting device includes a high-temperature and high-pressure gas source, which is configured to drive the expander module 23 during the start-up phase.

[0076] In the power generation system of this application, the first starting device includes a prime mover. During the starting phase, the prime mover is mechanically connected to the compressor module 25. The prime mover is configured to drive the compressor module 25 during the starting phase, and the prime mover and compressor module 25 are configured to switch between two states: disengaging the mechanical connection and re-establishing the mechanical connection. The prime mover can be a diesel engine, a gasoline engine, an electric motor, etc. During the starting phase of the power generation system, the prime mover drives the compressor module 25, causing the second medium to flow through the power generation system according to a preset flow path until all components in the power generation system reach a preset stable operating state. Then, the mechanical connection between the prime mover and compressor module 25 is disengaged, completing the start-up of the power generation system, and the power generation system enters the normal operation phase.

[0077] In the power generation system of this application, the second starting device includes a first generator 22. The first generator 22 is mechanically connected to the compressor module 25 during the starting phase. The first generator 22 is configured to use electrical energy to drive the compressor module 25 during the starting phase. During the starting phase of the power generation system, by supplying power to the first generator 22, the first generator 22 is used as a motor, thereby driving the compressor module 25 and the expander system to operate. This causes the second medium to flow in the power generation system according to a preset flow path until all components in the power generation system reach a stable operating state. Then, the power supply to the first generator 22 is stopped, and the first generator 22 switches from motor operating state to generator operating state, completing the start-up of the power generation system. The power generation system then enters the normal operation phase.

[0078] In the power generation system of this application, the third start-up device includes a high-temperature, high-pressure gas source, which is configured to drive the expansion module 23 during the start-up phase. During the start-up phase of the power generation system, the high-temperature, high-pressure gas source supplies high-temperature, high-pressure gas to the expansion module 23 to drive its operation, which in turn causes the expansion module 23 to drive the compressor module 25. This causes the second medium to flow through the power generation system according to a preset flow path until all components in the power generation system reach a preset stable operating state. At this point, the high-temperature, high-pressure gas source stops supplying high-temperature, high-pressure gas to the expansion module 23, completing the start-up of the power generation system, and the power generation system enters the normal operation phase.

[0079] Therefore, the first starting device drives the compressor module 25 to operate through the prime mover, the second starting device drives the compressor module 25 to operate through the first generator 22 using electrical energy, and the third starting device drives the expander 230 to operate through a high-temperature and high-pressure gas source. All of these can achieve rapid start-up of the power generation system. The diversified design of the starting devices provides multiple starting methods for the power generation system, meets the needs of different scenarios and operating conditions, and improves the starting efficiency and operational flexibility of the power generation system.

[0080] like Figures 1 to 3 As shown, the main power generation system 2 includes a fifth pipe 27, a sixth pipe 28, a seventh pipe 29, an eighth pipe 210, a ninth pipe 211, a tenth pipe 212, and an eleventh pipe 213. The two ends of the fifth pipe 27 are respectively connected to the second medium output end of the second medium flow path of the second heat exchange module and the input end of the cooler 26. A fifth valve assembly 271 is provided on the fifth pipe 27. The two ends of the sixth pipe 28 are respectively connected to the output end of the cooler 26 and the input end of the gas storage and processing component 24. The two ends of the seventh pipe 29 are respectively connected to the output end of the gas storage and processing component 24 and the input end of the compressor module 25.

[0081] like Figure 1As shown, the two ends of the eighth pipe 210 are connected to the output end of the compressor module 25 and the second medium input end of the first heat exchange system 4, respectively; the two ends of the ninth pipe 211 are connected to the second medium output end of the first heat exchange system 4 and the input end of the generator expander module 21, respectively; the two ends of the tenth pipe 212 are connected to the output end of the generator expander module 21 and the input end of the drive expander module 23, respectively; and the two ends of the eleventh pipe 213 are connected to the output end of the drive expander module 23 and the second medium input end of the second medium flow path 51 of the second heat exchange module 50, respectively.

[0082] like Figure 2 As shown, the two ends of the eighth pipe 210 are connected to the output end of the compressor module 25 and the second medium input end of the first heat exchange system 4, respectively; the ninth pipe 211 includes a first pipe and a second pipe, the second medium output end of the first heat exchange system 4 is connected to the input end of the generator expander module 21 through the first pipe, and the second medium output end of the first heat exchange system 4 is connected to the input end of the drive expander module 23 through the second pipe; the eleventh pipe 213 includes a third pipe and a fourth pipe, the output ends of the generator expander module 21 and the drive expander module 23 are connected to the second medium input end of the second medium flow path 51 of the second heat exchange module 50 through the third pipe and the fourth pipe, respectively.

[0083] like Figure 3 As shown, the two ends of the eighth pipe 210 are connected to the output end of the compressor module 25 and the second medium input end of the second medium flow path 42 of the first heat exchange module 4011 of the first heat exchange system 4, respectively; the ninth pipe 211 includes three branch pipes. The second medium output end of the second medium flow path 42 of the first heat exchange module 4011 is connected to the input end of the first generator expander unit 2101 through the first branch pipe, and the output end of the first generator expander unit 2101 is connected to the first medium flow path 42 of the second heat exchange module 4012 through the second branch pipe. The second medium input end of the second medium flow path 42 of the heat module is connected to the second medium output end of the second medium flow path 42 of the first heat exchange module 4012, which is connected to the input end of the second power generation expander unit 2102 through the third branch pipe; the two ends of the tenth pipe 212 are respectively connected to the output end of the second power generation expander unit 2102 and the input end of the drive expander module 23, and the two ends of the eleventh pipe 213 are respectively connected to the output end of the drive expander module 23 and the second medium input end of the second medium flow path 51 of the second heat exchange module 50.

[0084] like Figures 1 to 3As shown, the main power generation system 2 includes a first drive shaft 214 and a second drive shaft 215. The power generation expander module 21 is mechanically connected to the first generator 22 through the first drive shaft 214, and the drive expander module 23 is mechanically connected to the compressor module 25 through the second drive shaft 215.

[0085] In addition, the generator expander module 21 and the first generator 22 can be mechanically connected via a gearbox to maintain the rotational speed, and the drive expander module 23 and the compressor module 25 can also be mechanically connected via a gearbox to match the optimal rotational speed.

[0086] like Figures 1 to 3 As shown, the waste heat utilization system 3 includes a twelfth pipe 33 and a thirteenth pipe 34. The two ends of the twelfth pipe 33 are respectively connected to the third medium output end of the third medium flow path 52 of the second heat exchange module and the input end of the steam turbine 31. The two ends of the thirteenth pipe 34 are respectively connected to the output end of the steam turbine 31 and the third medium input end of the third medium flow path 52 of the second heat exchange module. The waste heat utilization system 3 also includes a third drive shaft 35, through which the steam turbine 31 is connected to the second generator 32.

[0087] In addition, a mechanical transmission connection can be achieved between the steam turbine unit 31 and the second generator 32 through a gearbox to maintain the rotational speed.

[0088] A second embodiment of the power generation system of this application (not shown) is described in... Figures 1 to 3 The embodiment of the heat storage system 1 shown has added a fourteenth and a fifteenth pipe and reduced the third valve assembly 161. Of course, in other embodiments, it is also possible to... Figures 1 to 3 Based on the embodiment of the thermal storage system 1 shown, a fourteenth pipe or a fifteenth pipe is added separately. The input end of the fourteenth pipe is connected to the first pipe 14, and the output end of the fourteenth pipe is connected to the input end of the first solid thermal storage module. A first valve assembly 141 is provided on the first pipe 14, and a sixth valve assembly is provided on the fourteenth pipe. The input end of the fourteenth pipe is located between the output end of the medium transport module 12 and the first valve assembly 141. In the heat charging mode, the first valve assembly 141 is in the open state, and the sixth valve assembly is in the closed state; in the heat dissipation mode, the first valve assembly 141 is in the closed state, and the sixth valve assembly is in the open state.

[0089] In a second embodiment of the power generation system of this application (not shown), the input end of the fifteenth pipe is connected to the third pipe 16, and the output end of the fifteenth pipe is connected to the input end of the medium transport module 12; only the fourth valve assembly 162 is provided on the third pipe 16, and the third valve assembly 161 is not provided; the fifteenth pipe is provided with a seventh valve assembly; the input end of the fifteenth pipe is located between the output end of the first solid thermal storage module and the fourth valve assembly 162; in the heat charging mode, the seventh valve assembly is in the open state, and the fourth valve assembly 162 is in the closed state; in the heat dissipation mode, the seventh valve assembly is in the closed state, and the fourth valve assembly 162 is in the open state.

[0090] In a second embodiment of the power generation system of this application (not shown), the thermal storage system 1 can switch between a charging mode and a releasing mode by setting a fourteenth pipe, a first valve assembly 141, and a sixth valve assembly. The input end of the fourteenth pipe is connected to the first pipe 14, and the output end is connected to the input end of the first solid thermal storage module. The first pipe 14 is equipped with the first valve assembly 141, and the fourteenth pipe is equipped with the sixth valve assembly. This design ensures that the first medium can flow precisely to the charging module 13 or directly into the solid thermal storage module 11 when needed, thereby optimizing the flow path of the first medium. When the thermal storage system 1 is in the charging mode, the first valve assembly 141 remains open, allowing the first medium to flow from the medium delivery module 12 through the first pipe 14 to the charging module 13. The charging module 13 heats the first medium to a high temperature and then sends it into the solid thermal storage module 11 through the second pipe 15 for thermal energy storage. At this time, the sixth valve assembly is closed, effectively preventing the first medium from directly entering the solid thermal storage module 11 during the charging stage, ensuring the high efficiency of the charging process and the directional storage of energy, while also reducing energy waste and enhancing the system's economy and environmental friendliness. When the thermal storage system 1 is in the heat release mode, the first valve assembly 141 is closed, preventing the first medium from flowing into the charging module 13 and avoiding unnecessary energy consumption. At the same time, the sixth valve assembly is open, allowing the low-temperature first medium to directly enter the solid thermal storage module 11 from the medium delivery module 12 through the fourteenth pipe to absorb the stored thermal energy. Subsequently, it flows from the output end of the first solid thermal storage module through the third pipe 16 to the first heat exchange system 4 to participate in energy conversion and support the operation of the power generation system. When the thermal storage system 1 is in the heat release mode, the first medium does not need to flow through the charging module 13, thereby avoiding the charging module 13 from being washed by the first medium when the thermal storage system 1 is in the heat release mode, thus reducing wear on the charging module 13 and extending its service life. At the same time, due to the complexity of the pipeline in the charging module 13 and the large flow resistance, if the first medium also flows through the charging module 13 when the thermal storage system 1 is in the heat release mode, it will increase the transportation time of the first medium and the transportation energy consumption required to transport the first medium.

[0091] In a second embodiment of the power generation system of this application (not shown), by setting a fifteenth pipe, a fourth valve assembly 162, and a seventh valve assembly, the flow path of the first medium output from the solid thermal storage module 11 can be flexibly switched according to the operating mode of the thermal storage system 1. When the thermal storage system 1 is in the charging mode, the first medium output from the solid thermal storage module 11 is transported to the medium transport module 12 through the fifteenth pipe, without passing through the first heat exchange system 4. On the one hand, this avoids the first heat exchange system 4 being eroded by the first medium when the thermal storage system 1 is in the charging mode, thereby reducing wear on the first heat exchange system 4 and extending its service life. On the other hand, due to the complexity of the piping in the first heat exchange system 4 and the large flow resistance, if the first medium also flows through the first heat exchange system 4 when the thermal storage system 1 is in the charging mode, it will increase the transport time of the first medium and the transport energy consumption required to transport the first medium, and also increase the heat loss of the first medium during the transport process. When the thermal storage system 1 is in the charging mode, the focus of the power generation system operation is on the storage of thermal energy. At this time, the seventh valve assembly is open, while the fourth valve assembly 162 remains closed. The low-temperature first medium is output from the medium delivery module 12, reaches the charging module 13 for heating via the first pipe 14, and then enters the solid thermal storage module 11 via the second pipe 15. The heated first medium exchanges heat with the solid thermal storage module 11 at the input end of the first solid thermal storage module, and then flows out from the output end of the first solid thermal storage module, returning to the medium delivery module 12 via the fifteenth pipe for recirculation. When the thermal storage system 1 is in heat release mode, the seventh valve assembly is closed, while the fourth valve assembly 162 is open, allowing the high-temperature first medium released from the solid thermal storage module 11 to flow to the first heat exchange system 4 via the third pipe 16 to participate in the energy conversion process.

[0092] A third embodiment of the power generation system of this application (not shown) is in relation to... Figures 1 to 3 The illustrated power generation system embodiment has been modified. In this embodiment, the thermal storage system 1 includes a medium delivery module 12, a charging module 13, and a solid thermal storage module 11. The medium delivery module 12 is used to output a first medium, the charging module 13 is used to heat the first medium output from the medium delivery module 12, and the solid thermal storage module 11 has a first solid thermal storage module input terminal, a first solid thermal storage module output terminal, a second solid thermal storage module input terminal, and a second solid thermal storage module output terminal.

[0093] In a third embodiment of the power generation system of this application (not shown), the thermal storage system 1 has a charging mode and a discharging mode. In the charging mode, the output end of the medium transport module 12 is connected to the input end of the charging module 13, the output end of the charging module 13 is connected to the input end of the first solid thermal storage module, and the output end of the first solid thermal storage module is connected to the atmospheric environment or to the input end of the medium transport module 12. In the discharging mode, the output end of the medium transport module 12 is connected to the input end of the second solid thermal storage module, and the output end of the second solid thermal storage module is connected to the first medium input end of the first heat exchange system 4. The first medium output end of the first heat exchange system 4 is connected to the atmosphere or to the input end of the medium transport module 12; wherein, the input end of the first solid thermal storage module and the output end of the second solid thermal storage module are the same port or two independent ports, and the output end of the first solid thermal storage module and the input end of the second solid thermal storage module are the same port or two independent ports; the flow direction of the first medium from the input end of the first solid thermal storage module to the output end of the first solid thermal storage module is opposite to the flow direction of the first medium from the input end of the second solid thermal storage module to the output end of the second solid thermal storage module.

[0094] The thermal storage system 1 of the third embodiment of the power generation system of this application (not shown) enables the thermal storage system to flexibly switch between a heat charging mode and a heat dissipation mode. Furthermore, in this embodiment, the flow direction of the first medium in the solid thermal storage module 11 during the heat charging mode is opposite to that during the heat dissipation mode. This design improves heat exchange efficiency, reduces heat loss, and fully utilizes the thermal energy in the solid thermal storage module. Simultaneously, it stabilizes the temperature gradient distribution inside the solid thermal storage module 11, ensuring a stable temperature of the first medium output from the solid thermal storage module 11.

[0095] In a third embodiment of the power generation system of this application (not shown), when the thermal storage system 1 is in the charging mode: the charging module 13 is in operation, the medium delivery module 12 sends out the low-temperature first medium, which then enters the charging module 13 and is heated to a high temperature. The heated first medium enters the solid thermal storage module 11 through the input end of the first solid thermal storage module and exchanges heat with the solid thermal storage module 11, storing the thermal energy in the solid thermal storage module 11. After the heat exchange is completed, the first medium is discharged from the output end of the first solid thermal storage module and can be directly discharged into the atmospheric environment or returned to the medium delivery module 12. In a third embodiment of the power generation system of this application (not shown), when the thermal storage system 1 is in the heat release mode: the charging module 13 is in a stopped state, the low-temperature first medium is output from the medium delivery module 12, enters the solid thermal storage module 11 through the input terminal of the second solid thermal storage module, absorbs the heat energy stored in the solid thermal storage module 11 in the charging mode, and then flows from the first medium input terminal of the first heat exchange system 4 into the first heat exchange system 4. After the first medium completes heat exchange in the first heat exchange system 4, it is discharged from the first medium output terminal of the first heat exchange system 4. It can also be directly discharged into the atmosphere or recycled back to the medium delivery module 12, and then the next heat release process begins, ensuring the continuous operation of the power generation system. Through the heat release mode, the thermal storage system 1 can stably and efficiently release the stored heat energy, support the energy demand of the power generation system during high load periods, and improve the overall power generation efficiency and thermal energy utilization efficiency of the system.

[0096] In a third embodiment of the power generation system of this application (not shown), the output end of the medium delivery module 12 is connected to the input end of the charging module 13 via a first pipe 14. The output end of the charging module 13 is connected to the input end of the first solid thermal storage module via a second pipe 15. The output end of the first solid thermal storage module is connected to the first medium input end of the first heat exchange system 4 via a third pipe 16. The first medium output end of the first heat exchange system 4 is connected to the input end of the medium delivery module 12 via a fourth pipe 17. The power generation system also includes a sixteenth pipe and a seventeenth pipe. The input end of the sixteenth pipe is connected to the first pipe 14, and the output end of the sixteenth pipe is connected to the third pipe 16. The input end of the seventeenth pipe is connected to the second pipe 15, and the output end of the seventeenth pipe is connected to the third pipe 16. A first valve assembly 141 is provided on the first pipe 14, and the second pipe... A second valve assembly 151 is installed on pipe 15, a fourth valve assembly 162 and a third valve assembly 161 are installed on pipe 16, an eighth valve assembly is installed on pipe 16, and a ninth valve assembly is installed on pipe 17. The input end of pipe 16 is located between the output end of medium conveying module 12 and the first valve assembly 141, the output end of pipe 16 is located between the input end of second solid thermal storage module and the third valve assembly 161, the input end of pipe 17 is located between the output end of second solid thermal storage module and the second valve assembly 151, and the output end of pipe 17 is located between the fourth valve assembly 162 and the third valve assembly 161. Furthermore, the input end of the first solid thermal storage module and the output end of the second solid thermal storage module are the same port, and the output end of the first solid thermal storage module and the input end of the second solid thermal storage module are the same port.

[0097] In a third embodiment of the power generation system of this application (not shown), in the heat charging mode, the energy charging module 13 operates, the first valve assembly 141, the second valve assembly 151, the fourth valve assembly 162, and the third valve assembly 161 are in the open state, and the eighth valve assembly and the ninth valve assembly are in the closed state; in the heat dissipation mode, the energy charging module 13 stops operating, the first valve assembly 141, the second valve assembly 151, and the third valve assembly 161 are in the closed state, and the fourth valve assembly 162, the eighth valve assembly, and the ninth valve assembly are in the open state.

[0098] In a third embodiment of the power generation system of this application (not shown), by connecting the input end of the sixteenth pipe to the first pipe 14 and setting the input end of the sixteenth pipe between the output end of the medium delivery module 12 and the first valve assembly 141, essentially the pipe connecting the output end of the medium delivery module 12 and the input end of the second solid thermal storage module shares a portion of the pipe connecting the output end of the medium delivery module 12 and the input end of the charging module 13. Similarly, by connecting the output end of the seventeenth pipe to the third pipe 16 and setting the output end of the third pipe 16 between the fourth valve assembly 162 and the third valve assembly 161, essentially the pipe connecting the output end of the second solid thermal storage module and the first medium input end of the first heat exchange system 4 shares a portion of the pipe connecting the output end of the first solid thermal storage module and the first medium input end of the first heat exchange system 4. Therefore, by adopting the above scheme, the thermal storage system 1 in this embodiment can effectively reduce the complexity of the pipe layout in the thermal storage system 1, reduce the length of the required pipe layout, and thus significantly reduce costs.

[0099] Furthermore, in the third embodiment of the power generation system of this application (not shown), if the input terminal of the first solid thermal storage module and the output terminal of the second solid thermal storage module are set to the same port, and the output terminal of the first solid thermal storage module and the input terminal of the second solid thermal storage module are set to the same port, the structure of the solid thermal storage module can be effectively simplified.

[0100] In a third embodiment of the power generation system of this application (not shown), the operation process of the thermal storage system 1 in the charging mode is as follows: the charging module 13 operates, opening the first valve assembly 141, the second valve assembly 151, the fourth valve assembly 162, and the third valve assembly 161, and closing the eighth valve assembly and the ninth valve assembly. The first medium is output from the medium delivery module 12 and enters the charging module 13 through the first pipe 14. In the charging module 13, the first medium is heated to a high temperature and then flows to the solid thermal storage module 11 through the second pipe 15 to release heat. The first medium that has completed the heat release in the solid thermal storage module 11 is then transported back to the medium delivery module 12 through the third pipe 16 or discharged into the atmosphere, and then the next charging process begins.

[0101] In a third embodiment of the power generation system of this application (not shown), the operation process of the thermal storage system 1 in the heat release mode is as follows: the charging module 13 stops operating, the first valve assembly 141, the second valve assembly 151, and the third valve assembly 161 are closed, and the fourth valve assembly 162, the eighth valve assembly, and the ninth valve assembly are opened. The first medium is output from the medium delivery module 12 and enters the solid thermal storage module 11 through the sixteenth pipe. After absorbing the heat energy in the solid thermal storage module 11, the first medium is converted into a high-temperature state and then transported to the first heat exchange system 4 through the seventeenth pipe to release heat to the second medium. The first medium that has completed the heat release in the first heat exchange system 4 is transported back to the medium delivery module 12 through the fourth pipe 17 or discharged into the atmosphere, and then the next heat release process begins.

[0102] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0103] The power generation system of this application includes: a thermal storage system 1 containing a first medium; a compressor module 25 configured to compress a second medium; a first heat exchange system 4, the output end of the compressor module 25 being connected to the input end of the second medium of the first heat exchange system 4, so that the second medium output from the output end of the compressor module 25 exchanges heat with the first medium in the thermal storage system 1 in the first heat exchange system 4, thereby transferring the thermal energy stored in the thermal storage system 1 to the second medium in the first heat exchange system 4; an expander system and a first generator 22, the output end of the second medium of the first heat exchange system 4 being connected to the input end of the expander system; wherein, the expander system includes a power generation expander module 21 and a drive expander module 23, the power generation expander module 21 being mechanically connected to the first generator 22, and the drive expander module 23 being mechanically connected to the compressor module 25; and a starting device for starting the power generation system during the start-up phase. Thus, in the power generation system of this application, the thermal storage system 1 is used to store thermal energy and provide thermal energy to the first medium, the compressor module 25 is used to compress the second medium (the second medium should be a medium with compressibility and a large isentropic coefficient, such as at least one of CO2, N2, air, and helium) to compress the second medium to a high temperature and high pressure state, the first heat exchange system 4 is used to realize the transfer of thermal energy from the first medium to the second medium, and the power generation expander module 21 and the first generator 22 of the expander system are used to convert the thermal energy of the second medium into electrical energy, that is, the first heat exchange system 4 further heats up the high temperature and high pressure second medium output from the compressor module 25, and the high temperature and high pressure second medium further heated by the first heat exchange system 4 is then transmitted through the first... The second medium output terminal of the heat exchange system 4 flows out and enters the power generation expander module 21 in the expander system to expand and do work, thereby driving the first generator 22 to generate electricity. The drive expander module 23 is used to drive the compressor module 25 to operate. The starting device is used to ensure the smooth start of the power generation system. By adopting the power generation expander module 21 and the drive expander module 23, the first generator 22 and the compressor module 25 are arranged in a split-shaft configuration, which solves the problem that the arrangement of the Brayton cycle system in the prior art cannot simultaneously achieve the optimal effect of driving the compressor to rotate and ensuring the expander speed. This ensures the effective storage and conversion of thermal energy, improves the power generation efficiency of the power generation system, and at the same time ensures the rapid start and stable operation of the power generation system.

[0104] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0105] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0106] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0107] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0108] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0109] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A power generation system, characterized in that, include: A thermal storage system (1) having a first medium inside; A compressor module (25) configured to compress a second medium; The first heat exchange system (4) has its output end of the compressor module (25) connected to the second medium input end of the first heat exchange system (4) so ​​that the second medium output from the output end of the compressor module (25) exchanges heat with the first medium in the heat storage system (1) in the first heat exchange system (4), thereby transferring the thermal energy stored in the heat storage system (1) to the second medium in the first heat exchange system (4). The expander system and the first generator (22) are connected, and the second medium output end of the first heat exchange system (4) is connected to the input end of the expander system; wherein, the expander system includes a power generation expander module (21) and a drive expander module (23), the power generation expander module (21) is mechanically connected to the first generator (22), and the drive expander module (23) is mechanically connected to the compressor module (25); A starting device for starting the power generation system during the startup phase of the power generation system.

2. The power generation system according to claim 1, characterized in that, Also includes: The second heat exchange system (5) is used to receive the second medium output from the output end of the expander system and use the second medium to heat the third medium; wherein the second medium output end of the second heat exchange system (5) is connected to the input end of the compressor module (25); Waste heat utilization system (3), wherein the waste heat utilization system (3) contains the third medium; the output end of the third medium of the waste heat utilization system (3) is connected to the input end of the third medium of the second heat exchange system (5), and the input end of the third medium of the waste heat utilization system (3) is connected to the output end of the third medium of the second heat exchange system (5); The second medium input end of the second heat exchange system (5) is connected to the output end of the expander system. The second medium and the third medium exchange heat in the second heat exchange system (5) to transfer the heat energy in the second medium to the third medium.

3. The power generation system according to claim 2, characterized in that, The second medium output end of the first heat exchange system (4) is connected to the input end of the power generation expander module (21); The output end of the power generation expander module (21) is connected to the input end of the drive expander module (23), and the output end of the drive expander module (23) is connected to the second medium input end of the second heat exchange system (5).

4. The power generation system according to claim 2, characterized in that, The second medium output end of the first heat exchange system (4) is connected to the input end of the power generation expander module (21) through pipe No. 1, and the second medium output end of the first heat exchange system (4) is connected to the input end of the drive expander module (23) through pipe No.

2. The output end of the power generation expander module (21) is connected to the second medium input end of the second heat exchange system (5), and the output end of the drive expander module (23) is connected to the second medium input end of the second heat exchange system (5).

5. The power generation system according to claim 2, characterized in that, The first heat exchange system (4) includes N first heat exchange modules (401), and the power generation expander module (21) includes N power generation expander units (2100) that are mechanically connected to each other. The N first heat exchange modules (401) and the N power generation expander units (2100) are arranged in a one-to-one correspondence, wherein N is greater than or equal to 2. Each of the first heat exchange modules (401) has a first medium input terminal, a first medium output terminal, a second medium input terminal, and a second medium output terminal; In each of the first heat exchange modules (401), the path through which the first medium flows from the first medium input end to the first medium output end is the first medium flow path (41) of the first heat exchange module, and the path through which the second medium flows from the second medium input end to the second medium output end is the second medium flow path (42) of the first heat exchange module. All the first medium flow paths (41) of the first heat exchange modules are connected in series. In each of the first heat exchange modules (401), the first medium input end of any one of the first heat exchange modules (401) is connected to the first medium output end of the first heat exchange module (401) on one side, and the first medium output end of the first heat exchange module (401) is connected to the first medium input end of the first heat exchange module (401) on the other side. Each of the aforementioned power generator expander units (2100) has an input terminal and an output terminal; In each of the power generation expander units (2100), the path through which the second medium flows from the input end of the power generation expander unit (2100) to the output end of the power generation expander unit (2100) is the second medium flow path of the power generation expander unit; Along the flow direction of the second medium, all the second medium flow paths (42) of the first heat exchange module and all the second medium flow paths of the power generation expander unit are connected in series in sequence, and a second medium flow path of the power generation expander unit is connected in series between any two adjacent second medium flow paths (42) of the first heat exchange module. Along the flow direction of the second medium, the first heat exchange module (401) located at the upstream end is the first heat exchange module (4011), the generator expander unit (2100) located at the upstream end is the first stage generator expander unit, and the generator expander unit (2100) located at the downstream end is the last stage generator expander unit. The second medium input end of the first heat exchange module (4011) is connected to the output end of the compressor module (25), the second medium output end of the first heat exchange module (4011) is connected to the input end of the first stage generator expander unit, and the output end of the last stage generator expander unit is connected to the input end of the drive expander module (23).

6. The power generation system according to claim 2, characterized in that, The third medium includes water; the second heat exchange system (5) is a steam generation system, which is used to receive the second medium output from the output end of the expander system and use the second medium to heat the water working fluid to generate high temperature and high pressure steam; The waste heat utilization system (3) includes a steam turbine unit (31) and a second generator (32). The steam turbine unit (31) is configured to use the high-temperature and high-pressure steam from the steam generation system to generate driving force to drive the second generator (32) to generate electricity. Wherein, when the generator expander module (21) is mechanically connected to the turbine unit (31), the first generator (22) and the second generator (32) are the same generator; or, When the generator expander module (21) and the turbine unit (31) are independent of each other, the first generator (22) and the second generator (32) are two independent generators.

7. The power generation system according to claim 2, characterized in that, The power generation system also includes a cooler (26) for cooling the second medium after it has released heat at the second heat exchange system (5); The input end of the cooler (26) is connected to the second medium output end of the second heat exchange system (5), and the output end of the cooler (26) is connected to the input end of the compressor module (25).

8. The power generation system according to claim 7, characterized in that, The power generation system further includes a gas storage and processing component (24), the input end of which is connected to the output end of the cooler (26), and the output end of which is connected to the input end of the compressor module (25). The gas storage and processing component (24) is used to store or process the second medium and deliver it to the compressor module (25).

9. The power generation system according to any one of claims 1 to 8, characterized in that, The thermal storage system (1) includes a solid thermal storage module (11), a medium conveying module (12), and a charging module (13). The solid thermal storage module (11) has a first solid thermal storage module input terminal and a first solid thermal storage module output terminal. The medium conveying module (12) is used to output the first medium. The charging module (13) is used to heat the first medium output from the medium conveying module (12). The thermal storage system (1) has a heat charging mode and a heat releasing mode; wherein, In the heat charging mode, the output end of the medium delivery module (12) is connected to the input end of the energy charging module (13), the output end of the energy charging module (13) is connected to the input end of the first solid heat storage module, and the output end of the first solid heat storage module is connected to the atmospheric environment or to the input end of the medium delivery module (12). In the heat release mode, the output end of the medium delivery module (12) is connected to the input end of the first solid thermal storage module, the output end of the first solid thermal storage module is connected to the first medium input end of the first heat exchange system (4), and the first medium output end of the first heat exchange system (4) is connected to the atmospheric environment or to the input end of the medium delivery module (12).

10. The power generation system according to claim 9, characterized in that, The thermal storage system (1) includes a first pipe (14), a second pipe (15), a third pipe (16), and a fourth pipe (17). The two ends of the first pipe (14) are connected to the output end of the medium delivery module (12) and the input end of the energy charging module (13), respectively. The two ends of the second pipe (15) are connected to the output end of the energy charging module (13) and the input end of the first solid thermal storage module, respectively. The two ends of the third pipe (16) are connected to the output end of the first solid thermal storage module and the first medium input end of the first heat exchange system (4), respectively. The two ends of the fourth pipe (17) are connected to the first medium output end of the first heat exchange system (4) and the input end of the medium delivery module (12), respectively. In the heat charging mode, the energy charging module (13) operates, and the first heat exchange system (4) stops operating; In the heat release mode, the energy charging module (13) stops operating, and the first heat exchange system (4) operates.

11. The power generation system according to claim 10, characterized in that, The thermal storage system (1) also includes: A first valve assembly (141) and a second valve assembly (151), wherein the first valve assembly (141) is disposed on the first pipe (14) and the second valve assembly (151) is disposed on the second pipe (15); A third valve assembly (161) is disposed on the third pipe (16); and / or a fourth valve assembly (162) is disposed on the third pipe (16); When the third valve assembly (161) and the fourth valve assembly (162) are simultaneously provided on the third pipe (16), the third valve assembly (161) is located on the side of the fourth valve assembly (162) closer to the solid thermal storage module (11) along the flow direction of the first medium.

12. The power generation system according to claim 1, characterized in that, The first medium includes at least one of air and carbon dioxide; and / or, The second medium includes at least one of air, carbon dioxide, nitrogen, helium, and argon.

13. The power generation system according to claim 10, characterized in that, The power generation system also includes: A reheat system, which is coupled to the generator expander module (21); and / or, An intercooling system is coupled to the compressor module (25).

14. The power generation system according to claim 10, characterized in that, The heat energy in the charging module (13) comes from at least one of the following: solar energy absorbed by the concentrating solar collector system, heat energy generated by electric heating of abandoned electricity from the wind power generation system, heat energy generated by electric heating of abandoned electricity from the photovoltaic power generation system, heat energy generated by electric heating of off-peak electricity from the power grid, heat energy generated by high-temperature flue gas, excess heat energy in the coal-fired boiler, heat energy in the waste heat boiler, and industrial waste heat.

15. The power generation system according to claim 1, characterized in that, The starting device includes at least one of a first starting device, a second starting device, and a third starting device; wherein... The first starting device includes a prime mover, which is mechanically connected to the compressor module (25) during the starting phase. The prime mover is configured to drive the compressor module (25) to operate during the starting phase. Furthermore, the prime mover and the compressor module (25) are configured to switch between two states: disengaging the mechanical connection and re-establishing the mechanical connection. The second starting device includes the first generator (22), which is mechanically connected to the compressor module (25) during the starting phase. The first generator (22) is configured during the starting phase to drive the compressor module (25) to operate using electrical energy. The third starting device includes a high-temperature and high-pressure gas source, which is configured to drive the drive expander module (23) to operate during the starting phase.

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