Solar power generation device and method

Abstract

The invention relates to the technical field of new energy, in particular to a solar power generation device and method.The solar power generation device comprises a tower-type photo-thermal unit and a supercritical CO2 recompression cycle unit which are connected, two compression storage tanks are additionally arranged in supercritical CO2 recompression cycle and used for storing CO2 on the high-pressure side and CO2 on the low-pressure side respectively, and when solar radiation is excessive, the tower-type photo-thermal unit is connected with the supercritical CO2 recompression cycle unit. Power output by the turbine compresses low-pressure fluid in the low-pressure storage tank, and the compressed fluid enters the high-pressure storage tank to be stored; when solar radiation is insufficient, high-pressure CO2 in the high-pressure storage tank is released to the system, the fused salt heat storage system serves as a heat source, the system continues to generate power, and therefore deep utilization of solar energy is achieved.

Description

Technical Field

[0001] This invention relates to the field of new energy technology, and in particular to a solar power generation device and method. Background Technology

[0002] Global climate change is a major challenge facing humanity, and reducing greenhouse gas emissions and developing clean energy have become a global consensus.

[0003] To address the global energy crisis and climate change, vigorously developing renewable energy to replace traditional fossil fuel power generation has become a key path; solar energy, as one of the most abundant renewable energy sources, has attracted much attention for its efficient utilization technology.

[0004] my country has abundant solar energy resources, with more than two-thirds of the country's total area receiving more than 2,000 hours of sunshine annually and an average annual radiation exceeding 0.6 GJ·cm⁻². Thanks to its huge reserves and clean utilization, solar power generation technology has developed rapidly in my country.

[0005] However, solar power generation systems are susceptible to weather, day-night, and seasonal fluctuations, and their energy supply is highly intermittent and volatile, making it impossible to directly match the stable power supply needs of the power grid.

[0006] Existing tower-type solar thermal power generation technologies mostly employ a single molten salt thermal storage system. Although this can achieve cross-time period storage of thermal energy, it cannot smooth out instantaneous power fluctuations during the power generation process, and surplus electricity cannot be efficiently recovered. Although supercritical CO2 power generation cycles have the advantages of high thermal efficiency and small system size, existing technologies have not deeply coupled them with compressed CO2 energy storage, making it impossible to achieve full-time deep utilization of solar energy. Overall, there is still considerable room for improvement in solar energy utilization. Summary of the Invention

[0007] The purpose of this invention is to provide a solar power generation device and method to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A solar power generation device includes a tower-type solar thermal unit, a supercritical CO2 recompression cycle unit, and a CO2 energy storage unit.

[0010] The tower-type solar thermal unit is used to absorb solar energy to heat the thermal storage medium, realizing the conversion and storage of solar energy into thermal energy; the supercritical CO2 recompression cycle unit is used to absorb heat from the thermal storage medium of the tower-type solar thermal unit and convert thermal energy into electrical energy; the CO2 energy storage unit is set in the supercritical CO2 recompression cycle unit, including a high-pressure CO2 storage tank and a low-pressure CO2 storage tank. The low-pressure CO2 storage tank is used to store CO2 on the low-pressure side of the supercritical CO2 recompression cycle unit, and the high-pressure CO2 storage tank is used to store CO2 on the high-pressure side of the supercritical CO2 recompression cycle unit.

[0011] Furthermore, the tower-type solar thermal unit includes a heliostat, an absorber tower, a high-temperature heat storage tank, a low-temperature heat storage tank, a main heater, and a reheater. The heliostat is used to concentrate sunlight onto the absorber tower; the top of the absorber tower is equipped with an absorber, which absorbs the concentrated solar heat to heat the flowing heat storage medium; the inlet of the high-temperature heat storage tank is connected to the medium outlet of the absorber, and it is used to store the heated high-temperature heat storage medium; the outlet of the low-temperature heat storage tank is connected to the medium inlet of the absorber, and it is used to store and recover the heat-exchanged low-temperature heat storage medium, and to supply circulating heat storage medium to the absorber tower; the hot-side inlets of the main heater and the reheater are both connected to the outlet of the high-temperature heat storage tank, and the hot-side outlets are both connected to the inlet of the low-temperature heat storage tank. The main heater is used to heat the CO2 working fluid in the supercritical CO2 recompression cycle unit, and the reheater is used to reheat the CO2 working fluid in the supercritical CO2 recompression cycle unit.

[0012] Furthermore, the supercritical CO2 recompression cycle unit includes a first turbine, a second turbine, a high-temperature regenerator, a low-temperature regenerator, a cooler, a main compressor, and a recompressor. The cold-side working fluid outlet of the main heater is connected to the working fluid inlet of the first turbine, the working fluid outlet of the first turbine is connected to the cold-side working fluid inlet of the reheater, and the cold-side working fluid outlet of the reheater is connected to the working fluid inlet of the second turbine; the exhaust steam outlet of the first turbine is connected to the hot-side inlet of the high-temperature regenerator, and the hot-side outlet of the high-temperature regenerator is connected to the hot-side inlet of the low-temperature regenerator; the first hot-side outlet of the low-temperature regenerator is connected to the working fluid inlet of the cooler, the working fluid outlet of the cooler is connected to the working fluid inlet of the main compressor, and the working fluid outlet of the main compressor is connected to the cold-side inlet of the low-temperature regenerator; the second hot-side outlet of the low-temperature regenerator is connected to the working fluid inlet of the reheater, and the working fluid outlet of the reheater is connected to the cold-side inlet of the high-temperature regenerator; the cold-side outlet of the low-temperature regenerator is connected to the cold-side inlet of the high-temperature regenerator, and the cold-side outlet of the high-temperature regenerator is connected to the cold-side working fluid inlet of the main heater, forming a closed-loop circulation circuit.

[0013] Furthermore, the working fluid inlet of the low-pressure CO2 storage tank is connected to the hot-side outlet of the low-temperature regenerator, and the working fluid outlet of the low-pressure CO2 storage tank is connected to the working fluid inlet of the cooler; the working fluid inlet of the high-pressure CO2 storage tank is connected to the working fluid outlet of the main compressor, and the working fluid outlet of the high-pressure CO2 storage tank is connected to the cold-side inlet of the low-temperature regenerator.

[0014] Furthermore, the power output end of the first turbine is connected to the power input end of the main compressor and the re-compressor respectively, for providing drive power to the main compressor and the re-compressor.

[0015] Furthermore, the heat storage medium used in the tower-type solar thermal unit is molten salt, which, by mass percentage, comprises 60 wt% NaNO3 and 40 wt% KNO3.

[0016] Furthermore, the temperature of the heat storage medium supplied by the tower-type photothermal unit to the supercritical CO2 recompression cycle unit is 500℃~600℃, preferably 550℃~570℃.

[0017] A solar power generation method includes the following steps:

[0018] S1. Solar thermal collection and storage stage: The heliostat of the tower-type solar thermal unit concentrates sunlight to the absorber at the top of the absorber tower. The absorber absorbs solar energy to heat the molten salt heat storage medium. The heated high-temperature molten salt is then sent to a high-temperature heat storage tank for storage. The low-temperature molten salt, after being cooled by the main heater and reheater, is sent to a low-temperature heat storage tank for recovery and then circulated back to the absorber tower for reheating.

[0019] S2, in the conventional power generation cycle stage, the high-temperature molten salt in the high-temperature heat storage tank is transported to the main heater and reheater. The high-temperature molten salt is used as the driving heat source to heat the CO2 working fluid in the supercritical CO2 recompression cycle unit, forming high-temperature and high-pressure supercritical CO2. This CO2 drives the first turbine and the second turbine to expand and do work, thereby driving the generator to generate electricity. After the exhaust steam has done work, it recovers waste heat through two-stage regenerators. Part of it is cooled by a cooler and then enters the main compressor for compression, while the other part directly enters the recompression compressor for compression. The compressed working fluid is preheated by two-stage regenerators and then returns to the main heater, completing the supercritical CO2 recompression Brayton cycle.

[0020] S3, surplus energy storage stage: When solar radiation is excessive and the system's power generation exceeds the demand for electricity, the surplus power output from the first turbine is used to compress the low-pressure CO2 fluid in the low-pressure CO2 storage tank. The compressed high-pressure CO2 fluid is then sent into the high-pressure CO2 storage tank for storage, completing the conversion and storage of electrical energy into pressure energy.

[0021] S4, Energy Storage, Release, and Power Generation Stage: When solar radiation is insufficient, there is no sunlight, or there is peak electricity demand, the high-pressure CO2 fluid in the high-pressure CO2 storage tank is released to the supercritical CO2 recompression cycle unit to replenish the high-pressure working fluid and pressure of the system. At the same time, the high-temperature molten salt stored in the high-temperature heat storage tank is used as a heat source to continuously heat the CO2 working fluid and drive the supercritical CO2 recompression cycle unit to generate electricity continuously and stably.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. This invention deeply couples a tower-type solar thermal unit, a supercritical CO2 recompression cycle unit, and a CO2 energy storage unit to construct a dual energy storage system of molten salt thermal storage and compressed CO2 energy storage. Molten salt thermal storage enables long-term, large-capacity storage of thermal energy, while compressed CO2 energy storage enables rapid response and instantaneous regulation of electrical energy. The two work together to solve the problem of intermittent solar power generation and smooth grid load fluctuations, thereby significantly improving the utilization rate of solar energy and the stability of power supply.

[0024] 2. This invention fully embeds the CO2 energy storage unit into the supercritical CO2 recompression cycle system, sharing the core equipment such as the compressor, cooler, and regenerator of the cycle system. There is no need to build an additional independent compression energy storage system, which greatly reduces the system's equipment cost, floor space, and operating energy consumption. At the same time, it achieves seamless connection between the energy storage and release process and the main power generation cycle, improving the system's response speed and operating efficiency.

[0025] 3. This invention uses a supercritical CO2 recompression Brayton cycle as the power generation cycle. Compared with the traditional steam Rankine cycle, it has higher thermal efficiency, smaller system volume, and faster start-up and shutdown speed. It is perfectly compatible with the high-temperature molten salt thermal storage system of tower solar thermal power, which can give full play to the thermal energy advantages of high-temperature molten salt and further improve the overall power generation efficiency of the system.

[0026] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of a solar power generation device and method.

[0029] 1. Tower-type solar thermal unit; 11. Heliostat; 12. Absorber tower; 13. High-temperature thermal storage tank; 14. Low-temperature thermal storage tank; 15. Main heater; 16. Reheater; 2. Supercritical CO2 recompression cycle unit; 21. First turbine; 22. Second turbine; 23. High-temperature regenerator; 24. Low-temperature regenerator; 25. Low-pressure CO2 storage tank; 26. Cooler; 27. Main compressor; 28. High-pressure CO2 storage tank; 29. ​​Recompressor. Detailed Implementation

[0030] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0031] Example 1:

[0032] Please see Figure 1 In this embodiment of the invention, a solar power generation device includes a tower-type solar thermal unit 1, a supercritical CO2 recompression cycle unit 2, and a CO2 energy storage unit.

[0033] The tower-type solar thermal unit 1 includes a heliostat 11, an absorber tower 12, a high-temperature heat storage tank 13, a low-temperature heat storage tank 14, a main heater 15, and a reheater 16. The heliostat 11 adopts a ring-shaped, staggered, unobstructed, and subdivided mirror field arrangement, focusing on the absorber at the top of the absorber tower 12. The medium outlet of the absorber is connected to the inlet of the high-temperature heat storage tank 13. The outlet of the high-temperature heat storage tank 13 is connected to the hot-side inlets of the main heater 15 and the reheater 16, respectively. The hot-side outlets of the main heater 15 and the reheater 16 are both connected to the inlet of the low-temperature heat storage tank 14. The outlet of the low-temperature heat storage tank 14 is connected to the medium inlet of the absorber, forming a molten salt circulation loop.

[0034] The supercritical CO2 recompression cycle unit 2 includes a first turbine 21, a second turbine 22, a high-temperature regenerator 23, a low-temperature regenerator 24, a cooler 26, a main compressor 27, and a recompressor 29. The cold-side working fluid outlet of the main heater 15 is connected to the working fluid inlet of the first turbine 21, the working fluid outlet of the first turbine 21 is connected to the cold-side working fluid inlet of the reheater 16, and the cold-side working fluid outlet of the reheater 16 is connected to the working fluid inlet of the second turbine 22. The exhaust steam outlet of the first turbine 21 is connected to the hot-side inlet of the high-temperature regenerator 23, and the hot-side outlet of the high-temperature regenerator 23 is connected to the hot-side inlet of the low-temperature regenerator 24. The first hot-side outlet of the low-temperature regenerator 24 is connected to the working fluid inlet of the cooler 26. The working fluid outlet of the first turbine 21 is connected to the working fluid inlet of the main compressor 27, and the working fluid outlet of the main compressor 27 is connected to the cold-side inlet of the low-temperature regenerator 24; the hot-side second outlet of the low-temperature regenerator 24 is connected to the working fluid inlet of the re-compressor 29, and the working fluid outlet of the re-compressor 29 is connected to the cold-side inlet of the high-temperature regenerator 23; the cold-side outlet of the low-temperature regenerator 24 is connected to the cold-side inlet of the high-temperature regenerator 23, and the cold-side outlet of the high-temperature regenerator 23 is connected to the cold-side working fluid inlet of the main heater 15, forming a closed-loop CO2 circulation circuit. The power output end of the first turbine 21 is connected to the power input ends of the main compressor 27 and the re-compressor 29 respectively.

[0035] The CO2 energy storage unit includes a low-pressure CO2 storage tank 25 and a high-pressure CO2 storage tank 28. The working fluid inlet of the low-pressure CO2 storage tank 25 is connected to the hot side outlet of the low-temperature regenerator 24, and the working fluid outlet of the low-pressure CO2 storage tank 25 is connected to the working fluid inlet of the cooler 26. The working fluid inlet of the high-pressure CO2 storage tank 28 is connected to the working fluid outlet of the main compressor 27, and the working fluid outlet of the high-pressure CO2 storage tank 28 is connected to the cold side inlet of the low-temperature regenerator 24.

[0036] In this embodiment, the heat storage medium used in the tower-type solar thermal unit is a binary molten salt, which includes 60 wt% NaNO3 and 40 wt% KNO3 by mass percentage; the temperature of the molten salt supplied by the tower-type solar thermal unit to the supercritical CO2 recompression cycle unit is 565°C.

[0037] Example 2:

[0038] This embodiment provides a solar power generation method, implemented using the solar power generation device described in Embodiment 1, with the following specific steps:

[0039] S1. Solar thermal collection and storage stage: The heliostat 11 concentrates sunlight onto the absorber at the top of the heat-absorbing tower 12. The absorber absorbs the concentrated solar energy and heats the flowing binary molten salt to 565°C. The heated high-temperature molten salt is then sent to the high-temperature heat storage tank 13 for sealed storage. After heat exchange with the CO2 working fluid through the main heater 15 and the reheater 16, the low-temperature molten salt, which is cooled to 290°C, is sent to the low-temperature heat storage tank 14 for recovery. It is then circulated back to the absorber in the heat-absorbing tower 12 by a transfer pump for reheating, completing the heat collection-storage-exchange cycle of the molten salt.

[0040] S2, Conventional Power Generation Cycle Stage: When solar radiation is stable, the 565°C high-temperature molten salt in the high-temperature thermal storage tank 13 is transported to the main heater 15 and the reheater 16 respectively. In the main heater 15, the high-temperature molten salt heats the CO2 working fluid, which has been preheated by the high-temperature regenerator 23, to a supercritical state of 550°C and 20MPa. The supercritical CO2 enters the first turbine 21, expands, and does work, driving the generator to generate electricity, and simultaneously driving the main compressor 27 and the reheater 29. The 350°C exhaust steam discharged from the first turbine 21 enters the reheater 16, is reheated to 550°C by the high-temperature molten salt, and then enters the second turbine 22 to continue expanding and doing work. Electricity; the exhaust steam discharged from the second turbine 22 merges with the waste heat exhaust steam from the first turbine 21, and then enters the high-temperature regenerator 23 and the low-temperature regenerator 24 in sequence to exchange heat with the low-temperature CO2 working fluid on the cold side and recover waste heat; the exhaust steam after heat exchange is divided into two paths, one path is cooled to 32°C and 7.4MPa by the cooler 26 and then enters the main compressor 27 to be compressed to 20MPa, and the other path directly enters the recompression compressor 29 to be compressed to 20MPa; the two paths of CO2 working fluid after compression are preheated by the low-temperature regenerator 24 and the high-temperature regenerator 23 in sequence, and then return to the main heater 15 for reheating to complete the complete supercritical CO2 recompression Brayton cycle.

[0041] S3, Surplus Energy Storage Stage: When there is excess solar radiation at noon and the system's power generation exceeds the grid's power demand, the surplus power output from the first turbine 21 drives the compressor unit to compress the 7.4MPa low-pressure CO2 working medium stored in the low-pressure CO2 storage tank 25 to 20MPa. The compressed high-pressure CO2 working medium is then sent to the high-pressure CO2 storage tank 28 for sealed storage, converting the surplus solar energy into the pressure energy of CO2 for storage, thus avoiding the waste of solar energy.

[0042] S4, Energy Storage, Release, and Power Generation Stage: During nighttime when there is no solar radiation, on cloudy or rainy days when radiation is insufficient, or during peak electricity consumption, the outlet valve of the high-pressure CO2 storage tank 28 is opened to release the stored 20MPa high-pressure CO2 working fluid to the cold side inlet of the low-temperature regenerator 24, replenishing the high-pressure working fluid and pressure of the circulation system without the need for additional compression power consumption; at the same time, the high-temperature molten salt stored in the high-temperature heat storage tank 13 continuously provides heat source for the main heater 15 and the reheater 16, heating the CO2 working fluid to drive the circulation system to generate electricity continuously and stably, realizing the full-time utilization of solar energy.

[0043] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the description and drawings above. However, any modifications, alterations, and variations made by those skilled in the art without departing from the scope of the present invention using the disclosed technical content are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A solar power generation device, characterized in that, The system includes a tower-type solar thermal unit, a supercritical CO2 recompression cycle unit, and a CO2 energy storage unit. The tower-type solar thermal unit is used to absorb solar energy to heat the thermal storage medium. The supercritical CO2 recompression cycle unit is used to absorb heat from the thermal storage medium of the tower-type solar thermal unit and generate electricity. The CO2 energy storage unit is located in the supercritical CO2 recompression cycle unit. The CO2 energy storage unit includes a high-pressure CO2 storage tank and a low-pressure CO2 storage tank. The low-pressure CO2 storage tank is used to store CO2 on the low-pressure side of the supercritical CO2 recompression cycle unit, and the high-pressure CO2 storage tank is used to store CO2 on the high-pressure side of the supercritical CO2 recompression cycle unit.

2. The solar power generation device according to claim 1, characterized in that, The tower-type solar thermal unit includes a heliostat, an absorber tower, a high-temperature thermal storage tank, a low-temperature thermal storage tank, a main heater, and a reheater. The heliostat is used to concentrate sunlight onto the absorber tower. The absorber tower is used to heat the thermal storage medium using solar energy. A heat absorber is installed at the top of the absorber tower. The heat absorber is used to absorb the heat from the sunlight to heat the thermal storage medium. The high-temperature thermal storage tank is used to store the thermal storage medium heated by the absorber tower. The low-temperature thermal storage tank is used to store and recover the thermal storage medium after heat exchange. The low-temperature thermal storage tank is connected to the absorber tower and supplies the absorber tower with the thermal storage medium. The main heater is used to heat the CO2 working fluid in the supercritical CO2 recompression cycle unit. The reheater is used to reheat the CO2 working fluid in the supercritical CO2 recompression cycle unit.

3. A solar power generation device according to claim 2, characterized in that, The supercritical CO2 recompression cycle unit includes a first turbine, a second turbine, a high-temperature regenerator, a low-temperature regenerator, a cooler, a main compressor, and a recompressor. The working fluid outlet of the main heater is connected to the working fluid inlet of the first turbine, the working fluid outlet of the first turbine is connected to the working fluid inlet of the reheater, the working fluid outlet of the reheater is connected to the working fluid inlet of the second turbine, the exhaust steam outlet of the first turbine is connected to the hot-side inlet of the high-temperature regenerator, the hot-side outlet of the high-temperature regenerator is connected to the hot-side inlet of the low-temperature regenerator, the first hot-side outlet of the low-temperature regenerator is connected to the working fluid inlet of the cooler, the working fluid outlet of the cooler is connected to the working fluid inlet of the main compressor, the working fluid outlet of the main compressor is connected to the cold-side inlet of the low-temperature regenerator, the second hot-side outlet of the low-temperature regenerator is connected to the working fluid inlet of the recompressor, the working fluid outlet of the recompressor is connected to the cold-side inlet of the high-temperature regenerator, the cold-side outlet of the low-temperature regenerator is connected to the cold-side inlet of the high-temperature regenerator, and the cold-side outlet of the high-temperature regenerator is connected to the working fluid inlet of the main heater.

4. A solar power generation device according to claim 3, characterized in that, The working fluid inlet of the low-pressure CO2 storage tank is connected to the hot side outlet of the low-temperature regenerator, the working fluid outlet of the low-pressure CO2 storage tank is connected to the working fluid inlet of the cooler, the working fluid inlet of the high-pressure CO2 storage tank is connected to the working fluid outlet of the main compressor, and the working fluid outlet of the high-pressure CO2 storage tank is connected to the cold side inlet of the low-temperature regenerator.

5. A solar power generation device according to claim 3, characterized in that, The first turbine is connected to the main compressor and the re-compressor respectively, and the first turbine is used to provide drive power to the main compressor and the re-compressor.

6. A solar power generation device according to claim 1, characterized in that, The heat storage medium used in the tower-type solar thermal unit is molten salt, which, by mass percentage, comprises 60 wt% NaNO3 and 40 wt% KNO3.

7. A solar power generation device according to claim 3, characterized in that, The temperature of the heat storage medium supplied by the tower-type photothermal unit to the supercritical CO2 recompression cycle unit is 500℃~600℃.

8. A solar power generation method, applied to a solar power generation device according to any one of claims 1-7, characterized in that, Includes the following steps: S1, the solar thermal collection and storage stage, the solar thermal unit uses heliostats to collect sunlight to the heat absorption tower, and the heat absorption unit absorbs solar energy to heat the heat storage medium. The heated high-temperature heat storage medium is sent to the high-temperature heat storage tank for storage, and the low-temperature heat storage medium after heat exchange is sent to the low-temperature heat storage tank for recovery and circulated to the heat absorption tower for heating. S2, the conventional power generation cycle stage, the high-temperature heat storage medium in the high-temperature heat storage tank is transported to the main heater and reheater. The high-temperature heat storage medium is used as the driving heat source to heat the CO2 working medium in the supercritical CO2 recompression cycle unit, forming supercritical CO2 to drive the first turbine and the second turbine to do work and generate electricity, thus completing the supercritical CO2 recompression Brayton cycle. S3, the surplus energy storage stage: when there is excess solar radiation, the surplus electricity output from the first turbine is used to compress the low-pressure CO2 fluid in the low-pressure CO2 storage tank, and the compressed high-pressure CO2 fluid is sent into the high-pressure CO2 storage tank for storage, thus completing the conversion and storage of electrical energy into pressure energy. S4, Energy Storage, Energy Release, and Power Generation Stage: When solar radiation is insufficient, the high-pressure CO2 fluid in the high-pressure CO2 storage tank is released to the supercritical CO2 recompression cycle unit. At the same time, the high-temperature heat storage medium stored in the high-temperature heat storage tank is used as a heat source to continuously heat the CO2 working fluid, driving the supercritical CO2 recompression cycle unit to generate electricity continuously and stably.

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