Supercritical carbon dioxide Brayton cycle power generation system

Abstract

The invention relates to the technical field of power generation equipment, and provides a supercritical carbon dioxide Brayton cycle power generation system which comprises a power generation module and a waste heat recovery module. The power generation module comprises a heater, a turbine, a generator, a compressor and a cooler. The cooler is provided with a first hot end and a first cold end. The heater, the turbine, the first hot end and the compressor sequentially communicate end to end to form a power generation circulation loop. And an output shaft of the turbine is coaxially connected with an input shaft of the generator. The waste heat recovery module comprises a heat source pipeline, a thermoelectric converter and a cold source pipeline, the heat source pipeline communicates with the first cold end in an end-to-end mode, and the thermoelectric converter is arranged between the heat source pipeline and the cold source pipeline. According to the supercritical carbon dioxide Brayton cycle power generation system, the heat source pipeline of the waste heat recovery module can recover waste heat generated after power generation of the power generation working medium and is matched with the cold source pipeline to form temperature difference at the two ends of the thermoelectric converter to drive the thermoelectric converter to generate power, the energy conversion efficiency is further improved, the mute performance is good, and the structure is compact.

Description

Technical Field

[0001] The invention relates to the technical field of power generation equipment, and in particular to a supercritical carbon dioxide Brayton cycle power generation system. Background Art

[0002] At present, most power generation systems use steam Rankine cycle systems, which generally have disadvantages such as large size, low conversion efficiency and complex system. In order to improve the energy conversion efficiency, it is usually necessary to deploy waste heat recovery devices to recycle the waste heat of the working fluid after power generation. The existing waste heat recovery devices have the defects of large size and high operating noise. Summary of the invention

[0003] The present invention provides a supercritical carbon dioxide Brayton cycle power generation system, which is used to solve the defects of a waste heat recovery device in the prior art, such as large volume and high operating noise.

[0004] The present invention provides a supercritical carbon dioxide Brayton cycle power generation system, comprising: A power generation module comprises a heater, a turbine, a generator, a compressor and a cooler, wherein the cooler is provided with a first hot end and a first cold end; the heater, the turbine, the first hot end and the compressor are connected end to end in sequence to form a power generation circulation loop; the output shaft of the turbine is coaxially connected to the input shaft of the generator; the power generation circulation loop is used for circulating a power generation medium, and the turbine drives the generator to generate electricity; The waste heat recovery module includes a heat source pipeline, a thermoelectric converter and a cold source pipeline. The heat source pipeline and the first cold end are connected end to end to form a heat source circulation loop. The thermoelectric converter is arranged between the heat source pipeline and the cold source pipeline. The cold source pipeline is used to pass a cold source. The thermoelectric converter is used to generate electricity based on the temperature difference between the heat source pipeline and the cold source pipeline.

[0005] According to the supercritical carbon dioxide Brayton cycle power generation system of the present invention, the cooler includes a first cooler and a second cooler; The first cooler is provided with a second hot end and a second cold end; the second cooler is provided with a third hot end and a third cold end; the turbine, the second hot end, the third hot end and the compressor are connected in sequence; The second cold end is connected end to end with the heat source pipeline, and the third cold end is used to communicate with an external cold source.

[0006] According to the supercritical carbon dioxide Brayton cycle power generation system of the present invention, the thermoelectric converter comprises a heat-conducting housing and a thermoelectric device; The heat-conducting shell is a columnar shell with a through hole along the central axis, and an inner cavity is formed in the columnar shell; the heat source pipeline is passed through the through hole; the cold source pipeline is attached to the outer wall of the heat-conducting shell, and the thermoelectric device is arranged in the inner cavity.

[0007] According to the supercritical carbon dioxide Brayton cycle power generation system of the present invention, there are multiple cold source pipelines and multiple thermoelectric devices; A plurality of the cold source pipelines are arranged at intervals along the circumference of the heat-conducting shell; and a plurality of the thermoelectric devices are arranged at intervals along the circumference of the inner cavity.

[0008] According to the supercritical carbon dioxide Brayton cycle power generation system of the present invention, the heat-conducting shell is a hexagonal prism shell, there are six cold source pipelines, and the six cold source pipelines are respectively attached to the six edges of the heat-conducting shell in a one-to-one correspondence.

[0009] The supercritical carbon dioxide Brayton cycle power generation system according to the present invention further comprises a main pipe, the inlets of the plurality of cold source pipelines are all connected to the main pipe, and the main pipe is used to introduce the cold source into the plurality of cold source pipelines.

[0010] According to the supercritical carbon dioxide Brayton cycle power generation system of the present invention, the main pipe is provided with a first centrifugal pump and a first filter; And / or, the outlet of the heat source pipeline is connected to the second cold end through the second filter and the second centrifugal pump in sequence.

[0011] According to the supercritical carbon dioxide Brayton cycle power generation system of the present invention, the inlet of the third cold end is connected to a third centrifugal pump and a third filter in sequence.

[0012] According to the supercritical carbon dioxide Brayton cycle power generation system of the present invention, the input shaft of the compressor is coaxially connected to the input shaft of the generator.

[0013] According to the supercritical carbon dioxide Brayton cycle power generation system of the present invention, it also includes a regenerator, which is provided with a third hot end and a third cold end, and the third hot end is respectively connected to the exhaust port of the turbine and the air inlet of the hot end; the third cold end is respectively connected to the exhaust port of the compressor and the air inlet of the heater.

[0014] The supercritical carbon dioxide Brayton cycle power generation system of the present invention forms a power generation circulation loop by connecting the heater, the turbine, the first hot end of the cooler and the compressor end to end, so that the power generation medium circulates in the power generation circulation loop to realize the Brayton cycle and drives the generator to rotate and generate electricity through the turbine. The entire power generation module has a compact structure and high power generation efficiency. At the same time, by connecting the first cold end of the cooler with the heat source pipeline of the waste heat recovery module to form a heat source circulation loop, the heat source can circulate in the heat source circulation pipeline, and the waste heat of the medium is recovered in the first cold end to maintain the temperature. In the heat source pipeline, the cold source pipeline is used to form a temperature difference at both ends of the thermoelectric converter to drive the thermoelectric converter to generate electricity. The waste heat recovery module can make full use of the waste heat to further improve the energy conversion efficiency. The thermoelectric converter does not involve moving parts, has good silent performance, and has a compact structure, which effectively solves the defects of the waste heat recovery device in the prior art, which has a large volume and high operating noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of a supercritical carbon dioxide Brayton cycle power generation system provided in an embodiment of the present invention.

[0017] Figure 2 Schematic diagram of a waste heat recovery module provided in an embodiment of the present invention.

[0018] Figure 3 Schematic diagram of a waste heat recovery module provided in an embodiment of the present invention.

[0019] Reference numerals: 1. Supercritical carbon dioxide Brayton cycle power generation system; 11. Power generation module; 111. Heater; 112. Turbine; 113. Generator; 114. Compressor; 115. First cooler; 116. Second cooler; 1161. Third centrifugal pump; 1162. Third filter; 12. Waste heat recovery module; 121. Heat source pipeline; 1211. Second filter; 1212. Second centrifugal pump; 122. Thermoelectric converter; 1221. Heat-conducting housing; 1222. Thermoelectric device; 123. Cold source pipeline; 13. Main pipe; 131. First centrifugal pump; 132. First filter; 14. Regenerator. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Combine the following Figure 1-Figure 3 The supercritical carbon dioxide Brayton cycle power generation system of the present invention is described.

[0022] like Figure 1 As shown, the present invention provides a supercritical carbon dioxide Brayton cycle power generation system 1, comprising: a power generation module 11 and a waste heat recovery module 12. The power generation module 11 comprises a heater 111, a turbine 112, a generator 113, a compressor 114 and a cooler, and the cooler is provided with a first hot end and a first cold end. The heater 111, the turbine 112, the first hot end and the compressor 114 are connected end to end in sequence to form a power generation cycle loop. The output shaft of the turbine 112 and the input shaft of the generator 113 are coaxially connected. The power generation cycle loop is used for circulating the power generation medium, and driving the generator 113 to generate electricity through the turbine 112. The waste heat recovery module 12 includes a heat source pipeline 121, a thermoelectric converter 122 and a cold source pipeline 123. The heat source pipeline 121 and the first cold end are connected end to end to form a heat source circulation loop. The thermoelectric converter 122 is arranged between the heat source pipeline 121 and the cold source pipeline 123. The cold source pipeline 123 is used to introduce a cold source. The thermoelectric converter 122 is used to generate electricity based on the temperature difference between the heat source pipeline 121 and the cold source pipeline 123.

[0023] In this embodiment, the heater 111, the turbine 112, the first hot end and the compressor 114 are connected end to end to form a power generation cycle loop, so that the power generation medium can flow through the heater 111, the turbine 112, the first hot end and the compressor 114 in sequence. It is understandable that the power generation medium can be carbon dioxide. The power generation medium is compressed in the compressor 114, and the compressed power generation medium enters the heater 111 and is heated before being introduced into the turbine 112. The power generation medium expands and performs work in the turbine 112 to drive the output shaft of the turbine 112 to rotate, and drives the generator 113 to rotate and generate electricity. The power generation medium that has completed the work is introduced into the first hot end of the cooler, and returns to the compressor 114 after heat exchange and cooling in the first hot end and the first cold end, completing the Brayton cycle. The power generation medium does not undergo phase change during the cyclic power generation process, and the system structure is simple, more compact, and has high power generation efficiency.

[0024] At the same time, by connecting the first cold end of the cooler and the heat source pipeline 121 of the waste heat recovery module 12 to form a heat source circulation loop, the heat source can circulate in the first cold end and the heat source pipeline 121, and the heat source exchanges heat with the power generation working fluid in the first hot end in the first cold end to recover the waste heat of the power generation working fluid after work. The heated heat source flows back to the heat source pipeline 121 to transfer heat to the thermoelectric converter 122. In conjunction with the cold source pipeline 123, a temperature difference can be formed at both ends of the thermoelectric converter 122. Driven by the temperature difference, the thermoelectric converter 122 can generate electricity based on the Seashell effect, and the heat source that has been cooled after heat transfer returns to the first cold end for heat exchange.

[0025] The supercritical carbon dioxide Brayton cycle power generation system 1 of the present invention forms a power generation circulation loop by connecting the heater 111, the turbine 112, the first hot end of the cooler and the compressor 114 end to end, so that the power generation medium circulates in the power generation circulation loop to realize the Brayton cycle and drives the generator 113 to rotate and generate electricity through the turbine 112. The entire power generation module 11 has a compact structure and high power generation efficiency. At the same time, by connecting the first cold end of the cooler with the heat source pipeline 121 of the waste heat recovery module 12 to form a heat source circulation loop, the heat source can circulate in the heat source circulation pipeline, and the waste heat of the power generation medium is recovered in the first cold end to maintain the temperature. In the heat source pipeline 121, the cold source pipeline 123 is cooperated to form a temperature difference at both ends of the thermoelectric converter 122 to drive the thermoelectric converter 122 to generate electricity. The waste heat recovery module 12 can make full use of the waste heat to further improve the energy conversion efficiency. The thermoelectric converter 122 does not involve moving parts, has good quiet performance, and has a compact structure, which effectively solves the defects of the waste heat recovery device in the prior art that the volume is large and the operation noise is high.

[0026] Optionally, in some embodiments, the heater 111 may be a heat pipe reactor, which has no moving parts and heats the power generation medium (carbon dioxide) through heat pipes, and has a simple structure and good quietness.

[0027] Specifically, in some embodiments, Figure 1 As shown, the cooler includes a first cooler 115 and a second cooler 116. The first cooler 115 is provided with a second hot end and a second cold end; the second cooler 116 is provided with a third hot end and a third cold end; the turbine 112, the second hot end, the third hot end and the compressor 114 are connected in sequence. The second cold end and the heat source pipeline 121 are connected end to end, and the third cold end is used to communicate with an external cold source.

[0028] In this embodiment, the cooler is divided into a first cooler 115 and a second cooler 116, a turbine 112, a second hot end of the first cooler 115, a third hot end of the second cooler 116 and a compressor 114, so that the power generation medium that expands and works in the turbine 112 is sequentially introduced into the second hot end and the third hot end for cooling before being introduced into the compressor 114. At the same time, the second cold end of the first cooler 115 is used to communicate with the heat source pipeline 121 so as to introduce the heat source, so that the heat source exchanges heat with the power generation medium in the second cold end and the second hot end, and the power generation medium in the second cooler 116 exchanges heat with the external cold source. By allocating the heat exchange amount in the first cooler 115 and the second cooler 116, the temperature of the heat source after being heated can be flexibly adjusted without affecting the overall cycle of the power generation module 11, thereby improving the controllability and operational flexibility of the entire system.

[0029] Optionally, a plurality of second coolers 116 may be provided, and the third hot ends of the plurality of second coolers 116 are sequentially connected in series.

[0030] In some embodiments, Figure 1 , Figure 2 and Figure 3 As shown, the thermoelectric converter 122 includes a heat-conducting housing 1221 and a thermoelectric device 1222. The heat-conducting housing 1221 is a cylindrical housing with a through hole along the central axis, and an inner cavity is formed in the cylindrical housing. The heat source pipeline 121 is passed through the through hole. The cold source pipeline 123 is attached to the outer wall of the heat-conducting housing 1221, and the thermoelectric device 1222 is arranged in the inner cavity.

[0031] In this embodiment, the heat-conducting shell 1221 is provided with an inner cavity to set the thermoelectric device 1222, so as to prevent the thermoelectric device 1222 from being exposed to the outside and being oxidized or corroded. The through hole side of the heat-conducting shell 1221 contacts the heat source pipeline 121, and the heat source pipeline 121 transfers heat to the heat-conducting shell 1221 to form a high-temperature side. The outer wall side of the heat-conducting shell 1221 contacts the cold source pipeline 123, and exchanges heat with the cold source pipeline 123 to form a low-temperature side. The thermoelectric device 1222 is arranged between the high-temperature side and the low-temperature side, and the Seebeck effect is generated under the drive of the temperature difference to generate electric energy. At the same time, by setting the heat-conducting shell 1221 as a columnar shell with a through hole along the central axis, the heat-conducting shell 1221 can be sleeved on the outside of the heat source pipeline 121, so that the heat source pipeline 121 and the heat-conducting shell 1221 can fully exchange heat, and at the same time, the heat loss of the heat source pipeline 121 can be reduced, and the energy utilization efficiency can be improved.

[0032] Optionally, in some embodiments, Figure 2 and Figure 3 As shown, there are multiple cold source pipelines 123 and multiple thermoelectric devices 1222. Multiple cold source pipelines 123 are arranged at intervals along the circumference of the heat-conducting housing 1221. Multiple thermoelectric devices 1222 are arranged at intervals along the circumference of the inner cavity.

[0033] In this embodiment, by arranging a plurality of cold source pipelines 123 at intervals along the circumference on the outer wall of the heat-conducting shell 1221, the plurality of cold source pipelines 123 can fully exchange heat with the outer wall of the heat-conducting shell 1221, so that each position of the outer wall is consistent and forms a temperature difference with the through-hole side. A plurality of thermoelectric devices 1222 are arranged at intervals along the circumference of the inner cavity, so as to fully utilize the temperature difference between the outer wall side and the through-hole side of the heat-conducting shell 1221 to generate electricity, and make the entire waste heat recovery module 12 more compact while ensuring the waste heat utilization efficiency.

[0034] It can be understood that the inner cavity of the heat-conducting housing 1221 is a closed cavity, and the gaps between the multiple thermoelectric devices 1222 can be filled with helium to prevent the thermoelectric devices 1222 from being oxidized and extend the service life.

[0035] Specifically, in some embodiments, Figure 2 and Figure 3 As shown, it is characterized in that the heat-conducting shell 1221 is a hexagonal prism shell, and there are six cold source pipelines 123, and the six cold source pipelines 123 are respectively attached to the six edges of the heat-conducting shell 1221 in a one-to-one correspondence.

[0036] In this embodiment, by setting the heat-conducting shell 1221 as a hexagonal prism-shaped shell, and attaching six cold source pipelines 123 to the six edges of the heat-conducting shell 1221 one by one, it is convenient to position the cold source pipeline 123 when installing the cold source pipeline 123, and the cold source pipeline 123 is evenly distributed along the circumference of the heat-conducting shell 1221, so that the temperature distribution of the outer wall of the heat-conducting shell 1221 is more uniform.

[0037] In some embodiments, Figure 1 As shown, the supercritical carbon dioxide Brayton cycle power generation system 1 also includes a main pipe 13 , and the inlets of the plurality of cold source pipelines 123 are all connected to the main pipe 13 . The main pipe 13 is used to introduce the cold source into the plurality of cold source pipelines 123 .

[0038] In this embodiment, the main pipe 13 is connected to the inlets of the plurality of cold source pipelines 123 at the same time, so that the cold source can be introduced into the plurality of cold source pipelines 123 at the same time through the main pipe 13, so as to facilitate the layout of the pipelines. It is understandable that the outlets of the plurality of cold source pipelines 123 can also be connected to another drain pipe at the same time, so as to discharge the used cold source.

[0039] In some embodiments, Figure 1 As shown, the main pipe 13 is provided with a first centrifugal pump 131 and a first filter 132 .

[0040] In this embodiment, a first centrifugal pump 131 and a first filter 132 are provided on the main pipe 13, so that the cold source is filtered and centrifuged before passing the cold source into the cold source pipeline 123, and the corrosive components or impurities in the cold source are removed, so as to avoid corrosion or blockage of the cold source pipeline 123 when the cold source flows into the cold source pipeline 123. It can be understood that by providing the first centrifugal pump 131 and the first filter 132 on the main pipe 13, river water, sea water, etc. are directly extracted as the cold source, so that the entire supercritical carbon dioxide Brayton cycle power generation system 1 is conveniently arranged in riverside or coastal areas, such as for island and reef development.

[0041] When seawater is used as a cold source, the first cooler 115 and the cold source pipeline 123 can be isolated by using an independent heat source pipeline 121, avoiding the cold source pipeline 123 and the first cooler 115 from being connected, thereby preventing seawater from entering the first cooler 115 and causing damage to the first cooler 115, thereby improving the reliability of the entire system.

[0042] It is understood that in some embodiments, Figure 1 As shown, the outlet of the heat source pipeline 121 is connected to the second cold end through the second filter 1211 and the second centrifugal pump 1212 in sequence. In this embodiment, the second filter 1211 and the second centrifugal pump 1212 are arranged at the outlet of the heat source pipeline 121, so as to filter and centrifuge the heat source before the heat source enters the first cooler 115, thereby preventing corrosive substances or impurities in the heat source from entering the first cooler 115, and preventing the first cooler 115 from being corroded or blocked.

[0043] Optionally, the heat source pipeline 121 may use deionized water as a circulating working fluid.

[0044] Optionally, in some embodiments, Figure 1 As shown, the inlet of the third cold end is sequentially connected to a third centrifugal pump 1161 and a third filter 1162. In this embodiment, by arranging the third centrifugal pump 1161 and the third filter 1162 at the inlet of the third cold end, the cold source is filtered and centrifuged before passing into the second cooler 116, so as to remove the corrosive components or impurities in the cold source, and avoid corrosion or blockage of the second cooler 116 when the cold source flows into the second cooler 116, so that the second cooler 116 can also directly draw natural fluids such as seawater or river water as the cold source.

[0045] In some embodiments, Figure 1 As shown, the input shaft of the compressor 114 is coaxially connected to the input shaft of the generator 113 .

[0046] In this embodiment, by coaxially connecting the input shaft of the compressor 114 with the input shaft of the generator 113, the turbine 112 can drive the generator 113 and the compressor 114 to rotate at the same time, so that the compressor 114 can compress the power generation medium without introducing an additional power source, making the entire system structure more compact and occupying less space.

[0047] In some embodiments, Figure 1 As shown, the supercritical carbon dioxide Brayton cycle power generation system 1 also includes a regenerator 14, which is provided with a third hot end and a third cold end, and the third hot end is respectively connected to the exhaust port of the turbine 112 and the air inlet of the first hot end. The third cold end is respectively connected to the exhaust port of the compressor 114 and the air inlet of the heater 111.

[0048] In this embodiment, by setting up the regenerator 14, the power-generating working fluid that has completed expansion and work in the turbine 112 enters the third hot end of the regenerator 14 through the exhaust port, and after heat exchange in the third hot end, enters the first hot end of the cooler to exchange heat with the heat source in the first cold end; the power-generating working fluid compressed in the compressor 114 can enter the third cold end, and after being heated by the third hot end, enters the heater 111 for heating. While making full use of the waste heat in the power-generating working fluid that has completed work, the intake temperature of the first hot end can be adjusted by adjusting the heat exchange in the regenerator 14, and then the temperature of the heat source discharged from the first cold end can be adjusted, thereby improving the controllability and operational flexibility of the entire system.

[0049] It can be understood that, in some embodiments, the third hot end of the regenerator 14 is respectively connected to the exhaust port of the turbine 112 and the air inlet of the second hot end of the first cooler 115. By adjusting the heat exchange amount in the regenerator 14, the first cooler 115 and the second cooler 116, the air inlet temperature and the exhaust temperature of the second hot end of the first cooler 115 can be adjusted so as to adjust the temperature of the heat source after the heat exchange in the first cooler 115, further improving the controllability and operational flexibility of the entire system.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A supercritical carbon dioxide Brayton cycle power generation system, characterized in that: include: A power generation module comprises a heater, a turbine, a generator, a compressor and a cooler, wherein the cooler is provided with a first hot end and a first cold end; the heater, the turbine, the first hot end and the compressor are connected end to end in sequence to form a power generation circulation loop; the output shaft of the turbine is coaxially connected to the input shaft of the generator; the power generation circulation loop is used for circulating a power generation medium, and the turbine drives the generator to generate electricity; The waste heat recovery module includes a heat source pipeline, a thermoelectric converter and a cold source pipeline. The heat source pipeline and the first cold end are connected end to end to form a heat source circulation loop. The thermoelectric converter is arranged between the heat source pipeline and the cold source pipeline. The cold source pipeline is used to pass a cold source. The thermoelectric converter is used to generate electricity based on the temperature difference between the heat source pipeline and the cold source pipeline.

2. The supercritical carbon dioxide Brayton cycle power generation system according to claim 1, characterized in that: The cooler comprises a first cooler and a second cooler; The first cooler is provided with a second hot end and a second cold end; the second cooler is provided with a third hot end and a third cold end; the turbine, the second hot end, the third hot end and the compressor are connected in sequence; The second cold end is connected end to end with the heat source pipeline, and the third cold end is used to communicate with an external cold source.

3. The supercritical carbon dioxide Brayton cycle power generation system according to claim 2, characterized in that: The thermoelectric converter comprises a heat-conducting housing and a thermoelectric device; The heat-conducting shell is a columnar shell with a through hole along the central axis, and an inner cavity is formed in the columnar shell; the heat source pipeline is passed through the through hole; the cold source pipeline is attached to the outer wall of the heat-conducting shell, and the thermoelectric device is arranged in the inner cavity.

4. The supercritical carbon dioxide Brayton cycle power generation system according to claim 3, characterized in that: There are multiple cold source pipelines and multiple thermoelectric devices; A plurality of the cold source pipelines are arranged at intervals along the circumference of the heat-conducting shell; and a plurality of the thermoelectric devices are arranged at intervals along the circumference of the inner cavity.

5. The supercritical carbon dioxide Brayton cycle power generation system according to claim 4, characterized in that: The heat-conducting shell is a hexagonal prism-shaped shell, and there are six cold source pipelines, which are respectively attached to six edges of the heat-conducting shell in a one-to-one correspondence.

6. The supercritical carbon dioxide Brayton cycle power generation system according to claim 4, characterized in that: It also includes a main pipe, and the inlets of the plurality of cold source pipelines are all connected to the main pipe, and the main pipe is used to introduce the cold source into the plurality of cold source pipelines.

7. The supercritical carbon dioxide Brayton cycle power generation system according to claim 5, characterized in that: The main pipe is provided with a first centrifugal pump and a first filter; And / or, the outlet of the heat source pipeline is connected to the second cold end through the second filter and the second centrifugal pump in sequence.

8. The supercritical carbon dioxide Brayton cycle power generation system according to claim 2, characterized in that: The inlet of the third cold end is connected with a third centrifugal pump and a third filter in sequence.

9. The supercritical carbon dioxide Brayton cycle power generation system according to claim 1, characterized in that: An input shaft of the compressor is coaxially connected to an input shaft of the generator.

10. The supercritical carbon dioxide Brayton cycle power generation system according to claim 1, characterized in that: It also includes a regenerator, which is provided with a third hot end and a third cold end, wherein the third hot end is respectively connected to the exhaust port of the turbine and the air inlet of the hot end; and the third cold end is respectively connected to the exhaust port of the compressor and the air inlet of the heater.

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