Supercritical fluid and gas turbine combined cycle systemTechnical Field
The invention relates to a supercritical fluid and gas turbine combined cycle system, and belongs to the technical field of supercritical fluids.
Background
The supercritical fluid (e.g., supercritical carbon dioxide SCCO2) has specific physicochemical properties and is suitable for various technical fields, for example, can be used as a dry cleaning solvent for preparing micro-or nano-sized particles, and in addition, can be used for a combined cycle of steam turbines or a closed gas turbine (e.g., brayton energy cycle) based on the very high thermal efficiency (about 45%) of the supercritical fluid, and the high efficiency can not only improve the fuel utilization rate of each power generation unit to 40% or more, but also reduce the cost of a power plant by about 18% compared with the conventional rankine steam cycle.
In the prior art, a scheme of combining a gas turbine with a supercritical fluid circulation is disclosed in the prior art, for example, US9540999B2 discloses a scheme of a supercritical fluid double-circulation power generation system, specifically, the system comprises two circulation systems, wherein the first circulation system belongs to a circulation system based on the gas turbine, the second circulation system belongs to a circulation system based on the supercritical fluid, the two systems realize heat exchange through a heat exchanger, and then the supercritical fluid in the second circulation system is utilized as a working medium to drive a turbine to rotate, so as to drive a coaxially arranged power generator to generate power. However, in the combined cycle scheme of the prior art, the tail gas of the gas turbine is not utilized and treated, but is directly discharged into the atmosphere, so that heat is wasted. Therefore, how to reduce or avoid waste of gas heat in a combined cycle of supercritical fluid and gas turbine is a current urgent need.
Disclosure of Invention
In view of the above prior art, the present invention provides a supercritical fluid and gas turbine combined cycle system.
The invention is realized by the following technical scheme:
The supercritical fluid and gas turbine combined cycle system comprises a gas turbine subsystem and a supercritical fluid circulation subsystem, wherein the gas turbine subsystem and the supercritical fluid circulation subsystem are mutually independent, the gas turbine subsystem comprises a first gas compressor, a combustion chamber, a first turbine and a first generator, the supercritical fluid circulation subsystem comprises a rotor system, a first heat exchanger and a second heat exchanger,
The first compressor, the first turbine and the first generator in the gas turbine subsystem are coaxially arranged, the exhaust end of the first compressor is communicated with the air inlet end of the combustion chamber, the air outlet end of the combustion chamber is communicated with the air inlet end of the first turbine, the air outlet end of the first turbine is communicated with the inlet end of the first passage of the first heat exchanger (the heat exchanger is provided with two passages, the first passage and the fluid in the second passage can exchange heat, for example, the heat exchange is realized through fins, and the heat exchange is common knowledge and is not repeated);
the rotor system in the supercritical fluid circulation subsystem comprises a second compressor, a second turbine and a second generator which are coaxially arranged, wherein the outlet end of the second compressor is communicated with the inlet end of the second passage of the first heat exchanger, the outlet end of the second passage of the first heat exchanger is communicated with the inlet end of the second turbine, and the outlet end of the second turbine is communicated with the inlet end of the second heat exchanger.
Further, the supercritical fluid circulation subsystem further comprises a supercritical fluid storage tank for providing supercritical fluid in an initial stage or when pressurization is required, and an outlet end of the supercritical fluid storage tank is communicated with an inlet end of the second compressor.
Further, an electromagnetic valve is arranged at the outlet end of the supercritical fluid storage tank so as to control the opening and closing of the supercritical fluid storage tank.
Further, the supercritical fluid circulation subsystem is arranged in a sealed box body, the sealed box body is filled with supercritical fluid and has a pressure of 7-10 mpa, the outlet end of the second passage of the second heat exchanger is communicated with the inlet end of the second gas compressor, or the outlet end of the second heat exchanger is directly communicated with the interior of the sealed box body (the supercritical fluid of the circulation pipeline can be directly discharged into the sealed box body), and the inlet end of the second gas compressor is also directly communicated with the interior of the sealed box body (namely, the supercritical fluid entering the second gas compressor is partly from the circulation pipeline and partly from the interior of the sealed box body).
Further, a booster pump is arranged in the sealed box body, the booster pump is communicated with the supercritical fluid storage tank (can be positioned at the outlet of the supercritical fluid storage tank), and can be used for providing pressurized supercritical fluid for a supercritical fluid circulating runner pipeline by taking the supercritical fluid storage tank as a supercritical fluid source when needed, or is controllably communicated with an external pipeline of the sealed box body and is used for supplementing gas from the external environment of the sealed box body to pressurize the internal environment of the sealed box body when needed.
Further, a flow guide cover (for protecting the generator from being blown by the high-temperature supercritical fluid and avoiding corrosion or other problems) is arranged at the outlet end of the second turbine of the supercritical fluid circulation subsystem, and is used for guiding the working medium discharged from the outlet end of the second turbine to the second heat exchanger.
Further, the rotor system of the supercritical fluid circulation subsystem can be arranged as a generator-to-trailer structure to improve the power generation efficiency (the rotating speed of the rotor system driven by the supercritical fluid circulation can be up to 10-20 w RPM).
Further, the number of the second generators of the rotor system of the supercritical fluid circulation subsystem is more than two. The second generator can be arranged at two ends of the rotating shaft (more than two second generators can be arranged at each end) or between the second air compressor and the second turbine, and the purpose of the arrangement is that 1, if the number and the power of motors at the two ends are consistent, the balance of the force and the load is facilitated, 2, the motors can adopt commercially available conventional motors, and proper power generation is achieved by arranging a plurality of motors, so that the cost is saved.
Further, the supercritical fluid circulation subsystem further comprises a fluid bearing (the structure of which is similar to that of an air bearing, but the supporting air film of which is the supercritical fluid), and the supporting medium of the fluid bearing is the supercritical fluid in a sealed box body.
Further, the fluid bearing is a dynamic pressure fluid bearing or a dynamic-static pressure integrated bearing. When the dynamic pressure bearing is selected (i.e., by rotating self-suspension), the film layer can be formed by the supercritical fluid, and the supercritical fluid has a higher density than air and better fluidity than liquid, so that better film layer rigidity can be provided, the rotation stability of the rotor system is improved, and the improvement of the rotation speed of the rotor (the rotation speed of the rotor system of the supercritical fluid circulation is required to be higher than the rotation speed of the combustion engine) is facilitated.
Further, the fluid bearing comprises at least one radial bearing and at least one thrust bearing.
Further, the rotor system of the critical fluid circulation subsystem is structurally characterized by comprising a rotating shaft, wherein a generator A, a second air compressor, a second turbine and a generator B are sequentially arranged on the rotating shaft, namely, the generator A and the generator B are respectively arranged at two ends or two sides of the rotating shaft to form a generator dragging structure.
Further, the radial bearing and/or thrust bearing may be provided at an end of the rotating shaft, outside the generator a, between the generator a and the second compressor, between the second compressor and the second turbine, between the second turbine and the generator B, and/or outside the generator B.
Preferably, the rotor system of the critical fluid circulation subsystem is configured as one of:
① The device comprises a rotating shaft, wherein a first radial bearing, a first thrust bearing, a generator A, a second air compressor, a second radial bearing, a second turbine, a generator B, a second thrust bearing and a third radial bearing are sequentially arranged on the rotating shaft;
② The device comprises a rotating shaft, wherein a first radial bearing, a generator A, a first thrust bearing, a second compressor, a second radial bearing, a second turbine, a second thrust bearing, a generator B and a third radial bearing are sequentially arranged on the rotating shaft;
③ The device comprises a rotating shaft, wherein a first thrust bearing, a first radial bearing, a generator A, a second air compressor, a second radial bearing, a second turbine, a generator B, a third radial bearing and a second thrust bearing are sequentially arranged on the rotating shaft;
④ The device comprises a rotating shaft, wherein a first radial bearing, a first thrust bearing, a generator A, a fourth radial bearing, a second compressor, a second radial bearing, a second turbine, a fifth radial bearing, a generator B, a second thrust bearing and a third radial bearing are sequentially arranged on the rotating shaft;
⑤ The device comprises a rotating shaft, wherein a first thrust bearing, a first radial bearing, a generator A, a fourth radial bearing, a second compressor, a second radial bearing, a second turbine, a fifth radial bearing, a generator B, a third radial bearing and a second thrust bearing are sequentially arranged on the rotating shaft;
⑥ The device comprises a rotating shaft, wherein a first radial bearing, a generator A, a first thrust bearing, a fourth radial bearing, a second compressor, a second radial bearing, a second turbine, a fifth radial bearing, a second thrust bearing, a generator B and a third radial bearing are sequentially arranged on the rotating shaft;
⑦ The device comprises a rotating shaft, wherein a first radial bearing, a generator A, a fourth radial bearing, a first thrust bearing, a second compressor, a second radial bearing, a second turbine, a second thrust bearing, a fifth radial bearing, a generator B and a third radial bearing are sequentially arranged on the rotating shaft;
⑧ The device comprises a rotating shaft, wherein a first radial bearing, a generator A, a second compressor, a first thrust bearing, a second radial bearing, a second turbine, a sixth radial bearing, a generator B and a third radial bearing are sequentially arranged on the rotating shaft;
⑨ The device comprises a rotating shaft, wherein a first radial bearing, a generator A, a fourth radial bearing, a second air compressor, a first thrust bearing, a second radial bearing, a second turbine, a sixth radial bearing, a fifth radial bearing, a generator B and a third radial bearing are sequentially arranged on the rotating shaft.
Further, the second heat exchanger is an air-cooled heat exchanger.
Further, components (a first heat exchanger, a second air compressor, a second turbine, a guide cover, pipelines used for communication and the like) involved in the supercritical fluid circulation subsystem are subjected to corrosion prevention treatment (such as a corrosion prevention coating, a corrosion prevention material and the like), and the reason is that the ideal working temperature interval of the supercritical fluid is 500-600 ℃, and the supercritical fluid has strong corrosiveness beyond the temperature interval. The pipelines between the first compressor and the first heat exchanger, the first heat exchanger and the second turbine, and the second turbine and the second heat exchanger can adopt heat insulation treatment (heat preservation).
Further, the pressure ratio of the second compressor of the supercritical fluid circulation subsystem is set to be 2-3 times.
Further, the pressure ratio of the first compressor of the gas turbine subsystem is set to be 3-4 times.
The control method of the supercritical fluid and gas turbine combined cycle system comprises the following steps:
the method comprises the steps of switching a first generator in a gas turbine subsystem to a motor mode for operation, dragging a first turbine to rotate until the rotating speed of the first compressor reaches a preset rotating speed, enabling a pressure ratio to reach a preset pressure ratio (for example, 3-4 times the pressure ratio), and controlling the first generator to switch to a power generation working mode;
And switching a second generator in the supercritical fluid circulation subsystem to a motor mode, dragging a second turbine to rotate until the second compressor can output supercritical fluid with a preset pressure ratio (for example, 2-3 times the pressure ratio), and then controlling the second generator to switch to a power generation working mode.
The working principle of the gas turbine subsystem is that air is used as working medium, the first air compressor sucks air from the external atmospheric environment and compresses the air, the compressed air is sent to a combustion chamber to be mixed with fuel for combustion to generate high-temperature and high-pressure gas, the high-temperature and high-pressure gas (about 900 ℃) pushes a first turbine to rotate for acting, and then the first turbine is driven to work for generating electricity, and tail gas (about 650 ℃) discharged by the first turbine enters a first heat exchanger for heat exchange, so that the waste heat of the tail gas of the gas turbine is recycled. The working principle of the supercritical fluid circulation subsystem is that the supercritical fluid (supercritical carbon dioxide, supercritical water and the like) is used as working medium, the second compressor compresses the supercritical fluid, then heat exchange is carried out at the first heat exchanger, namely, the exhaust gas of the gas turbine subsystem is utilized to preheat the supercritical fluid compressed by the compressor (the temperature of the exhaust gas of the first turbine is higher than that of the supercritical fluid, so that the heat of the exhaust gas of the turbine is conducted to the supercritical fluid after heat exchange), the expansion acting effect of the supercritical fluid is improved, the supercritical fluid (high temperature and high pressure) after heat exchange pushes the second turbine to rotate to do work, the second generator is driven to work and generate electricity, and the exhaust gas discharged by the second turbine is cooled by the second heat exchanger and then flows to the second compressor to prepare for compression, so that the circulation of the supercritical fluid is formed. In the initial stage of supercritical fluid circulation, similar to the starting of a gas turbine, motor dragging is also required, for example, in this stage, the second generator can be controlled to work in a motor mode, and the second turbine and the second compressor which are coaxially arranged are dragged until the second compressor and the second turbine can establish autonomous power circulation, and then the second generator is controlled to switch to a generator working mode.
The supercritical fluid and gas turbine combined cycle system can utilize the exhaust waste heat of the gas turbine subsystem to heat the supercritical fluid of the supercritical fluid circulating subsystem so as to improve the expansion work efficiency of the supercritical fluid, further realize the combined cycle of the gas turbine and the supercritical fluid and improve the thermal efficiency of the gas turbine system. The high-temperature supercritical fluid discharged from the second turbine is guided to the second heat exchanger through the guide cover to exchange heat, so that the temperature of the supercritical fluid is reduced before the supercritical fluid enters the second compressor, the air compressing effect of the second compressor is improved, and the overall efficiency of the system is improved. The rotor system in the supercritical fluid circulation subsystem can be arranged into a special generator pair-trailing structure, which is beneficial to improving the power generation efficiency.
The various terms and phrases used herein have the ordinary meaning known to those skilled in the art. The terms and phrases used herein are not to be construed and interpreted to have a meaning consistent with the meaning of the terms and phrases in accordance with the present invention.
Drawings
FIG. 1 is a schematic diagram of a combined cycle system of critical fluid and gas turbine (example 1).
FIG. 2 is a schematic diagram of a combined cycle system of critical fluid and gas turbine (example 1).
FIG. 3 is a schematic diagram of the rotor system of the supercritical fluid circulation subsystem (example 3).
FIG. 4 is a schematic diagram of the rotor system of the supercritical fluid circulation subsystem (example 3).
FIG. 5 is a schematic diagram of the rotor system of the supercritical fluid circulation subsystem (example 4).
FIG. 6 is a schematic diagram of the rotor system of the supercritical fluid circulation subsystem (example 5).
FIG. 7 is a schematic diagram of the rotor system of the supercritical fluid circulation subsystem (example 6).
FIG. 8 is a schematic diagram of the rotor system of the supercritical fluid circulation subsystem (example 7).
FIG. 9 is a schematic diagram of the rotor system of the supercritical fluid circulation subsystem (example 8).
FIG. 10 is a schematic diagram of the rotor system of the supercritical fluid circulation subsystem (example 9).
FIG. 11 is a schematic diagram of the rotor system of the supercritical fluid circulation subsystem (example 10).
FIG. 12 is a schematic diagram of the rotor system of the supercritical fluid circulation subsystem (example 11).
Note that fig. 4 to 12 show only the structure on the left side of the second turbine, the structure on the right side of the second turbine is not shown, and the structure on the right side of the second turbine and the structure on the left side of the second compressor shown in the drawings are symmetrical structures.
1, A gas turbine subsystem; 2, a supercritical fluid circulation subsystem, 3, a first compressor, 4, a combustion chamber, 5, a first turbine, 6, a first generator, 7, a first heat exchanger, 8, a second heat exchanger, 9, a second generator, 10, a sealed box, 11, a guide cover, 100, a rotating shaft, 200, a turbine, 300, a compressor, 400, a generator A, 401, a generator B, 500, a first radial bearing, 600, a second radial bearing, 700, a first thrust bearing, 800, a fourth radial bearing, 801, a sixth radial bearing, 900, a second thrust bearing, 1000, a third radial bearing.
Detailed Description
The invention is further illustrated below with reference to examples. However, the scope of the present invention is not limited to the following examples. Those skilled in the art will appreciate that various changes and modifications can be made to the invention without departing from the spirit and scope thereof.
Example 1 supercritical fluid and gas turbine Combined cycle System
Comprises a gas turbine subsystem 1 and a supercritical fluid circulation subsystem 2, wherein the gas turbine subsystem 1 and the supercritical fluid circulation subsystem 2 are mutually independent, the gas turbine subsystem 1 comprises a first gas compressor 3, a combustion chamber 4, a first turbine 5 and a first generator 6, the supercritical fluid circulation subsystem 2 comprises a rotor system, a first heat exchanger 7 and a second heat exchanger 8,
The first compressor 3, the first turbine 5 and the first generator 6 in the gas turbine subsystem 1 are coaxially arranged, the exhaust end of the first compressor 3 is communicated with the air inlet end of the combustion chamber 4, the air outlet end of the combustion chamber 4 is communicated with the air inlet end of the first turbine 5, and the air outlet end of the first turbine 5 is communicated with the inlet end of the first passage of the first heat exchanger 7;
the rotor system in the supercritical fluid circulation subsystem 2 comprises a second compressor 300, a second turbine 200 and a second generator 9 which are coaxially arranged, wherein the outlet end of the second compressor 300 is communicated with the inlet end of the second passage of the first heat exchanger 7, the outlet end of the second passage of the first heat exchanger 7 is communicated with the inlet end of the second turbine 200, and the outlet end of the second turbine 200 is communicated with the inlet end of the second heat exchanger 8.
The supercritical fluid circulation subsystem 2 may further include a supercritical fluid storage tank for providing supercritical fluid at an initial stage or when pressurization is required, an outlet end of the supercritical fluid storage tank being in communication with an inlet end of the second compressor 300.
An outlet end of the supercritical fluid storage tank may be provided with an electromagnetic valve to control the opening and closing of the supercritical fluid storage tank.
The supercritical fluid circulation subsystem 2 is disposed in a sealed box 10, the sealed box 10 is filled with supercritical fluid and has a pressure of 7-10 mpa, the outlet end of the second passage of the second heat exchanger 8 is communicated with the inlet end of the second compressor 300 (as shown in fig. 1), or the outlet end of the second heat exchanger 8 is directly communicated with the interior of the sealed box 10 (as shown in fig. 2) (the supercritical fluid in the circulation pipeline can be directly discharged into the sealed box 10), and the inlet end of the second compressor 300 is also directly communicated with the interior of the sealed box 10 (i.e. the supercritical fluid entering the second compressor 300, a part of the supercritical fluid comes from the circulation pipeline, and a part of the supercritical fluid comes from the interior of the sealed box 10).
The sealed box 10 may also be provided with a booster pump, which is communicated with the supercritical fluid storage tank (may be located at an outlet of the supercritical fluid storage tank), and may be used to supply pressurized supercritical fluid to the supercritical fluid circulation flow channel pipeline by using the supercritical fluid storage tank as a supercritical fluid source if necessary, or may be controllably communicated with the sealed box external pipeline to supplement gas from the sealed box external environment to pressurize the sealed box internal environment if necessary.
The outlet end of the second turbine 200 of the supercritical fluid circulation subsystem 2 is provided with a flow guide cover 11 (for protecting the generator from being blown by the high temperature supercritical fluid, from being corroded or causing other problems) for guiding the working medium discharged from the outlet end of the second turbine 200 to the second heat exchanger 8.
The rotor system of the supercritical fluid circulation subsystem 2 can be set to be a generator pair-driven structure so as to improve the power generation efficiency (the rotating speed of the rotor system driven by the supercritical fluid circulation can reach 10-20 w RPM).
The supercritical fluid circulation subsystem 2 further comprises a fluid bearing, and a supporting medium of the fluid bearing is a supercritical fluid in a sealed box body. The fluid bearing is a dynamic pressure fluid bearing or a dynamic and static pressure integrated bearing. When the dynamic pressure bearing (i.e., by rotating and suspending) is selected (the structure of the dynamic pressure bearing can be referred to as CN 211343734U, CN 211343700U), the film layer can be formed by the supercritical fluid, and the supercritical fluid has a higher density than air and better fluidity than the liquid, so that better film layer rigidity can be provided, the rotation stability of the rotor system is improved, and the improvement of the rotation speed of the rotor is facilitated (the rotation speed of the rotor system for the supercritical fluid circulation is required to be higher than the rotation speed of the combustion engine).
The fluid bearing includes at least one radial bearing and at least one thrust bearing.
The second heat exchanger 8 may be an air-cooled heat exchanger.
The components (the first heat exchanger 7, the second heat exchanger 8, the second compressor 300, the second turbine 200, the guide cover 11, the pipelines used for communication, etc.) involved in the supercritical fluid circulation subsystem 2 may be subjected to corrosion prevention treatment (such as corrosion prevention coating, corrosion prevention material, etc.), because the ideal working temperature range of the supercritical fluid is 500-600 ℃, and the supercritical fluid has strong corrosiveness beyond the temperature range. The first compressor 3 and the first heat exchanger 7, the first heat exchanger 7 and the second turbine 200, and the pipelines between the second turbine 200 and the second heat exchanger 8 can be subjected to heat insulation treatment (heat preservation).
The pressure ratio of the second compressor 300 of the supercritical fluid circulation subsystem 2 may be set to 2-3 times.
The pressure ratio of the first compressor 3 of the gas turbine subsystem 1 may be set to 3 to 4 times.
Example 2 control method of Combined cycle System of supercritical fluid and gas turbine
Comprising the following steps:
the method comprises the steps of switching a first generator in a gas turbine subsystem to a motor mode for operation, dragging a first turbine to rotate until the rotating speed of the first compressor reaches a preset rotating speed, enabling a pressure ratio to reach a preset pressure ratio (for example, 3-4 times the pressure ratio), and controlling the first generator to switch to a power generation working mode;
And switching a second generator in the supercritical fluid circulation subsystem to a motor mode, dragging a second turbine to rotate until the second compressor can output supercritical fluid with a preset pressure ratio (for example, 2-3 times the pressure ratio), and then controlling the second generator to switch to a power generation working mode.
Example 3 supercritical fluid and gas turbine Combined cycle System
The rotor system of the supercritical fluid circulation subsystem has the same structure as that of embodiment 1, and includes a rotating shaft 100, and a first radial bearing 500, a first thrust bearing 700, a generator a 400, a second compressor 300, a second radial bearing 600, a second turbine 200, a generator B, a second thrust bearing, and a third radial bearing are sequentially disposed on the rotating shaft 100, as shown in fig. 3 and 4.
Example 4 supercritical fluid and gas turbine Combined cycle System
The rotor system of the supercritical fluid circulation subsystem has the same structure as that of embodiment 1, and includes a rotating shaft 100, and a first radial bearing 500, a generator a 400, a first thrust bearing 700, a second compressor 300, a second radial bearing 600, a second turbine 200, a second thrust bearing, a generator B, and a third radial bearing are sequentially disposed on the rotating shaft 100, as shown in fig. 5.
Example 5 supercritical fluid and gas turbine Combined cycle System
The rotor system of the supercritical fluid circulation subsystem has the same structure as that of embodiment 1, and includes a rotating shaft 100, and a first thrust bearing 700, a first radial bearing 500, a generator a 400, a second compressor 300, a second radial bearing 600, a second turbine 200, a generator B, a third radial bearing, and a second thrust bearing are sequentially disposed on the rotating shaft 100, as shown in fig. 6.
Example 6 supercritical fluid and gas turbine Combined cycle System
The rotor system of the supercritical fluid circulation subsystem has the same structure as that of embodiment 1, and includes a rotating shaft 100, and a first radial bearing 500, a first thrust bearing 700, a generator a 400, a fourth radial bearing 800, a second compressor 300, a second radial bearing 600, a second turbine 200, a fifth radial bearing, a generator B, a second thrust bearing, and a third radial bearing are sequentially disposed on the rotating shaft 100, as shown in fig. 7.
Example 7 supercritical fluid and gas turbine Combined cycle System
The rotor system of the supercritical fluid circulation subsystem has the same structure as that of embodiment 1, and includes a rotating shaft 100, and a first thrust bearing 700, a first radial bearing 500, a generator a 400, a fourth radial bearing 800, a second compressor 300, a second radial bearing 600, a second turbine 200, a fifth radial bearing, a generator B, a third radial bearing, and a second thrust bearing are sequentially disposed on the rotating shaft 100, as shown in fig. 8.
Example 8 supercritical fluid and gas turbine Combined cycle System
The rotor system of the supercritical fluid circulation subsystem has the same structure as that of embodiment 1, and includes a rotating shaft 100, and a first radial bearing 500, a generator a 400, a first thrust bearing 700, a fourth radial bearing 800, a second compressor 300, a second radial bearing 600, a second turbine 200, a fifth radial bearing, a second thrust bearing, a generator B, and a third radial bearing are sequentially disposed on the rotating shaft 100, as shown in fig. 9.
Example 9 supercritical fluid and gas turbine Combined cycle System
The rotor system of the supercritical fluid circulation subsystem has the same structure as that of embodiment 1, and includes a rotating shaft 100, and a first radial bearing 500, a generator a 400, a fourth radial bearing 800, a first thrust bearing 700, a second compressor 300, a second radial bearing 600, a second turbine 200, a second thrust bearing, a fifth radial bearing, a generator B, and a third radial bearing are sequentially disposed on the rotating shaft 100, as shown in fig. 10.
Example 10 supercritical fluid and gas turbine Combined cycle System
The rotor system of the supercritical fluid circulation subsystem has the same structure as that of embodiment 1, and includes a rotating shaft 100, and a first radial bearing 500, a generator a 400, a second compressor 300, a first thrust bearing 700, a second radial bearing 600, a second turbine 200, a sixth radial bearing 801, a generator B, and a third radial bearing are sequentially disposed on the rotating shaft 100, as shown in fig. 11.
Example 11 supercritical fluid and gas turbine Combined cycle System
The rotor system of the supercritical fluid circulation subsystem has the same structure as that of embodiment 1, and includes a rotating shaft 100, and a first radial bearing 500, a generator a 400, a fourth radial bearing 800, a second compressor 300, a first thrust bearing 700, a second radial bearing 600, a second turbine 200, a sixth radial bearing 801, a fifth radial bearing, a generator B, and a third radial bearing are sequentially disposed on the rotating shaft 100, as shown in fig. 12.
The foregoing examples are provided to fully disclose and describe how to make and use the claimed embodiments by those skilled in the art, and are not intended to limit the scope of the disclosure herein. Modifications that are obvious to a person skilled in the art will be within the scope of the appended claims.