CN115387867B - Power generation system and working medium loading method based on power generation system - Google Patents
Power generation system and working medium loading method based on power generation system Download PDFInfo
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- CN115387867B CN115387867B CN202211341853.2A CN202211341853A CN115387867B CN 115387867 B CN115387867 B CN 115387867B CN 202211341853 A CN202211341853 A CN 202211341853A CN 115387867 B CN115387867 B CN 115387867B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/18—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/003—Arrangements for measuring or testing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/103—Carbon dioxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/18—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
- F01K3/186—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters using electric heat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
Abstract
The application provides a power generation system and a working medium loading method based on the power generation system. The power generation system includes: the working medium input device is used for conveying working medium; the power generation circulation loop is connected with the working medium input device and comprises an input section, an energy conversion device and a backflow section which are connected in series, the input section comprises a heat source and a compression device, the backflow section comprises a cooling device, and the working medium converts heat energy into electric energy through the energy conversion device in the power generation circulation loop; and the temperature control device acts on the working medium in the working medium input stage and is used for heating the working medium. This application sets up temperature regulating device in power generation system, loads the stage at working medium, can heat the working medium that gets into power generation system through heat source and temperature regulating device in coordination, makes the working medium be heated the inflation, can effectively reduce the initial load capacity of working medium among the power generation system, has improved economic nature, has shortened the preparation cycle before the operation.
Description
Technical Field
The application relates to the technical field of power conversion, in particular to a power generation system and a working medium loading method of the power generation system.
Background
A power generation system for generating power by utilizing working medium circulation, such as a supercritical carbon dioxide power conversion system, has a novel power conversion technical concept with good application prospect. Before the power generation system operates, a large amount of working medium needs to be injected into the system, so that the pressure of the system reaches a preset value, for example, the supercritical carbon dioxide power conversion system is above the supercritical pressure.
In the prior art, a working medium storage tank is generally used for directly injecting working medium into a power generation system until the pressure of the system reaches a preset value, the initial loading capacity of the working medium is large, the preparation time before the system runs is long, and meanwhile, part of the working medium in the system needs to be unloaded due to the fact that the working medium expands when being heated in the temperature rising process of the system.
Disclosure of Invention
In view of the above problems, the present application provides a power generation system and a working medium loading method for the power generation system to effectively reduce the initial loading amount of the working medium in the power generation system, improve the economy, and shorten the preparation period before operation.
In one aspect, an embodiment of the present application provides a power generation system, including:
the working medium input device is used for conveying working medium; the power generation circulation loop is connected with the working medium input device and comprises an input section, an energy conversion device and a backflow section which are connected in series, the input section comprises a heat source and a compression device, the backflow section comprises a cooling device, and the working medium converts heat energy into electric energy through the energy conversion device in the power generation circulation loop; and the temperature control device acts on the working medium at the working medium input stage and is used for adjusting the temperature of the working medium.
Optionally, the temperature control device includes a first temperature control assembly, and the first temperature control assembly is disposed on the working medium input device and used for adjusting the temperature of the working medium before the working medium enters the power generation circulation loop.
Optionally, the temperature control device further includes a plurality of second temperature control assemblies dispersedly disposed in the power generation circulation loop.
Optionally, one of the plurality of second temperature control assemblies is disposed in the return section of the power generation circulation loop.
Optionally, the working medium input device comprises a working medium storage tank, a conveying pipeline and a first temperature control assembly, the working medium storage tank is used for inputting working medium to the conveying pipeline, and the first temperature control assembly is arranged on the conveying pipeline; the first temperature control assembly comprises a first detection part and a first heating part, the first detection part is used for detecting the temperature of the working medium in the conveying pipeline, and the heating part is used for heating the working medium in the conveying pipeline.
Optionally, the second temperature control device includes a second detection component and a second heating component, the second detection component is used for detecting the temperature of the pipe wall of the power generation circulation loop, and the second heating component is used for heating the working medium in the power generation circulation loop.
Optionally, the heating component includes at least one of a heating jacket or a heating wire sleeved on the pipeline of the power generation circulation loop.
On the other hand, an embodiment of the present application provides a working medium loading method based on the power generation system, including:
replacing the working medium, controlling the value range of the vacuum degree of the power generation system to be within 0kPa to 1kPa, starting the working medium input device to replace the substance in the power generation system to be the standby working medium, and enabling the temperature of the working medium entering the power generation circulation loop to be the temperature of the working mediumAbove its critical temperature value; loading working medium, keeping the working medium input device running, starting the temperature control device to make the value range of the pipe wall temperature of the power generation circulation loop be 150 o C~200 o C; starting a compression device and a heat source when the pressure in a pipeline of an input section of the power generation circulation loop meets a first preset value; and when the pressure in the pipeline of the power generation system meets a second preset value, finishing gas loading, wherein the first preset value is 20% -40% of the critical pressure of the working medium, and the second preset value is 75% -85% of the critical pressure of the working medium.
Optionally, in the working medium loading step, the initial rotating speed of the compression device is 20% -30% of the rated rotating speed, the initial heating power of the heat source is 5% -10% of the rated power, in the working medium loading stage, the rotating speed of the compression device is gradually increased to be 60% -80% of the rated rotating speed, and the heating power of the heat source is gradually increased to be 60% -80% of the rated power.
Optionally, the method further comprises the steps of adjusting the rotating speed of the compression device to be a rated rotating speed, adjusting the power of the heat source to be a rated power, starting the energy conversion device and the cooling device to enable the power generation system to start to operate, and adjusting the pressure of an inlet of the compression device in the power generation circulation loop to be 102% -110% of the critical pressure of the working medium
Compared with the prior art, the method has the following beneficial effects:
this application sets up temperature regulating device in power generation system, and at working medium loading stage, can heat the working medium that gets into among the power generation system through heat source and temperature regulating device in coordination, makes working medium thermal expansion, can effectively reduce the initial load capacity of working medium among the power generation system, has improved economic nature, has shortened the preparation cycle before the operation.
Drawings
Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings in which like or similar reference characters refer to the same or similar parts.
Fig. 1 is a first schematic structural diagram of a power generation system provided in an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a power generation system according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram three of a power generation system according to an embodiment of the present application.
The reference numbers in the detailed description are as follows:
the device comprises a working medium input device 10, a working medium storage tank 11, a conveying pipeline 12 and a power device 13;
a power generation circulation loop 20, a compression device 21, a heat source 22, an energy conversion device 23, a cooling device 24, a working medium detection port 25 and a vacuum pump 26;
a first temperature control assembly 31 and a second temperature control assembly 32.
Detailed Description
In order to make the application purpose, technical solution and beneficial technical effects of the present application clearer, the present application is further described in detail with reference to the following embodiments. It should be understood that the embodiments described in this specification are only for the purpose of explaining the present application and are not intended to limit the present application.
For the sake of brevity, only some numerical ranges are explicitly disclosed herein. However, any lower limit may be combined with any upper limit to form ranges not explicitly recited; and any lower limit may be combined with any other lower limit to form a range not explicitly recited, and any upper limit may be combined with any other upper limit to form a range not explicitly recited. Also, although not explicitly recited, each point or individual numerical value between the endpoints of a range is encompassed within that range. Thus, each point or individual value may, as its lower or upper limit, be combined with any other point or individual value or with other lower or upper limits to form ranges not explicitly recited.
The above summary of the present application is not intended to describe each disclosed embodiment or every implementation of the present application. The following description more particularly exemplifies illustrative embodiments. At various points throughout this application, guidance is provided through a list of embodiments that can be used in various combinations. In each instance, the list is merely a representative group and should not be construed as exhaustive.
The working medium is a working substance for realizing heat and power conversion, and is called the working medium for short. Various heat engines or thermal devices are used to implement medium substances for converting heat energy and mechanical energy into each other. Because the gaseous substance has good fluidity and expansibility, and has good expansibility and huge work capacity after being heated, the working medium used as various heat engines is basically gaseous or has phase-change liquid, such as air, fuel gas, water vapor, water, refrigerant and the like.
A power generation system for generating power by utilizing gaseous working medium circulation, such as a supercritical carbon dioxide power conversion system, has a novel power conversion technical concept with good application prospect. Before the power generation system operates, a large amount of working media needs to be injected into the system, so that the pressure of the system reaches a preset value, for example, the pressure of the system needs to be increased to be higher than the critical pressure (7.38 MPa) of carbon dioxide in a supercritical carbon dioxide power conversion system.
The inventor notices that in the prior art, the working medium storage tank is generally used for directly injecting the working medium into the power generation system until the pressure of the system reaches a preset value, the initial loading capacity of the working medium is large, the preparation time before the system operates is long, and meanwhile, part of the working medium in the system needs to be unloaded due to the fact that the working medium is heated and expanded in the temperature rising process of the system.
In view of the above problems, the present application provides a power generation system and a working medium loading method for the power generation system to effectively reduce the initial loading amount of the working medium in the power generation system, improve the economy, and shorten the preparation period before operation.
In one aspect, an embodiment of the present application provides a power generation system, which is described below, and includes:
the working medium input device 10 is used for conveying working medium; the power generation circulation loop 20 is connected to the working medium input device 10, the power generation circulation loop 20 comprises an input section, an energy conversion device 23 and a backflow section which are connected in series, the input section comprises a heat source 22 and a compression device 21, the backflow section comprises a cooling device 24, and the working medium converts heat energy into electric energy through the energy conversion device 23 in the power generation circulation loop 20; and the temperature control device acts on the working medium in the working medium input stage and is used for heating the working medium.
Specifically, in the working medium loading stage, the working medium conveying device 10 conveys the working medium to the power generation circulation loop 20 for temperature controlThe device is used for heating the working medium in the power generation system, and preferably, the working medium is heated to a temperature above a critical temperature. In the present embodiment, the working fluid may be supercritical carbon dioxide or other suitable fluid. Exemplarily, if the working fluid is CO 2 The temperature is heated to 40 deg.f o C~200 o C。
The power generation circulation loop 20 comprises an input section and a return section, a working medium flows in the power generation circulation loop 20 through the input section, the energy conversion device 23 and the return section, the input section comprises a heat source 22, and the heat source 22 can heat the working medium in the power generation circulation loop 20 to enable the working medium to be heated and expanded, so that the pressure of the power generation circulation loop 20 is increased.
In the embodiment of the present application, the energy conversion device 23 may be a turbine.
This application sets up temperature regulating device in power generation system, loads the stage at working medium, can heat the working medium that gets into power generation system through heat source and temperature regulating device in coordination, makes the working medium be heated the inflation, can effectively reduce the initial load capacity of working medium among the power generation system, has improved economic nature, has shortened the preparation cycle before the operation.
Fig. 1 to 3 are schematic structural diagrams of power generation systems provided in some embodiments of the present application, and in some embodiments of the present application, as shown in fig. 1 to 3, the temperature control device includes a first temperature control assembly 31, the first temperature control assembly is disposed on the working medium input device and is used for heating the working medium before the working medium enters the power generation circulation loop.
In some embodiments of the present application, please continue to refer to fig. 1-3, the temperature control device further includes a plurality of second temperature control assemblies 32 dispersedly disposed on the power generation circulation loop 20, and configured to further heat the working medium in the power generation circulation loop 20 at the working medium loading stage, so as to cooperatively raise the temperature of the working medium in the power generation circulation loop 20, which is beneficial to rapid thermal expansion of the working medium.
According to an embodiment of the present application, the second temperature control assembly 32 may be connected in series to the pipeline of the power generation circulation loop 20, or may be sleeved on the pipeline of the power generation circulation loop 20, which is not specifically limited herein.
In some embodiments of the present application, the plurality of second temperature control assemblies 32 are dispersedly disposed on at least one section of the input section or the return section of the power generation circulation loop 20, and the plurality of second temperature control assemblies 32 are dispersedly disposed, which is beneficial to the working medium in the power generation system to facilitate the working medium to be heated and expanded rapidly and uniformly.
According to the power generation system, the first temperature control assembly 31 is arranged in the working medium input device 10 of the power generation system, the second temperature control assembly 32 is arranged in the power generation circulation loop 20, and in a working medium loading stage, working media entering the power generation circulation loop 20 are heated through the cooperation of the heat source 22, the first temperature control device 13 and the second temperature control device, so that the working media are heated and expanded, the initial loading capacity of the working media in the power generation system can be effectively reduced, the economy is improved, and the preparation period before operation is shortened.
In some embodiments of the present application, the working medium input device 10 includes a working medium storage tank 11, a conveying pipeline 12 and a first temperature control assembly 31, the working medium enters the conveying pipeline 12 from the working medium storage tank 11, it can be understood that a power device 14 such as a pump is disposed in the working medium input device 10 for conveying the working medium, and the first temperature control assembly 31 is used for heating the working medium in the conveying pipeline 12.
Specifically, the first temperature control assembly 31 may be connected in series to the conveying pipeline 12, or may be sleeved on the conveying pipeline 12, for example, as shown in fig. 1, the first temperature control assembly 31 is connected in series to the conveying pipeline 12, and the working medium is input from one end of the first temperature control assembly 31 and output from the other end, so as to achieve the temperature rise effect of the working medium.
When the first temperature control assembly 31 is connected in series in the conveying pipeline 12, the positions of the first temperature control assembly 31 and the power device 14 are not specifically limited in the application, the power device 14 can be connected between the working medium storage tank 11 and the first temperature control assembly 31, or the first temperature control assembly 31 can be connected between the working medium storage tank 11 and the power device 14, the temperature control effect on the working medium can be achieved, and the heated working medium enters the power generation circulation loop 20 from the conveying pipeline 12.
In some alternative embodiments, first temperature control assembly 31 includes a first sensing component (not shown) for sensing the temperature of the working fluid in delivery conduit 12 and a first heating component (not shown) for heating the working fluid in delivery conduit 12.
Specifically, the first detection component and the first heating component of the first temperature control device 13 may exist independently, and may be electrically connected to each other, and preferably, the first detection component and the first heating component are electrically connected to each other, so that the power of the heating component is adjusted through the detection of the detection component on the temperature of the working medium in the conveying pipeline 12, and the control of the temperature of the working medium in the conveying pipeline 12 is realized.
In some alternative embodiments, the second temperature control assembly 32 includes a second detection component (not shown) for detecting the temperature of the tube wall of the power generation circulation loop 20 and a second heating component (not shown) for heating the working medium in the power generation circulation loop 20.
Specifically, the detection component and the heating component of the second temperature control assembly 32 may exist independently, and may be electrically connected to each other, and preferably, the detection component and the heating component are electrically connected to each other, so that the power of the heating component is adjusted through the detection of the detection component on the temperature of the working medium in the power generation circulation loop 20, thereby realizing the control on the temperature of the working medium in the power generation circulation loop 20.
In some alternative embodiments, the second temperature control assembly 32 is disposed around the input and return sections of the power generation cycle 20. Through being connected in parallel with the power generation circulation circuit 20, the interface setting in the power generation circulation circuit 20 can be reduced, and the risk of working medium leakage is reduced. In addition, the sleeving manner facilitates the realization of a larger contact area between the second temperature control device and the power generation circulation loop 20, and realizes the large-area heating of the working medium in the power generation circulation loop 20.
The embodiment of the present application does not limit the specific implementation manner of the heating element, the heating element may be an electric heating wire or a heating jacket, and in some optional embodiments, the heating element includes a heating jacket sleeved on the pipeline of the power generation circulation loop 20. The heating jacket can coat the power generation circulation loop 20, and is beneficial to uniformly heating the working medium in the power generation circulation loop 20.
On the other hand, the embodiment of the present application provides a working medium loading method based on the power generation system, including:
performing working medium replacement, controlling the value range of the vacuum degree of the power generation system to be within 0kPa to 1kPa, starting the working medium input device 10 to replace substances in the power generation system into a standby working medium, and enabling the temperature of the working medium entering the power generation circulation loop 20 to be higher than the critical temperature value;
loading working medium, keeping the working medium input device running, starting the temperature control device to make the value range of the pipe wall temperature of the power generation circulation loop 20 be 150 o C~200 o C; when the pressure in the pipeline at the input section of the power generation circulation loop 20 meets a first preset value, starting a compression device 21 and a heat source 22; and when the pressure in the pipeline of the power generation system meets a second preset value, completing gas loading, wherein the first preset value is 20% -40% of the critical pressure of the working medium, and the second preset value is 75% -85% of the critical pressure of the working medium.
In the embodiment of the present application, the method for controlling the vacuum degree of the power generation system may be to connect the vacuum pump 26 with the power generation circulation loop 20, and in the working medium replacement stage, the vacuum pump 26 is used to perform a vacuum pumping operation on the power generation circulation loop 20 to remove air in the power generation circulation loop 20, so as to ensure the purity of the working medium when the subsequent working medium is charged.
After the vacuum degree is met, the working medium input device 10 is started, the working medium in the conveying pipeline 12 is heated by the first temperature control assembly 31, the temperature of the working medium entering the power generation circulation loop 20 is higher than the critical temperature of the working medium, the working medium is heated and expanded, the pressure in the power generation system is increased, and the initial loading capacity of the working medium in the power generation system is favorably reduced. In some embodiments, heating the working fluid in the circuit of the power generation cycle loop 20 with the second temperature control assembly 32 is also included.
Illustratively, for the supercritical carbon dioxide working medium, when the pressure in the pipeline of the input section of the power generation circulation loop 20 meets a first preset value of 2000kPa to 2500kPa, the compression device 21 and the heat source 22 are started; and when the pressure in the pipeline of the power generation system meets a second preset value of 6000kPa to 6500kPa, finishing gas loading.
In some embodiments, in the working medium loading step, the initial rotating speed of the compression device is 20% -10% of the rated rotating speed, the initial heating power of the heat source is 5% -10% of the rated power, in the working medium loading stage, the rotating speed of the compression device is gradually increased to be 60% -80% of the rated rotating speed, and the heating power of the heat source is gradually increased to be 60% -80% of the rated power.
According to the embodiment of the application, the gradual increase of the power of the heat source is beneficial to the uniform increase of the temperature of the working medium, the input safety of the working medium can be improved, and the temperature and the pressure value of the working medium are easy to control.
The embodiment of the application sets up first temperature control assembly 31 in power generation system's working medium input device 10, set up second temperature control assembly device 32 in power generation circulation circuit 20, through first temperature control assembly 31, second temperature control assembly 32 and heat source 22 heat the working medium that gets into power generation circulation circuit 20 in coordination, make the working medium be heated and expand, can effectively reduce the initial load capacity of working medium among the power generation system, can shorten the intensification time of working medium in the power generation system simultaneously, improve working medium input efficiency, the economic nature has been improved, the preparation period before the operation has been shortened.
In some optional embodiments, the working medium loading method of the power generation system further includes adjusting the rotation speed of the compression device 21 to be a rated rotation speed, the heat source power 22 to be a rated power, starting the energy conversion device 23 and the cooling device 24 to start the power generation system to operate, detecting the pressure in the pipeline of the power generation system, and adjusting the pressure at the inlet of the compression device 21 in the power generation circulation loop 20 to be 102% -110% of the critical pressure of the working medium.
Specifically, after the power generation system starts to operate, the pressure in the power generation circulation loop 20 is detected, if the pressure is higher than 8500kPa, the working medium is partially discharged so as to meet the power generation requirement and the safety requirement of the power generation circulation system, and if the pressure is lower than the critical pressure of the working medium, the working medium is supplemented through the working medium input device.
In some alternative embodiments, the pipes of the power generation system are repeatedly flushed with the standby working fluid until the purity of the standby working fluid in the power generation circulation loop 20 reaches 99.95%. In the embodiment of the application, the working medium purity in the power generation circulation loop 20 is measured at the working medium detection port 25, and the higher purity is beneficial to accurately controlling the state of the working medium to reach the critical temperature and the critical pressure value.
It will be appreciated by persons skilled in the art that the above embodiments are illustrative and not restrictive. Different features which are present in different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art upon studying the drawings, the specification, and the claims. In the claims, the term "comprising" does not exclude other means or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to denote a name and not to denote any particular order. Any reference signs in the claims shall not be construed as limiting the scope. The functions of the various parts appearing in the claims may be implemented by a single hardware or software module. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
Claims (6)
1. A power generation system, comprising:
the working medium input device is used for conveying working medium;
the power generation circulation loop is connected to the working medium input device and comprises an input section, an energy conversion device and a backflow section which are connected in series, the input section comprises a heat source and a compression device, the backflow section comprises a cooling device, and the working medium converts heat energy into electric energy through the energy conversion device in the power generation circulation loop;
the temperature control device acts on the working medium in the working medium input stage and is used for adjusting the temperature of the working medium;
the temperature control device comprises a first temperature control assembly and a plurality of second temperature control assemblies, wherein the first temperature control assembly is arranged on the working medium input device and is used for adjusting the temperature of the working medium before the working medium enters the power generation circulation loop; the plurality of second temperature control assemblies are dispersedly arranged on the power generation circulation loop;
the second temperature control assembly comprises a second detection part and a second heating part, the second detection part is used for detecting the temperature of the pipe wall of the power generation circulation loop, and the second heating part is used for heating working media in the power generation circulation loop;
the second heating component comprises at least one of a heating sleeve or a heating wire sleeved on a pipeline of the power generation circulation loop.
2. The power generation system of claim 1, wherein one of the plurality of second temperature control assemblies is disposed in the return section of the power generation circulation loop.
3. The power generation system of claim 1, wherein the working medium input device comprises a working medium storage tank, a conveying pipeline and the first temperature control assembly, the working medium storage tank is used for inputting working medium to the conveying pipeline, and the first temperature control assembly is arranged on the conveying pipeline;
the first temperature control assembly comprises a first detection part and a first heating part, the first detection part is used for detecting the temperature of the working medium in the conveying pipeline, and the heating part is used for heating the working medium in the conveying pipeline.
4. A working medium loading method based on the power generation system of any one of claims 1 to 3, characterized by comprising the following steps:
performing working medium replacement, controlling the value range of the vacuum degree of the power generation system to be within 0kPa to 1kPa, starting the working medium input device to replace substances in the power generation system into a standby working medium, wherein the temperature of the working medium entering the power generation circulation loop is higher than the critical temperature value of the working medium;
loading working medium, keeping the working medium input device running, and starting the temperature control device to enable the value range of the pipe wall temperature of the power generation circulation loop to be 150 o C~200 o C; when the pressure in the pipeline of the input section of the power generation circulation loop meets the first preset pressureWhen setting the value, starting the compression device and the heat source; and when the pressure in the pipeline of the power generation system meets a second preset value, finishing gas loading, wherein the first preset value is 20-40% of the critical pressure of the working medium, and the second preset value is 75-85% of the critical pressure of the working medium.
5. The working medium loading method of the power generation system according to claim 4, wherein in the working medium loading step, the initial rotating speed of the compression device is 20% -30% of the rated rotating speed, the initial heating power of the heat source is 5% -10% of the rated power, in the working medium loading stage, the rotating speed of the compression device is gradually increased to be 60% -80% of the rated rotating speed, and the heating power of the heat source is gradually increased to be 60% -80% of the rated power.
6. The working medium loading method for the power generation system according to claim 4, further comprising adjusting the rotation speed of the compression device to a rated rotation speed, adjusting the power of the heat source to a rated power, starting the energy conversion device and the cooling device to start the power generation system to operate, and adjusting the pressure at the inlet of the compression device in the power generation circulation loop to be 102% -110% of the critical pressure of the working medium.
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| CN109098803A (en) * | 2018-09-13 | 2018-12-28 | 中国核动力研究设计院 | Heat stepped utilization method and its system based on supercritical carbon dioxide |
| CN115059526A (en) * | 2022-08-17 | 2022-09-16 | 中国核动力研究设计院 | Recompression Brayton cycle system and start-up method |
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| CN204738850U (en) * | 2015-06-10 | 2015-11-04 | 中国长江动力集团有限公司 | Quick safe device of maring of organic working medium of ORC power generation system |
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| GB2575310B (en) * | 2018-07-06 | 2020-10-07 | Basic Holdings | Distributed heating and cooling network |
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| CN110940087A (en) * | 2019-12-30 | 2020-03-31 | 王玉才 | Working medium heating device for machinery and hydraulic equipment |
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| CN114810252A (en) * | 2022-04-06 | 2022-07-29 | 西安热工研究院有限公司 | Supercritical CO 2 Variable-load working medium charging and discharging system and method for generator set |
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| CN109098803A (en) * | 2018-09-13 | 2018-12-28 | 中国核动力研究设计院 | Heat stepped utilization method and its system based on supercritical carbon dioxide |
| CN115059526A (en) * | 2022-08-17 | 2022-09-16 | 中国核动力研究设计院 | Recompression Brayton cycle system and start-up method |
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