CN116025547A - Tower-groove combined photo-thermal composite compressed air energy storage system - Google Patents
Tower-groove combined photo-thermal composite compressed air energy storage system Download PDFInfo
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- 238000007906 compression Methods 0.000 claims abstract description 104
- 230000006835 compression Effects 0.000 claims abstract description 103
- 238000010248 power generation Methods 0.000 claims abstract description 14
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- 238000005516 engineering process Methods 0.000 description 24
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- 238000010521 absorption reaction Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 238000005338 heat storage Methods 0.000 description 3
- 238000005381 potential energy Methods 0.000 description 3
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- 238000010438 heat treatment Methods 0.000 description 1
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- Y02E10/00—Energy generation through renewable energy sources
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- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
Abstract
The invention discloses a tower-tank combined photo-thermal composite compressed air energy storage system, which relates to the technical field of energy storage and comprises the following components: the air compression branch is formed by sequentially connecting a compressor, a compression side heat exchanger and gas storage equipment in series; the air expansion branch is formed by sequentially connecting a gas storage device, an expansion side preheater, an expansion side reheater and an expander in series; the compression heat cycle is formed by serially connecting a compression heat low-temperature working medium storage tank, a compression side heat exchanger, a compression heat high-temperature working medium storage tank and an expansion side preheater end to end; the groove type heat collection power generation cycle is formed by connecting a compression heat high-temperature working medium storage tank, a groove type heat collection field, a groove type heat collection high-temperature working medium storage tank and a Rankine cycle device in series end to end; the tower type heat collection circulation is formed by connecting a tower type heat collection low-temperature working medium storage tank, a tower type heat collector, a tower type heat collection high-temperature working medium storage tank and an expansion side reheater in series. The system uses the compressed air energy storage in the aspects of absorbing and utilizing clean heat energy such as geothermal energy, solar energy photo-thermal energy and the like.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to a tower-tank combined photo-thermal composite compressed air energy storage system.
Background
In the prior art, energy storage is an important supporting technology for new energy consumption and energy transformation. As a novel physical energy storage technology, the compressed air energy storage has the advantages of low dependence on geographical conditions, long service life, large scale and the like. The compressed air energy storage technology which has been proved by engineering practice at present is two types, namely a post-combustion type system, wherein the system stores high-pressure air in air storage equipment by utilizing a compressor when energy is stored, and the high-pressure air stored in the air storage equipment generates electricity by pushing an expander when energy is released, so that the power generation power is improved, and the post-combustion type technology greatly improves the air inlet temperature of the expander by combusting natural gas; the other is a non-afterburning system, and the heat source used for heating the inlet air temperature of the expander in the technology is from the compression heat recovered in the compression process, so that the carbon-free emission can be completely cleaned.
While compressed air energy storage has the advantages described above, non-afterburned compressed air energy storage is not free of liftable space. From the system performance perspective, since the expansion process adopts the recovered compression heat, the compressor power consumption in energy storage and the expander output in energy release are mutually restricted, and the pursuit of low power consumption can lead to the low grade of the compression heat to reduce the expander output, and vice versa. From the aspect of the system for the consumption of clean energy, the non-afterburning compressed air energy storage has great potential in the aspects of consuming and utilizing geothermal energy, solar photo-thermal energy and other clean heat energy because the compression side and the expansion side respectively comprise a heat energy interface.
In summary, how to use the compressed air energy storage to absorb and utilize the geothermal energy, solar photo-thermal energy and other clean heat energy is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention aims to provide a combined photo-thermal compressed air energy storage system with a tower-tank combination, which can fully use the compressed air energy storage in the aspect of absorbing and utilizing clean heat energy such as geothermal energy, solar photo-thermal energy, etc.
In order to achieve the above object, the present invention provides the following technical solutions:
a tower-tank combined photo-thermal composite compressed air energy storage system comprising:
the air compression branch is formed by sequentially connecting a compressor, a compression side heat exchanger and gas storage equipment in series;
the air expansion branch is formed by sequentially connecting the gas storage equipment, the expansion side preheater, the expansion side reheater and the expander in series;
the compression heat cycle is formed by connecting a compression heat low-temperature working medium storage tank, the compression side heat exchanger, the compression heat high-temperature working medium storage tank and the expansion side preheater in series end to end;
the groove type heat collection power generation cycle is formed by connecting the compression heat high-temperature working medium storage tank, the groove type heat collection field, the groove type heat collection high-temperature working medium storage tank and the Rankine cycle device in series end to end;
the tower type heat collection circulation is formed by connecting a tower type heat collection low-temperature working medium storage tank, a tower type heat collector, a tower type heat collection high-temperature working medium storage tank and the expansion side reheater in series end to end.
Preferably, a compression heat low-temperature working medium pump is arranged between the compression heat low-temperature working medium storage tank and the compression side heat exchanger, and a compression heat high-temperature working medium pump is arranged between the compression heat high-temperature working medium storage tank and the expansion side preheater.
Preferably, a groove type heat collection field working medium pump is arranged between the compression heat high-temperature working medium storage tank and the groove type heat collection field, and a groove type heat collection high-temperature working medium pump is arranged between the groove type heat collection high-temperature working medium storage tank and the Rankine cycle device.
Preferably, a tower type heat collection working medium pump is arranged between the tower type heat collection low-temperature working medium storage tank and the tower type heat collector, and a tower type heat collection high-temperature working medium pump is arranged between the tower type heat collection high-temperature working medium storage tank and the expansion side reheater.
Preferably, the two sides of the tower-type heat collector are symmetrically provided with fixed eyepiece fields for reflecting solar energy.
Preferably, the compressor is connected to an electric motor, and the expander is connected to an electric generator.
Preferably, the working media of the compression thermal cycle and the groove type heat collection power generation cycle are heat conduction oil, and the working media of the tower type heat collection cycle are molten salt.
Preferably, the compressor and the compression side heat exchanger are sequentially connected in series to form a first branch, and a plurality of first branches are connected with the gas storage device to form the air compression branch;
the expansion side preheater, the expansion side reheater and the expansion machine are sequentially connected in series to form a second branch, and a plurality of second branches are connected with the gas storage equipment to form the air expansion branch.
When the tower-tank combined photo-thermal composite compressed air energy storage system provided by the invention is used, the compressor, the compression side heat exchanger, the gas storage equipment, the compression heat low-temperature working medium storage tank and the compression heat high-temperature working medium storage tank jointly complete decoupling of valley electricity or photovoltaic output into air pressure energy release and heat energy storage.
The compressed heat high-temperature working medium storage tank, the groove type heat collection field and the groove type heat collection high-temperature working medium storage tank store solar photo-heat by using a groove type heat collection technology, and the tower type heat collection low-temperature working medium storage tank, the tower type heat collector and the tower type heat collection high-temperature working medium storage tank store solar photo-heat by using a tower type heat collection technology.
The groove type heat collection high-temperature working medium storage tank, the Rankine cycle device and the compression heat high-temperature working medium storage tank jointly convert solar energy into electric energy for output;
the air pressure potential energy and the solar photo-thermal energy are converted into electric energy to be output together by the air storage device, the expansion side preheater, the expansion side reheater, the expansion machine, the tower type heat collection high-temperature working medium storage tank and the tower type heat collection low-temperature working medium storage tank.
The system fully combines the advantages of three technologies of compressed air energy storage, groove type solar heat collection and tower type solar heat collection, and has the following advantages while realizing the basic function of compressed air energy storage. Firstly, the system fully expands the energy interface of the general non-afterburning compressed air energy storage technology, and greatly enhances the further absorption of the renewable energy sources by the compressed air energy storage technology through respectively introducing a groove type solar heat collection system and a tower type heat collection system at the compression side and the expansion side; secondly, the system greatly improves the grade of compression heat and expansion heat through a solar heat collection technology, so that the temperature of the compression heat is increased to be capable of driving Rankine cycle to generate power, and the economy of the system is greatly improved; in addition, the operation of each device in the system can fully consider the peak-valley electricity price and the fluctuation of solar energy, so that the system has higher economy when being used for peak clipping and valley filling, and can successfully smooth the fluctuation output when being used for absorbing solar energy; finally, three technologies (non-afterburning compressed air energy storage, trough heat collection and tower heat collection) integrated by the system are successful in realizing commercial operation, and the system can be ensured to be realized smoothly.
In summary, the tower-tank combined photo-thermal composite compressed air energy storage system provided by the invention can fully utilize the compressed air energy storage in the aspects of absorbing and utilizing clean heat energy such as geothermal energy, solar photo-thermal energy and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a tower-tank combined photo-thermal composite compressed air energy storage system provided by the invention.
In fig. 1:
the heat-collecting system comprises a compressor 1, a compression side heat exchanger 2, a gas storage device 3, an expansion side preheater 4, an expansion side reheater 5, an expander 6, a compression heat low-temperature working medium storage tank 7, a compression heat low-temperature working medium pump 8, a compression heat high-temperature working medium storage tank 9, a compression heat high-temperature working medium pump 10, a groove type heat-collecting field working medium pump 11, a groove type heat-collecting field 12, a groove type heat-collecting high-temperature working medium storage tank 13, a groove type heat-collecting high-temperature working medium pump 14, a Rankine cycle device 15, a tower type heat-collecting low-temperature working medium storage tank 16, a tower type heat-collecting working medium pump 17, a tower type heat collector 18, a heliostat field 19, a tower type heat-collecting working medium high-temperature storage tank 20 and a tower type heat-collecting high-temperature working medium pump 21.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a tower-tank combined photo-thermal composite compressed air energy storage system, which can fully utilize compressed air energy storage in the aspects of absorbing and utilizing clean heat energy such as geothermal energy, solar photo-thermal energy and the like.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a tower-tank combined photo-thermal composite compressed air energy storage system according to the present invention.
The embodiment provides a photo-thermal composite compressed air energy storage system with a tower-tank combination, which comprises:
the air compression branch is formed by sequentially connecting a compressor 1, a compression side heat exchanger 2 and a gas storage device 3 in series;
an air expansion branch, which is formed by sequentially connecting a gas storage device 3, an expansion side preheater 4, an expansion side reheater 5 and an expander 6 in series;
the compression heat cycle is formed by serially connecting a compression heat low-temperature working medium storage tank 7, a compression side heat exchanger 2, a compression heat high-temperature working medium storage tank 9 and an expansion side preheater 4 end to end;
the groove type heat collection power generation cycle is formed by connecting a compression heat high-temperature working medium storage tank 9, a groove type heat collection field 12, a groove type heat collection high-temperature working medium storage tank 13 and a Rankine cycle device 15 in series end to end;
the tower type heat collection circulation is formed by connecting a tower type heat collection low-temperature working medium storage tank 16, a tower type heat collector 18, a tower type heat collection high-temperature working medium storage tank 20 and an expansion side reheater 5 in series.
When the tower-tank combined photo-thermal composite compressed air energy storage system provided by the invention is used, the compressor 1, the compression side heat exchanger 2, the gas storage device 3, the compression heat low-temperature working medium storage tank 7 and the compression heat high-temperature working medium storage tank 9 jointly complete decoupling of valley electricity or photovoltaic output into air pressure energy release and heat energy storage.
The compressed heat high temperature working medium storage tank 9, the trough type heat collection field 12 and the trough type heat collection high temperature working medium storage tank 13 store solar photo-heat by a trough type heat collection technology, and the tower type heat collection low temperature working medium storage tank 16, the tower type heat collector 18 and the tower type heat collection high temperature working medium storage tank 20 store solar photo-heat by a tower type heat collection technology.
The groove type heat collection high-temperature working medium storage tank 13, the Rankine cycle device 15 and the compression heat high-temperature working medium storage tank 9 jointly convert solar energy into electric energy for output;
the air storage device 3, the expansion side preheater 4, the expansion side reheater 5, the expansion machine 6, the tower type heat collection high-temperature working medium storage tank 20 and the tower type heat collection low-temperature working medium storage tank 16 jointly convert air pressure potential energy and solar energy photo-thermal into electric energy to be output.
The system fully combines the advantages of three technologies of compressed air energy storage, groove type solar heat collection and tower type solar heat collection, and has the following advantages while realizing the basic function of compressed air energy storage. Firstly, the system fully expands the energy interface of the general non-afterburning compressed air energy storage technology, and greatly enhances the further absorption of the renewable energy sources by the compressed air energy storage technology through respectively introducing a groove type solar heat collection system and a tower type heat collection system at the compression side and the expansion side; secondly, the system greatly improves the grade of compression heat and expansion heat through a solar heat collection technology, so that the temperature of the compression heat is increased to be capable of driving Rankine cycle to generate power, and the economy of the system is greatly improved; in addition, the operation of each device in the system can fully consider the peak-valley electricity price and the fluctuation of solar energy, so that the system has higher economy when being used for peak clipping and valley filling, and can successfully smooth the fluctuation output when being used for absorbing solar energy; finally, three technologies (non-afterburning compressed air energy storage, trough heat collection and tower heat collection) integrated by the system are successful in realizing commercial operation, and the system can be ensured to be realized smoothly.
In summary, the tower-tank combined photo-thermal composite compressed air energy storage system provided by the invention can fully utilize the compressed air energy storage in the aspects of absorbing and utilizing clean heat energy such as geothermal energy, solar photo-thermal energy and the like.
On the basis of the above embodiment, it is preferable that a compression heat low-temperature working medium pump 8 is provided between the compression heat low-temperature working medium storage tank 7 and the compression side heat exchanger 2, and a compression heat high-temperature working medium pump 10 is provided between the compression heat high-temperature working medium storage tank 9 and the expansion side preheater 4. Namely, the compression heat circulation is formed by serially connecting the compression heat low-temperature working medium storage tank 7, the compression heat low-temperature working medium pump 8, the compression side heat exchanger 2, the compression heat high-temperature working medium storage tank 9, the compression heat high-temperature working medium pump 10 and the expansion side preheater 4.
Preferably, a groove type heat collection field working medium pump 11 is arranged between the compression heat high-temperature working medium storage tank 9 and the groove type heat collection field 12, and a groove type heat collection high-temperature working medium pump 14 is arranged between the groove type heat collection high-temperature working medium storage tank 13 and the Rankine cycle device 15. Namely, the compressed heat high-temperature working medium storage tank 9, the groove type heat collection field working medium pump 11, the groove type heat collection field 12, the groove type heat collection high-temperature storage tank 13, the groove type heat collection high-temperature working medium pump 14 and the Rankine cycle device 15 are connected in series to form the groove type heat collection power generation cycle.
Preferably, a tower heat collection working medium pump 17 is arranged between the tower heat collection low-temperature working medium storage tank 16 and the tower heat collector 18, and a tower heat collection high-temperature working medium pump 21 is arranged between the tower heat collection high-temperature working medium storage tank 20 and the expansion side reheater 5. Namely, a tower heat collection circulation formed by sequentially connecting the tower heat collection low-temperature working medium storage tank 16, the tower heat collection low-temperature pump 17, the tower heat collector 18, the tower heat collection low-temperature working medium storage tank 20, the tower heat collection high-temperature pump 21 and the expansion side reheater 5 in series.
On the basis of the above embodiment, it is preferable that heliostat fields 19 for reflecting solar energy are symmetrically provided on both sides of the tower collector 18. Therefore, the tower heat collection low-temperature working medium stored in the tower heat collection low-temperature working medium storage tank 16 flows into the tower heat collector 18 under the action of the tower heat collection low-temperature pump 17 to absorb solar energy reflected by the heliostat field 19, and the working medium is stored in the tower heat collection low-temperature working medium storage tank 20 after being heated to the maximum allowable temperature (typically 580 ℃).
Preferably, the compressor 1 is connected to an electric motor, and the expander 6 is connected to an electric generator. I.e. the compressor 1 may be driven by an electric motor and the expander 6 may drive an electric generator. The compressor 1 may be driven by other mechanisms, and the expander may drive other mechanisms to operate.
Preferably, the working media of the compression thermal cycle and the groove type heat collection power generation cycle are heat conduction oil, and the working media of the tower type heat collection cycle are molten salt.
It should be noted that, the system starts from the actual requirement of saving work on the compression side and doing more work on the expansion side, fully utilizes the allowable temperature interval of the heat-conducting oil and the molten salt which are two main heat-storing working mediums at present, and gets rid of the mutual restriction between the compression heat and the expansion heat in the general non-afterburning type compressed air energy storage system.
Preferably, the compressor 1 and the compression side heat exchanger 2 are sequentially connected in series to form a first branch, and a plurality of first branches are connected with the gas storage device 3 to form an air compression branch;
the expansion side preheater 4, the expansion side reheater 5 and the expander 6 are sequentially connected in series to form a second branch, and a plurality of second branches are connected with the gas storage device 3 to form an air expansion branch.
In order to further illustrate the combined column-tank photo-thermal compressed air energy storage system provided by the present invention, it is illustrated below.
Embodiment one: peak clipping and valley filling application scene of tower-tank combined photo-thermal composite compressed air energy storage system.
Valley fill period at night 00:00 to 8 in the morning: 00, the system of this moment stores the valley electrolytic coupling as air pressure potential energy and heat energy, and the implementation steps are: the compressor 1 is operated under the low-valley electric drive, and sucks in ambient air and compresses the ambient air into high-temperature and high-pressure air; the high-temperature high-pressure air is taken as hot fluid to enter the compression side heat exchanger 2 for heat release, meanwhile, the compression heat low-temperature working medium in the compression heat low-temperature working medium storage tank 7 is driven by the compression heat low-temperature working medium pump 8 to be taken as cold fluid to enter the compression side heat exchanger 2 for heat absorption, the compressed air continues to flow downwards after being cooled, and the compression heat working medium absorbs heat and is heated and then enters the compression heat high-temperature working medium storage tank 9 for storage for standby.
The photo-thermal heat collection process can be performed in a period of time when the solar irradiation resource is excellent in daytime. For the groove type heat collection and heat storage process, the compressed heat high-temperature working medium stored in the compressed heat high-temperature working medium storage tank 9 enters the groove type heat collection field 12 under the action of the groove type heat collection field working medium pump 11 to absorb heat and raise temperature, and then is stored in the groove type heat collection high-temperature working medium storage tank 13, and at the moment, the working medium reaches the highest allowable temperature (usually 393 ℃).
For the tower heat collection and heat storage process, the tower heat collection low-temperature working medium of the tower heat collection low-temperature working medium storage tank 16 flows into the tower heat collector 18 under the action of the tower heat collection working medium pump 17 to absorb solar energy reflected by the heliostat field 19, and the working medium is stored in the storage tank 20 after being heated to the highest allowable temperature (usually 580 ℃).
Peak clipping period at night 18:00 to 23 a.m.: 00, at this time, the system has two ways to generate power. Firstly, generating electricity through a Rankine cycle device 15, namely, working medium stored in a groove type heat collection high-temperature working medium storage tank 13 in the daytime flows into the Rankine cycle device 15 to provide a heat source for the Rankine cycle device and generate electricity under the driving of a groove type heat collection high-temperature working medium pump 14, and the working medium after heat release and temperature reduction flows into a compression heat high-temperature working medium storage tank 9;
the second step is to generate electricity through air expansion, namely, the high-pressure air stored in the air storage device 3 in the valley filling period is firstly used as cold fluid to flow into the expansion side preheater 4 to absorb heat, meanwhile, the working medium stored in the compression heat high-temperature working medium storage tank 9 is used as hot fluid to flow into the expansion side preheater 4 to release heat under the driving of the compression heat high-temperature working medium pump 10 after providing a heat source for the Rankine cycle device 15, then the working medium flows into the compression heat low-temperature working medium storage tank 7 to wait for the next valley filling process, the preheated air is continuously used as cold fluid to flow into the expansion side reheater 5 to absorb heat, meanwhile, the tower heat collection high-temperature working medium stored in the tower heat collection high-temperature working medium storage tank 20 in daytime is used as hot fluid to flow into the expansion side reheater 5 to release heat under the driving of the tower heat collection high-temperature working medium pump 21, then flows into the tower heat collection low-temperature working medium storage tank 16 to wait for the next heat collection, the reheated air flows into the expansion machine 6 to push the expansion machine to do work to generate electricity, and finally the air is discharged into the atmosphere by the expansion machine 6.
Embodiment two: the tower-tank combined photo-thermal composite compressed air energy storage system is applied to a scene that a compressor is driven by photovoltaic output.
When the photovoltaic output is excessive due to excellent solar energy irradiation resources, the excessive output after meeting the current power supply requirement can be used for driving the compressor 1, when the photovoltaic output fluctuation is caused by factors such as cloud cover and the like to impact the safety of a power grid, the photovoltaic output can be completely used for driving the compressor 1, the compressor 1 driven by the two photovoltaic outputs starts to suck and compress air, the subsequent process is the same as the operation of the valley filling period in the first embodiment, and the photo-thermal heat collection process in the second embodiment is the same as the photo-thermal heat collection process in the first embodiment.
The specific process flow of the second power generation process is the same as that of the first power generation process, and the difference is that the second power generation time can be flexibly mastered, and the power generation can be performed in the peak power period, and can be performed in other periods even synchronously with the compression energy storage and photo-thermal heat collection processes. The synchronous process of the power generation process and the compression energy storage and photo-thermal heat collection process mainly occurs in the scene of fluctuation of solar irradiation instead of surplus, and the fluctuation of solar irradiation can be the smooth output in the Rankine cycle device 15 through the combined regulation and control operation of the groove type heat collection field working medium pump 11, the groove type heat collection field 12, the groove type heat collection high-temperature working medium storage tank 13, the groove type heat collection high-temperature working medium pump 14 and the Rankine cycle device 15. Similarly, under the common adjustment actions of the gas storage device 3, the compressed heat high-temperature working medium storage tank 9, the compressed heat high-temperature working medium pump 10, the expansion side preheater 4, the tower heat collection low-temperature working medium storage tank 16, the tower heat collection working medium pump 17, the tower heat collector 18, the heliostat field 19, the tower heat collection high-temperature working medium storage tank 20, the tower heat collection high-temperature working medium pump 21, the expansion side reheater 5 and the expander 6, the fluctuating photovoltaic output during driving of the compressor 1 is also converted into smooth output to support the safe operation of the power grid.
According to the embodiment, the system fully combines the advantages of three technologies of compressed air energy storage, groove type solar heat collection and tower type solar heat collection, and has the following advantages while realizing the basic function of compressed air energy storage.
Firstly, the system fully expands the energy interface of the general non-afterburning compressed air energy storage technology, and greatly enhances the further absorption of the renewable energy sources by the compressed air energy storage technology through respectively introducing a groove type solar heat collection system and a tower type heat collection system at the compression side and the expansion side;
secondly, the system starts from the actual requirement of saving work on the compression side and doing more work on the expansion side, and fully utilizes the allowable temperature interval of two heat storage working media, namely heat conduction oil and molten salt, which are currently mainstream, so that the mutual restriction between compression heat and expansion heat in a general non-afterburning type compressed air energy storage system is eliminated;
in addition, the system greatly improves the grade of compression heat and expansion heat through a solar heat collection technology, so that the temperature of the compression heat is increased to be capable of driving Rankine cycle to generate power, and the economy of the system is greatly improved;
finally, the operation of each device in the system fully considers the peak-valley electricity price and the fluctuation of solar energy, so that the system has higher economy when being used for peak clipping and valley filling, and can successfully smooth the fluctuation when being used for absorbing solar energy; finally, the integrated three technologies, namely non-afterburning compressed air energy storage, trough heat collection and tower heat collection, successfully realize commercial operation, and the foundation can ensure the smooth realization of the system.
It should be noted that, in the present application, the first branch and the second branch are referred to, where the first branch and the second branch are merely to distinguish between the differences of positions, and are not sequentially separated.
It should be further noted that the azimuth or positional relationship indicated by "in and out" or the like in the present application is based on the azimuth or positional relationship shown in the drawings, and is merely for convenience of description and understanding, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present invention.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. Any combination of all the embodiments provided in the present invention is within the protection scope of the present invention, and will not be described herein.
The photo-thermal composite compressed air energy storage system with the tower-tank combination provided by the invention is described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (8)
1. A tower-tank combined photo-thermal composite compressed air energy storage system, comprising:
the air compression branch is formed by sequentially connecting a compressor (1), a compression side heat exchanger (2) and gas storage equipment (3) in series;
the air expansion branch is formed by sequentially connecting the gas storage equipment (3), the expansion side preheater (4), the expansion side reheater (5) and the expander (6) in series;
the compression heat cycle is formed by connecting a compression heat low-temperature working medium storage tank (7), the compression side heat exchanger (2), a compression heat high-temperature working medium storage tank (9) and the expansion side preheater (4) in series end to end;
the groove type heat collection power generation cycle is formed by connecting a compression heat high-temperature working medium storage tank (9), a groove type heat collection field (12), a groove type heat collection high-temperature working medium storage tank (13) and a Rankine cycle device (15) in series end to end;
the tower type heat collection circulation is formed by connecting a tower type heat collection low-temperature working medium storage tank (16), a tower type heat collector (18), a tower type heat collection high-temperature working medium storage tank (20) and the expansion side reheater (5) in series.
2. The combined tower-tank photo-thermal composite compressed air energy storage system according to claim 1, wherein a compression heat low-temperature working medium pump (8) is arranged between the compression heat low-temperature working medium storage tank (7) and the compression side heat exchanger (2), and a compression heat high-temperature working medium pump (10) is arranged between the compression heat high-temperature working medium storage tank (9) and the expansion side preheater (4).
3. The combined tower-tank photo-thermal composite compressed air energy storage system according to claim 1, wherein a tank type heat collection field working medium pump (11) is arranged between the compressed heat high temperature working medium storage tank (9) and the tank type heat collection field (12), and a tank type heat collection high temperature working medium pump (14) is arranged between the tank type heat collection high temperature working medium storage tank (13) and the rankine cycle device (15).
4. The combined tower-tank photo-thermal composite compressed air energy storage system according to claim 1, wherein a tower heat collection working medium pump (17) is arranged between the tower heat collection low-temperature working medium storage tank (16) and the tower heat collector (18), and a tower heat collection high-temperature working medium pump (21) is arranged between the tower heat collection high-temperature working medium storage tank (20) and the expansion side reheater (5).
5. The combined tower and trough photo-thermal compressed air energy storage system according to claim 1, characterized in that heliostat fields (19) for reflecting solar energy are symmetrically arranged on both sides of the tower collector (18).
6. A combined column-and-tank photo-thermal compressed air energy storage system according to any one of claims 1 to 5, characterized in that the compressor (1) is connected to an electric motor and the expander (6) is connected to an electric generator.
7. The combined column and tank photo-thermal composite compressed air energy storage system according to any one of claims 1 to 5, wherein the working medium of the compression thermal cycle and the tank heat collection power generation cycle are both heat transfer oil, and the working medium of the column heat collection cycle is molten salt.
8. The combined column-tank photo-thermal compressed air energy storage system according to any one of claims 1 to 5, wherein the compressor (1) and the compression side heat exchanger (2) are sequentially connected in series to form a first branch, and a plurality of the first branches are connected with the air storage device (3) to form the air compression branch;
the expansion side preheater (4), the expansion side reheater (5) and the expansion machine (6) are sequentially connected in series to form a second branch, and a plurality of second branches are connected with the gas storage device (3) to form the air expansion branch.
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Effective date of registration: 20231207 Address after: 310052 building B, 701 Jianghui Road, Binjiang District, Hangzhou City, Zhejiang Province Applicant after: Innovation and entrepreneurship center of State Grid Zhejiang Electric Power Co.,Ltd. Applicant after: TSINGHUA University Address before: 310052 building B, 701 Jianghui Road, Binjiang District, Hangzhou City, Zhejiang Province Applicant before: Innovation and entrepreneurship center of State Grid Zhejiang Electric Power Co.,Ltd. |