CN210033712U - Energy storage wind generating set - Google Patents
Energy storage wind generating set Download PDFInfo
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- CN210033712U CN210033712U CN201920910249.4U CN201920910249U CN210033712U CN 210033712 U CN210033712 U CN 210033712U CN 201920910249 U CN201920910249 U CN 201920910249U CN 210033712 U CN210033712 U CN 210033712U
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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
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The application discloses energy storage wind generating set, energy storage wind generating set includes: the system comprises a wind turbine, an air compressor, a liquid storage tank, an expander, a generator and a heat exchange system; the wind turbine is in power coupling connection with the power input end of the air compressor, the air outlet end of the air compressor is connected with the inlet of the liquid storage tank through the first path of the first heat exchanger of the heat exchange system, the outlet of the liquid storage tank is connected with the air inlet end of the expander through the first path of the second heat exchanger of the heat exchange system, the power output end of the expander is in power coupling connection with the power input end of the generator, and the second path of the first heat exchanger and the second path of the second heat exchanger are connected into the heat exchange circulation loop of the heat exchange system. The energy storage wind generating set solves the problems of fluctuation and intermittence of wind power generation, and enables the wind power generation to be adjustable, controllable, stable and continuous.
Description
Technical Field
The application belongs to the technical field of wind power generation, and particularly relates to an energy storage wind generating set.
Background
With the increasing exhaustion of traditional fossil energy such as coal and petroleum and the increasing aggravation of environmental pollution, many countries begin to vigorously develop power generation technologies using renewable energy such as wind power, solar energy and water power. Wind energy is a pollution-free and abundant renewable resource, and wind power generation is most competitive from the technical and cost aspects. The wind energy storage capacity of China is very large, the distribution range is wide, and the development prospect of the wind power generation industry is very wide.
However, wind power generation has volatility and intermittency, and the power consumption of users also has diversity and uncertainty, so that the electric energy generated by wind power generation cannot meet the requirements of users at the peak of power consumption, and a large amount of surplus power cannot be effectively utilized at the valley of power consumption, which adversely affects the stability of the whole power system. The uncontrollable property of wind power generation restricts the large-scale centralized utilization of the wind power generation, so that the abandoned wind rate is high.
In the related art, in order to solve the above technical problems, an energy storage system is usually adopted to cooperate with a wind generating set, and after the wind generating set generates electricity, the electricity can be converted into energy in other forms for storage, including forms of water potential energy, chemical energy of a battery and the like.
Disclosure of Invention
The present application is directed to solving at least one of the problems in the prior art.
According to this application embodiment's energy storage wind generating set includes: the system comprises a wind turbine, an air compressor, a liquid storage tank, an expander, a generator and a heat exchange system; the wind turbine is in power coupling connection with the power input end of the air compressor, the air outlet end of the air compressor is connected with the inlet of the liquid storage tank through the first path of the first heat exchanger of the heat exchange system, the outlet of the liquid storage tank is connected with the air inlet end of the expander through the first path of the second heat exchanger of the heat exchange system, the power output end of the expander is in power coupling connection with the power input end of the generator, and the second path of the first heat exchanger and the second path of the second heat exchanger are connected into the heat exchange circulation loop of the heat exchange system.
The energy storage wind generating set of this application embodiment has coupled wind power generation system and liquid air energy storage system, and the energy transfer between wind power generation system to the liquid air energy storage system need not through electric power, and the efficiency is high, has solved wind power generation's volatility and intermittent type nature problem, makes wind power generation adjustable controllable, and is stable continuous, becomes a high-quality power, and the small of whole unit, and energy storage density is higher, and is little to the place requirement.
According to this application one embodiment's energy storage wind generating set, heat transfer system includes: the heat exchange device comprises a first heat exchanger, a second heat exchanger, a cold storage tank and a heat storage tank, wherein the second path of the first heat exchanger, the heat storage tank, the second path of the second heat exchanger and the cold storage tank are sequentially connected end to form the heat exchange circulation loop.
According to the energy storage wind generating set of an embodiment of the application, the export of heat-retaining jar with be equipped with first pump between the second way of first heat exchanger, the export of heat storage jar with be equipped with the second pump between the second way of second heat exchanger.
According to the energy storage wind generating set of one embodiment of the application, a third pump is arranged between the outlet of the liquid storage tank and the first path of the second heat exchanger.
The energy storage wind generating set according to one embodiment of the application has a first working mode and a second working mode, wherein in the first working mode, the wind turbine drives the air compressor to work, and the first pump works; in a second mode of operation, the second pump is operated, the third pump is operated, and the expander drives the generator to generate electricity.
According to the energy storage wind generating set of one embodiment of the application, the air outlet of the liquid storage tank is connected with the air inlet of the air compressor.
According to this application one embodiment's energy storage wind generating set, still include: and the air outlet of the air purifier is connected with the air inlet of the air compressor.
According to the energy storage wind generating set of one embodiment of the application, the air compressor is coaxially and dynamically coupled with the wind turbine.
According to the energy storage wind generating set of one embodiment of the application, an expansion valve is arranged between the first path of the first heat exchanger and the inlet of the liquid storage tank.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an energy storage wind turbine generator system according to an embodiment of the present application.
Reference numerals:
an energy-storage wind generating set 100 is provided,
a wind turbine 10, an air purifier 20, an air compressor 30,
the system comprises a heat exchange system 40, a first heat exchanger 41, a second heat exchanger 42, a cold storage tank 43, a heat storage tank 44, a first pump 45, a second pump 46, an expansion valve 50, a liquid storage tank 60, a third pump 70, an expander 80 and a generator 90.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
An energy storage wind turbine generator set 100 according to an embodiment of the present application is described below with reference to fig. 1.
As shown in fig. 1, an energy storage wind turbine generator system 100 according to an embodiment of the present application includes: a wind turbine 10, an air compressor 30, a storage tank 60, an expander 80, a generator 90 and a heat exchange system 40.
Wherein the blades of wind turbine 10 are rotated by the wind to transform wind energy into mechanical energy. The air compressor 30 is used for liquefying air, and the air compressor 30 may be a single air compressor or a plurality of air compressor sets. The liquid storage tank 60 is used for storing liquefied air, the expander 80 is used for rotating under the driving of liquid air gasification and driving the generator 90 to generate electricity, and the heat exchange system 40 is used for exchanging heat with the air during air liquefaction and gasification.
Wind turbine 10 is power coupled to the power input of air compressor 30, i.e., wind turbine 10 can directly drive air compressor 30 without using electrical power to drive the compressor. The air outlet end of the air compressor 30 is connected with the inlet of the liquid storage tank 60 through the first path of the first heat exchanger 41 of the heat exchange system 40, the outlet of the liquid storage tank 60 is connected with the air inlet end of the expander 80 through the first path of the second heat exchanger 42 of the heat exchange system 40, the power output end of the expander 80 is in power coupling connection with the power input end of the generator 90, and the second path of the first heat exchanger 41 and the second path of the second heat exchanger 42 are connected in the heat exchange circulation loop of the heat exchange system 40.
The energy storage wind generating set 100 of the application can realize energy storage when electric power is surplus, and wind energy drives the wind turbine 10 to rotate, and the wind turbine 10 drives the air compressor 30 to compress air, for example, the air inlet of the air compressor 30 can be connected with the air purifier 20, the air outlet of the air purifier 20 is connected with the air inlet of the air compressor 30, and the air compressor 30 compresses the air after absorbing the air purified by the air purifier 20. The compressed air exchanges heat with the working medium in the heat exchange circulation loop through the first heat exchanger 41, the temperature of the compressed air is reduced, then the compressed air is continuously cooled and reduced in pressure through the expansion valve 50 to enter the liquid storage tank 60, the liquefied air is stored in the liquid storage tank 60, in some embodiments, an exhaust port of the liquid storage tank 60 is connected with an air inlet of the air compressor 30, and the non-liquefied air is introduced into an inlet of the compressor to be mixed with the purified air to be continuously circulated.
When the wind generating set 100 needing energy storage releases electric energy, the third pump 70 pumps out low-temperature liquid air in the liquid storage tank 60, the low-temperature liquid air exchanges heat with working media in the heat exchange circulation loop in the second heat exchanger 42, the temperature and the pressure of the liquid air are increased, high-temperature and high-pressure air enters the expansion machine 80 to expand to do work, the generator 90 is driven to generate electricity, the temperature and the pressure of the air after passing through the expansion machine 80 are all reduced, and the air can be directly discharged into the air.
The energy storage wind generating set 100 of the embodiment of the application couples the wind power generation system and the liquid air energy storage system, and the energy transmission from the wind power generation system to the liquid air energy storage system does not need to pass through electric power, the energy efficiency is high, the problem of volatility and intermittence of wind power generation is solved, the wind power generation is adjustable and controllable, the stability and the continuity are achieved, the high-quality power supply is formed, the size of the whole set is small, the energy storage density is high, and the requirement on the site is small.
In some embodiments, the air compressor 30 is coupled to the wind turbine 10 in a coaxial power coupling and the expander 80 is coupled to the generator 90 in a coaxial power coupling, so that the overall mechanism is small and has low kinetic energy losses.
Of course, in other embodiments, the wind turbine 10 and the air compressor 30 can be coupled by a variable speed transmission mechanism, and the expander 80 and the generator 90 can be coupled by a variable speed transmission mechanism, so that the rotation speed can be changed, and the efficiency of the air compressor 30 and the generator 90 can be improved.
In some embodiments, as shown in FIG. 1, heat exchange system 40 comprises: the heat exchanger comprises a first heat exchanger 41, a second heat exchanger 42, a cold storage tank 43 and a heat storage tank 44, wherein the second path of the first heat exchanger 41, the heat storage tank 44, the second path of the second heat exchanger 42 and the cold storage tank 43 are sequentially connected end to form a heat exchange circulation loop. A first pump 45 is arranged between the outlet of the cold storage tank 43 and the second path of the first heat exchanger 41, a second pump 46 is arranged between the outlet of the hot storage tank 44 and the second path of the second heat exchanger 42, and a third pump 70 is arranged between the outlet of the liquid storage tank 60 and the first path of the second heat exchanger 42.
In actual implementation, the first heat exchanger 41 is a low-temperature heat exchanger, the second heat exchanger 42 is a high-temperature heat exchanger, and the first heat exchanger 41 and the second heat exchanger 42 may be plate-fin heat exchangers or double-pipe heat exchangers, so that the heat exchange temperature difference can be reduced by increasing the heat exchange area, and the heat exchange efficiency can be improved. First pump 45 may be a cryogenic pump, second pump 46 may be a high temperature pump, and third pump 70 may be a cryogenic pump.
A heat exchange working medium is arranged in the heat exchange circulation loop, and when the heat exchange working medium passes through the second path of the first heat exchanger 41, the heat exchange working medium can exchange heat with air compressed by the air compressor 30, so that the air is cooled; the heat exchange medium may exchange heat with the liquefied air while passing through the second path of the second heat exchanger 42, thereby heating, gasifying and expanding the air.
The air compressor 30 is driven by the wind turbine 10 to do work, the air purified by the air purifier 20 is compressed, the compressed air is cooled in the first heat exchanger 41, the compressed air is cooled and depressurized through the expansion valve 50, air and liquid are separated in the liquid storage tank 60, the liquid air is stored in the liquid storage tank 60, the air which is not liquefied is introduced into an inlet of the compressor to pre-cool the purified air, and the mixed air enters the compressor to be continuously circulated.
The third pump 70 is used to pump out the liquid air in the liquid storage tank 60, and the liquid air exchanges heat with the working medium in the second heat exchanger 42 to raise the temperature and the pressure, and then is introduced into the expander 80.
The high temperature and high pressure air is expanded in an expander 80 to produce work, and the expander 80 may be a piston expander 80 or a turbo expander 80. The temperature and pressure of the air are reduced after the air does work, and the air can be directly emptied. The shaft of the expander 80 is connected to the engine drive shaft to drive the engine to generate electricity.
A heat storage tank 44 and a cold storage tank 43 are arranged between the low-temperature heat exchanger and the high-temperature heat exchanger, liquid working media are stored inside, and energy of the liquid air energy storage system is recovered and reused in a sensible heat mode. During the energy storage process, the first pump 45 leads out the low-temperature precooling working medium in the cold storage tank 43, flows through the low-temperature heat exchanger, increases the temperature, and enters the heat storage tank 44 for storage; during the energy releasing process, the second pump 46 leads out the high-temperature pre-cooling working medium in the heat storage tank 44, flows through the high-temperature heat exchanger, reduces the temperature, and enters the cold storage tank 43 for storage.
The energy-storing wind turbine generator set 100 has a first operating mode for storing energy and a second operating mode for releasing energy.
In a first mode of operation, the wind turbine 10 drives the air compressor 30 into operation and the first pump 45 into operation.
Specifically, when the system stores energy, the wind energy drives the rotating shaft of the wind turbine to rotate, directly drives the air compressor 30, and compresses the purified air. The compressed air passes through the low-temperature heat exchanger, at the moment, the first pump 45 leads out the low-temperature working medium in the cold storage tank 43, the low-temperature working medium exchanges heat with the compressed air in the first heat exchanger 41, the temperature of the compressed air is reduced, and the temperature of the precooling working medium is increased. The compressed air after temperature reduction further reduces the temperature and the pressure through an expansion valve 50, then is introduced into a liquid storage tank 60, liquid air is stored in the liquid storage tank, and the air which is not liquefied is introduced into an inlet of the compressor to be continuously compressed; the pre-cooling working medium after temperature rise enters the heat storage tank 44 for storage.
In the second mode of operation, the second pump 46 is operated, the third pump 70 is operated, and the expander 80 drives the generator 90 to generate electricity.
Specifically, when the system releases energy, the third pump 70 leads out the liquid air in the liquid storage tank 60, and the second pump 46 leads out the high-temperature working medium in the heat storage tank 44 through the high-temperature heat exchanger, so that the high-temperature working medium exchanges heat with the liquid air in the high-temperature heat exchanger, the temperature of the liquid air is increased, and the temperature of the precooled working medium is reduced. The liquid air after heating is introduced into an inlet of the expansion machine 80, work is done in the expansion machine 80, a rotating shaft of the expansion machine 80 drives the generator 90 to generate electric energy, the temperature and the pressure of the air after the work is done are all reduced, and then the air can be directly emptied; the cooled pre-cooling working medium enters the cold storage tank 43 for storage.
In the system, liquid air in the liquid storage tank 60 is used for expansion work after being heated, the generator 90 is driven to generate electricity, the generated power can be adjusted and controlled by adjusting the flow of the liquid air, and the generated power of the system is irrelevant to the size of wind power.
In summary, the present application is directed to the combined use of a wind power generation system and a liquid air energy storage system. The liquid air energy storage system enables the output electric power of the wind power generation to be adjustable and controllable, and stable and continuous electric power output is formed. A liquid air energy storage system is added in an original wind power generation system, and wind energy with volatility and intermittence is stored in a liquid air mode and has a heat pump function. The electric power can be stably outputted using the stored liquid air, the expander 80 and the generator 90. Compared with the prior art, the fan is directly utilized to drive the compressor, so that the energy conversion efficiency is improved; the energy storage mode of liquid air is used, the energy storage density is higher, and the requirement on the site is low.
According to the energy storage wind generating set 100, the problem of fluctuation and intermittence of wind power generation is solved by coupling the wind power generation with the liquid energy storage system, and adjustable, controllable, continuous and stable high-quality electric energy can be generated; the fan is used for directly driving the compressor, so that the energy conversion efficiency is improved; the liquid air energy storage system is utilized to improve the energy storage density, and the requirement on the site is low.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. An energy storage wind turbine generator system, comprising: the system comprises a wind turbine, an air compressor, a liquid storage tank, an expander, a generator and a heat exchange system; wherein
The wind turbine is in power coupling connection with the power input end of the air compressor, the air outlet end of the air compressor is connected with the inlet of the liquid storage tank through the first path of the first heat exchanger of the heat exchange system, the outlet of the liquid storage tank is connected with the air inlet end of the expander through the first path of the second heat exchanger of the heat exchange system, the power output end of the expander is in power coupling connection with the power input end of the generator, and the second path of the first heat exchanger and the second path of the second heat exchanger are connected into the heat exchange circulation loop of the heat exchange system.
2. The energy storage wind turbine generator set of claim 1, wherein the heat exchange system comprises: the heat exchange device comprises a first heat exchanger, a second heat exchanger, a cold storage tank and a heat storage tank, wherein the second path of the first heat exchanger, the heat storage tank, the second path of the second heat exchanger and the cold storage tank are sequentially connected end to form the heat exchange circulation loop.
3. The energy-storage wind generating set according to claim 2, wherein a first pump is arranged between the outlet of the cold storage tank and the second path of the first heat exchanger, and a second pump is arranged between the outlet of the hot storage tank and the second path of the second heat exchanger.
4. The energy-storing wind generating set according to claim 3, wherein a third pump is arranged between the outlet of the liquid storage tank and the first path of the second heat exchanger.
5. Energy-storing wind park according to claim 4, wherein the energy-storing wind park has a first and a second mode of operation, wherein
In a first operation mode, the wind turbine drives the air compressor to work, and the first pump works;
in a second mode of operation, the second pump is operated, the third pump is operated, and the expander drives the generator to generate electricity.
6. The energy-storing wind turbine generator set according to any of claims 1-5, wherein an exhaust port of the liquid storage tank is connected to an intake port of the air compressor.
7. The energy storage wind turbine generator set of any one of claims 1-5, further comprising: and the air outlet of the air purifier is connected with the air inlet of the air compressor.
8. The energy storage wind power generation assembly of any of claims 1-5, wherein the air compressor is in coaxial power coupling connection with the wind turbine.
9. The energy-storage wind generating set according to any one of claims 1-5, wherein an expansion valve is arranged between the first path of the first heat exchanger and the inlet of the liquid storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920910249.4U CN210033712U (en) | 2019-06-17 | 2019-06-17 | Energy storage wind generating set |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920910249.4U CN210033712U (en) | 2019-06-17 | 2019-06-17 | Energy storage wind generating set |
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| CN210033712U true CN210033712U (en) | 2020-02-07 |
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| CN201920910249.4U Active CN210033712U (en) | 2019-06-17 | 2019-06-17 | Energy storage wind generating set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115750017A (en) * | 2022-11-30 | 2023-03-07 | 国家电投集团科学技术研究院有限公司 | Liquid air energy storage coupling ammonia production power generation system and method |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115750017A (en) * | 2022-11-30 | 2023-03-07 | 国家电投集团科学技术研究院有限公司 | Liquid air energy storage coupling ammonia production power generation system and method |
| CN115750017B (en) * | 2022-11-30 | 2024-05-24 | 国家电投集团科学技术研究院有限公司 | Liquid air energy storage coupling ammonia production power generation system and method |
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