CN116816648B - Compressed air joint storage and heating system, power system and compressed air energy storage method - Google Patents
Compressed air joint storage and heating system, power system and compressed air energy storage method Download PDFInfo
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- CN116816648B CN116816648B CN202310367089.4A CN202310367089A CN116816648B CN 116816648 B CN116816648 B CN 116816648B CN 202310367089 A CN202310367089 A CN 202310367089A CN 116816648 B CN116816648 B CN 116816648B
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- 230000006835 compression Effects 0.000 claims abstract description 70
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 214
- 230000008569 process Effects 0.000 claims description 34
- 238000001816 cooling Methods 0.000 claims description 10
- 239000000112 cooling gas Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 15
- 238000005338 heat storage Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
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- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
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- 230000005611 electricity Effects 0.000 description 3
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- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D13/00—Combinations of two or more machines or engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/10—Combinations of wind motors with apparatus storing energy
- F03D9/17—Combinations of wind motors with apparatus storing energy storing energy in pressurised fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/10—Combinations of wind motors with apparatus storing energy
- F03D9/18—Combinations of wind motors with apparatus storing energy storing heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/06—Combinations of two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Power Engineering (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Wind Motors (AREA)
Abstract
The invention provides a compressed air combined heat storage and co-heating system, an electric power system and a compressed air energy storage method, and relates to the technical field of energy storage. The compressed air combined storage and co-heating system comprises an air compression system, a combined gas storage device and an air expansion system, wherein a common heat exchange device is arranged between the air compression system and the air expansion system, the common heat exchange device recovers compression heat and cools air when energy is stored, and the common heat exchange device recovers expansion cold and heats air when energy is released, and the combined gas storage device comprises a first gas storage device and a second gas storage device which are mutually communicated. The first gas storage device comprises a fan tower, and the second gas storage device is arranged underground, fixed under water or suspended in water. The invention can solve the problems that the land gas storage device in the prior compressed air energy storage technology is limited by geographical conditions, the marine gas storage device is easy to occupy the space near the sea, and the construction cost of the gas storage device and the heat exchange device is high, and has the effects of flexible arrangement of the gas storage device in multiple application scenes, common use of the public heat exchange device, cost reduction, synergy and the like.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to a compressed air combined heat and power system and a compressed air energy storage method.
Background
The compressed air energy storage technology is used as a key technology in the fields of distributed renewable energy application, future smart grids and micro-grid construction, and provides important support for realizing the utilization of large-scale new energy, i.e. safe and reliable, low-carbon, environment-friendly, high-efficiency and economical.
Because wind conditions on land or at sea are changeable, including stable wind conditions, gust wind conditions and gradual change wind conditions, the generated energy of the wind generating set is influenced by the wind conditions, so that wind power has intermittence, volatility and uncontrollability, and wind power grid connection fluctuation can cause impact on a power grid. Therefore, in the prior art, a compressed air energy storage device is used for adjusting the instability of the power grid and peak clipping and valley filling. The conventional compressed air energy storage coupling wind power technology comprises two application scenes of land and sea, and is indirectly connected through a large power grid.
Aiming at the air storage device of the land compressed air energy storage system, the method with lower construction cost in the prior art is to utilize the underground abandoned space to store the compressed air energy, and lay a flexible airtight polymer film on the inner wall of the underground space to store the high-pressure air. Specifically, the underground abandoned space comprises an underground cavity, which comprises a salt cavity, an underground aquifer, a hard rock cavity, a natural salt rock cavity, abandoned natural gas and a petroleum gas storage chamber. These underground abandoned spaces are limited by geographical conditions, on the one hand, and on the other hand, require long transport pipelines to be laid, which is costly to construct.
Aiming at the gas storage device of the offshore compressed air energy storage system, the prior art adopts a mode of constructing the sea level gas storage device, which faces the problems of large-area solicitation and the like in the near-far sea area, and adopts a mode of constructing the coastal ground gas storage device, which faces the problems of expensive land solicitation and the like near the coastline, and has high construction cost.
For the heat exchange device of the land and the sea compressed air energy storage system, a plurality of heat exchange devices, cold and hot storage tanks and pumping devices are required to be respectively arranged at the air compression system and the air expansion system in the prior art, and the heat exchange pipeline is complex, so that unavoidable along-path pressure loss and larger heat dissipation are brought.
The land and the sea compressed air energy storage coupling wind power system are used for adjusting an unstable power supply at the power grid side at present, and long power transmission and distribution lines are required to be laid for grid connection of the compressed air energy storage system and the wind power source side power supply, and the cost is high.
Disclosure of Invention
The invention at least solves one of the following technical problems that a low-cost underground abandoned space gas storage device of a compressed air energy storage system is limited by geographic conditions, a sea level gas storage device is required to be used in a large area of sea, a coastal ground gas storage device occupies coastal expensive land resources, the existing compressed air energy storage system has complex structure, numerous devices and low energy utilization rate, and long power transmission and distribution lines are required to be laid for coupling wind power. In order to overcome the defects in the prior art, the compressed air combined heat and power storage system, the power system and the compressed air energy storage method are provided.
In order to solve the problems, a first aspect of the invention provides a compressed air combined heat and storage system, which comprises an air compression system, a combined gas storage device and an air expansion system, wherein the output end of the air compression system is connected with the input end of the combined gas storage device, the output end of the combined gas storage device is connected with the input end of the air expansion system, a common heat exchange device is arranged between the air compression system and the air expansion system and is connected with the air compression system and used for cooling gas in the air compression process, the common heat exchange device is connected with the air expansion system and used for heating gas in the air expansion process, and the combined gas storage device comprises a first gas storage device and/or a second gas storage device. The first gas storage device comprises a fan tower cylinder, a first gas storage cavity is formed in the fan tower cylinder, the second gas storage device is arranged underground, underwater or suspended in water, the second gas storage device is provided with a second gas storage cavity, and the first gas storage cavity is communicated with the second gas storage cavity.
Optionally, the tower comprises a plurality of tower sections which are arranged in a split manner along the axial direction, and the first gas storage cavity is arranged in one or more tower sections.
Optionally, the tower cylinder comprises an outer cylinder body and an inner cylinder body which are sleeved in the radial direction, and an annular gap between the outer cylinder body and the inner cylinder body forms a first gas storage cavity.
Optionally, the second gas storage device comprises an artificial chamber, the cavity of the artificial chamber forms a second gas storage cavity, the artificial chamber is arranged below the tower, and the first gas storage cavity and the second gas storage cavity are communicated through a pipeline.
Optionally, the combined gas storage device comprises a storage tank fixedly arranged on the seabed, the inner cavity of the storage tank forms a second gas storage cavity, the storage tank is arranged below the tower, and the first gas storage cavity and the second gas storage cavity are communicated through a pipeline.
Optionally, the combined gas storage device comprises an air bag suspended in water, the inner cavity of the air bag forms a second gas storage cavity, the first gas storage cavity of the tower is provided with a connector, and the air tap of the air bag is connected with the connector through a pipeline.
Optionally, the compressed air combined heat and storage co-heat system comprises a common heat exchange device, the common heat exchange device comprises a first heat exchange channel, a second heat exchange channel and a third heat exchange channel, the input end of the first heat exchange channel is connected with the heat output end of the air compression system, the output end of the first heat exchange channel is connected with the input end of the combined gas storage device, the input end of the second heat exchange channel is connected with the output end of the combined gas storage device, the output end of the second heat exchange channel is connected with the heat input end of the air expansion system, and the third heat exchange channel circulates a heat exchange working medium.
The air compression system comprises at least two compressors connected in series, wherein the compressors are respectively arranged on the first pressure side and the second pressure side, the air expansion system comprises at least two gas expanders connected in series, the gas expanders are respectively arranged on the first pressure side and the second pressure side, a first heat exchange channel of a common heat exchange device is connected between the adjacent compressors on the first pressure side and/or the second pressure side, and a second heat exchange channel of the common heat exchange device is connected between the adjacent gas expanders.
Optionally, a pressure reducing device is arranged between the air compression system and the combined air storage device, the output end of the air compression system is connected with the input end of the pressure reducing device, the output end of the pressure reducing device is connected with the input end of the combined air storage device, a pressurizing device is arranged between the combined air storage device and the air expansion system, the input end of the pressurizing device is connected with the output end of the combined air storage device, and the output end of the pressurizing device is connected with the input end of the air expansion system.
The second aspect of the invention provides an electric power system, which comprises an electric network, a wind generating set and the compressed air combined heat and power storage system in any one of the technical schemes, wherein the air compression system is electrically connected with the electric network, or the air compression system is electrically connected with the wind generating set, and the air expansion system is electrically connected with the electric network.
The third aspect of the invention provides a compressed air energy storage method, which utilizes the compressed air combined heat and power storage system in any technical scheme to store air energy, and the method comprises the following steps of utilizing an air compression system to compress the air, utilizing a common heat exchange device to cool the air in the air compression process and store the compressed air in a combined gas storage device, and enabling the compressed air stored in the combined gas storage device to enter an air expansion system for expansion in the air expansion process, utilizing the common heat exchange device to heat the air and apply work and output, wherein the step of storing the compressed air in the combined gas storage device comprises storing the compressed air in a first gas storage device and/or a second gas storage device.
Alternatively, the heat energy generated by air compression in the energy storage process is used for heating the compressed air in the energy release process, and the cold energy generated by expansion of the compressed air in the energy release process is used for cooling the air in the energy storage process.
Optionally, in the energy storage process, air is compressed to a supercritical state, and the compressed air in the supercritical state is stored in the combined gas storage device.
The invention has the following advantages:
1. The compressed air combined heat storage and co-heating system or the compressed air combined gas storage method provided by the invention is utilized, when energy is stored, the air is compressed by the air compression system and stored in the combined gas storage device, and when energy is released, the compressed air in the combined gas storage device is released and is output to the air expansion system to generate power through expansion;
the invention is characterized in that a first gas storage device is arranged on a tower barrel, a space of the tower barrel can be used as a part of energy storage space, a second gas storage device is arranged, the second gas storage device is provided with the second gas storage cavity, the first gas storage cavity is communicated with the second gas storage cavity, the second gas storage device and the tower barrel are used for combined gas storage, the energy storage space of compressed air can be expanded, when the combined gas storage device is used on land, the second gas storage device is arranged underground, compared with the underground space of waste gas in the prior art, the combined gas storage device is not limited by geographic conditions, the second gas storage device can be arranged close to the tower barrel, the gas conveying pipeline is shortened, and the construction cost of the energy storage device is reduced;
The energy storage capacities of the first air storage cavity and the second air storage cavity can be flexibly distributed according to actual energy storage requirements such as site selection wind fields, geological conditions, deep sea conditions and the like;
When the device is used at sea, the second gas storage device is arranged underwater or suspended in water, static pressure of water is utilized to maintain constant pressure operation of the offshore compressed air combined heat storage and co-heating system, low-efficiency operation of the air compression system and the air expansion system deviating from a design working condition due to pressure change is avoided, and the energy conversion efficiency of the system is improved.
2. The tower tube sets up one or more tower section along the axial, in one or more tower section was located to first gas storage cavity, or the tower tube sets up outer barrel and inner barrel, the annular gap between the two constitutes first gas storage cavity, can be according to the actual conditions of tower tube, the setting mode of first gas storage cavity is selected in a flexible way, because tower tube itself is the pipeline-like steel storage tank structure, the accessible optimizes and utilizes tower tube inner space structure, replace current underground gas storage space, the construction cost of underground or ground gas storage space has been reduced.
3. By arranging the public heat exchange device, heat energy generated by air compression in the energy storage process can be used for heating compressed air in the energy release process; the method comprises the steps of using cold energy generated by compressed air expansion in an energy release process to cool air in an energy storage process, wherein a common heat exchange device is shared by the energy storage process and the energy release process, compressing and cooling the air during energy storage, respectively storing pressure potential energy and temperature heat energy in a combined gas storage device and the common heat exchange device, heating high-pressure air in the combined gas storage device through the common heat exchange device during energy release, changing the high-pressure air into high-pressure high-temperature air, and injecting the high-pressure high-temperature air into a gas expander for expansion work. The arrangement of the public heat exchange device can improve the heat energy utilization rate of the system and the operation efficiency of the system, and is beneficial to simplifying the system structure, reducing the occupied space, reducing the construction cost and having the effects of reducing the cost and enhancing the efficiency.
4. The air compression system and the air expansion system can compress air to a supercritical state, the system efficiency can be remarkably improved, the occupied space of air storage can be reduced, the air can be compressed to a non-supercritical state, and the specific air storage state of the compressed air energy storage system can be flexibly selected according to the power and the duration of electric energy storage required by low-peak electricity of a wind power plant or a power grid.
5. When the electric power system is utilized, the compressed air combined heat storage and sharing system is directly coupled with the sea wind power plant with relatively high and stable wind speed, distributed energy storage and regional micro-grid can be realized, the electric power system is close to a coastal load center, and the power transmission and distribution cost is reduced.
6. In the electric power system, when the combined gas storage device is used for the sea, other parts can be arranged on the sea except the combined gas storage device, so that the gas transmission pipeline can be shortened, the combined gas storage device can also be distributed on the land, the remote gas transmission can be replaced by remote power transmission, compression heat can be fully utilized, the energy waste is reduced, and the system efficiency is improved.
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 needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic structural diagram of an electric power system including a compressed air combined heat and power storage co-heat system provided by an embodiment of the present invention;
FIG. 2 is a schematic structural view of a first embodiment of a combined gas storage device in a compressed air combined heat and storage co-heat system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a second embodiment of a combined gas storage device in a compressed air combined heat and storage co-heat system according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a third embodiment of a combined gas storage device in a compressed air combined heat and storage co-heat system according to an embodiment of the present invention;
FIG. 5 is a schematic diagram showing the structure of a first embodiment of a first air storage device in the compressed air combined heat and power system according to the present invention;
FIG. 6 is a schematic diagram showing the construction of a second embodiment of a first gas storage device in a compressed air combined heat and storage co-thermal system according to the present invention;
Fig. 7 is a schematic structural diagram of a common heat exchange device in the compressed air combined heat and storage co-heat system provided by the invention on a first pressure side;
Fig. 8 shows a schematic structural diagram of a common heat exchange device in the compressed air combined heat and storage co-heat system provided by the invention on the second pressure side.
Reference numerals illustrate:
1. The system comprises an air compression system, 11, a compressor, 12, a cooler, 2, a combined gas storage device, 21, a tower cylinder, 211, a tower cylinder section, 212, an outer cylinder, 213, an inner cylinder, 214, a first gas storage cavity, 215, a manhole, 216, a connecting pipe, 22, a second gas storage device, 221, a storage tank, 222, an air bag, 223, a second gas storage cavity, 224, an artificial chamber, 3, an air expansion system, 31, a gas expansion machine, 4, a depressurization device, 41, a liquid expansion machine, 5, a pressurization device, 51, a cryopump, 6, a cold storage heat exchanger, 7, a public heat exchange device, 100, a compressed air energy storage system, 200, a power grid, 300 and a wind generating set.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. 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.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
For the purpose of illustrating the concepts of the invention, the drawings and detailed description are to be regarded as illustrative in nature and not as restrictive.
Example 1
A compressed air combined heat and power system is disclosed, and referring to fig. 1-8, and comprises an air compression system 1, a combined gas storage device 2 and an air expansion system 3, wherein the output end of the air compression system 1 is connected with the input end of the combined gas storage device 2, the output end of the combined gas storage device 2 is connected with the input end of the air expansion system 3, a common heat exchange device 7 is arranged between the air compression system 1 and the air expansion system 3, the common heat exchange device 7 is connected with the air compression system 1 and used for cooling gas in the air compression process, the common heat exchange device 7 is connected with the air expansion system 3 and used for heating gas in the air expansion process, and the combined gas storage device 2 comprises a first gas storage device and/or a second gas storage device 22. The first gas storage device comprises a fan tower 21, the fan tower 21 is provided with a first gas storage cavity 214, the second gas storage device 22 is arranged underground, underwater or suspended in water, the second gas storage device 22 is provided with a second gas storage cavity 223, and the first gas storage cavity 214 is communicated with the second gas storage cavity 223.
By utilizing the compressed air combined heat storage and co-heating system or the compressed air combined gas storage method provided by the invention, when energy is stored, air is compressed and stored in the combined gas storage device 2 through the air compression system 1, and when energy is released, compressed air in the combined gas storage device 2 is released and output to the air expansion system 3, and power generation is performed through expansion;
By arranging the combined gas storage device 2, wherein the tower drum 21 is provided with the first gas storage cavity 214, the space of the tower drum 21 can be used as a part of the energy storage space, the second gas storage device 22 is arranged, the second gas storage device 22 is provided with the second gas storage cavity 223, the first gas storage cavity 214 is communicated with the second gas storage cavity 223, the combined gas storage of the second gas storage device 22 and the tower drum 21 is realized, the energy storage space of compressed air can be expanded, when the combined gas storage device is used on land, the second gas storage device 22 is arranged underground, compared with the underground space of waste gas in the prior art, the combined gas storage device is not limited by geographical conditions, the second gas storage device 22 can be arranged close to the tower drum 21, the gas conveying pipeline is shortened, the construction cost of the energy storage device is reduced, and when the combined gas storage device is used on the sea, the second gas storage device 22 is arranged underwater or suspended in water, compared with the coastal construction underground space in the prior art, the coastal expensive land space is not occupied, the length of the gas conveying pipeline is shortened, and the construction cost is reduced.
The energy storage capacities of the first air storage cavity 214 and the second air storage cavity 223 can be flexibly distributed according to actual energy storage demands such as site selection wind fields, geological conditions, deep sea conditions and the like, specifically, when the capacity of the first air storage cavity 214 of the tower 21 is larger and the actual energy storage demand is lower, the capacity of the second air storage device 22 can be properly reduced, the construction cost of the second air storage device 22 is reduced, and when the capacity of the first air storage cavity 214 of the tower 21 is smaller and the actual energy storage demand is larger, the capacity of the second air storage device 22 can be properly enlarged to meet the offshore compressed air energy storage demand. The designer can flexibly allocate the energy storage capacities of the first air storage cavity 214 and the second air storage cavity 223 according to practical situations.
When the system is used at sea, the second gas storage device 22 is arranged underwater or suspended in water, static pressure of the water is utilized to maintain constant pressure operation of the offshore compressed air combined heat and storage system, low-efficiency operation of the air compression system 1 and the air expansion system 3 deviating from a design working condition due to pressure change is avoided, and the energy conversion efficiency of the system is improved.
Specifically, the output end of the air compression system 1 refers to a port of the air compression system 1 for outputting gas, which may be referred to as an air outlet end. The input end of the combined gas storage device 2 refers to a port for inputting compressed air into the combined gas storage device 2, and can also be called an air inlet end. The output end of the combined air storage device 2 refers to a port for outputting compressed air, and can also be called an air outlet end. The input end of the air expansion system 3 is directed to a port for inputting compressed air into the air expansion system 3, which may also be referred to as an intake end.
Alternatively, FIG. 5 provides a schematic structural view of a first embodiment of the tower 21, where the tower 21 includes a plurality of tower sections 211 that are axially split, and the first air storage cavity 214 is disposed within one or more of the tower sections 211. Specifically, along the axial direction of the tower drum 21, a flange is disposed at the connection end of the tower drum section 211, and two adjacent tower drum sections 211 are connected by bolts. The inner diameter of the tower section 211 gradually decreases from bottom to top, and thus the capacity of the first air storage cavities 214 in the plurality of tower sections 211 also decreases from bottom to top. Optionally, a gas storage barrel is arranged in the tower section 211, and an inner cavity of the gas storage barrel forms a first gas storage cavity 214.
Optionally, a manhole 215 is provided on the tower section 211 to facilitate access to the tower 21 for maintenance.
Alternatively, fig. 6 provides a schematic structural diagram of a second embodiment of the tower 21, where the tower 21 includes an outer cylinder 212 and an inner cylinder 213 that are radially sleeved, and an annular gap between the outer cylinder 212 and the inner cylinder 213 forms a first air storage cavity 214. Alternatively, the length of the inner cylinder 213 is equal to the length of the outer cylinder 212, and an annular gap between the inner cylinder 213 and the outer cylinder 212 constitutes the first gas storage cavity 214.
In the above two embodiments of the first air storage cavity 214, a designer can flexibly select according to the actual situation of the tower 21 and the energy storage requirement, so as to fully utilize the inner space of the tower 21.
For use on land, referring to fig. 2, the second gas storage device 22 includes an artificial chamber 224, the cavity of the artificial chamber 224 forms a second gas storage cavity 223, the artificial chamber 224 is disposed below the tower 21, and the first gas storage cavity 214 is in through communication with the second gas storage cavity 223 or is in communication with the second gas storage cavity through a pipeline. When the system is used on land, the common heat exchange device 7 is shared between the air compression system 1 and the air expansion system 3, and although the energy storage occupied area of compressed air is reduced by a combined heat and storage method, the land area has lower solicitation cost than the sea area, and the system has more advantages in construction of a 'Sha Gehuang' large-scale base project.
When the device is used at sea, referring to fig. 3, the second gas storage device 22 comprises a storage tank 221 fixedly arranged at the sea bottom, the inner cavity of the storage tank 221 forms a second gas storage cavity 223, the storage tank 221 is arranged below the tower 21, the bottom of the tower 21 is communicated with the storage tank 221 in a penetrating way, namely, the storage tank 221 can be used as the foundation of the bottom of the tower 21, the bottom of the tower 21 is communicated with the storage tank 221, and then the inner cavity of the tower 21 is directly communicated with the inner cavity of the storage tank 221.
Optionally, referring to fig. 4, the second gas storage device 22 includes a gas bag 222 suspended in water, the inner cavity of the gas bag 222 forms a second gas storage cavity 223, the tower 21 is provided with a connector, and the air tap of the gas bag 222 is connected with the connector of the tower 21 through a pipeline so as to communicate the first gas storage cavity 214 with the second gas storage cavity 223.
The adoption of the air bag 222 can realize the offshore floating type compressed air energy storage system 100, break through offshore limitation, avoid multi-functional interference, be applicable to the offshore large-scale floating type wind generating set 300, and meet the development requirement of continuous increase of the single-machine capacity of the offshore wind generating set 300.
Alternatively, the first air storage cavity 214 and the second air storage cavity 223 communicate through the connection pipe 216.
Optionally, referring to fig. 1, the compressed air combined storage co-heating system includes a common heat exchange device 7, where the common heat exchange device 7 includes a first heat exchange channel, a second heat exchange channel and a third heat exchange channel, the input end of the first heat exchange channel is connected with the heat output end of the air compression system 1, the output end of the first heat exchange channel is connected with the input end of the combined air storage device 2, the input end of the second heat exchange channel is connected with the output end of the combined air storage device 2, the output end of the second heat exchange channel is connected with the heat input end of the air expansion system 3, and the third heat exchange channel circulates a heat exchange working medium.
The air compression system 1 and the air expansion system 3 share a common heat exchange device 7, and a first heat exchange channel of the common heat exchange device 7 operates for cooling air during energy storage and a second heat exchange channel of the common heat exchange device 7 operates for heating air during energy release. The first heat exchange channel and the second heat exchange channel do not run simultaneously, and two functions in the energy storage and energy release process can be realized by adopting one common heat exchange device 7.
Specifically, in the air compression process, generated compression heat enters the first heat exchange channel to exchange heat with the heat exchange working medium in the third heat exchange channel, air in the first heat exchange channel is cooled, and heat is stored in the heat exchange working medium in the third heat exchange channel. In the air expansion process, heat exchange working medium in the third heat exchange channel and air in the second heat exchange channel are subjected to heat exchange, the air is heated and is used for air expansion to do work, meanwhile, the heat exchange working medium in the third heat exchange channel is cooled and can be used for cooling the air in the next round of air compression process, and therefore the air compression system 1 and the air expansion system 3 share the common heat exchange device 7. The heat energy generated by air compression in the energy storage process can be used for heating compressed air in the energy release process by arranging the common heat exchange device 7, cold energy generated by expansion of the compressed air in the energy release process is used for cooling air in the energy storage process, the common heat exchange device 7 is shared by the energy storage process and the energy release process, air is compressed and cooled during energy storage, pressure potential energy and temperature heat energy are respectively stored in the combined gas storage device 2 and the common heat exchange device 7, and high-pressure air in the combined gas storage device 2 is heated through the common heat exchange device 7 to be changed into high-pressure high-temperature air during energy release, and then the high-pressure high-temperature air is injected into the gas expander 31 for expansion work. The arrangement of the public heat exchange device 7 can improve the heat energy utilization rate of the system and the operation efficiency of the system, and is beneficial to simplifying the system structure, reducing the occupied space, reducing the construction cost and having the effects of reducing the cost and enhancing the efficiency.
Alternatively, the air compression system 1 has a first pressure side and a second pressure side, the pressure of the second pressure side being greater than the pressure of the first pressure side, the air compression system 1 comprises at least two compressors 11 connected in series, the plurality of compressors 11 being arranged separately on the first pressure side and the second pressure side, and the air expansion system 3 comprises at least two gas expanders 31 connected in series, the plurality of gas expanders 31 being arranged separately on the first pressure side and the second pressure side. Specifically, the first pressure side is a low pressure side and the second pressure side is a high pressure side.
As an embodiment in which the first common heat exchanging means 7 is shared, a first heat exchanging channel of the common heat exchanging means 7 is connected between adjacent compressors 11 on the first pressure side, and a second heat exchanging channel of the common heat exchanging means 7 is connected between adjacent gas expanders 31, as shown in fig. 7, in which the temperature parameters of the common heat exchanging means 7 on the first pressure side are similar, and the number and tonnage of heat exchanging devices can be reduced after sharing the common heat exchanging means 7 due to a small pressure difference.
As an embodiment in which the second common heat exchange means 7 is shared, the first heat exchange channels of the common heat exchange means 7 are connected between adjacent compressors 11 on the second pressure side, and the second heat exchange channels of the common heat exchange means 7 are connected between adjacent gas expanders 31, as shown in fig. 8, in this embodiment, the temperature parameters of the common heat exchange means 7 on the second pressure side are similar, and since the pressure difference is large, the pressure change needs to be considered when the first heat exchange channels and the second heat exchange channels are switched to operate, and the number and tonnage of heat exchange devices can be significantly reduced after sharing the common heat exchange means 7.
As an embodiment in which the third common heat exchange means 7 is shared, a first heat exchange passage of the common heat exchange means 7 is connected between adjacent compressors 11 on the first pressure side and the second pressure side, and a second heat exchange passage of the common heat exchange means 7 is connected between adjacent gas expanders 31, as shown in fig. 1.
The air compression system 1 and the air expansion system 3 share the common heat exchange device 7, so that the investment and construction cost of the heat exchange system is reduced.
Optionally, a pressure reducing device 4 is arranged between the air compression system 1 and the combined air storage device 2, the output end of the air compression system 1 is connected with the input end of the pressure reducing device 4, the output end of the pressure reducing device 4 is connected with the input end of the combined air storage device 2, a pressurizing device 5 is arranged between the combined air storage device 2 and the air expansion system 3, the input end of the pressurizing device 5 is connected with the output end of the combined air storage device 2, and the output end of the pressurizing device 5 is connected with the input end of the air expansion system 3.
The storage state of the compressed air includes a gaseous state and a non-gaseous state, and the non-gaseous state includes a liquid state and a supercritical state.
As a first embodiment of the compressed air energy storage system 100, referring to fig. 1, the air compression system 1 comprises a plurality of compressors 11 connected in series in sequence, wherein a cooler 12 is connected behind each compressor 11, and specifically, the cooler 12 comprises an intercooler arranged between two compressors 11 and an aftercooler arranged downstream of the terminal compressor 11. The air expansion system 3 comprises a plurality of stages of gas expansion machines 31 which are sequentially connected in series, wherein a reheater is connected in front of each stage of gas expansion machine 31, a cold accumulation heat exchanger 6 is connected between the air compression system 1 and the combined gas storage device 2 and between the air expansion system 3 and the combined gas storage device 2, the output end of the air compression system 1 is connected with the first input end of the cold accumulation heat exchanger 6, the first output end of the cold accumulation heat exchanger 6 is connected with the input end of the combined gas storage device 2, the output end of the combined gas storage device 2 is connected with the second input end of the cold accumulation heat exchanger 6, and the second output end of the cold accumulation heat exchanger 6 is connected with the air expansion system 3.
The working principle is that the multi-stage compressor 11 and the inter-stage cooler 12 can perform multi-stage compression and cooling on air during energy storage, compress the air and store the air in the combined gas storage device 2, the compressed air is stored in a gaseous state, and the compressed air is injected into the gas expander 31 during energy release and performs multi-stage heating and expansion to perform work and output.
As a second embodiment of the compressed air energy storage system 100, a cold storage heat exchanger 6 is arranged between the air compression system 1 and the combined air storage device 2, and the air compression system 1 comprises a depressurization device 4 arranged between the cold storage heat exchanger 6 and the combined air storage device 2. The regenerator 6 has a first inlet, a first outlet, a second inlet, and a second outlet. The output end of the compressor 11 is connected with the first inlet of the cold accumulation heat exchanger 6, the first outlet of the cold accumulation heat exchanger 6 is connected with the input end of the pressure reducing device 4, and the output end of the pressure reducing device 4 is connected with the input end of the combined gas storage device 2. During energy storage, high-pressure gas is compressed and cooled through the multi-stage compressor 11 and the inter-stage cooler 12, is subjected to heat exchange through the cold accumulation heat exchanger 6, is cooled again, is depressurized through the depressurization device 4 and is stored in the combined gas storage device 2 at normal pressure, and the storage state of the compressed air is non-gaseous. Alternatively, the pressure reducing means 4 comprises a liquid expander 41 or a throttle valve.
Optionally, the air expansion system 3 includes a pressurizing device 5, an input end of the pressurizing device 5 is connected with an output end of the combined air storage device 2, an output end of the pressurizing device 5 is connected with a second inlet of the cold-storage heat exchanger 6, and a second outlet of the cold-storage heat exchanger 6 is connected with an input end of the gas expansion machine 31. When releasing energy, the compressed air in the combined gas storage device 2 is pressurized by the pressurizing device 5, is heated to normal temperature by the cold storage heat exchanger 6, is heated and expanded by the multi-stage gas expander 31 and the pre-stage reheater, and is finally output. Optionally, the pressurizing means 5 comprises a cryopump 51.
In the present embodiment, since the air compression system 1 and the air expansion system 3 share the common heat exchanging device 7, the common heat exchanging device 7 is used as a reheater during the energy release.
Working principle:
When energy is stored, the multistage compressor 11 and the cooler 12 can perform multistage compression and cooling on air, heat exchange and depressurization of high-pressure air are performed, then the air is stored in a supercritical state or in a liquid state, and when energy is released, the air in the supercritical state or in the liquid state is subjected to supercharging and heat exchange, then multistage heating and expansion are performed, and work is performed outwards and output. The air compression system 1 and the air expansion system 3 can compress air to a supercritical state, so that the system efficiency can be remarkably improved, the air can be compressed to a liquid state, and the specific gas storage state of the energy storage system can be flexibly selected according to the power and the duration of the stored electric energy required by the wind power plant or the grid valley electricity. For example, when the energy storage is lower than the demand due to other factors such as peak electricity consumption or smaller wind force, the air in the supercritical state occupies less space than the air in the non-supercritical state, so that the air can be compressed to the supercritical state, and the capacity of the existing combined gas storage device 2 can be improved to meet the actual energy storage demand.
Example 2
An electric power system, referring to fig. 1, includes an electric grid 200, a wind power generator set 300, and the compressed air energy storage system 100 of embodiment 1, where the air compression system 1 is electrically connected to the electric grid 200, or where the air compression system 1 is electrically connected to the wind power generator set 300, and where the air expansion system 3 is electrically connected to the electric grid 200. The compressed air energy storage system 100 is coupled with the power grid 200 and the wind generating set 300, and the driving power in the compressed air energy storage system 100 can be provided by the power grid 200 or the wind generating set 300.
By utilizing the power system, the compressed air energy storage system 100 is directly and nearby coupled with a source side wind power plant power supply, so that a distributed energy storage and regional micro-grid can be realized, and when the micro-grid is coupled with the offshore wind turbine generator system 300, the micro-grid is close to a coastal load center, and the power transmission and distribution cost is reduced.
In the electric power system, when the electric power system is coupled with the offshore wind generating set 300, besides the combined gas storage device 2, the rest parts can be arranged on the sea, so that gas transmission pipelines can be shortened, the electric power system can also be distributed on land, long-distance transmission is used for replacing long-distance transmission, compression heat can be fully utilized, energy waste is reduced, and system efficiency is improved.
Working principle:
Since the air storage state can be selected according to the power and the time period of storing electric energy, the supercritical state is taken as an example for storage.
During energy storage, the multi-stage compressor 11 is driven by using the excessive electric energy of the load valley of the wind generating set 300 or the power grid 200, low-pressure air is compressed to a supercritical state, the low-pressure air is cooled to normal temperature through multiple stages, the low-pressure air is isobarically cooled and liquefied by using cold energy stored in the cold storage heat exchanger 6, the low-pressure air is depressurized by the depressurization device 4 and then is stored in the combined gas storage device 2 at normal pressure, and meanwhile, the air compression heat is recovered and stored in the public heat exchange device 7;
When energy is released, the air in the supercritical state in the combined gas storage device 2 is pressurized by the pressurizing device 5, is heated to normal temperature by the cold storage heat exchanger 6, passes through the multi-stage reheater, absorbs compression heat in the public heat exchange device 7, and finally is output to the outside through the expansion work of the multi-stage gas expander 31, and meanwhile, the air expansion cold is recovered and stored in the public heat exchange device 7.
When the electric power system provided by the embodiment is applied to the sea, the combined gas storage device 2 can operate at a constant pressure by using the static pressure maintenance system of water, so that the air compression system 1 and the air expansion system 3 are prevented from operating at low efficiency due to deviation from the design working condition caused by pressure change, and the energy conversion efficiency of the system is improved.
Example 3
A compressed air energy storage method utilizing the compressed air combined heat and storage system in the embodiment 1 to store air comprises the following steps of carrying out an energy storage process, compressing air by utilizing an air compression system 1, cooling the air by utilizing a common heat exchange device 7 in the air compression process, storing the compressed air in a combined gas storage device 2, carrying out an energy release process, enabling the compressed air stored in the combined gas storage device 2 to enter an air expansion system 3 for expansion, and heating the air by utilizing the common heat exchange device 7 in the air expansion process to apply work and output, wherein the step of storing the compressed air in the combined gas storage device 2 comprises storing the compressed air in a first gas storage device and/or a second gas storage device 22.
Alternatively, the heat energy generated by air compression in the energy storage process is used for heating the compressed air in the energy release process, and the cold energy generated by expansion of the compressed air in the energy release process is used for cooling the air in the energy storage process.
Optionally, during the energy storage process, air is compressed to a supercritical state, and the compressed air in the supercritical state is stored in the combined gas storage device 2.
The compressed air energy storage method provided by the embodiment has all the beneficial effects in embodiment 1, and is not repeated here.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (6)
1. The compressed air combined heat and storage co-heating system is characterized by comprising an air compression system (1), a combined gas storage device (2) and an air expansion system (3), wherein the output end of the air compression system (1) is connected with the input end of the combined gas storage device (2), the output end of the combined gas storage device (2) is connected with the input end of the air expansion system (3), a common heat exchange device (7) is arranged between the air compression system (1) and the air expansion system (3), the common heat exchange device (7) is connected with the air compression system (1) and used for cooling gas in an air compression process, the common heat exchange device (7) is connected with the air expansion system (3) and used for heating gas in an air expansion process, and the combined gas storage device (2) comprises:
the first gas storage device comprises a fan tower (21), and the fan tower (21) is provided with a first gas storage cavity (214);
the second gas storage device (22), the second gas storage device (22) is arranged underground, at the bottom of the sea or suspended in water, the second gas storage device (22) is provided with a second gas storage cavity (223), and the first gas storage cavity (214) is communicated with the second gas storage cavity (223);
the fan tower (21) comprises a plurality of tower sections (211) which are arranged in a split mode along the axial direction, and the first air storage cavity (214) is arranged in one or more tower sections (211);
Or the fan tower (21) comprises an outer cylinder (212) and an inner cylinder (213) which are sleeved along the radial direction, wherein an annular gap between the outer cylinder (212) and the inner cylinder (213) forms the first gas storage cavity (214);
The second gas storage device (22) comprises an artificial chamber (224), a cavity of the artificial chamber (224) forms a second gas storage cavity (223), the artificial chamber (224) is arranged below the fan tower (21), and the first gas storage cavity (214) is communicated with the second gas storage cavity (223) in a penetrating way or a pipeline way;
Or, the combined gas storage device (2) comprises a storage tank (221) fixedly arranged on the sea floor, the inner cavity of the storage tank (221) forms a second gas storage cavity (223), the storage tank (221) is arranged below the fan tower (21), and the first gas storage cavity (214) is communicated with the second gas storage cavity (223) in a penetrating way or through a pipeline;
Or, the combined gas storage device (2) comprises an air bag (222) suspended in water, the inner cavity of the air bag (222) forms the second gas storage cavity (223), the first gas storage cavity (214) of the fan tower (21) is provided with a connector, and the air tap of the air bag (222) is connected with the connector through a pipeline;
The public heat exchange device (7) comprises a first heat exchange channel, a second heat exchange channel and a third heat exchange channel, wherein the input end of the first heat exchange channel is connected with the heat output end of the air compression system (1), and the output end of the first heat exchange channel is connected with the input end of the combined gas storage device (2);
The air compression system (1) is provided with a first pressure side and a second pressure side, the pressure of the second pressure side is larger than that of the first pressure side, the air compression system (1) comprises at least two compressors (11) connected in series, a plurality of compressors (11) are respectively arranged on the first pressure side and the second pressure side, the air expansion system (3) comprises at least two gas expanders (31) connected in series, a plurality of gas expanders (31) are respectively arranged on the first pressure side and the second pressure side, the first heat exchange channels of the common heat exchange device (7) are connected between the adjacent compressors (11) on the first pressure side and/or the second pressure side, and the second heat exchange channels of the common heat exchange device (7) are connected between the adjacent gas expanders (31).
2. The compressed air combined heat and power storage system according to claim 1 is characterized in that a pressure reducing device (4) is arranged between the air compression system (1) and the combined gas storage device (2), the output end of the air compression system (1) is connected with the input end of the pressure reducing device (4), and the output end of the pressure reducing device (4) is connected with the input end of the combined gas storage device (2);
The combined gas storage device is characterized in that a pressurizing device (5) is arranged between the combined gas storage device (2) and the air expansion system (3), the input end of the pressurizing device (5) is connected with the output end of the combined gas storage device (2), and the output end of the pressurizing device (5) is connected with the input end of the air expansion system (3).
3. An electric power system, characterized by comprising an electric grid (200), a wind power generator set (300) and the compressed air combined heat and power storage system according to claim 1 or 2, wherein the air compression system (1) is electrically connected with the electric grid (200) or the air compression system (1) is electrically connected with the wind power generator set (300), and the air expansion system (3) is electrically connected with the electric grid (200).
4. A compressed air energy storage method, characterized in that the compressed air combined heat and power storage co-heating system according to claim 1 or 2 is used for air energy storage, comprising the following steps:
The energy storage process is to compress air by using an air compression system (1), cool the air by using a common heat exchange device (7) in the air compression process, and store the compressed air in a combined gas storage device (2);
In the energy release process, compressed air stored in the combined air storage device (2) enters an air expansion system (3) to be expanded, and in the air expansion process, the air is heated by a common heat exchange device (7) to do work and output;
wherein said storing compressed air in the combined gas storage means (2) comprises storing compressed air in said first gas storage means and/or said second gas storage means (22).
5. The method of storing compressed air according to claim 4, wherein heat energy generated by compressing air during the storing is used for heating the compressed air during the releasing, and cold energy generated by expanding the compressed air during the releasing is used for cooling the air during the storing.
6. A compressed air energy storage method according to claim 4 or 5, characterized in that during the energy storage air is compressed to a supercritical state and the compressed air in the supercritical state is stored in the combined gas storage device (2).
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| CN202310367089.4A CN116816648B (en) | 2023-04-07 | 2023-04-07 | Compressed air joint storage and heating system, power system and compressed air energy storage method |
| PCT/CN2023/092546 WO2024207582A1 (en) | 2023-04-07 | 2023-05-06 | Compressed-air combined-storage and co-heating system, power system and compressed-air energy storage method |
| JP2024000925U JP3246917U (en) | 2023-04-07 | 2024-03-27 | Compressed air storage and heat exchanger shared system and power system |
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| CN202310367089.4A CN116816648B (en) | 2023-04-07 | 2023-04-07 | Compressed air joint storage and heating system, power system and compressed air energy storage method |
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| CN118622661B (en) * | 2024-07-01 | 2025-04-18 | 中电建新能源集团股份有限公司 | Compressed air energy storage system and control method thereof |
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| CN107630787A (en) * | 2017-08-28 | 2018-01-26 | 西安理工大学 | A kind of floating marine wind power generation plant with constant pressure liquid energy storage |
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| CN205841083U (en) * | 2016-07-25 | 2016-12-28 | 任子豪 | A kind of Wave power generation device |
| CN108894929B (en) * | 2018-09-03 | 2024-04-05 | 贵州电网有限责任公司 | Low wind speed stage fan and compressed air energy storage hybrid power generation system and control method |
| GR20180100563A (en) * | 2018-12-18 | 2020-07-16 | Νικολαος Παναγιωτη Πηττας | Self-acting system operating via storage of wind and photovoltaic energy for incessant power generation and energetic autonomy |
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| CN110360056A (en) * | 2019-08-08 | 2019-10-22 | 西安热工研究院有限公司 | Indirect-cooling sea air accumulation energy type wind generator system and operation method |
| CN110332075A (en) * | 2019-08-08 | 2019-10-15 | 西安热工研究院有限公司 | Indirect-cooling air heat accumulation energy storage offshore wind power system and operation method |
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| CN101487454A (en) * | 2008-01-15 | 2009-07-22 | 韩统 | Wind energy storage and power generation apparatus |
| CN107630787A (en) * | 2017-08-28 | 2018-01-26 | 西安理工大学 | A kind of floating marine wind power generation plant with constant pressure liquid energy storage |
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| WO2024207582A1 (en) | 2024-10-10 |
| CN116816648A (en) | 2023-09-29 |
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