CN114033636A - Suspended gravity energy storage system and method - Google Patents
Suspended gravity energy storage system and method Download PDFInfo
- Publication number
- CN114033636A CN114033636A CN202111329367.4A CN202111329367A CN114033636A CN 114033636 A CN114033636 A CN 114033636A CN 202111329367 A CN202111329367 A CN 202111329367A CN 114033636 A CN114033636 A CN 114033636A
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- 230000005484 gravity Effects 0.000 title claims abstract description 118
- 238000004146 energy storage Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000010248 power generation Methods 0.000 claims abstract description 37
- 230000005540 biological transmission Effects 0.000 claims abstract description 34
- 230000006835 compression Effects 0.000 claims abstract description 14
- 238000007906 compression Methods 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims 1
- 239000000725 suspension Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G3/00—Other motors, e.g. gravity or inertia motors
Abstract
The invention discloses a suspended gravity energy storage system and a suspended gravity energy storage method, wherein the suspended gravity energy storage system comprises an electric device, a power generation device, a transmission device, a gravity block, a gravity pool, a compressed air source, an air storage device and an air compression device; the gravity block is connected with the electric device and the power generation device through the transmission device, the lower side of the gravity block is located in the gravity tank, the bottom of the gravity tank is provided with the buffer device and the pressure relief device, the gravity tank is communicated with the compressed air source, the air storage device and the air compression device, and the air storage device is communicated with the compressed air source.
Description
Technical Field
The invention belongs to the technical field of energy storage, and relates to a suspended gravity energy storage system and a suspended gravity energy storage method.
Background
The energy storage technology coupled with the new energy power generation technology and the peak-shaving frequency modulation technology is rapidly developed in recent years, and the main energy storage technology types are electrochemical energy storage, pumped water energy storage, compressed air energy storage, heat storage energy storage, gravity energy storage, flywheel energy storage and the like. The gravity energy storage has the advantages of high energy storage efficiency, high stability, high response speed and the like, and meanwhile, the defects of low energy density, large occupied area and the like exist, the commercial application is less at present, a 35MW gravity energy storage system is built in India, and a 1-seat 250kW gravity energy storage system is also built in Scotland.
The mass of the module in the gravity energy storage system is hundreds of tons or even thousands of tons, and the key problems that how to ensure the safety of the energy storage system under the extreme working conditions of earthquakes and the like and how to control the energy storage module to stably land and not consume energy restrict the development of the gravity energy storage technology are solved. The idea of using underground waste mines to store energy by gravity is proposed in domestic and foreign documents, but the application scene is limited and the problems cannot be fundamentally solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a suspension type gravity energy storage system and a suspension type gravity energy storage method, which have the characteristics of high safety, stable landing and no energy consumption.
In order to achieve the aim, the suspension type gravity energy storage system comprises an electric device, a power generation device, a transmission device, a gravity block, a gravity pool, a compressed air source, an air storage device and an air compression device;
the gravity block is connected with the electric device and the power generation device through the transmission device, the lower side of the gravity block is located in the gravity tank, the bottom of the gravity tank is provided with the buffer device and the pressure relief device, the gravity tank is communicated with the compressed air source, the air storage device and the air compression device, and the air storage device is communicated with the compressed air source.
The gravity tank is communicated with the compressed air source, the air storage device and the air compression device through a first air pipeline.
The device also comprises an expansion power generation device; wherein, the gas storage device is communicated with the expansion power generation device.
The air storage device is communicated with the compressed air source and the expansion power generation device through a second air pipeline.
Valves are arranged on the gravity pool, the air storage device, the first air pipeline and the second air pipeline.
The transmission device is a reel or a gear.
The power generation device is connected with the transmission device through a first clutch.
The electric device is connected with the transmission device through a second clutch.
And a sealing device and a resistance reducing device are arranged between the inner wall of the gravity pool and the outer wall of the gravity block.
The suspension type gravity energy storage method comprises the following steps:
in the energy storage stage, the power generation device is separated from the transmission device, valves on the first air pipeline and the second air pipeline are closed, the pressure relief device is opened, the electric device lifts the gravity block through the transmission device, when the gravity block is lifted in place, the transmission device is locked, and the electric device is closed;
then closing the pressure relief device, and storing air into the gravity tank through an air compression device;
in the energy release stage, the electric device is disconnected from the transmission device, the pressure relief device is closed, the air pressure in the gravity tank is adjusted to a set value through the compressed air source and the air storage device, then the transmission device is opened, the gravity block begins to descend, when the speed of the gravity block reaches the set value, the power generation device is opened to generate power, the opening degree of a valve between the gravity tank and the air storage device is adjusted to keep the speed of the gravity block constant until the power generation is finished, then the power generation device is closed, the opening degree of the valve between the gravity tank and the air storage device is adjusted to enable the gravity block to decelerate until the gravity block stops, and the compressed air in the air storage device enters the compressed air source to be recycled.
The invention has the following beneficial effects:
during specific operation, the suspended gravity energy storage system and the suspended gravity energy storage method enable the gravity block to be stably started, descended and stopped by controlling the density of air in the gravity tank, ensure stable operation of a power generation device, reduce the falling risk of the gravity block, improve the safety performance of the energy storage system, reduce mechanical abrasion, prolong the service life of the system, recover energy, do not consume energy, and further improve energy storage and release efficiency.
Drawings
FIG. 1 is a system diagram of the present invention.
Wherein, 1 is an electric device, 2 is a power generation device, 3 is a transmission device, 4 is a gravity block, 5 is a gravity tank, 6 is a compressed air source, 7 is an air storage device, 8 is an air compression device, 9 is an expansion power generation device, 41 is a sealing device, 42 is a resistance reduction device, 43 is a buffer device, and 51 is a pressure relief device.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the suspension type gravity energy storage system of the present invention includes an electric device 1, a power generation device 2, a transmission device 3, a gravity block 4, a gravity tank 5, a compressed air source 6, an air storage device 7, an air compression device 8, and an expansion power generation device 9;
Further, the transmission device 3 is a reel or a gear. The gravity block 4 is made of steel, concrete, stone or lead. The gravity tank 5 has sealing and pressure-bearing properties. The gravity basin 5 is arranged vertically or obliquely.
The transmission device 3 is provided with a data sensor, and the gravity tank 5, the gas storage device 7, the first air pipeline and the second air pipeline are all provided with valves and detection instruments.
The gas storage device 7 is a one-stage or multi-stage gas storage device.
The power generation device 2 is connected with the transmission device 3 through a first clutch; the electric device 1 is connected with the transmission device 3 through a second clutch.
The suspension type gravity energy storage method comprises the following steps:
in the energy storage stage, the power generation device 2 is disconnected from the transmission device 3, valves on the first air pipeline and the second air pipeline are closed, the pressure relief device 51 is opened, the electric device 1 lifts the gravity block 4 through the transmission device 3, when the gravity block 4 is lifted in place, the transmission device 3 is locked, and the electric device 1 is closed;
then the pressure relief device 51 is closed, and air is stored in the gravity tank 5 through the air compression device 8.
In the energy release stage, the electric device 1 is disconnected from the transmission device 3, the pressure relief device 51 is closed, the air pressure in the gravity tank 5 is adjusted to a set value through the compressed air source 6 and the air storage device 7, then the transmission device 3 is opened, the gravity block 4 begins to descend, when the speed of the gravity block 4 reaches the set value, the power generation device 2 is opened to generate power, the opening degree of a valve between the gravity tank 5 and the air storage device 7 is adjusted to keep the speed of the gravity block 4 constant until the power generation is finished, then the power generation device 2 is closed, the opening degree of the valve between the gravity tank 5 and the air storage device 7 is adjusted to slow down the gravity block 4 until the gravity block stops, and the compressed air in the air storage device 7 enters the compressed air source 6 to be recycled.
Preferably, the compressed air in the air storage device 7 enters the expansion power generation device 9 to do work, so that the expansion power generation device 9 generates power.
Further illustrated in a particular embodiment:
the gravity block 4 is a cylinder with the diameter of 20m and the height of 10m, the mass of the gravity block 4 is 600t, the effective potential energy height of the gravity well is 120m, the energy stored by a single energy storage module is 200kWh, the lifting speed is set to be 0.2m/s, the total power of a motor is 1.2MW, the landing speed is set to be 0.1m/s, the pressure of the gravity well is 3kPa, the total power of a generator is 500kW, the total released energy of the generator is 167MWh, the energy recovered by compressed air is 31.4MWh, 50 gravity energy storage modules are used in parallel, and the capacity of the gravity energy storage system can reach 10 MWh.
Claims (10)
1. A suspended gravity energy storage system is characterized by comprising an electric device (1), a power generation device (2), a transmission device (3), a gravity block (4), a gravity pool (5), a compressed air source (6), an air storage device (7) and an air compression device (8);
the gravity block (4) is connected with the electric device (1) and the power generation device (2) through the transmission device (3), the lower side of the gravity block (4) is located in the gravity tank (5), the bottom of the gravity tank (5) is provided with the buffer device (43) and the pressure relief device (51), the gravity tank (5) is communicated with the compressed air source (6), the air storage device (7) and the air compression device (8), and the air storage device (7) is communicated with the compressed air source (6).
2. The suspended gravity energy storage system according to claim 1, wherein the gravity tank (5) is in communication with the compressed air source (6), the air storage device (7) and the air compression device (8) via a first air conduit.
3. The suspended gravity energy storage system according to claim 2, further comprising an expansion power generation device (9); wherein, the gas storage device (7) is communicated with the expansion power generation device (9).
4. The suspended gravity energy storage system according to claim 3, wherein the air storage device (7) is communicated with the compressed air source (6) and the expansion power generation device (9) through a second air pipeline.
5. The suspended gravity energy storage system according to claim 4, wherein valves are arranged on the gravity tank (5), the air storage device (7), the first air pipe and the second air pipe.
6. The suspended gravity energy storage system according to claim 1, wherein the transmission means (3) is a reel or a gear.
7. The suspended gravity energy storage system according to claim 1, characterized in that the power generation device (2) and the transmission device (3) are connected by a first clutch.
8. The suspended gravity energy storage system according to claim 7, characterized in that the electric device (1) and the transmission device (3) are connected by a second clutch.
9. The suspended gravity energy storage system according to claim 1, characterized in that a sealing device (41) and a resistance reducing device (42) are arranged between the inner wall of the gravity pool (5) and the outer wall of the gravity block (4).
10. A suspended gravity energy storage method is characterized in that the suspended gravity energy storage system based on claim 5 comprises the following steps:
in the energy storage stage, the power generation device (2) is disconnected from the transmission device (3), valves on the first air pipeline and the second air pipeline are closed, the pressure relief device (51) is opened, the electric device (1) lifts the gravity block (4) through the transmission device (3), when the gravity block (4) is lifted in place, the transmission device (3) is locked, and the electric device (1) is closed;
then the pressure relief device (51) is closed, and air is stored in the gravity tank (5) through the air compression device (8);
in the energy release stage, the electric device (1) is disconnected from the transmission device (3), the pressure relief device (51) is closed, the air pressure in the gravity tank (5) is adjusted to a set value through the compressed air source (6) and the air storage device (7), then the transmission device (3) is opened, the gravity block (4) begins to descend, when the speed of the gravity block (4) reaches the set value, the power generation device (2) is opened to generate power, the opening degree of a valve between the gravity tank (5) and the air storage device (7) is adjusted to keep the speed of the gravity block (4) constant until power generation is finished, then the power generation device (2) is closed, the opening degree of a valve between the gravity tank (5) and the air storage device (7) is adjusted to enable the gravity block (4) to decelerate until the air storage device (7) stops, and compressed air in the air storage device (7) enters the compressed air source (6) to be recycled.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111329367.4A CN114033636A (en) | 2021-11-10 | 2021-11-10 | Suspended gravity energy storage system and method |
| PCT/CN2021/131952 WO2023082312A1 (en) | 2021-11-10 | 2021-11-19 | Suspension-type gravity energy storage system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111329367.4A CN114033636A (en) | 2021-11-10 | 2021-11-10 | Suspended gravity energy storage system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114033636A true CN114033636A (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202111329367.4A Pending CN114033636A (en) | 2021-11-10 | 2021-11-10 | Suspended gravity energy storage system and method |
Country Status (2)
| Country | Link |
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| CN (1) | CN114033636A (en) |
| WO (1) | WO2023082312A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718684A (en) * | 2022-06-08 | 2022-07-08 | 西安热工研究院有限公司 | Gravity hydraulic compressed air energy storage system and method |
| CN114718687A (en) * | 2022-06-08 | 2022-07-08 | 西安热工研究院有限公司 | Gravity compressed air energy storage device arranged underground layered gravity block |
| CN114718688A (en) * | 2022-06-08 | 2022-07-08 | 西安热工研究院有限公司 | Gravity compressed air energy storage system and method based on magnetic suspension balance |
| CN114810261A (en) * | 2022-06-23 | 2022-07-29 | 西安热工研究院有限公司 | Gravity type compressed air energy storage system and method |
| CN115223436A (en) * | 2022-07-07 | 2022-10-21 | 西安热工研究院有限公司 | Experimental model device for simulating operation of gravity compressed air energy storage system |
| WO2023103677A1 (en) * | 2022-11-07 | 2023-06-15 | 张鲁国 | Piston type gas power well energy storage and power generation system and energy storage and power generation method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116906289B (en) * | 2023-09-12 | 2023-12-15 | 九州绿能科技股份有限公司 | Gravity energy storage power generation system and working method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111237144A (en) * | 2020-01-14 | 2020-06-05 | 中国华能集团有限公司 | Gravity compressed air energy storage system and working method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101782049A (en) * | 2010-01-28 | 2010-07-21 | 曹信江 | Large-capacity gravity energy storage device for power station |
| WO2012151388A1 (en) * | 2011-05-04 | 2012-11-08 | Seapower Systems, Llc | Gravity-based energy-storage and method |
| CN109505666B (en) * | 2018-12-05 | 2023-12-22 | 中国科学院工程热物理研究所 | Injection expansion combined type compressed air energy storage system |
| CN113550867B (en) * | 2020-04-23 | 2023-09-29 | 年启贺 | Gravity compressed air energy storage speed stabilizing device |
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2021
- 2021-11-10 CN CN202111329367.4A patent/CN114033636A/en active Pending
- 2021-11-19 WO PCT/CN2021/131952 patent/WO2023082312A1/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237144A (en) * | 2020-01-14 | 2020-06-05 | 中国华能集团有限公司 | Gravity compressed air energy storage system and working method thereof |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718684A (en) * | 2022-06-08 | 2022-07-08 | 西安热工研究院有限公司 | Gravity hydraulic compressed air energy storage system and method |
| CN114718687A (en) * | 2022-06-08 | 2022-07-08 | 西安热工研究院有限公司 | Gravity compressed air energy storage device arranged underground layered gravity block |
| CN114718688A (en) * | 2022-06-08 | 2022-07-08 | 西安热工研究院有限公司 | Gravity compressed air energy storage system and method based on magnetic suspension balance |
| CN114718687B (en) * | 2022-06-08 | 2022-08-26 | 西安热工研究院有限公司 | Gravity compressed air energy storage device arranged underground layered gravity block |
| CN114718688B (en) * | 2022-06-08 | 2022-08-26 | 西安热工研究院有限公司 | Gravity compressed air energy storage system and method based on magnetic suspension balance |
| CN114810261A (en) * | 2022-06-23 | 2022-07-29 | 西安热工研究院有限公司 | Gravity type compressed air energy storage system and method |
| CN114810261B (en) * | 2022-06-23 | 2022-10-11 | 西安热工研究院有限公司 | Gravity type compressed air energy storage system and method |
| CN115223436A (en) * | 2022-07-07 | 2022-10-21 | 西安热工研究院有限公司 | Experimental model device for simulating operation of gravity compressed air energy storage system |
| CN115223436B (en) * | 2022-07-07 | 2023-11-17 | 西安热工研究院有限公司 | Experimental model device for simulating operation of gravity compressed air energy storage system |
| WO2023103677A1 (en) * | 2022-11-07 | 2023-06-15 | 张鲁国 | Piston type gas power well energy storage and power generation system and energy storage and power generation method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023082312A1 (en) | 2023-05-19 |
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