CN114776410B - Gravity compressed air energy storage system and method based on heat accumulating type gravity block - Google Patents
Gravity compressed air energy storage system and method based on heat accumulating type gravity block Download PDFInfo
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- CN114776410B CN114776410B CN202210718049.5A CN202210718049A CN114776410B CN 114776410 B CN114776410 B CN 114776410B CN 202210718049 A CN202210718049 A CN 202210718049A CN 114776410 B CN114776410 B CN 114776410B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
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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
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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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
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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
- 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
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
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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
Abstract
The application provides a gravity compressed air energy storage system based on heat accumulation formula gravity piece, including the shaft, the gravity piece, lever and piston, the bottom of shaft is provided with pressure cylinder and lever, the activity of gravity piece is pegged graft in the shaft, pass through sealing member sealing connection between gravity piece and the shaft lateral wall, the gravity piece, sealing member and shaft are located and form the gas storage chamber between the space of sealing member below, the intercommunication chamber is linked together with the gas storage chamber, the lever sets up in the intercommunication chamber, the one end of lever articulates there is the crank, the other end is located the below of gravity piece, the top and the articulate bottom of piston are connected, the piston activity is pegged graft in the pressure cylinder, it is sealed between piston and the pressure cylinder, form the seal chamber in the pressure cylinder of piston below, it has compressible gas to fill in the seal chamber. The pressure of the compressed air introduced into the air storage cavity can act on the piston, the piston drives the lever to incline when moving downwards, and the gravity pressing block is conveniently started by applying upward auxiliary force to the gravity pressing block.
Description
Technical Field
The application relates to the technical field of gravity compressed air energy storage, in particular to a gravity compressed air energy storage system and method based on a heat accumulating type gravity block.
Background
Gravity compressed air energy storage is through setting up the gravity piece in the shaft, pass through seal membrane sealing connection between gravity piece and the shaft, form sealed gas storage chamber in the shaft that is located gravity piece below, a storage for high-pressure gas, let in the gas storage chamber after compressing the air and turn into the gravitational potential energy of gravity piece with compressed air's energy part and save, in the energy storage process, through letting in gas to the gas storage chamber, make gas jack-up the gravity piece upwards in the gas storage chamber, but when the gravity of gravity piece is great, need great effort at gravity piece start-up, and the heat energy that compressed air produced carries out thermal storage usually through setting up heat exchange unit in the energy storage process, but heat exchange unit's setting makes energy storage system complicated.
Disclosure of Invention
The present application is directed to solving, at least in part, one of the technical problems in the related art.
Therefore, the purpose of the present application is to provide a gravity compressed air energy storage system based on a heat accumulating type gravity block, by arranging the pressure cylinder, the piston and the lever at the position of the air storage cavity, the pressure of the compressed air in the air storage cavity can act on the piston while ventilation is carried out, one end of the lever can be pulled to move downwards when the piston moves downwards, the other end of the lever is lifted, the lifted end applies upward auxiliary force to the gravity pressing block, the gravity pressing block is convenient to start, and the force applied to the lever is the pressure of the compressed air in the air storage cavity, so that the reasonable utilization of the pressure of the compressed air is realized when the gravity press block is started, meanwhile, the compressed gas and the gas introduced into the air expansion unit in the expansion process enter the heat storage material, the heat exchange in the compression and expansion processes is realized through the heat storage material, and a heat exchange unit is not required to be additionally arranged, so that the whole energy storage system is simple.
In order to achieve the above object, the present application provides a gravity compressed air energy storage system based on a heat accumulating type gravity block, including:
a shaft, a lever and a pressure cylinder are arranged at the bottom of the shaft, one end of the lever is hinged with a crank, the other end of the lever is positioned below the gravity block,
the gravity block is movably inserted in the vertical shaft and comprises a shell and a heat storage material filled in the shell, the outer wall of the shell is connected with the side wall of the vertical shaft in a sealing mode through a sealing piece, a gas storage cavity is formed among the shell, the sealing piece and the space of the vertical shaft below the sealing piece, a first vent hole communicated with the gas storage cavity is formed in the bottom of the shell, and an air compressor unit and an air expander unit are connected to the top of the shell;
the top end of the piston is connected with the bottom end of the crank, the piston is movably inserted into the pressure cylinder, the piston and the pressure cylinder are sealed, a sealed cavity is formed in the pressure cylinder below the piston, and compressible gas is filled in the sealed cavity so as to drive the piston to move downwards by introducing gas into the gas storage cavity, so that one end of the lever rises upwards to provide upward auxiliary force for the gravity block.
Furthermore, two second vent holes are formed in the top of the shell, valves are arranged at the two second vent holes, the two valves are respectively connected with an air inlet channel and an air outlet channel, and the air inlet channel and the air outlet channel are respectively connected with the air compressor unit and the air expansion unit.
Furthermore, isolation nets are arranged at the first vent hole and the second vent hole, so that the heat storage material is blocked by the isolation nets.
Furthermore, a plurality of communicating cavities are formed in the side wall of the vertical shaft, the communicating cavities are communicated with the gas storage cavity, the lever is arranged in the communicating cavities, and the pressure cylinder is arranged at the bottom of the communicating cavities.
Further, the pressure cylinder above the piston is filled with viscous pressure fluid, so that the sealing between the piston and the pressure cylinder is realized through the viscous pressure fluid.
Further, a support is arranged in the communication cavity, and the lever is mounted on the support.
Furthermore, the bottom end side wall of the shell is provided with an accommodating groove extending to the bottom surface, and one end of the lever extends into the accommodating groove.
Further, the levers in the plurality of communication chambers are arranged on the periphery side of the gravity block at equal angles, and the pressure cylinder is arranged in each communication chamber.
Further, the communication cavity is transversely arranged.
A gravity compressed air energy storage method based on a heat accumulating type gravity block comprises the following processes:
when energy is stored, the air compressor is driven by the motor to apply work to the gas compression, the normal-temperature and normal-pressure air is compressed to obtain high-temperature and high-pressure air, the high-temperature and high-pressure air is introduced into the gravity block movably inserted in the vertical shaft, heat is stored by the heat storage material in the gravity block to obtain low-temperature and high-pressure gas, and the low-temperature and high-pressure gas is introduced into a gas storage cavity formed among the gravity block, a sealing element connected between the gravity block and the vertical shaft and a space of the vertical shaft below the sealing element;
when energy is released, compressed gas in the gas storage cavity enters the gravity block to absorb heat stored in the heat storage material, and obtained high-temperature and high-pressure gas enters the air expansion unit through the gas outlet channel to do work to drive the generator to generate power.
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 foregoing 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 a gravity type compressed air energy storage system according to an embodiment of the present application;
in the figure, 1, a shaft; 2. a gravity block; 201. a housing; 202. a heat storage material; 203. a first vent hole; 204. a second vent hole; 205. an air intake passage; 206. an air outlet channel; 207. accommodating a tank; 208. an isolation net; 209. a third vent hole; 3. a lever; 4. a piston; 5. a communicating cavity; 6. a pressure cylinder; 7. a seal member; 8. a gas storage cavity; 9. a crank; 10. an air compressor unit; 11. an air expander set; 12. sealing the cavity; 13. a viscous pressure fluid; 14. and (4) a support.
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. On the contrary, the embodiments of the application include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
Fig. 1 is a schematic structural view of a gravity compressed air energy storage system based on a heat accumulating type gravity block according to an embodiment of the present application.
The utility model provides a gravity compressed air energy storage system based on heat accumulation formula gravity piece, includes shaft 1, gravity piece 2, lever 3 and piston 4, and wherein the bottom of shaft 1 is provided with lever 3 and pressure cylinder 6, and the one end of lever 3 articulates there is crank 9, and the other end is located the below of gravity piece 2.
The gravity block 2 is movably inserted in the shaft 1, the gravity block 2 is in sealing connection with the side wall of the shaft 1 through a sealing element 7, a gas storage cavity 8 is formed among the gravity block 2, the sealing element 7 and the space of the shaft 1 below the sealing element 7, the gravity block 2 can move up and down in the shaft 1, and a piston-cylinder system is formed between the gravity block 2 and the shaft 1, wherein the structure for realizing the sealing connection between the gravity block 2 and the shaft 1 through the sealing element 7 is the prior art, and details are not repeated here. The pressure cylinder 6 is positioned in the gas storage cavity 8, the gravity block 2 comprises a shell 201 and a heat storage material 202 filled in the shell 201, the bottom of the shell 201 is provided with a first vent hole 203 communicated with the gas storage cavity 8, the top of the shell 201 is connected with an air compressor set 10 and an air expansion set 11, high-temperature gas obtained after compression can be introduced into the shell 201 through the air compressor set 10 during energy storage, heat is stored in the heat storage material 202 through the heat storage material 202 and then introduced into the gas storage cavity 8 through the first vent hole 203 during the gas storage process, the gravity block 2 moves upwards to the highest limit during the gas storage process, so that part of energy of the compressed air is converted into gravitational potential energy of the gravity block 2, and gas in the gas storage cavity 8 during energy release is introduced into the shell 201 through the first vent hole 203, absorbs the heat stored in the heat storage material 202 during the heat storage material 202 and then enters the air expansion set 11 to do work, the generator is driven to generate electricity, the gravity block 2 moves downwards in the energy release process, the gravitational potential energy of the gravity block 2 is converted into partial electric energy, the heat storage material 202 is directly filled in the gravity block 2, the gravity block 2 can store energy through the gravitational potential energy, meanwhile, the energy can be stored through the heat storage material filled in the gravity block 2, the double energy storage effect of the gravity block 2 is achieved, heat exchange is achieved in a heat storage mode through the heat storage material filled in the gravity block 2, a heat exchanger does not need to be additionally added in the system for heat exchange, and space and cost are saved.
In addition, the top end of the piston 4 is connected with the bottom end of the crank 9, the piston 4 is movably inserted into the pressure cylinder 6, the piston 4 and the pressure cylinder 6 are sealed, a sealed cavity 12 is formed in the pressure cylinder 6 below the piston 4, compressible gas is filled in the sealed cavity 12, the piston 4 is driven to move downwards by introducing gas into the gas storage cavity 8, one end of the lever 3 is lifted upwards to provide upward auxiliary force for the gravity block 2, and the gravity block 2 is convenient to start.
Specifically, when compressed air is introduced into the air storage cavity 8 through the air compressor unit 10, the compressed air in the air storage cavity 8 enters the pressure cylinder 6 above the piston 4, the piston 4 moves downwards under the pressure of the compressed air to compress the compressible gas in the pressure cylinder 6, according to the lever principle, one end of the lever 3 is driven by the crank 9 to move downwards in the downward movement process of the piston 4, the other end of the lever 3 tilts upwards, the tilted end acts on the gravity block 2 in the upward movement process of the gravity block 2 to apply an upward force to the gravity block 2, so as to provide an auxiliary force for the upward starting of the gravity block 2, so that the gravity block 2 can be started conveniently, because the pressure of the compressed gas in the air storage cavity 8 is small in the starting process of the gravity block 2, the gravity block 2 can be mechanically lifted at the moment, and the lever 3 can provide an upward acting force for the gravity block 2 when one end of the lever 3 is lifted by utilizing the action of the compressed air in the air storage cavity 8, the reasonable utilization of the compressed air pressure is realized, and the force for mechanically lifting the gravity block 2 can also be reduced.
In some embodiments, two second ventilation holes 204 are disposed at the top of the housing 201, valves are disposed at the two second ventilation holes 204, the two valves are respectively connected to the air inlet channel 205 and the air outlet channel 206, the air inlet channel 205 and the air outlet channel 206 are respectively connected to the air compressor assembly 10 and the air expander assembly 11, so that when the air compressor assembly 10 introduces compressed air into the housing 201, the valve at the air outlet channel 206 is closed, so that the compressed air can enter the air storage chamber 8 from the second ventilation holes 204, and when energy is released, the valve at the air inlet channel 205 can be closed, so that the gas entering the housing 201 through the first ventilation hole 203 can only enter the air expander assembly 11 through the air outlet channel 206 to perform expansion work.
In some embodiments, the isolation net 208 is disposed at each of the first vent hole 203 and the second vent hole 204 to block the thermal storage material 202 through the isolation net 208, so as to prevent the thermal storage material 202 from spilling out, in addition, the housing 201 may be divided into a cylinder and a cover, the cover is disposed at the top of the cylinder, the first vent hole 203 is disposed at the bottom of the cylinder, then the isolation net 208 is fixed at the first vent hole 203, then the thermal storage material 202 is filled therein, two second vent holes 204 are opened on the cover, the isolation net 208 is fixed at both the two second vent holes 204, then the cover is disposed on the cylinder, the mesh holes on the isolation net 208 are smaller than the diameter of the thermal storage material 202, the thermal storage material 202 can be prevented from spilling out due to the blocking of the isolation net 208, and gas can also pass through the mesh holes on the isolation net 208.
In some embodiments, the side wall of the shaft 1 is provided with a plurality of communication cavities 5, the communication cavities 5 are communicated with the air storage cavity 8, the lever 3 is arranged in the communication cavities 5, and the pressure cylinder 6 is arranged at the bottom of the communication cavities 5.
The seal between the piston 4 and the pressure cylinder 6 is provided in various cases.
As a possible case, the pressure cylinder 6 above the piston 4 is filled with the viscous pressure liquid 13 to realize the sealing between the piston 4 and the pressure cylinder 6 through the viscous pressure liquid 13, and the sealing effect is good by using the liquid, and in the initial state, the gravity of the viscous pressure liquid acting on the piston 4 plus the air pressure in the air storage cavity 8 is balanced with the upward pressure of the compressible gas in the sealed cavity 12 on the piston 4, so that the lever 3 is in the horizontal state.
In some embodiments, a support 14 is arranged in the communication cavity 5, the lever 3 is mounted on the support 14, that is, the lever 3 can be hinged on the support 14, so that the joint of the lever 3 and the support 14 forms a fulcrum, and the two ends of the lever 3 can move up and down by changing the acting force of the two ends of the lever 3.
In some embodiments, the side wall of the bottom end of the housing 201 is provided with a receiving groove 207 extending to the bottom surface, the receiving groove 207 may be an annular groove extending to the outer wall of the housing 201, such that when the lever 3 is provided in plural, one end of each of the plural levers 3 extends into the receiving groove 207, such that when the lever 3 is lifted close to one end of the gravity block 2, the lever 3 can directly act on the gravity block 2 to provide an upward acting force for the gravity block 2, the receiving groove 207 is provided such that one end of the lever 3 extends into the receiving groove 207, such that when one end of the lever 3 is lifted, the lever 3 can ensure that the lever acts below the gravity block 2, and the gravity block 2 has an upward acting force, in addition, in order to facilitate compressed air to enter the housing 201 and to enter the air storage cavity from the housing 201, the first vent hole 203 directly and vertically penetrates through the bottom of the housing 201, and the side wall of the first vent hole 203 may be provided with plural third vent holes 209 communicating with the first vent hole 203, the third vent hole 209 penetrates through the sidewall of the bottom end of the housing 201 and is communicated with the receiving groove 207, so that when the housing 201 is supported at the bottom of the shaft 1, the compressed air in the housing 201 can enter the air storage chamber 8 through the third vent hole 209.
In addition, the communication cavities 5 are arranged in a plurality of numbers, the levers 3 in the communication cavities 5 are arranged on the periphery of the gravity block 2 at equal angles, a pressure cylinder 6 is arranged in each communication cavity 5, and therefore after compressed air enters the communication cavities 5, the pistons 4 in the communication cavities 5 have downward acting force, one ends of the levers 3 can be driven to move downwards, and upward acting force is applied to the gravity block 2 in the tilting process of the other ends.
It should be noted that the communicating chamber 5 may be transversely arranged, during construction, the communicating chamber 5 is directly formed by vertically constructing a section on the side wall of the vertical shaft 1, then the pressure cylinder 6 is arranged on the ground at one end of the communicating chamber 5 far away from the vertical shaft 1, the pressure cylinder 6 and the vertical shaft 1 are both vertically arranged, at this time, the support 14 is located in the communicating chamber 5, and the lever 3 is supported by the support 14.
A gravity compressed air energy storage method based on a heat accumulating type gravity block comprises the following processes:
in the initial state, the gravity of the viscous pressure liquid acting on the piston 4 and the air pressure in the air storage cavity 8 are balanced with the upward pressure of the compressible gas in the sealed cavity 12 on the piston 4, so that the lever 3 is in a horizontal state;
when energy is stored, the motor is electrified to drive the air compressor to apply work to gas compression, normal-temperature and normal-pressure air is compressed to obtain high-temperature and high-pressure air, the high-temperature and high-pressure air is introduced into the gravity block 2 to pass through the heat storage material 202, heat is stored in the heat storage material 202 to obtain low-temperature and high-pressure air, the low-temperature and high-pressure air is introduced into the air storage cavity 8, the compressed air in the air storage cavity 8 enters the pressure cylinder 6 through the communication cavity 5, downward pressure is applied to the piston 4, the piston 4 moves downwards in the pressure cylinder 6, one end of the lever 3 is pulled to move downwards through the crank 9 in the moving process, the other end of the lever 3 is lifted upwards, an upward auxiliary force is applied to the gravity block 2 in the lifting process, the gravity block 2 moves upwards to the highest limit position, one end, close to the gravity block 2, of the lever 3 also moves upwards to a certain position in the upward moving process of the gravity block 2 and then stops, the inclined state is kept;
when releasing energy, the compressed gas in the gas storage cavity 8 enters the gravity block 2 to absorb the heat stored in the heat storage material 202, the obtained high-temperature and high-pressure gas enters the air expansion unit 11 through the gas outlet channel 206 to do work to drive the generator to generate electricity, the gravity block 2 moves downwards, and when the gravity block 2 moves to contact with one end of the lever 3, the gravity block 2 is supported and buffered through one end of the lever 3, so that the gravity block 2 can slowly move downwards.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. The utility model provides a gravity compressed air energy storage system based on heat accumulation formula gravity piece which characterized in that includes:
a lever and a pressure cylinder are arranged at the bottom of the vertical shaft, one end of the lever is hinged with a crank, the other end of the lever is positioned below the gravity block,
the gravity block is movably inserted in the vertical shaft and comprises a shell and a heat storage material filled in the shell, the outer wall of the shell is connected with the side wall of the vertical shaft in a sealing mode through a sealing piece, a gas storage cavity is formed among the shell, the sealing piece and a space of the vertical shaft below the sealing piece, a first vent hole communicated with the gas storage cavity is formed in the bottom of the shell, and an air compressor unit and an air expander unit are connected to the top of the shell;
the top end of the piston is connected with the bottom end of the crank, the piston is movably inserted into the pressure cylinder, the piston and the pressure cylinder are sealed, a sealed cavity is formed in the pressure cylinder below the piston, and compressible gas is filled in the sealed cavity so as to drive the piston to move downwards by introducing gas into the gas storage cavity, so that one end of the lever rises upwards to provide upward auxiliary force for the gravity block.
2. The gravity-compressed air energy storage system based on a heat accumulating gravity block as claimed in claim 1, wherein two second air vents are arranged at the top of the casing, valves are arranged at the two second air vents, an air inlet channel and an air outlet channel are respectively connected to the two valves, and the air inlet channel and the air outlet channel are respectively connected to the air compressor unit and the air expander unit.
3. The gravity-compressed-air energy storage system based on a heat accumulating gravity block as claimed in claim 2, wherein an isolation net is arranged at each of the first vent hole and the second vent hole so as to block the heat accumulating material through the isolation net.
4. The gravity compressed air energy storage system based on a heat accumulating gravity block as claimed in claim 1, wherein a plurality of communication cavities are formed in the side wall of the vertical shaft, the communication cavities are communicated with the air storage cavities, the lever is arranged in the communication cavities, and the pressure cylinder is arranged at the bottom of the communication cavities.
5. A gravity compressed air energy storage system based on heat accumulating gravity blocks as claimed in claim 1 or 4, wherein the pressure cylinder above the piston is filled with viscous pressure fluid to realize the sealing between the piston and the pressure cylinder by the viscous pressure fluid.
6. The gravity compressed air energy storage system based on a heat accumulating gravity block as claimed in claim 4, wherein a support is arranged in the communication cavity, and the lever is mounted on the support.
7. The gravity-compressed air energy storage system based on a heat accumulating gravity block as claimed in claim 1, wherein the bottom side wall of the casing is provided with a receiving groove extending to the bottom surface, and one end of the lever extends into the receiving groove.
8. The gravity compressed air energy storage system based on a heat accumulating gravity block as claimed in claim 4, wherein the levers in a plurality of the communication cavities are arranged at equal angles on the periphery side of the gravity block, and the pressure cylinder is arranged in each communication cavity.
9. The gravity compressed air energy storage system based on a heat accumulating gravity block as claimed in claim 4, wherein the communication cavity is transversely arranged.
10. An energy storage method of a gravity compressed air energy storage system based on heat accumulating gravity blocks as claimed in any one of claims 1 to 9, characterized by comprising the following processes:
when energy is stored, the air compressor is driven by the motor to apply work to the gas compression, the normal-temperature and normal-pressure air is compressed to obtain high-temperature and high-pressure air, the high-temperature and high-pressure air is introduced into the gravity block movably inserted in the vertical shaft, heat is stored by the heat storage material in the gravity block to obtain low-temperature and high-pressure gas, and the low-temperature and high-pressure gas is introduced into a gas storage cavity formed among the gravity block, a sealing element connected between the gravity block and the vertical shaft and a space of the vertical shaft below the sealing element;
when energy is released, compressed gas in the gas storage cavity enters the gravity block to absorb heat stored in the heat storage material, and the obtained high-temperature and high-pressure gas enters the air expansion unit through the gas outlet channel to do work to drive the generator to generate power.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210718049.5A CN114776410B (en) | 2022-06-23 | 2022-06-23 | Gravity compressed air energy storage system and method based on heat accumulating type gravity block |
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| CN202210718049.5A CN114776410B (en) | 2022-06-23 | 2022-06-23 | Gravity compressed air energy storage system and method based on heat accumulating type gravity block |
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| 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 |
| CN115773224B (en) * | 2023-02-13 | 2023-04-25 | 西安热工研究院有限公司 | Isothermal compression constant-voltage power generation physical energy storage device, system and method |
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| US8146354B2 (en) * | 2009-06-29 | 2012-04-03 | Lightsail Energy, Inc. | Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange |
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| CN104675464A (en) * | 2013-12-03 | 2015-06-03 | 中国科学院工程热物理研究所 | Air compressing energy storage system |
| CN110436067A (en) * | 2019-08-02 | 2019-11-12 | 集美大学 | A kind of lower embedding type energy storage tank structure |
| CN113550803A (en) * | 2021-08-12 | 2021-10-26 | 西安热工研究院有限公司 | Air storage device and method for storing energy by gravity compressed air |
| CN114635842A (en) * | 2022-03-15 | 2022-06-17 | 北京启迪华腾科技开发有限公司 | Piston type constant-pressure compressed air energy storage system and using method thereof |
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