CN115031153B - Heat accumulating type gravity compressed air energy storage system - Google Patents
Heat accumulating type gravity compressed air energy storage system Download PDFInfo
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- CN115031153B CN115031153B CN202210719698.7A CN202210719698A CN115031153B CN 115031153 B CN115031153 B CN 115031153B CN 202210719698 A CN202210719698 A CN 202210719698A CN 115031153 B CN115031153 B CN 115031153B
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- 230000005484 gravity Effects 0.000 title claims abstract description 86
- 238000004146 energy storage Methods 0.000 title claims abstract description 31
- 238000007789 sealing Methods 0.000 claims abstract description 64
- 238000003860 storage Methods 0.000 claims abstract description 42
- 239000011232 storage material Substances 0.000 claims abstract description 41
- 238000005338 heat storage Methods 0.000 claims abstract description 36
- 230000006835 compression Effects 0.000 claims abstract description 11
- 238000007906 compression Methods 0.000 claims abstract description 11
- 239000012528 membrane Substances 0.000 claims description 22
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 230000001172 regenerating effect Effects 0.000 claims description 9
- 125000006850 spacer group Chemical group 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims 4
- 238000000034 method Methods 0.000 abstract description 21
- 230000008569 process Effects 0.000 abstract description 17
- 239000007789 gas Substances 0.000 description 47
- 238000010030 laminating Methods 0.000 description 5
- 210000003141 lower extremity Anatomy 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000005381 potential energy Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17B—GAS-HOLDERS OF VARIABLE CAPACITY
- F17B1/00—Gas-holders of variable capacity
- F17B1/02—Details
- F17B1/04—Sealing devices for sliding parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17B—GAS-HOLDERS OF VARIABLE CAPACITY
- F17B1/00—Gas-holders of variable capacity
- F17B1/02—Details
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention provides a heat accumulating type gravity compressed air energy storage system, which comprises a vertical shaft, wherein a gravity plunger is movably inserted in the vertical shaft, and a sealing assembly is connected between the gravity plunger and the vertical shaft, so that the gravity plunger, the sealing assembly and the vertical shaft are positioned in a space below the gravity plunger to form a sealed air storage cavity; the gravity plunger comprises a shell and a heat storage material filled in the shell, a first air vent communicated with the air storage cavity is arranged at the bottom of the shell, and an air compressor and an air expander are connected at the top of the shell. The gravity plunger is directly filled with the heat storage material, compressed gas and gas introduced into the air expander in the expansion process enter the heat storage material, heat exchange in the compression and expansion processes is realized through the heat storage material, a heat exchange unit is not needed to be additionally arranged, and meanwhile, the heat storage material is used as a gravity source, so that the whole energy storage system is simple, the cost is reduced, and the occupied area is reduced.
Description
Technical Field
The invention relates to the technical field of electric energy storage, in particular to a heat accumulating type gravity compressed air energy storage system.
Background
The storage of compressed gas has great significance for industrial production and daily life, such as natural gas, medical oxygen, compressed air energy storage and the like for thermal power plants. In the aspect of gravity compressed air energy storage, a gravity block is arranged in a vertical shaft, the gravity block is in sealing connection with the vertical shaft through a sealing film, a sealed air storage cavity is formed in the vertical shaft below the gravity block, high-pressure air is conveniently stored, and a gravity compressed air energy storage system and a working method thereof are disclosed in the patent number CN111237144A, and the gravity compressed air energy storage system comprises an air compression unit, an air expansion unit, an air storage chamber, a weight and a generator; an air inlet device is connected to an inlet of the air compression unit, an outlet of the air compression unit is connected with an inlet of the air storage chamber through an energy storage pipeline, an outlet of the air storage chamber is connected with an inlet of the air expansion unit through an energy release pipeline, and an outlet of the air expansion unit is connected with a generator; a heat exchange unit is arranged between the energy storage pipeline and the energy release pipeline; the weight is arranged on the upper part of the air storage chamber and forms a piston-cylinder system with the air storage chamber, and a sealing device is arranged between the weight and the air storage chamber. The heat exchange unit is arranged between the energy storage pipeline and the energy release pipeline to realize heat storage in the energy storage process and release the stored capacity in the energy release process, but the heat exchange unit is required to be additionally arranged, so that the energy storage system is complex, and the occupied area is increased.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the invention aims to provide a heat accumulating type gravity compressed air energy storage system, wherein a gravity plunger is directly filled with a heat accumulating material, compressed gas and gas introduced into an air expander in the expansion process enter the heat accumulating material, heat exchange in the compression and expansion processes is realized through the heat accumulating material, and a heat exchange unit is not required to be additionally arranged, so that the whole energy storage system is simple, and the occupied area is reduced.
In order to achieve the above purpose, the heat accumulating type gravity compressed air energy storage system provided by the invention comprises a vertical shaft, wherein a gravity plunger is movably inserted in the vertical shaft, and a sealing assembly is connected between the gravity plunger and the vertical shaft, so that the gravity plunger, the sealing assembly and the vertical shaft are positioned in a space below the gravity plunger to form a sealed air storage cavity;
The gravity plunger comprises a shell and a heat storage material filled in the shell, a first air vent communicated with the air storage cavity is formed in the bottom of the shell, an air compressor and an air expander are respectively connected to the top of the shell through an air inlet channel and an air outlet channel, the air expander is connected with a generator, so that high-temperature gas obtained after compression of the air compressor is introduced into the shell when energy is stored, the high-temperature gas passes through the heat storage material and then is introduced into the air storage cavity through the first air vent, and gas in the air storage cavity is introduced into the shell through the heat storage material and then enters the air expander when energy is released.
Further, two second air vents are arranged on the shell and are respectively connected with the air compressor and the air expander, and the second air vents and the first air vents are respectively positioned on two sides of the heat storage material, so that gas introduced into the air storage cavity through the air compressor and gas introduced into the air expander through the air storage cavity pass through the heat storage material.
Further, valves are arranged at the two second air inlets, and the two valves are respectively connected with the air inlet channel and the air outlet channel.
Further, the first vent and the second vent are both provided with a barrier net to block the thermal storage material through the barrier net.
Further, the sealing assembly is a sealing film sleeved outside the gravity plunger, the sealing film is of an annular cylindrical structure, an annular saddle surface structure formed by connecting an outer ring and an inner ring is formed by inwards folding the upper part of the sealing film from the middle, the bottom end of the outer ring is in sealing connection with the inner wall of the vertical shaft, and the bottom end of the inner ring is in sealing connection with the outer wall of the gravity plunger.
Further, still include the reinforcing clamp, the reinforcing clamp sets up on the sealing membrane and be located the sealing membrane top, the reinforcing clamp is the ring saddle face structure, the concave surface orientation of ring saddle face structure the sealing membrane sets up, so that under the pressure effect will the outer loop with the inner ring junction upwards props up and forms the arc, curved convex surface is laminated with the concave surface of reinforcing clamp.
Further, the reinforcing clamp includes outer clamping hoop and interior clamping hoop, outer clamping hoop with the top of interior clamping hoop is connected and is formed annular saddle face structure, outer clamping hoop with the lower limb of interior clamping hoop all sets up to the wedge, so that outer clamping hoop's lower limb with the lower limb of interior clamping hoop respectively with shaft inner wall with gravity plunger outer wall forms continuous domatic, realizes outer loop with interior ring is in outer clamping hoop's lower limb department with interior clamping hoop's lower limb department's smooth laminating transition.
Further, the inner wall surface of the vertical shaft, the outer wall surface of the gravity plunger, the outer wall surface of the outer clamping hoop and the inner wall surface of the inner clamping hoop are smooth surfaces, and the outer wall surface of the outer clamping hoop and the inner wall surface of the inner clamping hoop are respectively contacted with the inner wall surface of the vertical shaft and the outer wall surface of the gravity plunger.
Additional aspects and advantages of the invention 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 invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
Fig. 1 is a schematic structural diagram of a regenerative gravity compressed air energy storage system according to an embodiment of the present invention.
FIG. 2 is a partial cross-sectional view of the seal membrane of the present invention after installation;
FIG. 3 is a partial cross-sectional view of the seal membrane and reinforcement clip of the present invention after installation;
In the figure, 1, a vertical shaft; 2. a gravity plunger; 21. a housing; 22. a heat storage material; 23. a first vent; 24. a second vent; 25. an isolation net; 26. smoothing the groove; 3. a seal assembly; 31. an outer ring; 32. an inner ring; 4. a gas storage chamber; 5. an air compressor; 6. an air expander; 7. a valve; 8. an air intake passage; 9. an air outlet channel; 10. reinforcing the clamp; 101. an outer clamping hoop; 102. an inner clamping hoop; 103. wedge-shaped.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention. On the contrary, the embodiments of the invention include all alternatives, modifications and equivalents as may be included within the spirit and scope of the appended claims.
Fig. 1 is a schematic structural diagram of a regenerative gravity compressed air energy storage system according to an embodiment of the present invention.
Referring to fig. 1 and 2, a regenerative gravity compressed air energy storage system comprises a vertical shaft 1, a gravity plunger 2 is movably inserted in the vertical shaft 1, and a sealing assembly 3 is connected between the gravity plunger 2 and the vertical shaft 1, so that a sealed air storage cavity 4 is formed by enclosing the gravity plunger 2, the sealing assembly 3 and the vertical shaft 1 between the space below the gravity plunger 2.
The gravity plunger 2 comprises a shell 21 and a heat storage material 22 filled in the shell 21, a first air vent 23 is arranged at the bottom of the shell 21, an air compressor 5 and an air expander 6 are respectively connected with the top of the shell 21 through an air inlet channel 8 and an air outlet channel 9, the air expander 6 is connected with a generator, so that high-temperature gas obtained after compression of the air compressor 5 during energy storage is introduced into the shell 21 through the heat storage material 22 and then introduced into the gas storage cavity 4 through the first air vent 23, and gas in the gas storage cavity 4 during energy release is introduced into the shell 21 through the first air vent 23 and then introduced into the air expander 6 through the heat storage material 22, heat is directly stored in the heat storage material 22 during compression of the high-temperature gas compressed by the air compressor 5, and the gas after heat release is introduced into the gas storage cavity 4 through the first air vent 23 for storage, the gas stored in the gas storage cavity 4 enters the shell 21 in the expansion process, the gravity plunger 2 moves downwards, the volume of the gas storage cavity 4 is reduced, when the gas entering the shell 21 passes through the heat storage material 22, the heat stored in the heat storage material 22 is taken away, high-temperature gas is obtained, the high-temperature gas is directly introduced into the air expander 6 to do work, the generator is driven to generate electricity, the gravity plunger 2 is directly filled with the heat storage material, heat exchange is realized in a heat storage mode through the heat storage material, a heat exchanger is not required to be additionally arranged in the system for heat exchange, the space and the cost are saved, the heat storage material is used as a gravity source, the whole energy storage system is simple, the cost is reduced, the occupied area is reduced, in addition, in order to ensure that a certain space is reserved in the initial gas storage cavity 4 of the gravity plunger 2, compressed air is introduced, an annular locking platform can be arranged below the inner wall of the vertical shaft 1, the gravity plunger 2 is supported through the locking platform when moving downwards to the lowest limit, and at the moment, a certain space is reserved in the air storage cavity 4 so as to be convenient for introducing compressed air, so that the compressed air in the air storage cavity 4 at the initial stage of starting can jack up the gravity plunger 2.
In some embodiments, two second air ports 24 are disposed on the housing 21, and the two second air ports 24 are respectively connected with the air compressor 5 and the air expander 6, so that the high-temperature gas compressed by the air compressor 5 is introduced into the housing 21 through one second air port 24, meanwhile, in the expansion process, the gas entering the housing 21 from the gas storage cavity 4 is introduced into the air expander 6 through the other second air port 24, and because the air inlet channel 8 and the air outlet channel 9 are located at the top of the housing 21, the first air port 23 is located at the bottom of the housing 21, so that the air introduced into the gas storage cavity 4 through the air compressor 5 and the air introduced into the air expander 6 through the air storage cavity 4 both pass through the heat storage material 22, and the compressed high-temperature gas can fully absorb heat through the heat storage material 22, and the gas before being introduced into the air expander 6 in the expansion process can fully absorb the heat stored in the heat storage material 22.
In some embodiments, in order to ensure the tightness of the gravity plunger 2 in the compressed gas process and the gas expansion process, the two second air inlets 24 are respectively provided with a valve 7, and the two valves 7 are respectively connected with the air inlet channel 8 and the air outlet channel 9, so that the valve 7 at the second air inlet 24 connected with the air expander 6 is in a closed state in the compressed air process, high-temperature gas cannot directly enter the air expander 6, and meanwhile, the valve 7 at the second air inlet 24 connected with the air compressor 5 is in a closed state in the expansion process, so that the gas absorbing the heat in the heat storage material 22 can be fully introduced into the air expander 6.
In order to ensure that the thermal storage material 22 can be enclosed in the case 21 without spilling out, a spacer screen 25 may be provided at each of the first vent 23 and the second vent 24 to block the thermal storage material 22 by the spacer screen 25, that is, the case 21 may be divided into a cylindrical body and a lid body, the lid body is fitted on the top of the cylindrical body, the first vent 23 is provided at the bottom of the cylindrical body, then the spacer screen 25 is fixed at the first vent 23, then the thermal storage material 22 is filled therein, and two second vents 24 are opened on the lid body, and the spacer screen 25 is fixed at each of the two second vents 24, then the lid body is fitted on the cylindrical body, the mesh hole on the spacer screen 25 is smaller than the diameter of the thermal storage material 22, the thermal storage material 22 can be prevented from spilling out due to the blocking of the spacer screen 25, and the gas can also pass through the mesh hole on the spacer screen 25.
In some embodiments, it should be noted that the structure of the seal assembly 3 may be varied.
Referring to fig. 2, as a possible structure, the sealing assembly 3 may be a sealing film sleeved outside the gravity plunger 2, the sealing film is in an annular cylindrical structure and is directly sleeved outside the gravity plunger 2, the sealing film is turned over from the middle to the upper part to form an annular saddle surface structure formed by connecting the outer ring 31 and the inner ring 32, the top end of the outer ring 31 is connected with the top end of the inner ring 32, the bottom end of the outer ring 31 (i.e. the end far away from the connection of the outer ring 31 and the inner ring 32) is in sealing connection with the inner wall of the vertical shaft 1, the bottom end of the inner ring 32 is in sealing connection with the outer wall of the gravity plunger 2, at this time, a long distance is bent between the outer ring 31 and the inner ring 32, the change of the position when the gravity plunger 2 moves up and down can be adapted, in order to ensure that the sealing film can be fixedly connected with the vertical shaft 1 and the gravity plunger 2, the vertical shaft 1 may be provided in a cylindrical structure, the outer diameter of the sealing film is equal to the inner diameter of the vertical shaft 1, so that the outer ring 31 can be tightly fixed by the vertical shaft 1, the bottom end of the inner ring 32 is pulled to the outer wall of the gravity plunger 2 to be fixed after being folded, at the moment, the bottom end of the inner ring 32 can be sleeved outside the inner ring 32 through a steel hoop, the inner ring 32 is tightly pressed on the shell 21 through the steel hoop and is fixed through bolts, in the fixing process, as the fold bulge is not connected with the outer wall of the shell 21, the joint point between the sealing film and the gravity plunger 2 is reduced, the condition that air leakage occurs at the fold bulge is easy to occur is caused, therefore, a plurality of smooth grooves 26 which are vertically distributed are formed on the periphery of the outer wall surface of the shell 21 of the gravity plunger 2, wherein the vertical direction is consistent with the axial direction of the shell 21, the periphery of the inner ring 32 obtained after the sealing film is folded forms fold bulge, the bottom end of the inner ring 32 is in sealing connection with the outer wall of the gravity plunger 2, fold protrusion and smooth recess 26 laminating, through the setting above, allow the sealing membrane to be sunken in smooth recess 26, thereby increase the outside wall of casing 21 ring and sealing membrane phase length, make the sealing membrane fix the length increase at casing 21 week side, the outer loop 31 and the inner loop 32 of sealing membrane remain the good laminating with shaft 1 inner wall all the time in gravity plunger 2 reciprocates the in-process, the outer wall of casing 21 laminating well, the laminating site between casing 21 and the sealing membrane has been promoted, the bonding stability of sealing membrane and gravity plunger 2 has been promoted, and because the external diameter of sealing membrane is the same with the internal diameter of shaft 1, and then make the outer loop 31 of sealing membrane laminate completely on shaft 1 inner wall, offset the hoop tension that the sealing membrane produced under the pressure condition through casing 21 solid wall, promote sealing membrane safety in utilization, reliability and life-span.
In addition, after the circumference side of the casing 21 is provided with the smooth grooves 26, by controlling the depth and the number of the smooth grooves 26, the circumferential circumference of the casing 21 at the smooth grooves 26 is increased (that is, the circumferential circumference of the smooth grooves 26 penetrating through the bottom end of the casing 21, that is, the circumferential circumference of the bottom end face side of the casing 21, and the circumferential circumference of the outer wall of the sealing film is the circumferential circumference of the end face side of the outer cylinder of the annular cylindrical structure of the sealing film), when the circumferential part including the fold protrusions of the inner ring 32 is controlled, the circumferential part including the groove bottom of the smooth grooves 26 is attached to the circumference side of the casing 21, so that the inner ring 32 can be attached to the casing 21, the casing 21 can fully support the sealing film, and the use safety, reliability and service life of the sealing film are improved.
In addition, referring to fig. 3, when the pressure in the gas storage cavity is high, a high pressure exists between the outer ring 31 and the inner ring 32, so that a part between the outer ring 31 and the inner ring 32 is propped up to form an annular saddle surface structure, as the side sides of the outer ring 31 and the inner ring 32 are respectively connected to the vertical shaft 1 and the gravity plunger 2, and the middle parts of the outer ring 31 and the inner ring 32 are subjected to the high pressure of the gas storage cavity 4, the sealing film can be possibly torn, so that a sealing film with high strength is required to be prepared, the preparation difficulty and the cost are increased, and therefore, in order to enhance the safety and the reliability, the reinforcing clamp 10 is also arranged, the reinforcing clamp 10 is arranged on the sealing film and is positioned above the sealing film, the concave surface of the annular saddle surface structure is arranged towards the sealing film, so that the joint of the outer ring 31 and the inner ring 32 is propped up to form an arc shape under the pressure, the arc shape convex surface is attached to the concave surface of the reinforcing clamp 10, the middle part of the sealing film can be effectively prevented from being torn under the pressure effect, and the service life of the sealing film is prolonged.
In some embodiments, the reinforcement clip 10 includes an outer clip 101 and an inner clip 102, with the top ends of the outer clip 101 and the inner clip 102 being connected to form an annular saddle surface structure, and the lower edges of the outer clip 101 and the inner clip 102 each being provided with a wedge 103, such that the lower edges of the outer clip 101 and the inner clip 102 form continuous slopes with the inner wall surface of the shaft 1 and the outer wall surface of the gravity plunger 2, respectively, to achieve a smooth fit transition of the outer ring 31 and the inner ring 32 at the lower edge of the outer clip 101 and the lower edge of the inner clip 102.
In addition, the inner wall surface of the vertical shaft 1, the outer wall surface of the gravity plunger 2, the outer wall surface of the outer clamping hoop 101 and the inner wall surface of the inner clamping hoop 102 are smooth surfaces, and the outer wall surface of the outer clamping hoop 101 and the inner wall surface of the inner clamping hoop 102 are respectively in contact with the inner wall surface of the vertical shaft 1 and the outer wall surface of the gravity plunger 2, so that the friction force when the reinforcing clamp 10 moves up and down is reduced, and the reinforcing clamp 10 can move with low friction.
According to the above embodiments, in some embodiments, a heat accumulating type gravity compressed air energy accumulating method comprises the following steps:
Step 1: when energy is stored, the air inlet channel 8 is opened, the air outlet channel 9 is closed, when the output power of the wind power generation or solar power generation unit matched with the system exceeds the power grid dispatching requirement, the unit drives the air compressor 5 to do work on gas through the motor, the normal temperature and pressure air is compressed to obtain high temperature and high pressure air, the high temperature and high pressure air is introduced into the gravity plunger 2 and passes through the heat storage material 22, then heat is stored in the heat storage material 22 to obtain low temperature and high pressure gas, the low temperature and high pressure gas is introduced into the gas storage cavity 4, the low temperature and high pressure gas pushes the gravity plunger 2 to move upwards in the gas storage cavity 4, electric energy is converted into pressure potential energy of compressed air, compression heat energy stored in the heat storage material 22 and gravitational potential energy of the gravity plunger 2, and in the process of introducing the low temperature and high pressure gas into the gas storage cavity 4, the air pressure acts on the middle of the sealing film, so that the middle of the sealing film is jacked upwards to be attached with the concave surface of the saddle surface of the reinforcing clamp 10, and the air pressure pushes the gravity plunger 2 to move upwards together with the reinforcing clamp 10.
Step 2: when the energy is released, the air outlet channel 9 is opened, the air inlet channel 8 is closed, compressed gas in the gas storage cavity 4 enters the gravity plunger 2, heat stored in the heat storage material 22 is absorbed, the obtained high-temperature high-pressure gas enters the air expander 6 through the air outlet channel 9 to do work, the generator is driven to generate electricity, the gravity plunger 2 moves downwards, and the pressure potential energy of the compressed air, the compression heat energy stored in the heat storage material 22 and the gravitational potential energy of the gravity plunger 2 are converted into electric energy.
It should be noted that in the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
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 further implementations are included within the scope of the preferred embodiment of the present invention 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 invention.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," 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 present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (7)
1. The heat accumulating type gravity compressed air energy storage system is characterized by comprising a vertical shaft, wherein a gravity plunger is movably inserted in the vertical shaft, and a sealing assembly is connected between the gravity plunger and the vertical shaft, so that the gravity plunger, the sealing assembly and the vertical shaft are located in a space below the gravity plunger to form a sealed air storage cavity;
The gravity plunger comprises a shell and a heat storage material filled in the shell, a first air vent communicated with the air storage cavity is arranged at the bottom of the shell, an air compressor and an air expander are respectively connected to the top of the shell through an air inlet channel and an air outlet channel, the air expander is connected with a generator, so that high-temperature gas obtained after compression of the air compressor during energy storage is introduced into the shell, passes through the heat storage material and then is introduced into the air storage cavity through the first air vent, and gas in the air storage cavity is introduced into the shell, passes through the heat storage material and then enters the air expander during energy release;
The sealing assembly is sleeved on a sealing membrane outside the gravity plunger, the sealing membrane is of an annular cylindrical structure, a plurality of smooth grooves which are vertically distributed are formed in the periphery of the outer wall surface of the gravity plunger, the sealing membrane forms an annular saddle surface structure formed by connecting an outer ring and an inner ring after turning the upper part inwards from the middle, the periphery of the inner ring obtained after turning the sealing membrane forms a fold bulge, the bottom end of the outer ring is in sealing connection with the inner wall of the vertical shaft, the bottom end of the inner ring is in sealing connection with the outer wall of the gravity plunger, and the fold bulge is attached to the smooth grooves.
2. The regenerative gravity compressed air energy storage system of claim 1, wherein two second ventilation openings are provided at the top of the housing, the two second ventilation openings are respectively connected with the air inlet channel and the air outlet channel, and the second ventilation openings and the first ventilation openings are respectively located at two sides of the heat storage material, so that the gas introduced into the air storage cavity through the air compressor and the gas introduced into the air expansion machine through the air storage cavity pass through the heat storage material.
3. The regenerative gravity compressed air energy storage system of claim 2, wherein valves are provided at both of the second air inlets, and both of the valves are connected to the air inlet channel and the air outlet channel, respectively.
4. The regenerative, gravity-compressed air energy storage system of claim 2, wherein a spacer mesh is provided at each of the first vent and the second vent to block the thermal storage material through the spacer mesh.
5. The regenerative gravity compressed air energy storage system of claim 1, further comprising a reinforcing clip disposed on the sealing membrane and above the sealing membrane, the reinforcing clip being of saddle surface-like configuration with a concave surface of the saddle surface-like configuration facing the sealing membrane such that the junction of the outer ring and the inner ring is supported upwardly under pressure to form an arc, the convex surface of the arc conforming to the concave surface of the reinforcing clip.
6. The regenerative gravity compressed air energy storage system of claim 5, wherein the reinforcing clip comprises an outer clip ring and an inner clip ring, wherein the top ends of the outer clip ring and the inner clip ring are connected to form an annular saddle surface structure, and the lower edges of the outer clip ring and the inner clip ring are each provided with a wedge shape, so that the lower edges of the outer clip ring and the inner clip ring respectively form continuous slopes with the shaft inner wall surface and the gravity plunger outer wall surface, and smooth fit transition of the outer ring and the inner ring at the lower edges of the outer clip ring and the inner clip ring is realized.
7. The regenerative gravity compressed air energy storage system of claim 6, wherein the shaft inner wall surface, the gravity plunger outer wall surface, the outer wall surface of the outer clamp ring, and the inner wall surface of the inner clamp ring are smooth surfaces, and the outer wall surface of the outer clamp ring and the inner wall surface of the inner clamp ring are in contact with the shaft inner wall surface and the gravity plunger outer wall surface, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210719698.7A CN115031153B (en) | 2022-06-23 | 2022-06-23 | Heat accumulating type gravity compressed air energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210719698.7A CN115031153B (en) | 2022-06-23 | 2022-06-23 | Heat accumulating type gravity compressed air energy storage system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115031153A CN115031153A (en) | 2022-09-09 |
| CN115031153B true CN115031153B (en) | 2024-05-07 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10231995A (en) * | 1997-02-18 | 1998-09-02 | Nippon Jabara Kogyo Kk | Gas seal film for diaphragm type gas holder |
| CN201010138Y (en) * | 2007-03-23 | 2008-01-23 | 鹿纯桤 | Easily opened plastic bag |
| JP2013188925A (en) * | 2012-03-13 | 2013-09-26 | Inoac Corp | Method for producing rigid foamed molding, and foaming mold with bag-like body used for the same |
| CN104567186A (en) * | 2015-01-21 | 2015-04-29 | 合肥华凌股份有限公司 | Refrigerator |
| CN106137339A (en) * | 2016-08-02 | 2016-11-23 | 成都五义医疗科技有限公司 | A kind of perforator diaphragm seal of the fold-type of improvement |
| CN206870853U (en) * | 2017-01-22 | 2018-01-12 | 浙江宏利汽车零部件有限公司 | A kind of rubber and plastic alloy dirt-proof boot |
| CN110550375A (en) * | 2019-08-01 | 2019-12-10 | 清华大学 | Heat accumulating type compressed air energy storage device |
| 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 |
| CN216043933U (en) * | 2021-08-12 | 2022-03-15 | 西安热工研究院有限公司 | Air storage device for gravity compressed air energy storage |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106137340B (en) * | 2016-08-02 | 2017-08-25 | 成都五义医疗科技有限公司 | A kind of puncture outfit diaphragm seal containing groove structure |
| EP3794270A4 (en) * | 2018-05-17 | 2022-03-09 | Hydrostor Inc. | A hydrostatically compensated compressed gas energy storage system |
-
2022
- 2022-06-23 CN CN202210719698.7A patent/CN115031153B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10231995A (en) * | 1997-02-18 | 1998-09-02 | Nippon Jabara Kogyo Kk | Gas seal film for diaphragm type gas holder |
| CN201010138Y (en) * | 2007-03-23 | 2008-01-23 | 鹿纯桤 | Easily opened plastic bag |
| JP2013188925A (en) * | 2012-03-13 | 2013-09-26 | Inoac Corp | Method for producing rigid foamed molding, and foaming mold with bag-like body used for the same |
| CN104567186A (en) * | 2015-01-21 | 2015-04-29 | 合肥华凌股份有限公司 | Refrigerator |
| CN106137339A (en) * | 2016-08-02 | 2016-11-23 | 成都五义医疗科技有限公司 | A kind of perforator diaphragm seal of the fold-type of improvement |
| CN206870853U (en) * | 2017-01-22 | 2018-01-12 | 浙江宏利汽车零部件有限公司 | A kind of rubber and plastic alloy dirt-proof boot |
| CN110550375A (en) * | 2019-08-01 | 2019-12-10 | 清华大学 | Heat accumulating type compressed air energy storage device |
| 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 |
| CN216043933U (en) * | 2021-08-12 | 2022-03-15 | 西安热工研究院有限公司 | Air storage device for gravity compressed air energy storage |
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