CN216240804U - Compressed gas energy storage system - Google Patents

Abstract

The utility model discloses a compressed gas energy storage system which comprises a compressed gas energy storage unit and a gas storage assembly, wherein the gas storage assembly comprises a first liquid storage tank and a gas storage piece, the gas storage piece extends along a first direction, an included angle is formed between the first direction and an up-down direction, the gas storage piece is respectively communicated with the compressed gas energy storage unit and the first liquid storage tank, the gas storage piece has a first state and a second state, the compressed gas energy storage unit stores energy in the first state, the gas storage piece is used for storing compressed gas flowing out of the compressed gas energy storage unit, the compressed gas energy storage unit releases energy in the second state, and the gas storage piece is used for storing liquid flowing out of the first liquid storage tank. The compressed gas energy storage system has the advantages of simple structure, high gas storage efficiency, low cost and the like.

Description

Compressed gas energy storage system

Technical Field

The utility model relates to the technical field of gas storage, in particular to a compressed gas energy storage system and a compressed gas energy storage system.

Background

Compressed air energy storage is a power energy storage system capable of realizing large-capacity and long-time electric energy storage, and the compressed air energy storage system stores redundant power in a mode that normal pressure air is compressed to high pressure and stored, releases high pressure air and expands to do work to generate power when power is needed, and the energy storage efficiency can reach 70%.

In the related technology, the compressed air energy storage power station adopts the gas storage in a fixed volume form, and the gas storage is difficult to build and has higher investment.

SUMMERY OF THE UTILITY MODEL

The present invention is based on the discovery and recognition by the inventors of the following facts and problems:

the air storage in the compressed air energy storage system in the related art is in a fixed volume mode, the air storage operates in a certain upper limit pressure range and a certain lower limit pressure range, and when the pressure of the air storage reaches the lower limit pressure, the air cannot be continuously exhausted to push the expansion machine to do work. The inventor of the application finds that the gas storage base gas in the compressed air energy storage system in the related art reaches 60-70% of gas amount, which causes great waste of the compressed gas.

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the utility model provides a compressed gas energy storage system which is simple in structure, low in cost and small in occupied area.

The embodiment of the utility model provides a compressed gas energy storage system which is high in practicability and capable of reducing waste of compressed air.

The compressed gas energy storage system of the embodiment of the utility model comprises: a compressed gas energy storage unit; the gas storage subassembly, the gas storage subassembly includes first liquid storage tank and gas storage spare, the gas storage spare extends along the first direction, the first direction becomes the contained angle with upper and lower direction, the gas storage spare respectively with compressed gas energy storage unit with first liquid storage tank intercommunication, the gas storage spare has first state and second state the first state, compressed gas energy storage unit energy storage, the gas storage spare is used for storing the compressed gas that compressed gas energy storage unit flows the second state, compressed gas energy storage unit energy release, the gas storage spare is used for storing the liquid that first liquid storage tank flows.

According to the compressed gas energy storage system provided by the embodiment of the utility model, the first liquid storage tank and the gas storage piece are arranged, so that the waste of compressed air is reduced, the utilization rate of the compressed air is improved, and the manufacturing cost of the gas storage component is reduced.

In some embodiments, the first reservoir is formed on a hill having a tunnel, the air reservoir being provided within the tunnel.

In some embodiments, the compressed gas energy storage system further comprises a second reservoir formed on the mountain and communicating with the tunnel for delivering liquid to the tunnel to counteract the internal pressure of the gas reservoir.

In some embodiments, the lowest point in the first reservoir is at a higher level than the highest point in the second reservoir, such that the internal pressure of the accumulator is greater than the external pressure of the accumulator.

In some embodiments, the bottom of the first reservoir is in communication with the gas reservoir and the bottom of the second reservoir is in communication with the tunnel.

In some embodiments, the lowest point in the first reservoir and the lowest point in the second reservoir are both at a higher level than the air scoop.

In some embodiments, the compressed gas energy storage system further comprises a plugging assembly, the gas storage member penetrates through the plugging assembly, and the plugging assembly is arranged in the tunnel and used for plugging the tunnel.

In some embodiments, the plurality of air storage members are connected to each other, the plurality of air storage members are divided into a plurality of rows, the plurality of rows of air storage members are arranged at intervals in the vertical direction, and each row of air storage members is arranged at intervals in the vertical direction.

In some embodiments, the compressed gas energy storage system further comprises a support plate disposed between two adjacent rows of the gas storage members.

In some embodiments, the plurality of rows of air reservoirs includes an uppermost row of air reservoirs in communication with the compressed gas energy storage unit and a lowermost row of air reservoirs in communication with the first reservoir.

Drawings

Fig. 1 is a schematic structural view of a compressed gas energy storage system according to an embodiment of the present invention.

Reference numerals:

a compressed gas energy storage system 100;

a compressed gas energy storage unit 1;

a gas storage component 2; a first reservoir 21; a first liquid outlet 211;

a gas storage member 22; a first exhaust gas storage 221; the second exhaust gas storage 222; the third exhaust gas storage 223; a fourth row air reservoir 224;

a mountain body 3; a tunnel 31;

a second reservoir 4; a second liquid outlet 41; a plugging component 5; and a support plate 6.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

A compressed gas energy storage system according to an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1, the compressed gas energy storage system according to the embodiment of the present invention includes a compressed gas energy storage unit 1 and a gas storage assembly 2.

The gas storage component 2 comprises a gas storage component 2 comprising a first liquid storage tank 21 and a gas storage piece 22, the gas storage piece 22 extends along a first direction (the left direction and the right direction shown in fig. 1), an included angle is formed between the first direction and the up-down direction, the gas storage piece 22 is respectively communicated with the compressed gas energy storage unit 1 and the first liquid storage tank 21, the gas storage piece 22 has a first state and a second state, the compressed gas energy storage unit 1 stores energy in the first state, the gas storage piece 22 is used for storing compressed gas flowing out of the compressed gas energy storage unit 1, and in the second state, the compressed gas energy storage unit 1 releases energy, and the gas storage piece 22 is used for storing liquid flowing out of the first liquid storage tank 21.

Specifically, as shown in fig. 1, the gas storage member 22 is a pipe extending in the left-right direction and having two ends both sealed, the gas storage member 22 is communicated with the compressed gas energy storage unit 1 and the first liquid storage tank 21, in the first state, the compressed gas energy storage unit 1 stores compressed energy for storing gas and transmits the compressed gas to the gas storage member 22, in the second state, the compressed gas energy storage unit 1 stores energy and releases energy, and the compressed gas stored in the gas storage member 22 is discharged into the compressed gas energy storage unit 1 for releasing energy, meanwhile, the first liquid storage tank 21 charges liquid into the gas storage member 22, and keeps the pressure in the gas storage member 22 substantially constant, so that the compressed gas in the gas storage member 22 is completely discharged out of the gas storage member 22 by the pressure of the liquid, and at this time, the gas storage member 22 is filled with the liquid.

According to the compressed gas energy storage system 100 provided by the embodiment of the utility model, the gas storage assembly 2 comprises the first liquid storage tank 21 and the gas storage piece 22, so that the compressed gas in the gas storage piece 22 is completely discharged out of the gas storage piece 22 through the liquid in the first liquid storage tank 21, the waste of the compressed gas is reduced, the utilization rate of the compressed gas is improved, and the economic benefit of the compressed gas energy storage system 100 is ensured.

In some embodiments, the first reservoir 21 is formed on the mountain 3, the mountain 3 has a tunnel 31, and the gas storage member 22 is disposed in the tunnel 31. Specifically, as shown in fig. 1, the first liquid storage tank 21 is formed on the top of the mountain 3, a tunnel 31 extending in the left-right direction is provided under the foot of the mountain 3, one part of the gas storage component 22 horizontally penetrates through the tunnel 31, and the other part of the gas storage component extends out of the tunnel 31 and is communicated with the first liquid storage tank 21 and the compressed gas energy storage unit 1, so that the gas storage component 2 is more reasonably arranged.

Since the compressed gas or liquid is stored in the gas storage member 22, the gas storage member 22 will be subjected to a tensile stress, so that the service life of the gas storage member 22 is reduced, and therefore, in order to reduce the tensile stress applied to the gas storage member 22 and improve the service life of the gas storage member 22, in some embodiments, the compressed gas energy storage system 100 further includes a second liquid storage tank 4, and the second liquid storage tank 4 is formed on the mountain 3 and is communicated with the tunnel 31 and used for conveying the liquid to the tunnel 31 to offset the internal pressure of the gas storage member 22. Specifically, as shown in fig. 1, the second reservoir 4 stores liquid, the second reservoir 4 is formed on the waist of the mountain 3, the second reservoir 4 is communicated with the tunnel 31 through a pipe, and the liquid is transported into the tunnel 31 through the second reservoir 4, so that the liquid in the tunnel 31 generates a compressive stress on the outer peripheral side of the gas storage member 22 to offset the tensile stress inside the gas storage member 22.

In some embodiments, the lowest point in the first reservoir 21 is at a higher level than the highest point in the second reservoir 4, so that the internal pressure of the gas reservoir 22 is greater than the external pressure of the gas reservoir 22. Therefore, the maximum pressure borne by the gas storage part 22 is the pressure of the water in the first liquid storage tank 21 on the gas storage part 22, and the service life of the gas storage part 22 is further prolonged.

In some embodiments, the bottom of the first reservoir 21 is in communication with the gas reservoir 22, and the bottom of the second reservoir 4 is in communication with the tunnel 31. Specifically, as shown in fig. 1, a first liquid outlet 211 is disposed at the bottom of the first liquid storage tank 21, a second liquid outlet 41 is disposed at the bottom of the second liquid storage tank 4, the first liquid outlet 211 is communicated with the gas storage 22, and the second liquid outlet 41 is communicated with the tunnel 31. Thereby, the liquid in the first reservoir 21 and the liquid in the second reservoir 4 are fully utilized.

In some embodiments, the lowest point in the first reservoir 21 and the lowest point in the second reservoir 4 are both at a higher level than the gas reservoir 22. Specifically, as shown in fig. 1, the first liquid storage tank 21 is disposed on the top of the mountain 3, the second liquid storage tank 4 is disposed on the waist of the mountain 3, and the gas storage member 22 is disposed in the tunnel 31 under the foot of the mountain 3, so as to ensure that the liquid flowing into the gas storage member 22 from the first liquid storage tank 21 has a certain pressure, so that the pressure in the gas storage member 22 is kept constant in the first state and the second state, and the liquid flowing into the tunnel 31 from the second liquid storage tank 4 has a certain pressure, so that the internal and external pressures of the gas storage member 22 are offset.

It can be understood that, in order to ensure the pressure in the air storage part 22, the first liquid storage tank 21 may further be provided with a water pump, and the water pump may be used to convey liquid to the air storage part 22, so as to ensure that the pressure in the air storage part 22 is kept constant in both the first state and the second state.

In some embodiments, the compressed gas energy storage system 100 further comprises a plugging assembly 5, the gas storage member 22 penetrates through the plugging assembly 5, and the plugging assembly 5 is disposed in the tunnel 31 for plugging the tunnel 31. Specifically, as shown in fig. 1, the plugging component 5 is a plugging member made of cement and is disposed in the tunnel 31 to plug the tunnel 31, so as to prevent the liquid in the second liquid storage tank 4 from flowing away, the gas storage member 22 penetrates through the plugging component 5, a part of the gas storage member 22 is located at the left end of the plugging component 5 and is located in the tunnel 31, and another part of the gas storage member 22 is located at the right end of the plugging component 5 and is communicated with the compressed gas energy storage unit 1 and the first liquid storage tank 21.

In some embodiments, the number of the air reservoirs 22 is multiple, the air reservoirs 22 are communicated with each other, the air reservoirs 22 are divided into multiple rows, the multiple rows of the air reservoirs 22 are spaced apart from each other in the vertical direction of the tunnel 31, and each row of the air reservoirs 22 is spaced apart from each other in the vertical direction. Specifically, as shown in fig. 1, the plurality of air reservoirs 22 are communicated with each other and can be divided into four rows (e.g., four rows are released in fig. 1), the 4 rows of air reservoirs 22 are arranged at intervals along the up-down direction, and each row of air reservoirs 22 is arranged at intervals along the front-rear direction, thereby improving the utilization rate of the air reservoirs 22.

In some embodiments, the compressed gas energy storage system 100 further comprises a support plate 6, and the support plate 6 is disposed in the tunnel 31 and located between the two adjacent rows of the gas storage members 22. Specifically, as shown in fig. 1, the supporting plates 6 are arranged in multiple rows, the multiple rows of supporting plates 6 are arranged at intervals in the vertical direction, a row of supporting plates 6 is arranged between two adjacent rows of air storage elements 22, and each row of supporting plates 6 is arranged at intervals in the left-right direction, so that the supporting plates 6 support the air storage elements 22, and the air storage elements 22 are prevented from being too long to incline.

In some embodiments, the plurality of rows of air reservoirs 22 includes an uppermost row of air reservoirs 22 and a lowermost row of air reservoirs 22, the uppermost row of air reservoirs 22 being in communication with the compressed gas energy storage unit 1, and the lowermost row of air reservoirs 22 being in communication with the first reservoir 21. Specifically, as shown in fig. 1, the four rows of air reservoirs 22 are sequentially a first row of air reservoirs 221, a second row of air reservoirs 222, a third row of air reservoirs 223 and a fourth row of air reservoirs 224 from top to bottom, wherein at least one air reservoir 22 on the first row of air reservoirs 221 is communicated with the compressed gas energy storage unit, at least one air reservoir 22 on the fourth row of air reservoirs 224 is communicated with the first liquid storage tank 21, liquid flows in or out from the fourth row of air reservoirs 224, and the first row of air reservoirs 221 in or out of gas, so that the liquid or gas can be completely discharged out of the air reservoirs 22.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific 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 disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A compressed gas energy storage system, comprising: a compressed gas energy storage unit; the gas storage subassembly, the gas storage subassembly includes first liquid storage tank and gas storage spare, the gas storage spare extends along the first direction, the first direction becomes the contained angle with upper and lower direction, the gas storage spare respectively with compressed gas energy storage with first liquid storage tank intercommunication, the gas storage spare has first state and second state the first state, compressed gas energy storage unit energy storage, the gas storage spare is used for storing the compressed gas that compressed gas energy storage unit flows the second state, compressed gas energy storage unit energy release, the gas storage spare is used for storing the liquid that first liquid storage tank flows.

2. The compressed gas energy storage system of claim 1, wherein the first reservoir is formed on a mountain having a tunnel, the gas storage member being disposed within the tunnel.

3. The compressed gas energy storage system of claim 2, further comprising a second reservoir formed on the mountain and in communication with the tunnel for delivering liquid to the tunnel to counteract the internal pressure of the gas reservoir.

4. A compressed gas energy storage system according to claim 3 wherein the lowest point in the first reservoir is at a higher level than the highest point in the second reservoir so that the internal pressure of the accumulator is greater than the external pressure of the accumulator.

5. The compressed gas energy storage system of claim 3, wherein the bottom of the first reservoir is in communication with the gas storage member and the bottom of the second reservoir is in communication with the tunnel.

6. A compressed gas energy storage system according to any of claims 3 to 5 wherein the level at which the lowest point in the first reservoir and the level at which the lowest point in the second reservoir are both higher than the air reservoir.

7. The compressed gas energy storage system of claim 2, further comprising a plugging assembly through which the gas storage member extends, the plugging assembly being disposed within the tunnel for plugging the tunnel.

8. The compressed gas energy storage system according to claim 1, wherein the number of the gas storage members is plural, the plural gas storage members are communicated with each other, the plural gas storage members are divided into plural rows, the plural rows of the gas storage members are arranged at intervals in an up-down direction, and each row of the gas storage members is arranged at intervals in a direction orthogonal to the up-down direction.

9. The compressed gas energy storage system of claim 8, further comprising a support plate disposed between two adjacent rows of said gas storage members.

10. The compressed gas energy storage system of claim 8, wherein the plurality of rows of gas storage elements comprises an uppermost row of gas storage elements in communication with the compressed gas energy storage unit and a lowermost row of gas storage elements in communication with the first reservoir.

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