CN220815937U - Heat accumulation gas storage device and compressed air energy storage system - Google Patents
Heat accumulation gas storage device and compressed air energy storage system Download PDFInfo
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- CN220815937U CN220815937U CN202322657885.XU CN202322657885U CN220815937U CN 220815937 U CN220815937 U CN 220815937U CN 202322657885 U CN202322657885 U CN 202322657885U CN 220815937 U CN220815937 U CN 220815937U
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- 238000004146 energy storage Methods 0.000 title claims abstract description 37
- 238000009825 accumulation Methods 0.000 title claims abstract description 10
- 238000005338 heat storage Methods 0.000 claims abstract description 121
- 230000006835 compression Effects 0.000 claims abstract description 20
- 238000007906 compression Methods 0.000 claims abstract description 20
- 239000007791 liquid phase Substances 0.000 claims description 19
- 239000012071 phase Substances 0.000 claims description 14
- 238000010248 power generation Methods 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 152
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 230000005611 electricity Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of compressed air energy storage, and provides a heat storage and gas storage device and a compressed air energy storage system. The heat storage and gas storage device comprises: the heat storage and gas storage device comprises a heat storage and gas storage device body, wherein a gas storage chamber and a heat storage cavity are arranged in the heat storage and gas storage device body, the heat storage cavity is suitable for storing a heat storage medium exchanging heat with compressed air, and the heat storage cavity is communicated with the gas storage chamber in one direction; the heat accumulation cavity is provided with a first gas outlet, the gas storage chamber is provided with a second gas outlet, and the second gas outlet is communicated with the bottom of the heat accumulation cavity. The compressed air energy storage system comprises: the device comprises an air compression module, a heat storage module, an expansion work doing module and a heat storage and gas storage device, wherein the first gas outlet is connected with the expansion work doing module. The heat storage and gas storage device and the compressed air energy storage system provided by the utility model solve the defect of low energy utilization rate of the existing compressed air energy storage, improve the energy utilization rate of the system and improve the volume utilization rate of the heat storage and gas storage device body.
Description
Technical Field
The utility model relates to the technical field of compressed air energy storage, in particular to a heat storage and gas storage device and a compressed air energy storage system.
Background
Advanced adiabatic compressed air energy storage is used as a large-scale long-term energy storage technology, and engineering demonstration of different capacity grades is realized in China. When the compressed air energy storage system absorbs energy, the air compressor is driven by renewable energy waste electricity, thermal power generation residual electricity or grid valley electricity to compress ambient air, high-temperature and high-pressure compressed air is obtained, then heat is absorbed and stored after heat exchange between the heat carrier and the air, and the air enters the air storage device after heat release and temperature reduction, so that electric energy is stored by two carriers, namely the heat carrier and the compressed air; when the energy is released, the stored compressed air exchanges heat with the stored heat-carrying medium again, the heat is absorbed, the air enters the air expander to be decompressed and do work after being heated, the generator is driven to rotate for power generation, and meanwhile, the cooled heat-carrying medium is stored, so that the regeneration of electric energy is realized.
However, in the compressed air energy storage system in the prior art, the exhaust pressure of the final stage compressor continuously rises along with the inflation process of the air storage chamber, and as the exhaust temperature of the final stage compressor continuously rises, the compressed heat energy supply of temperature cannot be provided, and generally, a cooler driven by a cold water tower is directly adopted to directly cool the final stage compressor, and heat energy is dissipated into the external environment to become heat energy loss.
Therefore, there is a need for a thermal storage and gas storage device and a compressed air energy storage system to solve the above problems.
Disclosure of utility model
The utility model provides a heat storage and gas storage device and a compressed air energy storage system, which are used for solving the defect of low energy utilization rate of compressed air energy storage in the prior art, improving the energy utilization rate of the system and improving the volume utilization rate of a heat storage and gas storage device body.
In one aspect, the present utility model provides a thermal storage gas storage device comprising: the heat storage and gas storage device comprises a heat storage and gas storage device body, wherein a gas storage chamber and a heat storage cavity are arranged in the heat storage and gas storage device body, the heat storage cavity is suitable for storing a heat storage medium exchanging heat with compressed air, and the heat storage cavity is communicated with the gas storage chamber in one direction;
The heat accumulation cavity is provided with a first gas outlet, the gas storage chamber is provided with a second gas outlet, and the second gas outlet is communicated with the bottom of the heat accumulation cavity.
According to the heat storage and gas storage device provided by the utility model, the heat storage and gas storage device body is internally provided with the unidirectional separation mechanism, and the unidirectional separation mechanism separates the inner cavity of the heat storage and gas storage device body into the gas storage chamber and the heat storage cavity.
According to the heat storage and gas storage device provided by the utility model, the heat storage cavity is internally provided with the liquid phase space and the gas phase space, the liquid phase space is suitable for storing a heat storage medium for heat exchange with compressed air, the gas phase space is positioned above the liquid phase space, and the first gas outlet is arranged in the gas phase space.
According to the heat storage and gas storage device provided by the utility model, a heat exchange structure is arranged in the liquid phase space.
According to the heat storage and gas storage device provided by the utility model, the upper side and the lower side of the heat exchange structure are respectively provided with the partition plate, and the partition plate is provided with the gas through holes suitable for passing gas.
According to the heat storage and gas storage device provided by the utility model, the air distribution area is arranged below the heat exchange structure.
According to the heat storage and gas storage device provided by the utility model, the heat exchange structure is a heat exchange fin.
According to the heat storage and gas storage device provided by the utility model, the heat storage medium is water or heat storage oil.
In another aspect, the utility model provides a compressed air energy storage system, which comprises an air compression module, a heat storage module, an expansion work module and the heat storage and gas storage device according to any one of the above, wherein the first gas outlet is connected with the expansion work module.
The compressed air energy storage system provided by the utility model further comprises a power generation module, wherein the power generation module is connected with the expansion work module.
The working principle of the heat storage and gas storage device and the compressed air energy storage system provided by the utility model is as follows:
According to the heat storage and gas storage device and the compressed air energy storage system, the gas storage chamber and the heat storage cavity are arranged in the heat storage and gas storage device body, when the system is inflated and stores energy, air compressed and discharged by the non-constant pressure air compressor in the air compression module firstly enters the heat storage cavity from the bottom to exchange heat with a preset heat storage medium in the heat storage cavity, heat is stored in the heat storage medium, and the air subjected to heat exchange flows in one direction to the gas storage chamber to be stored for later use; when the system is in deflation power generation, compressed air flows out from the second gas outlet and enters the heat storage cavity from the bottom to exchange heat with the heat storage medium storing heat, part of high-temperature air after heat exchange enters the expansion working module through the first gas outlet to preheat the air inlet of the expansion machine, and the other part of high-temperature air reenters the air storage chamber to raise the temperature in the air storage chamber. The heat exchange structure arranged in the heat storage cavity can enable air to flow through the surface of the heat storage cavity in a uniformly dispersed manner, so that the contact area between the heat storage cavity and a heat storage medium is enlarged, and the heat exchange effect is enhanced.
According to the heat storage and gas storage device and the compressed air energy storage system, through reasonable arrangement of the structure of the heat storage and gas storage device body and the charging and discharging process, non-constant-temperature compression heat energy in the exhaust gas of the non-constant-pressure compression section can be stored and fed into the system, and heat energy loss is avoided; in addition, by utilizing the stored compression heat energy, the air inlet of the expander can be preheated in the air release process, so that the regenerative utilization of the stored heat energy is realized; meanwhile, part of stored compressed heat energy can enter the air storage chamber along with preheated compressed air, so that the temperature drop of the air storage chamber in the air release process is counteracted, and even the temperature of the air storage chamber is increased, so that the compressed air is discharged from the air storage chamber as much as possible in the same operating pressure range, and the volume utilization rate of the air storage chamber is increased.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a thermal storage gas storage device provided by an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a compressed air energy storage system provided by an embodiment of the present utility model;
fig. 3 is a schematic diagram of a compressed air energy storage system of the prior art.
Reference numerals:
1. An air storage chamber; 2. a heat storage chamber; 201. a first gas outlet; 202. a second gas outlet; 203. a liquid phase space; 2031. an air distribution area; 204. a gas phase space; 3. a unidirectional separation mechanism; 4. a heat exchange fin; 5. a partition plate; 6. a heat storage and gas storage device; 7. a first air compressor; 8. a second air compressor; 9. a first heat exchanger; 10. a first expander; 11. a second expander; 12. a second heat exchanger; 13. a third heat exchanger; 14. and a heat storage module.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.
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 embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed 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, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Overview of the prior art:
AS shown in fig. 3, a schematic diagram of an existing compressed air energy storage system includes at least two stages (for example, two stages) of air compressor units C1 and C2 connected in series, and a heat exchanger, such AS a heat exchanger H1 behind the compressor C1, is disposed at an outlet of each stage of the compressor, and is used for exchanging heat with high-temperature compressed exhaust air by using a heat-carrying medium, the compressed air enters a lower-stage compressor or a gas storage AS after releasing heat and reducing temperature, and the heat-carrying medium after absorbing heat and raising temperature enters a heat storage system HS for storage, so that electric energy input from the outside of the system is converted into pressure potential energy contained in the compressed air and compression heat energy contained in the heat-carrying medium are respectively stored. The system also comprises expansion units T1 and T2 which are connected in series (two stages are taken as an example), and heat exchangers H2 and H3 are arranged in front of inlets of the expansion machines and are used for heating air intake by adopting heat-carrying media, compressed air after heat absorption and temperature rising enters the expansion machines to apply work, reduce pressure and lower temperature and then enter heat exchangers before lower expansion machines to absorb heat again and raise temperature or discharge the heat into the environment, and the heat-carrying media after heat release and temperature reduction are returned to a heat storage system HS for storage, so that the regeneration of electric energy is realized by utilizing the compressed air and high-temperature heat-carrying media stored by the system.
In practical applications, compressed air energy storage systems typically employ a fixed-volume pressure vessel for storage of compressed air. In the process of charging, the exhaust pressure of the compressor unit continuously rises along with the increase of the air quantity in the air storage device, so that the stability of the exhaust temperature of the compressor is ensured, the stability of the working temperature of the heat storage system is realized, and the compressor is generally divided into two compression sections, as shown in fig. 3: the exhaust pressure of the compressor C1 is stable, a constant-pressure compression section is formed, and the exhaust with stable temperature can exchange heat with the heat-carrying medium in the heat exchanger H1, so that the high-temperature heat-carrying medium with stable temperature is provided for the heat storage system HS; the exhaust pressure of the compressor C2 continuously rises along with the inflation process of the air storage chamber AS, so that the exhaust temperature continuously rises, and compression heat energy supply of temperature cannot be provided, and the air storage chamber AS is generally cooled directly by adopting a cooler driven by a cooling water tower, so that heat energy is dissipated into the external environment to be heat energy loss, AS shown by a cooler CT in fig. 3.
From the foregoing, it is clear that in the prior art, the compression heat energy generated by the non-constant pressure section is lost in the form of dissipation, and cannot be effectively recycled and utilized. In addition, in the process of deflation power generation, along with the deflation of the fixed-volume gas storage AS, the gas quantity is continuously reduced, the gas pressure is reduced, when the gas pressure is reduced to a certain value, the minimum inlet pressure requirement of the expander T1 cannot be met, the system is forced to stop running, and the residual compressed air in the gas storage AS cannot be effectively utilized; meanwhile, according to the expansion cooling effect, the air temperature in the air storage chamber is reduced along with the air pressure, and according to a gas state equation, the air temperature is reduced to enable the compressed air density to be improved, so that the air pressure in the air storage chamber is further accelerated to be reduced, and when the air pressure is reduced to the lowest air inlet pressure of the expander, more compressed air is reserved in the air storage chamber AS and cannot be effectively utilized, and the volume utilization rate of the air storage chamber is low.
In view of the above, the present utility model provides a heat storage and gas storage device and a compressed air energy storage system to solve the above-mentioned problems.
The heat storage and gas storage device and the compressed air energy storage system provided by the utility model are described below with reference to fig. 1 and 2.
As shown in fig. 1, the present utility model provides, in one aspect, a thermal storage and storage device 6 including: the heat storage and gas storage device comprises a heat storage and gas storage device body, wherein a gas storage chamber 1 and a heat storage chamber 2 are arranged in the heat storage and gas storage device body, the heat storage chamber 2 is suitable for storing a heat storage medium exchanging heat with compressed air, and the heat storage chamber 2 is in one-way communication with the gas storage chamber 1; the heat accumulation cavity 2 is provided with a first gas outlet 201, the gas storage chamber 1 is provided with a second gas outlet 202, and the second gas outlet 202 is communicated with the bottom of the heat accumulation cavity 2 through a pipeline.
Specifically, in this embodiment, the heat storage and gas storage device 6 is suitable for a compressed air energy storage system, and performs auxiliary heat storage and gas storage in the compressed air energy storage system.
The air storage chamber 1 and the heat storage chamber 2 are both located inside the heat storage and air storage device body, and because the heat storage medium is usually liquid (water or heat storage oil), in this embodiment, the heat storage chamber 2 is disposed below the air storage chamber 1, so that compressed air can naturally flow upwards and exchange heat with the heat storage medium therein after entering the heat storage chamber 2, and then enters the air storage chamber 1 for storage after exchanging heat.
In this embodiment, the unidirectional communication between the heat storage chamber 2 and the air storage chamber 1 means that the air in the heat storage and air storage device body can only enter the air storage chamber 1 through the heat storage chamber 2, but cannot enter the heat storage chamber 2 from the air storage chamber 1.
As an example, a one-way partition mechanism 3, such as a one-way valve or the like, may be provided between the gas storage chamber 1 and the heat storage chamber 2, the inner chamber of the heat storage gas storage device body is partitioned into two independent chambers of the gas storage chamber 1 and the heat storage chamber 2, and gas can only enter the gas storage chamber 1 from the heat storage chamber 2 through the one-way partition mechanism 3.
As shown in fig. 1, in the embodiment of the present utility model, a liquid phase space 203 and a gas phase space 204 are provided in the heat storage chamber 2, the liquid phase space 203 is suitable for storing a heat storage medium exchanging heat with compressed air, the gas phase space 204 is located above the liquid phase space 203, and the first gas outlet 201 is provided in the gas phase space 204. By setting the heat storage cavity 2 as the liquid phase space 203 and the gas phase space 204, the compressed air can enter the gas phase space 204 to be collected after exchanging heat with the heat storage medium in the liquid phase space 203, so as to conveniently enter the air storage chamber 1 or the expander in the compressed air energy storage system.
As shown in fig. 1, in the embodiment of the present utility model, a heat exchange structure is disposed in the liquid phase space 203. Specifically, the heat exchange structure is the heat exchange fin 4, and the heat exchange fin 4 is immersed in the liquid heat storage medium, and when compressed air enters the liquid phase space 203, the heat exchange can be fully performed between the surface of the heat exchange fin 4 and the heat storage medium, so that the heat exchange efficiency is improved.
In a further embodiment of the present utility model, as shown in fig. 1, the upper and lower sides of the heat exchange fin 4 are respectively provided with a partition 5, and the partition 5 is provided with a gas via hole (not shown in fig. 1) adapted for the passage of gas. On the one hand, the baffle plate 5 positioned on the lower side of the heat exchange fin 4 can play a certain supporting and fixing role on the heat exchange fin 4, and on the other hand, the gas through holes arranged on the baffle plate can uniformly guide compressed air into the liquid phase space 203, so that the heat exchange efficiency is further improved. The baffle plate 5 positioned on the upper side of the heat exchange fin 4 can uniformly distribute the gas overflowing from the liquid phase space 203 into the gas phase space 204, so that the stability of the device in operation is improved.
As shown in fig. 1, in a further embodiment of the present utility model, an air distribution area 2031 is provided below the heat exchange fins 4, and the air distribution area 2031 is in communication with the second gas outlet 202 through a pipe. By arranging the air distribution area 2031, a certain buffer effect can be achieved on the compressed air entering the heat storage cavity 2, and the compressed air can be uniformly distributed, so that the compressed air uniformly enters the liquid phase space 203 to exchange heat with the heat storage medium, and the heat exchange efficiency is further improved.
As shown in fig. 2, another aspect of the present utility model provides a compressed air energy storage system, which includes an air compression module, a heat storage module 14, an expansion work module, and a heat storage and storage device 6 according to any of the foregoing embodiments, where the first gas outlet 201 is connected to the expansion work module.
Specifically, the air compression module includes a plurality of stages of air compressors (two stages are taken as an example in this embodiment), a first air compressor 7 and a second air compressor 8, respectively, with a first heat exchanger 9 provided between the first air compressor 7 and the second air compressor 8. The expansion work doing module comprises a multi-stage expander (two stages are taken as an example in the embodiment), namely a first expander 10 and a second expander 11, wherein a second heat exchanger 12 is arranged between the first expander 10 and the heat storage module 14, and a third heat exchanger 13 is arranged between the second expander 11 and the heat storage module 14. Wherein the first gas outlet 201 is connected to the second expander 11 through the gas inlet of the third heat exchanger 13.
In an embodiment of the compressed air energy storage system provided by the present utility model, the compressed air energy storage system further includes a power generation module (not shown in fig. 2), and the power generation module is connected to the expansion work module. The work done by the expansion of the air can be used for power generation.
The working principle of the heat storage and gas storage device and the compressed air energy storage system provided by the utility model is as follows:
As shown in fig. 2, when the system charges and stores energy, the air compression module is driven by renewable energy waste electricity, thermal power generation residual electricity or grid valley electricity to continuously compress air, and the exhaust gas of the constant-pressure compression section compressor (the first air compressor 7, the same shall apply hereinafter) firstly exchanges heat with the heat-carrying medium through the first heat exchanger 9 and then enters the non-constant-pressure section compressor (the second air compressor 8, the same shall apply hereinafter) for continuous compression. Air compressed by the non-constant pressure section compressor enters the heat storage cavity 2 through an air inlet at the bottom of the heat storage cavity 2, and meanwhile, heat-carrying medium absorbs heat in the first heat exchanger 9 and heats up and then enters the heat storage system for storage and standby. Compressed air enters the area where the heat exchange fins 4 are located through the air distribution area 2031, and fully exchanges heat with the heat storage medium on the structural surface of the heat exchange fins 4 while moving upwards, so that heat is stored in the heat storage medium, and the air after heat exchange enters the gas phase space 204 and enters the air storage chamber 1 for storage through the unidirectional mechanism.
When the system discharges electricity, compressed air flows out from the second gas outlet 202 of the air storage chamber 1 and enters the lower part of the heat storage cavity 2, enters the region where the heat exchange fins 4 are located through the air distribution region 2031, and fully exchanges heat with the structural surface of the heat exchange fins 4 and the heat storage medium while moving upwards to raise the temperature of the compressed air, and then part of the compressed air after heat absorption and temperature raising enters the third heat exchanger 13 to continue heating and then expand to do work, and the other part of the compressed air enters the air storage chamber 1 through the unidirectional structure to heat the air in the air storage chamber, so that the temperature in the air storage chamber 1 is raised.
As can be seen from the description of the above embodiments, the heat storage and gas storage device and the compressed air energy storage system provided by the present utility model can store the non-constant temperature compression heat energy in the exhaust gas of the non-constant pressure compression section into the system by reasonably setting the structure of the heat storage and gas charging and discharging process, so as to avoid heat energy loss; in addition, by utilizing the stored compression heat energy, the air inlet of the expander can be preheated in the air release process, so that the regenerative utilization of the stored heat energy is realized; meanwhile, part of stored compressed heat energy can enter the air storage chamber 1 along with preheated compressed air, so that the temperature drop of the air storage chamber 1 in the air release process is counteracted, and even the temperature of the air storage chamber 1 is increased, and therefore the air storage chamber 1 can discharge compressed air as much as possible in the same operating pressure range, and the volume utilization rate of the air storage chamber 1 is increased.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. A thermal storage gas storage device, comprising: the heat storage and gas storage device comprises a heat storage and gas storage device body, wherein a gas storage chamber and a heat storage cavity are arranged in the heat storage and gas storage device body, the heat storage cavity is suitable for storing a heat storage medium exchanging heat with compressed air, and the heat storage cavity is communicated with the gas storage chamber in one direction;
The heat accumulation cavity is provided with a first gas outlet, the gas storage chamber is provided with a second gas outlet, and the second gas outlet is communicated with the bottom of the heat accumulation cavity.
2. The heat and gas storage device according to claim 1, wherein a one-way separation mechanism is arranged in the heat and gas storage device body and separates an inner cavity of the heat and gas storage device body into the gas storage chamber and the heat storage cavity.
3. The thermal storage and gas storage device according to claim 1, wherein a liquid phase space and a gas phase space are arranged in the thermal storage cavity, the liquid phase space is suitable for storing a thermal storage medium exchanging heat with compressed air, the gas phase space is located above the liquid phase space, and the first gas outlet is arranged in the gas phase space.
4. A thermal storage and gas storage device as claimed in claim 3 wherein a heat exchange structure is provided in the liquid phase space.
5. The heat storage and gas storage device as claimed in claim 4, wherein the upper and lower sides of the heat exchange structure are respectively provided with a partition plate, and the partition plate is provided with a gas through hole suitable for passing gas.
6. The thermal storage and storage device as defined in claim 4 wherein an air distribution area is provided below the heat exchange structure.
7. The thermal storage and storage device as defined in claim 4 wherein the heat exchange structure is a heat exchange fin.
8. The thermal storage and storage device as claimed in any one of claims 1 to 7 wherein the thermal storage medium is water or thermal storage oil.
9. A compressed air energy storage system, comprising an air compression module, a heat storage module, an expansion work module and a heat storage and storage device according to any one of claims 1 to 8, wherein the first gas outlet is connected with the expansion work module.
10. The compressed air energy storage system of claim 9, further comprising a power generation module coupled to the expansion work module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322657885.XU CN220815937U (en) | 2023-09-28 | 2023-09-28 | Heat accumulation gas storage device and compressed air energy storage system |
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| CN202322657885.XU CN220815937U (en) | 2023-09-28 | 2023-09-28 | Heat accumulation gas storage device and compressed air energy storage system |
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