CN110550375A - Heat accumulating type compressed air energy storage device - Google Patents
Heat accumulating type compressed air energy storage device Download PDFInfo
- Publication number
- CN110550375A CN110550375A CN201910707824.5A CN201910707824A CN110550375A CN 110550375 A CN110550375 A CN 110550375A CN 201910707824 A CN201910707824 A CN 201910707824A CN 110550375 A CN110550375 A CN 110550375A
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- cavity
- heat
- energy storage
- flow divider
- compressed air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G5/00—Storing fluids in natural or artificial cavities or chambers in the earth
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0056—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using solid heat storage material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The invention relates to the technical field of energy storage, and provides a heat accumulating type compressed air energy storage device. The device comprises a strengthening block and a cavity formed in a mountain, wherein the strengthening block blocks a hole opening of the cavity, a first flow divider and a second flow divider are sequentially arranged in the cavity from the strengthening block to the hole bottom of the cavity, and the second flow divider divides the space between the first flow divider and the hole bottom of the cavity into a heat storage cavity and a gas storage cavity; the heat storage cavity is arranged close to the reinforced block body, and heat storage materials are filled in the heat storage cavity; the strengthening block transversely penetrates through a first channel communicated with the first flow divider, and a valve is arranged on the first channel. The invention not only realizes the integrated design of heat energy storage and potential energy storage, greatly reduces the complexity of the whole device, but also reduces the cost and the occupied area. In addition, the invention adopts the strengthening block to block the hole opening of the cavity, thereby not only ensuring the air tightness and the strength of the cavity, but also meeting the requirements of high-pressure gas storage safety and high efficiency.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to a heat accumulating type compressed air energy storage device.
Background
Compressed air energy storage is a novel energy storage and power storage technology. The storage of energy, in particular electrical energy, is of great importance for the optimization of the energy structure and the regulation of the operation of the power grid. In 1978, germany built the first exemplary compressed air energy storage power plant of the world, followed by the united states, japan and israel. The working principle of the compressed air energy storage power generation system is similar to that of pumped storage, when the power consumption of the power system is in a low ebb, the system stores energy, namely, surplus electric energy is used for driving an air compressor to compress air, and the electric energy is stored in a gas storage device in a compressed air mode; when the electric load of the power system reaches a peak and the generated energy is insufficient, the system releases energy, namely the air storage device releases the stored compressed air, the compressed air and the fuel are mixed and combusted in the combustion chamber, and the high-temperature gas generated by combustion expands in the turboexpander to do work and drives the generator to generate electricity, so that the conversion of electric energy-air potential energy-electric energy is completed.
The existing adiabatic compressed air energy storage system abandons a technical route of improving the working capacity of compressed air by consuming fuel, converts redundant electric energy into heat energy and air potential energy to be stored respectively in an energy storage stage, and heats the inlet air of a turboexpander by using the heat energy stored in the system per se in an energy release stage. Therefore, the adiabatic compressed air energy storage system stores the heat energy and the potential energy respectively and independently in the energy storage stage, and couples the heat energy and the potential energy in the energy release stage, so that the requirement of the turbo expander on the inlet temperature is met, and the carbon emission is avoided. Because a special pressure container is required to be arranged to store compressed air when the existing heat insulation compressed air energy storage system stores potential energy, and a special heat accumulator and a heat exchanger group are required to be arranged when heat energy is stored, the heat insulation compressed air energy storage system has a complex structure, high cost and large floor area.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
The invention aims to provide a heat accumulating type compressed air energy storage device, which aims to solve the technical problems of complex structure, high cost and large occupied area of the conventional heat insulating compressed air energy storage system.
In order to achieve the purpose, the invention provides a heat accumulating type compressed air energy storage device which comprises a reinforcing block and a cavity formed in a mountain, wherein the reinforcing block blocks a hole opening of the cavity, a first flow divider and a second flow divider are sequentially arranged in the cavity from the reinforcing block to the hole bottom of the cavity, and the second flow divider divides the space between the first flow divider and the hole bottom of the cavity into a heat storage cavity and an air storage cavity; the heat storage cavity is arranged close to the reinforced block body, and heat storage materials are filled in the heat storage cavity; the reinforcing block transversely penetrates through a first channel communicated with the first flow divider, and a valve is arranged on the first channel.
Wherein, the inner wall of first passageway the lateral wall in heat accumulation chamber and first shunt with the second shunt dorsad the heat preservation heat insulation layer has all been laid to one side in heat accumulation chamber, lay heat preservation heat insulation layer on the second shunt is seted up and is used for the intercommunication the second shunt with the second passageway in gas storage chamber.
The first flow divider abuts against the reinforced block body, one side, back to the heat storage cavity, of the second flow divider is provided with a support wall, and a vent hole used for communicating the second flow divider with the air storage cavity is formed in the support wall.
Wherein the first channel is provided at a lower portion of the reinforcing block.
Wherein, the cavity is a natural cavity or an artificial cavity.
Wherein the heat storage material is in a granular shape.
Wherein, the reinforced block is formed by pouring cement.
The reinforcing block is of a conical structure, and the large end of the reinforcing block is arranged towards the first flow divider; the opening of the cavity hole is a conical hole matched with the reinforced block.
The outer wall of the strengthening block body is uniformly provided with sawtooth-shaped bulges, and the inner wall of the cavity hole is provided with sawtooth-shaped grooves matched with the sawtooth-shaped bulges.
The invention fully utilizes the cavity hole formed in the mountain body, integrates the heat storage cavity and the gas storage cavity in the cavity hole, realizes the integrated design of heat energy storage and potential energy storage, greatly reduces the complexity of the whole device, and also reduces the cost and the occupied area. In addition, the invention adopts the strengthening block to block the hole opening of the cavity, thereby not only ensuring the air tightness and the strength of the cavity, but also meeting the requirements of high-pressure gas storage safety and high efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a heat accumulating type compressed air energy storage device in an embodiment of the invention.
Reference numerals:
1. Reinforcing the block; 1.1, a first channel; 1.2, saw-toothed protrusions; 2. a first splitter; 3. a second flow splitter; 4. a heat storage chamber; 5. a gas storage cavity; 6. a heat storage material; 7. a heat insulation layer; 7.1, a second channel; 8. a support wall; 8.1, air vents.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless otherwise specified, the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the designated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
It is to be understood that, unless otherwise expressly stated or limited, the term "coupled" is used in a generic sense as defined herein, e.g., fixedly attached or removably attached or integrally attached; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the present embodiment provides a heat accumulating type compressed air energy storage device, the device includes a reinforcing block 1 and a cavity formed in a mountain, the reinforcing block 1 blocks a hole opening of the cavity, a first current divider 2 and a second current divider 3 are sequentially arranged in the cavity from the reinforcing block 1 to a hole bottom of the cavity, the second current divider 3 divides a space between the first current divider 2 and the hole bottom of the cavity into a heat storage cavity 4 and an air storage cavity 5; the heat storage cavity 4 is arranged close to the reinforced block body 1, and the heat storage cavity 4 is filled with a heat storage material 6; the strengthening block body 1 transversely penetrates through a first channel 1.1 communicated with the first flow divider 2, and a valve is arranged on the first channel 1.1. The cavity hole can be a natural cavity hole or an artificial cavity hole, namely a cavity hole artificially dug on a mountain body.
During energy storage: an external high-temperature gas source is communicated with the first channel 1.1, and a valve is opened. At this time, the high-temperature and high-pressure gas discharged from the external high-temperature gas source flows to the first flow divider 2 through the first passage 1.1. High-temperature high-pressure gas evenly flows into the heat storage cavity 4 after being distributed by the first flow divider 2, the high-temperature high-pressure gas flowing through the heat storage cavity 4 continuously exchanges heat with the heat storage material 6 in the heat storage cavity 4, and the high-temperature high-pressure gas transfers the heat of the high-temperature high-pressure gas to the heat storage material 6 and then is converted into high-pressure low-temperature gas. The high-pressure low-temperature gas flows into the gas storage cavity 5 through the second flow divider 3 to be stored. As the high-temperature and high-pressure gas discharged from the external high-temperature gas source continuously flows into the heat storage chamber 4, the amount of heat stored in the heat storage material 6 increases. It can be seen that throughout the energy storage phase, heat energy is continuously stored in the heat storage chamber 4 and potential energy is continuously stored in the gas storage chamber 5. And when the energy storage is finished, closing the valve and disconnecting the external high-temperature gas source and the first channel 1.1. It should be noted that the pressure in the heat storage chamber 4 after the valve is closed and the gas supply is stopped is the same as the pressure in the gas storage chamber 5, and the flow resistance in the heat storage chamber 4 is large due to the heat storage material 6, so that the high-pressure low-temperature gas stored in the gas storage chamber 5 does not flow back to the heat storage chamber 4.
When energy is released: an external gas load is connected to the first channel 1.1 and the valve is opened. At this time, the heat storage cavity 4 is communicated with external air load, the pressure in the air storage cavity 5 is greater than the pressure in the heat storage cavity 4, high-pressure low-temperature gas stored in the air storage cavity 5 uniformly flows into the heat storage cavity 4 after being distributed by the second flow divider 3, the high-pressure low-temperature gas flowing through the heat storage cavity 4 continuously exchanges heat with the heat storage material 6 in the heat storage cavity 4, and the high-pressure low-temperature gas is converted into high-temperature high-pressure gas after absorbing heat from the heat storage material 6. The high-temperature and high-pressure gas flows into an external gas load through the first flow divider 2 and the first channel 1.1 in sequence, so that the coupling of heat energy and potential energy is completed.
It should be noted that the external high temperature gas source may be, but is not limited to, a compressor, and the external gas load may be, but is not limited to, a turboexpander.
Therefore, the device fully utilizes the cavity hole formed in the mountain body, and the heat storage cavity 4 and the gas storage cavity 5 are integrated in the cavity hole, so that the integrated design of heat energy storage and potential energy storage is realized, the complexity of the whole device is greatly reduced, and the cost and the occupied area are also reduced. In addition, the device adopts the strengthening block body 1 to plug the hole opening of the cavity, thereby not only ensuring the air tightness and the strength of the cavity, but also meeting the requirements of high-pressure gas storage safety and high efficiency.
Further, in order to reduce the heat leakage along the way when the high-temperature and high-pressure gas flows in the first channel 1.1, the inner wall of the first channel 1.1 is paved with a heat insulation layer 7. Meanwhile, in order to reduce the heat leakage amount of the heat storage cavity 4, a heat insulation layer 7 is laid on the side wall of the heat storage cavity 4 and one side of the first flow divider 2 and one side of the second flow divider 3, which are opposite to the heat storage cavity 4, and a second channel 7.1 for communicating the second flow divider 3 with the air storage cavity 5 is arranged on the heat insulation layer 7 laid on the second flow divider 3.
In addition, considering that the heat storage material in the heat storage cavity 4 can be subjected to double stress caused by pressure and temperature in the heat storage and energy release processes, in order to avoid collapse of the heat storage material 6 under the reciprocating loading of the double stress, the first flow divider 2 abuts against the reinforced block body 1, one side of the second flow divider 3, which faces away from the heat storage cavity 4, is provided with a support wall 8, and the support wall 8 is provided with a vent hole 8.1 for communicating the second flow divider 3 with the gas storage cavity 5. Thus, the first shunt 2 is restrained by the reinforcing block 1 and cannot move away from the second shunt 3, and the second shunt 3 is restrained by the support wall 8 and cannot move away from the first shunt 2, so that the thermal storage material 6 filled between the first shunt 2 and the second shunt 3 cannot collapse. In addition, in order to improve the heat exchange efficiency and ensure that gaps are naturally formed between the heat storage materials 6 in the heat storage chamber 4, the heat storage materials 6 are preferably in a granular shape. Therefore, when high-temperature high-pressure gas or high-pressure low-temperature gas passes through the heat storage cavity 4, the gaps among the heat storage materials 6 are filled, and the gas filled in the gaps can fully exchange heat with the heat storage materials 6.
Preferably, the first channel 1.1 is provided in the lower part of the reinforcing block 1. The advantage of setting up like this is because the hot gas flow goes upward, consequently through locating the lower part of strengthening block 1 with first passageway 1.1, will flow upward automatically when high temperature high pressure gas flows to first separator through first passageway 1.1 during the energy storage, and then just can make the intake of heat accumulation chamber 4 more even.
Preferably, the reinforcing block 1 is of a conical structure, and the large end of the reinforcing block 1 is disposed toward the first flow divider 2, that is, the small end of the reinforcing block 1 is disposed outward; the opening of the cavity is provided with a conical hole which is matched with the strengthening block body 1. It should be noted that, the outside is referred to the cavity bottom, the direction approaching the cavity bottom is inside, and the direction far away from the cavity bottom is outside. The advantages of such an arrangement are: on the one hand, when the pressure in the cavity rises, the pressure acting on the large end of the reinforced block body 1 is transmitted to the wall surface of the cavity through the conical surface of the reinforced block body 1, so that the reinforced block body 1 is prevented from being ejected out or cracked. On the other hand, because the opening of the cavity is a tapered hole adapted to the reinforcing block 1, and the large end of the reinforcing block 1 faces inward and the small end faces outward, that is, the longitudinal section of the reinforcing block 1 gradually decreases outward, the reinforcing block 1 is difficult to eject under the constraint of the side wall of the cavity opening. The reinforcing block 1 may be formed by curing a curing agent, for example, the reinforcing block 1 is formed by pouring cement. Of course, the reinforcing block 1 may be formed by stacking bricks.
In addition, in order to further improve the sealing performance between the reinforcing block body 1 and the side wall of the cavity hole, the outer wall of the reinforcing block body 1 is uniformly provided with saw-toothed protrusions 1.2, and the inner wall of the cavity hole is provided with saw-toothed grooves matched with the saw-toothed protrusions 1.2. From this, through the cooperation of serration 1.2 and zigzag groove, can prolong the length of contact surface between intensive block 1 and the chamber hole lateral wall and then increase along journey resistance, avoid the interior gas of chamber hole to reveal away from the clearance between intensive block 1 and the chamber hole lateral wall.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the invention, but not to limit it; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A heat accumulating type compressed air energy storage device is characterized by comprising a reinforcing block and a cavity formed in a mountain, wherein the reinforcing block blocks a hole opening of the cavity, a first flow divider and a second flow divider are sequentially arranged in the cavity from the reinforcing block to the hole bottom of the cavity, and the second flow divider divides the space between the first flow divider and the hole bottom of the cavity into a heat accumulation cavity and a gas storage cavity; the heat storage cavity is arranged close to the reinforced block body, and heat storage materials are filled in the heat storage cavity; the reinforcing block transversely penetrates through a first channel communicated with the first flow divider, and a valve is arranged on the first channel.
2. A heat accumulating compressed air energy storage device as claimed in claim 1, wherein the inner wall of the first passage, the side wall of the heat accumulating chamber and the side of the first and second shunts facing away from the heat accumulating chamber are all laid with a heat insulating layer, and the heat insulating layer laid on the second shunt is provided with a second passage for communicating the second shunt with the air accumulating chamber.
3. A heat accumulating compressed air energy storage device as claimed in claim 1, wherein the first flow divider abuts against the reinforcing block, a support wall is provided on a side of the second flow divider opposite to the heat storage chamber, and a vent hole for communicating the second flow divider with the air storage chamber is provided on the support wall.
4. A regenerative compressed air energy storage device as claimed in claim 1 wherein said first passage is provided in a lower portion of said reinforcing block.
5. A regenerative compressed air energy storage device as claimed in claim 1 wherein said cavity is a natural cavity or an artificial cavity.
6. A regenerative compressed air energy storage device as claimed in claim 1 wherein said regenerative material is in granular form.
7. A regenerative compressed air energy storage device as claimed in claim 1 wherein said reinforcing blocks are cast of cement.
8. A regenerative compressed air energy storage device as claimed in any of claims 1 to 7 wherein the reinforcing blocks are of a tapered configuration with the large ends of the reinforcing blocks being disposed towards the first flow diverter; the opening of the cavity hole is a conical hole matched with the reinforced block.
9. A heat accumulating compressed air energy storage device according to any one of claims 1 to 7, wherein the outer wall of the strengthening block body is uniformly provided with saw-tooth-shaped protrusions, and the inner wall of the cavity hole is provided with saw-tooth-shaped grooves matched with the saw-tooth-shaped protrusions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910707824.5A CN110550375B (en) | 2019-08-01 | 2019-08-01 | Heat accumulating type compressed air energy storage device |
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| CN201910707824.5A CN110550375B (en) | 2019-08-01 | 2019-08-01 | Heat accumulating type compressed air energy storage device |
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| CN110550375A true CN110550375A (en) | 2019-12-10 |
| CN110550375B CN110550375B (en) | 2020-10-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810260A (en) * | 2022-06-23 | 2022-07-29 | 西安热工研究院有限公司 | Gravity energy storage system with buffering effect |
| CN114810261A (en) * | 2022-06-23 | 2022-07-29 | 西安热工研究院有限公司 | Gravity type compressed air energy storage system and method |
| CN114909597A (en) * | 2022-06-23 | 2022-08-16 | 西安热工研究院有限公司 | Gravity compressed air storage device with auxiliary starting and speed reducing functions |
| CN115031153A (en) * | 2022-06-23 | 2022-09-09 | 西安热工研究院有限公司 | Heat accumulating type gravity compressed air energy storage system |
| CN117267092A (en) * | 2023-07-31 | 2023-12-22 | 安徽华赛能源科技有限公司 | Chamber type compressed air energy storage system and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810260A (en) * | 2022-06-23 | 2022-07-29 | 西安热工研究院有限公司 | Gravity energy storage system with buffering effect |
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| CN114909597A (en) * | 2022-06-23 | 2022-08-16 | 西安热工研究院有限公司 | Gravity compressed air storage device with auxiliary starting and speed reducing functions |
| CN115031153A (en) * | 2022-06-23 | 2022-09-09 | 西安热工研究院有限公司 | Heat accumulating type gravity compressed air energy storage system |
| CN114810261B (en) * | 2022-06-23 | 2022-10-11 | 西安热工研究院有限公司 | Gravity type compressed air energy storage system and method |
| CN114909597B (en) * | 2022-06-23 | 2024-02-13 | 西安热工研究院有限公司 | Gravity compressed air storage device with auxiliary starting and decelerating functions |
| CN115031153B (en) * | 2022-06-23 | 2024-05-07 | 西安热工研究院有限公司 | Heat accumulating type gravity compressed air energy storage system |
| CN117267092A (en) * | 2023-07-31 | 2023-12-22 | 安徽华赛能源科技有限公司 | Chamber type compressed air energy storage system and control method |
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| CN110550375B (en) | 2020-10-30 |
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