CN111197830A - A kind of water energy storage system and its control method - Google Patents
A kind of water energy storage system and its control method Download PDFInfo
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- CN111197830A CN111197830A CN202010108820.8A CN202010108820A CN111197830A CN 111197830 A CN111197830 A CN 111197830A CN 202010108820 A CN202010108820 A CN 202010108820A CN 111197830 A CN111197830 A CN 111197830A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 340
- 238000004146 energy storage Methods 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000003860 storage Methods 0.000 claims abstract description 83
- 239000012782 phase change material Substances 0.000 claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 238000005338 heat storage Methods 0.000 description 9
- 238000001816 cooling Methods 0.000 description 8
- 238000009825 accumulation Methods 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
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- 239000011232 storage material Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
- F24F5/0021—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice using phase change material [PCM] for storage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
- F24F2005/0032—Systems storing energy during the night
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses a water energy storage system and a control method thereof, wherein the water energy storage system comprises a water storage container, an energy production host and a heat exchanger; an upper water distributor and a lower water distributor are arranged in the water storage container; an energy storage and release body is arranged in the water storage container, the energy storage and release body is positioned between the lower water distributor and the upper water distributor, and the energy storage and release body is immersed in water; the energy storage and release body comprises a heat conduction shell with a containing cavity and a phase change material filled in the containing cavity. The water energy storage system and the control method thereof disclosed by the invention realize the combined energy storage and release of water and the phase-change material, the energy storage and release body is soaked in the water and is fully contacted with the water, the energy stored by the phase-change material is fully utilized, the energy storage and release performance is improved, and the volume of the water storage container can be reduced.
Description
Technical Field
The invention relates to the technical field of air conditioner energy storage equipment, in particular to a water energy storage system and a control method thereof.
Background
In the prior art, an air conditioner generally stores energy in an energy storage (cold or heat storage) mode at a power utilization valley, and releases the stored energy through water at a power utilization peak so as to supply cold or heat to a user.
However, in the prior art, energy storage is generally performed only by water or ice, the energy storage (cold storage or heat storage) is limited, and the energy storage performance of the energy storage needs to be improved.
Disclosure of Invention
The invention aims to provide a water energy storage system capable of improving energy storage performance and a control method thereof.
The technical scheme of the invention provides a water energy storage system, which comprises a water storage container, an energy production host machine and a heat exchanger;
the water storage container comprises a bottom plate, a container wall connected to the bottom plate and a top cover connected to the top of the container wall;
an upper water distributor and a lower water distributor positioned below the upper water distributor are arranged in the water storage container;
a circulating water pipeline is arranged on the outer side of the water storage container, the upper water distributor and the lower water distributor are respectively connected with the circulating water pipeline, and the energy production host and the heat exchanger are respectively arranged on the circulating water pipeline;
an energy storage and release body is arranged in the water storage container, the energy storage and release body is positioned between the lower water distributor and the upper water distributor, and the energy storage and release body is immersed in water;
the energy storage and release body comprises a heat conduction shell with a containing cavity and a phase change material filled in the containing cavity.
Furthermore, a net-shaped bracket is arranged in the water storage container and is positioned above the lower water distributor;
the energy storage and release body is positioned on the bracket.
Further, a bracket for supporting the bracket is arranged on the bottom plate;
the lower end of the support is connected to the bottom plate, and the upper end of the support penetrates through the lower water distributor and is connected with the bracket.
Further, the support is a telescopic support which can be extended and contracted along the up-down direction.
Further, a plurality of support plates are arranged on the container wall at intervals along the vertical direction, and the support plates are positioned above the lower water distributor;
the end of the bracket is selectively supported on one of the support plates.
Further, the bracket is suspended in the water storage container through a first stay cable;
the lower end of the first guy cable is connected with the bracket, and the upper end of the first guy cable passes through the upper water distributor and is connected with the top cover or the fastener on the container wall.
Further, a first fixed pulley is arranged below the top cover, and the first inhaul cable bypasses the first fixed pulley.
Further, the energy storage and release body is suspended in the water storage container through a second inhaul cable;
the lower end of the second inhaul cable is connected with the heat conduction shell, and the upper end of the second inhaul cable is connected with the connecting piece on the top cover or the container wall.
Further, a second fixed pulley is arranged below the top cover, and the second inhaul cable bypasses the second fixed pulley.
Furthermore, the water energy storage system also comprises a temperature measuring device for measuring the water temperature and/or the temperature of the energy storage and release body;
the temperature measuring device is arranged on the circulating water pipeline and/or in the water storage container.
Furthermore, a valve capable of automatically controlling the opening angle according to a temperature signal is arranged on the circulating water pipeline, and the valve is in signal connection with the temperature measuring device.
Furthermore, a plurality of energy storage and release bodies are arranged between the lower water distributor and the upper water distributor.
Further, the heat-conducting shell is provided with water flowing through holes, and the water flowing through holes in the two heat-conducting shells which are adjacent up and down are aligned.
Further, any two adjacent heat-conducting shells are spliced together.
The technical scheme of the invention also provides a control method of the water energy storage system, which comprises the following modes:
during energy storage, the opening degree of a valve on the circulating water pipeline is adjusted according to the temperature of the energy storage and release body or/and the water temperature in the water storage container, and the energy storage progress is controlled;
during energy release, the opening of a valve on the circulating water pipeline is adjusted according to the water outlet temperature of the water storage container, and the energy release speed is controlled.
By adopting the technical scheme, the method has the following beneficial effects:
the water energy storage system and the control method thereof provided by the invention realize the combined energy storage and release of water and the phase-change material, the energy storage and release body is soaked in the water and is fully contacted with the water, the energy stored by the phase-change material is fully utilized, the energy storage and release performance is improved, and the volume of the water storage container can be reduced.
Drawings
FIG. 1 is a schematic diagram of a water energy storage system provided by the present invention;
FIG. 2 is a schematic view of the bracket mounted within the reservoir by a bracket;
FIG. 3 is a schematic view of the bracket suspended within the reservoir by a first cable;
FIG. 4 is a schematic view of the energy storing and releasing body suspended in the water storage container by a second pull rope;
FIG. 5 is a top view of the carriage;
FIG. 6 is a cross-sectional view of an energy storing and releasing body of one construction;
FIG. 7 is a cross-sectional view of an energy storing and releasing body of another structure;
FIG. 8 is a schematic view of a thermally conductive housing having flow holes therethrough;
FIG. 9 is a schematic view of the alignment of flow holes in two thermally conductive housings adjacent one another above and below;
FIG. 10 is a schematic view of a plurality of thermally conductive shells of one construction being spliced together;
fig. 11 is a schematic view of multiple thermally conductive housings of another configuration being spliced together.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
A Phase Change Material (PCM-Phase Change Material) refers to a substance that changes the state of a substance at a constant temperature and can provide latent heat. The process of changing physical properties is called a phase change process, and in this case, the phase change material absorbs or releases a large amount of latent heat.
The phase change material mainly comprises three types of inorganic phase change materials, organic phase change materials and composite phase change materials. Wherein, the inorganic phase-change material mainly comprises crystalline hydrated salt, molten salt, metal or alloy and the like; the organic phase-change material mainly comprises paraffin, acetic acid and other organic matters; the composite phase-change material is formed by compounding a plurality of different phase-change materials, can effectively overcome the defects of a single inorganic or organic phase-change heat storage material, and can improve the application effect and expand the application range of the phase-change material.
The phase change material can be directly processed and molded into a required shape according to needs, and can also be mixed into a building material to be molded into a required shape.
As shown in fig. 1 to 7, a water energy storage system according to an embodiment of the present invention includes a water storage container 1, an energy generation main machine 2, and a heat exchanger 3.
The reservoir 1 includes a floor 11, a reservoir wall 12 attached to the floor 11, and a top cover 13 attached to the top of the reservoir wall 12.
An upper water distributor 14 and a lower water distributor 15 positioned below the upper water distributor 14 are arranged in the water storage container 1.
A circulating water pipeline 4 is arranged on the outer side of the water storage container 1, an upper water distributor 14 and a lower water distributor 15 are respectively connected with the circulating water pipeline 4, and the energy-producing host machine 2 and the heat exchanger 3 are respectively arranged on the circulating water pipeline 4.
An energy storage and release body 5 is arranged in the water storage container 1, the energy storage and release body 5 is positioned between the lower water distributor 15 and the upper water distributor 14, and the energy storage and release body 5 is immersed in water.
The energy storage and release body 5 comprises a heat conducting shell 51 with a containing cavity and a phase change material 52 filled in the containing cavity.
The water energy storage system provided by the invention mainly comprises a water storage container 1, an energy production host machine 2, a heat exchanger 3, a circulating water pipeline 4 and an energy storage and release body 5.
The reservoir 1 comprises a floor 11, a wall 12 and a roof 13. The upper water distributor 14 is arranged in the water storage container 1 and is positioned below the top cover 13. The lower water distributor 15 is arranged in the water storage container 1 above the lower water distributor 15.
The energy generation main machine 2 is a cold and hot preparation machine capable of cooling and heating. The heat exchanger 3 is used to supply energy (cooling or heating) to a user.
The circulating water pipe 4 is disposed outside the water storage container 1 for circulating running water to realize energy storage and supply. And a valve and a water pump are arranged on the circulating water pipeline 4.
The water inlet and outlet of the upper water distributor 14 and the lower water distributor 15 are respectively connected with the circulating water pipeline 4.
The energy-producing main machine 2 and the heat exchanger 3 are respectively arranged on the circulating water pipeline 4. The energy-producing main machine 2 and the heat exchanger 3 can be connected in series on the circulating water pipeline 4, and the energy-producing main machine 2 and the heat exchanger 3 can also be connected in parallel on the circulating water pipeline 4.
The energy storage and release body 5 is an object capable of storing energy (cold/heat storage) and releasing energy (cold/heat release), the phase change material 52 is packaged in the heat conduction shell 51, and the heat conduction shell 51 is filled with the phase change material 52 and is immersed in water. The heat conductive case 51 is a case capable of transferring heat, and may be a metal case, for example, a copper case, an iron case, an aluminum case, or the like.
The energy storage and release body 5 is arranged in the water storage container 1, can be supported in the water storage container 1 through a bracket, and can also be hung in the water storage container 1 through a hanging device. The energy storage and release body 5 is positioned between the lower water distributor 15 and the upper water distributor 14 and is immersed in water.
During cold accumulation, hot water in the water storage container 1 enters the energy-making host machine 2 through the upper water distributor 14 to be cooled, cold water cooled by the energy-making host machine 2 enters the water storage container 1 from the lower water distributor 15, then heat exchange is carried out between the cold water and the phase-change material 52 through the heat-conducting shell 51, and the phase-change material 52 and the water store cold energy together.
During cooling, cold water in the water storage container 1 carries cold energy of the phase change material 52 to enter the heat exchanger 3 through the lower water distributor 15, and exchanges heat with a heat exchanger at a user end to supply cold for the user. Hot water after heat exchange by the heat exchanger 3 flows back to the water storage container 1 through the upper water distributor 14.
During heat storage, cold water in the water storage container 1 enters the energy production main machine 2 through the lower water distributor 15 to be heated, hot water heated by the energy production main machine 2 enters the water storage container 1 from the upper water distributor 14, then heat exchange is carried out between the phase change material 52 and the heat conduction shell 51, and the phase change material 52 and the water store heat together.
During heat release, the hot water in the water storage container 1 carries heat of the phase change material 52 to enter the heat exchanger 3 through the upper water distributor 14, and exchanges heat with a heat exchanger at a user end to supply heat to the user. The cold water after heat exchange by the heat exchanger 3 flows back to the water storage container 1 through the lower water distributor 15.
Specifically, the brake master 2 is mounted on the first pipe 41, and the heat exchanger 3 is mounted on the second pipe 42. The first pipe 41 and the second pipe 42 are connected in parallel to the circulating water pipe 4. The valve 40 is installed on the circulating water pipe 4. The first water pump 46 is installed on the first pipe 41 and located at the front end of the energy generating main machine 2, and the second water pump 47 is installed on the circulating water pipe 4. A bypass pipe 45 is provided in the circulating water pipe 4 at the second water pump 47, and a valve 451 is provided in the bypass pipe 45. The third pipe 43 is connected between the bypass pipe 45 and the water inlet and outlet of the upper distributor 14, and the third pipe 43 is provided with a valve 431. The fourth pipe 44 is connected between the water inlet of the first pipe 41 and the water inlet and outlet of the lower water distributor 15, and a valve 441 is disposed on the fourth pipe 44.
During cold storage, the valves 431 and 441 are closed, the valve 451 is opened, the valve 40 is opened, the first water pump 46 is opened, and the second water pump 47 is closed. Hot water in the water storage container 1 enters the energy-making host machine 2 for cooling through the upper water distributor 14, the circulating water pipeline 4, the first water pump 46 and the first pipeline 41, cold water cooled by the energy-making host machine 2 enters the lower water distributor 15 through the first pipeline 41, the bypass pipe 45 and the circulating water pipeline 4, then enters the water storage container 1 from the lower water distributor 15, and then exchanges heat with the phase-change material 52 through the heat-conducting shell 51, and the phase-change material 52 and the water store cold together.
When the cold is released, the valve 431, the valve 441 and the valve 451 are closed, the valve 40 is opened, the second water pump 47 is opened, the first water pump 46 is closed, and the cold water in the water storage container 1 carrying the cold energy of the phase change material 52 enters the heat exchanger 3 through the lower water distributor 15 and the circulating water pipeline 4 to exchange heat with the heat exchanger at the user end so as to supply the cold to the user. Hot water after heat exchange by the heat exchanger 3 flows back to the water storage container 1 through the circulating water pipeline 4 and the upper water distributor 14.
During heat accumulation, the valve 40 is closed, the valve 431, the valve 441, and the valve 451 are opened, the first water pump 46 is opened, and the second water pump 47 is closed. The cold water in the water storage container 1 enters the energy-making host machine 2 through the lower water distributor 15, the fourth pipeline 44, the first water pump 46 and the first pipeline 41 to be heated. The hot water heated by the energy-making main machine 2 enters the upper water distributor 14 through the first pipeline 41, the bypass pipe 45 and the third pipeline 43, then enters the water storage container 1 from the upper water distributor 14, and then exchanges heat with the phase change material 52 through the heat-conducting shell 51, and the phase change material 52 and the water store heat together.
When heat is released, the valve 40 and the valve 451 are closed, the valve 431 and the valve 441 are opened, the first water pump 46 is closed, the second water pump 47 is opened, and the hot water in the water storage container 1 carries heat of the phase change material 52 to enter the heat exchanger 3 through the upper water distributor 14, the third pipeline 43 and the circulating water pipeline 4 to exchange heat with the heat exchanger at the user side so as to supply heat to the user. The cold water after heat exchange by the heat exchanger 3 flows back to the water storage container 1 through the circulating water pipeline 4, the fourth pipeline 44 and the lower water distributor 15.
In conclusion, the water energy storage system provided by the invention realizes the combined energy storage and release of water and the phase-change material, the energy storage and release body is soaked in the water and is fully contacted with the water, the energy stored by the phase-change material is fully utilized, the energy storage and release performance is improved, and the volume of the water storage container can be reduced.
Preferably, as shown in fig. 1-3 and 5, a net-shaped bracket 6 is arranged in the water storage container 1, the bracket 6 is positioned above the lower water distributor 15, and the energy storage and release body 5 is positioned on the bracket 6. The bracket 6 is provided with a plurality of meshes 61 which are communicated with the water outlet holes of the lower water distributor 15 to keep water flow smooth and avoid short circuit of water flow in the water storage container 1. The bracket 6 is used for bearing the energy storage and release body 5, so that the energy storage and release body 5 can be prevented from being pressed on the lower water distributor 15, the pressure of the lower water distributor 15 is reduced, the energy storage and release body 5 can be prevented from blocking a water outlet of the lower water distributor 15, and the phenomenon of short circuit of running water is avoided.
Preferably, as shown in fig. 2, a bracket 16 for supporting the bracket 6 is provided on the base plate 11. The lower end of the bracket 16 is connected to the bottom plate 11, and the upper end of the bracket 16 passes through the lower water distributor 15 and is connected to the bracket 6. The support 16 provides support for the bracket 6, and the lower end thereof is fixedly installed on the bottom plate 11, and the upper end thereof is fixedly connected with the bracket 6, so as to stably support the bracket 6 above the lower water distributor 15.
Preferably, the bracket 16 is a telescopic bracket capable of being extended and contracted in the up-down direction, and can be used to adjust the height of the bracket 6 in the water storage container 1. The support 16 may be a hydraulic cylinder, a crane, or the like.
Preferably, as shown in fig. 2, a plurality of support plates 17 are provided at intervals in the up-down direction on the vessel wall 12, and the support plates 17 are located above the lower water distributor 15. The end of the carriage 6 is optionally supported on one of the support plates 17. The support plate 17 may be an annular support plate disposed on the inner surface of the vessel wall 12. In the vertical direction, a plurality of supporting plates 17 are arranged at intervals, and the bracket 6 can be switched on different supporting plates 17 according to requirements so as to adjust the distance between the bracket 6 and the lower water distributor 15 and adjust the height of the energy storage and release body 5 in the water storage container 1. The bracket 6 can of course be adjusted by means of a telescopic support.
Preferably, as shown in fig. 3, the bracket 6 is suspended in the reservoir 1 by the first stay 18.
The lower end of the first cable 18 is connected with the bracket 6, and the upper end of the first cable 18 passes through the upper water distributor 14 and is connected with the fastening piece on the top cover 13 or the container wall 12.
In this embodiment, a fastening member is provided on the top cover 13 and/or the container wall 12, the lower end of the first pulling cable 18 is connected with the bracket 6, and the upper end thereof is fastened on the fastening member on the top cover 13 and/or the container wall 12, so that the bracket 6 is suspended in the water storage container 1, and the energy storage and release body 5 is arranged in the water storage container 1. The fastener may be a lifting lug or a hook, etc.
Preferably, as shown in fig. 3, a first fixed pulley 131 is arranged below the top cover 13, and the first pulling cable 18 is wound around the first fixed pulley 131, so that the height position of the bracket 6 in the water storage container 1, and therefore the height position of the energy storage and release body 5, can be conveniently adjusted by pulling the first pulling cable 18.
Preferably, be provided with a plurality of first fixed pulleys 131 in the below of top cap 13, be connected with a plurality of first cables 18 on bracket 6, every first cable 18 is walked around a first fixed pulley 131 respectively after, is connected with a fastener again, has improved the stability of hanging to bracket 6. When the height of the bracket 6 needs to be adjusted, all the first pull cables 18 are dragged and moved synchronously, so that the bracket 6 is ensured to move up and down smoothly in the water storage container 1, and the bracket 6 and/or the energy storage and release body 5 are prevented from touching the container wall 12.
Preferably, as shown in fig. 4, the energy accumulating and releasing body 5 is suspended in the water reservoir 1 by a second pulling rope 19. The lower end of the second cable 19 is connected with the heat-conducting shell 51, and the upper end of the second cable 19 is connected with a connecting piece on the top cover 13 or the container wall 12.
In this embodiment, a connecting member is provided on the top cover 13 and/or the container wall 12, the lower end of the second pulling cable 18 is directly connected with the heat conducting shell 51 of the energy storage and release body 5, and the upper end thereof is fastened on the connecting member on the top cover 13 and/or the container wall 12, so as to suspend the energy storage and release body 5 in the water storage container 1. The connecting piece can be a lifting lug or a hook and the like.
Preferably, as shown in fig. 4, a second fixed pulley 132 is arranged below the top cover 13, and the second cable 19 is wound around the second fixed pulley 132, so that the height position of the energy storage and release body 5 in the water storage container 1 can be conveniently stored by pulling the second cable 19.
Preferably, a plurality of second fixed pulleys 132 are arranged below the top cover 13, a plurality of second guys 19 are connected to each heat conducting shell 51, and each second guy 19 is connected to a connecting member after respectively bypassing one second fixed pulley 132, so that the suspension stability of the energy storage and release body 5 is improved. When the height of the energy storage and release body 5 needs to be adjusted, all the second inhaul cables 19 are dragged and moved synchronously, so that the energy storage and release body 5 is ensured to move up and down smoothly in the water storage container 1, and the energy storage and release body 5 is prevented from touching the container wall 12.
Preferably, as shown in fig. 1-4, the water energy storage system further comprises a temperature measuring device 7 for measuring the temperature of the water and/or the temperature of the energy storage and release body 5.
The temperature measuring device 7 is arranged on the circulating water pipeline 4 and/or in the water storage container 1.
The temperature measuring device 7 is used for measuring the water temperature and/or the temperature of the energy storage and release body 5. During energy storage, the opening degree of the opening valve is controlled according to the water temperature in the water storage container 1 and/or the temperature of the energy storage and release body 5 so as to control the energy storage speed, so that the temperature of the water entering the water storage container 1 meets the phase change temperature requirement of the phase change material 52.
Specifically, during cold accumulation, the opening degree of the opening valve 40 is controlled according to the water temperature in the water storage container 1 and/or the temperature of the energy storage and release body 5, so as to control the cold accumulation speed. During heat storage, the opening degrees of the valve 431, the valve 441 and the valve 451 are controlled according to the water temperature in the water storage container 1 and/or the temperature of the energy storage and release body 5, so as to control the heat storage speed.
During energy release, the opening degree of the opening valve is controlled according to the water temperature flowing out of the water storage container 1 so as to control the energy release speed, thereby adjusting the water outlet temperature of the water storage container 1 and keeping the water temperature in the circulating water pipeline 4 to meet the requirements and be stable.
Specifically, at the time of cooling release, the opening degree of the open valve 40 is controlled to control the cooling release speed. During heat release, the opening degree of the opening valve 431 and the opening degree of the opening valve 441 are controlled so as to control the heat release speed.
Preferably, as shown in fig. 1, a valve 40 capable of automatically controlling an opening angle according to a temperature signal is disposed on the circulating water pipe 4, and the valve 40 is in signal connection with the temperature measuring device 7.
A first pipeline 41 and a second pipeline 42 are connected in parallel to the circulating water pipeline 4, the energy generating main machine 2 is installed on the first pipeline 41, and the heat exchanger 3 is installed on the second pipeline 42. The first water pump 46 is installed on the first pipeline 41, the second water pump 47 is installed on the circulating water pipeline 4, and the second water pump 47 is located between the water inlet and outlet of the lower water distributor 15 and the water outlet 22 of the energy generating main machine 2. A bypass pipe 45 is provided at both ends of the second water pump 47 in the circulating water pipe 4, and a valve 451 is provided in the bypass pipe 45. The third pipe 43 is connected between the bypass pipe 45 and the water inlet and outlet of the upper distributor 14, and the third pipe 43 is provided with a valve 431. The fourth pipe 44 is connected between the water inlet of the first pipe 41 and the water inlet and outlet of the lower water distributor 15, and a valve 441 is disposed on the fourth pipe 44.
Wherein, valve 431, valve 441 and valve 451 are respectively connected with temperature measuring device 7 by signals, and valve 431, valve 441 and valve 451 can respectively control the opening angle automatically according to the temperature signal.
The valve 40, the valve 431, the valve 441 and the valve 451 are respectively automatic valves which can be electromagnetic valves, the valve 40, the valve 431, the valve 441 and the valve 451 are respectively connected with the temperature measuring device 7 through communication signals or electric signals, the opening angle is automatically controlled according to temperature signals, and automatic control is achieved.
Preferably, as shown in fig. 1-3, a plurality of energy storage and release bodies 5 are arranged between the lower water distributor 15 and the upper water distributor 14, so as to further improve the energy storage and release performance.
Preferably, a lower flow equalizing plate is disposed above the lower water distributor 15, and an upper flow equalizing plate is disposed below the upper water distributor 14. The energy storage and release body 5 is positioned between the lower flow equalizing plate and the upper flow equalizing plate.
The lower flow equalizing plate and the upper flow equalizing plate are both plate-shaped objects with a plurality of water flowing holes, water is guided to be uniformly distributed in the water storage container 1, and the water in the water storage container 1 is kept to synchronously ascend or descend during energy storage or energy release.
Preferably, the energy storage and release body 5 is spherical or cylindrical or conical, that is, the heat conductive shell 51 is spherical or cylindrical or conical.
By directly placing the spherical or cylindrical or conical energy storage and release bodies 5 in the water storage container 1, water can flow through the gaps between the adjacent energy storage and release bodies 5 and can fully exchange heat with the phase change material 52 of the internal heat conduction shell 51.
Preferably, as shown in fig. 8 to 9, the heat-conducting shell 51 has water flow through holes 511, and the water flow through holes 511 in two adjacent heat-conducting shells 51 are aligned up and down, which facilitates the water in the water storage container 1 to flow up and down, and facilitates the heat exchange with the phase change material 52 in the heat-conducting shell 51 from the middle.
Preferably, as shown in fig. 10-11, any adjacent two thermally conductive shells 51 are spliced together to form a desired shape for placement within the reservoir 1. The two heat-conducting shells 51 can be spliced by matching the clamping grooves and the clamping tenons or by matching the jacks and the pins.
The embodiment of the invention provides a control method of a water energy storage system, which comprises the following modes:
during energy storage, the opening degree of the valve 40 on the circulating water pipeline 4 is adjusted according to the temperature of the energy storage and release body 5 or/and the water temperature in the water storage container, and the energy storage progress is controlled, so that the temperature of the water entering the water storage container 1 meets the phase change temperature requirement of the phase change material 52.
During energy release, the opening degree of the valve 40 on the circulating water pipeline 4 is adjusted according to the temperature of the water outlet of the water storage container 1, the energy release speed is controlled, and the water temperature in the circulating water pipeline 4 is kept to meet the requirement and be stable.
Specifically, during cold accumulation, the opening degree of the opening valve 40 is controlled according to the water temperature in the water storage container 1 and/or the temperature of the energy storage and release body 5, so as to control the cold accumulation speed.
During heat storage, the opening degrees of the valve 431, the valve 441 and the valve 451 are controlled according to the water temperature in the water storage container 1 and/or the temperature of the energy storage and release body 5, so as to control the heat storage speed.
During cooling, the opening degree of the open valve 40 is controlled to control the cooling speed.
During heat release, the opening degree of the opening valve 431 and the opening degree of the opening valve 441 are controlled so as to control the heat release speed.
In conclusion, the water energy storage system and the control method thereof provided by the invention realize the combined energy storage and release of water and the phase-change material, the energy storage and release body is soaked in the water and is fully contacted with the water, the energy stored by the phase-change material is fully utilized, the energy storage and release performance is improved, and the volume of the water storage container can be reduced.
According to the needs, the above technical schemes can be combined to achieve the best technical effect.
The foregoing is considered as illustrative only of the principles and preferred embodiments of the invention. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.
Claims (15)
1. A water energy storage system is characterized by comprising a water storage container, an energy production host machine and a heat exchanger;
the water storage container comprises a bottom plate, a container wall connected to the bottom plate and a top cover connected to the top of the container wall;
an upper water distributor and a lower water distributor positioned below the upper water distributor are arranged in the water storage container;
a circulating water pipeline is arranged on the outer side of the water storage container, the upper water distributor and the lower water distributor are respectively connected with the circulating water pipeline, and the energy production host and the heat exchanger are respectively arranged on the circulating water pipeline;
the energy storage and release device is characterized in that an energy storage and release body is arranged in the water storage container, the energy storage and release body is positioned between the lower water distributor and the upper water distributor, and the energy storage and release body is immersed in water;
the energy storage and release body comprises a heat conduction shell with a containing cavity and a phase change material filled in the containing cavity.
2. The water energy storage system of claim 1 wherein a reticulated bracket is provided within the reservoir, the bracket being located above the lower distributor;
the energy storage and release body is positioned on the bracket.
3. The water energy storage system of claim 2 wherein a bracket is provided on said floor for supporting said carriage;
the lower end of the support is connected to the bottom plate, and the upper end of the support penetrates through the lower water distributor and is connected with the bracket.
4. A water energy storage system according to claim 3 wherein said support is a telescopic support which is telescopic in an up and down direction.
5. The water energy storage system according to claim 2, wherein a plurality of support plates are arranged on the container wall at intervals along the up-down direction, and the support plates are positioned above the lower water distributor;
the end of the bracket is selectively supported on one of the support plates.
6. The water energy storage system of claim 2 wherein said bracket is suspended within said reservoir by a first cable;
the lower end of the first guy cable is connected with the bracket, and the upper end of the first guy cable passes through the upper water distributor and is connected with the top cover or the fastener on the container wall.
7. The water energy storage system of claim 6 wherein a first fixed pulley is disposed below the top cover, the first cable passing around the first fixed pulley.
8. The water energy storage system of claim 1 wherein said energy storing and releasing body is suspended within said reservoir by a second cable;
the lower end of the second inhaul cable is connected with the heat conduction shell, and the upper end of the second inhaul cable is connected with the connecting piece on the top cover or the container wall.
9. The water energy storage system of claim 8 wherein a second fixed pulley is provided below the top cover, the second cable passing around the second fixed pulley.
10. The water energy storage system according to any one of claims 1-9, further comprising a temperature measuring device for measuring the temperature of the water and/or the energy storing and releasing body;
the temperature measuring device is arranged on the circulating water pipeline and/or in the water storage container.
11. The water energy storage system according to claim 10, wherein a valve capable of automatically controlling the opening angle according to a temperature signal is arranged on the circulating water pipeline, and the valve is in signal connection with the temperature measuring device.
12. The water energy storage system according to claim 1, wherein a plurality of energy storing and releasing bodies are arranged between the lower water distributor and the upper water distributor.
13. The water energy storage system of claim 12 wherein said thermally conductive housings have flow apertures, said flow apertures in two of said thermally conductive housings adjacent one above the other being aligned.
14. The water energy storage system of claim 12 wherein any adjacent two of said thermally conductive housings are spliced together.
15. A method of controlling a water energy storage system according to any one of claims 1-14, comprising the following modes:
during energy storage, the opening degree of a valve on the circulating water pipeline is adjusted according to the temperature of the energy storage and release body or/and the water temperature in the water storage container, and the energy storage progress is controlled;
during energy release, the opening of a valve on the circulating water pipeline is adjusted according to the water outlet temperature of the water storage container, and the energy release speed is controlled.
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Application publication date: 20200526 |