CN108613385A - A kind of fused salt aqueous solution energy-storage system - Google Patents
A kind of fused salt aqueous solution energy-storage system Download PDFInfo
- Publication number
- CN108613385A CN108613385A CN201611126196.4A CN201611126196A CN108613385A CN 108613385 A CN108613385 A CN 108613385A CN 201611126196 A CN201611126196 A CN 201611126196A CN 108613385 A CN108613385 A CN 108613385A
- Authority
- CN
- China
- Prior art keywords
- fused salt
- water
- storage tank
- liquid storage
- aqueous solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 150000003839 salts Chemical class 0.000 title claims abstract description 92
- 239000007864 aqueous solution Substances 0.000 title claims abstract description 37
- 238000004146 energy storage Methods 0.000 title claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 239000010865 sewage Substances 0.000 claims abstract description 11
- 238000009413 insulation Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000005338 heat storage Methods 0.000 claims description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 8
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 4
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 238000009833 condensation Methods 0.000 abstract description 6
- 239000002609 medium Substances 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000009835 boiling Methods 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 239000008236 heating water Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000012736 aqueous medium Substances 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 208000021760 high fever Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
- F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
- F24H7/0208—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using electrical energy supply
- F24H7/0233—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using electrical energy supply the transfer fluid being water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
-
- 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
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
Abstract
The present invention discloses a kind of fused salt aqueous solution energy-storage system, including the water-soluble liquid storage tank of fused salt, circulating pump, blender, sewage draining exit, electric heater, heat exchanger and heat user, the head cover of the water-soluble liquid storage tank of fused salt is equipped with blender and circulating pump, and bottom end is equipped with sewage draining exit；The water-soluble liquid storage tank of fused salt is connect with heat exchanger；The electric heater is built in the top of the water-soluble liquid storage tank of fused salt；The heat exchanger is connect with heat user, and the tank skin of the water-soluble liquid storage tank of fused salt is provided with external thermal insulation.The present invention, which can reach, reduces heat-storing device volume, saves floor occupying area, reduces anti-condensation device, reduces system initial cost；Fused salt aqueous solution fusing point is low, easy care, without anti-condensation danger, and takes the thermal efficiency high, takes heat-staple advantageous effect.
Description
Technical field
The invention belongs to energy storage material and systems technology field, more particularly to a kind of fused salt aqueous solution energy-storage system.
Background technology
The fields such as solar energy thermal-power-generating, wind-powered electricity generation, photovoltaic generation, heating are required to energy-storage system, there is aqueous medium energy storage at present
System, power generation molten salt energy storage system, solid brick energy-storage system etc..Water will boil for 100 DEG C under normal pressure, as sensible heat storage without phase-change
Can, water can only work at 100 DEG C or less under normal pressure, use water as the energy-storage system of heat-storage medium, and energy storage is small using the temperature difference, and
The density of water is smaller, and energy storage device volume is larger, limits application range.
Use fused salt as the energy-storage system of heat-storage medium, with higher temperature in use, high stability, high specific heat capacity,
The advantages that high convective heat-transfer coefficient, but its fusing point is higher, to avoid fused salt from being set in pipeline in the process of running, especially valve
Door, flange, elbow etc. can not have fused salt residual, otherwise easily cause the frozen block of whole system.
In solid brick energy-storage system, under the temperature of heat exchanging fluid can continue with the decline of heat-storage medium temperature when heat release
Drop takes heat more and more difficult, and heat accumulation efficiency is low, and the easy dusting of heat-storage medium, heat reservoir service life are shorter.
Fused salt aqueous solution storage in the present invention has higher boiling point relative to water, and heat transfer temperature difference is big, and it is with high fever
The advantages such as stability, high specific heat capacity；There is lower solidification point relative to power generation molten salt energy storage system, without considering that the anti-condensation of fused salt is asked
Topic.Therefore fused salt aqueous solution is used to be easier to displace the hot water of heating required temperature, system operation peace as heat transfer accumulation of heat working medium
Entirely, safeguard that simply system bulk is small, has saved initial cost and floor space.
Invention content
The present invention is directed to the above-mentioned technical problems in the prior art, provides a kind of fused salt aqueous solution energy-storage system, can
Reach and reduce heat-storing device volume, reduce anti-condensation device, reduces system initial cost；Fused salt aqueous solution fusing point is low, easy care, without anti-
Solidifying danger, and take the thermal efficiency high, take heat-staple advantageous effect.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of fused salt aqueous solution energy-storage system, including
The water-soluble liquid storage tank of fused salt, electric heater, blender, sewage draining exit, circulating pump, heat exchanger and heat user,
It is embedded on the head cover of the water-soluble liquid storage tank of fused salt to be equipped with electric heater, blender and circulating pump, the fused salt
Sewage draining exit is equipped with outside the bottom end of water-soluble liquid storage tank；The water-soluble liquid storage tank of fused salt is connect with heat exchanger；The heat exchanger and heat
User connects.
Preferably, the circulating pump is vertical submerged pump.
Preferably, the blender is propeller agitator, on the central shaft in the water-soluble liquid storage tank of fused salt.
Preferably, the tank skin of the water-soluble liquid storage tank of fused salt is both provided with external thermal insulation.
Preferably, the heat-storage medium is fused salt aqueous solution, it uses KNO3、NaNO3、Na2CO3、K2CO3Etc. inorganic
One or more and water in salt mixes.
Preferably, the water-soluble liquid storage tank of fused salt may be configured as one or two.
Compared with prior art, advantageous effect possessed by the present invention is：Fused salt aqueous solution in the present invention has heat conduction
Performance is good, and specific heat capacity is big, and density is big, and temperature is high, using the big advantage of warm area, reduces heat-storing device volume, economizes on ground
Product.Compared with existing fused salt working medium energy storage technology, the fused salt aqueous solution in the present invention has fusing point low, without anti-condensation danger, Yi Wei
The advantages of shield, reduces anti-condensation device, reduces system initial cost.Compared with existing solid brickwork matter energy storage technology, the present invention
In fused salt aqueous solution have and take the thermal efficiency high, take heat-staple advantage.Based on the plurality of advantages of the water-soluble hot energy-storage system of fused salt,
Contribute to the present invention in the large-scale promotion application in middle cryogenic heat transfer accumulation of heat field.
Description of the drawings
Fig. 1 is single can system structural schematic diagram in the present invention；
Fig. 2 is double can system structural schematic diagrams in the present invention.
The water-soluble liquid storage tank of 1- fused salts in figure, 2- electric heaters, 3- blenders, 4- sewage draining exits, 5- circulating pumps, 6- heat exchangers,
7- heat users, the water-soluble liquid storage tank of 8- high-temperature molten salts, the water-soluble liquid storage tank of 9- low-temperature molten salts.
Specific implementation mode
To make those skilled in the art be better understood from technical scheme of the present invention, in the following with reference to the drawings and specific embodiments
It elaborates to the present invention.
Embodiment 1：
Embodiment of the invention discloses that a kind of fused salt aqueous solution energy-storage system, as shown in Figure 1 comprising fused salt aqueous solution
Storage tank 1, electric heater 2, blender 3, sewage draining exit 4, circulating pump 5, heat exchanger 6 and heat user 7,
Embedded on the head cover of the water-soluble liquid storage tank of fused salt 1 to be equipped with electric heater 2, blender 3 and circulating pump 5, fused salt is water-soluble
Sewage draining exit 4 is equipped with outside the bottom end of liquid storage tank 1；The water-soluble liquid storage tank 1 of fused salt is connect with heat exchanger 6；Heat exchanger 6 connects with heat user 7
It connects.
In the present embodiment, circulating pump 5 is vertical submerged pump.
In the present embodiment, blender 3 is propeller agitator, on the central shaft in the water-soluble liquid storage tank of fused salt 1.
In the present embodiment, the tank skin of the water-soluble liquid storage tank of fused salt 1 is provided with external thermal insulation.
In the present embodiment, the heat-storage medium is fused salt aqueous solution, it uses KNO3、NaNO3、Na2CO3、K2CO3Etc. nothings
One or more and water in machine salt mixes, and boiling point is up to 170 DEG C or more.
In the present embodiment, energy-accumulating medium of the fused salt aqueous solution as heating system, in thermal energy storage process, first
Opening electric heater, electric heater convert electrical energy into thermal energy and pass to fused salt aqueous solution, and the temperature of fused salt aqueous solution is made to protect
It holds more than setting value, but is less than its boiling point.During heating, different spaces in storage tank are made by the stirring action of blender
The temperature of molten salt of position is uniformly distributed, and achievees the effect that eliminate temperature gradient in tank.In exothermic process, 170 DEG C or more molten
Saline solution exchanges heat under the action of circulating pump from the extraction of the lower part of the water-soluble liquid storage tank of fused salt with heating water return, the low temperature after heat exchange
Fused salt aqueous solution is returned to from the top of storage tank in storage tank, and forms a mesolimnion with the fused salt aqueous solution of storage tank lower part high temperature,
Heat exchanger is sequentially entered later and carries out the next cycle to exchange heat with heating water return, until the temperature of fused salt aqueous solution drops to 95-
105 DEG C or so, the energy of fused salt aqueous solution storage all discharges, and heat exchange terminates.
Embodiment 2：
Embodiment of the invention discloses that a kind of double tank fused salt aqueous solution energy-storage systems, as shown in Figure 2 comprising low temperature is molten
The water-soluble liquid storage tank 8 of saline solution storage tank 9, circulating pump 5, blender 3, sewage draining exit 4, electric heater 2, high-temperature molten salt, 6 and of heat exchanger
Heat user 7,
It is equipped with blender 3 and circulating pump on the head cover of the water-soluble liquid storage tank 8 of high-temperature molten salt and the water-soluble liquid storage tank of low-temperature molten salt 9
5, sewage draining exit 4 is equipped with outside the bottom end of the water-soluble liquid storage tank 8 of high-temperature molten salt and the water-soluble liquid storage tank of low-temperature molten salt 9；High temperature melting brine
Solution reservoir 8 and the water-soluble liquid storage tank of low-temperature molten salt 9 are connect with electric heater 2 and heat exchanger 6；Heat exchanger 6 connects with heat user 7
It connects.
In the present embodiment, circulating pump 5 is vertical submerged pump, and the mounting height of suction inlet is higher than the installation of electric heater 2
Highly.
In the present embodiment, blender 3 is propeller agitator, is in the water-soluble liquid storage tank 9 of low-temperature molten salt and high-temperature molten salt
On the central shaft of water-soluble liquid storage tank 8.
In the present embodiment, the tank skin of the water-soluble liquid storage tank 9 of low-temperature molten salt and the water-soluble liquid storage tank of high-temperature molten salt 8 is both provided with outer guarantor
Warm layer.
In the present embodiment, the water-soluble liquid storage tank of electric furnace, circulating pump, high-temperature molten salt passes sequentially through pipeline and connects and composes heat accumulation
Part.
In the present embodiment, the water-soluble liquid storage tank of heat exchanger, circulating pump, low-temperature molten salt passes sequentially through pipeline and connects and composes heat unit
Point.
In the present embodiment, the heat-storage medium is fused salt aqueous solution, it uses KNO3、NaNO3、Na2CO3、K2CO3Etc. nothings
One or more and water in machine salt mixes, and boiling point is up to 170 DEG C or more.
In the present embodiment, energy-accumulating medium of the fused salt aqueous solution as heating system, in thermal energy storage process, first
Electric furnace is opened, electric furnace converts electrical energy into thermal energy and passes to fused salt aqueous solution, and the temperature of fused salt aqueous solution is made to protect
It holds more than setting value, but is less than its boiling point.During heating, different spaces in storage tank are made by the stirring action of blender
The temperature of molten salt of position is uniformly distributed, and achievees the effect that eliminate temperature gradient in tank.In exothermic process, 170 DEG C or more molten
Saline solution exchanges heat under the action of water circulating pump with heating water return, and the temperature of fused salt aqueous solution drops to 95-105 DEG C and returns after heat exchange
To the water-soluble liquid storage tank of low-temperature molten salt.
It is described the invention in detail above by embodiment, but the content is only the exemplary implementation of the present invention
Example should not be construed as limiting the practical range of the present invention.Protection scope of the present invention is defined by the claims.All utilizations
Technical solutions according to the invention or those skilled in the art are under the inspiration of technical solution of the present invention, in the reality of the present invention
In matter and protection domain, designs similar technical solution and reach above-mentioned technique effect, or to made by application range
All the changes and improvements etc., the patent that should all still belong to the present invention cover within protection domain.
Claims (6)
1. a kind of fused salt aqueous solution energy-storage system, including the water-soluble liquid storage tank of fused salt, electric heater, blender, sewage draining exit, cycle
Pump, heat exchanger and heat user, which is characterized in that
Embedded on the head cover of the water-soluble liquid storage tank of fused salt to be equipped with electric heater, blender and circulating pump, the fused salt is water-soluble
Sewage draining exit is equipped with outside the bottom end of liquid storage tank；The water-soluble liquid storage tank of fused salt is connect with heat exchanger；The heat exchanger and heat user
Connection.
2. a kind of fused salt aqueous solution energy-storage system according to claim 1, which is characterized in that the circulating pump is vertical solution
Lower pump.
3. a kind of fused salt aqueous solution energy-storage system according to claim 1, which is characterized in that the blender is push type
Blender is on the central shaft of the water-soluble liquid storage tank of fused salt.
4. a kind of fused salt aqueous solution energy-storage system according to claim 1, which is characterized in that the water-soluble liquid storage tank of fused salt
Tank skin be both provided with external thermal insulation.
5. a kind of fused salt aqueous solution energy-storage system according to claim 1, which is characterized in that the heat-storage medium is fused salt
Aqueous solution, it uses KNO3、NaNO3、Na2CO3、K2CO3One or more and water in equal inorganic salts mixes.
6. a kind of fused salt aqueous solution energy-storage system according to claim 1, which is characterized in that the water-soluble liquid storage tank of fused salt
It may be configured as one or two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611126196.4A CN108613385A (en) | 2016-12-09 | 2016-12-09 | A kind of fused salt aqueous solution energy-storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611126196.4A CN108613385A (en) | 2016-12-09 | 2016-12-09 | A kind of fused salt aqueous solution energy-storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108613385A true CN108613385A (en) | 2018-10-02 |
Family
ID=63643408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611126196.4A Pending CN108613385A (en) | 2016-12-09 | 2016-12-09 | A kind of fused salt aqueous solution energy-storage system |
Country Status (1)
| Country | Link |
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| CN (1) | CN108613385A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120319410A1 (en) * | 2011-06-17 | 2012-12-20 | Woodward Governor Company | System and method for thermal energy storage and power generation |
| CN103836703A (en) * | 2014-03-13 | 2014-06-04 | 北京工业大学 | Molten salt heat storage type electric heating central heating system |
| CN105222205A (en) * | 2015-10-30 | 2016-01-06 | 百吉瑞（天津）新能源有限公司 | A kind of step heating system of electric power heating molten salt energy-storage |
| CN204963632U (en) * | 2015-08-31 | 2016-01-13 | 天津滨海储能技术有限公司 | High temperature energy storage fused salt jar that contains heat transfer, heating system |
| CN205137914U (en) * | 2015-11-03 | 2016-04-06 | 百吉瑞（天津）新能源有限公司 | Industry heating of electric power heating fused salt energy storage |
| CN206683225U (en) * | 2016-12-09 | 2017-11-28 | 百吉瑞（天津）新能源有限公司 | A kind of fused salt aqueous solution energy-storage system |
-
2016
- 2016-12-09 CN CN201611126196.4A patent/CN108613385A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120319410A1 (en) * | 2011-06-17 | 2012-12-20 | Woodward Governor Company | System and method for thermal energy storage and power generation |
| CN103836703A (en) * | 2014-03-13 | 2014-06-04 | 北京工业大学 | Molten salt heat storage type electric heating central heating system |
| CN204963632U (en) * | 2015-08-31 | 2016-01-13 | 天津滨海储能技术有限公司 | High temperature energy storage fused salt jar that contains heat transfer, heating system |
| CN105222205A (en) * | 2015-10-30 | 2016-01-06 | 百吉瑞（天津）新能源有限公司 | A kind of step heating system of electric power heating molten salt energy-storage |
| CN205137914U (en) * | 2015-11-03 | 2016-04-06 | 百吉瑞（天津）新能源有限公司 | Industry heating of electric power heating fused salt energy storage |
| CN206683225U (en) * | 2016-12-09 | 2017-11-28 | 百吉瑞（天津）新能源有限公司 | A kind of fused salt aqueous solution energy-storage system |
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