CN110159379A - The double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type - Google Patents
The double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type Download PDFInfo
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- CN110159379A CN110159379A CN201910514549.5A CN201910514549A CN110159379A CN 110159379 A CN110159379 A CN 110159379A CN 201910514549 A CN201910514549 A CN 201910514549A CN 110159379 A CN110159379 A CN 110159379A
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- molten salt
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- 150000003839 salts Chemical class 0.000 title claims abstract description 179
- 238000004146 energy storage Methods 0.000 title claims abstract description 82
- 230000005611 electricity Effects 0.000 title claims abstract description 61
- 230000002528 anti-freeze Effects 0.000 claims abstract description 93
- 239000007788 liquid Substances 0.000 claims abstract description 65
- 230000008018 melting Effects 0.000 claims abstract description 44
- 238000002844 melting Methods 0.000 claims abstract description 44
- 239000012530 fluid Substances 0.000 claims description 40
- 238000009825 accumulation Methods 0.000 claims description 26
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 238000010521 absorption reaction Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 230000002631 hypothermal effect Effects 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 6
- 230000008020 evaporation Effects 0.000 claims description 5
- 238000009833 condensation Methods 0.000 claims description 4
- 230000008014 freezing Effects 0.000 claims description 4
- 238000007710 freezing Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 2
- 239000000155 melt Chemical class 0.000 claims 1
- 238000009738 saturating Methods 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 25
- 230000008901 benefit Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005338 heat storage Methods 0.000 description 13
- 239000007789 gas Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000004209 hair Anatomy 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 235000011148 calcium chloride Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- -1 electric energy Chemical class 0.000 description 1
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 235000011147 magnesium chloride Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K21/00—Steam engine plants not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/02—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for the fluid remaining in the liquid phase
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
-
- 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
-
- 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
- F28D2020/0047—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 using molten salts or liquid metals
-
- 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
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention proposes a kind of double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type, it include: high temperature melting salt cellar, low-temperature molten salt tank, the antifreeze flow container of high temperature, low-temperature antifreeze liquid tank, compressor, first heat pump, low-temperature molten salt pump, high-temperature melting salt pump, turbine, second heat pump, the antifreeze liquid pump of high temperature, low-temperature antifreeze liquid pump, First Heat Exchanger, second heat exchanger and generator, by selectively unlocking high temperature melting salt cellar, low-temperature molten salt tank, the antifreeze flow container of high temperature, low-temperature antifreeze liquid tank, compressor, first heat pump, low-temperature molten salt pump, high-temperature melting salt pump, turbine, second heat pump, the antifreeze liquid pump of high temperature, low-temperature antifreeze liquid pump, First Heat Exchanger, one or more of second heat exchanger and generator, electric energy is mutually converted with thermal energy.The present invention can be realized stablizing for the renewable energy powers such as wind-powered electricity generation or photovoltaic power generation and export, and have balancing electric power supply and demand effect, can be realized extensive energy storage, plays energy storage peak shaving advantage, solves the problems, such as renewable energy energy storage.
Description
Technical field
The present invention relates to technical field of energy storage, in particular to the double tank molten salt energy-storage electricity generation systems of a kind of Multi-stage heat pump type.
Background technique
Fused salt heat-storage technology is in the heat accumulation stage, by the energy sources for heating fused salt such as electric energy, solar energy, by heat storage in height
In temperature molten salt.In the heat supply stage by high-temperature molten salt heat release, high-temperature molten salt discharges heat to heat user by heat exchange, discharges heat
Form be supply steam, by supply steam come diversified forms such as pushing turbine power generation, heat supplies, be applicable to photo-thermal power station
The energy-storage systems such as the renewable energy electricity such as light dissolve, trough-electricity utilizes are abandoned in heat accumulation, thermal power plant's peak regulation, abandonment, are played shifting peak and are filled out
Paddy, the effect for balancing thermal energy supply and demand.
Current proposes a kind of heat-pump-type alternating energy storage for power supply method and device in the related technology, including energy storage is for hot-die
Formula and power supply heat supply mode.Replace energy storage under energy storage heat supply and power supply heat supply mode respectively by two sets of hold over systems and releases energy
Have the function that energy storage and power supply.When using energy storage heat supply mode, room temperature working media is inhaled by the first hold over system equipressure
After heat, by compressor adiabatic compression, then by the second hold over system equipressure heat release, enters turbine adiabatic expansion afterwards and externally do
Function is finally discharged into the external world as the supply of heating source；Its device has then been sequentially connected in series inlet duct, along the trend of working gas
One heat exchanger, the first hold over system, compressor, the second heat exchanger, the second hold over system, turbine and air-out apparatus.Another mould
Formula is then heat and power supply mode, and room temperature working media is carried out isobaric after compressor adiabatic compression by the second hold over system
Heat absorption, externally does work subsequently into turbine adiabatic expansion, then isobaric heat release is carried out by the first hold over system, finally as warm
Gas source supply is discharged into the external world；The function exported only in the process is for powering.The program solves photovoltaic power generation and wind energy
The peak load shifting problem of abandonment and abandoning optical issue and peak-trough electricity in power generation, heats, and will while energy storage and power supply
The waste heat of exhaust gas is recovered in another hold over system, improves heat to power output efficiency.
However, above technical scheme has following defects that the cyclic module by room temperature working media at energy storage (storage)
Formula is: compression-heat release (passing through the second heat storage)-expansion work-heating-heat absorption (by the first heat storage)；Following when power supply
Ring mode is: compression-heat absorption (passing through the second heat storage)-expansion work-heat release (by the first heat storage)-heating.In energy storage
Under circulation pattern, full heat and cooling capacity cannot be stored up completely if using single tank energy storage；If, can Chu Manre using double tank energy storage
Amount and cooling capacity；Under power cycles mode, in order to be maintained as the second heat storage of high temperature heat source and as the of low-temperature heat source
The temperature difference and energy conversion efficiency of one heat storage, need to improve the temperature of the second heat storage, then system compresses are than improving, system high temperature
The demand that the temperature at end also improves, increases system to heat-resisting material；System is open circulation, when cycle fluid be helium,
It is not suitable for when the gases such as argon gas.
Summary of the invention
The present invention is directed at least solve one of above-mentioned technical problem.
For this purpose, it is an object of the invention to propose a kind of double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type, the system energy
That enough realizes the renewable energy powers such as wind-powered electricity generation or photovoltaic power generation stablizes output, has balancing electric power supply and demand effect, can be realized
Extensive energy storage plays energy storage peak shaving advantage, solves the problems, such as renewable energy energy storage.
To achieve the goals above, the embodiment of the present invention proposes a kind of Multi-stage heat pump type double tank molten salt energy-storage power generations system
System, comprising: energy storage device, the energy storage device include that high temperature melting salt cellar, low-temperature molten salt tank, the antifreeze flow container of high temperature, low temperature are antifreeze
Flow container, thermal energy are stored in high temperature melting salt cellar in the form of high-temperature molten salt thermal energy, are stored in the form of low-temperature antifreeze liquid thermal energy low
The antifreeze flow container of temperature；Energy conversion device, comprising: compressor, the first heat pump, the low-temperature molten salt being connected with the low-temperature molten salt tank
Pump, high-temperature melting salt pump, turbine, the second heat pump, the height being connected with the antifreeze flow container of the high temperature being connected with the high temperature melting salt cellar
Warm antifreeze liquid pump, low-temperature antifreeze liquid pump, First Heat Exchanger, the second heat exchanger and the power generation being connected with the low-temperature antifreeze liquid tank
Machine, wherein by selectively unlock by the high temperature melting salt cellar, low-temperature molten salt tank, the antifreeze flow container of high temperature, low-temperature antifreeze liquid tank,
Compressor, the first heat pump, low-temperature molten salt pump, high-temperature melting salt pump, turbine, the second heat pump, the antifreeze liquid pump of high temperature, low-temperature antifreeze liquid
One or more circuits constituted in pump, First Heat Exchanger, the second heat exchanger and generator, to convert electrical energy into thermal energy,
Or convert heat energy into electric energy.
In addition, the double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type according to the above embodiment of the present invention can also have as
Under additional technical characteristic:
In some instances, it when converting electrical energy into thermal energy, opens by the compressor, the first heat pump, turbine, second
The circuit that heat pump is constituted converts electrical energy into hot gaseous working medium, described in being driven by electricity by being driven by electricity the compressor
First heat pump, hot gaseous working medium heat fused salt, and temperature of molten salt increases, and low-temperature molten salt pump driving fused salt is flowed out from low-temperature molten salt tank,
The first heat pump is flowed through, fused salt flows to high temperature melting salt cellar after being heated, complete the heat accumulation at system high temperature end.
In some instances, after the hot gaseous working medium flows through the turbine, temperature is reduced, by being driven by electricity described the
Two heat pumps, cold gaseous working medium are absorbed heat from anti-icing fluid, and anti-icing fluid temperature reduces, and the antifreeze liquid pump of high temperature drives anti-icing fluid, anti-from high temperature
Freeze flow container outflow, flow through the second heat pump, low-temperature antifreeze liquid tank is flowed to after anti-icing fluid heat release, completes the heat accumulation at system hypothermia end.
In some instances, wherein the heat of hot gaseous working medium is transferred in fused salt by first heat pump, in the first heat
The low-temperature end of pump, heating working medium are absorbed heat by evaporation from hot gaseous working medium, and in the temperature end of the first heat pump, heating working medium passes through cold
It coagulates to low-temperature molten salt heat release, low-temperature molten salt is converted to high-temperature molten salt, flows to high temperature melting salt cellar.
In some instances, wherein the heat of low-temperature antifreeze liquid is transferred in cold gaseous working medium by second heat pump,
The temperature end of second heat pump, refrigeration working medium is by condensing to cold gaseous working medium heat release, in the low-temperature end of the second heat pump, refrigeration working medium
It is absorbed heat by evaporation from high temperature anti-icing fluid, high temperature anti-icing fluid is converted to low-temperature antifreeze liquid, flows to low-temperature antifreeze liquid tank.
In some instances, when heat accumulation is completed, the high temperature melting salt cellar canful, the low-temperature molten salt tank is emptied, described
Low-temperature antifreeze liquid tank canful, the antifreeze flow container emptying of high temperature.
In some instances, when converting heat energy into electric energy, first heat pump and the second heat pump are closed, opens first
Heat exchanger and the second heat exchanger open the circuit being made of the compressor, First Heat Exchanger, turbine, the second heat exchanger.
In some instances, wherein by the compressor work compressed gaseous working medium, high-temperature molten salt is by high-temperature melting salt pump
Driving, flows out from high temperature melting salt cellar, and heated gaseous working medium when high-temperature molten salt flows through First Heat Exchanger flows to low-temperature molten salt after heat exchange
Tank, makes hot gaseous working medium expansion work, pushes turbine rotation to drive electrical power generators, after the acting of hot gaseous working medium, flows through the
Two heat exchangers, to low-temperature antifreeze liquid heat release, low-temperature antifreeze liquid is pumped by low-temperature antifreeze liquid and is driven, and is flowed out, is changed from low-temperature antifreeze liquid tank
The antifreeze flow container of high temperature is flowed to after heat.
In some instances, when electric discharge is completed, the high temperature melting salt cellar is emptied, low-temperature molten salt tank canful, and low temperature is antifreeze
Flow container emptying, the antifreeze flow container canful of high temperature.
In some instances, the freezing point of the anti-icing fluid is lower than 0 DEG C, and operating temperature is -70 DEG C~0 DEG C.
The double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type according to an embodiment of the present invention have energy using closed cycle
Measure high conversion efficiency, cold, two-stage heat pump hot/cold, system high temperature end and low-temperature end temperature using fused salt heat accumulation and anti-icing fluid storage
The advantages of the temperature difference is stable, safe and reliable, cleaning low-carbon, utilize same set of system to realize energy storage and power generation；Utilize two-stage heat pump
The temperature difference of hot merit circulation is improved, system gross energy transfer efficiency is improved, reduces each heat pump compression ratio, reduces equipment cost；It is logical
Cross reduce system hypothermia end temperature, while ensuring system gross energy transfer efficiency, reduce system high temperature end temperature and
Requirement to high temperature resistant equipment；The system can stabilize the unstability of the renewable energy power generations such as wind-powered electricity generation or photovoltaic power generation, reality
Existing renewable energy power stablizes output, alleviation abandonment is abandoned optical issue, thermal power plant's peak regulation, trough-electricity and utilized；The system is to close
Formula circulation, realizes zero-emission and working medium range of choice is wide.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the structural representation of the double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type according to an embodiment of the invention
Figure.
Fig. 2 is that double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type accord to a specific embodiment of that present invention are empty in compression
Structure and operating parameter schematic diagram when gas energy storage recycles；
Fig. 3 is that double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type accord to a specific embodiment of that present invention are empty in compression
Operating parameter curve graph when gas energy storage recycles；
Fig. 4 is that double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type accord to a specific embodiment of that present invention are done in turbine
Structure and operating parameter schematic diagram when function recycles；
Fig. 5 is that double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type accord to a specific embodiment of that present invention are done in turbine
Operating parameter curve graph when function recycles；
Fig. 6 is double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type accord to a specific embodiment of that present invention in the first heat
Structure and operating parameter schematic diagram when pump circulation；
Fig. 7 is double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type accord to a specific embodiment of that present invention in the first heat
Operating parameter curve graph when pump circulation；
Fig. 8 is double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type accord to a specific embodiment of that present invention in the second heat
Structure and operating parameter schematic diagram when pump circulation；
Fig. 9 is double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type accord to a specific embodiment of that present invention in the second heat
Operating parameter curve graph when pump circulation.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply opposite
Importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
The double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type according to an embodiment of the present invention are described below in conjunction with attached drawing.
Fig. 1 is the structural representation of the double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type according to an embodiment of the invention
Figure.The double tank molten salt energy-storage electricity generation systems of the Multi-stage heat pump type include energy storage device (not shown) and energy conversion device (figure
In be not shown).
Wherein, as shown in Figure 1, energy storage device includes 4 high thermally insulated tanks of thermal insulation property, specifically include high temperature melting salt cellar 5,
The antifreeze flow container 9 of low-temperature molten salt tank 3, high temperature, low-temperature antifreeze liquid tank 11, thermal energy are stored in high temperature melting in the form of high-temperature molten salt thermal energy
Salt cellar 5 is stored in low-temperature antifreeze liquid tank 11 in the form of low-temperature antifreeze liquid thermal energy.When heat accumulation completion (converts electrical energy into heat
Can complete) when, 5 canful of high temperature melting salt cellar, low-temperature molten salt tank 3 empties, 11 canful of low-temperature antifreeze liquid tank, antifreeze 9 row of flow container of high temperature
It is empty.
In one embodiment of the invention, the anti-icing fluid using freezing point lower than 0 DEG C is antifreeze as low-temperature end cold storage material
- 70 DEG C of liquid operating temperature~0 DEG C, anti-icing fluid can be but be not limited to ethanol water, glycol water, glycerin solution,
Saline solution (calcium chloride, magnesium chloride, sodium nitrate, sodium nitrite)；It is stored up using low melting point salt (nitrate, villaumite) as temperature end
Thermal medium reduces the risk of fused salt solidification and the requirement that system is anti-condensation for fused salt.Due to reducing the work of anti-icing fluid
Temperature, therefore the temperature at system high temperature end is reduced while guaranteeing system capacity transfer efficiency, system is reduced for valuableness
Heat-resisting material demand.
Energy conversion device converts electrical energy into form of thermal energy storage using electrical energy drive gaseous working medium circulation and two sets of heat pumps
It deposits.Energy conversion device specifically includes: compressor 1, the first heat pump 2, the low-temperature molten salt pump 4 and height being connected with low-temperature molten salt tank 3
The connected high-temperature melting salt pump 6 of temperature molten salt tank 5, turbine 7, the second heat pump 8, the antifreeze liquid pump of high temperature being connected with the antifreeze flow container 9 of high temperature
10, low-temperature antifreeze liquid pump 12, First Heat Exchanger 13, the second heat exchanger 14 and the generator 15 being connected with low-temperature antifreeze liquid tank 11.
Specifically, antifreeze by high temperature melting salt cellar 5, low-temperature molten salt tank 3, the antifreeze flow container 9 of high temperature, low temperature by selectively unlocking
Flow container 11, compressor 1, the first heat pump 2, low-temperature molten salt pump 4, high-temperature melting salt pump 6, turbine 7, the second heat pump 8, the antifreeze liquid pump of high temperature
10, one or more times constituted in low-temperature antifreeze liquid pump 12, First Heat Exchanger 13, the second heat exchanger 14 and generator 15
Road to convert electrical energy into thermal energy, or converts heat energy into electric energy.
The heat accumulation stage (converts electrical energy into the stage of thermal energy), and gaseous working medium carries out the inverse circulation of Brayton cycle.Gas
State working medium can be air, nitrogen, helium, argon gas, hydrogen.When converting electrical energy into thermal energy, open by the 1, first heat of compressor
The circuit that pump 2, turbine 7, the second heat pump 8 are constituted converts electrical energy into the energy of hot gaseous working medium by power driven compressor 1
Amount；By being driven by electricity the first heat pump 2, hot gaseous working medium heats fused salt, and temperature of molten salt increases, 4 driving fused salt of low-temperature molten salt pump
It is flowed out from low-temperature molten salt tank 3, flows through the first heat pump 2, fused salt flows to high temperature melting salt cellar 5 after being heated, complete system high temperature end
Heat accumulation.
Further, after hot gaseous working medium flows through turbine 7, temperature is reduced, by being driven by electricity the second heat pump 8, cold gaseous
Working medium is absorbed heat from anti-icing fluid, and anti-icing fluid temperature reduces, and the antifreeze liquid pump 10 of high temperature drives anti-icing fluid, is flowed out from the antifreeze flow container 9 of high temperature,
The second heat pump 8 is flowed through, low-temperature antifreeze liquid tank 11 is flowed to after anti-icing fluid heat release, completes the heat accumulation at system hypothermia end.
Wherein, the heat of hot gaseous working medium is transferred in fused salt by the first heat pump 2, in the low-temperature end of the first heat pump 2, heating
Working medium is absorbed heat by evaporation from hot gaseous working medium, in the temperature end of the first heat pump 2, is heated working medium and is put by condensing to low-temperature molten salt
Heat, low-temperature molten salt are converted to high-temperature molten salt, flow to high temperature melting salt cellar 5.
Wherein, the heat of low-temperature antifreeze liquid is transferred in cold gaseous working medium by the second heat pump 8, in the high temperature of the second heat pump 8
End, refrigeration working medium is by condensation to cold gaseous working medium heat release, and in the low-temperature end of the second heat pump 8, refrigeration working medium is by evaporating from height
Warm anti-icing fluid heat absorption, high temperature anti-icing fluid are converted to low-temperature antifreeze liquid, flow to low-temperature antifreeze liquid tank 11.
When converting heat energy into electric energy (i.e. power generating stage), the first heat pump 2 and the second heat pump are closed by respective valves
8, First Heat Exchanger 13 and the second heat exchanger 14 are opened, is opened by compressor 1, First Heat Exchanger 13, turbine 7, the second heat exchanger
14 circuits constituted, to start the power cycle of thermo-electrically conversion, which is the inverse process of electric-thermal conversion, can be reduced to level pressure
Heat power cycle.
Wherein, by the acting compressed gaseous working medium of compressor 1, high-temperature molten salt is driven by high-temperature melting salt pump 6, from high-temperature molten salt
Tank 5 flows out, and heated gaseous working medium when high-temperature molten salt flows through First Heat Exchanger 13 flows to low-temperature molten salt tank 3, makes hot gaseous after heat exchange
Working medium expansion work pushes the rotation of turbine 7 to drive generator 15 to generate electricity, and after the acting of hot gaseous working medium, flows through the second heat exchanger
14, to low-temperature antifreeze liquid heat release, low-temperature antifreeze liquid is flowed out, heat exchange by 12 driving of low-temperature antifreeze liquid pump from low-temperature antifreeze liquid tank 11
After flow to the antifreeze flow container 9 of high temperature.
When electric discharge is completed and (converts heat energy into electric energy to complete), high temperature melting salt cellar 5 is emptied, 3 canful of low-temperature molten salt tank,
Low-temperature antifreeze liquid tank 11 empties, antifreeze 9 canful of flow container of high temperature.Further, system can start energy storing and electricity generating circulation next time.
As specific embodiment, the double tank molten salt energy-storage electricity generation systems of Fig. 2 exemplary illustration Multi-stage heat pump type are being compressed
Structure and operating parameter when air energy storage recycles.The double tank molten salt energy-storage electricity generation systems of Fig. 3 exemplary illustration Multi-stage heat pump type
Operating parameter curve in compressed-air energy storage circulation.The double tank molten salt energy-storages power generations of Fig. 4 exemplary illustration Multi-stage heat pump type
Structure and operating parameter of the system in turbine power cycle.The double tank molten salt energy-storages hairs of Fig. 5 exemplary illustration Multi-stage heat pump type
Operating parameter curve of the electric system in turbine power cycle.The double tank molten salt energy-storages hairs of Fig. 6 exemplary illustration Multi-stage heat pump type
Structure and operating parameter of the electric system in the first heat pump cycle.The double tank molten salt energy-storages of Fig. 7 exemplary illustration Multi-stage heat pump type
Operating parameter curve of the electricity generation system in the first heat pump cycle.The double tank molten salt energy-storage electricity generation systems of Fig. 8 Multi-stage heat pump type are the
Structure and operating parameter when two heat pump cycles.The double tank molten salt energy-storage electricity generation systems of Fig. 9 exemplary illustration Multi-stage heat pump type exist
Operating parameter curve when the second heat pump cycle.
As specific embodiment, table 1 illustrates the example values of primary operating parameter.
Table 1
To sum up, the double tank molten salt energy-storage electricity generation systems of the above-mentioned Multi-stage heat pump type of the present invention, in the heat accumulation stage, gaseous working medium into
Row compression-heat release-expansion work-heat absorption circulation, extraneous to system net inputing power, gaseous working medium passes through heat pump from anti-icing fluid
It absorbs heat, to fused salt heat release, hot gaseous working medium passes through the first heat pump fused salt as low-grade heat source；Cold gaseous working medium passes through the
Two heat pumps are anti-icing fluid refrigeration.By the combined operating of gaseous working medium circulation and two sets of heat pumps, heat pump compression ratio is reduced, is realized
The double tank molten salt energy-storage electricity generation systems of heat-pump-type high temperature melting salt cellar heat accumulation, store up in low-temperature antifreeze liquid tank it is cold, by heat from system
Low-temperature heat source be transmitted to high temperature heat source, the temperature difference of whole system temperature end and low-temperature end is effectively improved, to improve and be
The efficiency that heat accumulation of uniting generates electricity.In power generating stage, gaseous working medium carries out level pressure and heats power cycle process: compression-heat absorption-expansion is done
Function-heat release, system outwardly export electric energy only, and by heat exchanger from fused salt heat absorption, to anti-icing fluid heat release, turbine is done gaseous working medium
Function is greater than compressor work, and driven generator power generation, the function that system outwardly exports only is for powering.Due to whole in energy storage stage
The temperature difference of a system high temperature end and low-temperature end improves, the improved efficiency of system heat accumulation power generation.
The system is using the main dress of compressor-heat pump/heat exchanger-turbine-heat pump/heat exchanger composition gaseous working medium circulation
It sets, realizes by reciprocal electric-thermal conversion cycle and thermo-electrically conversion cycle using same system and utilize same system heat accumulation
And power generation, simplify system, reduce costs.
The system uses low melting point fused salt as temperature end heat-storage medium, using the anti-icing fluid compared with low freezing point as low-temperature end
Heat-storage medium, the working medium using gaseous working medium as heat accumulation and power generation cycle.Fused salt is a kind of low melting point salt, and it is solidifying to reduce fused salt
Solid the requirement anti-condensation for fused salt of risk and system.The operating temperature of anti-icing fluid reduces, therefore is guaranteeing system capacity conversion
While efficiency, the temperature end temperature for reducing the double tank molten salt energy-storage electricity generation systems of heat-pump-type is realized, reduces system for valuableness
High temperature resistant equipment and material demand, reduce system cost.Further, gaseous working medium is in heat accumulation and power generating stage
Closed cycle, no discharge is pollution-free, realizes cleaning low-carbon, energy-efficient energy storage mode.
The system is using high temperature melting salt cellar, low-temperature molten salt tank, the antifreeze flow container of high temperature, low-temperature antifreeze liquid tank difference heat accumulation, storage
Cold mode, avoids the blending of high temperature energy-storage medium and low temperature energy-accumulating medium, effectively maintains temperature end and low-temperature end temperature
Degree it is constant, maintain the temperature difference of system high temperature end and low-temperature end, it is ensured that system heat accumulation power generation efficiency.This system provides
It is a kind of be generally applicable to thermoelectricity peak regulation, the unstability for stabilizing the renewable energy power generations such as wind-powered electricity generation or photovoltaic power generation, peak load shifting,
Alleviate the energy storage mode for the problems such as light is abandoned in abandonment.
In other words, the system be it is a kind of by fused salt heat accumulation and anti-icing fluid storage it is cold based on, added for fused salt using two-stage heat pump
The closed cycle energy-storing and power-generating system that heat and anti-icing fluid are freezed, generated electricity using turbine and compressor work, is suitable for thermal power plant's tune
The energy storage of the renewable energy such as peak, wind-powered electricity generation and photovoltaic, trough-electricity such as utilize at the fields.It is unstable and intermittent for renewable energy
Feature, the energy-storing and power-generating system can stabilize the renewable energy power generations such as wind-powered electricity generation or photovoltaic power generation unstability, realize can be again
Raw electricity power stablizes output, has balancing electric power supply and demand effect, can be realized extensive energy storage, plays energy storage peak shaving advantage,
Solve the problems, such as renewable energy energy storage.The system uses the temperature of two-stage heat pump lifting system temperature end, reduces system hypothermia end
Temperature, reduce the compression ratio of every level-one heat pump；By the way of reducing system hypothermia end temperature, guaranteeing energy conversion effect
While rate, lower system high temperature end temperature is realized, reduces demand of the system to heat-resisting material；System is followed for enclosed
Ring, realizes zero-emission and working medium range of choice is wide.
The working principle of the system can be summarized are as follows: using fused salt as temperature end heat-storage medium, using anti-icing fluid as low
Warm end heat-storage medium, the working medium using gaseous working medium as heat accumulation and power generation cycle.In the heat accumulation stage, gaseous working medium is pressed
Contracting-heat release (passing through the first heat pump)-expansion work-heat absorption (by the second heat pump) cyclic process, gaseous working medium is from anti-icing fluid
It absorbs heat, to fused salt heat release, hot gaseous working medium, by the first heat pump fused salt, is flowed as low-grade heat source after low-temperature molten salt heat exchange
It is stored to high temperature melting salt cellar；Cold gaseous working medium is freezed by the cooling anti-icing fluid of the second heat pump for anti-icing fluid, the heat exchange of high temperature anti-icing fluid
After flow to low-temperature antifreeze liquid tank storage.High temperature heat is stored in high temperature melting salt cellar；Low-temperature heat quantity is stored in low-temperature antifreeze liquid tank
It is interior.The total work of this stage, compressor work and heat pump acting does work greater than turbine, extraneous to system net inputing power；It is generating electricity
Stage, gaseous working medium carry out level pressure and heat power cycle process: compression-heat absorption (passing through First Heat Exchanger)-expansion work-heat release
(passing through the second heat exchanger), gaseous working medium absorb heat from fused salt, to anti-icing fluid heat release, and turbine acting at this time is greater than compressor work,
Driven generator power generation, the function that system outwardly exports only is for powering.
The double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type according to an embodiment of the present invention have energy using closed cycle
Measure high conversion efficiency, cold, two-stage heat pump hot/cold, system high temperature end and low-temperature end temperature using fused salt heat accumulation and anti-icing fluid storage
With the advantages of temperature difference is stable, safe and reliable, cleaning low-carbon, same set of system is utilized to realize energy storage and power generation；Utilize two-stage heat pump
The temperature difference of hot merit circulation is improved, system gross energy transfer efficiency is improved, reduces each heat pump compression ratio, reduces equipment cost；It is logical
Cross reduce system hypothermia end temperature, while ensuring system gross energy transfer efficiency, reduce system high temperature end temperature and
Requirement to high temperature resistant equipment；The system can stabilize the unstability of the renewable energy power generations such as wind-powered electricity generation or photovoltaic power generation, reality
Existing renewable energy power stablizes output, alleviation abandonment is abandoned optical issue, thermal power plant's peak regulation, trough-electricity and utilized；The system is to close
Formula circulation, realizes zero-emission and working medium range of choice is wide.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is by claim and its equivalent limits.
Claims (10)
1. a kind of double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type characterized by comprising
Energy storage device, the energy storage device include high temperature melting salt cellar, low-temperature molten salt tank, the antifreeze flow container of high temperature, low-temperature antifreeze liquid tank,
Thermal energy is stored in high temperature melting salt cellar in the form of high-temperature molten salt thermal energy, and it is antifreeze to be stored in low temperature in the form of low-temperature antifreeze liquid thermal energy
Flow container；
Energy conversion device, comprising: compressor, the first heat pump, be connected with the low-temperature molten salt tank low-temperature molten salt pump, with it is described
The connected high-temperature melting salt pump of high temperature melting salt cellar, turbine, the second heat pump, the high temperature anti-icing fluid being connected with the antifreeze flow container of the high temperature
Pump, low-temperature antifreeze liquid pump, First Heat Exchanger, the second heat exchanger and the generator being connected with the low-temperature antifreeze liquid tank, wherein
By selectively unlocking by the high temperature melting salt cellar, low-temperature molten salt tank, the antifreeze flow container of high temperature, low-temperature antifreeze liquid tank, compression
Machine, the first heat pump, low-temperature molten salt pump, high-temperature melting salt pump, turbine, the second heat pump, the antifreeze liquid pump of high temperature, low-temperature antifreeze liquid pump, the
One or more circuits constituted in one heat exchanger, the second heat exchanger and generator, to convert electrical energy into thermal energy, or will be hot
Electric energy can be converted to.
2. the double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type according to claim 1, which is characterized in that turn by electric energy
When being changed to thermal energy, the circuit being made of the compressor, the first heat pump, turbine, the second heat pump is opened, it is described by being driven by electricity
Compressor converts electrical energy into hot gaseous working medium, and by being driven by electricity first heat pump, hot gaseous working medium heats fused salt, melts
Salt temperature increases, and low-temperature molten salt pump driving fused salt is flowed out from low-temperature molten salt tank, flows through the first heat pump, and fused salt flows to high after being heated
Temperature molten salt tank completes the heat accumulation at system high temperature end.
3. the double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type according to claim 2, which is characterized in that the hot gaseous
After working medium flows through the turbine, temperature is reduced, and by being driven by electricity second heat pump, cold gaseous working medium is absorbed heat from anti-icing fluid,
Anti-icing fluid temperature reduces, and the antifreeze liquid pump of high temperature drives anti-icing fluid, from the antifreeze flow container outflow of high temperature, flows through the second heat pump, anti-icing fluid
Low-temperature antifreeze liquid tank is flowed to after heat release, completes the heat accumulation at system hypothermia end.
4. the double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type according to claim 2, which is characterized in that wherein, described
The heat of hot gaseous working medium is transferred in fused salt by the first heat pump, in the low-temperature end of the first heat pump, heat working medium by evaporation from
The heat absorption of hot gaseous working medium heats working medium by condensation to low-temperature molten salt heat release, low-temperature molten salt is converted in the temperature end of the first heat pump
For high-temperature molten salt, high temperature melting salt cellar is flowed to.
5. the double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type according to claim 3, which is characterized in that wherein, described
The heat of low-temperature antifreeze liquid is transferred in cold gaseous working medium by the second heat pump, and in the temperature end of the second heat pump, refrigeration working medium passes through
It condenses to cold gaseous working medium heat release, in the low-temperature end of the second heat pump, refrigeration working medium is absorbed heat by evaporation from high temperature anti-icing fluid, high temperature
Anti-icing fluid is converted to low-temperature antifreeze liquid, flows to low-temperature antifreeze liquid tank.
6. the double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type according to claim 1-5, which is characterized in that when
When heat accumulation is completed, the high temperature melting salt cellar canful, the low-temperature molten salt tank emptying, the low-temperature antifreeze liquid tank canful, the height
The antifreeze flow container emptying of temperature.
7. the double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type according to claim 1, which is characterized in that turn by thermal energy
When being changed to electric energy, first heat pump and the second heat pump are closed, opens First Heat Exchanger and the second heat exchanger, is opened by the pressure
The circuit that contracting machine, First Heat Exchanger, turbine, the second heat exchanger are constituted.
8. the double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type according to claim 7, which is characterized in that wherein, pass through
The compressor work compressed gaseous working medium, high-temperature molten salt are driven by high-temperature melting salt pump, flow out from high temperature melting salt cellar, high-temperature molten salt
Heated gaseous working medium when flowing through First Heat Exchanger, flows to low-temperature molten salt tank after heat exchange, makes hot gaseous working medium expansion work, pushes saturating
Flat turn is dynamic to drive electrical power generators the second heat exchanger to be flowed through, to low-temperature antifreeze liquid heat release, low temperature after the acting of hot gaseous working medium
Anti-icing fluid is pumped by low-temperature antifreeze liquid and is driven, and flows out from low-temperature antifreeze liquid tank, the antifreeze flow container of high temperature is flowed to after heat exchange.
9. the double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type according to claim 7 or 8, which is characterized in that work as electric discharge
When completion, the high temperature melting salt cellar emptying, low-temperature molten salt tank canful, the emptying of low-temperature antifreeze liquid tank, the antifreeze flow container canful of high temperature.
10. the double tank molten salt energy-storage electricity generation systems of Multi-stage heat pump type according to claim 9, which is characterized in that described antifreeze
The freezing point of liquid is lower than 0 DEG C, and operating temperature is -70 DEG C~0 DEG C.
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