CN109959290A - Solid heat storage energy-storage system and energy-accumulating power station comprising it - Google Patents

Solid heat storage energy-storage system and energy-accumulating power station comprising it Download PDF

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Publication number
CN109959290A
CN109959290A CN201711340860.XA CN201711340860A CN109959290A CN 109959290 A CN109959290 A CN 109959290A CN 201711340860 A CN201711340860 A CN 201711340860A CN 109959290 A CN109959290 A CN 109959290A
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China
Prior art keywords
energy
storage
solid
import
outlet
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CN201711340860.XA
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Inventor
袁晓凤
陈兴伟
贾国斌
李明海
周翀
邹杨
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Shanghai Institute of Applied Physics of CAS
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Shanghai Institute of Applied Physics of CAS
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Priority to CN201711340860.XA priority Critical patent/CN109959290A/en
Publication of CN109959290A publication Critical patent/CN109959290A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/08Adaptations for driving, or combinations with, pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10Adaptations for driving, or combinations with, electric generators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/0056Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using solid heat storage material
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14Thermal energy storage

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a kind of solid heat storage energy-storage system and include its energy-accumulating power station, solid heat storage energy-storage system includes heat exchanger and generator unit, the outside wall surface of heat exchanger is equipped with hot side import, hot side outlet, cold side import and cold side outlet port, cold side outlet port is connected to generator unit and is connected with generator unit, solid heat storage energy-storage system further includes having energy-accumulating solid unit, energy-accumulating solid unit includes electric heater and storage heater, there is solid heat storage working medium in storage heater, electric heater is connected to storage heater and for heating solid heat storage working medium, it is connected between storage heater and heat exchanger and is formed with air loop.Energy-accumulating power station includes solid heat storage energy-storage system as above.The present invention has in high temperature section good in thermal property, and temperature range of operation is big, and long service life.It is conducted heat by air loop, is not necessarily to heat tracing in the process of running, frozen block and etching problem is also not present;And do not limited by geographical conditions, meanwhile, structure is simple, and it is easily manufactured, it is at low cost.

Description

Solid heat storage energy-storage system and energy-accumulating power station comprising it
Technical field
The present invention relates to a kind of technical field of energy storage, in particular to a kind of solid heat storage energy-storage system and the energy storage comprising it Power station.
Background technique
China's renewable energy is in the new period of quick extensive development, using wind-powered electricity generation and photovoltaic as the renewable of representative The energy has the characteristics that fluctuation and intermittent, and very big impact can be brought to the safety and stability of power grid on a large scale by being included in, therefore Abandonment, abandoning optical phenomenon are serious.The annual accumulative abandonment electricity in the whole nation in 2015 is 33,900,000,000 kilowatt hours, and average abandonment rate 15% abandons light Electricity is 46.87 hundred million kilowatt hours, averagely abandoning light rate 12.62%.On the other hand, as the continuous development of China's electric power facility is built If " paddy electricity " can not dissolve, problem is serious, up to 400,000,000 kilowatts of the unit at night " unemployed ", accounts for nearly the 38% of total installation of generating capacity.That , technically solve the problems, such as using wind-powered electricity generation and photovoltaic as the renewable energy of representative is grid-connected and the effective way of power grid peak-valley difference is Using energy storage technology.
Energy storage and compressed air storage currently, the energy storage technology that large-scale commercial is applied and cost is cheaper draws water Can, but requirement of both technologies to addressing is all excessively high, therefore does not have generality.It rose in recent years using fused salt as accumulation of heat The electrification energy storage power station of medium, since the melting temperature of fused salt is higher and high high-temp stability is poor, such as Solar salt About 220 degree of (NaNO3-KNO3,60-40wt.%) fusing point or so, maximum operation (service) temperature is no more than 650 DEG C, and in operational process Tracing thermal-insulating is needed, otherwise there are problems that fused salt frozen block.Meanwhile fused salt has corrosivity, causes system complex, and its container material And the key equipments such as pump, valve is costly, therefore system cost of electricity-generating is high.
Summary of the invention
The technical problem to be solved by the present invention is in order to overcome the problems, such as that there are frozen block, material corrosions in existing molten salt energy-storage power station Property, system complex, equipment requirement is high, it is at high cost the defects of, a kind of solid heat storage energy-storage system and the energy storage electricity comprising it are provided It stands.
The present invention is to solve above-mentioned technical problem by following technical proposals:
A kind of solid heat storage energy-storage system comprising have heat exchanger and generator unit, the outside wall surface of the heat exchanger is equipped with Hot side import, hot side outlet, cold side import and cold side outlet port, the cold side outlet port be connected to the generator unit and with the hair Electric unit is connected, it is characterized in that, the solid heat storage energy-storage system further includes having energy-accumulating solid unit, the energy-accumulating solid Unit includes electric heater and storage heater, has solid heat storage working medium in the storage heater, the electric heater is connected to institute It states storage heater and is used to heat the solid heat storage working medium, the outside wall surface of the storage heater is equipped with air inlet and air outlet, described Air inlet is connected to the hot side outlet, and the air outlet is connected to the hot side import, the storage heater and the heat exchanger Between be connected and be formed with air loop.
In the present solution, the melting temperature of solid heat storage working medium is high, it is better than fused salt, and running temperature in high temperature section hot property Range is big, solid heat storage working medium long service life.Meanwhile thermal coefficient is big, heat transfer rate is fast, can be by the heat at source center Amount outflow rapidly.
In addition, conducting heat by air loop, it is not necessarily to heat tracing in the process of running, also there is no frozen blocks and corrosion to ask Topic, it is not excessive to ambient enviroment in use to require, it is not limited by geographical conditions.Meanwhile structure is simple, it is easily manufactured, It is at low cost.
Preferably, the air loop is equipped with regulating valve, the energy-accumulating solid unit further includes having by-passing valve, the side The both ends of port valve are connected to the hot side outlet and the hot side import and are connected with the heat exchanger.
In the present solution, regulating valve is used to adjust by the hot air flowrate size of storage heater in air loop, meanwhile, it is other Port valve is protected during heat release for adjusting cold air flows size in bypass by the combined regulating of regulating valve and by-passing valve Card enters the air mass flow of heat exchanger and temperature is stablized, to ensure that the stable electric power output of generator unit.
Preferably, the energy-accumulating solid unit further includes having mixing chamber, one end of the mixing chamber is connected to the outlet air Mouth and the by-passing valve are simultaneously connected with the storage heater and the by-passing valve, and the other end of the mixing chamber is connected to the heat Side-entrance is simultaneously connected with the heat exchanger.
In the present solution, form using the above structure, passes through high temperature air and process that mixing chamber realizes storage heater discharge The cold air of by-passing valve is uniformly mixed, and will uniformly be entered in heat exchanger and be exchanged heat after mixing, ensure that power generation is single The stable electric power output of member.
Preferably, the air loop is equipped with shut-off valve.
In the present solution, form using the above structure, is used to control the switch of air loop, solid heat storage by shut-off valve Energy-storage system can be realized the air in air loop by shut-off valve and regulating valve and do not flow when accumulation of heat, reduce heat Loss.
Preferably, being additionally provided with blower on the air loop.
In the present solution, form using the above structure, passes through blower and provides the power of the hollow flow of air of air loop, guarantee The normal operation of air loop.
Preferably, the energy-accumulating solid unit further includes having controller, the controller is electrically connected to the electric heater With external power supply, and the controller be used to control the electric energy between the electric heater and the power supply of outside adjust and It cut-offs.
In the present solution, form using the above structure, passes through controller cut-offfing convenient for control energy-accumulating solid unit, improves The safety of energy-accumulating solid unit.
Preferably, the generator unit includes electrification component and cooler, the import of the electrification component is connected to described Cold side outlet port, the outlet of the electrification component are connected to the heat source import of the cooler, and the thermal source outlet of the cooler connects It is connected to the cold side import, being connected and be formed between the electrification component, the cooler and the heat exchanger generates electricity back Road.
In the present solution, form using the above structure, passes through electrification component in power generation circuit and realizes power generation.
In addition, the waste heat of generating working medium can be further utilized by cooler, for heating etc. to outside, into one Step reaches energy-saving effect,
Preferably, the electrification component includes steam turbine and generator, the generator is connected to the vapor wheel Machine is connected between the steam turbine, the cooler and the heat exchanger and is formed with the power generation circuit, the power generation Pump is provided on circuit.
Preferably, the electrification component includes turbine and generator, the generator is connected to the turbine, described Flat inlet and outlet is connected to the heat source import of the cold side outlet port and the cooler, and the generator unit further includes There are compressor, the compressor and the turbine by transmission axis connection, and the inlet and outlet of the compressor is separately connected Thermal source outlet and the cold side import in the cooler, the turbine, the cooler, the compressor and the heat exchange It is connected between device and is formed with the power generation circuit.
In the present solution, form using the above structure, is generated electricity using turbine, have heat to power output high-efficient, equipment Initial cost is few, and operating cost and maintenance cost are low, and highly-safe, addressing is flexible, has the advantages that modular development.
In addition, the waste heat of generating working medium can be further utilized by cooler, for heating etc. to outside, into one Step reaches energy-saving effect,
Preferably, the generator unit further includes having regenerator, the outside wall surface of the regenerator is equipped with heating import, heating Outlet, backheat import, backheat outlet, the heating import are connected to the turbine and are connected with the turbine, the heating Outlet be connected to the cooler and be connected with the cooler, the backheat import be connected to the compressor and with it is described Compressor is connected, and the backheat outlet is connected to the cold side import and is connected with the heat exchanger.
In the present solution, form using the above structure, by regenerator can the thermal energy to generating working medium further recycle It utilizes, reaches energy-saving effect.
A kind of energy-accumulating power station, it is characterized in that comprising there is solid heat storage energy-storage system as described above.
In the present solution, solid heat storage is in high temperature section good in thermal property, temperature range of operation is big, and long service life.Meanwhile It is not necessarily to heat tracing in the process of running, and is not limited by geographical conditions.Structure is simple, easily manufactured, at low cost.
On the basis of common knowledge of the art, above-mentioned each optimum condition, can any combination to get each preferable reality of the present invention Example.
The positive effect of the present invention is that:
Solid heat storage energy-storage system of the invention and the energy-accumulating power station comprising it carry out energy storage by solid heat storage working medium, In high temperature section good in thermal property, temperature range of operation is big, and long service life.It is conducted heat by air loop, in operational process In be not necessarily to heat tracing, also be not present frozen block and etching problem;And do not limited by geographical conditions, meanwhile, structure is simple, and it is easily manufactured, It is at low cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the energy-accumulating power station of the embodiment of the present invention 1.
Fig. 2 is the structural schematic diagram of the energy-accumulating power station of the embodiment of the present invention 2.
Description of symbols:
Energy-accumulating solid unit 1, storage heater 11, air inlet 111, air outlet 112, electric heater 12
Regulating valve 13, by-passing valve 14, mixing chamber 15, shut-off valve 16, blower 17, controller 18
Heat exchanger 2, hot side import 21, hot side outlet 22, cold side import 23, cold side outlet port 24
Generator unit 3, electrification component 31, generator 311, steam turbine 312, turbine 313
Cooler 32, heat source import 321, thermal source outlet 322, cold source import 323, cold source outlet 324
Pump 33, compressor 34, regenerator 35 heat import 351, heating exit 352
Backheat import 353, backheat outlet 354
Power supply 10
Specific embodiment
Illustrate below by the mode of embodiment and completely the present invention in conjunction with attached drawing to become apparent from, but therefore not incite somebody to action this It invents among the scope of embodiments being limited in.
Embodiment 1
As shown in Figure 1, the energy-accumulating power station of the present embodiment includes solid heat storage energy-storage system.The solid heat storage energy-storage system It include energy-accumulating solid unit 1, heat exchanger 2 and generator unit 3, the outside wall surface of heat exchanger 2 is equipped with hot side import 21, hot side outlet 22, cold side import 23 and cold side outlet port 24, cold side outlet port 24 are connected to generator unit 3 and are connected with generator unit 3.Solid stores Energy unit 1 includes electric heater 12 and storage heater 11, has solid heat storage working medium in storage heater 11, electric heater 12 is connected to Storage heater 11 is simultaneously used to heat solid heat storage working medium, and the outside wall surface of storage heater 11 is equipped with air inlet 111 and air outlet 112, air inlet Mouth 111 is connected to hot side outlet 22, and air outlet 112 is connected to hot side import 21, is connected simultaneously between storage heater 11 and heat exchanger 2 It is formed with air loop.
Energy-accumulating power station makes external power supply 10 in storage heater 11 when needing thermal storage and energy accumulation, through electric heater 12 Solid heat storage working medium is heated, and the solid heat storage working medium of low temperature is heated to the solid heat storage working medium of high temperature, so that electric It can be converted into thermal energy, to realize thermal energy storage in storage heater 11.When needing electricity consumption, the air in air loop will lead to It crosses air inlet 111 to enter in storage heater 11, air is directly contacted with the solid heat storage working medium of high temperature, the solid heat storage work of high temperature Matter transfers thermal energy to air, so that the temperature of air increases, the air of high temperature will be discharged by air outlet 112, Zhi Houzai It is entered in heat exchanger 2 by hot side import 21, the air of high temperature is transferred thermal energy in heat exchanger 2 by heat exchanger 2 Generating working medium, generating working medium will export by the cold side outlet port 24 of heat exchanger 2 and enter to generator unit 3, so that thermal energy exports To generator unit 3, mechanical energy is converted for the thermal energy of generating working medium by generator unit 3, electric energy is then converted to, to realize Power supply;Meanwhile will be discharged by hot side outlet 22 after the air heat-exchange of heat exchanger 2, it is entered to later by air inlet 111 In storage heater 11, to complete one cycle.
Solid heat storage working medium in storage heater 11 has melting temperature high, and thermal coefficient is big, and heat transfer rate is fast.Meanwhile High temperature section good in thermal property, temperature range of operation is big, and long service life.Preferably, solid heat storage working medium can use fusing point 1800 DEG C or more of refractory brick, refractory brick include magnesia brick, alumina brick or magnesium grey iron block etc., cheap, and are had good Good heat storage capacity.
It is conducted heat by air loop, is not necessarily to heat tracing in the process of running, frozen block and etching problem is also not present, makes It is required, is not limited by geographical conditions with not excessive to ambient enviroment in the process.Meanwhile the structure of energy-accumulating solid unit 1 is simple, system It makes conveniently, it is at low cost.
Electric heater 12 can using running temperature peak value can to 1000 DEG C or more of metal electrical heating elements or Nonmetallic electrical heating elements.Wherein, the electrical heating elements of metal include Aludirome and nichrome etc., nonmetallic Electrical heating elements include silicon carbide electric heater, molybdenum disilicide electric heater etc..Electric heater 12 is arranged in storage heater 11, Its arranged direction can be parallel with the vent passages in refractory brick in storage heater 11, can also hang down with the vent passages in refractory brick Directly.Since the length of silicon carbide electric heater is commonly between 1-2m, maximum length is within 4m;Molybdenum disilicide electric heater can Curtailment is made, usually between 0.5m-1.5m, and running temperature is higher, and it is shorter can to make length.Therefore, the electricity of metal adds The arranged direction of thermal element is vertical with the vent passages in refractory brick, the arranged directions of nonmetallic electrical heating elements can with it is resistance to Vent passages in firebrick are parallel or vertical.
Regulating valve 13 can be equipped on air loop.Regulating valve 13 is used to adjust the heat for passing through storage heater 11 in air loop Air mass flow size, when generating electricity at the beginning, regulating valve 13 can be turned the flow of air in air loop down, in the mistake of power generation Cheng Zhong, with the reduction of solid heat storage Temperature of Working, from small to large by air mass flow in the control air loop of regulating valve 13.Gu Body Storage Unit 1 can also include by-passing valve 14, and the both ends of by-passing valve 14 are connected to hot side outlet 22 and hot side import 21 and it is connected with heat exchanger 2.Part cold air is without accumulation of heat in the cold air for by by-passing valve 14 heat exchanger 2 being discharged Device 11 and after entering mixing chamber 15, be directly entered to heat exchanger 2, by the combined regulating of regulating valve 13 and by-passing valve 14, Guarantee that the air mass flow for entering heat exchanger 2 and temperature are stablized during heat release, to ensure that the stable electric power of generator unit 3 is defeated Out.
Energy-accumulating solid unit 1 can also include mixing chamber 15, and one end of mixing chamber 15 is connected to air outlet 112 and bypass Valve 14 is simultaneously connected with storage heater 11 and by-passing valve 14, the other end of mixing chamber 15 be connected to hot side import 21 and with heat exchanger 2 It is connected.Realize that the high temperature air that storage heater 11 is discharged uniformly is mixed with by the air of by-passing valve 14 by mixing chamber 15 It closes, will uniformly enter in heat exchanger 2 and exchange heat after mixing, ensure that the electric power output that energy-accumulating power station can be stable.
Air loop is equipped with shut-off valve 16.It is used to control the switch of air loop, solid heat storage storage by shut-off valve 16 Energy system can be realized the air in air loop by shut-off valve 16 and regulating valve 13 and do not flow when accumulation of heat, reduce Heat loss.
Air loop is equipped with blower 17.The power of the hollow flow of air of air loop is provided by blower 17.
Energy-accumulating solid unit 1 can also include controller 18, and controller 18 is electrically connected to electric heater 12 and outside Power supply 10, and the electric energy that controller 18 is used to control between electric heater 12 and the power supply 10 of outside is adjusted and is cut-off.Pass through control Device 18 processed cut-offs convenient for control energy-accumulating solid unit 1, improves the safety of energy-accumulating solid unit 1.Wherein, external power supply 10 can be the power generation power station in wind-power electricity generation power station, photovoltaic power generation power station or other unstable powers, and have extra electric energy Thermoelectricity power station.When external power supply 10 is by dispatching of power netwoks limited load, controller 18 can be according to dispatch command, will be unstable 18 feed-in electric heater 12 of electric energy via controller realizes that electric energy is converted into thermal energy and energy storage.
Generator unit 3 may include electrification component 31 and cooler 32, and the import of electrification component 31 is connected to cold side outlet port 24, the outlet of electrification component 31 is connected to the heat source import 321 of cooler 32, and the thermal source outlet 322 of cooler 32 is connected to cold Side-entrance 23 is connected between electrification component 31, cooler 32 and heat exchanger 2 and is formed with power generation circuit.
Generating working medium in power generation circuit heats up after being heated by heat exchanger 2, and the generating working medium after heating up enters To electrification component 31, realizes that thermal energy is converted into mechanical energy, realized and generated electricity by electrification component 31.Generating working medium passes through generating set It enters back into cooler 32 after part 31, can be connected to by cold source import 323 in cooler 32 and cold source outlet 324 outer Portion further further reaches the effect of cascaded utilization of energy for heating etc. to outside using the waste heat of generating working medium Fruit.Meanwhile generating working medium exchange heat in cooler 32 after will further temperature reduce, simultaneously by the outlet of cooler 32 output It enters in heat exchanger 2, realizes circulation.
Electrification component 31 may include having steam turbine 312 and generator 311, and generator 311 is connected to steam turbine 312, it is connected between steam turbine 312, cooler 32 and heat exchanger 2 and is formed with power generation circuit.By driving steam turbine 312 generate electricity.It is provided with pump 33 on power generation circuit, by the power flowed in 33 offer power generation circuit of pump, guarantees power generation circuit Normal operation.
Embodiment 2
As shown in Fig. 2, the energy-accumulating power station structure of the present embodiment and the same section of embodiment 1 are no longer repeated, only to difference Place explains.In the energy-accumulating power station of the present embodiment, electrification component 31 may include having turbine 313 and generator 311, power generation Machine 311 is connected to turbine 313, the inlet and outlet of turbine 313 be connected to the heat source of cold side outlet port 24 and cooler 32 into Mouth 321, generator unit 3 further includes having compressor 34, and compressor 34 passes through with turbine 313 is driven axis connection, and compressor 34 Inlet and outlet is connected to the thermal source outlet 322 and cold side import 23 of cooler 32, turbine 313, cooler 32, compressor It is connected between 34 and heat exchanger 2 and is formed with power generation circuit.
Generating working medium is heated up by heat exchanger 2, and the generating working medium after heating up enters to turbine 313, realizes heat It can be converted into mechanical energy, then power generation is realized by generator 311, generating working medium after turbine 313 by entering back into cooler 32, energy further further can be reached for heating etc. to outside using the waste heat of generating working medium by cooler 32 Measure the effect of cascade utilization.Meanwhile will further temperature be reduced after generating working medium heat exchange, it is exported by the outlet of cooler 32 And it enters in compressor 34;It is entered in heat exchanger 2, and followed by cold side import 23 by generating working medium after compressor 34 Ring utilizes.By power generation circuit combined cycle or cogeneration, reach energy-saving effect, and improves generating efficiency.Meanwhile it adopting It is generated electricity with turbine 313, has heat to power output high-efficient, investment of equipment is few, and operating cost and maintenance cost are low, safety Height, addressing is flexible, has the advantages that modular development.Wherein, the generating working medium in power generation circuit can be overcritical titanium dioxide Carbon, perhaps can be helium or can also be helium and nitrogen mixed gas.
Generator unit 3 can also include regenerator 35, and the outside wall surface of regenerator 35 is equipped with heating import 351, heats out Mouth 352, backheat import 353, backheat outlet 354, heating import 351 are connected to turbine 313 and are connected with turbine 313, heat Outlet 352 is connected to cooler 32 and is connected with cooler 32, backheat import 353 be connected to compressor 34 and with compressor 34 It is connected, backheat outlet 354 is connected to cold side import 23 and is connected with heat exchanger 2.
Generating working medium will be entered in regenerator 35 after by turbine 313 by heating import 351, and generate electricity work at this time The temperature of matter is higher, is high-temperature power generation working medium.And the generating working medium for passing through compressor 34 enters to backheat by backheat import 353 The temperature of device 35, the generating working medium is lower, is low-temperature electricity-generating working medium, and high-temperature power generation working medium transfers thermal energy to low-temperature electricity-generating work Cooler 32 will be entered to after matter by heating exit 352, low-temperature electricity-generating working medium will after receiving thermal energy and temperature raising It is entered in heat exchanger 2 by backheat outlet 354.By regenerator 35 benefit can be further recycled to the thermal energy of generating working medium With reaching energy-saving effect.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that this is only For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from Under the premise of the principle and substance of the present invention, many changes and modifications may be made, but these change and Modification each falls within protection scope of the present invention.

Claims (11)

1. a kind of solid heat storage energy-storage system comprising have heat exchanger and generator unit, the outside wall surface of the heat exchanger is equipped with heat Side-entrance, hot side outlet, cold side import and cold side outlet port, the cold side outlet port be connected to the generator unit and with the power generation Unit is connected, which is characterized in that the solid heat storage energy-storage system further includes having energy-accumulating solid unit, the energy-accumulating solid list Member includes electric heater and storage heater, has solid heat storage working medium in the storage heater, and the electric heater is connected to described For storage heater simultaneously for heating the solid heat storage working medium, the outside wall surface of the storage heater is equipped with air inlet and air outlet, it is described into Air port is connected to the hot side outlet, and the air outlet is connected to the hot side import, the storage heater and the heat exchanger it Between be connected and be formed with air loop.
2. solid heat storage energy-storage system as described in claim 1, which is characterized in that the air loop is equipped with regulating valve, The energy-accumulating solid unit further includes having by-passing valve, and the both ends of the by-passing valve are connected to the hot side outlet and the heat Side-entrance is simultaneously connected with the heat exchanger.
3. solid heat storage energy-storage system as claimed in claim 2, which is characterized in that the energy-accumulating solid unit further include have it is mixed Close room, one end of the mixing chamber be connected to the air outlet and the by-passing valve and with the storage heater and the by-passing valve phase Connection, the other end of the mixing chamber are connected to the hot side import and are connected with the heat exchanger.
4. solid heat storage energy-storage system as described in claim 1, which is characterized in that the air loop is equipped with shut-off valve.
5. solid heat storage energy-storage system as described in claim 1, which is characterized in that be additionally provided with blower on the air loop.
6. solid heat storage energy-storage system as described in claim 1, which is characterized in that the energy-accumulating solid unit further includes having control Device processed, the controller is electrically connected to the electric heater and external power supply, and the controller adds for controlling the electricity Electric energy between hot device and the power supply of outside is adjusted and is cut-off.
7. solid heat storage energy-storage system as described in claim 1, which is characterized in that the generator unit include electrification component and Cooler, the import of the electrification component are connected to the cold side outlet port, and the outlet of the electrification component is connected to the cooling The heat source import of device, the thermal source outlet of the cooler are connected to the cold side import, the electrification component, the cooler and It is connected between the heat exchanger and is formed with power generation circuit.
8. solid heat storage energy-storage system as claimed in claim 7, which is characterized in that the electrification component includes steam turbine And generator, the generator is connected to the steam turbine, between the steam turbine, the cooler and the heat exchanger It is connected and is formed with the power generation circuit, pump is provided on the power generation circuit.
9. solid heat storage energy-storage system as claimed in claim 7, which is characterized in that the electrification component includes turbine and hair Motor, the generator are connected to the turbine, and the inlet and outlet of the turbine is connected to the cold side outlet port and institute The heat source import of cooler is stated, the generator unit further includes having compressor, and the compressor and the turbine pass through transmission shaft Connection, and the inlet and outlet of the compressor be connected to the cooler thermal source outlet and the cold side import, institute It states and is connected between turbine, the cooler, the compressor and the heat exchanger and is formed with the power generation circuit.
10. solid heat storage energy-storage system as claimed in claim 9, which is characterized in that the generator unit further includes having backheat Device, the outside wall surface of the regenerator are equipped with heating import, heating exit, backheat import, backheat outlet, the heating import connection It is connected in the turbine and with the turbine, the heating exit is connected to the cooler and is connected with the cooler Logical, the backheat import is connected to the compressor and is connected with the compressor, and the backheat outlet is connected to described cold Side-entrance is simultaneously connected with the heat exchanger.
11. a kind of energy-accumulating power station, which is characterized in that it includes just like solid heat storage described in any one of claim 1-10 Energy-storage system.
CN201711340860.XA 2017-12-14 2017-12-14 Solid heat storage energy-storage system and energy-accumulating power station comprising it Pending CN109959290A (en)

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Cited By (5)

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CN111075668A (en) * 2019-12-06 2020-04-28 中国科学院电工研究所 Utilize electricity storage system of solid particle heat-retaining
CN112228852A (en) * 2020-10-14 2021-01-15 中国科学院上海应用物理研究所 Heat transfer and storage device, heat transfer and storage power generation system and energy storage power station
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