CN203925901U - Solar light-heat power-generation system - Google Patents
Solar light-heat power-generation system Download PDFInfo
- Publication number
- CN203925901U CN203925901U CN201420344850.9U CN201420344850U CN203925901U CN 203925901 U CN203925901 U CN 203925901U CN 201420344850 U CN201420344850 U CN 201420344850U CN 203925901 U CN203925901 U CN 203925901U
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- heat
- energy
- liquid metal
- battery
- working medium
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
-
- 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
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- Engine Equipment That Uses Special Cycles (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of heat energy electric energy with storage power generation system, liquid metal cell body group string is placed on later to the storage tank tank interior of heat reservoir, also using the body of the high temperature fluent metal battery of sensible heat heat accumulation as heat accumulation working medium, for it increases heat exchanging pipe and combining inverter, jointly form heat energy-electric energy with storage power generation system with traditional heat reservoir, save the independent installation cost of battery and heat accumulation working medium cost, can also increase more heat storage capacity.Heat reservoir of the present utility model can provide necessary high-temperature work environment for liquid metal cell; Electrical network electric energy takes liquid metal cell charging for being greater than, and liquid metal cell even can be used as heater element unnecessary electrical network electric energy energy transform into heat energy is stored, and regulates electrical network imbalance between supply and demand.The operating mode flexibility that the utility model while heat energy storage and electric energy have improved power generation system greatly, creates more operating modes, meets electrical network and power demands.
Description
Technical field
The utility model relates to a kind of solar light-heat power-generation system.
Background technique
Heat reservoir in existing solar light-heat power-generation system is two holding vessels of configuration conventionally, deposit respectively high temperature refrigerant and cryogenic fluid.The heat energy that heat reservoir stores, derives from solar-energy light collector, enters high-temperature storage tank stand-by after cryogenic fluid is heated; In the time of solar energy deficiency or disappearance, high temperature refrigerant can continue as steam turbine provides high-temperature steam to use for generating; After heat exchange, the temperature of heat accumulation working medium reduces, and enters cryogenic tank wait and is reheated.This energy-storage system is taking heat accumulation as main, and its heat accumulation working medium can only heat energy storage, can not store electrical energy, and mode of operation is limited in the daytime exoergic pattern at energy storage-night, and energy can only be with electric energy pattern feed-in electrical network, can not two-way flow.
Model utility content
The purpose of this utility model is to provide a kind of solar light-heat power-generation system that can store heat energy again can storage of electrical energy.
This solar light-heat power-generation system that the utility model provides, comprises electric power storage system and heat reservoir;
Electric power storage system comprises two liquid metal cells and grid-connected converter, and two liquid metal cell series connection form battery pack, and the DC bus capacitor device of described battery pack and grid-connected converter is connected in parallel, and grid-connected converter is connected with electrical network;
The liquid metal cell being positioned in high-temperature storage tank is high temperature fluent metal battery, and the liquid metal cell being positioned in low-temperature storage tank is low temperature liquid metal battery;
Heat reservoir comprises solar energy heat trap, high-temperature storage tank, described high temperature fluent metal battery body, low-temperature storage tank, steam generator, vapor wheel unit, generator and heat accumulation working medium; Heat accumulation working medium enters in high-temperature storage tank after being heated by solar energy heat trap, becomes cryogenic fluid and enter low-temperature storage tank after release heat energy, waits for and again being heated; The heat accumulation working medium of low temperature heats again by high temperature fluent metal battery body, becomes the heat accumulation working medium of high temperature; The heat energy that the heat accumulation working medium of high temperature stores for steam turbine power generating provides high temperature and high pressure steam, promotes vapor wheel unit and generator generating by steam generator, and generator is connected with electrical network.
The battery electrode being immersed in described heat accumulation working medium of described liquid metal cell increases insulation protection, prevents described battery short circuit or electric leakage.
The boiling point that described liquid metal cell adopts battery electrode metal is the liquid metal cell lower than the minimum operating temperature of described heat accumulation working medium higher than the Maximum operating temperature of described heat accumulation working medium and the fusing point of its battery electrode metal; Described high temperature fluent metal battery body is with sensible heat mode heat accumulation, and this battery body is equipped with the heat-exchanger rig that the heat energy of storage is inputed or outputed to this battery body.
Described heat accumulation working medium adopts liquid refrigerant or solid-state working medium.
Described grid-connected converter adopts voltage-source type current transformer.
Described grid-connected converter adopts the current transformer with realizing bidirectional electric energy flow, when at electrical network electric energy, unnecessary or electricity price is lower, be described high temperature fluent metal battery and the charging of low temperature liquid metal battery, the shortage of electrical network electric energy or electricity price when higher by the electric energy feedback of storing in described high temperature fluent metal battery to electrical network.
Liquid metal cell of the present utility model can be used for the storage of electric energy.The utility model is placed on liquid metal cell body group string the storage tank tank interior of heat reservoir later, also can be using the body of high temperature fluent metal battery that can sensible heat heat accumulation as heat accumulation working medium, be positioned in high temperature storage tank, and combining inverter and heat-exchanger rig are increased for this liquid metal cell, also can storage area heat energy when storage of electrical energy, jointly form heat energy-electric energy with storage power generation system with heat reservoir, save the independent installation cost of battery and heat accumulation working medium cost, can also increase more heat storage capacity.Heat reservoir of the present utility model can provide necessary high-temperature work environment for liquid metal cell; Electrical network electric energy takes liquid metal cell charging for being greater than, and liquid metal cell even can be used as heater element unnecessary electrical network electric energy energy transform into heat energy is stored, and regulates electrical network imbalance between supply and demand.The operating mode flexibility that the utility model while heat energy storage and electric energy have improved power generation system greatly, creates more operating modes, meets electrical network and power demands.
Brief description of the drawings
Fig. 1 is system architecture schematic diagram of the present utility model.
Fig. 2 is electric power storage system structural representation of the present utility model.
Fig. 3 is heat reservoir structural representation of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises electric power storage system and heat reservoir.
Electric power storage system comprises two liquid metal cells and grid-connected converter.The liquid metal cell being positioned in high-temperature storage tank 4 is high temperature fluent metal battery 5, and the liquid metal cell being positioned in low-temperature storage tank 2 is low temperature liquid metal battery 3.Two liquid metal cell series connection form battery pack, and the DC bus capacitor device C of this battery pack and grid-connected converter 9 is connected in parallel, and grid-connected converter 9 is connected with electrical network.
Heat reservoir comprises solar energy heat trap 1, high-temperature storage tank 4, low-temperature storage tank 2, steam generator 6, condenser 7, vapor wheel unit 8, generator 10 and heat accumulation working medium.
Solar energy heat trap 1, high-temperature storage tank 4, low-temperature storage tank 2 and steam generator 6 are in turn connected into one and are beneficial to the annular channels that heat accumulation Working cold-hot circulates; Low-temperature storage tank 2 also connects into another for the mobile path of heat accumulation working medium circulation by heat transfer pipe via the high temperature fluent metal battery body in high-temperature storage tank 4 and steam generator 6, this steam generator 6 is connected with generator 10 by vapor wheel unit 8, generator 10 is connected with electrical network, and condenser 7 is connected to from vapor wheel unit 8 and is back to the pipeline of steam generator.
Heat accumulation working medium enters in high-temperature storage tank after being heated by solar energy heat trap, becomes cryogenic fluid and enter low-temperature storage tank after release heat energy, waits for and again being heated; The heat accumulation working medium of low temperature heats again by high temperature fluent metal battery body, becomes the heat accumulation working medium of high temperature; The heat energy that the heat accumulation working medium of high temperature stores for steam turbine power generating provides high temperature and high pressure steam, promotes vapor wheel unit and generator generating by steam generator, and generator is connected with electrical network.
High temperature fluent metal battery of the present utility model can either store electrical energy, simultaneously can heat energy storage, therefore be called again electricity-heat energy with storage liquid metal cell.
Solar light-heat power-generation is to improve energy density by optical block, after heating heat transfer and heat accumulation working medium, completes the conversion of heat energy to electric energy by Turbo-generator Set.Solar light-heat power-generation can provide stable electric energy output, bears electrical network foundation load, is subject to electrical network and welcomes.In order to break through the restriction that can not generate electricity night, all integrated heat reservoirs of most solar light-heat power-generation systems, configuration mode mainly contains indirect heat accumulation and two kinds of direct heat accumulations.The working medium of heat reservoir is main mainly with fused salt, and heat accumulation principle has sensible heat and two kinds of modes of latent heat (phase transformation).
Liquid metal cell is a kind of novel electricity storage unit, and it is by two kinds of liquid metals as electrode, and electrolyte isolation positive and negative electrode is done with fused salt in centre, by selecting density difference and immiscible electrode metal and fused salt, three layers of inside battery self-assembling formations.The working principle of liquid metal cell is that the sedimentation potential of electrode metal does not wait at two interpolars and forms potential differences, and the low metal of sedimentation potential is as negative pole, and the high metal of sedimentation potential is as positive pole.Because the gibbs free energy of two kinds of electrode metals is unequal, negative pole metal forms ionization diffusion in charging, discharge process, between both positive and negative polarity, moves, and completes charge and discharge process.The advantage of liquid metal cell is can the low metal electrode material of alternative costs, reduces energy-storage system cost and operating cost, in have application advantage aspect extensive accumulate.During this is battery operated, its both positive and negative polarity and separation layer, all in high temperature fused state, must be equipped with heating, thermal environment condition.
As shown in Figure 2, electric power storage system of the present utility model comprises high temperature fluent metal battery, low temperature liquid metal battery, DC bus capacitor device, grid-connected converter and elastic cable paper.The positive pole of high temperature fluent metal battery is connected with the negative pole of low temperature liquid metal battery by elastic cable paper, its negative pole is connected with the positive pole of DC bus capacitor device by elastic cable paper, the positive pole of low temperature liquid metal battery is connected with the negative pole of DC bus capacitor device by elastic cable paper, and this DC bus capacitor device accesses electrical network by elastic cable paper via grid-connected converter.
The electric energy that liquid metal cell stores is controlled by grid-connected converter, there is two-way flow ability: when unnecessary or electricity price is lower at electrical network electric energy, electrical network can be high temperature fluent metal battery of the present utility model and the charging of low temperature liquid metal battery by this grid-connected converter; When the shortage of electrical network electric energy or electricity price are when higher, the utility model can be by the electric energy feedback in liquid metal cell to electrical network.
Liquid metal cell of the present utility model is placed on respectively in high temperature and low temperature heat accumulation fused salt tank, and is called high temperature fluent metal battery and low temperature liquid metal battery.When the electrode metal of two kinds of liquid metal cells of selection and electrolyte, must meet the following conditions: the boiling point of battery electrode metal is higher than the temperature of high temperature melting salt cellar, and its fusing point is lower than the temperature of low-temperature molten salt tank.
Grid-connected converter of the present utility model can be realized realizing bidirectional electric energy flow; High temperature fluent metal battery is except store electrical energy, and mode storage compartment heat energy that can also sensible heat uses as heater element, and electrical network electric energy is transformed into thermal energy storage; And a low temperature liquid metal battery store electrical energy.Heat accumulation fused salt can provide operation required temperature environment for liquid metal cell, has reduced the cost such as heat insulation, heating, installation of battery.Because heat accumulation fused salt is likely conductive material, therefore battery electrode is immersed in the insulation protection that part in heat accumulation fused salt tank must be in addition appropriate, prevents battery short circuit and electric leakage.
As shown in Figure 3, heat reservoir of the present utility model comprises solar energy heat trap, high temperature melting salt cellar, high temperature fluent metal battery body, low-temperature molten salt tank, steam generator, condenser, vapor wheel unit, generator and fused salt.High-temperature molten salt tank stores high-temperature molten salt.High temperature fluent metal battery is put into high temperature melting salt cellar, and low temperature liquid metal battery is put into low-temperature molten salt tank.High temperature fluent metal battery body has increased fused salt heat exchanging pipeline and heat exchanger, can carry out heat exchange with fused salt.
The output terminal of solar energy heat trap is connected with the input end of high temperature melting salt cellar by heat transfer pipe, the output terminal of high temperature melting salt cellar passes through heat transfer pipe and is connected with the high temperature input end of steam generator via a three-way valve, and the low temperature output terminal of this steam generator is connected with the input end of low-temperature molten salt tank by heat transfer pipe.Low-temperature molten salt tank has two output ports, one is connected with the input end of solar energy heat trap by heat transfer pipe, another input end by the heat transfer pipe on the battery body of heat transfer pipe and the high temperature fluent metal battery in high temperature melting salt cellar is connected, and this battery body also must be crossed via above-mentioned three-way valve and is also connected with the high temperature input end of steam generator by heat transfer pipe.Steam generator is connected with generator by vapor wheel unit, and generator is connected with electrical network, and condenser is connected to from vapor wheel unit and is back to the pipeline of steam generator.
In the fused salt circulation loop forming at the utility model, low-temperature molten salt has two kinds of approach realizations again to heat.Mode one, can heat again via solar energy heat trap; Mode two, can be via the heat transfer pipe that is arranged on high temperature fluent metal battery body this high-temperature body solution battery body of flowing through, become high-temperature molten salt by heat exchange, then flow out to the high temperature melting salt cellar at this high temperature fluent metal battery place, the high temperature input end via three-way valve to steam generator.
The operation material of heat energy storage of the present utility model is fused salt and high temperature fluent metal battery body.
When specific works, after heat energy release at the utility model in initial working state or heat reservoir storage, high temperature melting salt cellar is empty, and high temperature fluent metal battery body has also been reduced to its minimum operating temperature (more than the fusing point of battery electrode metal), and all fused salts all leave in low-temperature molten salt tank.
Under daytime sunshine condition, low-temperature molten salt, through the heating of solar energy heat trap, becomes high-temperature molten salt and is stored in high temperature melting salt cellar, and high-temperature molten salt is heated to the condition of high temperature (boiling point of battery electrode metal is following) high temperature fluent metal battery body simultaneously.In high-temperature molten salt heat accumulation process, also can produce steam simultaneously and promote the generating of vapor wheel unit.High-temperature heat-storage working medium heat accumulation process and the generating of vapor wheel unit can be carried out simultaneously.In order to make full use of heat storage capacity, before sunshine condition disappears, all fused salt has all been heated to the condition of high temperature and has stored.
Under night or peak of power consumption condition, the heat energy that heat reservoir stores starts to discharge and convert electric energy to through vapor wheel unit to be fed to electrical network.What first discharge is the heat energy that high-temperature molten salt stores, and high-temperature molten salt produces high temperature and high pressure steam by steam generator and promotes the running of vapor wheel unit, and after heat exchange, temperature of molten salt reduces simultaneously, becomes low-temperature molten salt and is back to low-temperature molten salt tank stores.When fused salt quantity in high temperature melting salt cellar drops to while approaching zero, the heat energy storing in high temperature fluent metal battery body does not discharge, and this battery keeps condition of high temperature.Again the part fused salt in low-temperature molten salt tank is pumped into the pipeline in battery body by pumping installations, control fused salt flow velocity and just can ensure that low-temperature molten salt can be heated to the condition of high temperature by battery body.Fused salt after heating can complete heat energy by above-mentioned same process and change to electric energy.
Under the long-term deficiency of illumination or other particular/special requirement conditions, fused salt heat accumulation efficiency will reduce greatly, now can utilize liquid metal cell as heater element, and electrical network electric energy conversion is become to heat energy, for low-temperature molten salt is heated into high-temperature molten salt, store more energy.
The utility model is heat energy storage and electric energy simultaneously, can improve greatly the flexibility of solar light-heat power-generation system operation, raises the efficiency and economic benefit.
Liquid metal cell energy storage function and heat storage function, can break away from the single mode of operation on " daytime heat accumulation, night generating ", makes the utility model can tackle more flexibly the electricity consumption occasion of electrical network peak of power consumption and low ebb.Daylight and electricity consumption are all peaks, and partial heat energy is used for generating electricity, liquid metal cell also can discharge the generated output that provides higher simultaneously simultaneously.Need for electricity decline in evening, illumination disappear, and heat energy, electric energy that high-temperature molten salt and liquid metal cell store generate electricity simultaneously, and maximum generated output is provided.Electrical network low power consumption, electricity price low ebb after the late into the night, liquid metal cell can utilize electrical network electric energy to charge, the utility model even can be using high temperature fluent metal battery as heater element, by the low price electric energy energy transform into heat energy of electrical network, low-temperature molten salt heating is become to high-temperature molten salt, when realizing electric energy, heat energy, store.
Electric power storage system of the present utility model can depart from solar-thermal generating system control, independently accepts dispatching of power netwoks and discharges and recharges operation; In the time that electrical network cannot receive the electric energy that described solar light-heat power-generation system sends, unnecessary electric energy is described liquid metal cell charging by grid-connected converter; When the electric energy sending when described solar light-heat power-generation system can not meet mains supply demand, the electric energy that described liquid metal cell stores is by combining inverter feed-in electrical network.
Heat reservoir of the present utility model can adopt sensible heat heat accumulation mode, latent heat (phase transformation) heat accumulation mode, single tank mesolimnion heat accumulation mode or solid-state working medium heat accumulation mode.Heat accumulation working medium can be liquid or solid-state, but heat accumulation working medium and liquid metal cell electrode have insulating medium.
The utlity model has operation control method flexibly, be not limited to solar light-heat power-generation system, any occasion of heat accumulation energy that mainly needs is such as UTILIZATION OF VESIDUAL HEAT IN, geothermal power generation etc. all can be used.
Claims (6)
1. a solar light-heat power-generation system, is characterized in that, comprises electric power storage system and heat reservoir;
Electric power storage system comprises two liquid metal cells and grid-connected converter, and two liquid metal cell series connection form battery pack, and the DC bus capacitor device of described battery pack and grid-connected converter is connected in parallel, and grid-connected converter is connected with electrical network;
The liquid metal cell being positioned in high-temperature storage tank is high temperature fluent metal battery, and the liquid metal cell being positioned in low-temperature storage tank is low temperature liquid metal battery;
Heat reservoir comprises solar energy heat trap, high-temperature storage tank, described high temperature fluent metal battery body, low-temperature storage tank, steam generator, vapor wheel unit, generator and heat accumulation working medium; Heat accumulation working medium enters in high-temperature storage tank after being heated by solar energy heat trap, becomes cryogenic fluid and enter low-temperature storage tank after release heat energy, waits for and again being heated; The heat accumulation working medium of low temperature heats again by high temperature fluent metal battery body, becomes the heat accumulation working medium of high temperature; The heat energy that the heat accumulation working medium of high temperature stores for steam turbine power generating provides high temperature and high pressure steam, promotes vapor wheel unit and generator generating by steam generator, and generator is connected with electrical network.
2. according to the solar light-heat power-generation system of claim 1, it is characterized in that, the battery electrode being immersed in described heat accumulation working medium of described liquid metal cell increases insulation protection, prevents described battery short circuit or electric leakage.
3. according to the solar light-heat power-generation system of claim 1, it is characterized in that, the boiling point that described liquid metal cell adopts battery electrode metal is the liquid metal cell lower than the minimum operating temperature of described heat accumulation working medium higher than the Maximum operating temperature of described heat accumulation working medium and the fusing point of its battery electrode metal; Described high temperature fluent metal battery body is with sensible heat mode heat accumulation, and this battery body is equipped with the heat-exchanger rig that the heat energy of storage is inputed or outputed to this battery body.
4. according to the solar light-heat power-generation system of claim 1, it is characterized in that, described heat accumulation working medium adopts liquid refrigerant or solid-state working medium.
5. according to the solar light-heat power-generation system of claim 1, it is characterized in that, described grid-connected converter adopts voltage-source type current transformer.
6. according to the solar light-heat power-generation system of claim 1, it is characterized in that, described grid-connected converter adopts the current transformer with realizing bidirectional electric energy flow, when at electrical network electric energy, unnecessary or electricity price is lower, be described high temperature fluent metal battery and the charging of low temperature liquid metal battery, the shortage of electrical network electric energy or electricity price when higher by the electric energy feedback of storing in described high temperature fluent metal battery to electrical network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420344850.9U CN203925901U (en) | 2014-06-26 | 2014-06-26 | Solar light-heat power-generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420344850.9U CN203925901U (en) | 2014-06-26 | 2014-06-26 | Solar light-heat power-generation system |
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| Publication Number | Publication Date |
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| CN203925901U true CN203925901U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420344850.9U Withdrawn - After Issue CN203925901U (en) | 2014-06-26 | 2014-06-26 | Solar light-heat power-generation system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047818A (en) * | 2014-06-26 | 2014-09-17 | 威胜集团有限公司 | Solar photo-thermal power generation system and energy storage method |
| CN109586415A (en) * | 2017-09-29 | 2019-04-05 | 神华集团有限责任公司 | The energy storage method and its system of renewable energy |
| CN117587423A (en) * | 2023-11-21 | 2024-02-23 | 中国科学院电工研究所 | Integrated solar energy-SOEC hydrogen production reactor based on liquid metal heat transfer |
-
2014
- 2014-06-26 CN CN201420344850.9U patent/CN203925901U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047818A (en) * | 2014-06-26 | 2014-09-17 | 威胜集团有限公司 | Solar photo-thermal power generation system and energy storage method |
| CN104047818B (en) * | 2014-06-26 | 2016-08-17 | 威胜集团有限公司 | Solar light-heat power-generation system and energy storage method |
| CN109586415A (en) * | 2017-09-29 | 2019-04-05 | 神华集团有限责任公司 | The energy storage method and its system of renewable energy |
| CN117587423A (en) * | 2023-11-21 | 2024-02-23 | 中国科学院电工研究所 | Integrated solar energy-SOEC hydrogen production reactor based on liquid metal heat transfer |
| CN117587423B (en) * | 2023-11-21 | 2024-06-07 | 中国科学院电工研究所 | Integrated solar energy-SOEC hydrogen production reactor based on liquid metal heat transfer |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141105 Effective date of abandoning: 20160817 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |