CN102758689A - Ultra-supercritical air energy storage/release system - Google Patents
Ultra-supercritical air energy storage/release system Download PDFInfo
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- 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
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Abstract
The invention discloses an ultra-supercritical air energy storage/release system, which is a novel large-scale energy storage system and relates to an energy storage technology, namely, air is compressed into an ultra-supercritical state by using off-peak electricity of a power station, heat is compression is stored simultaneously, air is cooled by using an expansion engine and simultaneously expansion work is recovered to improve the efficiency, and the ultra-supercritical air is cooled, liquefied and stored by using stored cold energy; and liquid air is pressurized and absorbs heat to reach an ultra-supercritical state at the power utilization peak and further absorb heat of compression for power generation by a turbo-generator. The ultra-supercritical air energy storage/release system disclosed by the invention has the advantages of high energy density, high efficiency, no limitation by energy storage cycle and geological conditions, suitability for various power stations, environmental friendliness, capability of recovering intermediate-temperature and low-temperature waste heat and the like.
Description
Technical field
The present invention relates to the energy storage technical field, particularly a kind of extensive air energy storage based on the ultra supercritical process/releasing can system.
Background technique
The electric power energy storage technology is the important means of adjusting the electrical network peak valley at present, improving electric power system Economy and stability; Being one of most important bottleneck that restriction is unstable, step renewable energy sources is utilized on a large scale, also is the key technology of distributed energy and intelligent grid.At present existing electric power energy storage technology comprises pumped storage power station, pressurized air, storage battery, superconduction magnetic energy, flywheel and electric capacity etc.But owing to reasons such as capacity, energy storage cycle, energy density, efficiency for charge-discharge, life-span, operating cost, environmental protection, only draw water two kinds of power station and the pressurized air that in the large scale business system, have moved at present.
Conventional compression air energy-storage system is based on a kind of energy-storage system of gas turbine technology exploitation.At low power consumption, air pressure contractd to be stored in the gas storage chamber, and making electric energy be converted into the interior of air can store; In peak of power consumption, high-pressure air discharges from gas storage chamber, gets into gas-turbine combustion chamber and burns together with fuel, drives turbine power generation then.Compressed-air energy-storage system has that stored energy capacitance is big, the energy storage cycle is long, efficient is high (50%～70%) and advantage such as specific investment cost is less relatively; But conventional compression air energy-storage system is not an independently technology, and it must be with the supporting use of turbine power plant; Can not be fit to other types; Like power stations such as coal fired power plant, nuclear power station, wind energy and solar energy, being not suitable for China especially is main with coal fired power generation, does not advocate the energy strategy of gas fuel generating.And; Compressed-air energy-storage system still relies on combustion of fossil fuels thermal source is provided; Face on the one hand the fossil fuel threat with rise in price of petering out; Its burning still produces pollutants such as nitride, sulphide and carbon dioxide on the other hand, does not meet green (zero-emission), reproducible energy development requirement.More fatal is, because energy storage density is low, compressed-air energy-storage system also needs specific geographical condition to build large-scale gas storage chamber, like rock cavity, Yan Dong, abandoned mine etc., thereby big limitations the application area of compressed-air energy-storage system.
For solving the subject matter that conventional compression air energy-storage system faces; Particularly to the dependence problem of gas turbine; Chinese scholars was carried out ground compressed-air energy-storage system (SVCAES) respectively, was taken back hot compressed-air energy-storage system (AACAES), air vapor combined cycle compressed-air energy-storage system (CASH) etc. recent years, made compressed-air energy-storage system can break away from the combustion of fossil fuel thermal source basically.But owing to do not adopt the fossil fuel thermal source; The energy density of compressed-air energy-storage system is lower, has highlighted more large-scale gas storage chamber is relied on, and efficient is also not high enough simultaneously; Must find rational solution, the air energy-storage system is obtained more extensively and effectively utilize.
In recent years, Chinese scholars has developed the supercritical air energy-storage system, and it utilizes the character under the super critical condition of air, solves the major technique bottleneck that the energy storage of conventional compression air exists.The problem that but the supercritical air energy-storage system still exists, and working pressure is not high, the big occupation of land of reservoir vessel volume is many; And supercritical air is bigger through the irreversible loss of throttle valve liquefaction; System flow is reasonable inadequately; Energy utilizes insufficient, causes system effectiveness lower (approximately having only about 65%).
The present invention proposes a kind of ultra supercritical air energy storage/release can system, further promotes the performance of supercritical air energy-storage system.
Summary of the invention
The objective of the invention is to disclose a kind of ultra supercritical air energy storage/release can system; It is the novel air energy-storage system; Utilize the character and the system flow innovation of air under the ultra supercritical state, promote supercritical air energy-storage system performance, be suitable for the supporting use of all kinds power station and electrical network energy storage.Under the ultra supercritical condition, air density can reach more than 820 times of normal gaseous state, significantly reduces flask volume.After using the combination of decompressor or decompressor and throttle valve, can effectively utilize the pressure ability of gas, realize the comprehensive cascade utilization of HQ high grade energy, help improving system's liquefied fraction simultaneously, reduce extraneous cold magnitude of recruitment, thereby obviously improve system effectiveness.
For achieving the above object, technical solution of the present invention is:
Ultra supercritical air energy storage/release and system to comprise compressor bank, accumulation of heat/heat exchanger, cold-storage/heat exchanger, decompressor, low-temperature storage tank, valve, cryopump, turbines, generator, driver element and many pipelines.The remarkable difference of it and overcritical compressed-air energy-storage system is that parameter is higher,, the combination with decompressor or decompressor and throttle valve simultaneously replaces throttle valve, and the energy density of system and efficient are increased dramatically.
Compressor bank of the present invention comprises at least two low pressure compressors, at least one high pressure compressor; Connect each other or be integrated into whole multistage compressor, each low pressure compressor inlet connects air source, and at least one decompressor of compression system series connection is to reduce gas temperature; Improve system effectiveness; The outlet of decompressor inserts throttle valve lowers the temperature a little and can realize liquefaction, and decompressor can be piston type, centrifugal, axial flow and combined type, and the type of decompressor and platform are counted the viewing system parameter and decided; Decompressor and compressor can be designed to coaxial combination, and also can connect through gearbox provides compression power, thereby improves system effectiveness and Economy.System layout is following:
Low pressure compressor links to each other with accumulation of heat/heat exchanger respectively through pipeline through pipeline, high pressure compressor; High-pressure air after the store compressed heat gets into through pipeline and gets into low-temperature storage tank through pipeline after cold-storage heat-exchanger cooling back gets into the further decrease temperature and pressure liquefaction of decompressor, in pipeline, is provided with valve, at least one cryopump, and valve is positioned at the cryopump upper reaches; Cold-storage/heat exchanger bottom is provided with deslagging pipeline and exhaust line; Accumulation of heat/heat exchanger interlinks with high-pressure turbine, low-pressure turbine respectively through pipeline.
Its workflow is: during energy storage, utilize drive unit drives combined type compressor bank, air in certain amount is compressed to the ultra supercritical state, every grade the heat of compression is recovered and is stored in accumulation of heat/heat exchanger; The ultra supercritical air of certain parameter gets in cold-storage/heat exchanger and cools off then, changes liquid air into through expansion unit expansion decrease temperature and pressure again and gets into the low-temperature storage tank storage, and partly the air of liquefaction is discharged after getting into cold-storage heat-exchanger through pipeline; When releasing ability; Cryopump liquid towards air pressurized is to ultra supercritical pressure; The high-pressure liquid air is warming up to the ultra supercritical state and reclaims cold energy in cold-storage/heat exchanger; In accumulation of heat/heat exchanger, absorb the heat of compression ultra supercritical air is further heated up, get into the turbines expansion acting that high pressure turbine and low-pressure turbine are formed then, drive generator for electricity generation.
Described ultra supercritical air energy storage/release can system, and its said driver element is to be the motor of power supply drive with wherein one or more of electrical network or conventional power plant low ebb electricity, nuclear power, wind-powered electricity generation, solar electrical energy generation, biomass power generation, water power or tidal power generation.
Described ultra supercritical air energy storage/release can system, and its thermal energy storage process is rationed the power supply or the quality of power supply is launched when not meeting internet access request in electric power low ebb, renewable energy sources; Exoergic process is launched when peak of power consumption, electric power accident, renewable energy power generation fluctuation.
Described ultra supercritical air energy storage/release the ability system, its compression process comprises at least one decompressor, is used to make the pressurized air decrease temperature and pressure to be convenient to liquefaction and recovery expansion work, improves system effectiveness.
Described ultra supercritical air energy storage/release the ability system, its said accumulation of heat/heat exchanger also is provided with pipeline, and this pipeline and extraneous thermal source interlink, and extraneous thermal source can be solar thermal collector, industrial exhaust heat and all kinds of used heat.Said waste heat, used heat are waste heat, the used heat of power plant, cement industry, iron and steel metallurgical industry, chemical industry; Waste heat, used heat can be stored in accumulation of heat/heat exchanger, also can be stored in special-purpose accumulation of heat/heat exchanger.
Described ultra supercritical air energy storage/release the ability system also comprises air purification and purifying in its air compression, the cooling procedure, remove airborne solid matter and foreign gas; Air purification and purifier apparatus are integrated in compressor bank and the cold-storage/heat exchanger, not expression separately.
Described ultra supercritical air energy storage/release can system, its said compressor bank; When being multiple compressors, multiple compressors is coaxial series connection form or split axle parallel form; In the parallel form, each split axle and main driving axle are dynamically connected; The exhaust of each stage compressor all cools through accumulation of heat/heat exchanger.
Described ultra supercritical air energy storage/release the ability system, its said turbines, overall expansion ratio are between 50～420, and the final stage gas turbine exhaust is near normal pressure; When being many turbo machines, many turbo machines are coaxial series connection form or split axle parallel form; In the parallel form, each split axle and main driving axle are dynamically connected; Accumulation of heat/heat exchanger heat temperature raising is all passed through in the air inlet of each stage turbine earlier.
Described ultra supercritical air energy storage/release can system, and its said compressor can be piston type, centrifugal, axial flow, screw type or combined type; Its said decompressor and turbo machine can be piston type, axial flow, radial inflow, screw type or hybrid.
Described ultra supercritical air energy storage/release can system, and it is said when multiple compressors, many decompressors/turbo machine, and multiple compressors, many decompressor/turbo machines are distributed on a live axle or the many live axles, connect through gearbox.
Described ultra supercritical air energy storage/release the ability system, the flow of its control air is air stream quantitative limitation by compression not.
Described ultra supercritical air energy storage/release can system, the accumulation of heat form of its said accumulation of heat/heat exchanger be sensible heat, latent heat or chemical reaction pine for one or more; The heat storage medium that adopts is water, paraffin, bio-oil, mineral-type crystalline hydrate salt, fuse salt, metal and alloy thereof, organic type of fatty acid, stone, rock or concrete, and heat storage medium is stored in the thermally insulated container;
Wherein, accumulation of heat/heat exchanger during energy storage, reclaims and stores the heat of compression of compressor generation, and when releasing ability, the pressurized air before the decompressors at different levels is advanced in heating; Release can the time also can be input into waste heat through pipeline, used heat is accumulation of heat/heat exchanger additional heat.
Described ultra supercritical air energy storage/release the ability system, its said cold-storage/heat exchanger to 81K-150K (K is a Kelvin temperature unit), is a kind of or combination in sensible heat cold-storage or the solid-liquid phase change cold-storage with the ultra supercritical air cooling; The sensible heat cool storage medium that adopts is in sealing ice hockey, sandstone, concrete, aluminium strip dish or other metallics one or more; The solid-liquid phase change cool storage medium is ammonia and the aqueous solution, salts solution, alkanes, olefines material and the compound thereof of solid-liquid phase change temperature between 81K～273K, and one or more in the alcohols and the aqueous solution thereof, cool storage medium are stored in the thermally insulated container; Ultra supercritical air or liquid air in cold-storage/heat exchanger with direct contact heat-exchanging of cool storage medium or non-direct contact heat-exchanging; During energy storage, cold-storage/heat exchanger further cools off the ultra supercritical air is convenient to liquefaction, and when releasing ability, cold-storage/heat exchanger reclaims the cold that also stores in the high-pressure liquid atmosphere temperature rising process.
Described ultra supercritical air energy storage/release can system, and its said cold-storage/heat exchanger when the low temperature cold is not enough, adds throttling arrangement and makes that near the air of liquefaction point be that liquefiable gets into storage tank after the decrease temperature and pressure a little.Throttling arrangement also might be cancelled.
Described ultra supercritical air energy storage/release the ability system, its said low-temperature storage tank is Dewar storage tank or low temperature storage tank, liquid air stores under normal pressure or band pressure condition.
Described ultra supercritical air energy storage/release the ability system, its said cryopump, centrifugal or hybrid for reciprocating type, liquid air is pressurized to 5.0MPa～42MPa; In the time of many, be plural serial stage or parallel connection.
Described ultra supercritical air energy storage/release the ability system during its energy storage, is regulated energy storage capacity through control first order compressor air inflow.Described ultra supercritical air energy storage/release the ability system, its said control first order compressor air inflow is through regulating compressor load, valve opening, driving rotating speed, start-stop part compressor or regulating the control that pressure ratio realizes air inflow.When it releases ability, regulate generating capacity through control liquid air amount of vaporization.
The invention has the advantages that: energy storage efficiency improves more than 30% than 4～7 percentage points of supercritical air system's raisings, energy storage density than supercritical air system.Simultaneously the energy storage cycle unrestricted, be applicable to all kinds power station, environmentally friendly, recyclable used heat, do not need big storage device, improved soil and resource utilization, have wide use prospect.
Description of drawings
Fig. 1 is that ultra supercritical air of the present invention energy storage/release can system embodiment 1 structural representation;
Fig. 2 is that ultra supercritical air of the present invention energy storage/releasing can system embodiment 2 structural representation.
Embodiment
For making the object of the invention, technological scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, to further explain of the present invention.
Ultra supercritical air of the present invention energy storage/release can system; Adopt power station low ebb (at a low price) electric energy with air compression to ultra supercritical state (store compressed heat simultaneously); Utilize decompressor to make the air cooling-down step-down reclaim expansion work simultaneously then and raise the efficiency, and utilize the cold energy of having stored pressurized air cooling, liquefaction and storage (energy storage); In peak of power consumption; The liquid air pressurization is absorbed heat to ultra supercritical state (cold energy in the liquid air is recovered storage simultaneously); And driving generator for electricity generation (releasing ability) through turbines after further absorbing the heat of compression of storing, some industrial waste heats can be recovered to improve system effectiveness in this process.The ultra supercritical air energy-storage system that the present invention proposes has the high outstanding advantage of energy storage efficiency; Owing to adopt to optimize flow process and high parameter more; The comparable supercritical air energy-storage system of system effectiveness is higher; Preresearch estimates can reach more than 70%, advantages such as that energy storage density improves is about 30%～50%, the energy storage cycle is unrestricted, storage device significantly reduces, be suitable for all kinds power station, environmentally friendly, recyclable various industrial waste heats.
Embodiment:
Fig. 1 is that ultra supercritical air of the present invention energy storage/releasing can system embodiment 1.Comprise low pressure compressor 1,3, accumulation of heat/heat exchanger 2, high pressure compressor 35,38, decompressor 40 (one-level at least), cold-storage/heat exchanger 4; Low-temperature storage tank 6, valve 7, cryopump 8; High- pressure turbine 9,10, low- pressure turbine 43,46, generator 11; Drive motor 12, pipeline 13,14,15,16,17,18,19,20,21,22,23,24,30,31,34,36,37,39,41,42,44,45 etc., and air A.
Accumulation of heat/heat exchanger 2 interlinks through pipeline 23 and extraneous thermal source.Cold-storage/heat exchanger 4 bottoms are provided with deslagging pipeline 24.
During energy storage; Low ebb (at a low price) electric energy drive motor 12 drives compressor bank, cleaned air passes A get into compressor bank compress step by step, through accumulation of heat/heat exchanger 2 and heat storage medium heat exchange store compressed heat, cools off in the middle of realizing; Be compressed into the ultra supercritical state until getting into high pressure compressor 38; Through pipeline 39 the ultra supercritical air is transported to accumulation of heat/heat exchanger 2 store compressed heat again, the ultra supercritical air that is cooled to uniform temperature gets into cold-storage/heat exchanger 4 and further is cooled to lower temperature by cool storage medium, gets into cryogenic expansion machine 40 (one-level at least) expansion acting; Liquefy after the decrease temperature and pressure, liquid air is stored in the low-temperature storage tank 6 through pipeline 30.When releasing ability; Open valve 7, cryopump 8 will be pressurized to ultra supercritical pressure from the liquid air of low-temperature storage tank 6 after, be delivered to cold-storage/heat exchanger 4 and cool storage medium heat exchange and gasification by pipeline 18; Reclaim cold simultaneously; The ultra supercritical air that goes out cold-storage/heat exchanger 4 gets into accumulation of heat/heat exchanger 2 via pipeline 19 again and further heats up, and the ultra supercritical air after temperature raises injects high-pressure turbine unit expansion acting through pipeline, and the turbine outlet air continues to get into the 2 heat absorption intensifications of accumulation of heat/heat exchanger and gets into the acting of next stage turbine expansion; Until acting finishes through the final stage turbine, lack gas row to atmosphere.Turbines drives generator 11 generatings.
Operation when generally speaking, energy storage is different with exoergic process.During energy storage, compressor bank and decompressor work, turbine generation unit, cryopump 8 are closed down, valve 7 is closed, accumulation of heat/heat exchanger 2 reclaims, stores the heat of compression, cooling work gas simultaneously, cold-storage/heat exchanger 4 released cold quantities, with the ultra supercritical air cooling to low temperature.Then opposite when releasing ability; Compressor bank and decompressor are closed down, turbines, cryopump 8 work, and valve 7 is opened; Cold-storage/heat exchanger 4 reclaims, stores cold; The high-pressure liquid atmosphere temperature rising is to the ultra supercritical state simultaneously, and 2 on accumulation of heat/heat exchanger discharges the heat of compression, further promotes the ultra supercritical air temperature.In addition, external heats such as solar energy, waste heat, used heat then can be at any time get into accumulation of heat/heat exchangers 2 via pipeline 23 and store, and also can be stored in one independently (not drawing among the figure) in accumulation of heat/heat exchanger; The ultra supercritical air gets into 4 coolings of cold-storage/heat exchanger, and isolated impurity and pollutant can be discharged through pipeline 24 in this process.
Fig. 2 is that ultra supercritical air of the present invention energy storage/releasing can system embodiment 2.Its structure is basic identical with embodiment 1, but behind cryogenic expansion machine, increases throttle valve 48.Through cold-storage heat-exchanger 4 cooled ultra supercritical air, after decompressor 40 actings and decrease temperature and pressure, get into and further liquefy through throttle valve 48.Other workflows are similar with embodiment 1.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of the present invention.
Claims (10)
1. ultra supercritical air energy storage/release can system; Comprise compressor bank (1,3,35,38), accumulation of heat/heat exchanger (2), cold-storage/heat exchanger (4), low-temperature storage tank (6), valve (7), cryopump (8), turbines (9,10,43,46), generator (11), driver element (12), it is characterized in that:
Said system also comprises expansion unit (40); Said compressor bank (1,3,35,38) with air compression to ultra supercritical state after; Combination through said expansion unit (40) or expansion unit (40) and throttle valve (48) is depressurized to liquid state with the ultra supercritical air cooling-down, and liquid air is stored in the said low-temperature storage tank (6); The direct coaxial combination of at least one compressor in said expansion unit (40) and the compressor bank (1,3,35,38), or connect through gearbox power is provided;
Said system comprises the energy storage subtense angle and releases the ability subtense angle: in the said energy storage subtense angle, said driver element (12), compressor bank (1,3,35,38), accumulation of heat/heat exchanger (2), cold-storage/heat exchanger (4), expansion unit (40), low-temperature storage tank (6) are through a pipeline group (13,14,15,34,36,37,39,16,30) order UNICOM successively; Said releasing in the ability subtense angle, said low-temperature storage tank (6), valve (7), cryopump (8), cold-storage/heat exchanger (4), accumulation of heat/heat exchanger (2), turbines (9,10,43,46), generator (11) are through another pipeline group (31,18,19,20,21,22,41,42,44,45) order UNICOM successively;
Said compressor bank (1,3,35,38) comprises at least one low pressure compressor (1), at least one high pressure compressor (35); Connect each other or be integrated into whole multistage compression unit; Wherein the suction port of first order compressor (1) connects air source; And in each stage compressor; The air outlet of upper level compressor links to each other with the suction port of next stage compressor after pipeline passes said accumulation of heat/heat exchanger (2), the air outlet of afterbody high pressure compressor (38) after pipeline (39,16) passes said accumulation of heat/heat exchanger (2) and cold-storage/heat exchanger (4) with the suction port UNICOM of said expansion unit (40);
Said turbines (9,10,43,46) comprises at least one low-pressure turbine (46), at least one high pressure turbine (10); Connect each other or be integrated into whole multistage turbine unit; Liquid air in the said low-temperature storage tank (6) feeds in the first order through pipeline changes the air of ultra supercritical state successively into through valve (7), cryopump (8), cold-storage/heat exchanger (4), accumulation of heat/heat exchanger (2) after; In each stage turbine; The air outlet of upper level turbo machine is connected with the suction port of next stage turbo machine after pipeline passes said accumulation of heat/heat exchanger (2) successively, and the air outlet of afterbody low-pressure turbine (46) leads to atmosphere.
2. ultra supercritical air according to claim 1 energy storage/release the ability system, it is characterized in that: said driver element (12) is affixed with the transmission shaft of compressor bank (1,3,35,38); Said expansion unit (40) can directly drive said compressor bank (1,3,35,38) or pass through another generator connecting in parallel with system through gearbox; Said generator (11) is affixed with the transmission shaft of turbines (9,10,43,46).
3. require the described ultra supercritical air energy storage/release can system according to aforesaid right, it is characterized in that: said low-temperature storage tank (6) be Dewar storage tank or low temperature storage tank, and liquid air is at normal pressure or be with under the certain pressure situation and store.
4. require the described ultra supercritical air energy storage/release can system according to aforesaid right; It is characterized in that: said accumulation of heat/heat exchanger (2) is a heat-insulating container; Heat storage medium is stored in the container; The ultra supercritical air therein with direct contact heat-exchanging of heat storage medium or non-direct contact heat-exchanging, heat storage type is a kind of in sensible heat, the latent-heat storage or combination; During energy storage, accumulation of heat/heat exchanger (2) reclaims and stores the heat of compression that compressor produces, and when releasing ability, the pressurized air before each stage turbine is advanced in heating.
5. require the described ultra supercritical air energy storage/release can system according to aforesaid right; It is characterized in that: said cold-storage/heat exchanger (4) is a heat-insulating container; Cool storage medium is stored in the container; Ultra supercritical air or liquid air therein with direct contact heat-exchanging of cool storage medium or non-direct contact heat-exchanging, its cold-storage form is a kind of in sensible heat cold-storage or the solid-liquid phase change cold-storage or combination; During energy storage, cold-storage/heat exchanger (4) is cooled to 81K-150K with supercritical air, when releasing ability, reclaims and also stores the cold that discharges in the high-pressure liquid atmosphere temperature rising process; Cold-storage/heat exchanger (4) bottom is provided with deslagging pipeline (24).
6. require the described ultra supercritical air energy storage/release can system according to aforesaid right; It is characterized in that; Its workflow is: during energy storage; Utilize driver element (12) drive compression unit (1,3,35,38), air in certain amount is compressed to the ultra supercritical state, the heat of compression is recovered and is stored in accumulation of heat/heat exchanger (2); The ultra supercritical air gets in cold-storage/heat exchanger (4) and gets into expansion unit (40) decrease temperature and pressure again and reclaim expansion work after the cooling; Low temperature pressurized air through the combination of expansion unit (40) or expansion unit (40) and throttle valve (48) after fully or overwhelming majority liquefaction, liquid air gets into low-temperature storage tank (6) storage; When releasing ability; Cryopump (8) liquid towards air pressurized is to ultra supercritical pressure; The high-pressure liquid air is warming up to the ultra supercritical state and reclaims cold energy in cold-storage/heat exchanger (4); In accumulation of heat/heat exchanger (2), absorb the heat of compression ultra supercritical air is further heated up, get into turbines (9,10,43,46) expansion acting then, drive generator (11) generating.
7. require the described ultra supercritical air energy storage/release can system according to aforesaid right, it is characterized in that: said expansion unit (40) comprises at least one decompressor, is used to make the pressurized air decrease temperature and pressure to be convenient to liquefaction and reclaims expansion work, improves system effectiveness.
8. require the described ultra supercritical air energy storage/release can system according to aforesaid right, it is characterized in that: when said compressor bank (1,3,35,38) during for multiple compressors, multiple compressors be coaxial series connection form or split axle parallel form; In the parallel form, each split axle and main driving axle are dynamically connected; Accumulation of heat/heat exchanger (2) is all passed through in the exhaust of each stage compressor.
9. require the described ultra supercritical air energy storage/release can system according to aforesaid right, it is characterized in that: said turbines (9,10,43,46), the final stage gas turbine exhaust is near normal pressure; When being many turbo machines, many turbo machines are coaxial series connection form or split axle parallel form; In the parallel form, each split axle and main driving axle are dynamically connected; Accumulation of heat/heat exchanger (2) heat temperature raising is all passed through in the air inlet of each stage turbine earlier.
10. require the described ultra supercritical air energy storage/release can system according to aforesaid right, it is characterized in that: said cryopump be reciprocating type, centrifugal or hybrid, and liquid air is pressurized to 5.0MPa～42MPa; In the time of many, be plural serial stage or parallel connection.
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