CN206071656U - A kind of deep cooling liquid air energy storage systems of air interstage cooling - Google Patents

A kind of deep cooling liquid air energy storage systems of air interstage cooling Download PDF

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Publication number
CN206071656U
CN206071656U CN201620601045.9U CN201620601045U CN206071656U CN 206071656 U CN206071656 U CN 206071656U CN 201620601045 U CN201620601045 U CN 201620601045U CN 206071656 U CN206071656 U CN 206071656U
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China
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air
energy
liquid air
unit
energy storage
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CN201620601045.9U
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Inventor
徐桂芝
赵波
杨岑玉
王乐
宋洁
金翼
邓占锋
胡晓
汤广福
宋鹏翔
李志远
梁立晓
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State Grid Corp of China SGCC
Global Energy Interconnection Research Institute
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State Grid Corp of China SGCC
Global Energy Interconnection Research Institute
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    • 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
    • Y02E60/16Mechanical energy storage, e.g. flywheels or pressurised fluids

Abstract

This utility model provides a kind of deep cooling liquid air energy storage systems of air interstage cooling, in conventional liquefaction flow path, air Jing compressors are at different levels to carry out interstage cooling, can so substantially reduce compressor power consumption, but when heat accumulation temperature is relatively low, it is less that expansion 7 unit mass of unit goes out work(;When heat accumulation temperature is higher, the intensity of air compressor unit 1 is limited, therefore, in liquefied air energy-storage system design process is carried out, air compressor unit 1, expansion unit 7 to consider, so as to be optimized design.By certain stage compressor to be set to only cool down uncompressed cooling compressor in the present embodiment, it is enable to reliably control the temperature and pressure situation of liquid air, so as to be favorably improved storage interior energy.

Description

A kind of deep cooling liquid air energy storage systems of air interstage cooling
Technical field
The present invention relates to the technical field of energy storage of cryogenic liquefying air, and in particular to the deep cooling liquid of air interstage cooling is empty Gas energy storage system.
Background technology
Cryogenic liquefying air energy storage technology refers to and electric energy is used for compressed air in the network load low ebb phase, by air high pressure It is sealed in abandoned well, the seabed air accumulator of sedimentation, cavern, expired Oil/gas Well or newly-built gas storage well, on network load peak The energy storage mode that phase release compressed air pushing turbine generates electricity, liquid air energy-storage system have that stored energy capacitance is larger, energy storage Cycle length, take up an area it is little the advantages of do not rely on geographical conditions.During energy storage, air is compressed, cools down and liquefy by electric energy, while storage The heat energy discharged during being somebody's turn to do, heats air during for releasing energy;When releasing energy, liquid air is pressurized, gasification, promotes expansion power generation Unit generation, while the cold energy of the process is stored, for cooling air during energy storage.
But also there is following defect in existing deep cooling liquid air energy storage systems:Cryogenic liquefying air energy storage systems are easily received To many factors such as environment, equipment and energy loss impact cause its circulation energy storage efficiency it is relatively low, operating cost compared with It is high, it is therefore necessary to which that a kind of high-effect, inexpensive deep cooling liquid air energy storage systems are provided.
The content of the invention
Therefore, during the technical problem to be solved in the present invention is the energy-storage system for overcoming cryogenic liquefying air in prior art The circulation energy storage efficiency of presence is relatively low, the higher technological deficiency of operating cost.
To solve above-mentioned technical problem, the present invention provides a kind of deep cooling liquid air energy storage systems of air interstage cooling, Including:
Air compressor unit, including some grades of air compressors, make the gaseous state of low-temp low-pressure air boil down to High Temperature High Pressure Air;
Air liquefying apparatus, is liquid air by the gaseous air liquefaction of the High Temperature High Pressure;
Heat-energy recovering apparatus, the heat energy to producing in air compression process are collected;
Liquid air storage tank, stores the liquid air of the High Temperature High Pressure;
Gasification installation, the gaseous air for making the liquid air of the High Temperature High Pressure gasify as High Temperature High Pressure, and receive described The heat energy stored in heat-energy recovering apparatus;
Cold energy retracting device, is collected for the cold energy produced during gaseous air to liquid air gasification, and will be cold During discharging to gaseous air boil down to liquid air;
Expansion unit, the gaseous air that the gasification of Jing liquid airs is obtained drive described swollen in the expansion unit Swollen unit is done manual work, and the gaseous air exported in the expansion unit reclaims input to the air compressor unit;
Several decompressors in the expansion unit are carried out Multi-stage heating by heater between level;
The air compressor unit includes heat exchanger between at least one grade, makes the gaseous state by heat exchanger between the level Air themperature declines.
In the deep cooling liquid air energy storage systems of above-mentioned air interstage cooling, between the level, heat exchanger is non-conterminous between level It is disposed adjacent.
In the deep cooling liquid air energy storage systems of above-mentioned air interstage cooling, the air compressor unit includes 5 grades of pressures Contracting machine, the wherein first order and afterbody are provided with heat exchanger between level.
In the deep cooling liquid air energy storage systems of above-mentioned air interstage cooling, the expansion unit is at least double expansion Unit, the wherein pressure value between each decompressor are identical or different.
In the deep cooling liquid air energy storage systems of above-mentioned air interstage cooling, the heat-energy recovering apparatus are at least one Individual heat storage can.
Technical solution of the present invention, has the advantage that:
1st, it is in the deep cooling liquid air energy storage systems of the air interstage cooling that the present invention is provided, in conventional liquefaction flow path, empty Gas Jing compressors are at different levels to carry out interstage cooling, can so substantially reduce compressor power consumption, but when heat accumulation temperature is relatively low, expansion It is less that 7 unit mass of unit goes out work(;When heat accumulation temperature is higher, the intensity of air compressor unit 1 is limited, therefore, carrying out liquid Change in air energy storage systems design process, air compressor unit 1, expansion unit 7 to consider, so as to be optimized design. By certain stage compressor to be set to only cool down uncompressed cooling compressor in the present embodiment, it is enable to reliably The temperature and pressure situation of control liquid air, so as to be favorably improved storage interior energy.
Description of the drawings
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to concrete Needed for embodiment or description of the prior art, accompanying drawing to be used is briefly described, it should be apparent that, in describing below Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid Put, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 illustrates for the principle in the deep cooling liquid air energy storage systems of the air interstage cooling in the embodiment of the present invention 1 Figure.
Description of reference numerals:
1- air compressor units;3- heat-energy recovering apparatus;4- liquid air storage tanks;5- gasification installations;6- cold energy reclaims dress Put;7- expands unit;Heat exchanger between 8- levels.
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described reality It is a part of embodiment of the invention to apply example, rather than the embodiment of whole.Based on the embodiment in the present invention, the common skill in this area The every other embodiment obtained under the premise of creative work is not made by art personnel, belongs to the model of present invention protection Enclose.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertical ", The orientation or position relationship of the instruction such as " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship, merely to Be easy to description the present invention and simplify description, rather than indicate or imply indication device or element must have specific orientation, With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ", " the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected;Can Being to be mechanically connected, or electrically connect;Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in invention.
As long as additionally, the non-structure each other of technical characteristic involved in invention described below different embodiments Can just be combined with each other into conflict.
Embodiment 1
The present embodiment provides a kind of deep cooling liquid air energy storage systems of air interstage cooling, below in conjunction with Fig. 1 to this reality The energy-storage system for applying example is described in detail, and which includes:
Air compressor unit 1, including some grades of air compressors, makes the gaseous state of low-temp low-pressure air boil down to High Temperature High Pressure Air;
Heat-energy recovering apparatus 3, the heat energy to producing in air compression process are collected;
Liquid air storage tank 4, stores the liquid air of the High Temperature High Pressure;
Gasification installation 5, the gaseous air for making the liquid air of the High Temperature High Pressure gasify as High Temperature High Pressure, and receive described The heat energy stored in heat-energy recovering apparatus 3;
Cold energy retracting device 6, is collected for the cold energy produced during gaseous air to liquid air gasification, and will be cold During discharging to gaseous air boil down to liquid air;
Expansion unit 7, it is described that the gaseous air that the gasification of Jing liquid airs is obtained enters driving in the expansion unit 7 Expansion unit 7 is done manual work, and the gaseous air exported in the expansion unit 7 reclaims input to the air compressor unit 1;
The air compressor unit 1 includes heat exchanger 8 between at least one grade, makes the gas by heat exchanger between the level State air themperature declines.
Above-mentioned embodiment is the core technology scheme of the present embodiment, and in conventional liquefaction flow path, air Jing compressors are at different levels Interstage cooling is carried out, compressor power consumption can be so substantially reduced, but when heat accumulation temperature is relatively low, expands 7 unit mass of unit Go out work(less;When heat accumulation temperature is higher, the intensity of air compressor unit 1 is limited, therefore, carrying out liquefied air energy-storage system In design process, air compressor unit 1, expansion unit 7 to consider, so as to be optimized design.Pass through in the present embodiment Certain stage compressor is set to only cool down uncompressed cooling compressor, is enable to reliably control liquid air Temperature and pressure situation, so as to be favorably improved storage interior energy.
As one kind preferred embodiment, between the level, heat exchanger 8 is non-conterminous between level being disposed adjacent.For example, this reality In applying example, air compressor unit can be that 5 grades of compressors, the wherein first order and compressor described in afterbody are cooling compressor. Can also be the second level and the fourth stage is cooling compressor;Can also the first order, the third level and level V compressor for cooling pressure Contracting machine.During with having more multi-compressor in compressor bank, those skilled in the art can as described above to cooling compression Machine position is specifically arranged.
In the deep cooling liquid air energy storage systems of the air interstage cooling of the present embodiment, energy input devices, i.e. motor, Which converts electrical energy into mechanical energy and drives the first air compression plant and the acting of the second air compression plant, wherein the first air Compressor is low pressure compressor;The compression of second air fills 4 for high pressure compressor.Specifically, the first air compression plant is to receiving Energy input devices drive gaseous air is carried out into one stage of compression, now through one stage of compression air still be gaseous state, then by Gas after one stage of compression carries out two-stage compression, the second air compression plant and liquefaction dress after air cleaner purification again Put and the air after purification be compressed into into liquid air in the environment of cryogenic high pressure, and liquid air is collected, store to In liquid air storage tank 4.While two-stage compression process is carried out, heat-energy recovering apparatus are to the warm that produces in two-stage compression process Storage can be collected.The mechanical energy consumed by energy input devices, converts for the interior energy of liquid air, this completes energy The storage process of amount.
The release process of energy is:
Liquid air is stored in liquefied air storage tank 4, and liquid air is exported to gasification installation 5 by equipment such as cyropumps In, the gasification installation 5 includes vaporizer etc..Gasification installation 5 can pressurize to liquid air, so as to promote liquid air to occur Gasification expansion, by the thermal energy exchange collected in thermal energy storage process to liquid air, so as to promote carrying for liquid air gasification rate Rise, and improve the enthalpy of gaseous air, improve the mechanical efficiency and dynamic responding speed of the gaseous air, in liquid air gas While change, cold energy retracting device 6 is collected to the cold energy produced by liquid air gasification, is collected in cold energy retracting device 6 To cold energy can be used in thermal energy storage process, in the first air compression plant and the second air compression plant.Further, liquid is empty After gas is gasificated into gaseous state, expansion 7 expansion work of unit can be driven, so as to complete exoergic process.
It should be noted that in practical work process, liquid air is to complete gasification, example by multiple expansion process Such as, the expansion unit 7 used in the present embodiment can also be as the one kind in steam turbine, gas turbine or Stirling-electric hybrid or appoint Two or three of meaning.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.It is right For those of ordinary skill in the art, can also make on the basis of the above description other multi-forms change or Change.There is no need to be exhaustive to all of embodiment.And thus it is extended obvious change or Among changing still in the protection domain of the invention.

Claims (5)

1. deep cooling liquid air energy storage systems of a kind of air interstage cooling, including:
Air compressor unit (1), including some grades of air compressors, makes the gaseous state of low-temp low-pressure air boil down to High Temperature High Pressure empty Gas;
Air liquefying apparatus (2), is liquid air by the gaseous air liquefaction of the High Temperature High Pressure;
Heat-energy recovering apparatus (3), the heat energy to producing in air compression process are collected;
Liquid air storage tank (4), stores the liquid air of the High Temperature High Pressure;
Gasification installation (5), the gaseous air for making the liquid air of the High Temperature High Pressure gasify as High Temperature High Pressure, and receive the heat Can the middle heat energy for storing of retracting device (3);
Cold energy retracting device (6), is collected for the cold energy produced during gaseous air to liquid air gasification, and by cold energy During discharging to gaseous air boil down to liquid air;
Expansion unit (7), the gaseous air that the gasification of Jing liquid airs is obtained drive described in expansion unit (7) Expansion unit (7) is done manual work, and in expansion unit (7), the gaseous air of output reclaims input to the air compressor unit (1);
Several decompressors in expansion unit (7) are carried out Multi-stage heating by heater between level;
It is characterized in that:
The air compressor unit (1) includes heat exchanger (8) between at least one grade, makes the gas by heat exchanger between the level State air themperature declines.
2. deep cooling liquid air energy storage systems of air interstage cooling according to claim 1, it is characterised in that:
Between the level, heat exchanger (8) is disposed adjacent for non-conterminous between level.
3. deep cooling liquid air energy storage systems of air interstage cooling according to claim 2, it is characterised in that:
The air compressor unit (1) includes 5 grades of compressors, and the wherein first order and afterbody is provided with heat exchanger between level (8).
4. deep cooling liquid air energy storage systems of air interstage cooling according to claim 3, it is characterised in that:
Expansion unit (7) is at least double expansion unit, and the wherein pressure value between each decompressor is identical or different.
5. deep cooling liquid air energy storage systems of air interstage cooling according to claim 1, it is characterised in that:
The heat-energy recovering apparatus (3) are at least one heat storage can.
CN201620601045.9U 2016-06-17 2016-06-17 A kind of deep cooling liquid air energy storage systems of air interstage cooling Active CN206071656U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620601045.9U CN206071656U (en) 2016-06-17 2016-06-17 A kind of deep cooling liquid air energy storage systems of air interstage cooling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620601045.9U CN206071656U (en) 2016-06-17 2016-06-17 A kind of deep cooling liquid air energy storage systems of air interstage cooling

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Address after: 102209 Beijing City, the future of science and Technology City Binhe Road, No. 18, No.

Co-patentee after: State Grid Corporation of China

Patentee after: Global energy Internet Institute, Inc.

Address before: 102211 Beiqijia Town, Beijing, Changping District, future technology North Zone National Grid hospital

Co-patentee before: State Grid Corporation of China

Patentee before: GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE

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