CN106437885B - A kind of compressed-air energy-storage system - Google Patents
A kind of compressed-air energy-storage system Download PDFInfo
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- CN106437885B CN106437885B CN201611076069.8A CN201611076069A CN106437885B CN 106437885 B CN106437885 B CN 106437885B CN 201611076069 A CN201611076069 A CN 201611076069A CN 106437885 B CN106437885 B CN 106437885B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 51
- 238000007906 compression Methods 0.000 claims abstract description 45
- 230000006835 compression Effects 0.000 claims abstract description 42
- 238000003860 storage Methods 0.000 claims abstract description 26
- 238000009825 accumulation Methods 0.000 claims description 31
- 239000000203 mixture Substances 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000008859 change Effects 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 118
- 238000010586 diagram Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 7
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/14—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having both steam accumulator and heater, e.g. superheating accumulator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/02—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of multiple-expansion type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/06—Combinations of two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Compressed-air energy-storage system provided by the invention, including compression unit, expansion cell, gas storage unit, thermal storage unit, heat exchange unit and electric energy unit, the compression unit includes low-pressure stage compressor set and high pressure stage compressor group, the expansion cell includes low-pressure stage expansion unit and hiigh pressure stage expansion unit, the compression unit and expansion cell that the present invention uses are fabricated structure, using two same model compressors or expanding machine rotated in opposite directions with rotation axis to be a set of, one or more sets parallel machine operations are level-one, the operation of the units connected in series of two-stage and the above together constitutes whole compression unit and expansion cell, so on the one hand be conducive to adapt to the energy storage demand of various ranks, on the other hand it is suitable for the cycle of operation of different length, in addition, be conducive to offset axial force, improve the stability of whole system.
Description
Technical field
The present invention relates to electric power technical field of memory, particularly a kind of compressed-air energy-storage system.
Background technology
In recent years, China's tradition power grid peak valley difference value increasingly increases, its reason mainly has two：First, more and more
Large-scale intermittent electricity consumption unit is connected to the grid；Second, got over wind-powered electricity generation, photoelectricity etc. for the intermittent renewable energy generated energy of representative
Come bigger.These intermittent electric users and being incorporated to for power supply are considerably increased based on the peak-valley difference of traditional power grid of coal electricity
Value, some areas even have to solve the problems, such as this by way of power cuts to limit consumption.Thus the energy of getting worse is brought
Source wastes, and increasingly influences daily life or even production work.In order to ensure power grid security, economically run,
It is imperative to configure electric energy storing system.
Current electric energy storing system species is various, can be divided mainly into following three classes：Mechanical energy storage (energy storage of drawing water, compression
Air energy storage, flywheel energy storage etc.), Power Flow (ultracapacitor etc.) and electrochemical energy storage (lead-acid battery, lithium ion battery,
Sodium-sulphur battery etc.).Only draw water energy storage and the compressed-air energy storage of more than 100MW can wherein be reached in energy storage scale, therefore
This two power energy storage technologies are instantly most promising.But all kinds of corrupt practices creep in for the energy storage technology that draws water, therefore compressed air is stored up
Energy technology is particularly important.
But the country is still in theoretical research stage in compressed air energy storage technology field；From the point of view of in world wide,
It is entirely compensation combustion type, i.e., through there is some set compressed air energy-accumulating power stations to put into operation：The compressed air come from air reservoir is introduced into
Combustion chamber and fuel mixed combustion, improve its temperature, enter back into gas turbine acting.But compensation combustion type compressed-air energy-storage system
There is the drawbacks of its is intrinsic, be mainly shown as at following 2 points：First, it is necessary to which substantial amounts of fuel, energy consumption is big, and can cause big
Gas pollutes, and aggravates carbon emission, unfriendly to environment；Second, fail to recycle the heat that compression process produces, system capacity turns
Change less efficient.Therefore develop non-compensation combustion type compressed air energy storage technology to be particularly important.And general compressed-air energy storage
System causes high pressure stage compressor pressure at expulsion constantly to raise and hiigh pressure stage expanding machine air-breathing due to the limited volume of gas storage equipment
Pressure constantly reduces, so as to greatly affected the energy conversion efficiency of system；Compressor and expanding machine internal temperature become at the same time
Change is very big, deviates preferable isothermal operating mode farther out, also have impact on the energy conversion efficiency of system.
The content of the invention
Have in view of that, it is necessary in view of the defects existing in the prior art, there is provided a kind of stability is good, energy conversion efficiency is high
Compressed-air energy-storage system.
To achieve the above object, the present invention uses following technical proposals：
A kind of compressed-air energy-storage system, including compression unit, expansion cell, gas storage unit, thermal storage unit, heat exchange unit
And electric energy unit：
The high pressure stage compressor that the compression unit includes low-pressure stage compressor set, connects with the low-pressure stage compressor set
Group and compression gs-oil separator；The expansion cell includes low-pressure stage expansion unit, expands units connected in series with the low-pressure stage
Hiigh pressure stage expansion unit and expansion gs-oil separator；The gas storage unit includes air accumulator；The thermal storage unit includes height
Warm oil tank and low temperature oil tank；The heat exchange unit includes cooler and heater；The electric energy unit includes motor unit and hair
Motor group；Wherein：
The motor unit will convert electrical energy into mechanical energy and pass to the low-pressure stage compressor set, the low-pressure stage pressure
Contracting unit compresses air to middle pressure, and compressed middle pressure air is introduced into the cooler, and the heat of compression of generation is through described cold
But device is transferred to the accumulation of heat oil in the low temperature oil tank；
The heat transfer of middle pressure air is given in the low temperature oil tank accumulation of heat oil introduced, the storage after heating by the cooler
Deep fat is introduced into the high temperature oil tank, and middle pressure air after cooling is introduced into the high pressure stage compressor group, draws the low temperature
Accumulation of heat oil and penetrating in oil tank form the first gas mixture into the high pressure stage compressor group；
After first gas mixture is separated by the compression with oil eliminator, wherein, the accumulation of heat oil quilt after heating
The high temperature oil tank is introduced to, compressed pressure-air is stored in the air accumulator and stores；
The pressure-air exports from the air accumulator and is introduced to expansion work in the hiigh pressure stage expansion unit, institute
The oil of the accumulation of heat in high temperature oil tank is stated to draw and spray into hiigh pressure stage expansion unit the second gas mixture of formation；
The heater gives the heat transfer for the accumulation of heat oil being introduced into the high temperature oil tank to middle pressure air, storage after cooling
Deep fat is introduced into the low temperature oil tank, and the middle pressure air after heating is introduced into the low-pressure stage expansion unit, and further expansion is done
Work(, expansion work are converted into stable electric energy through the generating set and are connected to the grid.
In certain embodiments, the low-pressure stage compressor set is composed in parallel by least a set of identical compressor set, its
In, any one set compressor set is velocity profile compressor or displacement type compressor.
In certain embodiments, the identical compressor group that often set low-pressure stage compressor set is operated in opposite directions by two corotation moving axis
Into.
In certain embodiments, the high pressure stage compressor group is composed in parallel by least a set of identical compressor set, its
In, any one screw compressor for covering compressor set and being adjusted for ease of pressure ratio, its pressure of inspiration(Pi) is constant, and pressure at expulsion can be one
Determine to change in scope.
In certain embodiments, the SCREW COMPRESSOR that often set high pressure stage compressor group is operated in opposite directions by two corotation moving axis
Into.
In certain embodiments, the low-pressure stage expansion unit is composed in parallel by least a set of identical expansion unit, its
In, any a set of expanding machine group is turbo-expander or piston expansion engine.
In certain embodiments, the same expansion unit that low-pressure stage expansion unit is operated in opposite directions by two corotation moving axis is often covered
Into.
In certain embodiments, the hiigh pressure stage expansion unit is composed in parallel by least a set of identical expansion unit, its
In, screw type expansion machine that any a set of expanding machine group is adjusted for ease of pressure ratio, its pressure of inspiration(Pi) can change within the specific limits,
Pressure at expulsion is constant.
In certain embodiments, the screw expansion unit that hiigh pressure stage expansion unit is operated in opposite directions by two corotation moving axis is often covered
Into.
In certain embodiments, the cooler is dividing wall type heat exchanger.
In certain embodiments, the heater is dividing wall type heat exchanger.
The present invention is using the beneficial effect of above-mentioned technical proposal：
Compressed-air energy-storage system provided by the invention, including compression unit, expansion cell, gas storage unit, thermal storage unit,
Heat exchange unit and electric energy unit, the compression unit include low-pressure stage compressor set and high pressure stage compressor group, and the expansion is single
Member includes low-pressure stage expansion unit and hiigh pressure stage expansion unit, and the compression unit and expansion cell that the present invention uses are combined type
Structure, using two same model compressors or expanding machine rotated in opposite directions with rotation axis to be a set of, one or more sets units and through transport
The units connected in series operation of behavior level-one, two-stage and the above together constitutes whole compression unit and expansion cell, so on the one hand
Be conducive to adapt to the energy storage demand of various ranks, be on the other hand suitable for the cycle of operation of different length, in addition, being conducive to offset
Axial force, improves the stability of whole system.
Meanwhile compressed-air energy-storage system provided by the invention, the high pressure stage compressor in compression unit use screw rod pressure
Contracting machine, the hiigh pressure stage expanding machine in expansion cell use screw expander, easy to adjust pressure ratio so as to adapting to arrange in compression process
The actual condition that atmospheric pressure gradually rises, pressure of inspiration(Pi) gradually reduces in expansion process, improves the energy conversion efficiency of system,
The oil spout heat exchange of hiigh pressure stage is advantageously implemented at the same time.
In addition, compressed-air energy-storage system provided by the invention, eliminates the cooler and heater of hiigh pressure stage, then adopt
The mode heated with Oil injection cooling and oil spout, so as to eliminate the cooler and heater of hiigh pressure stage, simplifies system structure, together
When optimize the running environment of high pressure stage compressor and expanding machine, improve compression efficiency and expansion efficiency.
Finally, compressed-air energy-storage system provided by the invention, can utilize various forms of electric energy, cycle of operation spirit
Living, the scope of application is wide, environmental-friendly, and performance efficiency is stable, has good application prospect.
Brief description of the drawings
Fig. 1 is the structure diagram of compressed-air energy-storage system provided by the invention；
Fig. 2 is the structure diagram of compression unit in compressed-air energy-storage system provided by the invention；
Fig. 3 is the structure diagram of expansion cell in compressed-air energy-storage system provided by the invention；
Fig. 4 is the structure diagram for the compressed-air energy-storage system that the embodiment of the present invention 1 provides；
Fig. 5 is the structure diagram for the compressed-air energy-storage system that the embodiment of the present invention 2 provides.
Wherein：
1/22/23/24/25- low-pressure stages compressor (group)；2- coolers；3/26/27/28/29- high pressure stage compressors
(group)；4- compression oil eliminators；5- air intake valves；6- air accumulators；7- drain taps；8/34/35/36/37- hiigh pressure stages expand
Machine (group)；9- expansion oil eliminators；10- heaters；11/38/39/40/41- low-pressure stages expanding machine (group)；12- high temperature oils
Tank；13- high temperature break valves；14- high temperature oil pumps；15- high temperature adjustable valves；16- low temperature oil tanks；17- cryogenic globe valves；18- low temperature
Oil pump；19- low temperature regulating valves；20/30/31- motor units；21/42/43- generating sets；44- medium temperature oil tanks；45- medium temperatures are cut
Only valve；46- medium temperature oil pumps.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with attached drawing and specific implementation
Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only explaining this hair
It is bright, it is not intended to limit the present invention.
Referring to Fig. 1, be the structure diagram of compressed-air energy-storage system 100 provided by the invention, including：Compression is single
Member, expansion cell, gas storage unit, thermal storage unit, heat exchange unit and electric energy unit.
Incorporated by reference to Fig. 2, for the structure diagram of compression unit provided by the invention, the compression unit includes low-pressure stage pressure
Contracting unit, the high pressure stage compressor group connected with the low-pressure stage compressor set and compression gs-oil separator 4.
Wherein, low-pressure stage compressor set is composed in parallel by least a set of identical compressor 1 (22/23,24/25), high pressure
Level compressor set is composed in parallel by least a set of identical compressor 3 (26/27,28/29).It is appreciated that rotated to offset
Caused axial force, improve operation stability, often covers low-pressure stage compressor set and high pressure stage compressor group and is moved for two corotation
Axis operates identical compressor in opposite directions.
Specifically, the compressor in low-pressure stage compressor set is identical any form of velocity profile compressor or displacement type
Compressor；Compressor in high pressure stage compressor group is adjusted for ease of pressure ratio and the screw compressor of Oil injection cooling, it is vented
Pressure can change within the specific limits, and equipped with compression with oil eliminator 4 to by high-temperature heat accumulation oil separated with compressed air
Come.
It is appreciated that the set of the capacity and compressor set inner compressor of low-pressure stage compressor set and high pressure stage compressor group
The capacity of number and every compressor is determined by the compressed air require needed for energy conversion system.
It is described swollen for the structure diagram of expansion cell in compressed-air energy-storage system provided by the invention incorporated by reference to Fig. 3
Swollen unit includes low-pressure stage expansion unit, hiigh pressure stage expansion unit and expansion oil gas with low-pressure stage expansion units connected in series
Separator 9.
Wherein, the low-pressure stage expansion unit is composed in parallel by least a set of identical expanding machine 11 (38/39,40/41).
The hiigh pressure stage expansion unit is composed in parallel by least a set of identical expanding machine 8 (34/35,36/37), it will be understood that in order to
Offset axial force caused by rotating, improve operation stability, it is two often to cover low-pressure stage expansion unit and high pressure expansion machine group
Corotation moving axis operates identical expanding machine in opposite directions.
Further, the expanding machine in low-pressure stage expansion unit is identical any form of turbo-expander or piston
Formula expanding machine；Expanding machine in hiigh pressure stage expansion unit is adjusted for ease of pressure ratio and the screw type expansion machine of Oil injection cooling, it is arranged
Atmospheric pressure can change within the specific limits, and be furnished with expansion side oil eliminator 9 Low Temperature Storage deep fat to be separated with expanded air
Come.
It is appreciated that the set of the capacity and compressor set inner compressor of low-pressure stage expansion unit and hiigh pressure stage expansion unit
Several and every expanding machine capacity is determined by the compressed air require needed for energy conversion system.
Referring again to Fig. 1, the working method of above-mentioned compressed-air energy-storage system 100 is as follows：
The motor unit 30 converts electrical energy into mechanical energy and passes to the low-pressure stage compressor set 1, the motor
Group 31 converts electrical energy into mechanical energy and passes to the low-pressure stage compressor set 3, and the low-pressure stage compressor set 1 is by the air
Middle pressure is compressed to, compressed middle pressure air is introduced into the cooler 2；
The heat transfer of middle pressure air is given in the low temperature oil tank 16 the accumulation of heat oil introduced by the cooler 2, after heating
Accumulation of heat oil be introduced into the high temperature oil tank 12, middle pressure air after cooling is introduced into the high pressure stage compressor group 3, draws institute
State the oil of the accumulation of heat in low temperature oil tank 16 and spray into and form the first gas mixture into the high pressure stage compressor group 3；
After first gas mixture is separated by the compression with oil eliminator 4, wherein, the accumulation of heat oil quilt after heating
The high temperature oil tank 12 is introduced to, compressed pressure-air is stored in the air accumulator 6 and stores；
The pressure-air exports from the air accumulator 6 and is introduced to expansion work in the hiigh pressure stage expansion unit 8,
Accumulation of heat oil in the high temperature oil tank 12, which is drawn and sprayed into hiigh pressure stage expansion unit 8, forms the second gas mixture；
Second gas mixture is separated by the expansion oil eliminator 9, wherein, accumulation of heat oil after cooling is drawn
Enter in the low temperature oil tank 16, the middle pressure air after expansion is introduced into the heater 10；
The heater 10 gives the heat transfer for the accumulation of heat oil being introduced into the high temperature oil tank 12 to middle pressure air, after cooling
Accumulation of heat oil be introduced into the low temperature oil tank 16, the middle pressure air after heating is introduced into low-pressure stage expansion unit 11 into one
Expansion work is walked, hiigh pressure stage expansion work is converted into stable electric energy through the generating set 42 and is connected to the grid, low-pressure stage expansion work
Stable electric energy is converted into through the generating set 43 to be connected to the grid.
Compressed-air energy-storage system provided by the invention, including compression unit, expansion cell, gas storage unit, thermal storage unit,
Heat exchange unit and electric energy unit, the compression unit include low-pressure stage compressor set and high pressure stage compressor group, and the expansion is single
Member includes low-pressure stage expansion unit and hiigh pressure stage expansion unit, and the compression unit and expansion cell that the present invention uses are combined type
Structure, using two same model compressors or expanding machine rotated in opposite directions with rotation axis to be a set of, one or more sets units and through transport
The units connected in series operation of behavior level-one, two-stage and the above together constitutes whole compression unit and expansion cell, so on the one hand
Be conducive to adapt to the energy storage demand of various ranks, be on the other hand suitable for the cycle of operation of different length, in addition, being conducive to offset
Axial force, improves the stability of whole system.
Meanwhile compressed-air energy-storage system provided by the invention, the high pressure stage compressor in compression unit use screw rod pressure
Contracting machine, the hiigh pressure stage expanding machine in expansion cell use screw expander, easy to adjust pressure ratio so as to adapting to arrange in compression process
The actual condition that atmospheric pressure gradually rises, pressure of inspiration(Pi) gradually reduces in expansion process, improves the energy conversion efficiency of system,
The oil spout heat exchange of hiigh pressure stage is advantageously implemented at the same time.
In addition, compressed-air energy-storage system provided by the invention, eliminates the cooler and heater of hiigh pressure stage, then adopt
The mode heated with Oil injection cooling and oil spout, so as to eliminate the cooler and heater of hiigh pressure stage, simplifies system structure, together
When optimize the running environment of high pressure stage compressor and expanding machine, improve compression efficiency and expansion efficiency.
Finally, compressed-air energy-storage system provided by the invention, can utilize various forms of electric energy, cycle of operation spirit
Living, the scope of application is wide, environmental-friendly, and performance efficiency is stable, has good application prospect.
Above-mentioned technical proposal of the present invention is described in detail below in conjunction with specific embodiment.
Embodiment 1
Referring to Fig. 4, the structure diagram of the compressed-air energy-storage system provided for the embodiment of the present invention 1.
Wherein, its compression unit is two stages of compression, and wherein low-pressure stage is velocity profile compressor set, and hiigh pressure stage is for ease of pressure ratio
The screw type expansion machine group of adjusting；Every grade is made of two sets of compressor sets, often covers what compressor set was rotated in opposite directions by same rotation axis
The compressor set of two same models into；Low-pressure stage is cooled down using dividing wall type heat exchanger, and hiigh pressure stage uses Oil injection cooling.It is expanded
Unit is double expansion, the screw type expansion machine group that wherein hiigh pressure stage is adjusted for ease of pressure ratio, and low-pressure stage is velocity profile expanding machine
Group, every grade is made of two sets of expansion units, the expansion for two same models that often set expansion unit is rotated in opposite directions by same rotation axis
Machine forms；Hiigh pressure stage is heated using oil spout, and low-pressure stage is heated using dividing wall type heat exchanger.
Under compact model, air intake valve 6 is opened, and drain tap 8 is closed, and cryogenic globe valve 17 and low temperature regulating valve 19 are beaten
Open, high temperature break valve 13 and high temperature adjustable valve 15 are closed, and motor unit 30,31 and low temperature oil pump 18 start, generating set 41,42
Stop transport with high temperature oil pump 14.The air of normal temperature and pressure is introduced into compression unit low-pressure stage compressor set, be assigned to compressor 22,
23rd, middle pressure air is compressed into 24 and 25, temperature raises after it absorbs heat of compression；Then this four bursts of air remittances are combined into low
Arbitrarily downgrade 2 air side of cooler, simultaneously the low-temperature heat accumulating through cryogenic globe valve 17 and low temperature oil pump 18 from low temperature oil tank 16
Oil enters the oily side of low-pressure stage cooler 2, and two fluids carries out wall-type heat exchange；The accumulation of heat oil of low temperature, which is heated, subsequently enters high temperature
Stored for future use in oil tank 12, the middle pressure air of high temperature, which is cooled, subsequently enters high pressure stage compressor group, be assigned to compressor 26,
27th, further compress in 28 and 29, simultaneously through cryogenic globe valve 17, low temperature oil pump 18 and low temperature tune from low temperature oil tank 16
The Low Temperature Storage deep fat of section valve 19 enters high pressure stage compressor group, is assigned in compressor 26,27,28 and 29 and plays cooling, close
The effect of envelope and lubrication；It is gas mixture from the discharge of high pressure stage compressor group, it enters in compressed side oil eliminator 4, high
Intermediate temperature regenerator oil and pressure-air are separated；Wherein high-temperature heat accumulation oil, which enters in high temperature oil tank 12, stores for future use, and pressure-air
Enter through air intake valve 5 in air accumulator 6 and store for future use.
After compact model, air intake valve 6, cryogenic globe valve 17 and low temperature regulating valve 19, stoppage in transit motor unit are closed
30th, 31 and low temperature oil pump 18.
Under expansion mechanism, air intake valve 6 is closed, and drain tap 8 is opened, and cryogenic globe valve 17 and low temperature regulating valve 19 are closed
Close, high temperature break valve 13 and high temperature adjustable valve 15 are opened, and motor unit 30,31 and low temperature oil pump 18 are stopped transport, generating set 41,42
Start with high temperature oil pump 14.The air of normal temperature high voltage is introduced into expansion cell hiigh pressure stage expanding machine from air accumulator 6 through drain tap 7
Group, is assigned in expansion unit 34,35,36 and 37 and is expanded into middle pressure air, and exports expansion work and generate electricity to generating set 41；With
This high-temperature heat accumulation oil drawn at the same time from high temperature oil tank 12 through high temperature break valve 13, high temperature oil pump 14 and high temperature adjustable valve 15 into
Enter hiigh pressure stage expansion unit, be assigned in expanding machine 34,35,36 and 37 and play the role of heating, sealing and lubrication；From hiigh pressure stage
Expand unit discharge for gas mixture, it enters in expansion side oil eliminator 9, and Low Temperature Storage deep fat and middle pressure air are divided
From；Wherein Low Temperature Storage deep fat enters in low temperature oil tank 16 and stores for future use, and middle pressure air enters 10 air side of low-pressure stage heater,
The high-temperature heat accumulation oil simultaneously drawn from high temperature oil tank 12 adds through high temperature break valve 13 and high temperature oil pump 14 into low-pressure stage
The hot oily side of device 10, two fluids carry out wall-type heat exchange；Accumulation of heat oil cooled subsequently enter of high temperature stores in low temperature oil tank 16
Spare, the middle pressure air of low temperature, which is heated, subsequently enters low-pressure stage expansion unit, in being assigned to 38,39,40 and 41 further
Expansion, and export expansion work and generate electricity to generating set 42；Air after expansion is discharged into external environment, or is set into other
It is standby to recycle its cold.
After expansion mechanism, drain tap 8, high temperature break valve 13 and high temperature adjustable valve 15, stoppage in transit generating set are closed
42nd, 43 and high temperature oil pump 14, whole system work finishes.
Embodiment 2
Referring to Fig. 5, the structure diagram of the compressed-air energy-storage system provided for the embodiment of the present invention 2.
Wherein, compression unit is two stages of compression, and wherein low-pressure stage is displacement type compressor group, and hiigh pressure stage is for ease of pressure ratio tune
The screw type expansion machine group of section；Every grade is made of two sets of compressor sets, often cover compressor set rotated in opposite directions by same rotation axis two
The compressor set of platform same model into；Low-pressure stage is cooled down using dividing wall type heat exchanger, and hiigh pressure stage uses Oil injection cooling.It expands single
Member is double expansion, and the screw type expansion machine group that wherein hiigh pressure stage is adjusted for ease of pressure ratio, low-pressure stage is displacement type expander group,
Every grade is made of two sets of expansion units, the expansion unit for two same models that often set expansion unit is rotated in opposite directions by same rotation axis
Into；Hiigh pressure stage is heated using oil spout, and low-pressure stage is heated using dividing wall type heat exchanger.
Under compact model, air intake valve 6 is opened, and drain tap 8 is closed, and cryogenic globe valve 17 and low temperature regulating valve 19 are beaten
Open, medium temperature shut-off valve 45 and high temperature break valve 13 are closed, and motor unit 30/31 and low temperature oil pump 18 start, generating set 41/
42nd, medium temperature oil pump 46 and high temperature oil pump 14 are stopped transport.The air of normal temperature and pressure is introduced into compression unit low-pressure stage compressor set, distribution
Middle pressure air is compressed into compressor 22,23,24 and 25, temperature raises after it absorbs the heat of compression；Then this four strands of air
Remittance is combined into 2 air side of low-pressure stage cooler, simultaneously through cryogenic globe valve 17 and low temperature oil pump from low temperature oil tank 16
18 Low Temperature Storage deep fat enters the oily side of low-pressure stage cooler 2, and two fluids carries out wall-type heat exchange；The accumulation of heat oil of low temperature is heated
Subsequently enter and stored for future use in high temperature oil tank 12, the middle pressure air of high temperature, which is cooled, subsequently enters high pressure stage compressor group, is divided
It is fitted in compressor 26,27,28 and 29 and further compresses, simultaneously through cryogenic globe valve 17, low temperature from low temperature oil tank 16
Oil pump 18 and the Low Temperature Storage deep fat of low temperature regulating valve 19 enter high pressure stage compressor group, are assigned to compressor 26,27,28 and 29
In play the role of cooling, sealing and lubrication；It is gas mixture from the discharge of high pressure stage compressor group, it enters compressed side oil
In separator 4, medium temperature regenerator oil and pressure-air are separated；Wherein medium temperature regenerator oil enter medium temperature oil tank 44 in store it is standby
With, and pressure-air in the entrance air accumulator 6 of air intake valve 5 through storing for future use.
After compact model, air intake valve 6, cryogenic globe valve 17 and low temperature regulating valve 19, stoppage in transit motor unit are closed
30th, 31 and low temperature oil pump 18.
Under expansion mechanism, air intake valve 6 is closed, and drain tap 8 is opened, and cryogenic globe valve 17 and low temperature regulating valve 19 are closed
Close, medium temperature shut-off valve 45 and high temperature break valve 13 are opened, and motor unit 30/31 and low temperature oil pump 18 are stopped transport, generating set 41/
42nd, medium temperature oil pump 46 and high temperature oil pump 14 start.The air of normal temperature high voltage is introduced into expansion list from air accumulator 6 through drain tap 7
First hiigh pressure stage expands unit, is assigned in expansion unit 34,35,36 and 37 and is expanded into middle pressure air, and exports expansion work to hair
Motor group 41 generates electricity；At the same time the medium temperature regenerator oil drawn from medium temperature oil tank 44 is through medium temperature shut-off valve 45 and medium temperature oil pump 46
Unit is expanded into hiigh pressure stage, is assigned in expanding machine 34,35,36 and 37 and plays the role of heating, sealing and lubrication；From high pressure
Level expansion unit discharge for gas mixture, it enters in expansion side oil eliminator 9, and Low Temperature Storage deep fat and middle pressure air are able to
Separation；Wherein Low Temperature Storage deep fat enters in low temperature oil tank 16 and stores for future use, and middle pressure air enters 10 air of low-pressure stage heater
Side, the high-temperature heat accumulation oil simultaneously drawn from high temperature oil tank 12 enter low-pressure stage through high temperature break valve 13 and high temperature oil pump 14
The oily side of heater 10, two fluids carry out wall-type heat exchange；Accumulation of heat oil cooled subsequently enter of high temperature is stored up in low temperature oil tank 16
Deposit it is spare, the middle pressure air of low temperature be heated subsequently enters low-pressure stage expansion unit, into one in being assigned to 38,39,40 and 41
Step expansion, and export expansion work and generate electricity to generating set 42；Air after expansion is discharged into external environment, or into other
Equipment recycles its cold.
After expansion mechanism, drain tap 8, medium temperature shut-off valve 45 and high temperature break valve 13, stoppage in transit generating set are closed
42/43rd, medium temperature oil pump 46 and high temperature oil pump 14, whole system work finish.
The above described is only a preferred embodiment of the present invention, not make limitation in any form to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any to be familiar with this professional technology people
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, as long as being the technical spirit pair according to the present invention without departing from technical solution of the present invention content
Any simple modification, equivalent change and modification that above example is made, in the range of still falling within technical solution of the present invention.
Claims (11)
1. a kind of compressed-air energy-storage system, it is characterised in that including compression unit, expansion cell, gas storage unit, accumulation of heat list
Member, heat exchange unit and electric energy unit：
The compression unit include low-pressure stage compressor set, the high pressure stage compressor group connected with the low-pressure stage compressor set and
Compression gs-oil separator；The expansion cell includes low-pressure stage expansion unit, the height with low-pressure stage expansion units connected in series
Arbitrarily downgrade and expand unit and expansion gs-oil separator；The gas storage unit includes air accumulator；The thermal storage unit includes high temperature oil
Tank and low temperature oil tank；The heat exchange unit includes cooler and heater；The electric energy unit includes motor unit and generator
Group；Wherein：
The motor unit converts electrical energy into mechanical energy and passes to the low-pressure stage compressor set, the low-pressure stage compressor set
Middle pressure is compressed air to, compressed middle pressure air is introduced into the cooler；
The heat transfer of middle pressure air is given in the low temperature oil tank accumulation of heat oil introduced by the cooler, the accumulation of heat oil after heating
The high temperature oil tank is introduced into, middle pressure air after cooling is introduced into the high pressure stage compressor group, draws the low temperature oil tank
Interior accumulation of heat is oily and penetrating forms the first gas mixture into the high pressure stage compressor group；
After first gas mixture is separated by the compression with oil eliminator, wherein, the accumulation of heat oil after heating is introduced into
To the high temperature oil tank, compressed pressure-air is stored in the air accumulator；
The pressure-air exports from the air accumulator and is introduced to expansion work in the hiigh pressure stage expansion unit, the height
Accumulation of heat oil in warm oil tank, which is drawn and sprayed into hiigh pressure stage expansion unit, forms the second gas mixture；
The heater gives the heat transfer for the accumulation of heat oil being introduced into the high temperature oil tank to middle pressure air, accumulation of heat oil after cooling
It is introduced into the low temperature oil tank, the middle pressure air after heating is introduced into the low-pressure stage expansion further expansion work of unit,
Expansion work is converted into stable electric energy through the generating set and is connected to the grid.
2. compressed-air energy-storage system according to claim 1, it is characterised in that the low-pressure stage compressor set is by a set of
Compressor set forms, or covers identical compressor set more and compose in parallel, wherein, the type of any one set compressor set is velocity profile
Compressor or displacement type compressor.
3. compressed-air energy-storage system according to claim 2, it is characterised in that it is common by two wherein often to cover compressor set
The identical compressor composition of rotation axis operating.
4. compressed-air energy-storage system according to claim 1, it is characterised in that the high pressure stage compressor group is by a set of
Compressor set forms, or covers identical compressor set more and compose in parallel, wherein, the type of any one set compressor set is for ease of pressure
Than the screw compressor of adjusting, its pressure of inspiration(Pi) is constant, and pressure at expulsion can change within the specific limits.
5. compressed-air energy-storage system according to claim 4, it is characterised in that it is common by two wherein often to cover compressor set
The helical-lobe compressor composition of rotation axis operating.
6. compressed-air energy-storage system according to claim 1, it is characterised in that the low-pressure stage expands unit by a set of
Unit composition is expanded, or covers identical expansion unit more and composes in parallel, wherein, the type of any a set of expanding machine group is turbine type
Expanding machine or piston expansion engine.
7. compressed-air energy-storage system according to claim 6, it is characterised in that wherein often set expansion unit is common by two
The same expansion machine composition of rotation axis operating.
8. compressed-air energy-storage system according to claim 1, it is characterised in that the hiigh pressure stage expands unit by a set of
Unit composition is expanded, or covers identical expansion unit more and composes in parallel, wherein, the type of any a set of expanding machine group is for ease of pressure
Than the screw type expansion machine of adjusting, its pressure of inspiration(Pi) can change within the specific limits, and pressure at expulsion is constant.
9. compressed-air energy-storage system according to claim 8, it is characterised in that wherein often set expansion unit is common by two
The screw expander composition of rotation axis operating.
10. compressed-air energy-storage system according to claim 1, it is characterised in that the cooler is wall-type heat exchange
Device.
11. compressed-air energy-storage system according to claim 1, it is characterised in that the heater is wall-type heat exchange
Device.
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| CN107559179B (en) * | 2017-10-31 | 2018-12-28 | 清华大学 | A kind of compressed-air energy storage overbottom pressure utilization system |
| CN112855499B (en) * | 2020-12-30 | 2022-04-19 | 中盐华能储能科技有限公司 | Method for controlling inlet temperature of cascade compressor of compressed air energy storage power station |
| CN113202574B (en) * | 2021-05-24 | 2023-01-17 | 国网浙江省电力有限公司电力科学研究院 | Peak-shaving power generation system and method by coupling compressed air energy storage |
| DE202022101072U1 (en) * | 2022-02-24 | 2022-03-08 | Karl Morgenbesser | compressed air system |
| CN114961910A (en) * | 2022-05-27 | 2022-08-30 | 上海发电设备成套设计研究院有限责任公司 | Series-parallel connection combined type compressed air energy storage device system and method |
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