CN103244215A - Method and device for improving energy conversion efficiency of compressed air energy storage technology - Google Patents
Method and device for improving energy conversion efficiency of compressed air energy storage technology Download PDFInfo
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- CN103244215A CN103244215A CN2013101679049A CN201310167904A CN103244215A CN 103244215 A CN103244215 A CN 103244215A CN 2013101679049 A CN2013101679049 A CN 2013101679049A CN 201310167904 A CN201310167904 A CN 201310167904A CN 103244215 A CN103244215 A CN 103244215A
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Abstract
The invention discloses a method and a device for improving the energy conversion efficiency of a compressed air energy storage technology. The method includes steps that the pressure of high-pressure compressed air is reduced by the aid of a composite pressure release device, then the high-pressure compressed air is turned into a medium-pressure driving air flow, and the medium-pressure driving air flow is turned into low-pressure exhaust air after driving a turbine expander to do work; and the low-pressure exhaust air is entrained by high-pressure compressed air flowing through the composite pressure release device and is mixed with the high-pressure compressed air, so that a medium-pressure air flow is formed and drives the turbine expander to do work. The method and the device for improving the energy conversion efficiency of the compressed air energy storage technology have the advantages of environmental protection, energy conservation and capability of improving the energy conversion efficiency of the compressed air energy storage technology.
Description
Technical field
The present invention relates to the storage art of electric energy, particularly relate to a kind of method and device that promotes compressed-air energy storage Technology Energy conversion efficiency.
Background technique
The major defect of existing compressed-air energy storage technology is that there is bigger energy loss by high pressure (7-10Mpa) in pressurized air to needed middle (about 4Mpa) this pressure regulation process of pressing of turbo-expander.Compressed air pressure is more high, it is more strong to represent his acting ability, and the empty energy storage technology of present compression all adopts the pressure regulator valve door to realize that pressurized air is by storing high pressure (as 8Mpa) to the needed middle adjusting of pressing work done pressure of turbo-expander, the pressure of 8Mpa to 4Mpa between this can just be lost in step-down valve the inside so, does not obtain utilizing.The energy loss that the pressure regulation process occurs has directly weakened the capacity for work of work done air-flow in follow-up turbo-expander.
Summary of the invention
Based on this, be necessary at the prior art defective, method and the device of a kind of environmental protection, lifting compressed-air energy storage Technology Energy conversion efficiency that energy conversion efficiency energy-conservation, the compressed-air energy storage technology is high is provided.
Its technological scheme is as follows.
A kind of method that promotes compressed-air energy storage Technology Energy conversion efficiency may further comprise the steps:
Press during high pressure air becomes by the step-down of compound voltage reducing device and drive air-flow, middle pressure becomes the weary gas of low pressure after driving the acting of air stream drives turbo-expander;
The high pressure air of flowing through in the compound voltage reducing device entrainments the weary gas of low pressure, and mixes with it to press in forming and drive air-flow turbo-expander is done work.
Further, promote the method for compressed-air energy storage Technology Energy conversion efficiency, further comprising the steps of:
When selecting n level turbo-expander to entrainment source of the gas as the weary gas of low pressure, close the stop valve of all the other turbo-expanders at different levels; Entrainment flow by the weary gas of regulating the n Flux Valve Control compound voltage reducing device that is connected with n level turbo-expander simultaneously.
Further, promote the method for compressed-air energy storage Technology Energy conversion efficiency, further comprising the steps of:
Press during high pressure air becomes by the step-down of compound voltage reducing device and drive air-flow, middle pressure drives air-flow through the acting of combustion chambers burn intensification rear driving turbo-expander.
Further, the compound voltage reducing device is sparger.
A kind of compressed-air energy storage Technology Energy conversion equipment comprises compressor bank unit, gas storage solution cavity and turbine expansion unit unit, and described compressor bank unit is connected with described turbine expansion unit unit by described gas storage solution cavity; Described turbine expansion unit unit comprises compound voltage reducing device and turbo-expander, and described compound voltage reducing device is that middle pressure drives air-flow to drive turbo-expander with the high pressure air step-down of gas storage solution cavity output; The weary gas of low pressure that described compound voltage reducing device is discharged turbo-expander entrainments.
Further, described compound voltage reducing device is sparger.
Further, described sparger comprises and entrainments the chamber, describedly entrainments that the chamber is provided with pressurized gas spray tube and weary gas entrainments mouth, and described pressurized gas spray tube is connected with described gas storage solution cavity, and described weary gas entrainments mouthful weary gas that is connected to described turbo-expander and exports.
Further, described turbine expansion unit unit also comprises stop valve and flow control valve, and described stop valve and flow control valve all are arranged at described weary gas and entrainment between the weary gas outlet of mouth and turbo-expander.
Further, described compressor bank unit comprises a plurality of compressors and a motor, and a plurality of compressors are connected in series and by motoring; A plurality of turbo-expanders are connected in series and share a generator.
Advantage or principle to the technical program describes below.
The technical program has replaced the pressure regulator valve door in the conventional art by utilizing sparger, can reclaim pressurized air by the energy of the high pressure conditions (as 8Mpa) that stores to this process of work done state (as 4Mpa).Sparger has two entrances, wherein pressurized gas spray tube feeds high pressure compressed gas, self pressure can be accelerated and reduce to high pressure compressed gas in injector interior, this accelerating process makes the pressure of high pressure compressed gas drop to be lower than weary gas to entrainment mouthful pressure at place, thereby the weary gas that weary gas entrainments mouthful the place can enter sparger under the pressure difference effect, mix with high velocity air in injector interior, finally these two strands of air-flows mix pressure driving air-flow in the formation, enter the turbo-expander acting again.
Clearly, this relies on sparger to realize that high pressure air is to the regulating method of target work done pressure, make that the very weak weary gas of low pressure of capacity for work has also become the target work done working medium that can do work originally, that is to say the total amount that has increased work done working medium with certain coefficient, originally have only the high pressure air of storage area to do work, be equivalent to the weary gas of low pressure and high pressure air two-part gas now and all have the acting ability, thereby can obviously improve the work done gas gross of system, and then improve the energy conversion efficiency of system.
The low-pressure gas source that quilt in the technical program entrainments is taken from the weary gas of low pressure that turbo-expander is discharged, and the weary gas of this part low pressure itself is through the turbo-expander acting, and decline has appearred in self pressure, and decline has also appearred in capacity for work.Under the sparger effect, after this part low pressure lacks gas and high pressure air mixes, become the new working medium with capacity for work in full again.Simultaneously, the weary gas of low pressure and high pressure air mixing make and its step-down power consumption are reduced the high pressure air step-down, also be conducive to improve the energy conversion efficiency of system.
Description of drawings
Fig. 1 is the structure principle chart of the described compressed-air energy storage Technology Energy of embodiment of the invention conversion equipment;
Fig. 2 is the structure principle chart of the described sparger of the embodiment of the invention;
Description of reference numerals:
10, compressor, 20, gas storage solution cavity, 310, first order turbo-expander, 311, first firing chamber, 312, first stop valve, 313, the first flow modulating valve, 320, second level turbo-expander, 321, second firing chamber, 322, second stop valve, 323, second flow control valve, 330, third level turbo-expander, 331, the 3rd firing chamber, the 332, the 3rd stop valve, the 333, the 3rd flow control valve, 340, sparger, 341, entrainment the chamber, 342, pressurized gas spray tube, 343, weary gas entrainments mouth.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is described in detail.
Promote the method for compressed-air energy storage Technology Energy conversion efficiency, may further comprise the steps:
Press during high pressure air becomes by the step-down of compound voltage reducing device and drive air-flow, middle pressure becomes the weary gas of low pressure after driving the acting of air stream drives turbo-expander;
The high pressure air of flowing through in the compound voltage reducing device entrainments the weary gas of low pressure, and mixes with it to press in forming and drive air-flow turbo-expander is done work.
Promote the method for compressed-air energy storage Technology Energy conversion efficiency, further comprising the steps of:
Press during high pressure air becomes by the step-down of compound voltage reducing device and drive air-flow, middle pressure drives air-flow through the acting of combustion chambers burn intensification rear driving turbo-expander.
When selecting n level turbo-expander to entrainment source of the gas as the weary gas of low pressure, close the stop valve of all the other turbo-expanders at different levels; Entrainment flow by the weary gas of regulating the n Flux Valve Control compound voltage reducing device that is connected with n level turbo-expander simultaneously.In the present embodiment, choose 3 grades of turbo-expanders, comprise first order turbo-expander, second level turbo-expander and third level turbo-expander.
Wherein, the compound voltage reducing device is sparger 340, can also be for having other device of the equal function of sparger.
Shown in Fig. 1 to 2, compressed-air energy storage Technology Energy conversion equipment comprises compressor bank unit, gas storage solution cavity 20 and turbine expansion unit unit, and the compressor bank unit is connected with turbine expansion unit unit by gas storage solution cavity 20.Turbine expansion unit unit comprises compound voltage reducing device and turbo-expander, and the compound voltage reducing device is that middle pressure drives the air stream drives turbo-expander with the high pressure air step-down of gas storage solution cavity 20 outputs.The weary gas of low pressure that the compound voltage reducing device is discharged turbo-expander entrainments.
Wherein, the compound voltage reducing device is sparger 340.Sparger 340 comprises and entrainments chamber 341, entrainments chamber 341 and is provided with pressurized gas spray tube 342 and weary gas and entrainments mouthfuls 343, and pressurized gas spray tube 342 is connected with gas storage solution cavity 20, and weary gas entrainments mouthful 343 weary gas that are connected to turbo-expander and exports.Turbine expansion unit unit also comprises stop valve and flow control valve, and stop valve and flow control valve all are arranged at weary gas and entrainment between the weary gas outlet of mouth and turbo-expander.The compressor bank unit comprises a plurality of compressors 10 and a motor, and a plurality of compressors 10 are connected in series and by motoring.A plurality of turbo-expanders are connected in series and share a generator.
At energy storage stage, 10 pairs of air of motoring compressor carry out multistage compression and cooling is stored in the gas storage solution cavity 20.
Discharge the stage at energy, after pressure drove air-flow during the high pressure air process sparger step-down in the gas storage solution cavity 20 became, again through entering first order turbo-expander 310. after 311 heating of first firing chamber
When the weary gas of the low pressure of discharging with first order turbo-expander 310 be sparger 340 entrainment source of the gas the time, the method of operation of energy-storage system is as follows: close second stop valve 322 and the 3rd stop valve 332 in the energy-storage system, cut off second level turbo-expander 320 and entrainment mouthful 343 passages that link to each other with the weary gas of low pressure that third level turbo-expander 330 is discharged with the weary gas of sparger 340.Open first stop valve 312, weary gas outlet and the weary gas of sparger 340 of UNICOM's first order turbo-expander 310 entrainments the passage of mouth 343, the weary gas of low pressure entrainments flow by 313 controls of first flow modulating valve, and the high pressure air that the weary gas of low pressure that first turbo-expander 310 is discharged and gas storage solution cavity 20 discharge forms new middle pressure driving air-flow and enters 310 actings of first turbo-expander after sparger 340 internal mix.The weary gas of the residue low pressure that first order turbo-expander 310 is discharged enters second level turbo- expander 320 and 330 actings of third level turbo-expander respectively after heating up through second firing chamber 321, and expansion work drives generator output stable power.
When the weary gas of the low pressure of discharging with second level turbo-expander 320 is the low-pressure gas source source that sparger 340 is rolled, cut off the weary gas outlet of first order turbo-expander 310, third level turbo-expander 330 and the passage between the sparger 340.The concrete method of operation is as follows: after middle pressure drove air-flow process first order turbo-expander 310, the weary gas of the low pressure of discharge promoted temperature and enters 320 actings of second level turbo-expander through second firing chamber 321.Under the situation that first stop valve 312 and the 3rd stop valve 332 are closed, open second stop valve 322, the part of the weary gas of low pressure that second level turbo-expander 320 is discharged enters sparger 340 through second flow control valve, 323 backs as entrainmenting air-flow, the weary gas of low pressure enters first order turbo-expander 310 with after high pressure air from gas storage solution cavity 20 mixes in sparger 340.The weary gas of the low pressure that remaining second level turbo-expander 320 is discharged enters 330 actings of third level turbo-expander after promoting temperature through the 3rd firing chamber 331, and the expansion work of turbo-expander output drives the generator output power.
When the low-pressure gas source source that the weary gas of the low pressure of discharging with third level turbo-expander 330 entrainments as sparger 340.The concrete method of operation is as follows: close first stop valve 312 and second stop valve 322, open the 3rd stop valve 332, after middle pressure driving air-flow passes through the first order, the second level and third level turbo-expander 310-330 continuously, the weary gas of the low pressure of discharging is behind the 3rd flow control valve 333, as the source of the gas that entrainments of sparger 340.Enter first order turbo-expander 310 after the low pressure that third level turbo-expander 330 is discharged lacks gas and the high pressure air of gas storage solution cavity 20 releases mixes in sparger 340, increase the overall capacity for work of system, promote the energy-storage system energy conversion efficiency.
Below only represent the mode of operation implemented in the embodiment of the invention, but do not get rid of simultaneously with two-stage or the three grades of turbo-expanders situation of entrainmenting source of the gas as sparger.
The present invention pays close attention to the scale that is fit to water resources shortage zone new energy electric power and stores a difficult problem; compressed-air energy storage technology with wind-powered electricity generation and solar electrical energy generation matched well ability is improved, promoted the potentiality that this new technology through engineering approaches is applied to China's renewable energy sources development field.
The present invention is different from conventional compression air energy storage technology and relies on pressure regulator valve to realize the step-down technology of gas storage solution cavity high pressure air, with sparger 340 or possess the equipment replacement pressure regulator valve of the equal effect of sparger, reduced the energy loss in the pressure adjustment process.
The equipment that the present invention relies on sparger or possesses the equal effect of sparger carries out the reduction regulation of gas storage solution cavity high-pressure air, both realized the reduction regulation of high-pressure air, realized the recycling of the weary gas of low pressure that turbo-expander is discharged again, but increased the total amount of work done working medium, promoted the energy conversion efficiency of compressed-air energy storage technology.
Advantage or principle to the embodiment of the invention describes below.
Present embodiment has replaced pressure regulator valve door in the conventional compression air energy storage technology by utilizing sparger 340, can reclaim pressurized air by the energy of the high pressure conditions (as 8Mpa) that stores to this process of work done state (as 4Mpa).Sparger 340 has two entrances, wherein pressurized gas spray tube 342 feeds high pressure compressed gas, high pressure compressed gas is in sparger 340 inner meeting acceleration and reduce self pressure, this accelerating process makes the pressure of high pressure compressed gas drop to be lower than weary gas to entrainment mouthful pressure at place, thereby the weary gas that weary gas entrainments mouthful the place can enter sparger 340 under the pressure difference effect, mix with high velocity air in sparger 340 inside, final these two strands of air-flows mix presses the driving air-flow in the formation, enter the turbo-expander acting again.
Clearly, this relies on sparger 340 to realize that high pressure air is to the regulating method of target work done pressure, make that the very weak weary gas of low pressure of capacity for work has also become the target work done working medium that can do work originally, that is to say the total amount that has increased work done working medium with certain coefficient, originally have only the high pressure air of storage area to do work, be equivalent to the weary gas of low pressure and high pressure air two-part gas now and all have capacity for work, thereby can obviously improve the work done gas gross of system, and then improve the energy conversion efficiency of system.
The low-pressure gas source that quilt in the present embodiment entrainments is taken from the weary gas of low pressure that turbo-expander is discharged, and the weary gas of this part low pressure itself is through the turbo-expander acting, and decline has appearred in self pressure, and decline has also appearred in capacity for work.Under the sparger effect, after this part low pressure lacks gas and high pressure air mixes, become the new working medium with capacity for work in full again.Simultaneously, the weary gas of low pressure and high pressure air mixing make and its step-down power consumption are reduced the high pressure air step-down, also be conducive to improve the energy conversion efficiency of system.
The above embodiment has only expressed several mode of execution of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (9)
1. a method that promotes compressed-air energy storage Technology Energy conversion efficiency is characterized in that, may further comprise the steps:
Press during high pressure air becomes by the step-down of compound voltage reducing device and drive air-flow, middle pressure becomes the weary gas of low pressure after driving the acting of air stream drives turbo-expander;
The high pressure air of flowing through in the compound voltage reducing device entrainments the weary gas of low pressure, and mixes with it to press in forming and drive air-flow turbo-expander is done work.
2. the method for lifting compressed-air energy storage Technology Energy conversion efficiency according to claim 1 is characterized in that, and is further comprising the steps of:
When selecting n level turbo-expander to entrainment source of the gas as the weary gas of low pressure, close the stop valve of all the other turbo-expanders at different levels; Entrainment flow by the weary gas of regulating the n Flux Valve Control compound voltage reducing device that is connected with n level turbo-expander simultaneously.
3. the method for lifting compressed-air energy storage Technology Energy conversion efficiency according to claim 1 is characterized in that, and is further comprising the steps of:
Press during high pressure air becomes by the step-down of compound voltage reducing device and drive air-flow, middle pressure drives air-flow through the acting of combustion chambers burn intensification rear driving turbo-expander.
4. according to the method for each described lifting compressed-air energy storage Technology Energy conversion efficiency of claim 1 to 3, it is characterized in that described compound voltage reducing device is sparger.
5. a compressed-air energy storage Technology Energy conversion equipment is characterized in that, comprises compressor bank unit, gas storage solution cavity and turbine expansion unit unit, and described compressor bank unit is connected with described turbine expansion unit unit by described gas storage solution cavity; Described turbine expansion unit unit comprises compound voltage reducing device and turbo-expander, and described compound voltage reducing device is that middle pressure drives air-flow to drive turbo-expander with the high pressure air step-down of gas storage solution cavity output; The weary gas of low pressure that described compound voltage reducing device is discharged turbo-expander entrainments.
6. compressed-air energy storage Technology Energy conversion equipment according to claim 5 is characterized in that, described compound voltage reducing device is sparger.
7. compressed-air energy storage Technology Energy conversion equipment according to claim 6, it is characterized in that, described sparger comprises and entrainments the chamber, describedly entrainment that the chamber is provided with pressurized gas spray tube and weary gas entrainments mouth, described pressurized gas spray tube is connected with described gas storage solution cavity, and described weary gas entrainments the weary gas outlet that mouth is connected to described turbo-expander.
8. compressed-air energy storage Technology Energy conversion equipment according to claim 7, it is characterized in that, described turbine expansion unit unit also comprises stop valve and flow control valve, and described stop valve and flow control valve all are arranged at described weary gas and entrainment between the weary gas outlet of mouth and turbo-expander.
9. according to the described compressed-air energy storage Technology Energy of claim 5 to 8 conversion equipment, it is characterized in that described compressor bank unit comprises a plurality of compressors and a motor, a plurality of compressors are connected in series and by motoring; A plurality of turbo-expanders are connected in series and share a generator.
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| CN106246269A (en) * | 2016-07-27 | 2016-12-21 | 山东大学 | A kind of restructural compressed-air energy-storage system and optimal control method thereof |
| CN106707750A (en) * | 2016-12-20 | 2017-05-24 | 中国核电工程有限公司 | Two-grade air lifting conveying system capable of reducing waste gas production and control method of two-grade air lifting conveying system |
| CN107939525A (en) * | 2017-11-07 | 2018-04-20 | 中国能源建设集团广东省电力设计研究院有限公司 | Combustion gas expanding machine working system and method in compressed-air energy-storage system |
| CN108979744A (en) * | 2018-09-10 | 2018-12-11 | 江苏煤化工程研究设计院有限公司 | Exchange energy device |
| CN109505666A (en) * | 2018-12-05 | 2019-03-22 | 中国科学院工程热物理研究所 | A kind of jet expansion compound compression air energy storage systems |
| CN109519230A (en) * | 2019-01-07 | 2019-03-26 | 贵州电网有限责任公司 | A kind of expansion power generator turns to fine-tune system and method |
| CN109915345A (en) * | 2019-04-23 | 2019-06-21 | 山东大学 | A kind of compressed-air energy-storage system and method with injector multilevel optimization |
| CN109973158A (en) * | 2019-05-09 | 2019-07-05 | 贵州电网有限责任公司 | A kind of expansion power generator combination regulating system and method |
| WO2022121266A1 (en) * | 2020-12-07 | 2022-06-16 | 至玥腾风科技集团有限公司 | Gas turbine energy storage system and peak-valley power generation mode |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109519230A (en) * | 2019-01-07 | 2019-03-26 | 贵州电网有限责任公司 | A kind of expansion power generator turns to fine-tune system and method |
| CN109519230B (en) * | 2019-01-07 | 2024-03-26 | 贵州电网有限责任公司 | Expansion generator conversion fine adjustment system and method |
| CN109915345A (en) * | 2019-04-23 | 2019-06-21 | 山东大学 | A kind of compressed-air energy-storage system and method with injector multilevel optimization |
| CN109915345B (en) * | 2019-04-23 | 2020-01-10 | 山东大学 | Multi-stage optimization compressed air energy storage system with ejector and method |
| CN109973158A (en) * | 2019-05-09 | 2019-07-05 | 贵州电网有限责任公司 | A kind of expansion power generator combination regulating system and method |
| WO2022121266A1 (en) * | 2020-12-07 | 2022-06-16 | 至玥腾风科技集团有限公司 | Gas turbine energy storage system and peak-valley power generation mode |
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