CN110578559A - Compressed air energy storage and heat regeneration system and method - Google Patents
Compressed air energy storage and heat regeneration system and method Download PDFInfo
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- CN110578559A CN110578559A CN201810585837.5A CN201810585837A CN110578559A CN 110578559 A CN110578559 A CN 110578559A CN 201810585837 A CN201810585837 A CN 201810585837A CN 110578559 A CN110578559 A CN 110578559A
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- control valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/08—Adaptations for driving, or combinations with, pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Abstract
The invention discloses a compressed air energy storage and heat regeneration system and a method, comprising an air compressor, an air storage chamber, a turbo expander, a bidirectional heat exchanger, a one-way heat exchanger, a high-temperature liquid storage tank and a low-temperature liquid storage tank; when energy is stored and heat is stored, the air compressor sucks the atmosphere and compresses the atmosphere to high temperature and high pressure, the atmosphere is cooled by the bidirectional heat exchanger and then is stored in the air storage chamber, and meanwhile, heat is stored in the high-temperature liquid storage tank through the bidirectional heat exchanger; when energy is released and heat is recovered, high-pressure air released by the air storage chamber is heated by the two-way heat exchanger and the one-way heat exchanger respectively and then enters the turboexpander, and meanwhile, heat is fed back to the high-pressure air by the two-way heat exchanger and the one-way heat exchanger. By reasonably designing the heat exchange areas and the power of the bidirectional heat exchanger and the unidirectional heat exchanger, the utilization rate of equipment can be effectively improved while basic functions of heat storage and heat regeneration are guaranteed, the investment cost of the equipment is reduced, and the occupied area is reduced.
Description
Technical Field
The invention relates to the technical field of compressed air energy storage, in particular to the technical field of heat regeneration of an adiabatic compressed air energy storage system.
Background
Energy storage technology, in particular the storage of electrical energy, is of great importance for the optimization and regulation of energy systems. During energy storage, the adiabatic compressed air energy storage technology uses power grid load valley power or renewable energy grid-connected limited power as input energy to drive a high-temperature compressor unit to generate high-temperature and high-pressure air, and heat energy is separated from the high-pressure air and then is stored independently, namely, electric energy is converted into heat energy and potential energy and then is stored; when releasing energy, the heat insulation compressed air energy storage technology utilizes the stored heat energy to heat the high-pressure air released by the air storage chamber, then the high-pressure air enters the turbo expander to expand and do work and drive the generator to generate electricity, namely the heat energy and the potential energy are converted into electric energy again. Through conversion, storage and regeneration of electric energy, the level and smooth of electric wire netting peak valley load can be realized to adiabatic compressed air energy storage technique, also can realize the calm and the quality promotion of volatility, intermittent type nature renewable energy power, has very big application and development potentiality under smart power grids big background.
Generally, the flow rate of the air compressor unit is smaller than that of the turbo-expander, for example, a peak-shaving compressed air energy storage system, the load valley of the power grid generally lasts eight to nine hours, while the peak of the power grid is usually about four hours, and all the high-pressure air stored in the load valley is released at the load peak for power generation, so that the flow rate of the turbo-expander is significantly larger than that of the air compressor. Therefore, the heat exchange area of the heat exchanger for heating the air inlet of the turboexpander is larger than that of the heat exchanger on the compressor side, and for high-temperature and high-pressure heat exchange equipment, the increase of the heat exchange area means the increase of the processing and manufacturing difficulty and the increase of the manufacturing cost; meanwhile, the energy storage and release processes are performed in a time-sharing manner, generally in a daily cycle or a weekly cycle, so that the utilization rate of equipment is low.
Disclosure of Invention
The invention mainly solves the technical problem of providing a compressed air energy storage and heat regeneration system and a method, and can solve the problems of low utilization rate and high investment cost of heat exchange equipment in an adiabatic compressed air energy storage system.
in order to solve the technical problems, the technical scheme adopted by the invention is to provide a compressed air energy storage regenerative system and a method, and the compressed air energy storage regenerative system is characterized in that: the system comprises an air compressor, an air storage chamber, a turbo expander, a bidirectional heat exchanger, a one-way heat exchanger, a high-temperature liquid storage tank and a low-temperature liquid storage tank;
The air compressor, the bidirectional heat exchanger and the air storage chamber are connected in series to form a first air branch, a first control valve is arranged between the air compressor and the bidirectional heat exchanger, and a second control valve is arranged between the bidirectional heat exchanger and the air storage chamber; the air storage chamber, the one-way heat exchanger and the turboexpander are connected in series to form a second air branch, and a third control valve is arranged between the air storage chamber and the one-way heat exchanger; a third air branch is arranged between the bidirectional heat exchanger and the turboexpander, and a fourth control valve is arranged on the third air branch;
The high-temperature liquid storage tank and the low-temperature liquid storage tank form regenerative cycle, and the regenerative cycle exchanges heat with the first air branch and the second air branch through the bidirectional heat exchanger and the one-way heat exchanger respectively; a first high-temperature branch and a second high-temperature branch are arranged between the high-temperature liquid storage tank and the bidirectional heat exchanger, a fifth control valve is arranged on the first high-temperature branch, and a sixth control valve is arranged on the second high-temperature branch; a first low-temperature branch and a second low-temperature branch are arranged between the low-temperature liquid storage tank and the bidirectional heat exchanger, a seventh control valve is arranged on the first low-temperature branch, and an eighth control valve is arranged on the second low-temperature branch; a ninth control valve is arranged between the high-temperature liquid storage tank and the one-way heat exchanger;
When energy is stored and heat is stored, high-temperature and high-pressure air discharged by the air compressor enters the bidirectional heat exchanger, heat is released and then enters the air storage chamber for storage, and heat enters the high-temperature liquid storage tank for storage; when energy is released and heat is recovered, high-pressure air released by the air storage chamber respectively enters the bidirectional heat exchanger and the one-way heat exchanger, the high-pressure air absorbs heat and is heated, then the high-pressure air enters the turbo expander, and meanwhile heat enters the bidirectional heat exchanger and the one-way heat exchanger from the high-temperature liquid storage tank.
further, when energy is stored and heat is stored, the first control valve, the second control valve, the fifth control valve and the seventh control valve are opened, and the third control valve, the fourth control valve, the sixth control valve, the eighth control valve and the ninth control valve are closed;
and when the energy is released for heat regeneration, the second control valve, the third control valve, the fourth control valve, the sixth control valve, the eighth control valve and the ninth control valve are opened, and the first control valve, the fifth control valve and the seventh control valve are closed.
Preferably, the air compressor has an intake flow rate less than the turboexpander.
Liquid heat storage working media are arranged in the regenerative circulation pipeline, the high-temperature liquid storage tank and the low-temperature liquid storage tank, and the liquid heat storage working media exchange heat with air through a bidirectional heat exchanger or a one-way heat exchanger.
And the heat return circulating pipeline is provided with a driving pump for driving the liquid heat storage working medium.
the compressed air energy storage heat regeneration system and the method have the advantages that the heat exchange area and power of the bidirectional heat exchanger and the unidirectional heat exchanger are reasonably designed, the basic functions of heat storage and heat regeneration can be guaranteed, the utilization rate of equipment is effectively improved, the investment cost of the equipment is reduced, and the occupied area is reduced.
drawings
FIG. 1 is a schematic system flow diagram illustrating a preferred embodiment of a compressed air energy storage and regeneration system and method of the present invention;
in the figure, 1: an air compressor; 2: a bi-directional heat exchanger; 3: an air storage chamber; 4: a one-way heat exchanger; 5: a turbo expander; 6: a high-temperature liquid storage tank; 7: a low-temperature liquid storage tank; a: a first control valve; b: a second control valve; c: a third control valve; d: a fourth control valve; e: a fifth control valve; f: a sixth control valve; g: a seventh control valve; h: an eighth control valve; a: a ninth control valve.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments.
Referring to fig. 1, an embodiment of the present invention includes:
A compressed air energy storage regenerative system and a method can solve the problems of low utilization rate and high investment cost of heat exchange equipment in an adiabatic compressed air energy storage system.
In order to solve the technical problems, the technical scheme adopted by the invention is to provide a compressed air energy storage regenerative system and a method, and the compressed air energy storage regenerative system is characterized in that: comprises an air compressor 1, a bidirectional heat exchanger 2, a gas storage 3, a one-way heat exchanger 4, a turbo expander 5, a high-temperature liquid storage tank 6 and a low-temperature liquid storage tank 7;
the inlet of the air compressor 1 is connected with the atmosphere, the outlet of the air compressor is provided with the first control valve a, the air compressor is connected with one end of the air side of the bidirectional heat exchanger 2 through the first control valve a, the end of the air side of the bidirectional heat exchanger 2 is connected with the inlet of the turbo expander 5 through the control valve 4, and the other end of the air side of the bidirectional heat exchanger 2 is connected with the opening of the air storage chamber 3 through the second control valve b; meanwhile, the opening of the air storage chamber 3 is connected with the air side inlet of the one-way heat exchanger 4 through the third control valve c, the air side outlet of the one-way heat exchanger 4 is connected with the inlet of the turboexpander 5, and the outlet of the turboexpander 5 is connected with the atmosphere.
The high-temperature liquid storage tank 6 and the low-temperature liquid storage tank 7 form a regenerative cycle, and the heat storage working medium side pipelines of the two-way heat exchanger 2 and the one-way heat exchanger 4 are arranged on the regenerative cycle pipeline; the high-temperature liquid storage tank 6 is connected with one end of the heat storage working medium side of the bidirectional heat exchanger 2 through the fifth control valve e and the sixth control valve f respectively, and the other end of the heat storage working medium side of the bidirectional heat exchanger 2 is connected with the low-temperature liquid storage tank 7 through the seventh control valve g and the eighth control valve h; the high-temperature liquid storage tank 6 is connected with a heat storage working medium side inlet of the one-way heat exchanger 4 through the ninth control valve i, and a heat storage working medium side outlet of the one-way heat exchanger 4 is connected with the low-temperature heat conduction oil tank.
during energy storage heat accumulation, air compressor 1 starts, first control valve an, second control valve b, fifth control valve e and seventh control valve g are opened, third control valve c, fourth control valve d, sixth control valve f, eighth control valve h and ninth control valve i are closed, become high temperature high pressure air and get into after the normal atmospheric air is compressed bidirectional heat exchanger 2, simultaneously, low temperature heat accumulation working medium by low temperature liquid storage pot 7 gets into bidirectional heat exchanger 2 with get into after the high temperature high pressure air heat transfer intensifies high temperature liquid storage pot 6 is stored, get into after the exothermal cooling of high temperature high pressure air store in the gas receiver 3.
when energy is released and heat is returned, the second control valve b, the third control valve c, the fourth control valve d, the sixth control valve f, the eighth control valve h and the ninth control valve i are opened, the first control valve a, the fifth control valve e and the seventh control valve g are closed, normal-temperature high-pressure air in the air storage chamber 3 simultaneously enters the bidirectional heat exchanger 2 and the one-way heat exchanger 4, meanwhile, high-temperature heat accumulation heat is simultaneously transferred into the bidirectional heat exchanger 2 and the one-way heat exchanger 4 from the high-temperature liquid storage tank 6 to exchange heat with the normal-temperature high-pressure air, cooled and then stored in the low-temperature liquid storage tank 7, and the normal-temperature high-pressure air absorbs heat and is heated and then enters the turbo expander 5 to do work expansion and drive the generator to output electric power.
The compressed air energy storage heat regeneration system and the method have the advantages that the heat exchange area and power of the bidirectional heat exchanger and the unidirectional heat exchanger are reasonably designed, the basic functions of heat storage and heat regeneration can be guaranteed, the utilization rate of heat exchange equipment can be effectively improved, the equipment investment cost is reduced, and the occupied area is reduced.
Finally, it should be stated that: the above description is only an embodiment of the compressed air energy storage and heat recovery system and method of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent process changes made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. A compressed air energy storage regenerative system and method, including air compressor, air receiver, turbo expander, two-way heat exchanger, one-way heat exchanger and high-temperature liquid storage pot and low-temperature liquid storage pot;
The air compressor, the bidirectional heat exchanger and the air storage chamber are connected in series to form a first air branch, a first control valve is arranged between the air compressor and the bidirectional heat exchanger, and a second control valve is arranged between the bidirectional heat exchanger and the air storage chamber; the air storage chamber, the one-way heat exchanger and the turboexpander are connected in series to form a second air branch, and a third control valve is arranged between the air storage chamber and the one-way heat exchanger; a third air branch is arranged between the bidirectional heat exchanger and the turboexpander, and a fourth control valve is arranged on the third air branch;
the high-temperature liquid storage tank and the low-temperature liquid storage tank form regenerative cycle, and the regenerative cycle exchanges heat with the first air branch and the second air branch through the bidirectional heat exchanger and the one-way heat exchanger respectively; a first high-temperature branch and a second high-temperature branch are arranged between the high-temperature liquid storage tank and the bidirectional heat exchanger, a fifth control valve is arranged on the first high-temperature branch, and a sixth control valve is arranged on the second high-temperature branch; a first low-temperature branch and a second low-temperature branch are arranged between the low-temperature liquid storage tank and the bidirectional heat exchanger, a seventh control valve is arranged on the first low-temperature branch, and an eighth control valve is arranged on the second low-temperature branch; a ninth control valve is arranged between the high-temperature liquid storage tank and the one-way heat exchanger;
When energy is stored and heat is stored, high-temperature and high-pressure air discharged by the air compressor enters the bidirectional heat exchanger, heat is released and then enters the air storage chamber for storage, and heat enters the high-temperature liquid storage tank for storage; when energy is released and heat is recovered, high-pressure air released by the air storage chamber respectively enters the bidirectional heat exchanger and the one-way heat exchanger, the high-pressure air absorbs heat and is heated, then the high-pressure air enters the turbo expander, and meanwhile heat enters the bidirectional heat exchanger and the one-way heat exchanger from the high-temperature liquid storage tank.
2. The compressed air energy storage heat recovery system and method according to claim 1, wherein:
When energy is stored and heat is stored, the first control valve, the second control valve, the fifth control valve and the seventh control valve are opened, and the third control valve, the fourth control valve, the sixth control valve, the eighth control valve and the ninth control valve are closed;
And when the energy is released for heat regeneration, the second control valve, the third control valve, the fourth control valve, the sixth control valve, the eighth control valve and the ninth control valve are opened, and the first control valve, the fifth control valve and the seventh control valve are closed.
3. the compressed air energy storage heat recovery system and method according to claim 1, wherein: the air compressor has an intake flow rate less than an intake flow rate of the turboexpander.
4. The compressed air energy storage heat recovery system and method according to claim 1, wherein: liquid heat storage working media are arranged in the regenerative circulation pipeline, the high-temperature liquid storage tank and the low-temperature liquid storage tank, and the liquid heat storage working media exchange heat with air through a bidirectional heat exchanger or a one-way heat exchanger.
5. A compressed air energy storage heat recovery system and method according to claim 3, wherein: and the heat return circulating pipeline is provided with a driving pump for driving the liquid heat storage working medium.
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| CN201810585837.5A CN110578559B (en) | 2018-06-08 | 2018-06-08 | Compressed air energy storage and heat regeneration system and method |
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| CN201810585837.5A CN110578559B (en) | 2018-06-08 | 2018-06-08 | Compressed air energy storage and heat regeneration system and method |
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| CN110578559A true CN110578559A (en) | 2019-12-17 |
| CN110578559B CN110578559B (en) | 2021-03-19 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111255720A (en) * | 2020-01-19 | 2020-06-09 | 中国科学院工程热物理研究所 | Temperature control variable working condition operation system based on heat accumulation type compressed air energy storage |
| CN112968629A (en) * | 2021-02-10 | 2021-06-15 | 北京科技大学 | Compressed gas purification system and process without external power supply |
| WO2022068223A1 (en) * | 2021-03-29 | 2022-04-07 | 中国长江三峡集团有限公司 | Compressed air energy storage system and method based on common heat storage and release loop |
| CN114837764A (en) * | 2022-05-18 | 2022-08-02 | 中国科学院工程热物理研究所 | Regenerative heat pump electricity storage system |
| CN115898829A (en) * | 2022-11-04 | 2023-04-04 | 中国电力工程顾问集团中南电力设计院有限公司 | CAES system shared by modularly configured heat exchange systems and use method |
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| CN115898829A (en) * | 2022-11-04 | 2023-04-04 | 中国电力工程顾问集团中南电力设计院有限公司 | CAES system shared by modularly configured heat exchange systems and use method |
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