CN112325497A - Liquefied carbon dioxide energy storage system and application thereof - Google Patents

Liquefied carbon dioxide energy storage system and application thereof Download PDF

Info

Publication number
CN112325497A
CN112325497A CN202011317804.6A CN202011317804A CN112325497A CN 112325497 A CN112325497 A CN 112325497A CN 202011317804 A CN202011317804 A CN 202011317804A CN 112325497 A CN112325497 A CN 112325497A
Authority
CN
China
Prior art keywords
carbon dioxide
outlet
inlet
tank
communicated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011317804.6A
Other languages
Chinese (zh)
Inventor
刘展
孙文旭
杨绪青
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao University of Science and Technology
Original Assignee
Qingdao University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao University of Science and Technology filed Critical Qingdao University of Science and Technology
Priority to CN202011317804.6A priority Critical patent/CN112325497A/en
Publication of CN112325497A publication Critical patent/CN112325497A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
    • 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
    • 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
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
    • F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
    • F01K25/103—Carbon dioxide
    • 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
    • F01K7/32—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 using steam of critical or overcritical pressure
    • 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
    • F04B25/00—Multi-stage pumps
    • 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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/06—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using expanders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/24—Storage receiver heat
    • 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
    • Y02E60/14—Thermal energy storage
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

Abstract

The invention discloses a liquefied carbon dioxide energy storage system and application thereof, wherein the system adopts carbon dioxide as an energy storage medium, so that an artificial container can be used more flexibly, the energy density of the system is improved, a closed loop is formed in the system, and greenhouse gas release to the environment can be avoided; on the other hand, the liquefied carbon dioxide energy storage system disclosed by the invention can realize frequency modulation and peak load shifting of a power grid, and increase the utilization rate of renewable energy; the liquefied carbon dioxide energy storage system comprises: the system comprises a first compressor, a first cooler, a first hot tank, a first cold tank, a second heater, a first expander, a third expander, a cold accumulator, a throttle valve, a first liquid carbon dioxide storage tank, a second cold tank, a third cooler, a third heater, a second hot tank, a fourth heater, a fifth pump, a third cold tank, a second liquid carbon dioxide storage tank, a third hot tank, a separator, a fourth expander and a fourth cooler.

Description

Liquefied carbon dioxide energy storage system and application thereof
Technical Field
The invention belongs to the technical field of carbon dioxide energy storage, and particularly relates to a liquefied carbon dioxide energy storage system and application thereof.
Background
With the increasing emphasis on energy conservation and emission reduction, the energy storage technology is rapidly developed as an important means for smoothing the fluctuation of renewable energy, realizing the peak-load modulation and frequency modulation of the traditional power system and improving the grid-connected flexibility of the renewable energy. Compressed air energy storage is an important energy storage technology, and the working principle of the compressed air energy storage is to utilize redundant electric energy to compress air and store the air in an air storage cavity in the electricity utilization low peak period; high-pressure air is released in the peak period of power utilization, and the air is heated and then does work in the expansion machine to drive the generator to generate electric energy. Although the technology has been commercially operated, it relies on fossil fuel to heat high-pressure air during energy release, causing greenhouse gas emission, and has problems of low energy storage density, requiring specific geographical conditions to construct a large-sized gas storage chamber, etc., limiting the development of compressed air energy storage.
In summary, a new energy storage system for liquefied carbon dioxide and its application are needed.
Disclosure of Invention
The invention aims to provide a liquefied carbon dioxide energy storage system and application thereof, so as to solve one or more technical problems. On one hand, the invention adopts carbon dioxide as an energy storage medium, so that not only can the artificial container be used more flexibly and the energy density of the system is improved, but also the system forms a closed loop and can avoid releasing greenhouse gases to the environment; on the other hand, the liquefied carbon dioxide energy storage system disclosed by the invention can realize frequency modulation of a power grid, peak clipping and valley filling, and increase the utilization rate of renewable energy.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to a liquefied carbon dioxide energy storage system, which comprises: the system comprises a first compressor, a first cooler, a first hot tank, a first cold tank, a second heater, a first expander, a third expander, a cold accumulator, a throttle valve, a first liquid carbon dioxide storage tank, a second cold tank, a third cooler, a third heater, a second hot tank, a fourth heater, a fifth pump, a third cold tank, a second liquid carbon dioxide storage tank, a third hot tank, a separator, a fourth expander and a fourth cooler;
the outlet of the first compressor is communicated with the first inlet of the first cooler, and the first outlet of the first cooler is communicated with the first inlet of the fourth cooler; the second inlet of the first cooler is communicated with the outlet of the first cold tank, and the second outlet of the first cooler is communicated with the inlet of the first hot tank; the outlet of the first hot tank is communicated with the first inlet of the second heater, and the first outlet of the second heater is communicated with the inlet of the first cold tank;
a second inlet of the fourth cooler is communicated with an outlet of the third cold tank, and a second outlet of the fourth cooler is communicated with an inlet of the third hot tank; the outlet of the third hot tank is communicated with the first inlet of the fourth heater, and the first outlet of the fourth heater is communicated with the inlet of the third cold tank;
the first outlet of the fourth cooler is communicated with the inlet of a fourth expansion machine, and the outlet of the fourth expansion machine is communicated with the inlet of the separator; the first outlet of the separator is communicated with the third inlet of the fourth cooler, and the third outlet of the fourth cooler is communicated with the inlet of the first compressor; a second outlet of the separator is communicated with an inlet of a second liquid carbon dioxide storage tank, an outlet of the second liquid carbon dioxide storage tank is communicated with a second inlet of a fourth heater through a fifth pump, and a second outlet of the fourth heater is communicated with a second inlet of the second heater;
an inlet of the third expansion machine is communicated with a second outlet of the second heater, an outlet of the third expansion machine is communicated with a first inlet of a third cooler, a first outlet of the third cooler is communicated with an inlet of the first expansion machine, an outlet of the first expansion machine is communicated with a first inlet of the cold accumulator, a first outlet of the cold accumulator is communicated with an inlet of a first liquid carbon dioxide storage tank, and an outlet of the first liquid carbon dioxide storage tank is communicated with a second inlet of the cold accumulator through a throttle valve; a second outlet of the cold accumulator is communicated with a first inlet of a third heater, and a first outlet of the third heater is communicated with an inlet of the first compressor;
and a second outlet of the third heater is communicated with an inlet of the second cold tank, an outlet of the second cold tank is communicated with a second inlet of the third cooler, a second outlet of the third cooler is communicated with an inlet of the second hot tank, and an outlet of the second hot tank is communicated with a second inlet of the third heater.
The invention further improves the method and also comprises the following steps: a second compressor and a second cooler; the second compressor is arranged coaxially with the first compressor; the inlet of the second compressor is communicated with the first outlet of the first cooler, the outlet of the second compressor is communicated with the first inlet of the second cooler, and the first outlet of the second cooler is communicated with the first inlet of the fourth cooler; the second outlet of the second cooler is communicated with the inlet of the first hot tank, and the second inlet of the second cooler is communicated with the outlet of the first cold tank.
The invention further improves the method and also comprises the following steps: a first heater and a second expander; the second expander and the third expander are coaxially arranged; the first inlet of the first heater is communicated with the outlet of the first hot tank, and the first outlet of the first heater is communicated with the inlet of the first cold tank; the second inlet of the first heater is communicated with the second outlet of the fourth heater, the second outlet of the first heater is communicated with the inlet of the second expansion machine, and the outlet of the second expansion machine is communicated with the second inlet of the second heater.
The invention further improves the method and also comprises the following steps: a first heat sink; the first radiator is disposed between an outlet of the third expander and a first inlet of the third cooler.
The invention further improves the method and also comprises the following steps: a second heat sink; the second radiator is arranged between the inlet of the first compressor, the third outlet of the fourth cooler and the first outlet of the third heater.
The invention is further improved in that the first cooler, the first hot tank, the first cold tank and the second heater form an energy storage device, and water is used as a heat storage medium.
The invention is further improved in that the medium in the second hot tank, the second cold tank, the third hot tank and the third cold tank is methanol.
The invention relates to application of a liquefied carbon dioxide energy storage system, which is used as an energy storage system for intermittent power generation and power grid peak shaving of smooth renewable energy sources. The application comprises two modes of energy storage and energy release;
the energy storage process comprises the following steps: the low-pressure liquid carbon dioxide stored in the first liquid carbon dioxide storage tank flows through the throttling valve and enters the cold accumulator, the temperature of a heat exchange medium in the cold accumulator is higher than that of the liquid carbon dioxide, and the carbon dioxide absorbs heat and is converted from a liquid state to a gaseous state; gaseous carbon dioxide at the outlet of the cold end of the cold accumulator flows through the third heater to absorb heat stored in the heat storage medium of the second heat tank in the energy release process; the method comprises the following steps that carbon dioxide with the ambient temperature enters a first compressor, enters a first cooler after being compressed, heated and pressurized, is subjected to heat exchange with a heat-carrying medium from a first cold tank in the first cooler, the heat-carrying medium absorbing the compression heat is stored in a first hot tank, the carbon dioxide with the increased temperature and pressure enters a second cooler to be subjected to heat exchange with the heat-carrying medium from the first cold tank, and the heat-carrying medium absorbing the compression heat is stored in the first hot tank; supercritical carbon dioxide gas at the outlet of the cold end of the second cooler enters a fourth cooler and is cooled by heat-carrying medium from a third cold tank and carbon dioxide at the first outlet of the separator, the heat-carrying medium absorbing heat is stored in a third hot tank, and the supercritical carbon dioxide after heat exchange and cooling enters a fourth expansion machine for liquefaction; separating a carbon dioxide gas-liquid mixture generated in the liquefaction process in a separator, storing the separated liquid carbon dioxide in a second liquid carbon dioxide storage tank, and cooling the supercritical carbon dioxide from the outlet of the cold end of the second cooler by the separated gaseous carbon dioxide entering a fourth cooler; in the energy storage process, the energy consumed by the compressor is surplus electric energy of a power grid in the electricity utilization low peak period or electric energy generated by renewable energy sources;
the energy release process comprises the following steps: liquid carbon dioxide stored in the second liquid carbon dioxide storage tank is conveyed into the fourth heater through the fifth pump to exchange heat with the heat storage medium, and the heat storage medium after releasing heat is stored in the third cold tank; the carbon dioxide with the increased temperature enters a third expansion machine to do work so as to drive a generator to generate electric energy; the medium after absorbing heat is stored in the second heat tank, the cooled carbon dioxide is liquefied through adjusting the first expansion machine to realize phase change in the cold storage device, and the liquid carbon dioxide generated by liquefaction is stored in the first liquid carbon dioxide storage tank.
Compared with the prior art, the invention has the following beneficial effects:
in order to overcome the defects of the compressed air energy storage technology, the invention adopts carbon dioxide to replace air as an energy storage medium, on one hand, the carbon dioxide is nontoxic and does not support combustion, and has lower critical temperature (31.3 ℃) and critical pressure (7.38 MPa); on the other hand, the high-pressure supercritical carbon dioxide can be condensed into liquid at ambient temperature, the volume is obviously reduced, and the possibility of getting rid of the limit of specific storage conditions is provided. In summary, the invention provides a liquefied carbon dioxide energy storage system using carbon dioxide as an energy storage medium, which not only can more flexibly use an artificial container and improve the energy density of the system, but also can form a closed loop to avoid releasing greenhouse gases to the environment. The liquefied carbon dioxide energy storage system provided by the embodiment of the invention adopts two liquid carbon dioxide storage tanks with different pressures, which are respectively used for storing high-pressure carbon dioxide liquid and low-pressure carbon dioxide liquid, so that the system forms a closed energy storage system, on one hand, carbon dioxide working medium can be recycled, and on the other hand, greenhouse gas emission to the environment is avoided. In the invention, carbon dioxide is used as a working medium, the critical state is easily reached under lower pressure, compared with the method of using air, the liquefaction is easier to realize by using the current feasible measures, and an artificial container can be used as a liquid carbon dioxide storage tank in practical application, so that the storage volume of an energy storage system is effectively reduced, the limitation to special geographic environment is eliminated, and the energy storage density of the system is increased.
According to the liquefied carbon dioxide energy storage system disclosed by the invention, high-pressure supercritical carbon dioxide can be condensed into liquid at any ambient temperature in the energy storage process, and in the energy release process, the carbon dioxide at the outlet of the low-pressure expansion machine can realize that the heat exchange processes of two streams of fluid in the cold accumulator are pure phase change processes by adjusting the expansion machine, so that the problems of huge equipment and complex design caused by both latent heat exchange and sensible heat exchange in the heat exchanger are solved.
In the invention, a second radiator is arranged behind the outlet of the cold end of the third heater and is used for cooling the carbon dioxide gas to the ambient temperature, thereby avoiding the phenomenon that the temperature of the carbon dioxide entering the low-pressure compressor 1 is too high and the power consumption of the compressor is increased.
In the present invention, the temperature of the carbon dioxide gas at the outlet of the third expander is higher than the ambient temperature, so a first radiator is installed after the third expander for cooling the carbon dioxide to the ambient temperature.
The system of the invention can realize frequency modulation of the power grid, peak clipping and valley filling, and increase the utilization rate of renewable energy. The system takes electric energy as an energy source for driving the compressor in the energy storage stage, adopts carbon dioxide as an energy storage medium, utilizes the energy storage device to recover heat carried by a carbon dioxide working medium in the energy storage process, and stores the obtained liquid carbon dioxide in the artificial container, so that the system has the advantages of economy, high efficiency and environmental protection, and simultaneously solves the problem of low energy density of the system. In the invention, surplus electric energy of a power grid in a power utilization peak period or electric energy generated by renewable energy is used as an energy source in a system energy storage stage, the expander is used for acting to drive the generator to generate electric energy in an energy release stage so as to supplement power supply of the power grid in the power utilization peak period, the power supply pressure in the power grid power supply peak period can be transferred to the power supply peak period, the wind and electricity abandoning rate of the renewable energy can be reduced, and the energy can be saved.
In the application of the invention, the low-temperature expander is adopted to liquefy the carbon dioxide at the hot end outlet of the three-stream cooler in the energy storage process, and the expander is adopted to adjust the state of the carbon dioxide at the outlet of the cooler in the energy release process so as to meet the working requirement of the cold accumulator. Preferably, a heat sink is employed for regulating the temperature of the carbon dioxide gas down to ambient temperature. Preferably, the motor is used for driving the multi-stage compressor in the energy storage process, and the multi-stage expander is used for driving and connecting the generator in the energy release process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below; it is obvious that the drawings in the following description are some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic diagram of a liquefied carbon dioxide energy storage system according to an embodiment of the invention;
FIG. 2 is a schematic diagram of yet another liquefied carbon dioxide energy storage device in accordance with an embodiment of the present invention;
in fig. 1 and 2, 1, a first compressor; 2. a first cooler; 3. a second compressor; 4. a second cooler; 5. a first pump; 6. a first hot tank; 7. a first cold tank; 8. a second pump; 9. a first heat sink; 10. a first heater; 11. a first expander; 12. a second expander; 13. a second heater; 14. a third expander; 15. a regenerator; 16. a throttle valve; 17. A first liquid carbon dioxide storage tank; 18. a third pump; 19. a second cold tank; 20. a third cooler; 21. a third heater; 22. A fourth pump; 23. a second hot tank; 24. a fourth heater; 25. a fifth pump; 26. a third cold tank; 27. a second liquid carbon dioxide storage tank; 28. a sixth pump; 29. a third hot tank; 30. a separator; 31. a fourth expander; 32. a fourth cooler; 33. A second heat sink; 34. and a seventh pump.
Detailed Description
In order to make the purpose, technical effect and technical solution of the embodiments of the present invention clearer, the following clearly and completely describes the technical solution of the embodiments of the present invention with reference to the drawings in the embodiments of the present invention; it is to be understood that the described embodiments are only some of the embodiments of the present invention. Other embodiments, which can be derived by one of ordinary skill in the art from the disclosed embodiments without inventive faculty, are intended to be within the scope of the invention.
Referring to fig. 1, a liquefied carbon dioxide energy storage system according to an embodiment of the present invention includes: a first compressor 1, a first cooler 2, a first hot tank 6, a first cold tank 7, a second heater 13, a first expander 11, a third expander 14, a cold storage 15, a throttle valve 16, a first liquid carbon dioxide storage tank 17, a second cold tank 19, a third cooler 20, a third heater 21, a second hot tank 23, a fourth heater 24, a fifth pump 25, a third cold tank 26, a second liquid carbon dioxide storage tank 27, a third hot tank 29, a separator 30, a fourth expander 31, and a fourth cooler 32; the outlet of the first compressor 1 communicates with the first inlet of the first cooler 2, and the first outlet of the first cooler 2 communicates with the first inlet of the fourth cooler 32; the second inlet of the first cooler 2 is communicated with the outlet of the first cold tank 7, and the second outlet of the first cooler 2 is communicated with the inlet of the first hot tank 6; the outlet of the first hot tank 6 is communicated with the first inlet of the second heater 13, and the first outlet of the second heater 13 is communicated with the inlet of the first cold tank 7; a second inlet of the fourth cooler 32 communicates with the outlet of the third cold tank 26, and a second outlet of the fourth cooler 32 communicates with the inlet of the third hot tank 29; the outlet of the third hot tank 29 is in communication with the first inlet of the fourth heater 24, and the first outlet of the fourth heater 24 is in communication with the inlet of the third cold tank 26; a first outlet of the fourth cooler 32 communicates with an inlet of a fourth expander 31, an outlet of the fourth expander 31 communicates with an inlet of the separator 30; the first outlet of the separator 30 communicates with a third inlet of a fourth cooler 32, the third outlet of the fourth cooler 32 communicating with the inlet of the first compressor 1; a second outlet of the separator 30 is communicated with an inlet of a second liquid carbon dioxide storage tank 27, an outlet of the second liquid carbon dioxide storage tank 27 is communicated with a second inlet of a fourth heater 24 through a fifth pump 25, and a second outlet of the fourth heater 24 is communicated with a second inlet of the second heater 13; an inlet of the third expansion machine 14 is communicated with a second outlet of the second heater 13, an outlet of the third expansion machine 14 is communicated with a first inlet of a third cooler 20, a first outlet of the third cooler 20 is communicated with an inlet of the first expansion machine 11, an outlet of the first expansion machine 11 is communicated with a first inlet of a cold accumulator 15, a first outlet of the cold accumulator 15 is communicated with an inlet of a first liquid carbon dioxide storage tank 17, and an outlet of the first liquid carbon dioxide storage tank 17 is communicated with a second inlet of the cold accumulator 15 through a throttle valve 16; a second outlet of the cold accumulator 15 is communicated with a first inlet of a third heater 21, and a first outlet of the third heater 21 is communicated with an inlet of the first compressor 1; a second outlet of the third heater 21 is communicated with an inlet of the second cold tank 19, an outlet of the second cold tank 19 is communicated with a second inlet of the third cooler 20, a second outlet of the third cooler 20 is communicated with an inlet of the second hot tank 23, and an outlet of the second hot tank 23 is communicated with a second inlet of the third heater 21; wherein the circulating medium of the liquefied carbon dioxide energy storage system is carbon dioxide; the first liquid carbon dioxide tank 17 is at a different pressure than the second liquid carbon dioxide tank 27.
In the embodiment of the invention, the method further comprises the following steps: a second compressor 3, a second cooler 4, a first heater 10, and a second expander 12;
the second compressor 3 is arranged coaxially with the first compressor 1; the inlet of the second compressor 3 is communicated with the first outlet of the first cooler 2, the outlet of the second compressor 3 is communicated with the first inlet of the second cooler 4, and the first outlet of the second cooler 4 is communicated with the first inlet of the fourth cooler 32; a second outlet of the second cooler 4 is communicated with an inlet of the first hot tank 6, and a second inlet of the second cooler 4 is communicated with an outlet of the first cold tank 7; the second expander 12 is arranged coaxially with the third expander 14; a first inlet of the first heater 10 is communicated with an outlet of the first hot tank 6, and a first outlet of the first heater 10 is communicated with an inlet of the first cold tank 7; the second inlet of the first heater 10 communicates with the second outlet of the fourth heater 24, the second outlet of the first heater 10 communicates with the inlet of the second expander 12, and the outlet of the second expander 12 communicates with the second inlet of the second heater 13.
In the embodiment of the invention, the method further comprises the following steps: a first radiator 9, a second radiator 33;
the first radiator 9 is disposed between the outlet of the third expander 14 and the first inlet of the third cooler 20; the second radiator 33 is disposed between the inlet of the first compressor 1, the third outlet of the fourth cooler 32, and the first outlet of the third heater 21.
In the embodiment of the invention, a first pump 5 is arranged between the first cooler 2 and the first cold tank 7; a second pump 8 is arranged between the first hot tank 6 and the second heater 13; a third pump 18 is arranged between the second cold tank 19 and the third cooler 20; a fourth pump 22 is provided between the second hot tank 23 and the third heater 21; a sixth pump 28 is arranged between the third cold tank 26 and the fourth cooler 32; a seventh pump 34 is provided between the third hot tank 29 and the fourth heater 24.
Referring to fig. 2, a liquefied carbon dioxide energy storage system according to an embodiment of the present invention includes: the energy storage device comprises an energy storage unit, an energy release unit, a first energy storage device A, a second energy storage device B and a third energy storage device C; the system operates in two modes of energy storage and energy release, and three energy storage devices and a liquid carbon dioxide storage tank in the system connect the two modes into a whole.
In an embodiment of the present invention, the energy storage unit includes: the system comprises a first liquid carbon dioxide storage tank, a throttle valve, a heater, a radiator, a low-pressure compressor, a low-pressure cooler, a high-pressure compressor, a second cooler, a low-temperature expander, a separator and a second liquid carbon dioxide storage tank which are sequentially communicated through pipelines; the energy release unit comprises: the low-temperature pump, the heater, the high-pressure expander, the low-pressure heater, the low-pressure expander, the radiator, the cooler, the expander, the cold accumulator and the first liquid carbon dioxide storage tank are sequentially communicated through pipelines. The energy storage device includes: the cold tank, the pump, the cooler, the heater, the pump and the cold tank which are connected in sequence through pipelines form a closed loop. The energy storage process comprises the following steps: the heat storage medium in the hot tank of the energy storage device C heats the carbon dioxide gas at the outlet of the cold end of the cold storage device in the heater, the heat storage medium in the cold tank of the energy storage device A recovers the compression heat generated by the compressor in the low-pressure cooler and the second cooler and stores the compression heat in the hot tank, and the heat storage medium in the cold tank of the energy storage device B cools the carbon dioxide at the outlet of the second cooler in the second cooler and stores the heat in the hot tank. The energy release process of the system of the embodiment of the invention comprises the following steps: the heat stored in the hot tank in the energy storage device B is used for heating the carbon dioxide at the outlet of the second liquid carbon dioxide storage tank, the heat stored in the hot tank in the energy storage device A is respectively used for heating the carbon dioxide at the inlet of the expansion machine in the high-pressure heater and the low-pressure heater, and the heat storage medium in the cold tank of the energy storage device C is used for cooling the carbon dioxide at the ambient temperature at the outlet of the radiator in the cooler.
The liquefied carbon dioxide energy storage system provided by the embodiment of the invention adopts two liquid carbon dioxide storage tanks with different pressures, which are respectively used for storing high-pressure carbon dioxide liquid and low-pressure carbon dioxide liquid, so that the system forms a closed energy storage system, on one hand, carbon dioxide working medium can be recycled, and on the other hand, greenhouse gas emission to the environment is avoided.
The energy storage device A of the embodiment of the invention adopts water as a heat storage medium, the energy storage device B, C adopts methanol as a heat storage medium, and the outlets of a hot tank and a cold tank in the energy storage device are provided with pumps for conveying heat storage fluid instead of raising the working pressure of the fluid.
Preferably, a three-stream cooler is adopted in the energy storage device B, and a cold-end inlet is respectively introduced into the low-temperature carbon dioxide gas at the top outlet of the separator and the methanol at the outlet of the cold tank to serve as cold-stream working fluid.
Preferably, a low-temperature expansion machine is adopted to liquefy carbon dioxide at the outlet of the hot end of the three-strand cooler in the energy storage process, and the expansion machine is adopted to adjust the state of the carbon dioxide at the outlet of the cooler in the energy release process so as to meet the working requirement of the cold accumulator.
Preferably, a heat sink is employed for regulating the temperature of the carbon dioxide gas down to ambient temperature.
Preferably, the motor is used for driving the multi-stage compressor in the energy storage process, and the multi-stage expander is used for driving and connecting the generator in the energy release process.
The system of the embodiment of the invention is an energy storage system which can be used for smooth renewable energy intermittent power generation and power grid peak shaving. The invention takes surplus electric energy of a power grid in a power utilization peak period or electric energy generated by renewable energy as an energy source in the energy storage stage of the system, and drives a generator to generate electric energy to supplement power supply of the power grid in the power utilization peak period by applying work through an expansion machine in the energy release stage. Therefore, the power supply pressure in the power supply peak period of the power grid is transferred to the power supply low peak period, the wind and electricity abandoning rate of renewable energy sources is reduced, and the energy sources are saved. The invention adopts carbon dioxide as a working medium, can easily reach a critical state under lower pressure, is easier to realize liquefaction compared with the method adopting air by utilizing the current feasible measures, and can effectively reduce the storage volume of an energy storage system by using an artificial container as a liquid carbon dioxide storage tank in practical application, thereby getting rid of the limitation on special geographic environment and increasing the energy storage density of the system. According to the liquefied carbon dioxide energy storage system disclosed by the invention, high-pressure supercritical carbon dioxide can be condensed into liquid at any ambient temperature in the energy storage process, and in the energy release process, the carbon dioxide at the outlet of the low-pressure expansion machine can realize that the heat exchange processes of two streams of fluid in the cold accumulator are pure phase change processes by adjusting the expansion machine, so that the problems of huge equipment and complex design caused by both latent heat exchange and sensible heat exchange in the heat exchanger are solved.
The liquefied carbon dioxide energy storage system provided by the invention mainly operates in two modes of energy storage and energy release.
In the energy storage process, the low-pressure liquid carbon dioxide stored in the first liquid carbon dioxide storage tank flows through the throttle valve and enters the cold accumulator, the temperature of the heat exchange medium in the cold accumulator is higher than that of the liquid carbon dioxide, and the carbon dioxide absorbs heat and is converted from a liquid state to a gaseous state in the process. Gaseous carbon dioxide at the cold end outlet of the cold accumulator flows through a heater in the energy storage device C to absorb heat stored in the energy release process of the thermal storage medium methanol from the thermal tank, and it is worth mentioning that the temperature of the heated gaseous carbon dioxide is higher than the ambient temperature, so that a radiator is arranged behind the cold end outlet of the heater to cool the carbon dioxide gas to the ambient temperature, and the phenomenon that the temperature of the carbon dioxide entering the low-pressure compressor is too high to increase the power consumption of the compressor is avoided. And the carbon dioxide at the ambient temperature at the outlet of the radiator enters a low-pressure compressor, is compressed, heated and pressurized and then enters a low-pressure cooler, heat exchange is carried out between the carbon dioxide and heat-carrying medium water from a cold tank in the energy storage device A in the low-pressure cooler, the heat-carrying medium water absorbing the compression heat is stored in a hot tank, and the cooled carbon dioxide enters a high-pressure compressor for pressurization again. The carbon dioxide with the increased temperature and pressure enters a second cooler to exchange heat with heat-carrying medium water from a cold tank in the energy storage device A, and the heat-carrying medium water absorbing the compression heat is stored in a hot tank. Supercritical carbon dioxide gas at the outlet of the cold end of the second cooler enters the cooler in the energy storage device B and is simultaneously cooled by heat-carrying medium methanol from the cold tank in the energy storage device B and carbon dioxide at the outlet of the top end of the separator, the heat-carrying medium methanol after absorbing heat is stored in the hot tank, and the supercritical carbon dioxide after heat exchange and cooling enters the low-temperature expansion machine for liquefaction. And separating the carbon dioxide gas-liquid mixture generated in the liquefaction process in a separator, storing the high-pressure liquid carbon dioxide obtained by separation in a second liquid carbon dioxide storage tank, and cooling the supercritical carbon dioxide from the outlet at the cold end of the second cooler by the gaseous carbon dioxide obtained by separation in an energy storage device B. In the energy storage process, the energy consumed by the compressor can be surplus electric energy of a power grid during a power utilization peak period or electric energy generated by renewable energy sources.
In the energy release process, high-pressure liquid carbon dioxide stored in the second liquid carbon dioxide storage tank is conveyed to the heater of the energy storage device B through the pump to exchange heat with the heat storage medium methanol, the heat storage medium methanol after releasing heat is stored in the cold tank for use in the next energy storage stage, and the heated carbon dioxide enters the high-pressure heater to be heated again by the heat storage medium water so as to improve the work-doing capacity of the carbon dioxide. The heat storage medium water after releasing heat is stored in the cold tank for the next energy storage stage, carbon dioxide after two-stage heating enters the high-pressure expander to do work to drive the generator to generate electric energy, carbon dioxide gas at the outlet of the expander enters the low-pressure heater to be heated again by the heat storage medium water, and the carbon dioxide after temperature rising enters the low-pressure expander to do work to drive the generator to generate electric energy. Since the carbon dioxide gas temperature at the outlet of the low pressure expander is higher than ambient temperature, a radiator is installed after the low pressure expander for cooling the carbon dioxide to ambient temperature. And the ambient temperature carbon dioxide at the outlet of the radiator enters a cooler in the energy storage device C to exchange heat with heat-carrying medium methanol, the methanol absorbing heat is stored in a hot tank for the next energy storage stage, the cooled carbon dioxide is liquefied by adjusting an expansion machine to realize phase change in a cold accumulator, and the liquefied carbon dioxide is stored in a first liquid carbon dioxide storage tank for the next energy storage stage.
The invention is composed of two modes of energy storage and energy release, in the energy storage process, redundant electric energy in the peak-valley period of a power grid or electric energy generated by renewable energy is stored in other forms of energy, the stored energy is released in the peak-peak period of power utilization to supplement power supply of the power grid, and the purpose of frequency modulation of the power grid is further realized in a peak clipping and valley filling mode. The liquefied carbon dioxide energy storage system can be used for matching with a power grid to realize peak clipping and valley filling and power grid frequency modulation, and for areas rich in renewable energy, the liquefied carbon dioxide energy storage system can be matched with a renewable energy power plant to increase the utilization rate of the renewable energy, so that the purpose of saving energy is achieved.
In summary, the present invention is directed to overcome the disadvantages of the compressed air energy storage technology, and provides a liquefied carbon dioxide energy storage system and method, so as to realize frequency modulation and peak load shifting of a power grid, and increase the utilization rate of renewable energy. The system takes the surplus electric energy of the power grid in the electricity utilization low peak period or the electric energy generated by renewable energy as an energy source for driving the compressor in the energy storage stage, adopts carbon dioxide as an energy storage medium, utilizes an energy storage device to recover heat carried by a carbon dioxide working medium in the energy storage process, and stores the obtained liquid carbon dioxide in an artificial container, so that the system has the advantages of economy, high efficiency and environmental protection, and simultaneously solves the problem of low energy density of the system.
Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can make modifications and equivalents to the embodiments of the present invention without departing from the spirit and scope of the present invention, which is set forth in the claims of the present application.

Claims (10)

1. A liquefied carbon dioxide energy storage system, comprising: the system comprises a first compressor (1), a first cooler (2), a first hot tank (6), a first cold tank (7), a second heater (13), a first expander (11), a third expander (14), a cold storage device (15), a throttle valve (16), a first liquid carbon dioxide storage tank (17), a second cold tank (19), a third cooler (20), a third heater (21), a second hot tank (23), a fourth heater (24), a fifth pump (25), a third cold tank (26), a second liquid carbon dioxide storage tank (27), a third hot tank (29), a separator (30), a fourth expander (31) and a fourth cooler (32);
the outlet of the first compressor (1) is communicated with the first inlet of the first cooler (2), and the first outlet of the first cooler (2) is communicated with the first inlet of the fourth cooler (32); a second inlet of the first cooler (2) is communicated with an outlet of the first cold tank (7), and a second outlet of the first cooler (2) is communicated with an inlet of the first hot tank (6); the outlet of the first hot tank (6) is communicated with the first inlet of the second heater (13), and the first outlet of the second heater (13) is communicated with the inlet of the first cold tank (7);
a second inlet of the fourth cooler (32) is communicated with an outlet of the third cold tank (26), and a second outlet of the fourth cooler (32) is communicated with an inlet of the third hot tank (29); the outlet of the third hot tank (29) is communicated with the first inlet of the fourth heater (24), and the first outlet of the fourth heater (24) is communicated with the inlet of the third cold tank (26);
the first outlet of the fourth cooler (32) is communicated with the inlet of a fourth expansion machine (31), and the outlet of the fourth expansion machine (31) is communicated with the inlet of the separator (30); the first outlet of the separator (30) is communicated with the third inlet of the fourth cooler (32), and the third outlet of the fourth cooler (32) is communicated with the inlet of the first compressor (1); a second outlet of the separator (30) is communicated with an inlet of a second liquid carbon dioxide storage tank (27), an outlet of the second liquid carbon dioxide storage tank (27) is communicated with a second inlet of a fourth heater (24) through a fifth pump (25), and a second outlet of the fourth heater (24) is communicated with a second inlet of the second heater (13);
an inlet of a third expansion machine (14) is communicated with a second outlet of the second heater (13), an outlet of the third expansion machine (14) is communicated with a first inlet of a third cooler (20), a first outlet of the third cooler (20) is communicated with an inlet of a first expansion machine (11), an outlet of the first expansion machine (11) is communicated with a first inlet of a cold accumulator (15), a first outlet of the cold accumulator (15) is communicated with an inlet of a first liquid carbon dioxide storage tank (17), and an outlet of the first liquid carbon dioxide storage tank (17) is communicated with a second inlet of the cold accumulator (15) through a throttle valve (16); a second outlet of the cold accumulator (15) is communicated with a first inlet of a third heater (21), and a first outlet of the third heater (21) is communicated with an inlet of the first compressor (1);
a second outlet of the third heater (21) is communicated with an inlet of the second cold tank (19), an outlet of the second cold tank (19) is communicated with a second inlet of the third cooler (20), a second outlet of the third cooler (20) is communicated with an inlet of the second hot tank (23), and an outlet of the second hot tank (23) is communicated with a second inlet of the third heater (21);
wherein the circulating medium of the liquefied carbon dioxide energy storage system is carbon dioxide; the first liquid carbon dioxide tank (17) and the second liquid carbon dioxide tank (27) have different pressures.
2. The liquefied carbon dioxide energy storage system of claim 1, further comprising: a second compressor (3) and a second cooler (4);
the second compressor (3) is arranged coaxially with the first compressor (1);
the inlet of the second compressor (3) is communicated with the first outlet of the first cooler (2), the outlet of the second compressor (3) is communicated with the first inlet of the second cooler (4), and the first outlet of the second cooler (4) is communicated with the first inlet of the fourth cooler (32); the second outlet of the second cooler (4) is communicated with the inlet of the first hot tank (6), and the second inlet of the second cooler (4) is communicated with the outlet of the first cold tank (7).
3. The liquefied carbon dioxide energy storage system of claim 1, further comprising: a first heater (10) and a second expander (12);
the second expander (12) is arranged coaxially with the third expander (14);
a first inlet of the first heater (10) is communicated with an outlet of the first hot tank (6), and a first outlet of the first heater (10) is communicated with an inlet of the first cold tank (7); the second inlet of the first heater (10) is communicated with the second outlet of the fourth heater (24), the second outlet of the first heater (10) is communicated with the inlet of the second expansion machine (12), and the outlet of the second expansion machine (12) is communicated with the second inlet of the second heater (13).
4. The liquefied carbon dioxide energy storage system of claim 1, further comprising: a first radiator (9);
the first radiator (9) is disposed between an outlet of the third expander (14) and a first inlet of the third cooler (20).
5. The liquefied carbon dioxide energy storage system of claim 1, further comprising: a second radiator (33);
the second radiator (33) is disposed between an inlet of the first compressor (1), a third outlet of the fourth cooler (32), and a first outlet of the third heater (21).
6. Liquefied carbon dioxide energy storage system according to claim 1, wherein the first cooler (2), the first hot tank (6), the first cold tank (7) and the second heater (13) constitute an energy storage device, and water is used as a heat storage medium.
7. Liquefied carbon dioxide energy storage system according to claim 1, wherein the medium in the second hot tank (23), the second cold tank (19), the third hot tank (29) and the third cold tank (26) is methanol.
8. Use of the liquefied carbon dioxide energy storage system according to claim 1 as an energy storage system for intermittent power generation and grid peak shaving as a smooth renewable energy source.
9. Use according to claim 8, wherein the energy storage process comprises: liquid carbon dioxide stored in a first liquid carbon dioxide storage tank (17) flows through a throttle valve (16) and enters a cold accumulator (15), the temperature of a heat exchange medium in the cold accumulator (15) is higher than that of the liquid carbon dioxide, and the heat absorbed by the carbon dioxide is converted from a liquid state to a gaseous state; gaseous carbon dioxide at the cold end outlet of the cold accumulator (15) flows through the third heater (21) and absorbs the heat stored in the heat storage medium from the second heat tank (23) in the energy release process; the method comprises the following steps that carbon dioxide with the ambient temperature enters a first compressor (1), enters a first cooler (2) after being compressed, heated and pressurized, exchanges heat with a heat-carrying medium from a first cold tank (7) in the first cooler (2), and stores the heat-carrying medium after absorbing the compression heat in a first hot tank (6); supercritical carbon dioxide gas at the outlet of the cold end of the first cooler (2) enters a fourth cooler (32) and is cooled by heat-carrying medium from a third cold tank (26) and carbon dioxide at the first outlet of a separator (30), the heat-carrying medium absorbing heat is stored in a third hot tank (29), and the supercritical carbon dioxide after heat exchange and cooling enters a fourth expander (31) for liquefaction; separating a carbon dioxide gas-liquid mixture generated in the liquefaction process in a separator (30), storing the separated liquid carbon dioxide in a second liquid carbon dioxide storage tank (27), and cooling the supercritical carbon dioxide from the outlet of the cold end of the first cooler (2) by the separated gaseous carbon dioxide in a fourth cooler (32); in the energy storage process, the energy consumed by the compressor is surplus electric energy of a power grid in the electricity utilization low peak period or electric energy generated by renewable energy sources.
10. The use of claim 8, wherein the energy release process comprises: liquid carbon dioxide stored in the second liquid carbon dioxide storage tank (27) is conveyed into the fourth heater (24) through the fifth pump (25) to exchange heat with the heat storage medium, and the heat storage medium after heat release is stored in the third cold tank (26); the carbon dioxide with the increased temperature enters a third expansion machine (14) to do work and is used for driving a generator to generate electric energy; the medium absorbing heat is stored in a second hot tank (23), the cooled carbon dioxide is liquefied by adjusting a first expansion machine (11) to realize phase change in a cold storage device (15), and liquid carbon dioxide generated by liquefaction is stored in a first liquid carbon dioxide storage tank (17).
CN202011317804.6A 2020-11-23 2020-11-23 Liquefied carbon dioxide energy storage system and application thereof Pending CN112325497A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011317804.6A CN112325497A (en) 2020-11-23 2020-11-23 Liquefied carbon dioxide energy storage system and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011317804.6A CN112325497A (en) 2020-11-23 2020-11-23 Liquefied carbon dioxide energy storage system and application thereof

Publications (1)

Publication Number Publication Date
CN112325497A true CN112325497A (en) 2021-02-05

Family

ID=74322036

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011317804.6A Pending CN112325497A (en) 2020-11-23 2020-11-23 Liquefied carbon dioxide energy storage system and application thereof

Country Status (1)

Country Link
CN (1) CN112325497A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112985145A (en) * 2021-02-07 2021-06-18 深圳市博德维环境技术股份有限公司 Energy storage device and method based on carbon dioxide gas-liquid phase change
CN112985143A (en) * 2021-02-07 2021-06-18 深圳市博德维环境技术股份有限公司 Based on CO2Multistage compression energy storage device for converting heat energy into mechanical energy through gas-liquid phase change
CN112985142A (en) * 2021-02-07 2021-06-18 深圳市博德维环境技术股份有限公司 Heat energy conversion mechanical energy storage device based on carbon dioxide gas-liquid phase change
CN114198170A (en) * 2021-12-09 2022-03-18 西安交通大学 Carbon dioxide energy storage system based on double heat storage loops and working method thereof
CN114321697A (en) * 2021-11-17 2022-04-12 中国电建集团海外投资有限公司 Energy storage system and device based on compressed liquid carbon dioxide application
CN114877737A (en) * 2022-05-12 2022-08-09 西安交通大学 Liquid carbon dioxide energy storage system and method based on flash evaporation and ejector
WO2023019868A1 (en) * 2021-08-16 2023-02-23 中国华能集团清洁能源技术研究院有限公司 Carbon capturing and peak shaving coupling apparatus and method
CN116242054A (en) * 2023-03-14 2023-06-09 大连理工大学 Liquid CO based on phase change direct refrigeration 2 Combined cooling, heating and power energy storage system
CN116388405A (en) * 2023-06-07 2023-07-04 势加透博(河南)能源科技有限公司 System and method for integrating carbon dioxide seal and energy storage power generation
CN116591794A (en) * 2023-04-18 2023-08-15 北京博睿鼎能动力科技有限公司 Liquid carbon dioxide energy storage power generation system
CN116780783A (en) * 2023-08-16 2023-09-19 势加透博(河南)能源科技有限公司 Carbon dioxide trapping energy storage system and control method
CN117450683A (en) * 2023-12-21 2024-01-26 势加透博（上海）能源科技有限公司 Nested energy storage system

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022166391A1 (en) * 2021-02-07 2022-08-11 百穰新能源科技(深圳)有限公司 Co2 gas-liquid phase transition-based multistage compression energy storage apparatus for converting thermal energy into mechanical energy
CN112985143A (en) * 2021-02-07 2021-06-18 深圳市博德维环境技术股份有限公司 Based on CO2Multistage compression energy storage device for converting heat energy into mechanical energy through gas-liquid phase change
CN112985142A (en) * 2021-02-07 2021-06-18 深圳市博德维环境技术股份有限公司 Heat energy conversion mechanical energy storage device based on carbon dioxide gas-liquid phase change
CN112985143B (en) * 2021-02-07 2022-01-14 百穰新能源科技(深圳)有限公司 CO2 gas-liquid phase change-based multistage compression energy storage device for converting heat energy into mechanical energy
CN112985145A (en) * 2021-02-07 2021-06-18 深圳市博德维环境技术股份有限公司 Energy storage device and method based on carbon dioxide gas-liquid phase change
WO2023019868A1 (en) * 2021-08-16 2023-02-23 中国华能集团清洁能源技术研究院有限公司 Carbon capturing and peak shaving coupling apparatus and method
CN114321697A (en) * 2021-11-17 2022-04-12 中国电建集团海外投资有限公司 Energy storage system and device based on compressed liquid carbon dioxide application
CN114198170B (en) * 2021-12-09 2022-11-04 西安交通大学 Carbon dioxide energy storage system based on double heat storage loops and working method thereof
CN114198170A (en) * 2021-12-09 2022-03-18 西安交通大学 Carbon dioxide energy storage system based on double heat storage loops and working method thereof
CN114877737A (en) * 2022-05-12 2022-08-09 西安交通大学 Liquid carbon dioxide energy storage system and method based on flash evaporation and ejector
CN114877737B (en) * 2022-05-12 2023-01-10 西安交通大学 Liquid carbon dioxide energy storage system and method based on flash evaporation and ejector
CN116242054A (en) * 2023-03-14 2023-06-09 大连理工大学 Liquid CO based on phase change direct refrigeration 2 Combined cooling, heating and power energy storage system
CN116591794A (en) * 2023-04-18 2023-08-15 北京博睿鼎能动力科技有限公司 Liquid carbon dioxide energy storage power generation system
CN116388405A (en) * 2023-06-07 2023-07-04 势加透博(河南)能源科技有限公司 System and method for integrating carbon dioxide seal and energy storage power generation
CN116388405B (en) * 2023-06-07 2023-08-29 势加透博(河南)能源科技有限公司 System and method for integrating carbon dioxide seal and energy storage power generation
CN116780783A (en) * 2023-08-16 2023-09-19 势加透博(河南)能源科技有限公司 Carbon dioxide trapping energy storage system and control method
CN116780783B (en) * 2023-08-16 2024-01-26 势加透博(河南)能源科技有限公司 Carbon dioxide trapping energy storage system and control method
CN117450683A (en) * 2023-12-21 2024-01-26 势加透博（上海）能源科技有限公司 Nested energy storage system
CN117450683B (en) * 2023-12-21 2024-03-26 势加透博（上海）能源科技有限公司 Nested energy storage system

Similar Documents

Publication Publication Date Title
CN112325497A (en) Liquefied carbon dioxide energy storage system and application thereof
CN110374838B (en) Transcritical carbon dioxide energy storage system and method based on LNG (liquefied Natural gas) cold energy utilization
CN110578567B (en) Compressed air constant-pressure energy storage power generation system utilizing working medium phase change
CN108533476A (en) A kind of heat pump supercritical air energy storage system
CN114198170B (en) Carbon dioxide energy storage system based on double heat storage loops and working method thereof
CN109826682B (en) Integrated energy supply system capable of realizing combined supply of cold, heat and electricity
CN110905747B (en) Combined power cycle power generation system utilizing high-temperature solar energy and LNG cold energy
CN111022139A (en) Coal-fired generating set coupling liquefied air energy storage power generation system
WO2023193486A1 (en) Normal-temperature liquid compressed carbon dioxide mixed working fluid energy storage system and method
CN113339090B (en) Brayton-organic Rankine cycle type energy storage and power supply method and device
CN105736056B (en) Liquid air energy storage system
CN112901299A (en) Supercritical CO with electric heat energy storage2Brayton cycle power generation system and method
CN111173719A (en) Liquefied air energy storage system with preheating evaporator
CN215762153U (en) Low-temperature power generation comprehensive energy system capable of fully utilizing cold heat energy and efficiently storing energy
CN114033517B (en) Geothermal power generation and cold and hot supply system based on carbon dioxide compression energy storage and operation method
CN114856738A (en) Combined cooling heating and power energy storage system and method based on liquid carbon dioxide storage
CN113700628A (en) Multi-connected liquid supply air energy storage system and optimization control method
CN216198343U (en) Compressed carbon dioxide energy storage system
CN214660402U (en) Supercritical CO with electric heat energy storage2Brayton cycle power generation system
CN213631046U (en) Liquefied carbon dioxide energy storage device
CN213540514U (en) Liquid air energy storage system with self-absorption of compression heat
CN114704341A (en) Renewable energy comprehensive utilization system based on compressed carbon dioxide energy storage
CN210239766U (en) Utilize natural working medium to retrieve LNG cold energy power generation's device
CN112112694A (en) Liquid air energy storage system and method for self-absorption of compression heat
CN101749206B (en) Low-temperature liquefied energy recovery power supply system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination