CN114622960A - Transcritical carbon dioxide energy storage system - Google Patents
Transcritical carbon dioxide energy storage system Download PDFInfo
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- CN114622960A CN114622960A CN202210229569.XA CN202210229569A CN114622960A CN 114622960 A CN114622960 A CN 114622960A CN 202210229569 A CN202210229569 A CN 202210229569A CN 114622960 A CN114622960 A CN 114622960A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- 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
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
- H02J15/006—Systems for storing electric energy in the form of pneumatic energy, e.g. compressed air energy storage [CAES]
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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
- Y02E60/14—Thermal energy storage
Abstract
The invention provides a trans-critical carbon dioxide energy storage system, which comprises an energy storage loop unit and a heat storage loop unit; the energy storage loop unit comprises a liquid carbon dioxide storage tank, a cold accumulation heat exchanger, a compressor, a supercritical carbon dioxide storage tank and an expansion machine; the outlet of the liquid carbon dioxide storage tank is connected with the inlet of the supercritical carbon dioxide storage tank through the cold accumulation heat exchanger and the compressor; the outlet of the supercritical carbon dioxide storage tank is connected with the inlet of the liquid carbon dioxide storage tank through an expansion machine and a cold accumulation heat exchanger in sequence; the heat storage loop unit comprises a single-tank phase change packed bed heat accumulator, a cooler arranged between a compressor and a supercritical carbon dioxide storage tank, and a heater arranged between the supercritical carbon dioxide storage tank and an expander; the single-tank phase change packed bed heat accumulator and the cooler form a heat absorption circulation loop; single-tank phase-change packed bed heat accumulator and heater forming releaseA thermal circulation loop; the trans-critical carbon dioxide energy storage system can obviously reduce equipment investment, improve heat storage performance and reduce
And (4) loss.
Description
Technical Field
The invention relates to the technical field of physical energy storage. And more particularly, to a transcritical carbon dioxide energy storage system.
Background
In order to relieve the pressure of on-site consumption of renewable energy sources and grid connection of power generation, the development of efficient energy storage technical research has become an important consensus in the academic world and society. The existing electric energy storage technology comprises pumped storage, compressed air energy storage, carbon dioxide energy storage, battery energy storage, flywheel energy storage, superconducting energy storage, super capacitor energy storage and the like. The water pumping energy storage, the compressed air energy storage and the carbon dioxide energy storage are mainly suitable for large-scale energy storage application of hundreds of megawatts. The pumped storage geographical conditions are dislocated with the regions of wind energy and solar energy resources in China, and the objective problems of difficult site selection, long construction period, huge initial investment, ecological environment damage and the like exist; the compressed air energy storage technology has low energy storage density, needs a proper underground gas storage and is limited by certain geographical conditions. Carbon dioxide is more advantageous than using air as an energy storage medium. Because the supercritical carbon dioxide has the advantages of high density, good heat exchange performance and excellent flow characteristic, the transcritical carbon dioxide energy storage technology becomes a physical energy storage technology with better prospect and is suitable for the large-scale power energy storage application of more than hundred megawatts.
The heat storage subsystem is an important subsystem in the transcritical carbon dioxide energy storage system and is used for effectively recovering compression heat and providing expansion power generation reheating heat supply. However, most of the existing systems store compression heat directly through water for sensible heat, a high-low temperature water tank needs to be arranged, and the sensible heat storage and heat exchange coefficient is low, so that high-low temperature water storage equipment occupies a large area and has high investment, meanwhile, the water can change phase in the heat storage/release process, and single sensible heat storage cannot be well matched with a temperature-enthalpy curve of the water, so that the single sensible heat storage cannot be well matched with the temperature-enthalpy curve of the water, and the problem of high-low temperature water storage equipment is solved
The loss is large, and the efficiency of the system is not improved.
Disclosure of Invention
Aiming at the problems, the invention provides a transcritical carbon dioxide energy storage system, which combines a single-tank phase-change packed bed heat accumulator with the transcritical carbon dioxide energy storage system, and can remarkably reduce equipment investment, improve heat storage performance and reduce heat storage capacity
The problem that the heat storage cost is higher and the heat storage efficiency is low when the traditional double-tank sensible heat water is used is solved.
In order to realize the purpose, the invention adopts the following technical scheme:
the invention provides a transcritical carbon dioxide energy storage system, comprising:
the energy storage loop unit and the heat storage loop unit;
the energy storage loop unit comprises a liquid carbon dioxide storage tank, a cold accumulation heat exchanger, a compressor, a supercritical carbon dioxide storage tank and an expansion machine;
the outlet of the liquid carbon dioxide storage tank is connected with the inlet of the supercritical carbon dioxide storage tank through the evaporation side of the cold accumulation heat exchanger and the compressor;
an outlet of the supercritical carbon dioxide storage tank is connected with an inlet of the liquid carbon dioxide storage tank through an expansion machine and a condensation side of the cold accumulation heat exchanger in sequence;
the heat storage loop unit comprises a single-tank phase change packed bed heat accumulator, a cooler arranged between a compressor and a supercritical carbon dioxide storage tank, and a heater arranged between the supercritical carbon dioxide storage tank and an expander; the single-tank phase-change packed bed heat accumulator and the cooler form a heat absorption circulation loop; the single-tank phase-change packed bed heat accumulator and the heater form a heat release circulation loop.
In addition, preferably, the inlet of the cooler is connected with the outlet of a compressor, the inlet of the compressor is connected with the outlet of the evaporation side of the cold accumulation heat exchanger, and the outlet of the cooler is connected to the inlet of the supercritical carbon dioxide storage tank for energy storage; the cooler also comprises a heat absorption outlet and a heat absorption inlet, and the heat absorption outlet and the heat absorption inlet are both connected with the single-tank phase-change packed bed heat accumulator;
the outlet of the heater is connected with the inlet of an expander, the outlet of the expander is connected with the condensing side inlet of the cold accumulation heat exchanger, and the inlet of the heater is connected with the outlet of the supercritical carbon dioxide storage tank; the heater also comprises a heat release outlet and a heat release inlet, and the heat release outlet and the heat release inlet are both connected with the single-tank phase-change packed bed heat accumulator.
In addition, it is preferable that the single-tank phase-change packed bed regenerator includes a first port and a second port; the first interface is respectively connected with the heat absorption outlet and the heat release inlet; the second interface is respectively connected with the heat absorption inlet and the heat release outlet.
In addition, the single-tank phase change packed bed heat accumulator preferably comprises a shell with an inner cavity, a first interface and a second interface which are formed on the shell, and a heat accumulation material positioned in the inner cavity; the first interface and the second interface are both communicated with the inner cavity; the heat storage material is a packaged phase-change heat storage ball.
In addition, preferably, the single-tank phase change packed bed heat accumulator further comprises heat insulation cotton fixed outside the shell, a diffuser and a guide plate positioned in the shell, and a pressure gauge and a safety valve for regulating and controlling pressure.
In addition, preferably, the heat absorption circulation loop further comprises a heat absorption circulation pump for driving the heat exchange working medium to flow in the heat absorption circulation loop and a first valve group for controlling the on-off of the heat absorption circulation loop;
the heat release circulation loop also comprises a heat release circulation pump used for driving the heat exchange working medium to flow in the heat release circulation loop and a second valve set used for controlling the on-off of the heat release circulation loop.
In addition, preferably, the compressor is driven by renewable energy abandoned electricity, residual electricity of thermal power generation or electric network valley electricity to store energy;
the expander is connected with a generator for releasing energy.
Furthermore, it is preferable that the cooler and the heater are both shell-and-tube heat exchangers.
Furthermore, it is preferable that the compressor and the expander are of a centrifugal type, a screw type or a piston type;
the liquid carbon dioxide storage tank and the supercritical carbon dioxide storage tank are both steel storage tanks.
In addition, preferably, the energy storage loop unit further comprises a radiator positioned between the outlet of the expander and the condensation side inlet of the cold accumulation heat exchanger, a third valve used for reducing the pressure of the circulating working medium in the liquid carbon dioxide storage tank, and a fourth valve used for stabilizing the pressure of the circulating working medium in the supercritical carbon dioxide storage tank. The invention has the beneficial effects that:
1. the trans-critical carbon dioxide energy storage system provided by the invention uses liquid carbon dioxide and supercritical carbon dioxide for capacity storage, has the advantages of high energy storage density, small equipment occupation area and the like, and has a good application prospect in the fields of renewable energy consumption and thermal power unit energy storage peak regulation.
2. The heat storage unit of the transcritical carbon dioxide energy storage system provided by the invention adopts the single-tank phase-change packed bed heat accumulator, and has the advantages of large heat storage capacity, high heat storage density, small equipment volume and the like compared with double-tank water sensible heat storage, and has mature application experience. And two working conditions of heat storage and heat release can be freely regulated and controlled through the regulation of the pipeline valve, so that the consumption of excessive pipeline materials can be avoided, and the system is simpler.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic diagram of a single tank phase change packed bed regenerator of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The problem of use traditional two jar sensible heat water heat accumulation cost higher, heat accumulation inefficiency is solved. The invention provides a transcritical carbon dioxide energy storage system, which is shown in fig. 1 to 2, and specifically comprises: the energy storage loop unit and the heat storage loop unit; the energy storage loop unit comprises a liquid carbon dioxide storage tank 1, a cold accumulation heat exchanger 2, a compressor 3, a supercritical carbon dioxide storage tank 5 and an expansion machine 7; the cold storage heat exchanger 2 has an evaporation side and a condensation side, and as shown in fig. 1, the right side of the cold storage heat exchanger 2 is the evaporation side, and the left side is the condensation side; the outlet of the liquid carbon dioxide storage tank 1 is connected with the inlet of the supercritical carbon dioxide storage tank 5 through a pipeline, the evaporation side of the cold accumulation heat exchanger 2 and the compressor 3; an outlet of the supercritical carbon dioxide storage tank 5 is connected with an inlet of the liquid carbon dioxide storage tank 1 through pipelines sequentially passing through an expansion machine 7 and a condensation side of the cold accumulation heat exchanger 2; the heat storage loop unit comprises a single-tank phase change packed bed heat accumulator 9, a cooler 4 arranged between a compressor 3 and a supercritical carbon dioxide storage tank 5, and a heater 6 arranged between the supercritical carbon dioxide storage tank 5 and an expander 7; the single-tank phase change packed bed heat accumulator 9 is connected with the cooler 4 through a pipeline to form a heat absorption circulation loop; the single-tank phase-change packed bed heat accumulator 9 is connected with the heater 6 through a pipeline to form a heat release circulation loop, namely the cooler 4 is connected with the heater 6 in parallel. It can be understood that the circulating working medium in the energy storage loop unit is carbon dioxide; the heat exchange working medium in the heat storage unit is water and water vapor, and can also be heat conduction oil, methanol and other medium-low temperature heat storage and exchange liquid working media, and the invention is not limited to this.
In the above embodiment, more specifically, the inlet of the cooler 4 is connected with the outlet of the compressor 3 through a pipeline, the inlet of the compressor 3 is connected with the outlet of the evaporation side of the cold accumulation heat exchanger 2 through a pipeline, and the outlet of the cooler 4 is connected with the inlet of the supercritical carbon dioxide storage tank 5 through a pipeline for energy storage; the cooler 4 further comprises a heat absorption outlet and a heat absorption inlet, and the heat absorption outlet and the heat absorption inlet are connected with the single-tank phase-change packed bed heat accumulator 9 through pipelines; an outlet of the heater 6 is connected with an inlet of an expander 7 through a pipeline, an outlet of the expander 7 is connected with a condensing side inlet of the cold accumulation heat exchanger 2 through a pipeline, and an inlet of the heater 6 is connected with an outlet of the supercritical carbon dioxide storage tank 5 through a pipeline; the heater 6 further comprises a heat release outlet and a heat release inlet, and the heat release outlet and the heat release inlet are connected with the single-tank phase-change packed bed heat accumulator 9 through pipelines.
Further, the single-tank phase-change packed bed regenerator 9 comprises a first port 14 and a second port 19; the first interface 14 is respectively connected with a heat absorption outlet and a heat release inlet through pipelines; the second interface 19 is respectively connected with the heat absorption inlet and the heat release outlet through pipelines.
With respect to the specific structure of the single-tank phase change packed bed regenerator 9, referring to fig. 2, in a specific embodiment, the single-tank phase change packed bed regenerator 9 includes a shell 13 having an inner cavity, a first port 14 and a second port 19 formed on the shell 13, and a heat storage material located in the inner cavity; the first port 14 and the second port 19 are both communicated with the inner cavity; the heat storage material is an encapsulated phase-change heat storage material, the phase-change material is encapsulated inside, the exterior of the heat storage material is encapsulated by a metal shell, and then the heat storage material is orderly filled in the shell 13 according to a certain rule, the heat storage material is an encapsulated phase-change heat storage ball 18, the size of the encapsulated phase-change heat storage ball 18 can be changed along with the actual situation, and the filling mode can be regular filling or irregular filling; the first connector 14 and the second connector 19 are connected with the pipeline in a flange connection mode.
Further, the single-tank phase change packed bed heat accumulator 9 further comprises heat insulation cotton 12 fixed outside the shell 13, a diffuser 16 and a guide plate 17 located inside the shell 13, and a pressure gauge 20 and a safety valve 15 for regulating and controlling pressure. The heat-insulating cotton has the advantages that the heat loss can be prevented by arranging the heat-insulating cotton 12; the pressure gauge 20 and the safety valve 15 are used for safe pressure regulation, and the pressure in the heat storage unit loop and the pressure in the single-tank phase-change packed bed heat accumulator 9 are not too high due to the adoption of brief introduction heat exchange.
In a specific embodiment, the heat absorption circulation loop further comprises a heat absorption circulation pump 10 for driving the heat exchange working medium to flow in the heat absorption circulation loop and a first valve group for controlling the on-off of the heat absorption circulation loop; the heat release circulation loop also comprises a heat release circulation pump 11 for driving the heat exchange working medium to flow in the heat release circulation loop and a second valve group for controlling the on-off of the heat release circulation loop; more specifically, the first valve group includes a first valve 21 and a second valve 22; the second valve group comprises a fifth valve 25 and a sixth valve 26.
In a specific embodiment, the compressor 3 is driven by renewable energy discarded electricity, residual electricity of thermal power generation or power grid valley electricity to store energy; the expander 7 is connected with a generator for releasing energy.
In a specific embodiment, the cooler 4 and the heater 6 are both shell and tube heat exchangers.
In a particular embodiment, the compressor 3 and the expander 7 are of the centrifugal, screw or piston type; the liquid carbon dioxide storage tank 1 and the supercritical carbon dioxide storage tank 5 are both steel storage tanks.
In addition, in order to cool the low-pressure carbon dioxide from the expander 7 to the normal temperature state again, the energy storage loop unit further comprises a radiator 8 positioned between the outlet of the expander 7 and the condensation side inlet of the cold accumulation heat exchanger 2, a third valve 23 used for reducing the pressure of the circulating working medium in the liquid carbon dioxide storage tank 1, and a fourth valve 24 used for stabilizing the pressure of the circulating working medium in the supercritical carbon dioxide storage tank 5, through the arrangement, the pressure is reduced and partially vaporized by using the throttling effect of the third valve 23, and the pressure is stabilized by using the fourth valve 24, so that the sliding pressure loss is reduced and the energy release efficiency is increased as much as possible.
The compressor 3 and the expander 7 of the transcritical carbon dioxide energy storage system can be arranged in a multi-stage mode to realize higher compression ratio and expansion ratio, and correspondingly, a multi-stage intercooler 4 and an intermediate heater 6 can also be arranged to be matched.
The invention relates to a transcritical carbon dioxide energy storage system, which comprises the following specific operation processes:
energy storage process: the low-pressure liquid carbon dioxide in the liquid carbon dioxide storage tank 1 is subjected to pressure reduction and partial vaporization through the throttling effect of the third valve 23, cold energy is stored and further gasified through the cold storage heat exchanger 2, then the carbon dioxide gas enters the compressor 3 to be compressed into a supercritical state, compression heat is recovered through the cooler 4, finally the supercritical carbon dioxide enters the supercritical carbon dioxide storage tank 5 to be stored, and electric energy is converted into carbon dioxide to be stored in the internal energy.
The energy release process is as follows: the supercritical carbon dioxide stored in the supercritical carbon dioxide storage tank 5 needs to be stabilized through the fourth valve 24, so that the sliding pressure loss is reduced as much as possible, the energy release efficiency is increased, then the temperature is increased through the heater 6, then the supercritical carbon dioxide enters the expansion machine 7 and is pushed to generate electricity, the internal energy of the supercritical carbon dioxide is converted into electric energy to be output, the low-pressure carbon dioxide coming out of the expansion machine 7 is cooled to a normal temperature state through the radiator 8, and then the cold energy in the cold accumulation heat exchanger 2 is absorbed and further liquefied and stored in the liquid carbon dioxide storage tank 1.
The heat absorption and heat storage process is as follows: the heat absorption and heat storage process is mainly used for recovering compression heat, under the working condition of energy storage and heat absorption, the first valve 21 and the second valve 22 are both opened, the fifth valve 25 and the sixth valve 26 are both closed, the heat exchange working medium is driven by the heat absorption circulating pump 10 to enter the cooler 4 through the third pipeline 33 and the fourth pipeline 34 to absorb the compression heat, and then enters the single-tank phase change packed bed heat accumulator 9 through the first pipeline 31 and the second pipeline 32 to transfer the heat to the internal heat storage material for storage.
The heat release process: the heat releasing process is mainly used for providing latent heat for the expansion machine 7, the expansion efficiency is improved, under the working condition of energy releasing and heat releasing, the first valve 21 and the second valve 22 are both closed, the fifth valve 25 and the sixth valve 26 are both opened, a heat exchange working medium is driven by the heat releasing circulating pump 11 to sequentially enter the single-tank phase-change packed bed heat accumulator 9 through the sixth pipeline 36 and the third pipeline 33 to absorb heat storage materials to store heat, then sequentially enter the heater 6 through the second pipeline 32 and the fifth pipeline 35 to release heat, and a low-temperature heat exchange working medium returns to the single-tank phase-change packed bed heat accumulator 9 to complete the heat releasing process.
Wherein, the heat exchange working medium shares the second pipeline 32 and the third pipeline 33 under the working conditions of energy storage and heat absorption and the working conditions of energy release and heat release, but the flow direction of the heat exchange working medium is opposite.
In conclusion, the trans-critical carbon dioxide energy storage system provided by the invention uses liquid carbon dioxide and supercritical carbon dioxide for capacity storage, has the advantages of high energy storage density, small equipment occupation area and the like, and has a better application prospect in the fields of renewable energy consumption and thermal power unit energy storage peak regulation; and the heat storage unit of the transcritical carbon dioxide energy storage system provided by the invention adopts a single-tank phase-change packed bed heat accumulator, and compared with double-tank water sensible heat storage, the heat storage unit has the advantages of large heat storage capacity, high heat storage density, small equipment volume and the like, and has mature application experience. And two working conditions of heat storage and heat release can be freely regulated and controlled through the regulation of the pipeline valve, so that the consumption of excessive pipeline materials can be avoided, and the system is simpler.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (10)
1. A transcritical carbon dioxide energy storage system, comprising: the energy storage loop unit and the heat storage loop unit;
the energy storage loop unit comprises a liquid carbon dioxide storage tank, a cold accumulation heat exchanger, a compressor, a supercritical carbon dioxide storage tank and an expansion machine;
the outlet of the liquid carbon dioxide storage tank is connected with the inlet of the supercritical carbon dioxide storage tank through the evaporation side of the cold accumulation heat exchanger and the compressor;
an outlet of the supercritical carbon dioxide storage tank is connected with an inlet of the liquid carbon dioxide storage tank through an expansion machine and a condensation side of the cold accumulation heat exchanger in sequence;
the heat storage loop unit comprises a single-tank phase change packed bed heat accumulator, a cooler arranged between a compressor and a supercritical carbon dioxide storage tank, and a heater arranged between the supercritical carbon dioxide storage tank and an expander; the single-tank phase-change packed bed heat accumulator and the cooler form a heat absorption circulation loop; the single-tank phase-change packed bed heat accumulator and the heater form a heat release circulation loop.
2. The transcritical carbon dioxide energy storage system of claim 1, wherein the cooler inlet is connected to the outlet of a compressor, the inlet of the compressor is connected to the outlet of the evaporation side of the cold storage heat exchanger, and the cooler outlet is connected to the inlet of the supercritical carbon dioxide storage tank for energy storage; the cooler also comprises a heat absorption outlet and a heat absorption inlet, and the heat absorption outlet and the heat absorption inlet are both connected with the single-tank phase-change packed bed heat accumulator;
the outlet of the heater is connected with the inlet of an expander, the outlet of the expander is connected with the condensing side inlet of the cold accumulation heat exchanger, and the inlet of the heater is connected with the outlet of the supercritical carbon dioxide storage tank; the heater also comprises a heat release outlet and a heat release inlet, and the heat release outlet and the heat release inlet are both connected with the single-tank phase-change packed bed heat accumulator.
3. The transcritical carbon dioxide energy storage system of claim 2, wherein said single tank phase change packed bed regenerator includes a first port and a second port; the first interface is respectively connected with the heat absorption outlet and the heat release inlet; the second interface is respectively connected with the heat absorption inlet and the heat release outlet.
4. The transcritical carbon dioxide energy storage system of claim 1, wherein said single tank phase change packed bed heat accumulator includes a housing having an internal cavity, a first port and a second port formed on the housing, and a heat storage material located within the internal cavity; the first interface and the second interface are both communicated with the inner cavity; the heat storage material is a packaged phase-change heat storage ball.
5. The transcritical carbon dioxide energy storage system of claim 4, wherein said single tank phase change packed bed heat accumulator further comprises insulation cotton fixed outside the housing, diffusers and baffles located inside the housing, and a pressure gauge and safety valve to regulate pressure.
6. The transcritical carbon dioxide energy storage system of claim 1, wherein the endothermic circulating loop further comprises an endothermic circulating pump for driving the heat exchange working medium to flow in the endothermic circulating loop and a first valve set for controlling the on-off of the endothermic circulating loop;
the heat release circulation loop also comprises a heat release circulation pump used for driving the heat exchange working medium to flow in the heat release circulation loop and a second valve group used for controlling the on-off of the heat release circulation loop.
7. The transcritical carbon dioxide energy storage system of claim 1, wherein the compressor is driven by renewable energy waste electricity, residual electricity from thermal power generation or off-peak electricity from a power grid to store energy;
the expander is connected with a generator for releasing energy.
8. The transcritical carbon dioxide energy storage system of claim 1, wherein said cooler and heater are both shell and tube heat exchangers.
9. The transcritical carbon dioxide energy storage system of claim 1, wherein said compressors and expanders are centrifugal, screw, or piston type;
the liquid carbon dioxide storage tank and the supercritical carbon dioxide storage tank are both steel storage tanks.
10. The transcritical carbon dioxide energy storage system of claim 1, wherein said energy storage loop unit further comprises a heat sink located between the expander outlet and the cold storage heat exchanger condensation side inlet, a third valve to depressurize the circulating fluid within the liquid carbon dioxide storage tank, and a fourth valve to stabilize the circulating fluid within the supercritical carbon dioxide storage tank.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160146061A1 (en) * | 2014-11-26 | 2016-05-26 | General Electric Company | Electrothermal energy storage system and an associated method thereof |
| CN108117860A (en) * | 2017-12-18 | 2018-06-05 | 东莞理工学院 | Enhanced thermal conduction type fuse salt composite phase-change material and regenerative apparatus and energy storage method |
| CN109944773A (en) * | 2019-04-17 | 2019-06-28 | 西安交通大学 | A kind of cell composite energy supply system and method |
| CN112796981A (en) * | 2021-02-06 | 2021-05-14 | 中国长江三峡集团有限公司 | Non-afterburning compressed air energy storage system and method with efficient heat storage performance |
| WO2021184773A1 (en) * | 2020-03-20 | 2021-09-23 | 西安西热节能技术有限公司 | Flexible peak regulation system and method for air energy storage by power plant |
| CN113914952A (en) * | 2021-10-15 | 2022-01-11 | 西安热工研究院有限公司 | Power generation peak regulation system of transcritical carbon dioxide energy storage coupling steam turbine and operation method |
-
2022
- 2022-03-09 CN CN202210229569.XA patent/CN114622960A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160146061A1 (en) * | 2014-11-26 | 2016-05-26 | General Electric Company | Electrothermal energy storage system and an associated method thereof |
| CN108117860A (en) * | 2017-12-18 | 2018-06-05 | 东莞理工学院 | Enhanced thermal conduction type fuse salt composite phase-change material and regenerative apparatus and energy storage method |
| CN109944773A (en) * | 2019-04-17 | 2019-06-28 | 西安交通大学 | A kind of cell composite energy supply system and method |
| WO2021184773A1 (en) * | 2020-03-20 | 2021-09-23 | 西安西热节能技术有限公司 | Flexible peak regulation system and method for air energy storage by power plant |
| CN112796981A (en) * | 2021-02-06 | 2021-05-14 | 中国长江三峡集团有限公司 | Non-afterburning compressed air energy storage system and method with efficient heat storage performance |
| CN113914952A (en) * | 2021-10-15 | 2022-01-11 | 西安热工研究院有限公司 | Power generation peak regulation system of transcritical carbon dioxide energy storage coupling steam turbine and operation method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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