CN116123764B - A fully enclosed compressed gas liquefied energy storage and power generation system - Google Patents
A fully enclosed compressed gas liquefied energy storage and power generation systemInfo
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- CN116123764B CN116123764B CN202310111257.3A CN202310111257A CN116123764B CN 116123764 B CN116123764 B CN 116123764B CN 202310111257 A CN202310111257 A CN 202310111257A CN 116123764 B CN116123764 B CN 116123764B
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
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- 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
- F25B39/00—Evaporators; Condensers
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
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- 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
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a totally-enclosed compressed gas liquefaction energy storage power generation system which comprises a compression system, a first heat exchange unit, a high-pressure gas-liquid storage container, a second heat exchange unit, a heat exchange system, an expansion system, a low-temperature expansion system and a low-pressure gas-liquid storage container. The invention stores the circulating gas in a liquefied way, greatly reduces the volume of a storage tank, adopts a direct heat exchange mode of a coexistence body of high-temperature gas and low-temperature gas and liquid, avoids the loss of secondary heat exchange efficiency, accelerates the reaction speed of the system, adopts a fully-closed circulation without other substance input and output systems, adopts a combination mode of direct heat exchange and a low-temperature expander, ensures that the heat exchange system is less, has a simple structure, has no combustible gas to participate in circulation, avoids polluting the atmospheric environment, has smaller volume and is convenient to transport, and the subsystem can be added in a building block building mode in a module according to the use requirement.
Description
Technical Field
The invention belongs to the technical field of compressed gas energy storage, and particularly relates to a fully-closed compressed gas liquefaction energy storage power generation system.
Background
At present, green energy power generation technologies such as wind power, tidal energy, water power and solar energy are greatly developed worldwide, but obvious peak-valley effects exist in the power generation, so that the power transmission frequency of a power grid frequently fluctuates. In order to better cut peaks and fill valleys and ensure the normal operation of equipment, a reliable energy storage device is needed to participate in the adjustment.
The compressed air energy storage is characterized in that external air is compressed into high-pressure air, so that redundant electric energy is converted into internal energy to be stored, and when the electric energy is released, the expansion system is driven by the high-pressure air to apply work to release the electric energy, and the compressed air energy storage has the characteristics of high energy storage energy density, no pollution to external environment, smaller volume compared with other modes and the like. The air storage tank has the following defects that the volume of the air storage tank is larger, the air storage tank is inconvenient to transport and use, the relevance of each part is strong, the parts cannot be separated for use, air is still required to participate in the internal and external exchange of circulation, the requirements on the use environment and the purity of the air are met, and the use difficulty of the device is increased.
Disclosure of Invention
Aiming at the technical problems, the invention provides a totally-enclosed compressed gas liquefaction energy storage power generation system, which can effectively solve the defects of large volume, single use environment, poor portability, incapability of being distributed in different points and the like of the compressed air energy storage device.
The technical scheme is that the fully-closed compressed gas liquefaction energy storage power generation system comprises a compression system, a first heat exchange unit, a high-pressure gas-liquid storage container, a second heat exchange unit, a heat exchange system, an expansion system, a low-temperature expansion system and a low-pressure gas-liquid storage container, wherein the compression system comprises a motor and a compressor unit, the compressor unit is electrically connected with the motor, the first heat exchange unit comprises a first channel, a second channel, a third channel and a fourth channel which are arranged in parallel, the second heat exchange unit comprises a fifth channel and a sixth channel which are arranged in parallel, the heat exchange system comprises a low-temperature tank and a high-temperature tank, the expansion system comprises an expander and a first generator, the expander is electrically connected with the first generator, the low-temperature expansion system comprises a low-temperature expander and a second generator, and the low-temperature expander is electrically connected with the second generator;
The outlet of the compressor unit is connected with the inlet of the first channel, the outlet of the first channel is connected with the inlet of the high-pressure gas-liquid storage container, the outlet of the high-pressure gas-liquid storage container is connected with the inlet of the fifth channel, the outlet of the fifth channel is connected with the inlet of the expander, the outlet of the expander is connected with the inlet of the low-temperature expander, the outlet of the low-temperature expander is connected with the inlet of the low-pressure gas-liquid storage container, the outlet of the low-pressure gas-liquid storage container is connected with the inlet of the third channel, the outlet of the third channel is connected with the inlet of the compressor unit, the outlet of the low-temperature tank is connected with the inlet of the second channel, the outlet of the second channel is connected with the inlet of the high-temperature tank, the first outlet of the high-temperature tank is connected with the inlet of the sixth channel, the outlet of the sixth channel is connected with the inlet of the low-temperature tank, the second outlet of the high-temperature tank is connected with the inlet of the fourth channel, and the outlet of the fourth channel is connected with the inlet of the low-temperature tank.
Preferably, a first valve is arranged on a pipeline connected with an outlet of the first channel and an inlet of the high-pressure gas-liquid storage container, a second valve is arranged on a pipeline connected with an outlet of the high-pressure gas-liquid storage container and an inlet of the fifth channel, a third valve is arranged on a pipeline connected with an outlet of the second channel and an inlet of the high-temperature tank, a fourth valve is arranged on a pipeline connected with an outlet of the second channel and an inlet of the fourth channel, a fifth valve is arranged on a pipeline connected with an inlet of the first outlet of the high-temperature tank and an inlet of the sixth channel, a sixth valve is arranged on a pipeline connected with an outlet of the low-temperature expander and an inlet of the low-pressure gas-liquid storage container, and a seventh valve is arranged on a pipeline connected with an outlet of the low-pressure gas-liquid storage container and an inlet of the third channel.
Preferably, the compressor unit is one or more of an axial flow compressor, a centrifugal compressor, a mixed flow compressor, a reciprocating compressor, a scroll compressor and a screw compressor connected in series or in parallel.
Preferably, one or more of the axial flow expander, the centripetal expander, the mixed flow expander and the reciprocating expander are connected in series or in parallel.
Preferably, the compressor package is provided with an initial medium inlet.
Further, the initial medium is one or a mixture of more of air, carbon dioxide and helium.
Preferably, the heat exchange medium between the low temperature tank and the high temperature tank is water, air, paraffin, biomass oil, heat conducting oil, inorganic crystalline hydrated salt, molten salt, organic fatty acid, propane or glycol solution.
The beneficial effects are that in terms of volume, the circulating gas is liquefied and stored, so that the volume of the storage tank is greatly reduced;
In efficiency, a direct heat exchange mode of high-temperature gas and low-temperature gas-liquid coexistence is adopted, so that the loss of secondary heat exchange efficiency is avoided, and the reaction speed of the system is increased;
structurally, the full-closed circulation is realized, no other substance input and output system is arranged, and a direct heat exchange and low-temperature expansion machine combination mode is adopted, so that the number of heat exchange systems is small, and the device structure is simple;
no combustible gas participates in circulation, so that pollution to the atmospheric environment is avoided;
The portable device has small volume and is convenient to transport;
On the specification, the subsystem can be added in a building block mode in the module according to the use requirement.
Drawings
FIG. 1 is a schematic diagram of a fully enclosed compressed gas liquefaction energy storage power generation system of the present invention;
FIG. 2 is a schematic diagram of the compressed gas energy storage initial stage of FIG. 1;
FIG. 3 is a schematic diagram of the compressed gas energy storage completion stage of FIG. 1;
FIG. 4 is a schematic diagram of the configuration of the expanding gas energy release stage of FIG. 1;
In the figure, the serial numbers are 1, a compression system, 11, a motor, 12, a compressor unit, 2, a first heat exchange unit, 21, a first channel, 22, a second channel, 23, a third channel, 24, a fourth channel, 31, a first valve, 32, a second valve, 33, a third valve, 34, a fifth valve, 36, a sixth valve, 37, a seventh valve, 4, a high-pressure gas storage container, 5, a heat exchange system, 51, a low-temperature tank, 52, a high-temperature tank, 6, a second heat exchange unit, 61, a fifth channel, 62, a sixth channel, 7, an expansion system, 71, an expansion machine, 72, a first generator, 8, a low-temperature expansion system, 81, a low-temperature expansion machine, 82, a second generator, 9 and a low-pressure gas storage container.
Description of the embodiments
The invention is described in detail below with reference to the attached drawings and the specific embodiments:
examples
As shown in fig. 1, the fully-closed compressed gas liquefaction energy storage power generation system comprises a compression system 1, a first heat exchange unit 2, a high-pressure gas-liquid storage container 4, a second heat exchange unit 6, a heat exchange system 5, an expansion system 7, a low-temperature expansion system 8 and a low-pressure gas-liquid storage container 9, wherein the compression system 1 comprises a motor 11 and a compressor unit 12, the compressor unit 12 is electrically connected with the motor 11, the first heat exchange unit 2 comprises a first channel 21, a second channel 22, a third channel 23 and a fourth channel 24 which are arranged in parallel, the second heat exchange unit 6 comprises a fifth channel 61 and a sixth channel 62 which are arranged in parallel, the heat exchange system 5 comprises a low-temperature tank 51 and a high-temperature tank 52, the expansion system 7 comprises an expander 71 and a first generator 72, the expander 71 is electrically connected with the first generator 72, the low-temperature expansion system 8 comprises a low-temperature expander 81 and a second generator 82, and the low-temperature expander 81 is electrically connected with the second generator 82;
The outlet of the compressor unit 12 is connected with the inlet of the first channel 21, the outlet of the first channel 21 is connected with the inlet of the high-pressure gas-liquid storage container 4, the outlet of the high-pressure gas-liquid storage container 4 is connected with the inlet of the fifth channel 61, the outlet of the fifth channel 61 is connected with the inlet of the expander 71, the outlet of the expander 71 is connected with the inlet of the low-temperature expander 81, the outlet of the low-temperature expander 81 is connected with the inlet of the low-pressure gas-liquid storage container 9, the outlet of the low-pressure gas-liquid storage container 9 is connected with the inlet of the third channel 23, the outlet of the third channel 23 is connected with the inlet of the compressor unit 12, the outlet of the low-temperature tank 51 is connected with the inlet of the second channel 22, the outlet of the second channel 22 is connected with the inlet of the high-temperature tank 52, the first outlet of the high-temperature tank 52 is connected with the inlet of the sixth channel 62, the outlet of the sixth channel 62 is connected with the inlet of the low-temperature tank 51, the second outlet of the high-temperature tank 52 is connected with the inlet of the fourth channel 24, and the outlet of the fourth channel 24 is connected with the inlet of the low-temperature tank 51.
The pipeline connecting the outlet of the first channel 21 with the inlet of the high-pressure gas-liquid storage container 4 is provided with a first valve 31, the pipeline connecting the outlet of the high-pressure gas-liquid storage container 4 with the inlet of the fifth channel 61 is provided with a second valve 32, the pipeline connecting the outlet of the second channel 22 with the inlet of the high-temperature tank 52 is provided with a third valve 33, the pipeline connecting the second outlet of the high-temperature tank 52 with the inlet of the fourth channel 24 is provided with a fourth valve 34, the pipeline connecting the first outlet of the high-temperature tank 52 with the inlet of the sixth channel 62 is provided with a fifth valve 35, the pipeline connecting the outlet of the low-temperature expander 81 with the inlet of the low-pressure gas-liquid storage container 9 is provided with a sixth valve 36, and the pipeline connecting the outlet of the low-pressure gas-liquid storage container 9 with the inlet of the third channel 23 is provided with a seventh valve 37.
The compressor unit 12 is one or more of an axial compressor, a centrifugal compressor, a mixed flow compressor, a reciprocating compressor, a scroll compressor, and a screw compressor connected in series or in parallel.
One or more of the axial flow expander, the centripetal expander, the mixed flow expander and the reciprocating expander of the expander 71 are connected in series or in parallel.
The compressor package 12 is provided with an initial medium inlet.
The initial medium is one or a mixture of more of air, carbon dioxide and helium.
The heat exchange medium between the low temperature tank 51 and the high temperature tank 52 is water, air, paraffin, biomass oil, heat conducting oil, inorganic crystalline hydrated salt, molten salt, organic fatty acid, propane or glycol solution.
The system of the invention has the working principle that the boiling point of the gas increases along with the rising of the air pressure, and the gas is in a gaseous state after exceeding the boiling point and is in a liquid state after being lower than the boiling point. In the initial stage of compression energy storage, the amount of gas which can enter a compression system for doing work in a low-pressure gas-liquid coexisting body is small, so that the heat released by the high-temperature high-pressure gas is small, the operation efficiency of the compression energy storage system is low, in order to change the state and maximize the utilization system efficiency, the system is provided with the initial stage of compression energy storage, a heat exchange system is adopted to accelerate the endothermic gasification of the low-pressure gas-liquid coexisting body so as to reach the optimal operation stage of the compression energy storage system as soon as possible, when the heat released by the high-temperature high-pressure gas meets the heat required by the gasification of the low-pressure gas-liquid coexisting body, the heat released by the heat exchange system to the low-pressure coexisting body is closed, a valve of a high-temperature tank is opened, and redundant heat is stored after the heat released by the high-temperature high-pressure gas to the low-pressure gas coexisting body is used as a heat exchange medium, so that the heat loss and the inefficiency caused by the heat exchange system in the coexistence of the high-temperature high-pressure gas and the low-pressure gas can be avoided. In the energy release link of the expansion gas, the high-pressure gas-liquid coexisting body is expanded and gasified through the heat energy stored in the absorption heat exchange system, is transmitted to the expansion system to apply work to release electric energy, and then is further decompressed, cooled and liquefied through the low-temperature expander, so that the expansion gas can be stored conveniently.
In the initial stage of compressed gas energy storage, under the conditions that the operation efficiency of the energy storage system is low and the heat release of high-temperature high-pressure gas is insufficient, the heat exchange system is operated to release the heat to the low-pressure gas-liquid co-storage body so as to accelerate gasification, and the compressed energy storage system achieves higher operation efficiency in a shorter time. The specific operation process comprises the steps of opening a first valve 31, a seventh valve 37 and a fourth valve 34, keeping a third valve 33, a sixth valve 36, a second valve 32 and a fifth valve 35 closed, conveying a gas-liquid coexisting body stored in a low-pressure gas-liquid storage container 9 to a third channel 23 in a first heat exchange unit 2, absorbing heat, expanding and gasifying, then, conveying the gas into a compressor unit 12 in a compression system 1, driving the compressor unit 12 to apply work to compress the gas through a motor 11, conveying the gas with high temperature and high pressure output from the compressor unit 12 into the first channel 21 in the first heat exchange unit 2 to release heat for liquefaction, then conveying the liquefied gas into a high-pressure gas-liquid storage container 4, and conveying a heat exchange medium in a high-temperature tank 52 to a fourth channel 24 in the first heat exchange unit 2 through the fourth valve 34, and conveying the heat exchange medium after releasing the heat to a low-temperature tank 51.
And in the compressed gas energy storage complete stage, as the system further develops and enters the compressed gas energy storage complete stage, heat exchange is directly carried out by using the high-temperature high-pressure gas and low-pressure gas-liquid coexisting body, so that the defects of heat loss, low efficiency, slower system response and the like of a heat exchange medium in a heat exchange system can be reduced, the heat energy released by liquefying the high-temperature high-pressure gas is stored by adopting the heat exchange system, the first valve 31 and the seventh valve 37 are kept open, the third valve 33 is gradually opened until the third valve 33 is completely opened, so that the heat exchange medium in the low-temperature tank 51 is conveyed to the second channel 22 in the first heat exchange unit 2 to absorb heat, then conveyed to the high-temperature tank 52 to be kept, the fourth valve 34 is gradually closed until the third valve is completely closed, and the process of the heat exchange system 5 participating in the heat absorption gasification of the low-pressure gas-liquid coexisting body is reduced.
In the energy release stage of the expansion gas, the first valve 31, the seventh valve 37 and the third valve 33 are closed, the fourth valve 34 is kept closed, the second valve 32, the sixth valve 36 and the fifth valve 35 are opened, the structure schematic diagram is shown in fig. 4, the gas-liquid coexisting body stored in the high-pressure gas-liquid storage container 4 is conveyed to the fifth channel 61 in the second heat exchange unit 6 to absorb heat, expand and gasify to form high-temperature high-pressure gas, then the high-temperature high-pressure gas is conveyed to the expander 71 in the expansion system 7 to do work, the expander 71 drives the first generator 72 to output electric energy, the gas output after passing through the expansion system 7 enters the low-temperature expander 81 in the low-temperature expansion system 8 to do expansion work again, the low-temperature expander 81 drives the second generator 82 to output electric energy, and the gas is liquefied and conveyed to the low-pressure gas storage container 9 after passing through the low-temperature expander 81 to reduce the temperature and pressure. The heat exchange medium in the high-temperature tank 52 is conveyed to the sixth channel 62 of the second heat exchange unit 6 through the fifth valve 35 to release heat, and then conveyed to the low-temperature tank 51 to be stored.
Wherein the initial medium for the system can be any gas that is easily converted between a gas and a liquid, and the preferred initial medium is one or a mixture of several of air, carbon dioxide, helium. Taking carbon dioxide as an example, the saturation pressure is 0.422MPa at the temperature of-56.5 ℃ and 7.376MPa at the temperature of 31 ℃, and the conservative estimation can provide more than 16 times of compression ratio.
The invention discloses a totally-enclosed compressed gas liquefaction energy storage power generation system, which has the advantages that other energy sources and substances are not involved in internal and external exchange except electric energy, the compressed gas energy storage stage runs in two stages, the first initial stage is characterized in that under the condition of low system running efficiency and insufficient heat release of high-temperature high-pressure gas, a heat exchange system is added to release heat to a low-pressure gas-liquid co-storage body to accelerate gasification so that the compressed energy storage system achieves higher running efficiency in a short time, the second complete stage adopts high-temperature high-pressure gas to directly exchange heat with the low-pressure gas-liquid co-storage body to reduce the defects of heat loss, low efficiency, slow system response and the like caused by the heat exchange system as a heat exchange medium, the heat energy released by liquefying the high-temperature high-pressure gas is stored by adopting the heat exchange system, the low-temperature pump is adopted to liquefy the low-pressure gas, and the system only needs one heat exchange system by combining with the sectional energy storage, so that compared with the other compressed gas liquefaction energy storage systems, the number of the heat exchange system is reduced, the complexity and the using and the installation difficulty are greatly reduced.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
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| CN202310111257.3A CN116123764B (en) | 2023-02-14 | 2023-02-14 | A fully enclosed compressed gas liquefied energy storage and power generation system |
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| CN116123764B true CN116123764B (en) | 2025-09-30 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863752A (en) * | 2016-06-01 | 2016-08-17 | 中国科学院工程热物理研究所 | Compressed air energy storage system and method utilizing cold energy of liquefied natural gas |
| CN105863751A (en) * | 2016-06-01 | 2016-08-17 | 中国科学院工程热物理研究所 | Closed low temperature compressed air energy storage system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP7169305B2 (en) * | 2017-06-01 | 2022-11-10 | 中国科学院工程熱物理研究所 | Staged Regenerative Supercritical Compressed Air Energy Storage System and Method |
| GB2570946B (en) * | 2018-02-13 | 2021-03-10 | Highview Entpr Ltd | Heat-of-compression recycle system, and sub-systems thereof |
| CN211903494U (en) * | 2019-12-19 | 2020-11-10 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Liquefied air energy storage power generation system coupled with steam-water system of coal-fired power generating unit |
| CN212130568U (en) * | 2020-04-02 | 2020-12-11 | 中国科学院理化技术研究所 | liquid air energy storage system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863752A (en) * | 2016-06-01 | 2016-08-17 | 中国科学院工程热物理研究所 | Compressed air energy storage system and method utilizing cold energy of liquefied natural gas |
| CN105863751A (en) * | 2016-06-01 | 2016-08-17 | 中国科学院工程热物理研究所 | Closed low temperature compressed air energy storage system and method |
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