CN114645832A - Air refrigeration storage and power generation method and system thereof - Google Patents
Air refrigeration storage and power generation method and system thereof Download PDFInfo
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 46
- 238000010248 power generation Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000006835 compression Effects 0.000 claims abstract description 39
- 238000007906 compression Methods 0.000 claims abstract description 39
- 238000001816 cooling Methods 0.000 claims abstract description 25
- 238000009825 accumulation Methods 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000000110 cooling liquid Substances 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 10
- 239000002826 coolant Substances 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000004146 energy storage Methods 0.000 abstract description 33
- 239000003570 air Substances 0.000 description 78
- 239000000498 cooling water Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002803 fossil fuel Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- UFULAYFCSOUIOV-UHFFFAOYSA-N cysteamine Chemical compound NCCS UFULAYFCSOUIOV-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B23/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01B23/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- 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
- F01K7/02—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 being of multiple-expansion type
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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
- 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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
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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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion 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
- 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
- F25B9/004—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 air
Abstract
An air refrigeration storage and power generation method and a system thereof are provided, the air refrigeration storage and power generation method comprises the following power storage steps: s1, the air in the environment is driven to be compressed to a high-pressure state through a compression mechanism, and the high-pressure state air passing through a compression outlet of the compression mechanism cools the gas through a heat exchange mechanism; s2, discharging normal-temperature and high-pressure air from the outlet of the heat exchange mechanism, cooling the air in the heat exchanger of the high-pressure expansion machine, then expanding the air in the expansion mechanism to do work, and cooling the air to low temperature and low pressure; and S3, the low-temperature and low-pressure gas at the outlet of the expansion mechanism is driven to enter the cold accumulator to store cold energy in the cold accumulation medium, and the normal-temperature air at the outlet of the cold accumulator is discharged to the atmospheric environment. The energy storage can be realized by air refrigeration effectively through the structure, and an energy storage method different from the prior art is provided.
Description
Technical Field
The invention relates to the technical field of heat pump electricity storage and energy recycling, in particular to an air refrigeration storage and power generation method and system.
Background
The existing power energy storage technology comprises water pumping energy storage, compressed air energy storage, storage battery energy storage, superconducting magnetic energy, flywheel energy storage, super capacitor and the like. However, the existing energy storage method is single. Moreover, the above-described power storage methods all have their own problems. For example, the pumped power station energy storage system requires special geographical conditions for building two reservoirs and dams, and has the problems of long construction period and large initial investment. Moreover, large-scale reservoir construction can submerge vegetation in large area even in cities, causing ecological and immigration problems. 2. Common compressed air energy storage systems need to provide a heat source by depending on combustion of fossil fuels, so that the threats of gradual exhaustion and price rise of the fossil fuels are faced on one hand, and pollutants such as nitrides, sulfides, carbon dioxide and the like are still generated by combustion of the compressed air energy storage systems on the other hand, and the compressed air energy storage systems do not meet the development requirements of green and renewable energy sources. 3. More advanced compressed air energy storage systems, such as the research of advanced adiabatic compressed air energy storage systems (AACAES), ground compressed air energy storage systems (SVCAES), compressed air energy storage systems with heat recovery (AACAES) and air-steam combined cycle compressed air energy storage systems (CASH), and the like. Although compressed air energy storage systems are made substantially free of burning fossil fuels, the energy density of compressed air energy storage systems is still low and the problem of large air reservoirs is also required.
The energy storage device aims at solving the defects of the existing electric energy storage technology and provides a brand-new energy storage mode.
Disclosure of Invention
The invention aims to provide an air refrigeration storage and power generation method and a system thereof, so that the method can be distinguished from the existing electric energy storage technology, and energy storage is realized by air refrigeration. Therefore, the invention provides an air refrigeration storage and power generation method, which comprises the following power storage steps:
s1, the air in the environment is driven to be compressed to a high-pressure state through a compression mechanism, and the high-pressure state air passing through a compression outlet of the compression mechanism cools the gas through a heat exchange mechanism;
s2, discharging normal-temperature and high-pressure air from the outlet of the heat exchange mechanism, cooling the air in the heat exchanger of the high-pressure expansion machine, then expanding the air in the expansion mechanism to do work, and cooling the air to low temperature and low pressure;
and S3, the low-temperature and low-pressure gas at the outlet of the expansion mechanism is driven to enter the cold accumulator to store cold energy in the cold accumulation medium, and the normal-temperature air at the outlet of the cold accumulator is discharged to the atmospheric environment.
Optionally, in step S1, the ambient air is driven to be compressed to a high pressure state by passing through the low pressure compressor and the high pressure compressor in sequence; the high-pressure state air passing through the compression outlets of the low-pressure compressor and the high-pressure compressor respectively passes through a first heat exchanger and a second heat exchanger to cool the gas; and/or the presence of a gas in the gas,
in step S1, after the normal temperature and high pressure air enters the high pressure expander heat exchanger to be cooled, the first expander expands to do work, the medium pressure and medium temperature air discharged from the first expander exit enters the hot side of the low pressure expander heat exchanger, the medium pressure and medium temperature air enters the second expander to expand to do work, and the temperature is reduced to low temperature and low pressure.
Optionally, in step S3, the low-temperature and low-pressure gas at the outlet of the second expander is divided into two paths; and the other path of low-temperature and low-pressure gas at the outlet position of the second expander enters the cold side of the low-pressure expander heat exchanger, the temperature of the fluid at the outlet of the cold side of the low-pressure expander heat exchanger is increased, and the fluid at the outlet position of the cold side of the high-pressure expander heat exchanger is discharged to the atmospheric environment.
Optionally, the low-temperature sides of the first heat exchanger and the second heat exchanger are cooling liquid loops;
the coolant circuit includes: the first heat exchanger and the second heat exchanger are arranged in parallel, and heated cooling liquid discharged by the first heat exchanger and the second heat exchanger is cooled to normal temperature through the cooling tower and then is driven by the pump body to enter the first heat exchanger and/or the second heat exchanger to enter circulation again.
Optionally, the air refrigeration storage and power generation method includes the following energy release steps:
s1, allowing the normal-temperature high-pressure gas at the outlet of the energy release heat exchanger to enter an energy release expansion machine for expansion to do work, and transmitting the energy release expansion machine to an energy release compressor through a rotating shaft and driving a generator to generate electricity;
s2, the low-pressure gas at the outlet position of the energy-releasing expansion machine enters the regenerator, and the low-temperature low-pressure gas at the outlet position of the regenerator enters an energy-releasing compressor to be compressed to a high-pressure state; and the gas in a high-pressure state enters the low-temperature side of the energy release heat exchanger, and the high-pressure gas at the outlet position of the energy release heat exchanger enters the circulation again.
Optionally, the high-temperature side of the energy release heat exchanger is a cooling liquid loop; the coolant circuit includes: the cooling tower, the pump body and the energy release heat exchanger;
after cooling liquid discharged by the energy release heat exchanger is cooled to normal temperature through the cooling tower 12, the cooling liquid is driven by the pump body to enter the high-temperature side inlet of the energy release heat exchanger for re-entering circulation.
An air refrigeration storage and power generation system comprising:
air refrigeration storage circuit, including consecutive: the system comprises a compression mechanism, a heat exchange mechanism, a high-pressure expander heat exchanger, a first expander, a second expander and a cold accumulator.
Optionally, the air refrigeration storage circuit further comprises: the motor is used for driving the compression mechanism, and the drying dehumidifier is arranged at the inlet position of the compression mechanism and is used for removing moisture in the air; and/or the presence of a gas in the gas,
the compression mechanism is a multi-stage compression mechanism, including: a low pressure compressor and a high pressure compressor; and/or the presence of a gas in the gas,
the expansion mechanism is a multistage expansion mechanism, including: a first expander and a second expander.
Optionally, the air refrigeration storage and power generation system further includes: a cold energy power generation circuit comprising: the energy-releasing heat exchanger comprises an energy-releasing compressor, an energy-releasing expander, a generator, a cold accumulator and an energy-releasing heat exchanger.
The technical scheme of the invention has the following advantages:
1. the invention provides an air refrigeration storage and power generation method, which comprises the following power storage steps: s1, the air in the environment is driven to be compressed to a high-pressure state through a compression mechanism, and the high-pressure state air passing through a compression outlet of the compression mechanism cools the gas through a heat exchange mechanism; s2, discharging normal-temperature and high-pressure air from the outlet of the heat exchange mechanism, cooling the air in the heat exchanger of the high-pressure expansion machine, then expanding the air in the expansion mechanism to do work, and cooling the air to low temperature and low pressure; and S3, the low-temperature and low-pressure gas at the outlet of the expansion mechanism is driven to enter the cold accumulator to store cold energy in the cold accumulation medium, and the normal-temperature air at the outlet of the cold accumulator is discharged to the atmospheric environment.
In the invention, the energy storage can be effectively realized by air refrigeration through the mutual matching of the compression mechanism, the expansion mechanism and the regenerator. Moreover, the air refrigeration energy storage also has the advantages of convenient material acquisition and low use cost.
2. In the air refrigeration storage and power generation method provided by the invention, in step S1, air in the environment is driven to sequentially pass through a low-pressure compressor and a high-pressure compressor to be compressed to a high-pressure state; the high-pressure state air passing through the compression outlets of the low-pressure compressor and the high-pressure compressor respectively passes through a first heat exchanger and a second heat exchanger to cool the gas; and/or the presence of a gas in the gas,
in step S1, after the normal-temperature high-pressure air enters the high-pressure expander heat exchanger to be cooled, the first expander expands to do work, the medium-pressure medium-low-temperature air discharged from the outlet of the first expander enters the hot side of the low-pressure expander heat exchanger, the medium-pressure medium-low-temperature air enters the second expander to expand to do work, and the temperature is reduced to low temperature and low pressure.
According to the invention, more energy can be generated through the multistage compressor and the multistage expander, so that the energy storage efficiency of air refrigeration and storage is effectively increased.
3. In the air refrigeration storage and power generation method provided by the invention, in step S3, the low-temperature and low-pressure gas at the outlet position of the second expander is divided into two paths; and the other path of low-temperature and low-pressure gas at the outlet position of the second expander enters the cold side of the low-pressure expander heat exchanger, the temperature of the fluid at the outlet of the cold side of the low-pressure expander heat exchanger is increased, and the fluid at the outlet position of the cold side of the high-pressure expander heat exchanger is discharged to the atmospheric environment.
In the invention, low-temperature and low-pressure gas is divided into two paths, and one path is used for expansion work. And the other path of low-temperature and low-pressure gas enters the cold side of the low-pressure expander heat exchanger and is used for cooling the medium flowing into the inlet of the low-pressure expander heat exchanger. The structure can effectively apply the low-temperature and low-pressure gas medium to the whole air refrigeration storage and power generation system, thereby improving the air refrigeration storage efficiency.
4. According to the air refrigeration storage and power generation method provided by the invention, the low-temperature sides of the first heat exchanger and the second heat exchanger are cooling liquid loops; the coolant circuit includes: the cooling tower, the pump body, and the mutual parallel arrangement first heat exchanger with the second heat exchanger, first heat exchanger with the heating coolant liquid that the second heat exchanger was discharged passes through after the cooling tower cooled to the normal atmospheric temperature, drive in order to get into through the pump body first heat exchanger and/or the second heat exchanger gets into the circulation again.
In the invention, the cooling liquid passing through the heat exchanger can be quickly and effectively cooled to a large extent through the cooling liquid loop, so that the cooling liquid enters the energy storage circulation again.
5. The invention provides an air refrigeration storage and power generation method, which comprises the following energy release steps: s1, allowing the normal-temperature high-pressure gas at the outlet of the energy release heat exchanger to enter an energy release expansion machine for expansion to do work, and transmitting the energy release expansion machine to an energy release compressor through a rotating shaft and driving a generator to generate electricity; s2, the low-pressure gas at the outlet position of the energy-releasing expansion machine enters the regenerator, and the low-temperature low-pressure gas at the outlet position of the regenerator enters an energy-releasing compressor to be compressed to a high-pressure state; and the gas in a high-pressure state enters the low-temperature side of the energy release heat exchanger, and the high-pressure gas at the outlet position of the energy release heat exchanger enters the circulation again.
Can convert the cold energy that the regenerator stored into the electric energy high-efficiently through above-mentioned structure.
6. The invention provides an air refrigeration storage and power generation system, which comprises: air refrigeration storage circuit, including consecutive: the system comprises a compression mechanism, a heat exchange mechanism, a high-pressure expander heat exchanger, a first expander, a second expander and a cold accumulator; a cold energy power generation circuit comprising: the energy-releasing heat exchanger comprises an energy-releasing compressor, an energy-releasing expander, a generator, a cold accumulator and an energy-releasing heat exchanger.
The air refrigeration storage circuit further includes: the motor is used for driving the compression mechanism, and the drying dehumidifier is arranged at the inlet position of the compression mechanism and is used for removing moisture in the air; the compression mechanism is a multi-stage compression mechanism, including: a low pressure compressor and a high pressure compressor; the expansion mechanism is a multistage expansion mechanism, including: a first expander and a second expander. In the invention, the air refrigeration storage and power generation system can realize energy storage by air refrigeration, and effectively expands the existing energy storage method. In addition, the air refrigeration energy storage also has the advantages of convenient material acquisition and low use cost.
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 will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of an air refrigeration storage and power generation system provided by the invention.
Description of reference numerals:
1-an electric motor; 2-a low pressure compressor; 3-a high-pressure compressor; 4-a first expander; 5-a second expander; 6-drying the dehumidifier; 7-a first heat exchanger; 8-a second heat exchanger; 9-high pressure expander heat exchanger; 10-low pressure expander heat exchanger; 12-a cooling tower; 13-a pump body; 14-a regenerator; 15-a generator; 16-energy releasing expander; 17-an energy releasing compressor; 18-an energy releasing heat exchanger; 19 to 27-valves.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
A method for storing and generating air in a refrigerating way is described, and the specific using method is as follows:
during the energy storage, the valves 23, 25, 27, 21 are closed, and the valves 24, 26, 19, 22, 20 are opened.
The fluid flow of the air refrigeration storage loop is as shown in fig. 1, the starting motor 1 drives the compressor to work, after moisture of air in the environment is removed through the dehumidifier 6, the air passes through the low-pressure compressor 2 and the high-pressure compressor 3 to be in a high-pressure state, and the air passing through the compression outlets of the low-pressure compressor 2 and the high-pressure compressor 3 cools the air through the first heat exchanger 7 and the second heat exchanger 8. Normal-temperature high-pressure air at the outlet of the second heat exchanger 8 enters the hot side of the high-pressure expander heat exchanger 9 to be cooled and then enters the first expander 4 to do work through expansion, medium-pressure low-temperature air at the outlet of the first expander 4 enters the hot side of the low-pressure expander heat exchanger 10 to be further cooled and enters the second expander 5 to do work through expansion, and the temperature is reduced to a low-temperature low-pressure state; the low-temperature and low-pressure gas at the outlet of the second expander 5 is divided into two paths, one part of the low-temperature and low-pressure gas enters the cold side of the low-pressure expander heat exchanger 10, the temperature of the fluid at the outlet of the cold side of the low-pressure expander heat exchanger 10 is increased, and the fluid at the outlet of the cold side of the high-pressure expander heat exchanger 9 is increased and then discharged to the atmosphere; the other part of the fluid of the low-temperature low-pressure gas at the outlet of the second expander 5 enters the cold accumulator 14 to store cold energy in the cold accumulation medium, and the normal-temperature air at the outlet of the cold accumulator 14 is discharged to the atmosphere through the valve 22.
In this embodiment, the low-temperature sides of the first heat exchanger 7 and the second heat exchanger 8 are cooling liquid loops, each cooling liquid loop is composed of a cooling tower 12, a pump body 13, and the first heat exchanger 7 and the second heat exchanger 8 which are connected in parallel, the first heat exchanger 7 and the second heat exchanger 8 discharge heated cooling water, the cooling water is cooled to a normal-temperature state through the cooling tower 12, and then the cooling water in the normal-temperature state continues to enter into circulation through the pump body 13.
During the energy release process, the valves 24, 26, 19, 22 and 20 are closed, and the valves 23, 25, 27 and 21 are opened.
As shown in fig. 1, the cold energy power generation circuit is a closed power generation circuit formed by an energy release compressor 17, an energy release expander 16, a cold accumulator 14, and an energy release heat exchanger 18. The normal temperature high pressure gas at the outlet position of the energy release heat exchanger 18 in the loop enters the energy release expansion machine 16 to do expansion work, a part of work generated is transmitted to the energy release compressor 17 through a shaft, and the other part of work generated by the expansion work of the energy release expansion machine 16 drives the generator 15 to generate electricity. The low-pressure gas at the outlet of the energy releasing expansion machine 16 enters the cold accumulator 14, the low-temperature low-pressure gas at the outlet of the cold accumulator 14 enters the energy releasing compressor 17 to be compressed to a high-pressure state, the gas enters the low-temperature side of the energy releasing heat exchanger 18, and then the high-pressure gas at the outlet of the energy releasing heat exchanger 18 enters the circulation again.
The high-temperature side of the energy release heat exchanger 18 is a cooling liquid loop, the cooling liquid loop is composed of a cooling tower 12, a pump body 13 and the energy release heat exchanger 18, cooling water discharged by the energy release heat exchanger 18 is cooled to normal temperature through the cooling tower 12, and then enters the circulation again through the pump body 13.
An air refrigeration storage and power generation system comprising:
air refrigeration storage circuit, including consecutive: a compression mechanism, a heat exchange mechanism, a high pressure expander heat exchanger 9, and a first expander 4, a second expander 5, and a cold accumulator 14. In this embodiment, the air-cooling storage circuit further includes: a motor 1 for driving the compression mechanism, and a dehumidifier 6 disposed at an inlet of the compression mechanism to remove moisture from air; the compression mechanism is a multi-stage compression mechanism, including: a low-pressure compressor 2 and a high-pressure compressor 3; the expansion mechanism is a multistage expansion mechanism, including: a first expander 4 and a second expander 5.
A cold energy power generation circuit comprising: a power release compressor 17, a power release expander 16, a generator 15, and a cold accumulator 14 and a power release heat exchanger 18.
Of course, whether the air refrigeration storage system is provided with the energy release structure or not is not particularly limited in this embodiment, and in other embodiments, the air refrigeration storage system only includes the energy storage mechanism.
Of course, the number of compressor units constituting the compression mechanism is not particularly limited in this embodiment, and in other embodiments, the number of compressors constituting the compression mechanism may be three or more.
Of course, the number of expander units constituting the expansion mechanism is not particularly limited in this embodiment, and in other embodiments, three or more expanders constituting the expansion mechanism may be provided.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (9)
1. An air refrigeration storage and power generation method is characterized by comprising the following power storage steps:
s1, the air in the environment is driven to be compressed to a high-pressure state through a compression mechanism, and the high-pressure state air passing through a compression outlet of the compression mechanism cools the gas through a heat exchange mechanism;
s2, discharging normal-temperature and high-pressure air from the outlet of the heat exchange mechanism, cooling the air in the high-pressure expander heat exchanger (9), then expanding the air in the expansion mechanism to do work, and cooling the air to low temperature and low pressure;
and S3, the low-temperature and low-pressure gas at the outlet of the expansion mechanism is driven to enter the cold accumulator (14) to store cold energy in the cold accumulation medium, and the normal-temperature air at the outlet of the cold accumulator (14) is discharged to the atmospheric environment.
2. The air cooling storage and power generation method according to claim 1, wherein in step S1, the air in the environment is driven to be compressed to a high pressure state by passing through the low pressure compressor (2) and the high pressure compressor (3) in sequence; the high-pressure state air passing through the compression outlets of the low-pressure compressor (2) and the high-pressure compressor (3) respectively passes through a first heat exchanger (7) and a second heat exchanger (8) to cool the air; and/or the presence of a gas in the gas,
in step S1, after the normal-temperature high-pressure air enters the high-pressure expander heat exchanger (9) to be cooled, the first expander (4) expands to work, the medium-pressure medium-low-temperature air discharged from the outlet of the first expander (4) enters the hot side of the low-pressure expander heat exchanger (10), the medium-pressure medium-low-temperature air enters the second expander (5) to expand to work, and the temperature is reduced to low-temperature low-pressure.
3. The air refrigeration storage and power generation method according to claim 2, wherein in step S3, the low-temperature and low-pressure gas at the outlet position of the second expander (5) is divided into two paths; and the other path of low-temperature low-pressure gas at the outlet position of the second expander (5) enters the cold side of the low-pressure expander heat exchanger (10), the temperature of the fluid at the cold side outlet of the low-pressure expander heat exchanger (10) is increased, and the fluid at the cold side outlet position of the high-pressure expander heat exchanger (9) is discharged to the atmospheric environment.
4. The air refrigeration storage and power generation method of claim 2, wherein the low temperature side of the first heat exchanger (7) and the second heat exchanger (8) is a coolant loop;
the coolant circuit includes: cooling tower (12), the pump body (13) and mutual parallel arrangement first heat exchanger (7) with second heat exchanger (8), first heat exchanger (7) with second heat exchanger (8) exhaust heating coolant liquid passes through after cooling tower (12) cools off to the normal atmospheric temperature, drive through the pump body (13) in order to get into first heat exchanger (7) and/or second heat exchanger (8) reenter the circulation.
5. The air refrigeration storage and power generation method according to any one of claims 1 to 4, comprising the following energy releasing steps:
s1, enabling the normal-temperature high-pressure gas at the outlet of the energy release heat exchanger (18) to enter an energy release expansion machine (16) for expansion and work, and transmitting the energy release expansion machine (16) to an energy release compressor (17) through a rotating shaft and driving a generator (15) to generate electricity;
s2, the low-pressure gas at the outlet position of the energy release expander (16) enters the regenerator (14), and the low-temperature low-pressure gas at the outlet position of the regenerator (14) enters the energy release compressor (17) to be compressed to a high-pressure state; the gas in a high-pressure state enters the low-temperature side of the energy releasing heat exchanger (18), and the high-pressure gas at the outlet position of the low-temperature side of the energy releasing heat exchanger (18) enters the circulation again.
6. The air refrigeration storage and power generation method of claim 5, wherein the high temperature side of the energy rejecting heat exchanger (18) is a coolant loop; the coolant circuit includes: a cooling tower (12), a pump body (13) and an energy releasing heat exchanger (18);
after cooling liquid discharged by the energy release heat exchanger (18) is cooled to normal temperature through the cooling tower (12), the cooling liquid is driven by the pump body (13) to enter the high-temperature side inlet of the energy release heat exchanger (18) to enter the circulation again.
7. An air refrigeration storage and power generation system using the air refrigeration storage and power generation method of any one of claims 1 to 6, comprising:
air refrigeration storage circuit, including consecutive: the system comprises a compression mechanism, a heat exchange mechanism, a high-pressure expander heat exchanger (9), a first expander (4), a second expander (5) and a cold accumulator (14).
8. The air refrigeration storage and power generation system of claim 7 wherein the air refrigeration storage circuit further comprises: a motor (1) for driving the compression mechanism, and a dehumidifier (6) disposed at an inlet of the compression mechanism to remove moisture from air; and/or the presence of a gas in the gas,
the compression mechanism is a multi-stage compression mechanism, including: a low pressure compressor (2) and a high pressure compressor (3); and/or the presence of a gas in the gas,
the expansion mechanism is a multistage expansion mechanism, including: a first expander (4) and a second expander (5).
9. The air chilling storage and power generation system according to claim 7 or 8, further comprising:
a cold energy power generation circuit comprising: the device comprises an energy release compressor (17), an energy release expansion machine (16), a generator (15), a cold storage device (14) and an energy release heat exchanger (18).
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