CN114893298B - Closed refrigeration energy storage power generation system - Google Patents
Closed refrigeration energy storage power generation system Download PDFInfo
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- CN114893298B CN114893298B CN202210540509.XA CN202210540509A CN114893298B CN 114893298 B CN114893298 B CN 114893298B CN 202210540509 A CN202210540509 A CN 202210540509A CN 114893298 B CN114893298 B CN 114893298B
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 92
- 238000010248 power generation Methods 0.000 title claims abstract description 40
- 238000004146 energy storage Methods 0.000 title claims abstract description 33
- 239000007789 gas Substances 0.000 claims abstract description 23
- 239000002918 waste heat Substances 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 230000005611 electricity Effects 0.000 claims abstract description 12
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 238000010521 absorption reaction Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 claims 2
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000003570 air Substances 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000011093 media selection Methods 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/14—Gas-turbine plants having means for storing energy, e.g. for meeting peak loads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
-
- 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
- F25B31/00—Compressor arrangements
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides a closed refrigeration energy storage power generation system, which belongs to the technical field of energy storage power generation and comprises: the high-temperature heat accumulator is used for absorbing heat energy of the power plant; the energy release mechanism is provided with an energy release expander and an energy release compressor which are coaxially connected, the energy release expander is connected with the power generation unit, a high-temperature heat exchanger is arranged on a pipeline of the energy release compressor, which is communicated with the energy release expander, and a second medium flow passage of the high-temperature heat exchanger is communicated with the high-temperature heat accumulator; according to the closed refrigeration energy storage power generation system, when electricity is used in a low-peak period, part of high-grade heat energy of a gas turbine power plant and/or waste heat in turbine exhaust are absorbed through the high-temperature heat accumulator and stored, the high-grade cold heat energy stored in the electricity use low-peak period is circularly converted into kinetic energy through the heat engine of the energy release mechanism, and when the load required on a power grid side is low or fluctuation is large, stable operation and deep peak shaving of the gas turbine power generator set and recycling of the low-grade waste heat in the gas turbine power plant exhaust are realized.
Description
Technical Field
The invention relates to the technical field of energy storage and power generation, in particular to a closed refrigeration energy storage and power generation system.
Background
Because of energy transformation, the new energy duty ratio is improved, and the thermal power is required to provide peak regulation service while providing electricity demand. For example, in a gas power plant, peak shaving is required to meet the load balance of the power grid.
However, in the peak shaving process, in order to avoid excessive waste heat loss of the conventional power plant, an energy storage system is required to recover the rest of heat so as to realize peak shaving and valley filling.
Disclosure of Invention
Therefore, the invention provides a closed refrigeration energy storage power generation system for solving the technical problem of waste heat recovery of a conventional power plant.
In order to solve the above technical problems, the present invention provides a closed refrigeration energy storage power generation system, including:
the high-temperature heat accumulator is used for absorbing heat energy of the power plant;
the energy release mechanism is provided with an energy release expander and an energy release compressor which are coaxially connected, the energy release expander is connected with the power generation unit, the energy release expander is communicated with the energy release compressor through a first circulating pipeline, a high-temperature heat exchanger is arranged on a pipeline of the energy release compressor, which is communicated with the energy release expander, and a second medium runner of the high-temperature heat exchanger is communicated with the high-temperature heat accumulator.
Optionally, a low-temperature heat exchanger is arranged on a pipeline of the energy release expansion machine, which is communicated with the energy release compressor, a second medium flow passage of the low-temperature heat exchanger is communicated with the low-temperature cold accumulator, the low-temperature cold accumulator is communicated with a refrigerating system, and the refrigerating system is driven by a driving mechanism.
Optionally, the refrigeration system includes: the refrigeration system comprises a refrigeration compressor and a refrigeration expander which are coaxially connected, wherein a cold energy heat exchanger is connected to a pipeline leading to the refrigeration compressor of the refrigeration expander, and the low-temperature cold accumulator is communicated with the cold energy heat exchanger through a third circulating pipeline.
Optionally, the refrigeration compressors are provided with at least two groups which are coaxially connected, and two adjacent groups of refrigeration compressors are sequentially communicated through a pipeline.
Optionally, a first radiator is arranged on a pipeline communicated between two adjacent groups of refrigeration compressors.
Optionally, a second radiator is arranged on a pipeline of the refrigeration compressor leading to the refrigeration expander.
Optionally, a second circulating fan is arranged on the third circulating pipeline, and a fourth circulating fan is arranged on the pipeline between the low-temperature heat exchanger and the low-temperature regenerator.
Optionally, a second waste heat removal radiator is connected to a pipeline leading to the energy release compressor by the energy release expander.
Optionally, a third circulating fan is connected to a circulating pipeline between the high-temperature heat exchanger and the high-temperature heat accumulator.
Optionally, the high-temperature heat accumulator exchanges heat with the heat energy in the combustion chamber of the power plant through a heat energy absorption heat exchanger, and a first circulating fan is connected on a circulating pipeline between the high-temperature heat accumulator and the heat energy absorption heat exchanger.
The technical scheme of the invention has the following advantages:
according to the closed refrigeration energy storage power generation system provided by the invention, when electricity is used in a valley, part of high-grade heat energy and/or waste heat in turbine exhaust gas of a gas turbine power plant is absorbed through the high-temperature heat accumulator and stored, in an electricity consumption peak period, the high-grade cold heat energy stored in the electricity consumption valley period is circularly converted into kinetic energy through the heat engine of the energy release mechanism, and then is converted into electric energy through the power generation unit to be released, and when the load required on the power grid side is low or fluctuation is large, the stable operation and deep peak regulation of the gas turbine power generation unit and the recycling of the low-grade waste heat in the exhaust gas of the gas turbine power plant are realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a front view of one implementation of a closed refrigeration, energy storage and power generation system provided in an embodiment of the present invention.
Reference numerals illustrate:
1. an energy release compressor; 2. a first waste heat removal radiator; 3. a high temperature heat exchanger; 4. an energy release expander; 5. a power generation unit; 6. a second waste heat removal radiator; 7. a low temperature heat exchanger; 8. a fourth circulating fan; 9. a low temperature regenerator; 10. a third circulating fan; 11. a high temperature heat accumulator; 12. a compressor; 13. a combustion chamber; 14. a turbine; 15. a generator; 16. a three-way valve; 17. a first circulating fan; 18. a heat energy absorbing heat exchanger; 19. a driving mechanism; 20. a refrigeration expander; 21. a first refrigeration compressor; 22. a second refrigeration compressor; 23. a first radiator; 24. a second radiator; 25. a second circulating fan; 26. a cold energy heat exchanger.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific 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 explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The closed refrigeration energy storage power generation system provided by the embodiment can be used for peak clipping and valley filling in cooperation with a power plant.
As shown in fig. 1, a specific implementation manner of the closed refrigeration energy storage power generation system provided in this embodiment includes: a high temperature heat accumulator 11 and an energy release mechanism. The high-temperature heat accumulator 11 is used for absorbing heat energy of a power plant; the energy release mechanism is provided with an energy release expander 4 and an energy release compressor 1 which are coaxially connected, the energy release expander 4 is connected with the power generation unit 5, the energy release expander 4 is communicated with the energy release compressor 1 through a first circulating pipeline, a high-temperature heat exchanger 3 is arranged on a pipeline of the energy release compressor 1 which is communicated with the energy release expander 4, and a second medium runner of the high-temperature heat exchanger 3 is communicated with the high-temperature heat accumulator 11.
In the closed refrigeration energy storage power generation system provided by the embodiment, when electricity is used in a low-peak period, a part of high-grade heat energy in a combustion chamber of a gas turbine power plant and/or waste heat in turbine exhaust are absorbed through the high-temperature heat accumulator 11 and stored, and in the electricity-use peak period, the high-grade cold and heat energy stored in the electricity-use low-peak period is circularly converted into kinetic energy through a heat engine of the energy release mechanism and then converted into electric energy through the power generation unit 5 to be released, so that stable operation and deep peak regulation of the gas turbine power generator set and recycling of low-grade waste heat in the exhaust of the gas turbine power plant are realized when the required load on a power grid side is low or fluctuation is large.
As shown in fig. 1, in the closed refrigeration energy storage power generation system provided in this embodiment, a low-temperature heat exchanger 7 is disposed on a pipeline leading from the energy release expander 4 to the energy release compressor 1, a second medium flow passage of the low-temperature heat exchanger 7 is communicated with a low-temperature regenerator 9, the low-temperature regenerator 9 is communicated with a refrigeration system, and the refrigeration system is driven by a driving mechanism 19. By means of said cryogenic heat exchanger 7, cold energy can be absorbed during the passage of the gas from the energy-releasing expander to the energy-releasing compressor 1.
As shown in fig. 1, in the closed refrigeration energy storage power generation system provided in this embodiment, a pipeline leading to the energy release compressor 1 from the energy release expander 4 is connected with a second waste heat removal radiator 6. The second heat-dissipating radiator 6 is used for releasing the heat of the gas output from the energy-releasing expander 4, and maintains stable circulation, so that the gas can be conveniently compressed by the energy-releasing compressor 1.
As shown in fig. 1, in the closed refrigeration energy storage power generation system provided in this embodiment, the refrigeration system includes: the refrigeration compressor and the refrigeration expander 20 are coaxially connected, a cold energy heat exchanger 26 is connected to a pipeline of the refrigeration expander 20 leading to the refrigeration compressor, and the low-temperature cold accumulator 9 is communicated with the cold energy heat exchanger 26 through a third circulating pipeline. The refrigerating compressor is driven by the driving mechanism 19, the refrigerating medium is compressed by the refrigerating compressor, the medium is driven to flow, the working medium pushes the refrigerating expander to rotate, and the working medium expands and cools in the refrigerating expander to generate cold energy.
As shown in fig. 1, in the closed refrigeration energy storage power generation system provided in this embodiment, the refrigeration compressors are provided with a first refrigeration compressor 21 and a second refrigeration compressor 22 which are coaxially connected, and two adjacent groups of refrigeration compressors are sequentially communicated through a pipeline. The pressure of the refrigerating medium can be increased step by a plurality of groups of refrigerating compressors which are arranged in series.
As shown in fig. 1, in the closed refrigeration energy storage power generation system provided in this embodiment, a first radiator 23 is disposed on a pipeline communicating between two adjacent groups of refrigeration compressors. By means of the radiator 23, the temperature rise of the medium during compression can be reduced.
As shown in fig. 1, in the closed refrigeration energy storage power generation system provided in this embodiment, a second radiator 24 is disposed on a pipeline leading to the refrigeration expander 20 from the refrigeration compressor. The second radiator 24 can reduce and stabilize the temperature of the refrigerant flowing into the refrigeration expander 20, and can improve the refrigerating capacity and the refrigerating efficiency of the refrigeration expander 20.
As shown in fig. 1, in the closed refrigeration energy storage power generation system provided in this embodiment, a second circulating fan 25 is disposed on a third circulating pipeline communicating between the low-temperature regenerator 9 and the cold energy heat exchanger 26, and a fourth circulating fan 8 is disposed on a pipeline between the low-temperature heat exchanger 7 and the low-temperature regenerator 9. And respectively improving the flow of the gas in the pipeline by the circulating fans.
As shown in fig. 1, in the closed refrigeration energy storage power generation system provided in this embodiment, a third circulating fan 10 is connected to a circulating pipeline between the high-temperature heat exchanger 3 and the high-temperature heat accumulator 11, and the third circulating fan 10 is used to improve the flow of gas in the circulating pipeline.
As shown in fig. 1, in the closed refrigeration energy storage power generation system provided in this embodiment, the high-temperature heat accumulator 11 exchanges heat with heat energy in the combustion chamber 13 of the power plant through the heat energy absorption heat exchanger 18, a first circulating fan 17 is connected to a circulating pipeline between the high-temperature heat accumulator 11 and the heat energy absorption heat exchanger 18, and the flow of gas in the circulating pipeline is improved through the first circulating fan 17.
As shown in fig. 1, in the closed refrigeration energy storage power generation system provided in this embodiment, the gas power plant includes: the compressor 12 and the turbine 14, which are coaxially connected, further comprise a combustion chamber 13 and an electric generator 15. Natural gas is introduced into the combustion chamber 13 for combustion to generate heat energy, the air is compressed by the air compressor 12 and then is absorbed by the combustion chamber 13, then the air is led to the turbine 14 for flushing, the generator 15 is driven to rotate for generating electricity in the rotating process of the turbine 14, and meanwhile, the air compressor 12 is driven to rotate for continuously compressing fuel gas.
Principle of operation
As shown in FIG. 1, during electricity consumption low-peak, a part of high-temperature high-pressure gas is led from the outlet of the combustion chamber, mixed with turbine exhaust gas through a three-way valve, and flows into the heat energy absorption heat exchanger to release heat energy. The high-temperature heat accumulator 11 performs thermal energy storage by heat exchange of the thermal energy absorption heat exchanger 18. When electricity consumption is high, heat energy in the high-temperature heat accumulator 11 is extracted through the high-temperature heat exchanger 3 and the third circulating fan 10, then a high-temperature medium is led to the energy release expander 4 through the first circulating pipeline, and the energy release expander 4 drives the power generation unit 5 to generate power and simultaneously drives the energy release compressor 1 to synchronously rotate.
The medium after the energy release expander 4 is washed and rotated is conveyed towards the energy release compressor 1 through a first circulating pipeline, sequentially passes through the second waste heat removal radiator 6 and the low-temperature heat exchanger 7 in the middle, reduces the temperature of the medium, is pressurized by the energy release compressor 1, is conveyed towards the high-temperature heat exchanger 3 again, and passes through the first waste heat removal radiator 2 in the middle.
In the refrigeration system, the driving mechanism 19 drives the refrigeration compressor to rotate, and meanwhile, the kinetic energy generated by the refrigeration expander 20 also drives the refrigeration compressor to synchronously rotate. The refrigeration expander 20 expands and cools the refrigerant, then transmits the refrigerant to the low-temperature regenerator 9 through the cold energy heat exchanger 26, and the refrigerant after cooling is released from the cold energy heat exchanger 26 sequentially passes through the first refrigeration compressor 21 and the second refrigeration compressor 22, then returns to the refrigeration expander 20, and flows out from the first refrigeration compressor 21, then passes through the first radiator 23, flows out from the second refrigeration compressor 22, and then passes through the second radiator 24, so that the temperature rise of the refrigerant caused by compression is reduced. The driving mechanism 19 can be driven by electric energy when the electric energy is used for low-valley, so that the effects of peak clipping and valley filling are achieved.
With respect to media selection
The gaseous medium in the thermal energy storage loop, the cold energy storage loop, the heat release loop, the cold release loop, the heat pump refrigeration loop and the cold, hot and heat energy power generation loop can be one or more of argon, air, nitrogen, helium and carbon dioxide.
The high-temperature regenerator 11 and the low-temperature regenerator 9 may be cylinders, spheres, or cuboids, and the solid cold-storage and heat-storage medium may be one or a combination of at least two of rock, sand, metal particles, solid bricks, and the like.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (5)
1. A closed refrigeration energy storage power generation system comprising:
a high temperature heat accumulator (11) for absorbing heat energy of a power plant, the power plant having a combustion chamber (13), the high temperature heat accumulator (11) exchanging heat with heat energy in the combustion chamber (13) of the power plant through a heat energy absorbing heat exchanger (18);
the energy release mechanism is provided with an energy release expander (4) and an energy release compressor (1) which are coaxially connected, the energy release expander (4) is connected with the power generation unit (5), the energy release expander (4) is communicated with the energy release compressor (1) through a first circulating pipeline, a high-temperature heat exchanger (3) is arranged on a pipeline of the energy release compressor (1) which is communicated with the energy release expander (4), and a second medium flow passage of the high-temperature heat exchanger (3) is communicated with the high-temperature heat accumulator (11);
the energy release expander (4) is provided with a low-temperature heat exchanger (7) on a pipeline leading to the energy release compressor (1), a second medium flow passage of the low-temperature heat exchanger (7) is communicated with the low-temperature regenerator (9), the low-temperature regenerator (9) is communicated with a refrigerating system, and the refrigerating system is driven by a driving mechanism (19);
the refrigeration system includes: the refrigeration system comprises a refrigeration compressor and a refrigeration expander (20) which are coaxially connected, wherein a cold energy heat exchanger (26) is connected to a pipeline leading to the refrigeration compressor of the refrigeration expander (20), and the low-temperature cold accumulator (9) is communicated with the cold energy heat exchanger (26) through a third circulating pipeline;
the refrigerating compressors are provided with at least two groups which are coaxially connected, and two adjacent groups of refrigerating compressors are sequentially communicated through pipelines;
a first radiator (23) is arranged on a pipeline communicated between two adjacent groups of refrigeration compressors;
a second radiator (24) is arranged on a pipeline leading to the refrigeration expander (20) of the refrigeration compressor;
a pipeline leading to the energy release compressor (1) of the energy release expander (4) is connected with a second waste heat removal radiator (6);
when electricity is used in low-ebb, a part of high-temperature high-pressure gas is led from the outlet of the combustion chamber, mixed with turbine exhaust gas through a three-way valve, and flows into the heat energy absorption heat exchanger to release heat energy; the high-temperature heat accumulator (11) stores heat energy through heat exchange of the heat energy absorption heat exchanger (18); when electricity is used in a peak, heat energy in the high-temperature heat accumulator (11) is extracted through the high-temperature heat exchanger (3) and the third circulating fan (10), then a high-temperature medium is led to the energy release expander (4) through the first circulating pipeline, and the energy release expander (4) drives the power generation unit (5) to generate power and simultaneously drives the energy release compressor (1) to synchronously rotate;
the medium after the energy release expansion machine (4) is washed and rotated is conveyed towards the energy release compressor (1) through a first circulating pipeline, sequentially passes through a second waste heat dissipation radiator (6) and a low-temperature heat exchanger (7) in the middle, reduces the temperature of the medium, is pressurized by the energy release compressor (1) and is conveyed towards the high-temperature heat exchanger (3) again, and passes through a first waste heat dissipation radiator (2) in the middle;
in the refrigerating system, the refrigerating compressor is driven to rotate by a driving mechanism (19), and meanwhile, the kinetic energy generated by the refrigerating expander (20) also drives the refrigerating compressor to synchronously rotate; the refrigeration expander (20) is used for carrying out expansion refrigeration on a refrigeration medium, then transmitting the refrigeration medium to the low-temperature cold accumulator (9) through the cold energy heat exchanger (26), sequentially transmitting the refrigeration medium subjected to cold release in the cold energy heat exchanger (26) through the first refrigeration compressor (21) and the second refrigeration compressor (22), then returning the refrigeration medium to the refrigeration expander (20), and after the refrigeration medium flows out of the first refrigeration compressor (21), the refrigeration medium firstly passes through the first radiator (23), and after the refrigeration medium flows out of the second refrigeration compressor (22), the refrigeration medium firstly passes through the second radiator (24) so as to reduce medium temperature rise caused by compression.
2. The closed refrigeration, energy storage and power generation system according to claim 1, wherein a first circulating fan (17) is connected to a circulating pipeline between the high-temperature heat accumulator (11) and the heat energy absorption heat exchanger (18).
3. The closed refrigeration, energy storage and power generation system according to claim 1, wherein a second circulating fan (25) is arranged on the third circulating pipeline.
4. The closed refrigeration energy storage power generation system according to claim 1, wherein a third circulating fan (10) is connected to a circulating pipeline between the high-temperature heat exchanger (3) and the high-temperature heat accumulator (11).
5. The closed refrigeration, energy storage and power generation system according to claim 1, wherein a fourth circulating fan (8) is arranged on a pipeline between the low-temperature heat exchanger (7) and the low-temperature regenerator (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210540509.XA CN114893298B (en) | 2022-05-17 | 2022-05-17 | Closed refrigeration energy storage power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210540509.XA CN114893298B (en) | 2022-05-17 | 2022-05-17 | Closed refrigeration energy storage power generation system |
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| CN208870659U (en) * | 2018-08-30 | 2019-05-17 | 中储国能(北京)技术有限公司 | A kind of heat pump compressed-air energy-storage system |
| CN110206599A (en) * | 2019-06-04 | 2019-09-06 | 中国科学院工程热物理研究所 | A kind of cool and thermal power Federal Reserve co-feeding system |
| CN112780409A (en) * | 2021-03-18 | 2021-05-11 | 西安热工研究院有限公司 | Gas turbine and liquid compressed air energy storage coupling system and method adopting continuous detonation |
| CN114135349A (en) * | 2021-12-07 | 2022-03-04 | 中国科学院工程热物理研究所 | Thermal power plant waste heat recycling method and energy storage power generation system coupled with thermal power plant |
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| CN208870659U (en) * | 2018-08-30 | 2019-05-17 | 中储国能(北京)技术有限公司 | A kind of heat pump compressed-air energy-storage system |
| CN110206599A (en) * | 2019-06-04 | 2019-09-06 | 中国科学院工程热物理研究所 | A kind of cool and thermal power Federal Reserve co-feeding system |
| CN112780409A (en) * | 2021-03-18 | 2021-05-11 | 西安热工研究院有限公司 | Gas turbine and liquid compressed air energy storage coupling system and method adopting continuous detonation |
| CN114135349A (en) * | 2021-12-07 | 2022-03-04 | 中国科学院工程热物理研究所 | Thermal power plant waste heat recycling method and energy storage power generation system coupled with thermal power plant |
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