CN114060112B - Liquid compressed air energy storage method and system for utilizing exhaust waste heat of air cooling unit - Google Patents
Liquid compressed air energy storage method and system for utilizing exhaust waste heat of air cooling unit Download PDFInfo
- Publication number
- CN114060112B CN114060112B CN202111322847.8A CN202111322847A CN114060112B CN 114060112 B CN114060112 B CN 114060112B CN 202111322847 A CN202111322847 A CN 202111322847A CN 114060112 B CN114060112 B CN 114060112B
- Authority
- CN
- China
- Prior art keywords
- heat
- steam
- working medium
- heat exchanger
- air cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 116
- 238000004146 energy storage Methods 0.000 title claims abstract description 63
- 239000007788 liquid Substances 0.000 title claims abstract description 58
- 239000002918 waste heat Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000000605 extraction Methods 0.000 claims description 61
- 238000005338 heat storage Methods 0.000 claims description 58
- 238000007906 compression Methods 0.000 claims description 39
- 230000006835 compression Effects 0.000 claims description 37
- 238000009834 vaporization Methods 0.000 claims description 27
- 230000008016 vaporization Effects 0.000 claims description 27
- 238000010248 power generation Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000010795 Steam Flooding Methods 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 8
- 239000012530 fluid Substances 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
Classifications
-
- 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
- F01K13/00—General layout or general methods of operation of complete plants
-
- 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
- F01D15/08—Adaptations for driving, or combinations with, pumps
-
- 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
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
-
- 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
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/04—Using steam or condensate extracted or exhausted from steam engine plant for specific purposes other than heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
-
- 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
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/006—Accumulators and steam compressors
-
- 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
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/06—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein the engine being of extraction or non-condensing type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a liquid compressed air energy storage method and a system for utilizing exhaust waste heat of an air cooling unit. The high-efficiency coupling application of the energy storage technology and the thermal power generating unit is realized.
Description
Technical Field
The invention belongs to the field of turbine power generation, and particularly relates to a liquid compressed air energy storage method and system for utilizing exhaust waste heat of an air cooling unit.
Background
At present, renewable energy sources such as wind power, photovoltaic power generation and the like are rapidly rising, but the intermittence and randomness of renewable energy sources can cause great impact on a power grid, and further development and safety and stability of the whole power grid are severely restricted.
The energy storage facility can provide smooth power generation output, peak clipping and valley filling, and realize coordinated development between the intermittent renewable energy source power supply and the power grid. Furthermore, by additionally arranging an energy storage facility on the power generation side, multiple functions of enhancing the unit regulation capability, effectively supporting renewable energy grid connection, providing standby capacity and the like can be realized. In addition, the thermal power generating unit is combined with the energy storage facility, so that the defect of slow response time of the thermal power generating unit can be partially compensated. Along with the gradual perfection of the flexibility auxiliary service market, the thermal power generating unit can exert the flexibility of the thermal power generating unit to the maximum potential in an energy storage mode, so that the maximization of economic benefit is realized.
According to the prior art, energy storage is mainly divided into three types, namely mechanical energy storage (pumped storage, compressed air energy storage and flywheel energy storage), electrochemical energy storage (sodium-sulfur battery, flow battery, lead-acid battery and nickel-chromium battery) and electromagnetic energy storage (superconducting magnetic energy storage). But only two modes of pumped storage and compressed air storage are available for realizing MW-level large-scale energy storage at present. Pumped storage is greatly restricted by terrain conditions, and can have the risk of icing under the condition of extremely low northern air temperature. The energy storage density of the gaseous compressed air energy storage is low, and a large storage space such as salt caves, mountain holes and the like is needed, so that the energy storage density is also limited by the terrain conditions. The technology of liquid air energy storage can realize higher energy storage density by liquefying air, has smaller storage space and is not limited by geographical conditions, so that more and more attention is paid.
The existing liquid air energy storage technology is mainly combined with a renewable energy power generation system, and the research of the combination with a thermal power unit system is less.
Disclosure of Invention
The invention aims to overcome the defects, and provides a liquid compressed air energy storage method and system for utilizing exhaust steam waste heat of an air cooling unit, which can realize the free conversion process of thermal power supply side energy storage and energy release, and the split part directly air-cooling steam turbine exhaust steam is utilized by waste heat in the energy storage process, so that the unit exhaust steam pressure and cold source loss can be reduced, and the dual energy efficiency of the air cooling unit efficiency improvement and energy storage is realized.
In order to achieve the purpose, the liquid compressed air energy storage system for utilizing exhaust steam waste heat of the air cooling unit comprises an air cooling unit cylinder, wherein steam of the air cooling unit cylinder is connected with a steam extraction utilization heat storage heat exchanger and a back pressure driving type small steam turbine through pipelines, and the steam of the air cooling unit cylinder is connected with the air cooling exhaust steam utilization heat storage heat exchanger through pipelines;
the hot working medium outlet of the extraction and utilization heat exchanger is connected with the extraction and utilization high-temperature working medium storage tank through a pipeline, the working medium of the extraction and utilization high-temperature working medium storage tank is used as a heat source and is connected with the extraction and utilization energy release heat exchanger through a pipeline, the working medium outlet after the extraction and utilization energy release heat exchanger releases heat is connected with the extraction and utilization low-temperature working medium storage tank, and the extraction and utilization low-temperature working medium storage tank is connected with the extraction and utilization heat exchanger;
the back pressure driving type small steam turbine is connected with a multi-stage cold compressor, a heat source circulation loop of the multi-stage cold compressor is connected with a multi-stage compression heat collecting heat exchanger, a heat working medium outlet of the multi-stage compression heat collecting heat exchanger is connected with a compression heat utilization high-temperature working medium storage tank through a pipeline, a compressed air outlet of the multi-stage cold compressor is connected with a liquefaction heat exchanger, the liquefaction heat exchanger is connected with a low-temperature expansion machine, the low-temperature expansion machine is connected with a vapor-liquid separator, the vapor-liquid separator is connected with a liquid storage tank, the liquid storage tank is connected with a vaporization heat exchanger, a working medium of the high-temperature working medium storage tank is used as a heat source and is connected with the vaporization heat exchanger, a working medium outlet of the vaporization heat exchanger is connected with the compression heat utilization low-temperature working medium storage tank through a pipeline, and a liquid outlet after temperature rise in the vaporization heat exchanger is connected with a high back pressure exhaust gas utilization energy release heat exchanger through a pipeline;
the air cooling exhaust steam utilizes the heat storage medium outlet of the heat storage heat exchanger to connect the air cooling exhaust steam utilizes the high-temperature medium storage tank through the pipeline, the air cooling exhaust steam utilizes the working medium of the high-temperature medium storage tank to connect the air cooling exhaust steam utilizes the energy release heat exchanger as the heat source, the heat source outlet in the air cooling exhaust steam utilizes the energy release heat exchanger to connect the air cooling exhaust steam utilizes the low-temperature medium storage tank through the pipeline, the heated working medium outlet of the air cooling exhaust steam utilizes the energy release heat exchanger to connect the steam extraction utilizing the energy release heat exchanger through the pipeline, the air outlet of the steam extraction utilizing the energy release heat exchanger is connected with the multi-stage energy storage power generation turbine.
The high-temperature steam inlet of the thermal power air cooling unit is connected with the high-temperature steam outlet of the boiler through a pipeline.
The high-temperature steam outlet of the thermal power air cooling unit is connected with the air cooling island through a pipeline, and the condensate water outlet of the air cooling island is connected with the condensate water system.
The air cooling exhaust steam is connected with a condensation water system by utilizing condensed water of the heat storage heat exchanger.
The low-temperature expander is connected with a low-temperature expander generator.
The steam of the air cooling unit cylinder is connected with a heat storage heat exchanger and a back pressure driving small steam turbine through a heat storage pipeline for steam extraction.
The air cooling unit cylinder is connected with the air cooling exhaust steam utilization heat storage heat exchanger through an air cooling exhaust steam utilization pipeline.
The working method of the liquid compressed air energy storage system for utilizing exhaust steam waste heat of the air cooling unit comprises an energy storage stage and an energy release stage;
s11, extracting steam from a cylinder of an air cooling unit, wherein one part of the steam is sent to a steam extraction and utilization heat storage heat exchanger to exchange heat with a high-temperature heat storage working medium, the warmed working medium is sent to a steam extraction and utilization high-temperature working medium storage tank to store, the other part of the steam drives a back pressure driving type small steam turbine to push a multi-stage cold compressor, the exhaust steam of the cylinder of the air cooling unit is sent to the air cooling exhaust steam utilization heat storage heat exchanger to exchange heat with the high-temperature heat storage working medium, and heat energy after heat exchange is stored in the air cooling exhaust steam utilization high-temperature working medium storage tank;
s12, compressing air to a high-pressure state by a multi-stage indirect cooling compressor, sending the high-pressure air into a multi-stage compression heat collecting heat exchanger for heat exchange, and storing the warmed working medium into a compression heat utilization high-temperature working medium storage tank;
s13, enabling the compressed air subjected to heat exchange to enter a liquefaction heat exchanger to absorb cold energy, and cooling to enter a deep cooling state;
s14, liquefying the compressed air in a cryogenic state into liquid air through a low-temperature expander and a vapor-liquid separator, and storing the liquid air in a liquid storage tank, wherein the non-liquefied compressed air is subjected to S13;
the energy release phase comprises the following steps:
s21, the liquefied air in the liquid storage tank enters a vaporization heat exchanger to carry out regenerative heating, the heat source of the vaporization heat exchanger is compression heat in a high-temperature working medium storage tank by compression heat, and the circulating working medium discharged in the vaporization heat exchanger enters a low-temperature working medium storage tank by compression heat;
s22, the compressed air after the temperature rise and vaporization in the vaporization heat exchanger enters an air-cooled exhaust steam utilization energy release heat exchanger, the air-cooled exhaust steam utilization energy release heat exchanger carries out second temperature rise, the heat source of the air-cooled exhaust steam utilization energy release heat exchanger is exhaust steam waste heat energy in an air-cooled exhaust steam utilization high-temperature working medium storage tank, and the circulating working medium after heat release enters the air-cooled exhaust steam utilization high-temperature working medium storage tank;
s23, the compressed air subjected to secondary temperature rise enters a steam extraction and utilization heat storage heat exchanger, the heat storage energy stored in a steam extraction and utilization high-temperature working medium storage tank is utilized to carry out third temperature rise, and the circulating working medium subjected to heat release in the steam extraction and utilization heat storage heat exchanger enters a steam extraction and utilization low-temperature working medium storage tank;
s24, the compressed air after three times of temperature rise enters a multi-stage energy storage power generation turbine, expands and works in the multi-stage energy storage power generation turbine, and supplies power to the outside.
And extracting steam from the air cooling unit cylinder and sending the steam into the air cooling island.
Compared with the prior art, the system fully utilizes the effective mass-heat energy flow of the thermal power generating unit, reduces the electric energy consumption in the existing energy storage process through flow optimization, realizes energy cascade utilization and storage, and improves the overall energy conversion efficiency of energy storage implementation. The high-efficiency coupling application of the energy storage technology and the thermal power generating unit is realized.
The method of the invention combines the energy storage system with the air cooling unit, during the energy storage process, high-energy-quality steam is extracted from the air cooling unit, one part is used for driving a small turbine to drive a multi-stage cold compressor to compress air, the other part is used for carrying out heat exchange with a high-temperature heat storage working medium to store high-quality heat energy, the compressed air is further used for forming liquefied air through a liquefying heat exchanger and then is stored in a low-temperature liquid tank, and the temperature of the compressed heat in the collected multi-stage compression process and the heat storage energy in a high-temperature heat storage circulation module are utilized to carry out temperature elevation when needed so as to enhance the function of an energy release turbine. The invention can reduce the exhaust pressure of the unit and the cold source loss, realizes the dual energy efficiency of the efficiency improvement and the energy storage of the air cooling unit, and has great significance for promoting the consumption of renewable energy sources and improving the stability of a power grid.
Drawings
FIG. 1 is a system block diagram of the present invention;
1, a multi-stage energy storage power generation turbine; 2. an air cooling exhaust steam utilizes an energy release heat exchanger; 3. the air cooling exhaust steam utilizes a high-temperature working medium storage tank; 4. the air cooling exhaust steam utilizes a low-temperature working medium storage tank; 5. the air cooling exhaust steam utilizes a heat storage heat exchanger; 6. an air cooling exhaust steam utilizing pipeline; 7. extracting steam by using a high-temperature working medium storage tank; 8. extracting steam by using a low-temperature working medium storage tank; 9. the extraction of steam utilizes an energy release heat exchanger; 10. the steam extraction utilizes a heat storage heat exchanger; 11. the steam extraction utilizes a heat storage pipeline; 12. back pressure driven small steam turbines; 13. a multi-stage indirect cooling compressor; 14. a multi-stage compression heat collection heat exchanger; 15. a high-temperature working medium storage tank for compression heat utilization; 16. the compression heat utilizes a low-temperature working medium storage tank; 17. a vapor-liquid separator; 18. a liquefaction heat exchanger; 19. a low temperature expander; 20. a low temperature expander generator; 21. a liquid storage tank; 22. a vaporization heat exchanger; 23. air cooling island; 24. a thermal power air cooling unit; 25. a boiler.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, the liquid compressed air energy storage system for utilizing exhaust steam waste heat of an air cooling unit comprises an air cooling unit cylinder 24, wherein steam of the air cooling unit cylinder 24 is connected with a steam extraction and utilization heat storage heat exchanger 10 and a back pressure driving type small steam turbine 12 through pipelines, and steam of the air cooling unit cylinder 24 is connected with an air cooling exhaust steam utilization heat storage heat exchanger 5 through pipelines;
the hot working medium outlet of the extraction and utilization heat exchanger 10 is connected with the extraction and utilization high-temperature working medium storage tank 7 through a pipeline, the working medium of the extraction and utilization high-temperature working medium storage tank 7 is used as a heat source and is connected with the extraction and utilization energy release heat exchanger 9 through a pipeline, the working medium outlet after the extraction and utilization energy release heat exchanger 9 releases heat is connected with the extraction and utilization low-temperature working medium storage tank 8, and the extraction and utilization low-temperature working medium storage tank 8 is connected with the extraction and utilization heat exchanger 10;
the back pressure driving type small steam turbine 12 is connected with the multi-stage indirect cooling compressor 13, a heat source circulation loop of the multi-stage indirect cooling compressor 13 is connected with the multi-stage compression heat collection heat exchanger 14, a heat working medium outlet of the multi-stage compression heat collection heat exchanger 14 is connected with the compression heat utilization high-temperature working medium storage tank 15 through a pipeline, a compressed air outlet of the multi-stage indirect cooling compressor 13 is connected with the liquefaction heat exchanger 18, the liquefaction heat exchanger 18 is connected with the low-temperature expansion machine 19, the low-temperature expansion machine 19 is connected with the vapor-liquid separator 17, the vapor-liquid separator 17 is connected with the liquid storage tank 21, the liquid storage tank 21 is connected with the vaporization heat exchanger 22, a working medium of the high-temperature working medium storage tank 15 is connected with the vaporization heat exchanger 22 as a heat source, a working medium outlet of the vaporization heat exchanger 22 is connected with the compression heat utilization low-temperature working medium storage tank 16 through a pipeline, the compression heat utilization low-temperature working medium storage tank 16 is connected with the multi-stage compression heat collection heat exchanger 14, and a liquid outlet after temperature rise in the vaporization heat exchanger 22 is connected with the high back pressure exhaust and utilization energy release heat exchanger 2 through a pipeline;
the air-cooled exhaust steam utilizes the heat storage working medium outlet of the heat storage heat exchanger 5 to connect the air-cooled exhaust steam utilizes the high-temperature working medium storage tank 3 through a pipeline, the air-cooled exhaust steam utilizes the working medium of the high-temperature working medium storage tank 3 to be used as a heat source to connect the air-cooled exhaust steam utilizes the energy release heat exchanger 2, the heat source outlet in the air-cooled exhaust steam utilizes the energy release heat exchanger 2 to connect the air-cooled exhaust steam utilizes the low-temperature working medium storage tank 4 through a pipeline, the heated working medium outlet of the air-cooled exhaust steam utilizes the energy release heat exchanger 2 to connect the steam extraction utilizing energy release heat exchanger 9 through a pipeline, and the air outlet of the steam extraction utilizing energy release heat exchanger 9 is connected with the multi-stage energy storage power generation turbine 1.
The high-temperature steam inlet of the thermal power air cooling unit 24 is connected with the high-temperature steam outlet of the boiler 25 through a pipeline.
The high-temperature steam outlet of the thermal power air cooling unit 24 is connected with the air cooling island 23 through a pipeline, and the condensate water outlet of the air cooling island 23 is connected with a condensate water system.
The air-cooled exhaust steam is connected with a condensate water system by condensate water of the heat storage heat exchanger 5.
The low-temperature expander 19 is connected to a low-temperature expander generator 20.
The steam of the air cooling unit cylinder 24 is connected with the steam extraction heat storage heat exchanger 10 and the back pressure driving small steam turbine 12 through the steam extraction heat storage pipeline 11.
The air cooling unit cylinder 24 is connected with the air cooling exhaust steam utilization heat storage heat exchanger 5 through an air cooling exhaust steam utilization pipeline 6.
The working method of the liquid compressed air energy storage system for utilizing exhaust steam waste heat of the air cooling unit comprises an energy storage stage and an energy release stage;
s11, extracting steam from an air cooling unit cylinder 24, wherein one part of the steam is sent to a steam extraction and utilization heat storage heat exchanger 10 to exchange heat with a high-temperature heat storage working medium, the warmed working medium is sent to a steam extraction and utilization high-temperature working medium storage tank 7 to be stored, the other part of the steam drives a back pressure driving type small steam turbine 12 to push a multi-stage indirect cooling compressor 13, the exhaust steam of the air cooling unit cylinder 24 is sent to an air cooling exhaust steam utilization heat storage heat exchanger 5 to exchange heat with the high-temperature heat storage working medium, and the heat energy after heat exchange is stored in the air cooling exhaust steam utilization high-temperature working medium storage tank 3; the air cooling unit cylinder 24 extracts steam and sends the steam into the air cooling island 23.
S12, the multi-stage indirect cooling compressor 13 compresses air to a high-pressure state, the high-pressure air is sent into the multi-stage compression heat collecting heat exchanger 14 for heat exchange, and the heated working medium is stored into the compression heat utilization high-temperature working medium storage tank 15;
s13, the compressed air after heat exchange enters a liquefaction heat exchanger 18 to absorb cold energy, and is cooled to enter a deep cooling state;
s14, liquefying the compressed air in a cryogenic state into liquid air through a low-temperature expander 19 and a vapor-liquid separator 17, storing the liquid air in a liquid storage tank 21, and executing S13 by the non-liquefied compressed air;
the energy release phase comprises the following steps:
s21, the liquefied air in the liquid storage tank 21 enters the vaporization heat exchanger 22 for backheating, the heat source of the vaporization heat exchanger 22 is compression heat in the compression heat utilization high-temperature working medium storage tank 15, and the circulating working medium after heat release in the vaporization heat exchanger 22 enters the compression heat utilization low-temperature working medium storage tank 16;
s22, compressed air after temperature rising and vaporization in the vaporization heat exchanger 22 enters the air-cooled exhaust steam utilization energy release heat exchanger 2, the air-cooled exhaust steam utilization energy release heat exchanger 2 carries out second temperature rising, a heat source of the air-cooled exhaust steam utilization energy release heat exchanger is exhaust waste heat energy in the air-cooled exhaust steam utilization high-temperature working medium storage tank 3, and a circulating working medium after heat release enters the air-cooled exhaust steam utilization high-temperature working medium storage tank 4;
s23, the compressed air finally subjected to the secondary temperature rise enters a steam extraction and utilization heat storage heat exchanger 11, the heat storage energy stored in a steam extraction and utilization high-temperature working medium storage tank 7 is utilized to perform the third temperature rise, and the circulating working medium after heat release in the steam extraction and utilization heat storage heat exchanger 11 enters a steam extraction and utilization low-temperature working medium storage tank 8;
s24, the compressed air after three times of temperature rise enters the multi-stage energy storage power generation turbine 1, expands and works in the multi-stage energy storage power generation turbine 1, and supplies power to the outside.
The extraction steam utilizes a high-temperature working medium storage tank 7 to store the heat energy of the extraction steam;
the air-cooled exhaust steam utilizes a high-temperature working medium storage tank 3 for storing heat energy of the air-cooled exhaust steam;
the multi-stage indirect cooling compressor 13 is used for compressing air;
the multistage compression heat collection heat exchanger 14 is used for collecting compression heat when compressed air is compressed and storing the compression heat in the compression heat utilization high-temperature working medium storage tank 15;
the liquefaction heat exchanger 22 is used for absorbing the cold energy of the compressed air and cooling the compressed air into a cryogenic state;
the low-temperature expander 19 is used for reducing the pressure and temperature of the compressed air in a cryogenic state;
the vapor-liquid separator 17 is used for separating liquid air and gaseous air;
the liquid storage tank 21 is used for storing liquid air.
In the energy release process, liquefied air in the low-temperature liquid tank is pumped into a low-temperature pump to raise pressure, firstly, the collected compression heat in the multi-stage compression process is utilized to carry out regenerative heating in a vaporization heat exchanger, the temperature is raised and vaporization is carried out, then, the stored exhaust residual heat energy is utilized to carry out first temperature raising, and finally, the heat storage energy in the high-temperature heat storage circulation module is further utilized to carry out second temperature raising, so that the acting capacity of the compressed air is improved. And then compressed air enters an energy storage power generation turbine, expands and works in the turbine, and supplies power to the outside.
After the energy storage flow is started, the split direct steam turbine exhaust steam enters a steam exhaust waste heat energy storage heat exchanger to exchange heat with the heat conduction fluid, and the exhaust steam is condensed into condensed water which is then converged into a condensed water system. And the heat-conducting fluid after temperature rise is stored in a high-temperature heat storage tank for storing and collecting the exhaust waste heat. In the energy release process, the heat conduction fluid in the exhaust waste heat high-temperature heat storage tank flows out through the circulating pump, circulates to the air-to-primary heat generation heat exchanger to exchange heat with the vaporized air working medium, and carries out primary preheating and heating on the air.
After the energy storage process is started, most of the flow of high-energy-quality steam is extracted from the air cooling unit, heat exchange is carried out between the high-energy-quality steam and a heat storage working medium in a high-temperature steam heat exchanger, high-quality heat is stored in a high-temperature working medium heat storage tank, and the steam releases heat to form hydrophobic reflux to a turbine thermodynamic system. In the energy release process, the high-temperature working medium heat storage tank flows out through the circulating pump, circulates to the air secondary temperature raising heat exchanger to exchange heat with the vaporized air working medium, and the air is heated to a high temperature state, so that the working capacity of the energy storage power generation steam turbine is effectively enhanced.
Claims (9)
1. The liquid compressed air energy storage system for utilizing exhaust steam waste heat of the air cooling unit is characterized by comprising an air cooling unit cylinder (24), wherein steam of the air cooling unit cylinder (24) is connected with a steam extraction and utilization heat storage heat exchanger (10) and a back pressure driving type small steam turbine (12) through a pipeline, and steam of the air cooling unit cylinder (24) is connected with the air cooling exhaust steam utilization heat storage heat exchanger (5) through a pipeline;
the hot working medium outlet of the steam extraction and utilization heat exchanger (10) is connected with the steam extraction and utilization high-temperature working medium storage tank (7) through a pipeline, the working medium of the steam extraction and utilization high-temperature working medium storage tank (7) is used as a heat source and connected with the steam extraction and utilization energy release heat exchanger (9) through a pipeline, the working medium outlet after the heat release of the steam extraction and utilization energy release heat exchanger (9) is connected with the steam extraction and utilization low-temperature working medium storage tank (8), and the steam extraction and utilization low-temperature working medium storage tank (8) is connected with the steam extraction and utilization heat exchanger (10);
the back pressure driving type small steam turbine (12) is connected with a multi-stage cold compressor (13), a heat source circulation loop of the multi-stage cold compressor (13) is connected with a multi-stage compression heat collection heat exchanger (14), a heat working medium outlet of the multi-stage compression heat collection heat exchanger (14) is connected with a compression heat utilization high-temperature working medium storage tank (15) through a pipeline, a compressed air outlet of the multi-stage cold compressor (13) is connected with a liquefaction heat exchanger (18), the liquefaction heat exchanger (18) is connected with a low-temperature expansion machine (19), the low-temperature expansion machine (19) is connected with a vapor-liquid separator (17), the vapor-liquid separator (17) is connected with a liquid storage tank (21), the liquid storage tank (21) is connected with a vaporization heat exchanger (22), a working medium outlet of the high-temperature working medium storage tank (15) is connected with a compression heat utilization low-temperature working medium storage tank (16) through a pipeline, a liquid outlet after temperature rise in the vaporization heat exchanger (22) is connected with a high back pressure vapor utilization energy release heat exchanger (2) through a pipeline;
the air cooling exhaust steam utilizes the heat storage working medium outlet of the heat storage heat exchanger (5) to connect the air cooling exhaust steam utilizes the high temperature working medium storage tank (3) through the pipeline, the air cooling exhaust steam utilizes the working medium of the high temperature working medium storage tank (3) to be used as the heat source to connect the air cooling exhaust steam utilizes the energy release heat exchanger (2), the heat source outlet in the air cooling exhaust steam utilizes the energy release heat exchanger (2) to connect the air cooling exhaust steam utilizes the low temperature working medium storage tank (4) through the pipeline, the heated working medium outlet of the air cooling exhaust steam utilizes the energy release heat exchanger (2) to connect the extraction steam utilizes the energy release heat exchanger (9) through the pipeline, and the air outlet of the extraction steam utilizes the energy release heat exchanger (9) to connect the multi-stage energy storage power generation turbine (1).
2. The liquid compressed air energy storage system for utilizing exhaust steam waste heat of air cooling unit according to claim 1, wherein the high-temperature steam inlet of the thermal power air cooling unit (24) is connected with the high-temperature steam outlet of the boiler (25) through a pipeline.
3. The liquid compressed air energy storage system for utilizing exhaust steam waste heat of an air cooling unit according to claim 1, wherein a high-temperature steam outlet of a thermal power air cooling unit (24) is connected with an air cooling island (23) through a pipeline, and a condensate water outlet of the air cooling island (23) is connected with a condensate water system.
4. The liquid compressed air energy storage system for utilizing exhaust steam waste heat of air cooling unit according to claim 1, wherein the air cooling exhaust steam is connected with a condensate water system by utilizing condensate water of a heat storage heat exchanger (5).
5. The liquid compressed air energy storage system for utilizing exhaust gas waste heat of air cooling unit according to claim 1, wherein the low-temperature expander (19) is connected with the low-temperature expander generator (20).
6. The liquid compressed air energy storage system for utilizing exhaust steam waste heat of an air cooling unit according to claim 1, wherein steam of a cylinder (24) of the air cooling unit is connected with a steam extraction heat storage heat exchanger (10) and a back pressure driving small steam turbine (12) through a steam extraction heat storage pipeline (11).
7. The liquid compressed air energy storage system for utilizing exhaust steam waste heat of the air cooling unit according to claim 1, wherein the air cooling unit cylinder (24) is connected with the air cooling exhaust steam utilization heat storage heat exchanger (5) through an air cooling exhaust steam utilization pipeline (6).
8. The working method of the liquid compressed air energy storage system for utilizing exhaust steam waste heat of the air cooling unit as claimed in claim 1, which is characterized by comprising an energy storage stage and an energy release stage;
s11, extracting steam from a cylinder (24) of an air cooling unit, wherein a part of the steam is sent to a steam extraction and utilization heat storage heat exchanger (10) to exchange heat with a high-temperature heat storage working medium, the warmed working medium is sent to a steam extraction and utilization high-temperature working medium storage tank (7) to be stored, the other part of the steam drives a back pressure driving type small steam turbine (12) to push a multi-stage indirect cooling compressor (13), the exhaust steam of the cylinder (24) of the air cooling unit is sent to an air cooling exhaust steam utilization heat storage heat exchanger (5) to exchange heat with the high-temperature heat storage working medium, and heat energy is stored in the air cooling exhaust steam utilization high-temperature working medium storage tank (3) after heat exchange;
s12, the multi-stage indirect cooling compressor (13) compresses air to a high-pressure state, the high-pressure air is sent into the multi-stage compression heat collection heat exchanger (14) for heat exchange, and the heated working medium is stored into the compression heat utilization high-temperature working medium storage tank (15);
s13, enabling the compressed air subjected to heat exchange to enter a liquefaction heat exchanger (18) to absorb cold energy, and cooling to enter a cryogenic state;
s14, liquefying the compressed air in a cryogenic state into liquid air through a low-temperature expander (19) and a vapor-liquid separator (17), storing the liquid air in a liquid storage tank (21), and executing S13 by the non-liquefied compressed air;
the energy release phase comprises the following steps:
s21, liquefied air in the liquid storage tank (21) enters the vaporization heat exchanger (22) to carry out regenerative heating, a heat source of the vaporization heat exchanger (22) is compression heat in the compression heat utilization high-temperature working medium storage tank (15), and circulating working medium after heat release in the vaporization heat exchanger (22) enters the compression heat utilization low-temperature working medium storage tank (16);
s22, compressed air heated and vaporized in the vaporization heat exchanger (22) enters the air-cooled exhaust steam utilization energy release heat exchanger (2), the air-cooled exhaust steam utilization energy release heat exchanger (2) is heated for the second time, a heat source of the air-cooled exhaust steam utilization energy release heat exchanger is exhaust waste heat energy in the air-cooled exhaust steam utilization high-temperature working medium storage tank (3), and a circulating working medium after heat release enters the air-cooled exhaust steam utilization high-temperature working medium storage tank (4);
s23, the final compressed air subjected to secondary temperature rise enters a steam extraction and utilization heat storage heat exchanger (11), the heat storage energy stored in a steam extraction and utilization high-temperature working medium storage tank (7) is used for carrying out third temperature rise, and the circulating working medium subjected to heat release in the steam extraction and utilization heat storage heat exchanger (11) enters a steam extraction and utilization low-temperature working medium storage tank (8);
s24, the compressed air after three times of temperature rise enters a multi-stage energy storage power generation turbine (1), expands and works in the multi-stage energy storage power generation turbine (1), and supplies power to the outside.
9. The working method of the liquid compressed air energy storage system for utilizing exhaust steam waste heat of the air cooling unit according to claim 8, wherein steam is extracted from the air cooling unit cylinder (24) and is sent to the air cooling island (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111322847.8A CN114060112B (en) | 2021-11-09 | 2021-11-09 | Liquid compressed air energy storage method and system for utilizing exhaust waste heat of air cooling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111322847.8A CN114060112B (en) | 2021-11-09 | 2021-11-09 | Liquid compressed air energy storage method and system for utilizing exhaust waste heat of air cooling unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114060112A CN114060112A (en) | 2022-02-18 |
| CN114060112B true CN114060112B (en) | 2024-02-09 |
Family
ID=80274039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111322847.8A Active CN114060112B (en) | 2021-11-09 | 2021-11-09 | Liquid compressed air energy storage method and system for utilizing exhaust waste heat of air cooling unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114060112B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114893267B (en) * | 2022-04-08 | 2024-04-09 | 东南大学 | Liquid carbon dioxide energy storage system for high back pressure-extraction condensation cogeneration system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015000200A1 (en) * | 2013-07-04 | 2015-01-08 | 中国科学院过程工程研究所 | Cryogenic energy storage-based nuclear power peak load regulation system |
| KR20200088645A (en) * | 2019-01-15 | 2020-07-23 | 고등기술연구원연구조합 | System for Liquid Air Energy Storage using Liquefied Gas Fuel |
| CN111927584A (en) * | 2020-09-08 | 2020-11-13 | 西安热工研究院有限公司 | Liquid compressed air energy storage system and method for improving operation flexibility of thermal power generating unit |
| WO2021184773A1 (en) * | 2020-03-20 | 2021-09-23 | 西安西热节能技术有限公司 | Flexible peak regulation system and method for air energy storage by power plant |
-
2021
- 2021-11-09 CN CN202111322847.8A patent/CN114060112B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015000200A1 (en) * | 2013-07-04 | 2015-01-08 | 中国科学院过程工程研究所 | Cryogenic energy storage-based nuclear power peak load regulation system |
| KR20200088645A (en) * | 2019-01-15 | 2020-07-23 | 고등기술연구원연구조합 | System for Liquid Air Energy Storage using Liquefied Gas Fuel |
| WO2021184773A1 (en) * | 2020-03-20 | 2021-09-23 | 西安西热节能技术有限公司 | Flexible peak regulation system and method for air energy storage by power plant |
| CN111927584A (en) * | 2020-09-08 | 2020-11-13 | 西安热工研究院有限公司 | Liquid compressed air energy storage system and method for improving operation flexibility of thermal power generating unit |
Non-Patent Citations (1)
| Title |
|---|
| 基于液态空气储能技术的新型整体煤气化联合循环系统分析;赵明;陈星;梁俊宇;张晓磊;张会岩;肖睿;;化工进展(第S1期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114060112A (en) | 2022-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114060111B (en) | Liquid compressed air energy storage method and system for utilizing waste heat of circulating water of thermal power generating unit | |
| WO2021184773A1 (en) | Flexible peak regulation system and method for air energy storage by power plant | |
| CN114033515B (en) | Liquid compressed air energy storage method and system with injection converging device | |
| CN114198170B (en) | Carbon dioxide energy storage system based on double heat storage loops and working method thereof | |
| CN111140298B (en) | Distributed cogeneration compressed air energy storage system | |
| CN114109543B (en) | Liquid compressed air energy storage method and system utilizing bypass heat supplement of steam turbine | |
| CN112963207A (en) | Liquefied air hybrid energy storage and power generation integrated system and method | |
| CN216381532U (en) | Compressed air energy storage system | |
| CN111121389A (en) | Liquefied air energy storage and power generation system of deep coupling coal-fired unit | |
| CN111022139A (en) | Coal-fired generating set coupling liquefied air energy storage power generation system | |
| CN111305920A (en) | Steam-driven air energy storage peak regulation system and method | |
| CN114465254A (en) | Energy storage peak regulation system of coal-fired power plant | |
| CN212054842U (en) | Steam-driven air energy storage peak shaving system | |
| CN111927588A (en) | Organic Rankine cycle power generation system and method for realizing cascade utilization of waste heat of multi-energy complementary distributed energy system | |
| CN114060112B (en) | Liquid compressed air energy storage method and system for utilizing exhaust waste heat of air cooling unit | |
| CN115075903A (en) | Photo-thermal enhanced supercritical carbon dioxide energy storage system and method | |
| CN114033516B (en) | Liquid compressed air energy storage method and system for coupling high-back-pressure heat supply unit | |
| CN212837979U (en) | Organic Rankine cycle power generation system capable of realizing waste heat gradient utilization | |
| CN112254369A (en) | Liquid air energy storage system adopting absorption type air inlet precooling | |
| CN116576398A (en) | Carbon dioxide trapping energy storage peak regulation system based on cold energy utilization of liquefied natural gas | |
| CN116105386A (en) | Photo-thermal composite ammonia absorption type multi-energy combined supply system | |
| CN115875243A (en) | Energy cascade utilization system for compressed gas energy storage | |
| CN111927584B (en) | Liquid compressed air energy storage system and method for improving operation flexibility of thermal power generating unit | |
| CN112112694B (en) | Liquid air energy storage system and method capable of self-dissipating compression heat | |
| CN210977618U (en) | Coal-fired generating set coupling liquefied air energy storage power generation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |