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CN115234324A - Liquefied air energy storage system for commercial buildings and working method thereof - Google Patents

Liquefied air energy storage system for commercial buildings and working method thereof Download PDF

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Publication number
CN115234324A
CN115234324A CN202210712596.2A CN202210712596A CN115234324A CN 115234324 A CN115234324 A CN 115234324A CN 202210712596 A CN202210712596 A CN 202210712596A CN 115234324 A CN115234324 A CN 115234324A
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CN
China
Prior art keywords
storage tank
air
liquefied
compressor
liquefied air
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.)
Pending
Application number
CN202210712596.2A
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Chinese (zh)
Inventor
姜旭东
叶成
王岳
邱健
夏栓
桂璐廷
王晨晨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Nuclear Engineering Research and Design Institute Co Ltd
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Shanghai Nuclear Engineering Research and Design Institute Co Ltd
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Application filed by Shanghai Nuclear Engineering Research and Design Institute Co Ltd filed Critical Shanghai Nuclear Engineering Research and Design Institute Co Ltd
Priority to CN202210712596.2A priority Critical patent/CN115234324A/en
Publication of CN115234324A publication Critical patent/CN115234324A/en
Pending legal-status Critical Current

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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
    • F01K13/00—General layout or general methods of operation of complete plants
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0012—Primary atmospheric gases, e.g. air
    • 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
    • F01K13/02—Controlling, e.g. stopping or starting
    • 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
    • F01K21/00—Steam engine plants not otherwise provided for
    • 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
    • F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
    • 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
    • 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
    • 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
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/004—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by flash gas recovery
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/0045—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by vaporising a liquid return stream
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0201—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using only internal refrigeration means, i.e. without external refrigeration
    • F25J1/0202—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using only internal refrigeration means, i.e. without external refrigeration in a quasi-closed internal refrigeration loop
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
    • F25J1/0235—Heat exchange integration
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
    • F25J1/0235—Heat exchange integration
    • F25J1/0242—Waste heat recovery, e.g. from heat of 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0244—Operation; Control and regulation; Instrumentation
    • F25J1/0245—Different modes, i.e. 'runs', of operation; Process control
    • F25J1/0251—Intermittent or alternating process, so-called batch process, e.g. "peak-shaving"
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/24—Processes or apparatus using other separation and/or other processing means using regenerators, cold accumulators or reversible heat exchangers
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/04—Compressor cooling arrangement, e.g. inter- or after-stage cooling or condensate removal
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/30—Compression of the feed stream
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/90—Hot gas waste turbine of an indirect heated gas for power generation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

The utility model provides a liquefied air energy storage system for commercial buildings and a working method thereof, which mainly comprises a compressor, a cooler, a gas-liquid separator, a liquid air storage tank, a cryogenic pump, a gasifier, a reheater, an expander, a generator, a heat storage tank and a cold storage tank; in the valley electricity time period, the ambient air is compressed in a multi-stage mode through a compressor, is cooled in a multi-stage mode through a cooler, and then is stored into a liquid air storage tank through a gas-liquid separator; in the air compression liquefaction process, the generated heat is stored in the heat storage tank; the heat can directly or indirectly provide hot water and hot air for the building; in off-peak electricity periods, the liquefied air stored in the liquid air storage tank is pressurized by the cryogenic pump, then enters the expansion machine for multistage expansion after being absorbed by the gasifier and the reheater, and the expansion machine drives the generator to generate electricity so as to provide power supply for the building.

Description

Liquefied air energy storage system for commercial building and working method thereof
Technical Field
The disclosure relates to the technical field of liquefied energy storage, in particular to a liquefied air energy storage system and method for commercial buildings.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
The energy storage technology is simply a technology of storing excess energy and releasing the energy when needed. Different energy storage systems can be selected according to different application scenes, and the energy storage systems can be mainly divided into electrical energy storage, mechanical energy storage, chemical energy storage and thermal energy storage according to the principle of the energy storage technology and the difference of the storage forms.
Currently, pumped storage and electrochemical storage account for more than 90% of the global energy storage market. The liquefied air energy storage is a branch of compressed air energy storage, and compared with pumped storage and electrochemical energy storage, the liquefied air energy storage has the advantages of low initial investment, high energy storage density, long service life, flexible site selection and the like. Because the number of equipment of the liquefied air energy storage system is large and the system is relatively complex, the conventional liquefied air energy storage circulation efficiency is low, generally ranging from 40% to 50%, and the application scene is limited.
The liquefied air energy storage process can be mainly divided into an air liquefaction process, an energy storage process and an electric power recovery process. In the air liquefaction process, air is compressed and liquefied to release energy; in the process of electric power recovery, the liquefied air needs to absorb heat to expand to generate cold. Therefore, the liquefied air energy storage system can generate considerable heat and cold in the circulation process. And the cold and heat are not effectively utilized, so that the efficiency of the whole system is influenced.
Modern commercial buildings generally have electricity, heat and cold requirements in daily operation and maintenance, and basically depend on electricity supply directly or indirectly. Due to the perfection of the time-of-use electricity price mechanism, the peak-to-valley electricity price difference is further enlarged, and therefore the operation and maintenance cost of commercial buildings is increased.
Disclosure of Invention
The liquefied air energy storage system realizes electricity, heat and cold poly-generation by storing energy in the air liquefaction process and releasing energy by utilizing air gasification expansion, and reduces production and living costs by storing energy by utilizing valley electricity at night and releasing energy in off-valley electricity periods in daytime.
According to some embodiments, the following technical scheme is adopted in the disclosure:
the utility model provides a liquefied air energy storage system for commercial building, includes hot water system, heating and ventilating system, energy storage system and energy release system, energy storage system includes multistage compressor, multistage cooler, liquefier, vapour and liquid separator and the liquefied air holding vessel that connects gradually through the pipeline.
The multi-stage cooler is connected with the heat storage tank and is used for storing waste heat generated in the compression process of the compressor after being cooled in the cooler;
the energy release system comprises a liquefied air storage tank, a cryogenic pump, a gasifier, a multi-stage reheater and a multi-stage expander which are sequentially connected through pipelines; the multi-stage reheater is connected with the cold storage tank and used for storing cold energy generated in the reheater.
According to other embodiments, the following technical scheme is adopted in the disclosure:
a method of operating a liquefied air energy storage system for commercial buildings, comprising:
and during the valley electricity period:
the method comprises the following steps of compressing ambient air through a compressor and a cooler in a multi-stage mode, pressurizing, transferring waste heat generated in the compression process to a heat storage tank through the cooler for storage, enabling the compressed air to enter a liquefier for further cooling and liquefying, and delivering the liquefied air to a liquefied air storage tank for storage after liquefaction.
Wherein, the air which is not liquefied in the gas-liquid separator is sent back to the inlet of the compressor, compressed, cooled and liquefied again, and then is sent to the liquefied air storage tank for storage.
In a further aspect of the present invention,
in the off-valley electricity period:
liquid air in the liquefied air storage tank is conveyed to the gasifier through the cryogenic pump, the liquid air absorbs a large amount of heat in the gasifier, and the part of heat and waste heat generated by the liquefier in the valley electricity period form coupling utilization; after being gasified in the gasifier, the liquid air is heated by the reheater and then enters the expander to be used for work and power generation.
Compared with the prior art, this disclosed beneficial effect does:
the utility model provides a commercial building's liquefied air energy storage system, this system turn into low price electric energy liquefied air at off-peak electricity time period and save, and the liquefied air inflation electricity generation that will save in off-peak electricity time period effectively utilizes the heat and the cold volume that produce simultaneously in liquefaction and the gasification process, provides electric power, hot water, hot-blast, cold wind for commercial building. The equipment used by the system is mature in technology and high in reliability; no inflammable and explosive substances exist, and the safety is high; the system has a service life of 20-30 years, and can fully utilize peak-valley electricity price difference after long-term operation, thereby obviously reducing the building operation and maintenance cost; the multipoint popularization can improve the consumption capacity of the power grid in the valley period, reduce the load fluctuation of the power grid and improve the stability of the power grid.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
FIG. 1 is a connection diagram of a liquefied air energy storage system according to the disclosure
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example 1
In one embodiment of the present disclosure, a liquefied air energy storage system for commercial buildings is provided, which includes a hot water system, a heating and ventilation system, an energy storage system, and an energy release system, as shown in fig. 1, the energy storage system includes a multistage compressor 1, a multistage cooler 2, a liquefier 3, a gas-liquid separator 4, and a liquefied air storage tank 5, which are sequentially connected through a pipeline.
The multistage cooler 2 is connected with the heat storage tank 10 and is used for storing waste heat generated in the compression process of the compressor 1 after being cooled in the cooler 2; the connection mode of multi-stage compressor and multi-stage cooler is for interval connection in proper order, and the input of cooler is connected to the output of compressor promptly, the input of next stage compressor is connected to the output of cooler, and the output of next stage compressor has the input of cooler again to this connects gradually multistage, just carries out multistage compression and multistage cooling with ambient air.
The energy release system comprises a liquefied air storage tank 5, a cryogenic pump 6, a gasifier 7, a multi-stage reheater 8 and a multi-stage expander 9 which are connected in sequence through pipelines; the multi-stage reheater 8 is connected to the cold storage tank 11, and is configured to store cold energy generated by the reheater 8.
The connection mode of the multistage reheater and the multistage expander is that the output end of the reheater is connected with the input end of the expander, the output end of the expander is connected with the input end of the next-stage reheater, and the output end of the next-stage reheater is connected with the input end of the expander, so that the reheater and the expander are sequentially connected in a multistage mode.
As shown in fig. 1, a manual regulating valve is provided between the gas-liquid separator and the liquefied air storage tank, and a manual regulating valve is provided between the liquefied air storage tank and the cryopump. The manual regulating valve is used for regulating the flow of the liquefied air, and has closing and opening functions for respectively controlling energy storage and energy release. When energy is stored, an inlet storage tank inlet valve between the gas-liquid separator and the liquefied air storage tank is opened; when energy is released, the manual valve at the outlet between the liquefied air storage tank and the cryogenic pump is opened.
The liquefier 3 has two inputs and two outputs, and its effect is that the back is cooled and liquefied to liquefier 3 compressed air, carries out gas-liquid separation in the gas-liquid separator 4 through the input of liquefier 3 output, then inputs to liquefied air storage jar 5 through the output of gas-liquid separator 4.
The other output end of the gas-liquid separator 4 is connected with the other input end of the liquefier 3, and the other output end of the liquefier 3 is connected with the inlet of the compressor 1, and is used for sending the non-liquefied compressed air back to the compressor 1 to be compressed, cooled and liquefied.
That is, the gas-liquid separator 4 can receive the liquefied air from the liquefier 3 and can output the non-liquefied air to return to the liquefier, and the liquefier sends the non-liquefied air to the inlet of the compressor to be compressed, cooled and liquefied again.
A hot water system and a heating and ventilation system are arranged in the building, and the heat storage tank 10 is connected with the hot water system of the building to provide hot water at the temperature of 40-60 ℃ for the building; the heat storage tank 10 is also connected with a heating and ventilation system of the building to provide warm air for the building in winter. The multistage compressor is connected with multistage cooler, specifically does:
the output of compressor connects the input of cooler, the input of next stage compressor is connected to the output of cooler, the input of next stage cooler is connected to the output of next stage compressor to this connects gradually.
The cold storage tank 11 is connected with a heating and ventilation system of the building and provides cold air for various rooms of the building in summer; and cold air is provided for the data machine room in winter.
The whole system is cyclically operated in a cycle of 24 hours.
Example 2
Another embodiment of the present disclosure provides a working method of a liquefied air energy storage system for commercial buildings, based on a system composed of a compressor, a cooler, a gas-liquid separator, a liquid air storage tank, a cryogenic pump, a gasifier, a reheater, an expander, a generator, a heat storage tank, and a cold storage tank, the working process of the system in 24-hour cycle operation is realized; the energy storage system comprises a multistage compressor, a multistage cooler, a liquefier, a gas-liquid separator and a liquefied air storage tank which are sequentially connected through pipelines.
The multi-stage cooler is connected with the heat storage tank and is used for storing waste heat generated in the compression process of the compressor after being cooled in the cooler;
the energy release system comprises a liquefied air storage tank, a cryogenic pump, a gasifier, a multi-stage reheater and a multi-stage expander which are sequentially connected through pipelines; and the multi-stage reheater is connected with the cold storage tank and used for storing cold energy generated in the reheater. The multi-stage cooler is connected with the heat storage tank and is used for storing waste heat generated in the compression process of the compressor after being cooled in the cooler; the connection mode of multi-stage compressor and multi-stage cooler is for interval connection in proper order, and the input of cooler is connected to the output of compressor promptly, the input of next stage compressor is connected to the output of cooler, and the output of next stage compressor has the input of cooler again to this connects gradually multistage, just carries out multistage compression and multistage cooling with ambient air.
The energy release system comprises a liquefied air storage tank, a cryogenic pump, a gasifier, a multi-stage reheater and a multi-stage expander which are sequentially connected through pipelines; and the multi-stage reheater is connected with the cold storage tank and used for storing cold energy generated in the reheater.
The connection mode of the multistage reheater and the multistage expander is that the output end of the reheater is connected with the input end of the expander, the output end of the expander is connected with the input end of the next-stage reheater, and the output end of the next-stage reheater is connected with the input end of the expander, so that the reheater and the expander are sequentially connected in a multistage mode.
Dividing a valley power time period and a non-valley power time period when the electric vehicle works;
and during the valley electricity period:
the method comprises the steps that the ambient air is compressed in multiple stages by a compressor and a cooler, then is pressurized, waste heat generated in the compression process is transferred to a heat storage tank through the cooler to be stored, the compressed air enters a liquefier to be further cooled and liquefied, and the liquefied air is conveyed to a liquefied air storage tank to be stored after being liquefied.
Wherein, the air which is not liquefied in the gas-liquid separator is sent back to the inlet of the compressor, compressed, cooled and liquefied again, and then is sent to the liquefied air storage tank for storage.
In the air compression liquefaction process, the generated heat is stored in the heat storage tank; the part of heat can directly or indirectly provide hot water and hot air for the building.
Off-valley electricity period:
liquid air in the liquefied air storage tank is conveyed to the gasifier through the cryogenic pump, the liquid air absorbs a large amount of heat in the gasifier, and the part of heat and waste heat generated by the liquefier in the valley electricity period form coupling utilization; after being gasified in the gasifier, the liquid air is heated by the reheater and then enters the expander to be used for work and power generation, so that power supply is provided for buildings.
The cold energy generated when the liquefied air absorbs heat through the reheater is stored in the cold storage tank; the part of cold energy can directly or indirectly provide cold air for buildings and is used for refrigerating offices, data machine rooms and other places.
The specific implementation mode is as follows:
in the valley electricity period, ambient air is compressed to 25 ℃ 26222 through a compressor and a cooler after 3 stages of compression, and waste heat generated in the compression process is transferred to the heat storage tank through the cooler for storage. The compressed air then enters a liquefier for further cooling liquefaction and a portion of the non-liquefied air is returned to the compressor inlet in a gas-liquid separator. The liquefied air state parameter at the outlet of the gas-liquid separator was-193 ℃ 21222, and the liquefied air was stored in the liquefied air storage tank.
During off-peak electricity periods, the liquid air in the liquefied air storage tank is conveyed to the gasifier 7 through the cryogenic pump, and the liquid air absorbs a large amount of heat in the gasifier, and the part of heat is coupled with the waste heat generated by the liquefier during off-peak electricity periods. The heat released in the air liquefaction process is stored through the heat storage medium, and the part of heat can be absorbed and utilized in the gasification process, so that coupling utilization is realized; after being gasified in the gasifier, the liquid air is heated by the reheater and then enters the expander to be used for work and power generation. The cold energy generated by the air passing through the reheater is stored in the cold storage tank.
The heat storage tank is connected with a hot water system of the building to provide hot water of 40-60 ℃ for the building; the heat storage tank is simultaneously connected with a heating and ventilation system of the building to provide warm air for the building in winter.
The cold storage tank is connected with a heating and ventilation system of the building, and provides cold air for various rooms of the building in summer; and cold air is provided for the data machine room in winter.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.

Claims (10)

1. A liquefied air energy storage system for commercial buildings comprises a hot water system, a heating and ventilation system, an energy storage system and an energy release system, and is characterized in that:
the energy storage system comprises a multistage compressor, a multistage cooler, a liquefier, a gas-liquid separator and a liquefied air storage tank which are sequentially connected through pipelines.
The multi-stage cooler is connected with the heat storage tank and is used for storing waste heat generated in the compression process of the compressor after being cooled in the cooler;
the energy release system comprises a liquefied air storage tank, a cryogenic pump, a gasifier, a multi-stage reheater and a multi-stage expander which are sequentially connected through pipelines; the multi-stage reheater is connected with the cold storage tank and used for storing cold energy generated in the reheater.
2. The liquefied air energy storage system for commercial buildings according to claim 1, wherein a manual regulating valve is provided between the gas-liquid separator and the liquefied air storage tank.
3. The liquefied air energy storage system for commercial buildings according to claim 1, wherein a manual regulating valve is provided between the liquefied air storage tank and the cryogenic pump.
4. The liquefied air energy storage system for commercial buildings according to claim 1, wherein the compressed air is cooled and liquefied by the liquefier, and then is input into the gas-liquid separator through the output end of the liquefier for gas-liquid separation, and then is input into the liquefied controller storage tank through the output end of the gas-liquid separator.
5. The liquefied air energy storage system for commercial buildings as claimed in claim 1, wherein another output of said gas-liquid separator is connected to another input of a liquefier, and another output of said liquefier is connected to an inlet of said compressor for returning non-liquefied compressed air to said compressor for compression, cooling and liquefaction.
6. A liquefied air energy storage system for commercial buildings according to claim 1, wherein said thermal storage tank is connected to said hot water system, and said thermal storage tank is simultaneously connected to said heating and ventilation system.
7. The liquefied air energy storage system for commercial buildings according to claim 1, wherein the cold storage tank is connected to the heating and ventilation system, and the multi-stage compressor is connected to a multi-stage cooler, specifically:
the output of compressor connects the input of cooler, the input of next stage compressor is connected to the output of cooler, the input of next stage cooler is connected to the output of next stage compressor to this connects gradually.
8. A method of operating a liquefied air energy storage system for commercial buildings, comprising:
and during the valley electricity period:
the method comprises the following steps of compressing ambient air through a compressor and a cooler in a multi-stage mode, pressurizing, transferring waste heat generated in the compression process to a heat storage tank through the cooler for storage, enabling the compressed air to enter a liquefier for further cooling and liquefying, and delivering the liquefied air to a liquefied air storage tank for storage after liquefaction.
9. The method as claimed in claim 8, wherein the air that is not liquefied in the gas-liquid separator is sent back to the inlet of the compressor, compressed, cooled and liquefied again, and then sent to the liquefied air storage tank for storage.
10. The method of operating a liquefied air energy storage system for use in commercial buildings according to claim 8, further comprising:
off-valley electricity period:
liquid air in the liquefied air storage tank is conveyed to the gasifier through the cryogenic pump, the liquid air absorbs a large amount of heat in the gasifier, and the part of heat and waste heat generated by the liquefier in the valley electricity period form coupling utilization; after being gasified in the gasifier, the liquid air is heated by the reheater and then enters the expander to be used for work and power generation.
CN202210712596.2A 2022-06-22 2022-06-22 Liquefied air energy storage system for commercial buildings and working method thereof Pending CN115234324A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108194153A (en) * 2018-02-27 2018-06-22 葛洲坝中科储能技术有限公司 Promote the method and device of compressed-air energy-storage system energy conversion efficiency
CN210977616U (en) * 2019-11-27 2020-07-10 中国科学院工程热物理研究所 Supercritical compressed air energy storage system
CN112963207A (en) * 2021-02-02 2021-06-15 上海电力大学 Liquefied air hybrid energy storage and power generation integrated system and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108194153A (en) * 2018-02-27 2018-06-22 葛洲坝中科储能技术有限公司 Promote the method and device of compressed-air energy-storage system energy conversion efficiency
CN210977616U (en) * 2019-11-27 2020-07-10 中国科学院工程热物理研究所 Supercritical compressed air energy storage system
CN112963207A (en) * 2021-02-02 2021-06-15 上海电力大学 Liquefied air hybrid energy storage and power generation integrated system and method

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