CN115234329A - Closed-cycle compression energy storage power generation system and operation method thereof - Google Patents
Closed-cycle compression energy storage power generation system and operation method thereof Download PDFInfo
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- CN115234329A CN115234329A CN202211018186.4A CN202211018186A CN115234329A CN 115234329 A CN115234329 A CN 115234329A CN 202211018186 A CN202211018186 A CN 202211018186A CN 115234329 A CN115234329 A CN 115234329A
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- 238000007906 compression Methods 0.000 title claims abstract description 119
- 230000006835 compression Effects 0.000 title claims abstract description 117
- 238000004146 energy storage Methods 0.000 title claims abstract description 42
- 238000010248 power generation Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005338 heat storage Methods 0.000 claims description 68
- 239000007788 liquid Substances 0.000 claims description 22
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 6
- AFAUWLCCQOEICZ-UHFFFAOYSA-N helium xenon Chemical compound [He].[Xe] AFAUWLCCQOEICZ-UHFFFAOYSA-N 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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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
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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
- F01K13/02—Controlling, e.g. stopping or starting
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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
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/006—Accumulators and steam compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/02—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of multiple-expansion type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/12—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
A closed cycle compression energy storage power generation system and an operation method thereof belong to the technical field of compression energy storage power generation, and comprise a compression subsystem, a compression heat collection subsystem, an air storage subsystem, a compression heat feedback subsystem and an expansion subsystem, wherein the compression subsystem is connected with the compression heat collection subsystem, the compression heat collection subsystem is connected with the air storage subsystem, the compression heat collection subsystem is connected with the compression heat feedback subsystem, the compression heat feedback subsystem is connected with the air storage subsystem, the compression heat feedback subsystem is connected with the expansion subsystem, the expansion subsystem is connected with the air storage subsystem, and the air storage subsystem is connected with the compression subsystem.
Description
Technical Field
The invention relates to a closed type circulating compression energy storage power generation system, and belongs to the technical field of compression energy storage power generation.
Background
The construction of the power generation by new energy sources such as wind energy, solar energy, photovoltaic energy and the like becomes an important component of future power supply, but the intermittency, the volatility and the unpredictability are key problems to be solved urgently by renewable energy sources, and the advanced large-scale energy storage technology is an effective way for solving the problem of power grid-connected access of the renewable energy sources. The compressed air energy storage has the advantages of large scale, long service life, cleanness, environmental protection, safety, reliability and the like, and is one of large-scale energy storage technologies with the most development prospect in the future.
The traditional compressed air energy storage is that when electricity consumption is in the valley, redundant electric energy is compressed air through a compressor and is stored in natural underground salt cavern and other air storage devices, compression heat is stored in a heat storage tank, when electricity consumption is in the peak, heat exchange is carried out by utilizing a high-pressure air storage and heat storage tank heat exchange liquid medium or high-pressure air storage before entering a turboexpander is heated by utilizing fuel, and the high-temperature high-pressure air drives the turboexpander to do work for power generation. Although the natural underground salt cavern has large gas storage scale and low cost, the natural underground salt cavern seriously depends on a special geographical position and is difficult to popularize and apply on a large scale.
Therefore, it is necessary to provide a novel closed-cycle compression energy storage power generation system to get rid of the limitation of the geographic environment on compressed air energy storage.
Disclosure of Invention
The present invention has been developed in order to solve the problems of the conventional compressed air energy storage, which relies on natural underground salt caverns and other gas storage devices and has high restrictions on the geographical environment and high pressure gas storage volume, and a brief summary of the present invention is provided below to provide a basic understanding of some aspects of the present invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention.
The technical scheme of the invention is as follows:
the first scheme is that the closed cycle compression energy storage power generation system comprises a compression subsystem, a compression heat collection subsystem, a gas storage subsystem, a compression heat feedback subsystem and an expansion subsystem;
the outlet of the compression subsystem is connected with the first collection inlet of the compression heat collection subsystem, the first collection outlet of the compression heat collection subsystem is connected with the first gas storage inlet of the gas storage subsystem, the second collection inlet of the compression heat collection subsystem is connected with the first feedback outlet of the compression heat feedback subsystem, the second collection outlet of the compression heat collection subsystem is connected with the first feedback inlet of the compression heat feedback subsystem, the second feedback inlet of the compression heat feedback subsystem is connected with the first gas storage outlet of the gas storage subsystem, the second feedback outlet of the compression heat feedback subsystem is connected with the inlet of the expansion subsystem, the outlet of the expansion subsystem is connected with the second gas storage inlet of the gas storage subsystem, and the second gas storage outlet of the gas storage subsystem is connected with the inlet of the compression subsystem.
Preferably, the following components: the gas storage subsystem comprises a low-pressure gas storage chamber and a high-pressure gas storage chamber, an inlet of the low-pressure gas storage chamber is connected with an outlet of the high-pressure gas storage chamber, the low-pressure gas storage chamber is provided with a second gas storage inlet and a second gas storage outlet, the high-pressure gas storage chamber is provided with a first gas storage inlet and a first gas storage outlet, and the low-pressure gas storage chamber is connected with a vacuum pump and an inflation module.
Preferably: the compression subsystem comprises a compression motor and a compressor, and the compression motor is electrically connected with the compressor;
the compression heat collection subsystem comprises a cooler and a high-temperature heat storage tank, an outlet of the cooler is connected with an inlet of the high-temperature heat storage tank, the cooler is provided with a first collection inlet, a first collection outlet and a second collection inlet, and the high-temperature heat storage tank is provided with a second collection outlet.
Preferably, the following components: the compression heat feedback subsystem comprises a low-temperature heat storage tank and a heat exchanger, wherein an inlet of the low-temperature heat storage tank is connected with an outlet of the heat exchanger, the low-temperature heat storage tank is provided with a first feedback outlet, and the heat exchanger is provided with a first feedback inlet, a second feedback inlet and a second feedback outlet.
Preferably, the following components: the expansion subsystem comprises a turbine expansion machine and a generator, and the turbine expansion machine is electrically connected with the generator.
The second scheme is that the closed cycle compression energy storage power generation system comprises a compression subsystem, a compression heat collection subsystem, a gas storage subsystem, a compression heat feedback subsystem and an expansion subsystem;
the outlet of the compression subsystem is connected with the first collection inlet of the compression heat collection subsystem, the first collection outlet of the compression heat collection subsystem is connected with the first gas storage inlet of the gas storage subsystem, the second collection inlet of the compression heat collection subsystem is connected with the first feedback outlet of the compression heat feedback subsystem, the second collection outlet of the compression heat collection subsystem is connected with the first feedback inlet of the compression heat feedback subsystem, the second feedback inlet of the compression heat feedback subsystem is connected with the first gas storage outlet of the gas storage subsystem, the second feedback outlet of the compression heat feedback subsystem is connected with the inlet of the expansion subsystem, the outlet of the expansion subsystem is connected with the second gas storage inlet of the gas storage subsystem, and the second gas storage outlet of the gas storage subsystem is connected with the inlet of the compression subsystem.
Preferably, the following components: the compression subsystem includes a first motor, a first compressor, and a second compressor;
the compression heat collection subsystem comprises a first cooler, a second cooler and a first high-temperature heat storage tank;
the first motor, the first compressor and the second compressor are sequentially connected in series, the outlet of the first compressor is connected with the first collecting inlet of the first cooler, the inlet of the first compressor is connected with the second gas storage outlet of the low-pressure gas storage chamber, the outlet of the second compressor is connected with the left inlet of the second cooler, and the inlet of the second compressor is connected with the right outlet of the first cooler; the first collecting outlet of the second cooler is connected with the first gas storage inlet of the high-pressure gas storage chamber;
the right inlet of the first cooler and the second collecting inlet of the second cooler are both connected with the first feedback outlet of the compression heat feedback subsystem, and the left outlets of the first cooler and the second cooler are both connected with the inlet of the first high-temperature heat storage tank.
Preferably, the following components: the compression heat feedback subsystem comprises a first low-temperature heat storage tank, a first heat exchanger and a second heat exchanger;
the expansion subsystem comprises a first turbine expander, a second turbine expander and a first generator, and the first generator, the first turbine expander and the second turbine expander are sequentially connected in series;
left inlets of the first heat exchanger and the second heat exchanger are converged to form a first feedback inlet, the first feedback inlet is connected with a second collecting outlet of the first high-temperature heat storage tank, a second feedback outlet of the first heat exchanger is connected with an inlet of the first turbo expander, right outlets of the first heat exchanger and the second heat exchanger are connected with an inlet of the first low-temperature heat storage tank, the first low-temperature heat storage tank is provided with a first feedback outlet, a second feedback inlet of the second heat exchanger is connected with a first gas storage outlet of the high-pressure gas storage chamber, an outlet of the second turbo expander is connected with a right inlet of the first heat exchanger, and an inlet of the second turbo expander is connected with a left outlet of the second heat exchanger.
Preferably: the high-pressure gas storage device is characterized in that a first self-operated regulating valve and a second stop valve are installed on a connecting pipeline of a first compressor and a second gas storage outlet, a first stop valve is installed on a connecting pipeline of a second gas storage inlet and a first turbine expansion machine, a seventh stop valve is installed at an inlet of a first high-temperature heat storage tank, a second circulating water pump and an eighth stop valve are installed at an outlet of the first high-temperature heat storage tank in sequence, a second self-operated regulating valve is installed at an inlet of the second turbine expansion machine, a fifth stop valve is installed at an inlet of the first low-temperature heat storage tank, a first circulating water pump and a sixth stop valve are installed at a first feedback outlet of the first low-temperature heat storage tank in sequence, a third stop valve and a fourth stop valve are installed at a first gas storage inlet and a first gas storage outlet of a high-pressure gas storage chamber respectively, a first check valve is installed on a connecting pipeline of the second gas storage inlet and the first turbine expansion machine, and a second check valve is installed at an outlet of the second compressor.
Preferably, the following components: the vacuum pump is connected with the low-pressure gas storage chamber through the air exhaust check valve and the air exhaust stop valve, the inflation module comprises an inflation bottle set and a filter, the inflation bottle set is connected with the filter through the inflation stop valve, and the filter is connected with the low-pressure gas storage chamber.
The second scheme is an operation method of the closed-cycle compression energy-storage power generation system, which is realized based on the second scheme and comprises the following steps:
step 1, opening an air extraction stop valve, starting a vacuum pump, and closing the vacuum pump and the air extraction stop valve after air in a closed circulation loop is exhausted;
step 2, opening an inflation stop valve, injecting a circulating working medium to be operated into the low-pressure gas storage chamber, filling the circulating working medium into the closed circulating loop, and closing the inflation stop valve after the operating pressure is reached;
step 4, controlling the inlet pressure and temperature of the equipment by the first compressor, the second compressor, the first turbo expander and the second turbo expander;
opening the sixth stop valve and the seventh stop valve, and starting the first circulating pump; starting a first motor according to a set operation rotating speed, driving a first compressor and a second compressor to rotate and compress a circulating working medium, enabling the compressed high-temperature high-pressure circulating working medium to enter a high-pressure gas storage chamber after heat exchange through a first heat exchanger and a second heat exchanger, enabling a heat exchange liquid medium for obtaining heat energy to enter a first high-temperature heat storage tank, completing an energy storage process, and closing a second stop valve, a third stop valve, a sixth stop valve, a seventh stop valve and the first motor;
step 6, opening the first stop valve and the fourth stop valve during energy release, and adjusting the second self-supporting regulating valve to control the inlet temperature and pressure of the first turbo expander and the second turbo expander;
opening the fifth stop valve and the eighth stop valve, and starting the second circulating pump;
the circulating working medium is changed into a high-temperature and high-pressure working medium after being subjected to heat exchange by the first heat exchanger and the second heat exchanger, the high-temperature and high-pressure working medium enters the first turbo expander and the second turbo expander to do work to drive the first generator to generate electricity, a heat exchange liquid medium which finishes the heat exchange process enters the first low-temperature heat storage tank to be stored, the energy release process is finished, and the first stop valve, the fourth stop valve, the fifth stop valve and the eighth stop valve are closed.
The invention has the following beneficial effects:
1. the invention is different from the prior open-cycle compressed air energy storage system, provides a closed-cycle compressed energy storage power generation system, and has high response speed;
2. the circulating working medium adopts the helium-xenon mixed gas, the characteristics of safety, compactness and the like of a helium-xenon closed Brayton cycle power generation system can be perfectly exerted, and the requirement of the traditional compressed air energy storage system on high-pressure gas storage volume is greatly reduced under the condition of the same power grade;
3. the invention has small occupied space, no dependence on special geographical environment, large energy storage capacity, strong site adaptability and wide development prospect.
Drawings
FIG. 1 is a system diagram of a first embodiment;
FIG. 2 is a system diagram of a second embodiment;
FIG. 3 is a control diagram of the second embodiment;
in the figure, 1 is a compression subsystem, 2 is a compression heat collection subsystem, 3 is a gas storage subsystem, 4 is a compression heat feedback subsystem, 5 is an expansion subsystem, 21 is a first collection inlet, 22 is a first collection outlet, 23 is a second collection inlet, 24 is a second collection outlet, 31 is a low pressure gas storage chamber, 32 is a first gas storage outlet, 33 is a second gas storage inlet, 34 is a second gas storage outlet, 41 is a first feedback outlet, 42 is a first feedback inlet, 43 is a second feedback inlet, 44 is a second feedback outlet, 1-1 is a compression motor, 1-2 is a compressor, 2-1 is a cooler, 2-2 is a high temperature heat storage tank, 3-1 is a low pressure gas storage chamber, 3-2 parts of a high-pressure air storage chamber, 3-3 parts of a vacuum pump, 3-4 parts of an air charging module, 3-41 parts of an air charging bottle group, 3-42 parts of a filter, 4-1 parts of a low-temperature heat storage tank, 4-2 parts of a heat exchanger, 5-1 parts of a turbo expander, 5-2 parts of a generator, 101 parts of a first motor, 102 parts of a first compressor, 103 parts of a second compressor, 201 parts of a first cooler, 202 parts of a second cooler, 203 parts of a first high-temperature heat storage tank, 401 parts of a first low-temperature heat storage tank, 402 parts of a first heat exchanger, 403 parts of a second heat exchanger, 501 parts of a first turbo expander, 502 parts of a first generator, 503 parts of a second turbo expander and 61 parts of a first self-operated regulating valve, 62-a second stop valve, 63-a first stop valve, 64-a first check valve, 65-a seventh stop valve, 66-an eighth stop valve, 67-a second self-operated regulating valve, 68-a fifth stop valve, 69-a sixth stop valve, 610-a third stop valve, 611-a fourth stop valve, 612-a second check valve, 613-an air suction check valve, 614-an air suction stop valve, 615-an air charging stop valve, 71-a second circulating water pump and 72-a first circulating water pump.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The connection mentioned in the invention is divided into fixed connection and detachable connection, the fixed connection is non-detachable connection and comprises but is not limited to folding connection, rivet connection, bonding connection, welding connection and other conventional fixed connection modes, the detachable connection comprises but is not limited to threaded connection, buckle connection, pin connection, hinge connection and other conventional detaching modes, when the specific connection mode is not clearly limited, at least one connection mode can be found in the existing connection modes by default to realize the function, and the skilled person can select according to the needs. For example: the fixed connection selects welding connection, and the detachable connection selects hinge connection.
The first embodiment is as follows: the embodiment is described with reference to fig. 1, and the closed cycle compression energy storage power generation system of the embodiment includes a compression subsystem 1, a compression heat collection subsystem 2, a gas storage subsystem 3, a compression heat feedback subsystem 4 and an expansion subsystem 5;
the compression heat feedback subsystem 4 comprises a low-temperature heat storage tank 4-1 and a heat exchanger 4-2, an inlet of the low-temperature heat storage tank 4-1 is connected with an outlet of the heat exchanger 4-2, the compression heat feedback subsystem 4 is used for heating a high-pressure circulating liquid working medium, and heat is stored in the low-temperature storage tank 4-1;
the compression subsystem 1 comprises a compression motor 1-1 and a compressor 1-2, and the compression motor 1-1 is electrically connected with the compressor 1-2; the compression subsystem 1 is used for compressing closed cycle working medium;
the compression heat collection subsystem 2 comprises a cooler 2-1 and a high-temperature heat storage tank 2-2, an outlet of the cooler 2-1 is connected with an inlet of the high-temperature heat storage tank 2-2 and is used for cooling a high-temperature high-pressure liquid working medium compressed by the compressor 1-2, and heat is stored in the high-temperature heat storage tank 2-2;
the gas storage subsystem 3 comprises a low-pressure gas storage chamber 3-1 and a high-pressure gas storage chamber 3-2, the low-pressure gas storage chamber 31 is connected with a vacuum pump 3-3 and an inflation module 3-4, and an inlet of the low-pressure gas storage chamber 3-1 is connected with an outlet of the high-pressure gas storage chamber 3-2 and is used for storing high-pressure gas or low-pressure gas working medium;
the expansion subsystem 5 comprises a turbo expander 5-1 and a generator 5-2, and the turbo expander 5-1 is electrically connected with the generator 5-2 and used for expanding to do work and driving the generator 5-2 to generate electricity.
The outlet of the compression motor 1-1 is connected with the first collection inlet 21 of the cooler 2-1, the first collection outlet 22 of the cooler 2-1 is connected with the first gas storage inlet 31 of the high-pressure gas storage chamber 3-2, the second collection inlet 23 of the cooler 2-1 is connected with the first feedback outlet 41 of the low-temperature heat storage tank 4-1, the second collection outlet 24 of the cooler 2-1 is connected with the first feedback inlet 42 of the heat exchanger 4-2, the second feedback inlet 43 of the heat exchanger 4-2 is connected with the first gas storage outlet 32 of the high-pressure gas storage chamber 3-2, the second feedback outlet 44 of the heat exchanger 4-2 is connected with the inlet of the flat expansion machine 5-1, the outlet of the flat expansion machine 5-1 is connected with the second gas storage inlet 33 of the low-pressure gas storage chamber 3-1, and the second gas storage outlet 34 of the low-pressure gas storage chamber 3-1 is connected with the inlet of the compressor 1-2.
The closed cycle compression energy storage power generation system is characterized in that a cycle working medium is helium-xenon mixed gas with large specific heat and good compressibility; the heat exchange liquid medium is water or oil with good heat conductivity.
The working principle is as follows:
the compression motor 1-1 is electrified to drive the compressor 1-2 to rotate to compress a working medium, the compression process is an approximate adiabatic compression process, a low-temperature low-pressure gas working medium is compressed to become a high-temperature high-pressure gas working medium, the compressed high-temperature high-pressure gas working medium enters the cooler 2-1 to exchange heat with a heat exchange liquid medium and then enters the high-pressure gas storage chamber 3-2, liquid heat energy collected by the heat exchange liquid medium of the cooler 2-1 enters the high-temperature heat storage tank 2-2 to be stored, the low-pressure gas storage chamber 3-1 stores a low-pressure gas working medium which is expanded and does work by the turbine expander 5-1, the high-pressure gas working medium enters the heat exchanger 4-2 to exchange heat with the heat exchange liquid medium of the high-temperature heat storage tank 2-2 to enter the turbine expander 5-1 to do work and drive the generator 5-2 to generate electricity, the work expansion process is an approximate adiabatic expansion process, the high-temperature high-pressure gas working medium is expanded to become a low-temperature low-pressure gas working medium and then enters the low-pressure gas storage chamber 3-1, and the heat energy of the heat exchange liquid medium which is exchanged heat by the heat exchanger 4-2 to enter the low-1 to be stored.
The second embodiment is as follows: the embodiment is described with reference to fig. 2 and fig. 3, and a closed cycle compression energy storage power generation system includes a compression subsystem 1, a compression heat collection subsystem 2, a gas storage subsystem 3, a compression heat feedback subsystem 4, and an expansion subsystem 5;
the compression subsystem 1 comprises a first motor 101, a first compressor 102 and a second compressor 103, wherein the first motor 101, the first compressor 102 and the second compressor 103 are sequentially connected in series;
the compression heat collection subsystem 2 comprises a first cooler 201, a second cooler 202 and a first high temperature thermal storage tank 203;
the gas storage subsystem 3 comprises a low-pressure gas storage chamber 3-1 and a high-pressure gas storage chamber 3-2, an inlet of the low-pressure gas storage chamber 3-1 is connected with an outlet of the high-pressure gas storage chamber 3-2, and the low-pressure gas storage chamber 31 is connected with a vacuum pump 3-3 and an inflation module 3-4.
The compression heat feedback subsystem 4 comprises a first low-temperature heat storage tank 401, a first heat exchanger 402 and a second heat exchanger 403;
the expansion subsystem 5 comprises a first turbine expander 501, a second turbine expander 503 and a first generator 502, wherein the first generator 502, the first turbine expander 501 and the second turbine expander 503 are sequentially connected in series;
the outlet of the first compressor 102 is connected with the first collecting inlet 21 of the first cooler 201, the inlet of the first compressor 102 is connected with the second gas storage outlet 34 of the low-pressure gas storage chamber 31, the outlet of the second compressor 103 is connected with the left inlet of the second cooler 202, and the inlet of the second compressor 103 is connected with the right outlet of the first cooler 201; the first collection outlet 22 of the second cooler 202 is connected with the first gas storage inlet 31 of the high-pressure gas storage chamber 3-2;
the right inlet of the first cooler 201 and the second collecting inlet 23 of the second cooler 202 are both connected to the first feedback outlet 41 of the first low-temperature heat storage tank 401, and the left outlets of the first cooler 201 and the second cooler 202 are both connected to the inlet of the first high-temperature heat storage tank 203.
The left inlets of the first heat exchanger 402 and the second heat exchanger 403 are merged to form a first feedback inlet 42, the first feedback inlet 42 is connected with the second collection outlet 24 of the first high-temperature heat storage tank 203, the second feedback outlet 44 of the first heat exchanger 402 is connected with the inlet of the first turbo expander 501, the right outlets of the first heat exchanger 402 and the second heat exchanger 403 are both connected with the inlet of the first low-temperature heat storage tank 401, the first low-temperature heat storage tank 401 is provided with a first feedback outlet 41, the second feedback inlet 43 of the second heat exchanger 403 is connected with the first gas storage outlet 32 of the high-pressure gas storage chamber 3-2, the outlet of the second turbo expander 503 is connected with the right inlet of the first heat exchanger 402, and the inlet of the second turbo expander 503 is connected with the left outlet of the second heat exchanger 403.
A first self-operated regulating valve 61 and a second stop valve 62 are installed on a connecting pipeline of the first compressor 102 and the second gas storage outlet 34, a first stop valve 63 is installed on a connecting pipeline of the second gas storage inlet 33 and the first turbo expander 501, a seventh stop valve 65 is installed at an inlet of the first high-temperature heat storage tank 203, a second circulating water pump 71 and an eighth stop valve 66 are installed at an outlet of the first high-temperature heat storage tank 203 in sequence, a second self-operated regulating valve 67 is installed at an inlet of the second turbo expander 503, a fifth stop valve 68 is installed at an inlet of the first low-temperature heat storage tank 401, a first circulating water pump 72 and a sixth stop valve 69 are installed at a first feedback outlet 41 of the first low-temperature heat storage tank 401 in sequence, a third stop valve 610 and a fourth stop valve 611 are installed at a first gas storage inlet 31 and a first gas storage outlet 32 of the high-pressure gas storage chamber 3-2 respectively, a first check valve 64 is installed on a connecting pipeline of the second gas storage inlet 33 and the first turbo expander 501, a second check valve 612 is installed at an outlet of the second compressor 103, and backflow of circulating gas working medium is avoided.
The vacuum pump 3-3 is connected with the low-pressure air storage chamber 3-1 through a suction check valve 613 and a suction stop valve 614, the inflation module 3-4 comprises an inflation bottle group 3-41 and a filter 3-42, the inflation bottle group 3-41 is connected with the filter 3-42 through a suction stop valve 615, and the filter 3-42 is connected with the low-pressure air storage chamber 3-1.
The closed cycle compression energy storage power generation system is characterized in that a cycle working medium is helium-xenon mixed gas with large specific heat and good compressibility; the heat exchange liquid medium is water or oil with good heat conductivity.
The third concrete implementation mode: with reference to fig. 2 and fig. 3, the present embodiment is described, and based on the second embodiment, an operation method of a closed cycle compression energy storage power generation system of the present embodiment includes:
step 1, opening an air extraction stop valve 614, starting a vacuum pump 3-3, and closing the vacuum pump 3-3 and the air extraction stop valve 614 after exhausting and cleaning air in a closed circulation loop;
step 2, opening an inflation stop valve 615, injecting a to-be-operated circulating working medium into the low-pressure gas storage chamber 3-1, wherein the circulating working medium is helium-xenon mixed gas, the circulating working medium is filled in a closed circulation loop, and the inflation stop valve 615 is closed after the operating pressure is reached;
step 4, controlling the inlet pressure and temperature of the equipment by the first compressor 102, the second compressor 103, the first turbo expander 501 and the second turbo expander 503;
the sixth cut-off valve 69 and the seventh cut-off valve 65 are opened, and the first circulation pump 72 is started; the first motor 101 is started according to the set operation speed, the first compressor 102 and the second compressor 103 are driven to rotate to compress the circulating working medium, the compressed high-temperature and high-pressure gas circulating working medium enters the high-pressure gas storage chamber 3-2 after heat exchange through the first heat exchanger 402 and the second heat exchanger 403, the heat exchange liquid medium for obtaining heat energy enters the first high-temperature heat storage tank 203, the energy storage process is completed, and the second stop valve 62, the third stop valve 610, the sixth stop valve 69, the seventh stop valve 65 and the first motor 101 are closed;
step 6, during energy release, opening the first stop valve 63 and the fourth stop valve 611, and adjusting the second self-supporting regulating valve 67 to control the inlet temperature and pressure of the first turbo-expander 501 and the second turbo-expander 503;
the fifth and eighth cut-off valves 68 and 66 are opened, and the second circulation pump 71 is started;
the circulating working medium is changed into a high-temperature high-pressure working medium after being subjected to heat exchange by the first heat exchanger 402 and the second heat exchanger 403, and enters the first turbo expander 501 and the second turbo expander 503 to do work to drive the first generator 502 to generate electricity, the heat exchange liquid medium which completes the heat exchange process enters the first low-temperature heat storage tank 401 to be stored, the energy release process is completed, and the first stop valve 63, the fourth stop valve 611, the fifth stop valve 68 and the eighth stop valve 66 are closed.
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 exemplary embodiments according to the present application. 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.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; above" may include both orientations "at 8230; \8230; above" and "at 8230; \8230; below". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
It should be noted that, in the above embodiments, as long as the technical solutions can be aligned and combined without contradiction, those skilled in the art can exhaust all possibilities according to the mathematical knowledge of the alignment and combination, and therefore, the present invention does not describe the technical solutions after alignment and combination one by one, but it should be understood that the technical solutions after alignment and combination have been disclosed by the present invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a closed circulation compression energy storage power generation system which characterized in that: the system comprises a compression subsystem (1), a compression heat collection subsystem (2), a gas storage subsystem (3), a compression heat feedback subsystem (4) and an expansion subsystem (5);
the outlet of the compression subsystem (1) is connected with the first collecting inlet (21) of the compression heat collecting subsystem (2), the first collecting outlet (22) of the compression heat collecting subsystem (2) is connected with the first gas storage inlet (31) of the gas storage subsystem (3), the second collecting inlet (23) of the compression heat collecting subsystem (2) is connected with the first feedback outlet (41) of the compression heat feedback subsystem (4), the second collecting outlet (24) of the compression heat collecting subsystem (2) is connected with the first feedback inlet (42) of the compression heat feedback subsystem (4), the second feedback inlet (43) of the compression heat feedback subsystem (4) is connected with the first gas storage outlet (32) of the gas storage subsystem (3), the second feedback outlet (44) of the compression heat feedback subsystem (4) is connected with the inlet of the expansion subsystem (5), the outlet of the expansion subsystem (5) is connected with the second gas storage inlet (33) of the gas storage subsystem (3), and the second feedback outlet (34) of the gas storage subsystem (3) is connected with the inlet of the compression heat collecting subsystem (3).
2. The closed cycle compression energy storage power generation system of any one of claim 1, wherein: the gas storage subsystem (3) comprises a low-pressure gas storage chamber (3-1) and a high-pressure gas storage chamber (3-2), an inlet of the low-pressure gas storage chamber (3-1) is connected with an outlet of the high-pressure gas storage chamber (3-2), the low-pressure gas storage chamber (3-1) is provided with a second gas storage inlet (33) and a second gas storage outlet (34), the high-pressure gas storage chamber (3-2) is provided with a first gas storage inlet (31) and a first gas storage outlet (32), and the low-pressure gas storage chamber (31) is connected with a vacuum pump (3-3) and an inflation module (3-4).
3. The closed cycle compression energy storage power generation system of claim 2, wherein: the compression subsystem (1) comprises a compression motor (1-1) and a compressor (1-2), and the compression motor (1-1) is electrically connected with the compressor (1-2);
the compression heat collection subsystem (2) comprises a cooler (2-1) and a high-temperature heat storage tank (2-2), an outlet of the cooler (2-1) is connected with an inlet of the high-temperature heat storage tank (2-2), the cooler (2-1) is provided with a first collection inlet (21), a first collection outlet (22) and a second collection inlet (23), and the high-temperature heat storage tank (2-2) is provided with a second collection outlet (24).
4. A closed cycle compression energy storage power generation system according to any one of claim 3 wherein: the compression heat feedback subsystem (4) comprises a low-temperature heat storage tank (4-1) and a heat exchanger (4-2), an inlet of the low-temperature heat storage tank (4-1) is connected with an outlet of the heat exchanger (4-2), the low-temperature heat storage tank (4-1) is provided with a first feedback outlet (41), and the heat exchanger (4-2) is provided with a first feedback inlet (42), a second feedback inlet (43) and a second feedback outlet (44).
5. The closed cycle compression energy storage power generation system of any one of claim 4, wherein: the expansion subsystem (5) comprises a turbine expansion machine (5-1) and a generator (5-2), and the turbine expansion machine (5-1) is electrically connected with the generator (5-2).
6. The closed cycle compression energy storage power generation system of claim 2, wherein: the compression subsystem (1) comprises a first electric motor (101), a first compressor (102) and a second compressor (103);
the compression heat collection subsystem (2) comprises a first cooler (201), a second cooler (202) and a first high-temperature heat storage tank (203);
the first motor (101), the first compressor (102) and the second compressor (103) are sequentially connected in series, the outlet of the first compressor (102) is connected with the first collecting inlet (21) of the first cooler (201), the inlet of the first compressor (102) is connected with the second gas storage outlet (34) of the low-pressure gas storage chamber (31), the outlet of the second compressor (103) is connected with the left inlet of the second cooler (202), and the inlet of the second compressor (103) is connected with the right outlet of the first cooler (201); the first collection outlet (22) of the second cooler (202) is connected with the first gas storage inlet (31) of the high-pressure gas storage chamber (3-2);
the right inlet of the first cooler (201) and the second collecting inlet (23) of the second cooler (202) are both connected with the first feedback outlet (41) of the compression heat feedback subsystem (4), and the left outlets of the first cooler (201) and the second cooler (202) are both connected with the inlet of the first high-temperature heat storage tank (203).
7. The closed cycle compression energy storage power generation system of claim 6, wherein: the compression heat feedback subsystem (4) comprises a first low-temperature heat storage tank (401), a first heat exchanger (402) and a second heat exchanger (403);
the expansion subsystem (5) comprises a first turbine expansion machine (501), a second turbine expansion machine (503) and a first generator (502), wherein the first generator (502), the first turbine expansion machine (501) and the second turbine expansion machine (503) are sequentially connected in series;
left inlets of the first heat exchanger (402) and the second heat exchanger (403) are converged to form a first feedback inlet (42), the first feedback inlet (42) is connected with a second collection outlet (24) of the first high-temperature heat storage tank (203), a second feedback outlet (44) of the first heat exchanger (402) is connected with an inlet of a first turbo expander (501), right outlets of the first heat exchanger (402) and the second heat exchanger (403) are connected with an inlet of the first low-temperature heat storage tank (401), the first low-temperature heat storage tank (401) is provided with a first feedback outlet (41), a second feedback inlet (43) of the second heat exchanger (403) is connected with a first gas storage outlet (32) of the high-pressure gas storage chamber (3-2), an outlet of the second turbo expander (503) is connected with a right inlet of the first heat exchanger (402), and a left outlet of a second heat exchanger (403) of an inlet of the second turbo expander (503) is connected.
8. The closed cycle compression energy storage power generation system of claim 7, wherein: a first self-operated regulating valve (61) and a second stop valve (62) are installed on a connecting pipeline of a first compressor (102) and a second gas storage outlet (34), a first stop valve (63) is installed on a connecting pipeline of a second gas storage inlet (33) and a first turbine expander (501), a seventh stop valve (65) is installed at an inlet of a first high-temperature heat storage tank (203), a second circulating water pump (71) and an eighth stop valve (66) are sequentially installed at an outlet of the first high-temperature heat storage tank (203), a second self-operated regulating valve (67) is installed at an inlet of a second turbine expander (503), a fifth stop valve (68) is installed at an inlet of a first low-temperature heat storage tank (401), a first circulating water pump (72) and a sixth stop valve (69) are sequentially installed at a first feedback outlet (41) of the first low-temperature heat storage tank (401), a third stop valve (610) and a fourth stop valve (69) are installed at a first gas storage inlet (31) and a first gas storage outlet (32) of a high-pressure gas storage chamber (3-2), a third stop valve (610) and a fourth stop valve (103) are respectively installed at an outlet (611), and a connecting pipeline of a second gas storage compressor (103) and a second check valve (501), and a connecting pipeline of a second gas storage inlet (612) is installed at an outlet (103).
9. The closed cycle compression energy storage power generation system of claim 8, wherein: the vacuum pump (3-3) is connected with the low-pressure air storage chamber (3-1) through an air exhaust check valve (613) and an air exhaust stop valve (614), the air inflation module (3-4) comprises an air inflation bottle group (3-41) and a filter (3-42), the air inflation bottle group (3-41) is connected with the filter (3-42) through the air inflation stop valve (615), and the filter (3-42) is connected with the low-pressure air storage chamber (3-1).
10. An operation method of a closed-cycle compression energy-storage power generation system is realized based on the closed-cycle compression energy-storage power generation system of claim 9, and is characterized by comprising the following steps:
step 1, opening an air extraction stop valve (614), starting a vacuum pump (3-3), and closing the vacuum pump (3-3) and the air extraction stop valve (614) after exhausting and cleaning air in a closed circulation loop;
step 2, opening an inflation stop valve (615), injecting a to-be-operated circulating working medium into the low-pressure gas storage chamber (3-1), wherein the circulating working medium is a helium-xenon mixed gas, the circulating working medium is filled in a closed circulation loop, and the inflation stop valve (615) is closed after the operating pressure is reached;
step 3, the low-pressure gas storage chamber (3-1) stores a circulating gas working medium, the first low-temperature heat storage tank (401) stores low-temperature liquid heat energy, and the first high-temperature heat storage tank (203) stores high-temperature liquid heat energy;
step 4, controlling the inlet pressure and temperature of the equipment by the first compressor (102), the second compressor (103), the first turboexpander (501) and the second turboexpander (503);
step 5, during energy storage, opening a second stop valve (62) and a third stop valve (610), and adjusting a first self-supporting regulating valve (61) to control the inlet pressure and temperature of the first compressor (102);
opening the sixth stop valve (69) and the seventh stop valve (65), and starting the first circulating pump (72); the method comprises the steps that a first motor (101) is started according to a set operation rotating speed, a first compressor (102) and a second compressor (103) are driven to rotate to compress a circulating working medium, the compressed high-temperature and high-pressure gas circulating working medium enters a high-pressure gas storage chamber (3-2) after heat exchange is carried out on the high-temperature and high-pressure gas circulating working medium through a first heat exchanger (402) and a second heat exchanger (403), a heat exchange liquid medium for obtaining heat energy enters a first high-temperature heat storage tank (203), the energy storage process is completed, and a second stop valve (62), a third stop valve (610), a sixth stop valve (69), a seventh stop valve (65) and the first motor (101) are closed;
step 6, during energy release, opening a first stop valve (63) and a fourth stop valve (611), and adjusting a second self-supporting adjusting valve (67) to control the inlet temperature and pressure of a first turbine expansion machine (501) and a second turbine expansion machine (503);
opening a fifth stop valve (68) and an eighth stop valve (66) and starting a second circulating pump (71);
the circulating working medium is changed into a high-temperature high-pressure working medium after heat exchange through the first heat exchanger (402) and the second heat exchanger (403), the high-temperature high-pressure working medium enters the first turbo expander (501) and the second turbo expander (503) to do work to drive the first generator (502) to generate electricity, a heat exchange liquid medium which finishes the heat exchange process enters the first low-temperature heat storage tank (401) to be stored, the energy release process is finished, and the first stop valve (63), the fourth stop valve (611), the fifth stop valve (68) and the eighth stop valve (66) are closed.
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| CN202211018186.4A CN115234329A (en) | 2022-08-24 | 2022-08-24 | Closed-cycle compression energy storage power generation system and operation method thereof |
| PCT/CN2022/120401 WO2024040666A1 (en) | 2022-08-24 | 2022-09-22 | Closed-cycle compression energy storage power generation system and operation method thereof |
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| CN202211018186.4A CN115234329A (en) | 2022-08-24 | 2022-08-24 | Closed-cycle compression energy storage power generation system and operation method thereof |
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