CN109356805A - A kind of CO with high-temperature phase-change energy storage2Solar-thermal generating system and its control method - Google Patents
A kind of CO with high-temperature phase-change energy storage2Solar-thermal generating system and its control method Download PDFInfo
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- CN109356805A CN109356805A CN201811329189.3A CN201811329189A CN109356805A CN 109356805 A CN109356805 A CN 109356805A CN 201811329189 A CN201811329189 A CN 201811329189A CN 109356805 A CN109356805 A CN 109356805A
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- 238000000034 method Methods 0.000 title claims description 8
- 230000008859 change Effects 0.000 claims abstract description 37
- 238000004146 energy storage Methods 0.000 claims abstract description 18
- 238000010248 power generation Methods 0.000 claims description 37
- 238000009825 accumulation Methods 0.000 claims description 15
- 230000000087 stabilizing effect Effects 0.000 claims description 12
- 150000003839 salts Chemical class 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 abstract 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 17
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 238000005338 heat storage Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- GCNLQHANGFOQKY-UHFFFAOYSA-N [C+4].[O-2].[O-2].[Ti+4] Chemical compound [C+4].[O-2].[O-2].[Ti+4] GCNLQHANGFOQKY-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
- F03G6/02—Devices for producing mechanical power from solar energy using a single state working fluid
- F03G6/04—Devices for producing mechanical power from solar energy using a single state working fluid gaseous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/103—Carbon dioxide
-
- 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
- F01K7/32—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 using steam of critical or overcritical pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
- F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
A kind of CO with high-temperature phase-change energy storage proposed by the present invention2Solar-thermal generating system, comprising: solar-thermal generating system, photo-thermal hold over system, photo-thermal heat accumulating power generating system；Solar-thermal generating system includes that the first CO constituted is sequentially connected by heat dump, turbo-expander, air cooler, stage compressor and split-compressor2Circulation loop；Photo-thermal hold over system includes that the 2nd CO constituted is sequentially connected by heat dump, phase change heat accumulator and booster pump2Circulation loop；Photo-thermal heat accumulating power generating system includes that the 3rd CO constituted is sequentially connected by phase change heat accumulator, turbo-expander, air cooler, stage compressor and split-compressor2Circulation loop.CO in the present invention2It is both heat-absorbing medium and turbine acting medium, without traditional scale buildup clogs pipeline or refrigerant leakage pollution problem, having reduces energy consumption, makes system long-time steady operation, the effect that raw material is easy to get.Cycle efficieny of the present invention is high, and stability is high, and construction cost is low, and construction period is short, use easy to spread.
Description
Technical field
The present invention relates to photo-thermal power generation technical field more particularly to a kind of CO with high-temperature phase-change energy storage2Photo-thermal power generation system
System and its control method.
Background technique
China's photo-thermal power generation using conduction oil or melts salt as heat absorption, storage hot medium, using vapor as heat at present
The working medium of work conversion.
It is absorbed heat using conduction oil, heat-storage medium, utilizes temperature no more than the highest of oil product with system temperature, generally
At 300 DEG C~400 DEG C or so, thus by restricting except temperature, cause the generating efficiency of system relatively low；Meanwhile conduction oil is flammable liquid
Body, there are fire and the security risks of explosion.
Using melt salt absorb heat, heat-storage medium, need to consider to melt the burn into Anti-solidification measure of salt, need to establish large capacity
Melt salt storage tank, process needs to consume additional energy for melting heating, the conveying of salt, this mode invests big, system complex, auxiliary
Electromechanics consumption height, poor reliability etc..
It is generated electricity, is restricted by Rankine cycle, generating efficiency is relatively low using vapor driving steam turbine.
Summary of the invention
The present invention is exactly in view of the deficienciess of the prior art, provide a kind of CO with high-temperature phase-change energy storage2Photo-thermal hair
Electric system and its control method.
To solve the above problems, the technical solution used in the present invention is as follows:
A kind of CO with high-temperature phase-change energy storage2Solar-thermal generating system, comprising: solar-thermal generating system, photo-thermal hold over system, photo-thermal store
Heat generating system；The solar-thermal generating system includes the heat dump by being mounted on condenser, the turbine in turbine power generation unit
Expanding machine, air cooler, stage compressor and split-compressor are sequentially connected the first CO of composition2Circulation loop；The photo-thermal stores
Hot systems include being sequentially connected the 2nd CO constituted by the heat dump, phase change heat accumulator and booster pump being mounted on condenser2It follows
Loop back path；The photo-thermal heat accumulating power generating system includes by the turbo-expander, air-cooled in phase change heat accumulator, turbine power generation unit
Device, stage compressor and split-compressor are sequentially connected the 3rd CO of composition2Circulation loop.
Preferably, the heat dump is connected to by the first access with the phase change heat accumulator, also passes through alternate path and institute
State turbo-expander connection, the first switching valve be used for switch the first access be connected to alternate path corresponding to phase change heat accumulator with
Turbo-expander.
Preferably, the heat dump is connected to by third path with the phase change heat accumulator, also passes through fourth passage and institute
Split-compressor connection is stated, the second switching valve is used to switch the third path and is connected to corresponding phase-transition heat-storage with fourth passage
Device and turbo-expander.
Preferably, which further includes the first pressure stabilizing branch, and one end of the first pressure stabilizing branch and the heat dump connect
Logical, the other end is connected to voltage-stablizer.
Preferably, which further includes the second pressure stabilizing branch, and one end of the second pressure stabilizing branch is connected to air accumulator, separately
One end is connected to stage compressor and heat dump respectively by two bypass lines.
Preferably, the heat dump cooperates tower condenser system using the poly- formula heat dump of point.
Preferably, the heat dump uses the poly- formula heat dump of line, cooperates slot type, linear Fresnel formula condenser system.
Preferably, inter cooler is equipped between two-stage compressor, the cold CO exported by air cooler2It is come out with by stage compressor
Hot CO2Heat exchange is carried out in the inter cooler.
Preferably, the turbo-expander, air cooler and inter cooler, which are sequentially communicated, constitutes CO2Heat-exchanging loop.
The invention also provides a kind of CO with high-temperature phase-change energy storage2The control method of electricity generation system, including photo-thermal power generation
Mode, photo-thermal accumulation of heat mode, accumulation of heat power generation mode；
Under photo-thermal power generation mode, phase change heat accumulator and booster pump are cut out into stoppage in transit, solar heat is gathered suction by condenser
Hot device, CO2After being heated to predetermined temperature in heat dump, into the turbo-expander in turbine power generation unit in expanded
Acting, and electric energy is externally exported, the CO after expansion2By cooling in air cooler, stage compressor, split-compressor are being passed sequentially through
After be pressurized to supercritical pressure, be then again introduced into heat dump；
Under photo-thermal accumulation of heat mode, by turbo-expander, air cooler, stage compressor, the two-stage compression in turbine power generation unit
Machine-cut goes out to stop transport, and solar heat is gathered heat dump, CO by condenser2After being heated to predetermined temperature in heat dump, into
Enter phase change heat accumulator, the solid salt that melts in phase change heat accumulator is heated to molten state, after being pressurizeed by booster pump 12 again
Into heat dump；
Under accumulation of heat power generation mode, condenser and heat dump are cut out into stoppage in transit, CO2Predetermined temperature is heated in phase change heat accumulator
Degree, into the turbo-expander in turbine power generation unit in carry out expansion work, and externally export electric energy, the CO after expansion2By
It is cooling in air cooler, it is pressurized to supercritical pressure after passing sequentially through stage compressor, split-compressor, is then again introduced into
Phase change heat accumulator.
Compared with prior art, implementation result of the invention is as follows by the present invention:
(1) CO in the present invention2It is both heat-absorbing medium and turbine acting medium, without traditional scale buildup clogs pipeline or work
Matter leakage pollution problem.
(2) CO2Critical-temperature is suitable for, and close to room temperature, helps to reduce energy consumption.
(3) CO2Density is larger in operating condition, without phase-change, can make system long-time steady operation.
(4) CO2Storage is huge, and raw material is easy to get.
(5) cycle efficieny of the present invention is high, under the conditions of fluid properties 28MPa, 620 DEG C, supercritical CO2Brayton cycle
Generating efficiency can achieve 50% or more, suitable with 700 DEG C of steam units, and generating efficiency is high.
(6) construction cost of the present invention is low, and construction period is short, use easy to spread.
(7) photo-thermal power generation mode and accumulation of heat power generation mode are combined together by the present invention, expand the capacity of system, system
The stability of operation is high.
Detailed description of the invention
Fig. 1 is a kind of CO with high-temperature phase-change energy storage proposed by the present invention2The structural schematic diagram of solar-thermal generating system.
In figure: 1, condenser；2, heat dump；3, the first switching valve；4, phase change heat accumulator；5, turbine power generation unit；6, empty
Cooler；7, air accumulator；8, stage compressor；9, inter cooler；10, split-compressor；11, the second switching valve；12, booster pump；13,
Voltage-stablizer.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Describe to whole property.Certainly, described embodiment is a part of the embodiment of the present invention, instead of all the embodiments.
In conjunction with Fig. 1, a kind of CO with high-temperature phase-change energy storage proposed by the present invention2Solar-thermal generating system, comprising: photo-thermal power generation
System, photo-thermal hold over system, photo-thermal heat accumulating power generating system.
The solar-thermal generating system includes the heat dump 2 by being mounted on condenser 1, the turbine in turbine power generation unit 5
Expanding machine, air cooler 6, stage compressor 8 and split-compressor 10 are sequentially connected the first CO of composition2Circulation loop.
The photo-thermal hold over system includes the heat dump 2, phase change heat accumulator 4 and booster pump 12 by being mounted on condenser 1
It is sequentially connected the 2nd CO of composition2Circulation loop.
The photo-thermal heat accumulating power generating system includes by turbo-expander, the sky in phase change heat accumulator 4, turbine power generation unit 5
Cooler 6, stage compressor 8 and split-compressor 10 are sequentially connected the 3rd CO of composition2Circulation loop.
There are three types of operating modes for present invention tool: photo-thermal power generation mode, photo-thermal accumulation of heat mode, accumulation of heat power generation mode.
Under photo-thermal power generation mode, phase change heat accumulator 4 and booster pump 12 are cut out into stoppage in transit, condenser 1 is by solar heat
Gather heat dump 2, CO2Turbine expansion after being heated to predetermined temperature in heat dump 2, into turbine power generation unit 5
Expansion work is carried out in machine, and externally exports electric energy, the CO after expansion2By cooling in air cooler 6, one stage of compression is being passed sequentially through
It is pressurized to supercritical pressure after machine 8, split-compressor 10, is then again introduced into heat dump 2, to realize overcritical titanium dioxide
Carbon Brayton cycle realizes transformation of the thermal energy to electric energy.
Under photo-thermal accumulation of heat mode, by turbo-expander, air cooler 6, the stage compressor 8, two in turbine power generation unit 5
Grade compressor 10 cuts out stoppage in transit, and solar heat is gathered heat dump 2, CO by condenser 12It is heated in heat dump 2 pre-
After determining temperature, into phase change heat accumulator 4, the solid salt that melts in phase change heat accumulator 4 is heated to molten state, is passing through booster pump
Heat dump 2 is again introduced into after 12 pressurizations；To realize CO2Circular flow.
Under accumulation of heat power generation mode, condenser 1 and heat dump 2 are cut out into stoppage in transit, CO2It is heated in phase change heat accumulator 4
To predetermined temperature, into the turbo-expander in turbine power generation unit 5 in carry out expansion work, and externally export electric energy, expand
CO afterwards2By cooling in air cooler 6, overcritical pressure is pressurized to after passing sequentially through stage compressor 8, split-compressor 10
Then power is again introduced into phase change heat accumulator 4, to realize supercritical carbon dioxide Brayton cycle, realize thermal energy to electric energy
Transformation.
The heat dump 2 is connected to by the first access with the phase change heat accumulator, and alternate path and the turbine are also passed through
Expanding machine connection, the first switching valve 3 are used to switch the first access and are connected to corresponding phase change heat accumulator and turbine with alternate path
Expanding machine.The heat dump 2 is connected to by third path with the phase change heat accumulator, and fourth passage and the second level pressure are also passed through
Contracting machine 10 is connected to, the second switching valve 11 be used to switch the third path be connected to fourth passage corresponding phase change heat accumulator with
Turbo-expander, first switching valve 3 and the second switching valve 11 are three-dimensional switching valve.
By the first switching valve 3 of setting and the convenient control to the system operating mode of the second switching valve 11, in photo-thermal
Under power generation mode, need that phase change heat accumulator 4 and booster pump 12 are cut out stoppage in transit by the first switching valve 3 and the second switching valve 11.
Under photo-thermal accumulation of heat mode, need through the first switching valve 3 and the second switching valve 11, by turbine power generation unit 5, air cooler 6, one
Grade compressor 8 and split-compressor 10 cut out stoppage in transit.Under accumulation of heat power generation mode, need to cut by the first switching valve 3 and second
Valve 11 is changed, condenser 1 and heat dump 2 are cut out into stoppage in transit.
Phase change heat accumulator 4 is the core apparatus of this system, utilizes material phase transformation latent heat, the big, volume with energy storage density
Small advantage.Phase change heat accumulator 4 in the present invention uses tube shell type structure: shell-side filled solid melts salt；Pipe side is CO2Runner.
Melt salt and selects the complex salt with high phase transition temperature, the CO that phase point temperature and heat dump 2 export2Temperature Matching.
This system further includes the first pressure stabilizing branch, and one end of the first pressure stabilizing branch is connected to the heat dump 2, another
End is connected to voltage-stablizer 13.It can be to three CO by voltage-stablizer 132CO in circulation loop2Play pressure stabilization function.
This system further includes the second pressure stabilizing branch, and one end of the second pressure stabilizing branch is connected to air accumulator 7, and the other end is logical
Two bypass lines are crossed to be connected to stage compressor 8 and heat dump 2 respectively.
As pipeline leakage CO2It excessively, need to be upward by air accumulator 7 in time when voltage-stablizer 13 being caused not have desired effect
It states and continues to supplement CO in circulation loop2。
Core of the invention device further includes heat dump 2, and the heat-absorbing medium inside heat dump 2 is CO2。
A little poly- formula heat dump 2 can be used in heat dump 2 of the invention, cooperates tower condenser system；Or it is inhaled using the poly- formula of line
Hot device 2 cooperates slot type, linear Fresnel formula condenser system.
Inter cooler 9, the cold CO exported by air cooler 6 are equipped between two-stage compressor2With the heat come out by stage compressor 8
CO2Heat exchange is carried out in the inter cooler 9, to improve the compression efficiency of compressor.
Turbo-expander, air cooler 6 and inter cooler 9 in the present invention, which are sequentially communicated, constitutes CO2Heat-exchanging loop, with level-one
The hot CO that compressor 8 comes out2Cold CO after exchanging heat2It can flow back into turbo-expander again, to realize to system energy
The recycling of amount improves the utilization rate of system capacity.
It should be noted that being equipped with control valve on previously described all pipelines.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of CO with high-temperature phase-change energy storage2Solar-thermal generating system characterized by comprising solar-thermal generating system, photo-thermal store
Hot systems, photo-thermal heat accumulating power generating system；The solar-thermal generating system includes heat dump, the turbine power generation by being mounted on condenser
Turbo-expander, air cooler, stage compressor and split-compressor in unit are sequentially connected the first CO of composition2It is recycled back to
Road；The photo-thermal hold over system includes being sequentially connected structure by the heat dump, phase change heat accumulator and booster pump being mounted on condenser
At the 2nd CO2Circulation loop；The photo-thermal heat accumulating power generating system includes by the turbine in phase change heat accumulator, turbine power generation unit
Expanding machine, air cooler, stage compressor and split-compressor are sequentially connected the 3rd CO of composition2Circulation loop.
2. a kind of CO with high-temperature phase-change energy storage according to claim 12Solar-thermal generating system, which is characterized in that the suction
Hot device is connected to by the first access with the phase change heat accumulator, is also connected to by alternate path with the turbo-expander, first
Switching valve is used to switch the first access and is connected to corresponding phase change heat accumulator and turbo-expander with alternate path.
3. a kind of photo-thermal CO with high-temperature phase-change energy storage according to claim 1 or 22Electricity generation system, which is characterized in that institute
It states heat dump to be connected to by third path with the phase change heat accumulator, be also connected to by fourth passage with the split-compressor,
Second switching valve is used to switch the third path and is connected to corresponding phase change heat accumulator and turbo-expander with fourth passage.
4. a kind of CO with high-temperature phase-change energy storage according to claim 12Solar-thermal generating system, which is characterized in that the system
It further include the first pressure stabilizing branch, one end of the first pressure stabilizing branch is connected to the heat dump, and the other end is connected to voltage-stablizer.
5. a kind of CO with high-temperature phase-change energy storage according to claim 42Solar-thermal generating system, which is characterized in that the system
It further include the second pressure stabilizing branch, one end of the second pressure stabilizing branch is connected to air accumulator, and the other end passes through two bypass lines
It is connected to respectively with stage compressor and heat dump.
6. a kind of CO with high-temperature phase-change energy storage according to claim 12Solar-thermal generating system, which is characterized in that the suction
Hot device cooperates tower condenser system using the poly- formula heat dump of point.
7. a kind of CO with high-temperature phase-change energy storage according to claim 12Solar-thermal generating system, which is characterized in that the suction
Hot device uses the poly- formula heat dump of line, cooperates slot type, linear Fresnel formula condenser system.
8. a kind of photo-thermal CO with high-temperature phase-change energy storage according to claim 12Electricity generation system, which is characterized in that two-stage pressure
Inter cooler is equipped between contracting machine, the cold CO exported by air cooler2With the hot CO come out by stage compressor2In the inter cooler
Carry out heat exchange.
9. a kind of photo-thermal CO with high-temperature phase-change energy storage according to claim 82Electricity generation system, which is characterized in that described
Flat expanding machine, air cooler and inter cooler, which are sequentially communicated, constitutes CO2Heat-exchanging loop.
10. a kind of CO with high-temperature phase-change energy storage2The control method of electricity generation system, which is characterized in that including photo-thermal power generation mode,
Photo-thermal accumulation of heat mode, accumulation of heat power generation mode；
Under photo-thermal power generation mode, phase change heat accumulator and booster pump are cut out into stoppage in transit, solar heat is gathered suction by condenser
Hot device, CO2After being heated to predetermined temperature in heat dump, into the turbo-expander in turbine power generation unit in expanded
Acting, and electric energy is externally exported, the CO after expansion2By cooling in air cooler, stage compressor, split-compressor are being passed sequentially through
After be pressurized to supercritical pressure, be then again introduced into heat dump；
Under photo-thermal accumulation of heat mode, by turbo-expander, air cooler, stage compressor, the two-stage compression in turbine power generation unit
Machine-cut goes out to stop transport, and solar heat is gathered heat dump, CO by condenser2After being heated to predetermined temperature in heat dump, into
Enter phase change heat accumulator, the solid salt that melts in phase change heat accumulator is heated to molten state, after being pressurizeed by booster pump 12 again
Into heat dump；
Under accumulation of heat power generation mode, condenser and heat dump are cut out into stoppage in transit, CO2Predetermined temperature is heated in phase change heat accumulator
Degree, into the turbo-expander in turbine power generation unit in carry out expansion work, and externally export electric energy, the CO after expansion2By
It is cooling in air cooler, it is pressurized to supercritical pressure after passing sequentially through stage compressor, split-compressor, is then again introduced into
Regenerative apparatus.
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| CN201811329189.3A CN109356805A (en) | 2018-11-09 | 2018-11-09 | A kind of CO with high-temperature phase-change energy storage2Solar-thermal generating system and its control method |
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| CN201811329189.3A CN109356805A (en) | 2018-11-09 | 2018-11-09 | A kind of CO with high-temperature phase-change energy storage2Solar-thermal generating system and its control method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242522A (en) * | 2019-04-12 | 2019-09-17 | 西安热工研究院有限公司 | A solar thermal power generation system and method based on thermochemical energy storage |
| CN110630457A (en) * | 2019-10-18 | 2019-12-31 | 常波 | A photothermal low-temperature power generation system and its control method |
| CN114320828A (en) * | 2021-12-13 | 2022-04-12 | 中国能源建设集团江苏省电力设计院有限公司 | Heat accumulating type compressed air energy storage system and control method |
| CN114526134A (en) * | 2022-01-28 | 2022-05-24 | 中国能源建设集团江苏省电力设计院有限公司 | Phase modulator system based on compressed air energy storage power generation system and operation method thereof |
| CN114542220A (en) * | 2021-12-22 | 2022-05-27 | 中国能源建设集团江苏省电力设计院有限公司 | Phase modulator based on compressed air energy storage power generation system and operation method thereof |
| CN115263696A (en) * | 2022-08-10 | 2022-11-01 | 青岛科技大学 | Solar power generation system coupled with compressed carbon dioxide energy storage |
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