CN113153675A - Power generation system - Google Patents
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- CN113153675A CN113153675A CN202010074559.4A CN202010074559A CN113153675A CN 113153675 A CN113153675 A CN 113153675A CN 202010074559 A CN202010074559 A CN 202010074559A CN 113153675 A CN113153675 A CN 113153675A
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- 238000010248 power generation Methods 0.000 title claims abstract description 84
- 238000004146 energy storage Methods 0.000 claims abstract description 95
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000001257 hydrogen Substances 0.000 claims abstract description 70
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 70
- 150000003839 salts Chemical class 0.000 claims description 34
- 239000000446 fuel Substances 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000007654 immersion Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 7
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 150000004678 hydrides Chemical class 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 4
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 4
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 3
- 239000011232 storage material Substances 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Images
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
- F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
-
- 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
- F01K13/006—Auxiliaries or details not otherwise provided for
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0606—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants
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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
- 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
-
- 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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Combustion & Propulsion (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention provides a power generation system comprising: the solar thermal power generation subsystem comprises a tower type solar thermal collector, a heat exchanger, an energy storage device and a conventional island, wherein the tower type solar thermal collector, the heat exchanger and the energy storage device are connected through pipelines to form a first loop, and the conventional island and the heat exchanger are connected through pipelines to form a second loop; the energy storage device is used for storing heat energy, and the first loop and the second loop exchange heat through the heat exchanger; and the hydrogen energy power generation subsystem is connected with the energy storage device and converts the heat energy stored in the energy storage device into electric energy. The embodiment of the invention effectively solves the problem of unstable power supply of the solar thermal power generation system.
Description
Technical Field
The invention relates to the technical field of power generation, in particular to a power generation system.
Background
With the exhaustion of fossil energy, the energy problem is more and more prominent, the search for new energy with cleaner energy regeneration becomes an urgent subject facing human beings at present, and solar energy resources are inexhaustible and inexhaustible, are clean and renewable ideal energy, and play an important role in the future social energy strategy. Therefore, solar power generation technology has received increasing attention.
The development of solar power generation technology is mature day by day, and two main forms of solar light power generation and solar heat power generation are derived. The solar thermal power generation utilizes solar direct radiation energy, adopts a light-heat-electricity form, obtains heat energy by gathering solar direct radiation, and converts the heat energy into high-temperature high-pressure steam to drive a turbine set to generate power. The forms mainly comprise a groove type, a tower type, a disc type, a Fresnel type and the like, the thermal efficiency is high at high temperature, and meanwhile, the energy storage is convenient to adopt a cheap heat storage technology.
However, the conventional solar thermal power generation system seriously affects the power generation amount due to weather factors such as day and night alternation, and cannot generate power or has small power generation amount when no solar light is emitted or the light intensity is low, so that the normal power supply of the solar power generation system to the electric equipment is affected. Therefore, the problem that the power supply of the existing solar power generation system is unstable is solved.
Disclosure of Invention
The embodiment of the invention provides a power generation system, which aims to solve the problem that the existing solar power generation system is unstable in power supply.
An embodiment of the present invention provides a power generation system, including: the solar thermal power generation subsystem comprises a tower type solar thermal collector, a heat exchanger, an energy storage device and a conventional island, wherein the tower type solar thermal collector, the heat exchanger and the energy storage device are connected through pipelines to form a first loop, and the conventional island and the heat exchanger are connected through pipelines to form a second loop; the energy storage device is used for storing heat energy, and the first loop and the second loop exchange heat through the heat exchanger;
and the hydrogen energy power generation subsystem is connected with the energy storage device and converts the heat energy stored in the energy storage device into electric energy.
Optionally, the energy storage device includes a first energy storage device and a second energy storage device, an inlet end of the first energy storage device is connected to an outlet end of the tower-type solar thermal collector through a first switch valve, and an outlet end of the first energy storage device is connected to a first inlet end of the heat exchanger through a second switch valve; the inlet end of the second energy storage device is connected with the first outlet end of the heat exchanger, and the outlet end of the second energy storage device is connected with the inlet end of the tower type solar heat collector through a third switch valve.
Optionally, a communication pipeline is arranged between the first energy storage device and the second energy storage device, the first energy storage device is connected with one end of the communication pipeline through a fourth switch valve, and the second energy storage device is connected with the other end of the communication pipeline through a fifth switch valve.
Optionally, the hydrogen energy power generation subsystem includes a hydrogen storage device and a hydrogen fuel cell power generation device, an inlet end of the hydrogen storage device is connected to the communication pipeline through a first valve, and a first outlet end of the hydrogen storage device is connected to an inlet end of the second energy storage device through a second valve; and the second outlet end of the hydrogen storage device is connected with the inlet end of the hydrogen fuel cell power generation device through a third valve.
Optionally, the first valve, the second valve and the third valve are flow regulating valves.
Optionally, in the second loop, the conventional island includes a steam turbine, a generator and a steam condenser, a second outlet end of the heat exchanger is connected to the steam turbine, the steam turbine is connected to the generator, and a second inlet end of the heat exchanger is connected to an outlet end of the steam condenser.
Optionally, the heat exchange energy storage medium in the first loop is molten salt.
Optionally, the heat exchanger is a salt-water heat exchanger.
Optionally, an immersion electric heater is disposed in each of the first energy storage device and the second energy storage device.
Optionally, an electric tracing assembly is arranged on a pipeline connecting the energy storage device and the heat exchanger, and an electric tracing assembly is arranged on a pipeline connecting the energy storage device and the hydrogen power generation subsystem.
According to the embodiment of the invention, the solar thermal power generation system and the hydrogen energy power generation system are combined, part of heat energy in the operation process of the solar thermal power generation system is stored in the energy storage device, and when the generated energy of the solar thermal power generation system is insufficient, the heat energy stored in the energy storage device can be released into the hydrogen energy power generation subsystem, so that the hydrogen energy is utilized to realize the power generation of the hydrogen fuel cell, and the problem of unstable power supply of the solar thermal power generation system is further effectively solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a power generation system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
Referring to fig. 1, an embodiment of the present invention provides a power generation system, including:
the solar thermal power generation subsystem 10 comprises a tower type solar thermal collector 11, a heat exchanger 12, an energy storage device 13 and a conventional island 14, wherein the tower type solar thermal collector 11, the heat exchanger 12 and the energy storage device 13 are connected through a pipeline to form a first loop, and the conventional island 14 and the heat exchanger 12 are connected through a pipeline to form a second loop; the energy storage device 13 is used for storing heat energy, and the first loop and the second loop exchange heat through the heat exchanger 12;
and the hydrogen energy power generation subsystem 20 is connected with the energy storage device 13, and converts the heat energy stored in the energy storage device 13 into electric energy.
The tower solar thermal collector 11 may specifically include a heliostat, a heat absorption tower, and a heat absorber, and is configured to convert light energy into heat energy. The size and shape of the heliostat can be set according to actual needs, and is not further limited herein.
The structure of the heat absorption tower can be set according to actual needs, and in one embodiment, the heat absorption tower can be a steel structure; in another embodiment, the absorber tower may also be a concrete structure.
Further, the heat exchange energy storage medium that absorbs heat in the tower solar collector 11, is stored in the energy storage device 13, and is circulated and transported in the first loop may be molten salt. The molten salt can be stored in the energy storage device 13 after absorbing heat by the tower-type solar heat collector 11, and can exchange heat with the second loop through the heat exchanger 12.
It can be understood that when the amount of power generated by the solar thermal power generation subsystem 10 is insufficient, the molten salt in the heat storage device may enter the hydrogen power generation subsystem 20 for heat exchange, desorption of hydrogen is achieved by using heat energy, and finally, the desorbed hydrogen converts chemical energy into electric energy through a hydrogen fuel cell and outputs the electric energy. The part of electric quantity can be used as station service electric quantity and also can be used as internet electric quantity.
The solar thermal power generation subsystem 10 and the hydrogen power generation subsystem 20 may be operated in a combined manner or in a decoupled manner. The solar thermal power generation subsystem 10 can independently generate power by utilizing high-temperature steam through heat exchange of the first loop and the second loop; when the solar thermal power generation subsystem 10 fails, the hydrogen power generation subsystem 20 may provide heat from an electric boiler or other devices, so as to desorb hydrogen gas and generate electricity using a hydrogen fuel cell.
According to the embodiment of the invention, the solar thermal power generation system and the hydrogen energy power generation system are combined, part of heat energy in the operation process of the solar thermal power generation system is stored in the energy storage device 13, and when the generated energy of the solar thermal power generation system cannot meet the requirement of power consumption, the heat energy stored in the energy storage device 13 can be released into the hydrogen energy power generation subsystem 20, so that the hydrogen energy is utilized to realize the power generation of the hydrogen fuel cell, and the problem of unstable power supply of the solar thermal power generation system is effectively solved. Meanwhile, the hydrogen in the hydrogen power generation subsystem 20 is desorbed by the heat energy generated by the solar thermal power generation system, and the hydrogen fuel cell is used for generating power, so that the requirement of the current power generation system on clean energy can be met.
Further, the energy storage device 13 may include a first energy storage device 131 and a second energy storage device 132, an inlet end of the first energy storage device 131 is connected to an outlet end of the tower solar collector 11 through a first switch valve 31, and an outlet end of the first energy storage device 131 is connected to a first inlet end of the heat exchanger 12 through a second switch valve 32; an inlet end of the second energy storage device 132 is connected to a first outlet end of the heat exchanger 12, and an outlet end of the second energy storage device 132 is connected to an inlet end of the tower solar collector 11 through a third on/off valve 33.
In the operation process of the power generation system, the molten salt absorbed by the tower solar collector 11 can be transferred to the first energy storage device 131 through a pipeline, so that the storage of heat energy is realized. And then, according to the actually required power consumption, part or all of the molten salt in the first energy storage device 131 is conveyed to the heat exchanger 12 through a pipeline, and exchanges heat with the working medium water in the second loop, so that the heat of the molten salt is transferred to the working medium water. The fused salt after heat exchange is conveyed to the second energy storage device 132 through a pipeline, and part or all of the fused salt in the second energy storage device 132 is conveyed to the tower type solar heat collector 11 again to absorb heat according to actual needs.
Further, a communication pipe is provided between the first energy storage device 131 and the second energy storage device 132, the first energy storage device 131 is connected to one end of the communication pipe through a fourth switching valve 34, and the second energy storage device 132 is connected to the other end of the communication pipe through a fifth switching valve 35.
The hydrogen energy power generation subsystem 20 may include a hydrogen storage device 21 and a hydrogen fuel cell power generation device 22, wherein an inlet of the hydrogen storage device 21 is connected to the communication pipeline through a first valve 41, and a first outlet of the hydrogen storage device 21 is connected to an inlet of the second energy storage device 132 through a second valve 42; the second outlet of the hydrogen storage device 21 is connected to the inlet of the hydrogen fuel cell power generation device 22 through a third valve 43.
In the operation process of the power generation system, the molten salt in the first energy storage device 131 and the molten salt in the second energy storage device 132 may enter the hydrogen storage device 21 after being mixed through a communication pipeline, the mixed molten salt heats the solid hydride in the hydrogen storage device 21, so that hydrogen is desorbed, and the desorbed hydrogen is transported to the hydrogen fuel cell power generation device 22 through a pipeline, thereby realizing hydrogen fuel cell power generation.
Since the temperature of the molten salt stored in the first energy storage device 131 is higher than that of the molten salt stored in the second energy storage device 132, the temperature of the molten salt entering the hydrogen storage device 21 can be controlled by adjusting the output of the two energy storage devices 13, so as to ensure that the solid hydride is at a suitable hydrogen evolution temperature.
Specifically, in order to control the flow rate of the molten salt and the hydrogen gas, the first valve 41, the second valve 42, and the third valve 43 may be flow rate adjustment valves.
The hydrogen storage device 21 may be filled with hydrogen storage alloy, and the hydrogen storage alloy material may be magnesium-based hydrogen storage material, rare earth-based hydrogen storage material or titanium-based hydrogen storage material. The hydrogen storage device 21 can be internally provided with a fused salt coil pipe, so that the heat transfer efficiency between the fused salt and the solid hydride can be increased.
The hydrogen fuel cell power generation device 22 may employ any fuel cell technology using hydrogen as a fuel, and is not limited thereto.
Further, in the second circuit, the conventional island 14 may include a steam turbine 141, a generator 142, and a condenser 143, a second outlet end of the heat exchanger 12 is connected to the steam turbine 141, the steam turbine 141 is connected to the generator 142, and a second inlet end of the heat exchanger 12 is connected to an outlet end of the condenser 143.
Correspondingly, the heat exchanger 12 may be a salt-water heat exchanger 12, and is configured to realize heat exchange between molten salt and working medium water. In the operation process of the power generation system, the molten salt absorbed by heat and stored in the first energy storage device 131 can be conveyed to the heat exchanger 12, and the heat is transferred to the working medium water in the second loop, so that high-temperature steam can be generated for power generation. After that, the exhaust gas of the steam turbine 141 is condensed into water by the steam condenser 143 and is continuously circulated in the second circuit.
In order to improve the heat exchange efficiency and reduce the heat loss, the heat exchange energy storage medium stored in the energy storage device 13 and circularly transported in the first loop can specifically adopt binary molten salt(composition 40% KNO3+60％NaNO3) Ternary molten salt (component 7% NaNO)3+53％KNO3+40％NaNO2) And ternary molten salt (45% KNO)3+48％Ca(NO3)2+7NaNO3) And others with KNO3、NaNO3、NaNO2、Ca(NO3)2And the like as a constituent.
Specifically, the structure of the heat exchanger 12 may be set according to actual needs. In one embodiment, the heat exchanger 12 may be a shell-and-tube heat exchanger 12; in another embodiment, the heat exchanger 12 may be a double pipe heat exchanger 12 or another type of heat exchanger 12.
In order to increase the heat exchange efficiency of the heat exchanger 12, the heat exchanger 12 may be arranged in series, or may be arranged in one or more rows.
Further, in order to prevent the molten salt from solidifying below the freezing point, an immersion electric heater may be disposed in each of the first energy storage device 131 and the second energy storage device 132. An electric heat tracing assembly may be disposed on a pipeline of the first circuit, and an electric heat tracing assembly may be disposed on a pipeline connecting the energy storage device 13 and the hydrogen storage device 21.
In order that the invention may be better understood, specific implementations of the invention are set forth in detail below in the detailed description of specific embodiments.
In the embodiment of the present invention, the tower solar thermal collector 11 converts light energy into heat energy through the processes of reflection, focusing, absorption, and the like, so that the molten salt is heated to a certain temperature, the first switch valve 31 is opened, and the molten salt is conveyed to the first energy storage device 131 for storage.
And opening the second switch valve 32, allowing part or all of the molten salt to enter the heat exchanger 12 from the first energy storage device 131 according to the requirement of actual power consumption, transferring heat to the working medium water, allowing the working medium water to be heated and vaporized into qualified high-temperature high-pressure steam, allowing the high-temperature high-pressure steam to enter the steam turbine 141 for applying work, and generating power through the generator 142.
The molten salt, which has released heat in heat exchanger 12, enters second energy storage device 132. And opening the third switch valve 33, and enabling the molten salt to reenter the tower type solar heat collector 11 through the pump by the second energy storage device 132 to absorb heat, so that the temperature of the molten salt is increased.
When the power generation amount of the solar thermal power generation subsystem 10 cannot meet the demand of power consumption and the hydrogen power generation subsystem 20 is required to generate power, the first valve 41 and the second valve 42 are opened, the solid hydride in the hydrogen storage device 21 is heated by using the molten salt, so that hydrogen is desorbed, in the process, in order to ensure the proper hydrogen evolution temperature of the solid hydride, the fourth switch valve 34 and the fifth switch valve 35 can be opened, and the molten salt in the first energy storage device 131 and the molten salt in the second energy storage device 132 are mixed and then enter the solid hydrogen storage device 21.
And opening the third valve 43, allowing the released hydrogen to enter the hydrogen fuel cell power generation device 22, so as to realize conversion from chemical energy to electric energy and finally realize output of electric power, wherein the part of electric quantity can be used as service power and also can be used as on-grid electric quantity.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A power generation system, comprising:
the solar thermal power generation subsystem comprises a tower type solar thermal collector, a heat exchanger, an energy storage device and a conventional island, wherein the tower type solar thermal collector, the heat exchanger and the energy storage device are connected through pipelines to form a first loop, and the conventional island and the heat exchanger are connected through pipelines to form a second loop; the energy storage device is used for storing heat energy, and the first loop and the second loop exchange heat through the heat exchanger;
and the hydrogen energy power generation subsystem is connected with the energy storage device and converts the heat energy stored in the energy storage device into electric energy.
2. The power generation system of claim 1, wherein the energy storage device comprises a first energy storage device and a second energy storage device, an inlet end of the first energy storage device is connected with an outlet end of the tower type solar heat collector through a first switch valve, and an outlet end of the first energy storage device is connected with a first inlet end of the heat exchanger through a second switch valve; the inlet end of the second energy storage device is connected with the first outlet end of the heat exchanger, and the outlet end of the second energy storage device is connected with the inlet end of the tower type solar heat collector through a third switch valve.
3. The power generation system according to claim 2, wherein a communication pipeline is arranged between the first energy storage device and the second energy storage device, the first energy storage device is connected with one end of the communication pipeline through a fourth switch valve, and the second energy storage device is connected with the other end of the communication pipeline through a fifth switch valve.
4. The power generation system of claim 3, wherein the hydrogen energy generation subsystem comprises a hydrogen storage device and a hydrogen fuel cell power generation device, wherein an inlet end of the hydrogen storage device is connected with the communication pipeline through a first valve, and a first outlet end of the hydrogen storage device is connected with an inlet end of the second energy storage device through a second valve; and the second outlet end of the hydrogen storage device is connected with the inlet end of the hydrogen fuel cell power generation device through a third valve.
5. The power generation system of claim 4, wherein the first, second, and third valves are flow regulating valves.
6. The power generation system of claim 1, wherein in the second loop the conventional island includes a steam turbine, a generator and a condenser, the second outlet end of the heat exchanger is connected to the steam turbine, the steam turbine is connected to the generator, and the second inlet end of the heat exchanger is connected to the outlet end of the condenser.
7. The power generation system of claim 1, wherein the heat exchange energy storage medium in the first loop is a molten salt.
8. The power generation system of claim 1, wherein the heat exchanger is a salt-water heat exchanger.
9. The power generation system of claim 2, wherein both the first energy storage device and the second energy storage device have an electric immersion heater disposed therein.
10. The power generation system of claim 1, wherein the pipeline connecting the energy storage device and the heat exchanger is provided with an electric tracing assembly, and the pipeline connecting the energy storage device and the hydrogen energy power generation subsystem is provided with an electric tracing assembly.
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| CN202010074559.4A CN113153675A (en) | 2020-01-22 | 2020-01-22 | Power generation system |
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| CN202010074559.4A CN113153675A (en) | 2020-01-22 | 2020-01-22 | Power generation system |
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Citations (13)
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|---|---|---|---|---|
| CN103897736A (en) * | 2014-03-17 | 2014-07-02 | 中国科学院工程热物理研究所 | Integrated system for production, storage, transportation and utilization of hydrogen energy on basis of solar energy and biomass gasification |
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