CN114076416A - Thermoelectric comprehensive energy storage system for solar-thermal power generation and molten salt combined hydrogen production - Google Patents
Thermoelectric comprehensive energy storage system for solar-thermal power generation and molten salt combined hydrogen production Download PDFInfo
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 69
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 69
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 150000003839 salts Chemical class 0.000 title claims abstract description 47
- 238000004146 energy storage Methods 0.000 title claims abstract description 28
- 238000010248 power generation Methods 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000010521 absorption reaction Methods 0.000 claims abstract description 28
- 230000008859 change Effects 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000001301 oxygen Substances 0.000 claims abstract description 17
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 17
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 13
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005338 heat storage Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/60—Constructional parts of cells
- C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
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- 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
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/006—Methods of steam generation characterised by form of heating method using solar heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/30—Solar heat collectors using working fluids with means for exchanging heat between two or more working fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/90—Solar heat collectors using working fluids using internal thermosiphonic circulation
- F24S10/95—Solar heat collectors using working fluids using internal thermosiphonic circulation having evaporator sections and condenser sections, e.g. heat pipes
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- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
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- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
- F24S60/10—Arrangements for storing heat collected by solar heat collectors using latent heat
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- 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
- Y02E10/44—Heat exchange systems
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- 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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- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention discloses a thermoelectric comprehensive energy storage system for photo-thermal power generation and molten salt combined hydrogen production, wherein a heat absorption outlet of an oil-steam generator is communicated with an inlet of a steam turbine, an outlet of the steam turbine is divided into two paths after passing through a condenser, one path of the heat absorption outlet is communicated with a heat absorption side inlet of the oil-steam generator, and the other path of the heat absorption outlet is communicated with a heat absorption side inlet of the oil-steam generator through a heat absorption side of a molten salt phase change kettle; the output end of the steam turbine is connected with the driving shaft of a first generator, the output end of the first generator is connected with a power supply interface of the water electrolysis device and a power grid through a first direct-alternating current converter, an oxygen outlet of the water electrolysis device is communicated with an oxygen tank, a hydrogen outlet of the water electrolysis device is communicated with a hydrogen tank, an outlet of the hydrogen tank is communicated with a hydrogen inlet of a hydrogen battery, and the output end of the hydrogen battery is connected with the power grid through a second direct-alternating current converter.
Description
Technical Field
The invention belongs to the field of clean energy power engineering and energy storage, and relates to a thermoelectric comprehensive energy storage system for photo-thermal power generation and hydrogen production by combining molten salt.
Background
Under the premise of rapid development of global economy and continuous improvement of human living standard, the problems of energy crisis and environmental pollution are increased. Under the big background, people generally know that clean, safe, efficient and economic sustainable development energy sources are sought, the proportion of the sustainable development energy sources in primary energy production and consumption is improved, and the stable transformation of an electric power energy supply structure to green energy sources is promoted. By the end of 2018, the total amount of original equipment of various points in China reaches 190 million MW, which is increased by 6.7% compared with the original equipment in 2017. The accumulated installed capacity of the main renewable energy power generation reaches 73 ten thousand MW, and accounts for nearly 40% of the installed capacity of the national power supply. The solar power generation has accumulated 18 ten thousand MW of installed capacity, 4.5 ten thousand MW of newly added installed capacity and 34% of amplification. In terms of the installed proportion, the power generation installed machine in China mainly takes the traditional non-renewable fossil energy as the main energy. Renewable clean energy will gradually become an alternative to traditional energy sources, a fact that is not changeable. Therefore, the development of efficient, green and environment-friendly clean energy has become a core theme of the development of the current energy field.
The current mainstream clean energy mainly comprises wind energy, solar energy, biological energy, ocean energy, geothermal energy, hydrogen energy, water energy, nuclear energy and the like. Wherein, the water energy and nuclear energy are generally suitable for large-scale power stations; wind energy, ocean energy and geothermal energy have obvious regional characteristics; the biological energy has certain pollution to the environment when burning; the solar energy and hydrogen energy system is mature and reliable in technology, generally consists of common modular equipment suitable for conventional distributed power stations, and the system hardly has any pollution to the environment in energy conversion, so that the system has a good application prospect in the development of the distributed power stations.
The solar photo-thermal system has compact system structure, no pollution, high energy absorption efficiency, low pollution in the production process of system components, mature related design and operation technologies of a steam system and is paid more and more attention in remote and solar energy-rich areas. The solar photo-thermal system is characterized in that the input energy change within 24 hours per day is very obvious, higher requirements are provided for the variable working condition dynamic following characteristic and the variable working condition performance of the system in the operation process of the system, and the requirement for the output stability of the system caused by the large-range fluctuation of the input energy needs to be met. Therefore, the system is required to have a good dynamic compensation function on one hand, the change condition of the input energy of the system can be monitored in real time, and the steam power system is adjusted in advance to weaken the additional influence brought by the inertia of the system; in addition, in order to better meet the requirement of grid-connected peak regulation of a power grid, a power generation system generally needs to have an energy storage function, so that on the other hand, aiming at different user requirements in the daytime and at night, the energy storage system characteristics are combined, and energy storage system coupling optimization is carried out on the system so as to meet the stable output of the system under different requirements; and finally, energy storage scheme design is carried out on the heat energy link and the electric energy link respectively by combining different energy characteristics in the system energy transmission link so as to meet the requirements of different users in a larger energy fluctuation range.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a thermoelectric integrated energy storage system for photo-thermal power generation and molten salt combined hydrogen production, which can meet the requirement of a larger energy fluctuation range.
In order to achieve the purpose, the comprehensive thermoelectric energy storage system for photo-thermal power generation and molten salt combined hydrogen production comprises a condenser, a solar photo-thermal tower, an oil-steam generator, a steam turbine, a first generator, a condenser, a condensate pump, an electrolytic water device, an oxygen tank, a hydrogen battery, a direct-alternating current converter, a molten salt phase change kettle and an electric network;
the condenser lens is over against the solar photo-thermal tower, wherein the outlet of the solar photo-thermal tower is divided into two paths, one path is communicated with the heat release inlet of the molten salt phase change kettle, the other path is communicated with the heat release side inlet of the oil-steam generator, the heat release side outlet of the molten salt phase change kettle is communicated with the heat release side inlet of the oil-steam generator, and the heat release side outlet of the oil-steam generator is communicated with the inlet of the solar photo-thermal tower;
the heat absorption outlet of the oil-steam generator is communicated with the inlet of a steam turbine, the outlet of the steam turbine is divided into two paths after passing through a condenser, wherein one path is communicated with the heat absorption side inlet of the oil-steam generator, and the other path is communicated with the heat absorption side inlet of the oil-steam generator through the heat absorption side of the molten salt phase change kettle;
the output end of the steam turbine is connected with the driving shaft of a first generator, the output end of the first generator is connected with a power supply interface of the water electrolysis device and a power grid through a first direct-alternating current converter, an oxygen outlet of the water electrolysis device is communicated with an oxygen tank, a hydrogen outlet of the water electrolysis device is communicated with a hydrogen tank, an outlet of the hydrogen tank is communicated with a hydrogen inlet of a hydrogen battery, and the output end of the hydrogen battery is connected with the power grid through a second direct-alternating current converter.
The first generator is connected with the second generator through a speed reducer.
The heat release side outlet of the oil-steam generator is communicated with the inlet of the solar photo-thermal tower through a first valve.
The outlet of the solar photo-thermal tower is communicated with the heat-releasing side inlet of the oil-steam generator through a second valve.
The outlet of the solar photo-thermal tower is communicated with the heat release side inlet of the molten salt phase change kettle through a third valve.
The outlet of the condenser is communicated with the heat absorption side inlet of the oil-steam generator through a fourth valve.
And the heat absorption side outlet of the molten salt phase change kettle is communicated with the heat absorption side inlet of the oil-steam generator through a fifth valve.
The outlet of the hydrogen tank is communicated with the hydrogen inlet of the hydrogen battery through a sixth valve.
The invention has the following beneficial effects:
when the integrated thermoelectric energy storage system for photo-thermal power generation and molten salt combined hydrogen production is specifically operated, a connection mode of coupling heat conduction oil heating and molten salt energy storage is adopted, so that redundant energy is recovered when the input energy of the system is too high, the stored energy is released when the user demands a large amount of energy, and meanwhile, the energy storage and release processes are carried out by combining the phase change of molten salt, so that the latent heat of the phase change of the molten salt working medium is large, the system structure is compact, and the integrated thermoelectric energy storage system has good structural characteristics; in addition, under different working conditions, the motor is selectively output through the speed reducer, the generated electric energy is subjected to alternating current-direct current conversion and direct current-alternating current conversion, the electrolysis of water can be realized, oxygen and hydrogen can be generated, wherein the oxygen can be used as a chemical raw material for secondary utilization, the hydrogen can be further used for generating electricity through a hydrogen battery, the direct current and alternating current power requirements of users are supplemented, and the purpose of trial-change working condition adjustment according to the requirements of the users is achieved; meanwhile, when the output power is too large and a user cannot consume the electric energy, the system can quickly convert the generated electric energy into latent heat of liquefaction of molten salt and hydrogen molecular energy through the first-stage heat storage and the second-stage electricity storage; when the electric power demand of a user is increased, the energy of the liquid molten salt and the hydrogen molecular energy are converted into electric energy to be output, so that the power output adjusting capacity of the system is improved, and the inertia of the system is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a diagram of an operating state of the present invention;
fig. 3 is another operating state diagram of the present invention.
Wherein, 1 is a condenser, 2 is a solar photo-thermal tower, 3 is an oil-steam generator, 4 is a steam turbine, 5 is a first generator, 6 is a second generator, 7 is a condenser, 8 is a condensate pump, 9 is an electrolytic water device, 10 is an oxygen tank, 11 is a hydrogen tank, 12 is a hydrogen battery, 13 is a direct-alternating current converter, 14 is a fused salt phase change kettle, and 15 is a power grid.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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 only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. 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 disclosure. 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.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the integrated thermoelectric energy storage system for photothermal power generation and molten salt combined hydrogen production according to the present invention includes a condenser 1, a solar photothermal tower 2, an oil-steam generator 3, a steam turbine 4, a first generator 5, a second generator 6, a condenser 7, a condensate pump 8, an electrolytic water device 9, an oxygen tank 10, a hydrogen tank 11, a hydrogen battery 12, a direct-alternating current converter 13, a molten salt phase change kettle 14, and a power grid 15;
the condenser 1 is over against the solar photo-thermal tower 2, wherein the outlet of the solar photo-thermal tower 2 is divided into two paths, one path is communicated with the heat release inlet of the molten salt phase change kettle 14, the other path is communicated with the heat release side inlet of the oil-steam generator 3, the heat release side outlet of the molten salt phase change kettle 14 is communicated with the heat release side inlet of the oil-steam generator 3, and the heat release side outlet of the oil-steam generator 3 is communicated with the inlet of the solar photo-thermal tower 2;
the heat absorption outlet of the oil-steam generator 3 is communicated with the inlet of the steam turbine 4, the outlet of the steam turbine 4 is divided into two paths after passing through the condenser 7, wherein one path is communicated with the heat absorption side inlet of the oil-steam generator 3, and the other path is communicated with the heat absorption side inlet of the oil-steam generator 3 through the heat absorption side of the molten salt phase change kettle 14;
the output end of the steam turbine 4 is connected with the driving shaft of the first generator 5 and the driving shaft of the second generator 6, the output end of the first generator 5 and the output end of the second generator 6 are connected with the power interface of the water electrolysis device 9 and the power grid 15 through the first direct-alternating current converter 13, the oxygen outlet of the water electrolysis device 9 is communicated with the oxygen tank 10, the hydrogen outlet of the water electrolysis device 9 is communicated with the hydrogen tank 11, the outlet of the hydrogen tank 11 is communicated with the hydrogen inlet of the hydrogen battery 12, and the output end of the hydrogen battery 12 is connected with the power grid 15 through the second direct-alternating current converter 13.
The heat release side outlet of the oil-steam generator 3 is communicated with the inlet of the solar photo-thermal tower 2 through a first valve a; the outlet of the solar photo-thermal tower 2 is communicated with the heat release side inlet of the oil-steam generator 3 through a second valve b; the outlet of the solar photo-thermal tower 2 is communicated with the heat release side inlet of the molten salt phase change kettle 14 through a third valve c; an outlet on the heat absorption side of the molten salt phase change kettle 14 is communicated with an inlet on the heat absorption side of the oil-steam generator 3 through a fifth valve e, an outlet of the condenser 7 is communicated with an inlet on the heat absorption side of the oil-steam generator 3 through a fourth valve d, and an outlet of the hydrogen tank 11 is communicated with a hydrogen inlet of the hydrogen battery 12 through a sixth valve f.
Example one
Referring to fig. 1, in this embodiment, a condenser 1 converges a large area of sunlight onto a solar photo-thermal tower 2, and heats heat conduction oil to 400-. The saturated steam flow rate is 1050t/h under the rated working condition, and the rated output power is 5 MW. In the daytime, the input energy of the solar photo-thermal system continuously changes along with time, and at night, the input energy of the solar photo-thermal system is reduced to 0, so that the power generation system and the energy storage system are in a dynamic regulation state all the time. In the operation process of the system, the input energy is changed continuously, but the auxiliary operation of the energy storage system can ensure that the electric energy output in most of the day is kept relatively stable. This allows the system to achieve a relatively stable power output by utilizing a relatively unstable energy source, with good economic and social benefits.
When the system starts to work, the condensing lens 1 converges sunlight to one point for heating the heat-conducting oil storage tank above the solar photo-thermal tower 2. When the internal temperature of the heat conduction oil rises, the heat conduction oil heats the water vapor through the oil-vapor generator 3, and the heated saturated vapor directly enters the steam turbine 4 to do work. At this time, the fifth valve e is closed, and the saturated water discharged from the condenser 7 flows through the fourth valve d into the oil-steam evaporator 3, and enters the next cycle. The second generator 6 delivers the generated electrical energy into the electricity network 15. At the moment, the second valve b and the third valve c disconnect the molten salt energy storage system from the system, the reducer disconnects the second generator 6 from the first generator 5, the hydrogen production system does not work, and the system is in a stable power generation and energy non-storage state at the moment.
Example two
Referring to fig. 2, when the temperature of the heat transfer oil in the solar photo-thermal tower 2 exceeds the maximum heating temperature required by the steam power system, in order to ensure that the steam power system does not run under an overload, the heat transfer oil is heated up quickly, and the molten salt energy storage system needs to be started quickly, so that the energy absorbed by the heat transfer oil is transferred to the molten salt phase change kettle 14 quickly and stored. Therefore, at the moment, the opening degree of the second valve b needs to be reduced, the opening degree of the third valve c needs to be increased, the flow of the heat-conducting oil flowing through the oil-steam generator 3 is reduced, the flow of the heat-conducting oil flowing through the molten salt phase change kettle 14 is increased, more heat energy is stored in the molten salt phase change kettle 14, the maximum heat storage capacity can reach 20MWh, and the requirement that the system works for more than 15h under the condition of no light source is met. If the demand of the user is reduced, part of the shaft work received by the second generator 6 can be transferred to the first generator 5 through the speed reducer, and the electrolyzed water is electrolyzed through the direct-alternating current converter 13 to obtain oxygen and hydrogen respectively, and the oxygen and the hydrogen are stored in the hydrogen tank 11 and the oxygen tank 10.
EXAMPLE III
Referring to fig. 3, when night or rainy day occurs, the condenser lens 1 cannot receive energy, the solar photo-thermal tower 2 has no energy input, and at this time, the previously stored energy needs to be released into the system again for power generation or heat supply of the system. For the heat storage system, at the moment, the second valve b needs to be closed, the third valve c needs to be opened, the heat conducting oil circularly and continuously absorbs heat from the molten salt phase change kettle 14, the heat is transmitted to the water vapor through the oil-steam generator 3 again, and the steam turbine 4 is further pushed to do work. At this time, the sixth valve f is opened, and the hydrogen gas in the hydrogen tank 11 is also introduced into the hydrogen cell 12 to generate electricity. The generated electric energy can be directly used by direct current users, and can also be converted into alternating current through the direct current-alternating current converter 13 and then transmitted in a grid-connected mode.
Claims (8)
1. A thermoelectric comprehensive energy storage system for photo-thermal power generation and molten salt combined hydrogen production is characterized by comprising a condenser (1), a solar photo-thermal tower (2), an oil-steam generator (3), a steam turbine (4), a first generator (5), a condenser (7), a condensate pump (8), an electrolytic water device (9), an oxygen tank (10), a hydrogen tank (11), a hydrogen battery (12), a direct-alternating current converter (13), a molten salt phase change kettle (14) and an electric network (15);
the condenser lens (1) is over against the solar photo-thermal tower (2), wherein the outlet of the solar photo-thermal tower (2) is divided into two paths, one path is communicated with the heat release inlet of the molten salt phase change kettle (14), the other path is communicated with the heat release side inlet of the oil-steam generator (3), the heat release side outlet of the molten salt phase change kettle (14) is communicated with the heat release side inlet of the oil-steam generator (3), and the heat release side outlet of the oil-steam generator (3) is communicated with the inlet of the solar photo-thermal tower (2);
the heat absorption outlet of the oil-steam generator (3) is communicated with the inlet of the steam turbine (4), the outlet of the steam turbine (4) is divided into two paths after passing through the condenser (7), wherein one path is communicated with the heat absorption side inlet of the oil-steam generator (3), and the other path is communicated with the heat absorption side inlet of the oil-steam generator (3) through the heat absorption side of the molten salt phase change kettle (14);
the output end of the steam turbine (4) is connected with the driving shaft of a first generator (5), the output end of the first generator (5) is connected with the power interface of the water electrolysis device (9) and the power grid (15) through a first direct-alternating current converter (13), the oxygen outlet of the water electrolysis device (9) is communicated with an oxygen tank (10), the hydrogen outlet of the water electrolysis device (9) is communicated with a hydrogen tank (11), the outlet of the hydrogen tank (11) is communicated with the hydrogen inlet of a hydrogen battery (12), and the output end of the hydrogen battery (12) is connected with the power grid (15) through a second direct-alternating current converter (13).
2. The integrated thermal-electric energy storage system for solar-thermal power generation and molten salt hydrogen production according to claim 1, wherein the first generator (5) and the second generator (6) are connected through a reducer.
3. The integrated thermoelectric energy storage system for photo-thermal power generation and molten salt combined hydrogen production according to claim 1, wherein the outlet on the heat release side of the oil-steam generator (3) is communicated with the inlet of the solar photo-thermal tower (2) through a first valve (a).
4. The integrated thermoelectric energy storage system for photo-thermal power generation and molten salt hydrogen production according to claim 3, wherein the outlet of the solar photo-thermal tower (2) is communicated with the heat release side inlet of the oil-steam generator (3) through a second valve (b).
5. The integrated thermoelectric energy storage system for photo-thermal power generation and molten salt combined hydrogen production according to claim 4, wherein the outlet of the solar photo-thermal tower (2) is communicated with the heat release side inlet of the molten salt phase change kettle (14) through a third valve (c).
6. The integrated thermal-electric energy storage system for solar-thermal power generation and molten salt hydrogen production according to claim 5, wherein the outlet of the condenser (7) is communicated with the heat absorption side inlet of the oil-steam generator (3) through a fourth valve (d).
7. The integrated thermoelectric energy storage system for photo-thermal power generation and molten salt combined hydrogen production according to claim 6, wherein the outlet on the heat absorption side of the molten salt phase change kettle (14) is communicated with the inlet on the heat absorption side of the oil-steam generator (3) through a fifth valve (e).
8. The integrated thermoelectric energy storage system for solar-thermal power generation and molten salt combined hydrogen production according to claim 7, wherein the outlet of the hydrogen tank (11) is communicated with the hydrogen inlet of the hydrogen battery (12) through a sixth valve (f).
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