CN114094915B - Energy storage type high-temperature photovoltaic and photo-thermal integrated power generation system and method - Google Patents
Energy storage type high-temperature photovoltaic and photo-thermal integrated power generation system and method Download PDFInfo
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- 230000005494 condensation Effects 0.000 claims abstract description 21
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- 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
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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
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/30—Arrangements for concentrating solar-rays for solar heat collectors with lenses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S20/00—Supporting structures for PV modules
- H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/20—Optical components
- H02S40/22—Light-reflecting or light-concentrating means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/40—Thermal components
- H02S40/44—Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time
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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
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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
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
-
- 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
- Y02E10/60—Thermal-PV hybrids
Abstract
The invention relates to an energy storage type high-temperature photovoltaic and photo-thermal integrated power generation system and a method, wherein the system comprises a heat absorption tower, a photo-thermal assembly and a photovoltaic assembly; the photo-thermal assembly comprises a light condensing system, a high-temperature storage tank, a low-temperature storage tank, a heat exchange system, a turbine system, a generator and a heat absorption cavity; the heat absorption cavity is arranged above the heat absorption tower and comprises a heating surface pipeline and an ultraviolet visible light reflecting film arranged on the surface of the heating surface pipeline; a heat exchange medium is arranged in the heating surface pipeline, and the output end of the heat exchange medium is connected with the input end of the heat exchange medium through a high-temperature storage tank, a low-temperature storage tank and a heat release loop of a heat exchange system in sequence along the flowing direction; the heat absorption loop of the heat exchange system is connected with the turbine system for doing work, and the turbine system is coaxially connected with the generator; the photovoltaic module is arranged at a condensation focus of the heat absorption cavity and comprises a high-power condensation photovoltaic cell panel arranged along the incidence direction of light and a spectrum reflection film arranged on the surface of the high-power condensation photovoltaic cell panel; the condensing system is used for reflecting the direct radiation of the sun to the heating surface of the heat absorption cavity and the spectral reflection film.
Description
Technical Field
The invention relates to the field of solar power generation, in particular to an energy storage type high-temperature photovoltaic and photo-thermal integrated power generation system and method.
Background
Solar photovoltaic power generation is based on a solar photovoltaic module, converts light energy into electric energy, and is widely used as a novel renewable energy source. The solar photo-thermal power generation is based on concentrated solar energy, solar heat energy is collected by utilizing a large-scale parabolic mirror or a dish-shaped mirror surface, the collected heat energy is stored through a heat conducting medium, steam is generated through a heat exchange device, the steam drives a traditional turbine, and then a generator is driven to generate power. Because the photovoltaic and the photo-thermal utilize the energy of different wave bands of sunlight, the same light-gathering system can be utilized, and the light-splitting principle is utilized to realize the simultaneous generation of the photovoltaic and the photo-thermal, thereby forming the photovoltaic photo-thermal integrated power generation system.
The existing high-concentration photovoltaic system mainly comprises a disc type system, and the independent disc type high-concentration photovoltaic power generation system has limited heat collection capacity, so that the heat utilization capacity is limited, and the large-scale application cannot be realized. And the high-concentration photovoltaic photo-thermal integrated system (HCPT system) is utilized to generate electricity by utilizing the waste heat of the cooling medium, and is mainly used for coupling the HCPT and the organic Rankine cycle low-temperature power generation technology, namely the HCPT-ORC system. However, the HCPT-ORC system has the power generation efficiency of only 6% -10% due to the low temperature of the cooling water, and the contribution to the improvement of the power generation efficiency of the whole system is limited. Therefore, the conventional high-concentration photovoltaic and photo-thermal integrated system has the limitation that the system can only be coupled with low-temperature power generation circulation, and the photoelectric conversion efficiency of the conventional high-concentration photovoltaic and photo-thermal power generation system is low.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the energy storage type high-temperature photovoltaic and photo-thermal integrated power generation system and the method, which have the advantages of reasonable design, simple structure and wide application range, and can effectively improve the photoelectric conversion efficiency.
The invention is realized by the following technical scheme:
an energy storage type high-temperature photovoltaic and photo-thermal integrated power generation system comprises an endothermic tower, a photo-thermal assembly and a photovoltaic assembly;
the photo-thermal assembly comprises a light condensing system, a high-temperature storage tank, a low-temperature storage tank, a heat exchange system, a turbine system, a generator and a heat absorption cavity;
the heat absorption cavity is arranged above the heat absorption tower and comprises a heating surface pipeline and an ultraviolet visible light reflecting film arranged on the surface of the heating surface pipeline; a heat exchange medium is arranged in the heating surface pipeline, and the output end of the heat exchange medium is connected with the input end of the heat exchange medium through a high-temperature storage tank, a low-temperature storage tank and a heat release loop of a heat exchange system in sequence along the flowing direction; the heat absorption loop of the heat exchange system is connected with the turbine system for doing work, and the turbine system is coaxially connected with the generator;
the photovoltaic module is arranged at a condensation focus of the heat absorption cavity and comprises a high-power condensation photovoltaic cell panel arranged along the incidence direction of light and a spectrum reflection film arranged on the surface of the high-power condensation photovoltaic cell panel;
the light condensing system is used for reflecting the direct radiation of the sun to the heating surface of the heat absorbing cavity and the spectral reflection film.
Further, the heat absorption cavity adopts a parabolic rotary reflection cavity, the heating surface pipeline is composed of one or more groups of tube bundles, and the tube bundles adopt any one of spiral coils, return-type tube bundles and parallel straight tube bundles.
Furthermore, the heat exchange medium adopts any one of supercritical carbon dioxide, water, heat conducting oil and molten salt.
Furthermore, the spectral reflection film adopts a convex reflector.
Further, the condensing system adopts a tower heliostat field or a dish-type collector array.
Furthermore, the low-temperature storage tank and the high-temperature storage tank adopt any one of heat conduction oil heat storage, low-temperature fused salt heat storage, phase change heat storage and solid heat storage systems.
Further, the turbine system adopts a steam turbine or a supercritical carbon dioxide turbine system.
Furthermore, a cooling system is arranged between the turbine system inlet end and the heat exchange system.
An energy-storage type high-temperature photovoltaic photo-thermal integrated power generation method comprises the steps of,
the condensing system reflects the direct radiation of the sun to a heating surface of the heat absorption cavity and the spectral reflection film;
the reflected solar radiation middle infrared rays and far infrared rays are absorbed by the heat absorption cavity, and ultraviolet rays and visible rays are projected to the high-concentration photovoltaic cell panel through the spectrum reflection film to generate electricity and then are sent out;
the heat absorbed by the heat absorption cavity is sent into a high-temperature storage tank through a heat exchange medium, heat transfer fluid in the high-temperature storage tank transfers the heat to a power generation working medium through a heat exchange system, and the power generation working medium works in a turbine system to drive a power generator to generate power and then is sent out;
and the high-concentration photovoltaic cell panel and the generator are used for jointly generating electricity.
Further, the light condensing system adjusts the deflection angle according to the radiation angle of the sun.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the system, the photovoltaic module with the spectral reflection function is placed on the heat absorption tower, the spectral reflection film arranged on the surface of the high-concentration photovoltaic cell panel is utilized to separate infrared rays, far infrared rays and ultraviolet rays from visible light in solar direct radiation reflected by the light concentration system, the ultraviolet rays and the visible light are projected to the high-concentration photovoltaic cell panel to generate electricity and then are sent out, photovoltaic power generation is completed, the infrared rays and the far infrared rays are absorbed by the heat absorption cavity arranged on the heat absorption tower, heat is transmitted to heat transfer fluid in the high-temperature storage tank along the heat release loop through the heat transfer medium and is transmitted to the turbine system through the heat absorption loop, and then the generator is driven to generate electricity and then is sent out, so that photo-thermal power generation is completed, the coupling of the high-efficiency photovoltaic power generation and the high-thermal power generation system is realized, and on the basis of increasing a small investment, compared with the single high-concentration photovoltaic power generation system, the photoelectric conversion efficiency is additionally improved by more than 10%, the whole photoelectric conversion efficiency of the system is more than twice that of a conventional photo-thermal power generation system, and the problem that the conventional high-thermal integrated photovoltaic power generation system can only be effectively overcome, and the conventional low-temperature power generation system can not be coupled.
Furthermore, the heat absorption cavity adopted by the system is a parabolic rotary reflection cavity, and the cavity adopts one or more groups of tube bundles consisting of a spiral coil, a return tube bundle and one of parallel straight tube bundles, so that the solar straight radiation can be effectively collected, and the heat absorption efficiency of the system is improved.
Furthermore, the system of the invention ensures the heat transfer effect, is safe and reliable and improves the economic feasibility by using any one of supercritical carbon dioxide, water, heat conducting oil or low-temperature molten salt as a heat exchange medium.
Furthermore, the system provided by the invention adopts the convex reflector as the spectral reflection film, has a good reflection effect, can effectively ensure light separation, and improves the conversion efficiency of the system.
Furthermore, the system takes the tower heliostat field or the disc type heat collector array as a condensation system, and can collect the direct solar radiation to the maximum extent, so that the conversion efficiency of the photovoltaic component and the photo-thermal component is improved.
Furthermore, the system of the invention adopts any one of heat conduction oil heat storage, low-temperature fused salt heat storage, phase change heat storage or solid heat storage systems as the low-temperature storage tank and the high-temperature storage tank, so that the heat storage effect is good, the economy and the reliability are realized, the safety and the feasibility are realized, and the heat loss is small.
Furthermore, the system adopts any one of the turbine and the supercritical carbon dioxide turbine system as the turbine system, so that the system is efficient, economical, safe and effective.
Furthermore, the system can further ensure the reliability in the photoelectric conversion process of the whole system and improve the overall safety and the conversion efficiency by arranging the cooling system between the turbine system and the heat exchange system.
Drawings
Fig. 1 is a schematic structural diagram of a system according to an embodiment of the present invention.
In the figure: 1. the solar heat collecting device comprises a heat absorption cavity, a light collecting system, a high-power light collecting photovoltaic cell panel, a light spectrum reflecting film, a low-temperature storage tank, a high-temperature storage tank, a heat exchange system, a turbine system, a cooling system, a generator, a heat absorption tower and a heat exchange medium.
Detailed Description
The invention will now be described in further detail with reference to specific examples, which are intended to illustrate, but not to limit, the invention.
Example 1
The invention relates to an energy storage type high-temperature photovoltaic photo-thermal integrated power generation system, which is shown in figure 1 and comprises a heat absorption cavity 1, a light condensation system 2, a high-power light condensation photovoltaic cell panel 3, a spectrum reflection film 4, a low-temperature storage tank 5, a high-temperature storage tank 6, a heat exchange system 7, a turbine system 8, a cooling system 9, a generator 10, a heat absorption tower 11 and a heat exchange medium 12; the heat absorption cavity 1, the light condensation system 2, the low-temperature storage tank 5, the high-temperature storage tank 6, the heat exchange system 7, the turbine system 8 and the generator 10 are photo-thermal components, and the high-power light condensation photovoltaic cell panel 3 and the spectrum reflection film 4 are photovoltaic components;
the heat absorption cavity 1, the high-concentration photovoltaic cell panel 3 and the spectrum reflection film 4 form a receiver for focusing light beams together, and the receiver is arranged on the heat absorption tower 11; the heat absorption cavity 1 adopts a parabolic rotary reflection cavity structure, the cavity is composed of one or more groups of tube bundles, and the tube bundles can adopt any one of spiral coils, return tube bundles and parallel straight tube bundles; the heat absorption cavity 1 comprises a heating surface pipeline and an ultraviolet visible light reflecting film, wherein the surface of the heating surface pipeline is provided with the ultraviolet visible light reflecting film, and the inside of the heating surface pipeline is provided with a heat exchange medium 12; the heat exchange medium 12 can be supercritical carbon dioxide, water, heat conducting oil or low-temperature molten salt, and the flowing direction of the heat exchange medium is a high-temperature storage tank 6, a low-temperature storage tank 5 and a heat exchange system 7; the spectral reflection film 4 adopts a convex reflector;
the heat exchange system 7 comprises a heat release loop and a heat absorption loop; the heat absorption loop is connected with a turbine system 8; the heat release loop is connected with the input end of the heat exchange medium 12, and the heat absorption loop connected with the output end of the heat exchange medium 12 forms a heat transfer loop;
the high-concentration photovoltaic cell panel 3 is arranged at the focus of the heat absorption cavity 1, the spectral reflection film 4 is arranged on the inner surface, and the spectral reflection film 4 is a convex reflector and can transmit ultraviolet rays and visible light and reflect infrared rays and far infrared rays;
the low-temperature storage tank 5 and the high-temperature storage tank 6 can adopt heat conduction oil heat storage, low-temperature fused salt heat storage, phase change heat storage or solid heat storage modes;
the turbine system 8 can adopt a steam turbine or a supercritical carbon dioxide turbine system, is coaxially connected with the generator 10, and is provided with a cooling system 9 at the inlet end;
the condensing system 2 consists of hundreds to tens of thousands of heliostats, and reflects the direct radiation of the sun to the heating surface of the heat absorption cavity 1 and the spectral reflection film 4 through different deflection angles; the condensing system 2 may be a tower heliostat field or a dish collector array.
The working principle of the system is that the heat absorption cavity 1 absorbs infrared rays and far infrared rays in solar direct radiation reflected by the light condensation system 2, and the spectral reflection film 4 projects ultraviolet rays and visible rays in the solar direct radiation reflected by the light condensation system 2 to the high-power light condensation photovoltaic cell panel 3 for power generation and then sends out; after absorbing heat, the heat absorbing cavity 1 is sent into the high-temperature storage tank 6 through the heat exchange medium 12, heat transfer fluid in the high-temperature storage tank 6 transfers heat to a power generation working medium through the heat exchange system 7, the power generation working medium works in the turbine system 8 to drive the power generator 10 to generate power, and a coupling system for jointly generating power by the high-power concentrating photovoltaic panel 3 and the power generator 10 is formed.
Based on the system, the invention also provides an energy storage type high-temperature photovoltaic photo-thermal integrated power generation method, which comprises the following steps of,
the condensing system 2 reflects the direct radiation of the sun to the heating surface of the heat absorption cavity 1 and the spectral reflection film 4;
the reflected solar radiation middle infrared rays and far infrared rays are absorbed by the heat absorption cavity 1, and ultraviolet rays and visible rays are projected to the high-concentration photovoltaic cell panel 3 through the spectrum reflection film 4 to be sent out after power generation;
the heat absorbed by the heat absorption cavity 1 is sent into a high-temperature storage tank 6 through a heat exchange medium 12, heat is transferred to a power generation working medium through a heat exchange system 7 by heat transfer fluid in the high-temperature storage tank 6, and the power generation working medium works in a turbine system 8 to drive a generator 10 to generate power and then is sent out;
the high-concentration photovoltaic cell panel 3 and the generator 10 are completed to jointly generate power.
Wherein the condensing system 2 adjusts a deflection angle according to a radiation angle of the sun.
In the embodiment, 50MW is generally installed, a tower type lens field is adopted in the condensation system 2, heat transfer medium 12 in the heat absorption cavity 1 adopts heat transfer oil, the inlet temperature is 290 ℃, the outlet temperature is 393 ℃, the cut-off wavelength of the spectral reflection film 4 is 900nm, the optical efficiency of a design point is 80%, the overflow loss is 10%, the efficiency of the high-power condensation photovoltaic module 3 is 28%, the overall thermal efficiency of a receiver is 50%, the thermoelectric conversion efficiency is 33%, and the total loss is 0.96, and the comprehensive photoelectric efficiency of the system is 30.75%.
Example two
In the embodiment, the overall installation is 1MW, the condensing system 2 adopts a disc-type reflector, the heat exchange medium 12 in the heat absorption cavity 1 adopts heat conduction oil, the inlet temperature is 290 ℃, the outlet temperature is 393 ℃, the cut-off wavelength of the spectral reflection film is 900nm, the optical efficiency of the design point is 85%, the efficiency of the high-power condensing photovoltaic module is 28%, the overall thermal efficiency of the receiver is 50%, the thermoelectric conversion efficiency is 33%, the total loss is 0.96, and the comprehensive photoelectric efficiency of the system is 36.3%.
Example III
In the embodiment, the total installed power is 5MW, the condensing system 2 adopts a disc-type reflector array, the heat exchange medium 12 in the heat absorption cavity 1 adopts supercritical carbon dioxide, the inlet temperature is 290 ℃, the outlet temperature is 393 ℃, the cut-off wavelength of the spectral reflection film is 900nm, the optical efficiency of the design point is 85%, the efficiency of the high-power condensing photovoltaic module is 28%, the overall thermal efficiency of the receiver is 50%, the thermoelectric conversion efficiency is 40%, the total loss is 0.96, and the comprehensive photoelectric efficiency of the system is 39.2%.
Example IV
In the embodiment, the total installed power is 50MW, the condensing system 2 adopts a tower-type lens field, the heat exchange medium 12 in the heat absorption cavity 1 adopts supercritical carbon dioxide, the inlet temperature is 290 ℃, the outlet temperature is 530 ℃, the cut-off wavelength of the spectral reflection film 4 is 900nm, the optical efficiency of a design point is 80%, the overflow loss is 10%, the efficiency of the high-power condensing photovoltaic module 3 is 28%, the overall thermal efficiency of a receiver is 50%, the thermoelectric conversion efficiency is 46%, and the total loss is 0.96, and the comprehensive photoelectric efficiency of the system is 35.25%.
Claims (8)
1. The energy storage type high-temperature photovoltaic and photo-thermal integrated power generation system is characterized by comprising an endothermic tower (11), a photo-thermal assembly and a photovoltaic assembly;
the photo-thermal assembly comprises a light condensing system (2), a high-temperature storage tank (6), a low-temperature storage tank (5), a heat exchange system (7), a turbine system (8), a generator (10) and a heat absorption cavity (1);
the heat absorption cavity (1) is arranged above the heat absorption tower (11) and comprises a heating surface pipeline and an ultraviolet visible light reflecting film arranged on the surface of the heating surface pipeline; a heat exchange medium (12) is arranged in the heating surface pipeline, and the output end of the heat exchange medium (12) sequentially passes through the high-temperature storage tank (6), the low-temperature storage tank (5) and the heat release loop of the heat exchange system (7) along the flow direction and is connected with the input end of the heat exchange medium (12); the heat absorption loop of the heat exchange system (7) is connected with the turbine system (8) to do work, and the turbine system (8) is coaxially connected with the generator (10);
the photovoltaic module is arranged at a condensation focus of the heat absorption cavity (1) and comprises a high-power condensation photovoltaic cell panel (3) arranged along the incidence direction of light and a spectrum reflection film (4) arranged on the surface of the high-power condensation photovoltaic cell panel (3);
the light condensation system (2) is used for reflecting the direct radiation of the sun to the heating surface of the heat absorption cavity (1) and the spectral reflection film (4); the spectral reflection film (4) adopts a convex reflector;
the heat absorption cavity (1) adopts a parabolic rotary reflection cavity, a heating surface pipeline is composed of one or more groups of tube bundles, and the tube bundles adopt any one of spiral coils, return-type tube bundles and parallel straight tube bundles.
2. The energy storage type high-temperature photovoltaic and photo-thermal integrated power generation system according to claim 1, wherein the heat exchange medium (12) adopts any one of supercritical carbon dioxide, water, heat conduction oil and molten salt.
3. The energy storage type high-temperature photovoltaic and photo-thermal integrated power generation system according to claim 1, wherein the condensation system (2) adopts a tower heliostat field or a dish type heat collector array.
4. The energy storage type high-temperature photovoltaic and photo-thermal integrated power generation system according to claim 1, wherein the low-temperature storage tank (5) and the high-temperature storage tank (6) adopt any one of heat conduction oil heat storage, low-temperature molten salt heat storage, phase change heat storage and solid heat storage systems.
5. The energy storage type high-temperature photovoltaic and photo-thermal integrated power generation system according to claim 1, wherein the turbine system (8) adopts a steam turbine or a supercritical carbon dioxide turbine system.
6. The energy storage type high-temperature photovoltaic and photo-thermal integrated power generation system according to claim 1, wherein a cooling system (9) is further arranged between the inlet end of the turbine system (8) and the heat exchange system (7).
7. An energy storage type high-temperature photovoltaic photo-thermal integrated power generation method, which is characterized in that the system based on any one of the claims 1-6 comprises,
the condensing system (2) reflects the direct radiation of the sun to the heating surface of the heat absorbing cavity (1) and the spectral reflection film (4);
the reflected solar radiation middle infrared rays and far infrared rays are absorbed by the heat absorption cavity (1), ultraviolet rays and visible rays are projected to the high-concentration photovoltaic cell panel (3) through the spectrum reflection film (4) to generate electricity and then are sent out;
the heat absorbed by the heat absorption cavity (1) is sent into a high-temperature storage tank (6) through a heat exchange medium (12), heat is transferred to a power generation working medium through a heat exchange system (7) by heat transfer fluid in the high-temperature storage tank (6), and the power generation working medium is sent out after generating power in a turbine system (8) by acting to drive a power generator (10);
and (3) finishing the co-generation of the high-concentration photovoltaic cell panel (3) and the generator (10).
8. The energy-storage type high-temperature photovoltaic photo-thermal integrated power generation method according to claim 7, wherein the light focusing system (2) adjusts the deflection angle according to the radiation angle of the sun.
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| PCT/CN2022/102086 WO2023093040A1 (en) | 2021-11-25 | 2022-06-28 | Energy storage type high-temperature photovoltaic and photothermal integrated power generation system and method |
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| NZ740246A (en) * | 2015-07-29 | 2019-04-26 | Bolymedia Holdings Co Ltd | Enclosed solar energy utilization device and system |
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| CN106014889A (en) * | 2016-06-17 | 2016-10-12 | 西安交通大学 | Tower type solar photo-thermal and photovoltaic combined power generating system |
| CN108444117A (en) * | 2018-05-17 | 2018-08-24 | 山东建筑大学 | A kind of device and method of solar energy hot-cast socket and the composite heat supply of accumulation of energy |
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