CN114593529A - Light-splitting absorption heat collection assembly, photovoltaic cogeneration system and electric energy storage system - Google Patents
Light-splitting absorption heat collection assembly, photovoltaic cogeneration system and electric energy storage system Download PDFInfo
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- CN114593529A CN114593529A CN202210490972.8A CN202210490972A CN114593529A CN 114593529 A CN114593529 A CN 114593529A CN 202210490972 A CN202210490972 A CN 202210490972A CN 114593529 A CN114593529 A CN 114593529A
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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
- F24S10/40—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
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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
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
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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
- F24S50/00—Arrangements for controlling solar heat collectors
- F24S50/20—Arrangements for controlling solar heat collectors for tracking
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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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
- H02S10/20—Systems characterised by their energy storage 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
- H02S20/00—Supporting structures for PV modules
- H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
- H02S20/32—Supporting structures being movable or adjustable, e.g. for angle adjustment specially adapted for solar tracking
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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
- H02S40/20—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
- H02S40/42—Cooling means
- H02S40/425—Cooling means using a gaseous or a liquid coolant, e.g. air flow ventilation, water circulation
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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
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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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- 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
- Y02E10/47—Mountings or tracking
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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
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention provides a light-splitting absorption and heat collection assembly, a photovoltaic cogeneration system and an electric energy storage system, and relates to the technical field of photovoltaic power generation. The light-splitting absorption heat collection component comprises a heat collection pipe and a light ray collector; the heat collecting pipe comprises a first pipe; the first pipe is externally provided with a heat insulation layer; the light condenser is provided with a light collecting cavity for converging light; the light rays converged by the light collection cavity are absorbed by the spectrum heat-conducting fluid medium, and the light rays which are not absorbed are emitted out of the heat collection tube. The photovoltaic cogeneration system comprises a condenser lens, a photovoltaic cell and a light-splitting absorption heat collection assembly. The electric energy storage system comprises a photovoltaic cogeneration system, a plurality of storage battery packs, an electric quantity monitoring assembly, a heating assembly and a power supply change-over switch. The light-splitting absorption heat collection assembly, the photovoltaic combined heat and power system and the electric energy storage system can generate high-temperature heat energy with higher heat energy quality, so that the comprehensive utilization rate of light energy is improved, and the electric energy utilization rate is improved.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a light-splitting absorption and heat collection assembly, a photovoltaic cogeneration system and an electric energy storage system.
Background
A Concentrated Photovoltaic (CPV) technology is a power generation technology that generates power by concentrating a large area of sunlight on a small area using optical elements such as lenses or mirrors and using a photovoltaic effect. The concentrated sunlight is projected on the solar panel, and the focus position can generate high heat, so that on one hand, heat loss can be generated, on the other hand, the surface temperature of the photovoltaic cell can be rapidly increased, and the local temperature of the photovoltaic cell can be increased, so that the photoelectric conversion efficiency of the photovoltaic cell can be reduced. The output electric quantity can be increased by 0.2-0.5% when the temperature of the battery component is reduced by 1K. And long-time high temperature can bring irreversible damage to the photovoltaic cell, thereby reducing conversion efficiency and influencing service life. Therefore, a heat exchange cooling system is usually added at the back of the photovoltaic module, cooling water after heat exchange can reach 50-70 ℃, the cooling water can also be used for cogeneration to improve comprehensive energy utilization efficiency, but the problem of overhigh local temperature cannot be fundamentally solved by a heat exchange mode, and the utilization value of the cooling water is not high due to low temperature of the cooling water.
Disclosure of Invention
The invention aims to provide a light-splitting, absorbing and heat-collecting component to solve the technical problem of low comprehensive energy utilization rate of light in a photovoltaic cogeneration system.
The invention provides a light-splitting absorption heat-collecting component which is applied to a photovoltaic power generation system, wherein the light-splitting absorption heat-collecting component comprises a heat-collecting tube and a light concentrator;
the heat collecting tube comprises a first tube, the first tube is used for circulating a spectrum heat-conducting fluid medium, and the first tube is provided with a first light-transmitting part and a second light-transmitting part which can transmit light; the first pipe is externally provided with a heat-insulating layer which is provided with a first light-transmitting hole and a second light-transmitting hole, the first light-transmitting hole is arranged at the first light-transmitting part, and the second light-transmitting hole is arranged at the second light-transmitting part;
the light collector is arranged in the first light-transmitting hole and is provided with a light collecting cavity for collecting light;
the light rays converged by the light collection cavity sequentially pass through the first light transmission hole and the first light transmission part to enter the first tube and be absorbed by the spectrum heat-conducting fluid medium, and the light rays which are not absorbed sequentially pass through the second light transmission part and the second light transmission hole to be emitted out of the heat collection tube.
Furthermore, the heat collecting tube also comprises a second tube sleeved outside the first tube, the second tube can transmit light, and a gap between the first tube and the second tube is a vacuum layer; the heat-insulating layer is sleeved outside the second pipe.
Further, the second tube is a quartz glass tube;
and/or the first light-transmitting hole is provided with a plurality, and the corresponding second light-transmitting hole and the corresponding light collector are provided with a plurality;
and/or the first tube is a light transmission tube which can transmit light on the whole.
Further, the light rectifier is used for rectifying the light emitted from the second light-transmitting hole into a light beam suitable for power generation of the photovoltaic cell.
The light-splitting absorption heat collection assembly has the beneficial effects that:
according to the light-splitting absorption heat collection assembly provided by the invention, the heat insulation layer is arranged outside the first tube, and the first light hole and the second light hole are respectively arranged at the positions, needing light transmission, of the heat insulation layer; the first light-transmitting part of the first tube is positioned in the first light-transmitting hole, so that incident light is incident into the first tube, the spectrum heat-conducting fluid medium in the first tube absorbs corresponding light, these are non-responsive band light which tends to raise the temperature of the assembly/device, and at the same time, these rays do not enable the photovoltaic cells to produce the photovoltaic effect (photovoltaic effect) or the photoelectric conversion efficiency is extremely low, the heat generated after the light is directly absorbed is stored by the spectrum heat-conducting fluid medium in the first tube, and because the heat-insulating layer except the first light-transmitting hole and the second light-transmitting hole, other parts are arranged around the periphery of the first pipe to insulate the first pipe, thereby greatly reducing heat loss, and then obtain and store more heats, produce the higher high temperature heat energy of heat energy quality, and then solve the technical problem that current photovoltaic light and heat integration system heat energy quality is low, improved the energy comprehensive utilization of light greatly.
The second objective of the present invention is to provide a photovoltaic-thermal cogeneration system, which includes a collecting lens, a photovoltaic cell and the above-mentioned light splitting and absorbing heat collecting assembly, wherein light collected by the collecting lens enters a first tube of the heat collecting tube through a light collecting cavity of a light collector, a part of the light is absorbed by a spectrum heat conducting fluid medium in the first tube, and the light that is not absorbed enters the photovoltaic cell to generate electricity after being emitted out of the heat collecting tube.
Furthermore, the collecting mirror is a plurality of collecting mirrors, and each collecting mirror can focus light points;
and/or, the photovoltaic cell has a plurality.
Further, the light gathering reflector mainly comprises a butterfly light gathering reflector with light gathering performance and/or a multiple reflection coupling transmission system.
Further, still include:
the solar photovoltaic combined heat and power generation system comprises an altitude tracking system and an altitude adjusting assembly, wherein the altitude tracking system is used for tracking the altitude of the sun, and the altitude adjusting assembly is used for adjusting the altitude of the photovoltaic combined heat and power system;
and/or the azimuth tracking system is used for tracking the azimuth of the sun, and the azimuth adjusting assembly is used for adjusting the azimuth of the photovoltaic cogeneration system.
Further, the azimuth angle adjusting assembly comprises an arc-shaped guide rail, and the photovoltaic cogeneration system can move along the arc-shaped guide rail in the process of adjusting the azimuth angle.
Further, a heat exchange cooler is arranged on the back face of the photovoltaic cell and used for cooling the photovoltaic cell.
The photovoltaic combined heat and power system provided by the invention has the beneficial effects that:
according to the photovoltaic cogeneration system provided by the invention, in the photovoltaic power generation process, light rays are converged by the condenser lens and are incident to the light collecting cavity, the light collecting cavity converges the light rays and is incident into the first tube through the first light hole, the light collecting cavity can converge more light rays, so that a spectrum heat conduction fluid medium in the heat collecting tube obtains/stores more heat, meanwhile, the converged light rays not only comprise non-response waveband light rays, but also comprise response waveband light rays which can enable the photovoltaic cell to generate the photovoltaic effect, and the more the response waveband light rays are, the conversion rate of the photovoltaic cell is improved; when light is focused into the first tube, the heat collecting tube obtains more heat, namely, high-temperature heat energy with higher heat energy quality is generated, and the comprehensive utilization rate of light energy is greatly improved. That is, the photovoltaic cogeneration system includes the above-mentioned light-splitting heat-absorbing heat-collecting component, so that all the advantages of the above-mentioned light-splitting heat-absorbing heat-collecting component are provided, and the details are not described herein.
In the invention, the non-response waveband light refers to light corresponding to a waveband incapable of generating a photovoltaic effect, and mainly comprises light with a high thermal effect; the response wave band light refers to the light corresponding to the wave band capable of generating photovoltaic effect.
The invention also provides an electric energy storage system, which comprises the photovoltaic cogeneration system;
the photovoltaic power generation system comprises a plurality of storage battery packs, an electric quantity monitoring assembly, a heating assembly and a power supply changeover switch, wherein the storage battery packs are used for storing electric energy generated by the photovoltaic power generation system, the electric quantity monitoring assembly is used for monitoring the electric quantity of the storage battery packs, the heating assembly is used for heating the heat collecting pipes, and the power supply changeover switch is used for switching the power supply direction;
when the electric quantity monitoring assembly monitors the full electric quantity of the storage battery pack, the power supply direction is switched to the heating assembly or the commercial power grid through the power supply change-over switch.
The electric energy storage system provided by the invention has the beneficial effects that:
the power generation energy storage system provided by the invention comprises the photovoltaic cogeneration system, so that the power generation energy storage system has all the advantages of the photovoltaic cogeneration system, namely: high-temperature heat energy with higher heat energy quality can be generated, the comprehensive utilization rate of light energy is greatly improved, and details are not repeated; in addition, when the storage battery pack is fully charged, the electric energy generated by the photovoltaic power generation system is stored in the storage battery pack, and when the storage battery pack is fully charged, the power supply direction is switched to the heating assembly through the power supply change-over switch, so that the heating assembly is used for heating the heat pipe in a butt joint mode, or the power supply direction is switched to the municipal power grid, so that the natural resource solar energy is fully utilized, and the electric energy utilization rate is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic view of a light-splitting, absorption and collection thermal assembly and a photovoltaic cogeneration system according to an embodiment of the invention;
FIG. 2 is a schematic side view of the heat collecting tube shown in FIG. 1;
fig. 3 is a schematic perspective view of the light-splitting, absorption, heat-collecting assembly and the combined photovoltaic-thermal power system shown in fig. 1, wherein the photovoltaic cell is not shown;
fig. 4 is a schematic top view of fig. 3, showing the track (curved guide rail) and its general position/connection relationship with each group of collecting lens, heat collecting pipe and heat collecting main pipe.
Description of reference numerals:
100-heat collecting tube;
110-a first tube;
120-spectral thermally conductive fluid medium;
130-insulating layer; 131-a first light-transmitting hole; 132-a second light-transmitting aperture;
140-a second tube;
150-vacuum layer;
160-heat collecting main pipe;
200-a light concentrator;
300-a light rectifier;
400-a condenser lens;
500-a photovoltaic cell;
600-heat exchange coolers;
700-arc guide rail.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
An embodiment of the present invention provides a light-splitting absorption and collection thermal assembly, a photovoltaic cogeneration system, and an electric energy storage system, which are described in detail below with reference to fig. 1 to 4.
The light-splitting, absorbing and heat-collecting assembly provided by the embodiment of the invention is applied to a photovoltaic power generation system, and as shown in fig. 1 and fig. 2, the light-splitting, absorbing and heat-collecting assembly comprises a heat-collecting tube 100 and a light concentrator 200.
The heat collecting tube 100 includes a first tube 110, the first tube 110 is used for circulating a spectrum heat conducting fluid medium 120, and the first tube 110 has a first light-transmitting portion and a second light-transmitting portion capable of transmitting light; the first tube 110 is externally provided with a heat insulating layer 130, the heat insulating layer 130 is provided with a first light hole 131 and a second light hole 132, the first light hole 131 is arranged on the first light transmission part, and the second light hole 132 is arranged on the second light transmission part.
The light collector 200 is disposed in the first light hole 131 and has a light collecting cavity for collecting light.
The light converged by the light collection cavity sequentially passes through the first light transmission hole 131 and the first light transmission part to enter the first tube 110 and be absorbed by the spectrum heat-conducting fluid medium 120, and the light which is not absorbed sequentially passes through the second light transmission part and the second light transmission hole 132 to be emitted out of the heat collection tube 100.
In the embodiment of the present invention, the heat insulating layer 130 is disposed outside the first tube 110 of the light splitting, absorbing and heat collecting assembly, and light holes are disposed at the positions of the heat insulating layer 130, where light is required to pass through, and are respectively the first light hole 131 and the second light hole 132, where the first light hole 131 is used for passing incident light and the second light hole 132 is used for passing emergent light; the first light-transmitting portion of the first tube 110 is located at the first light-transmitting hole 131, and is used for transmitting light, so that incident light is incident into the first tube 110, the spectral heat-conducting fluid medium 120 in the first tube 110 absorbs corresponding light, which is non-responsive waveband light (e.g., far infrared light, ultraviolet light, etc.) that is easy to raise the temperature of the component/device, and at the same time, the light cannot cause the photovoltaic cell 500 to generate a photovoltaic effect (photovoltaic effect) or have an extremely low photoelectric conversion efficiency, and heat generated after the light is directly absorbed is stored by the spectral heat-conducting fluid medium 120 in the first tube 110, because the heat-insulating layer 130 is arranged around the periphery of the first tube 110 except the first light-transmitting hole 131 and the second light-transmitting hole 132, so as to insulate the first tube 110, thereby greatly reducing heat loss, further obtaining and storing more heat, and generating high-temperature heat energy with higher heat quality, and then solve the technical problem that current photovoltaic light and heat integration system heat energy quality is low. On the other hand, in the photovoltaic power generation process, since the heat collecting tube 100 absorbs the light of the non-response band, the heat collecting tube 100 just serves as a light filter with high heat absorption effect, i.e., pre-filtering out non-responsive band light (absorbed by the spectral heat transfer fluid medium 120), reducing non-responsive band light exiting the second light transmissive hole 132, thereby reducing or even avoiding the non-responsive band light incident on the photovoltaic cell 500, transmitting only the responsive band light (e.g., visible light, etc.) capable of producing the photovoltaic effect, compared with the existing photovoltaic cell 500 system, the light-splitting absorption heat collection assembly provided by the embodiment of the invention obviously reduces the heat incident to the photovoltaic cell 500, reduces the temperature of the photovoltaic cell 500 through phase change, and solves the problems of low equipment efficiency and short service life of the photovoltaic cell 500 due to local high temperature.
In the embodiment of the present invention, the light collecting cavity of the light collector 200 collects light, and the light is incident into the first tube 110 through the first light hole 131, and the light collecting cavity can collect more light, so that the spectrum heat-conducting fluid medium 120 in the heat collecting tube 100 can obtain/store more heat, meanwhile, the collected light includes not only non-response band light, but also response band light which can enable the photovoltaic cell 500 to generate photovoltaic effect, and the more these response band light, the conversion rate of the photovoltaic cell 500 is improved; when light is focused into the first tube 110, the heat collecting tube 100 will obtain more heat, i.e. generate high temperature heat with higher heat quality, which greatly improves the comprehensive utilization rate of light energy and the efficiency of the system exergy.
In the embodiment of the present invention, as shown in fig. 1 and fig. 2, the heat collecting tube 100 further includes a second tube 140 sleeved outside the first tube 110, the second tube 140 is transparent, and a gap between the first tube 110 and the second tube 140 is a vacuum layer; the insulating layer 130 is sleeved outside the second pipe 140. The vacuum layer can further preserve heat stored in the first pipe 110, and high-temperature heat with high heat quality is further ensured.
Specifically, in the embodiment of the present invention, the second tube 140 is a quartz glass tube, which not only has a certain vacuum degree with the gap between the first tube 110, but also can effectively transmit light.
The first light hole 131 is provided with a plurality of light holes, and the corresponding second light hole 132 and the light collector 200 are provided with a plurality of light holes, so that when the photovoltaic power generation system is arranged, the distributed photovoltaic power generation system can be arranged, and centralized heat collection is realized.
In the embodiment of the present invention, the first tube 110 is a light-transmitting tube which is transparent to light as a whole.
In the embodiment of the present invention, as shown in fig. 1, the light rectifier 300 is further included for rectifying the light emitted from the second light-transmitting hole 132 into a light beam suitable for the photovoltaic cell 500 to generate electricity. Specifically, the light rectifier 300 includes an optical integrator disposed between the light focus and the photovoltaic cell, and the optical integrator is disposed near the second light hole 132 to rectify the converging light emitted from the second light hole 132 into a light beam required by the photovoltaic cell 500, for example, a parallel light vertically incident to the photovoltaic cell 500. It should be noted that the optical integrator may be replaced by a single-sided or double-sided convex lens, which is not limited herein, and it is within the scope of the present invention as long as the light can be rectified into a suitable light beam.
Of course, the light rectifier 300 may also include a concave lens, again positioned to rectify light into the beam required by the photovoltaic cell 500. The concave lens can be a single-sided concave surface or both concave surfaces, and is not limited herein, as long as the concave lens can rectify light rays into appropriate light beams, and the concave lens is within the scope of the invention; at this time, the light focus is located between the concave lens and the photovoltaic cell, and the concave lens is disposed at a position close to the second light-transmitting hole 132 to rectify the converging light emitted from the second light-transmitting hole 132 into a light beam required by the photovoltaic cell 500, for example, a parallel light vertically incident to the photovoltaic cell 500.
The photovoltaic cogeneration system provided by the embodiment of the invention comprises: as shown in fig. 1-4, the light collected by the collecting mirror 400, the photovoltaic cell 500 and the above-mentioned light splitting and absorbing heat collecting assembly are incident into the first tube 110 of the heat collecting tube 100 through the light collecting cavity of the light collector 200, a part of the light is absorbed by the spectrum heat-conducting fluid medium 120 in the first tube 110, and the light which is not absorbed is emitted out of the heat collecting tube 100 and then incident into the photovoltaic cell 500 to generate power.
In the photovoltaic cogeneration system provided by the embodiment of the invention, during photovoltaic power generation, light can be converged by the condenser 400 and then incident on the light collecting cavity, the light collecting cavity converges light and emits the converged light into the first tube 110 through the first light transmission hole 131, the light collecting cavity converges more light, and further the spectrum heat-conducting fluid medium 120 in the heat collecting tube 100 obtains/stores more heat, meanwhile, the converged light not only includes non-response band light, but also includes response band light which can enable the photovoltaic cell 500 to generate photovoltaic effect, and the more the response band light, the conversion rate of the photovoltaic cell 500 is improved; when light is focused into the first tube 110, the heat collecting tube 100 will obtain more heat, i.e. generate high temperature heat with higher heat quality. That is, the photovoltaic cogeneration system includes the above-mentioned light-splitting heat-absorbing heat-collecting component, so that all the advantages of the above-mentioned light-splitting heat-absorbing heat-collecting component are provided, and the details are not described herein.
In the prior art, in order to reduce the nonresponsive waveband light directly incident to the photovoltaic cell 500, a structural mode of setting a light splitter is generally adopted, most of the adopted schemes are to set a reflective film, the nonresponsive waveband light is reflected to a heat absorption assembly to absorb heat, and the response waveband light capable of enabling the photovoltaic cell 500 to generate a photoelectric effect is incident to the photovoltaic cell 500.
In the embodiment of the present invention, when the first light-transmitting portion and/or the second light-transmitting portion of the first tube 110 are/is a convex surface, at this time, the structure formed by the first tube 110 and the spectrum heat-conducting fluid medium 120 therein is similar to a convex lens structure, and when light passes through the first tube 110 and the spectrum heat-conducting fluid medium 120 therein, the light passes through the convex lens, that is, the heat collecting tube 100 has a function of converging light, so that the light converging multiple can be increased, and further, the power generation efficiency can be increased. That is, the heat collecting tube 100 can not only improve the heat storage efficiency, but also converge light to improve the power generation efficiency, so that the high-quality heat energy can be improved while the photovoltaic power generation efficiency is ensured or even improved, the structure of the whole photovoltaic power generation system can be simplified, and the cost is further reduced; in the embodiment of the invention, because the heat collecting tube 100 can directly absorb the non-response waveband light, a light splitter and an expensive reflecting film are not required to be specially arranged, and the cost is further reduced; in addition, when the first tube and the photovoltaic heat-conducting fluid medium in the first tube have a light-gathering function, higher-power gathering light can be obtained, the design size of the photovoltaic cell can be reduced, and the manufacturing cost of the photovoltaic cell is reduced; compared with the prior art, the photovoltaic cogeneration system provided by the embodiment of the invention has the advantages of simple structure, multiple functions, high power generation rate (photoelectric conversion rate) and low cost.
In the embodiment of the invention, the spectrum heat-conducting fluid medium is selected from fluid formed by organic working media or molten salt with selective absorption function on spectra, such as heat-conducting oil, silicone oil, CoCl2, CoSO4, CuSO4 and the like. Specifically, the first tube 110 may be a circular tube or an elliptical tube, or may also be a rectangular tube or a tube assembly with a light path adjusting function, such as an optical integrator/concave lens/convex lens, etc., where the spectral heat transfer fluid medium flows in the first tube 110 for heat exchange.
In the embodiment of the present invention, the photovoltaic cell 500 may be any cell capable of absorbing solar energy to generate photovoltaic effect (photoelectric effect) power generation, and includes: crystalline silicon cells, amorphous silicon cells, perovskite cells, gallium arsenide cells, and the like.
Specifically, in the embodiment of the present invention, as shown in fig. 3, the collecting mirror 400 is a plurality of collecting mirrors, and each collecting mirror 400 can focus light; the photovoltaic cell 500 has a plurality. In this embodiment, the following steps are performed: one collecting mirror 400 corresponds to a group of light holes (defined herein as a group of light holes comprising a first light hole 131 and a second light hole 132 corresponding thereto) and one photovoltaic cell 500, for example, the arrangement realizes distributed power generation and centralized heat collection, that is, light converged by each collecting mirror 400 passes through the light hole matched therewith and then enters the corresponding photovoltaic cell 500 through the heat collecting tube 100, and then the distributed power generation is realized, each photovoltaic cell 500 can be arranged in series or in parallel, the arrangement mode is flexible and versatile and has strong adaptability, and a plurality of collecting mirrors 400 can correspond to the same heat collecting tube 100, so that the centralized heat collection is realized, and high-quality high-temperature heat energy is easily generated. Compared with a conventional low-parameter high-concentration photovoltaic photo-thermal integrated system, the system exergy has the advantage that the efficiency can be improved by more than 10%.
It should be noted that, besides the above specific examples, other matching manners may be adopted, for example, a plurality of collecting mirrors 400 correspond to the same group of light holes, a plurality of groups of light holes correspond to the same photovoltaic cell 500, and the like, which is not limited herein. When a plurality of groups of light holes correspond to the same photovoltaic cell 500, more light rays which enable the photovoltaic cell 500 to generate the photoelectric effect can be obtained from the same photovoltaic cell 500, so that the photoelectric conversion rate can be improved, the power generation efficiency can be improved, and the manufacturing cost of the photovoltaic cell 500 can be reduced.
In the embodiment of the invention, the light gathering reflector mainly comprises a butterfly light gathering reflector with light gathering performance, or mainly comprises a multiple reflection coupling transmission system, or mainly comprises a butterfly light gathering reflector and a multiple reflection coupling transmission system, and the specific limitation is not limited, and the light gathering reflector is within the scope of the invention claimed. For example, the light gathering reflector may be a hyperbolic trough, a hyperbolic dish, a reflective focusing device or a combined system. In addition, the condenser lens 400 may also be a transmissive focusing system with condensing capability, such as a fresnel lens and any other type of transmissive focusing device or combination system.
In the embodiment of the present invention, the photovoltaic cogeneration system further includes an altitude tracking system for tracking the altitude of the sun and an altitude adjusting module for adjusting the altitude of the photovoltaic cogeneration system so that the solar rays are vertically incident on the photovoltaic cell 500 as much as possible to ensure the power generation efficiency of the photovoltaic cell 500.
In the embodiment of the present invention, the solar photovoltaic cogeneration system further includes an azimuth tracking system for tracking the azimuth of the sun and an azimuth adjusting module for adjusting the azimuth of the photovoltaic cogeneration system, so that the solar light is vertically incident on the photovoltaic cell 500 as much as possible to ensure the power generation efficiency of the photovoltaic cell 500. Specifically, in the embodiment of the present invention, as shown in fig. 4, the azimuth angle adjusting assembly includes an arc-shaped guide rail 700, and the photovoltaic cogeneration system can move along the arc-shaped guide rail 700 in the process of adjusting the azimuth angle.
In the embodiment of the present invention, when the photovoltaic cogeneration system simultaneously includes: when the elevation angle tracking system, the elevation angle adjusting component, the azimuth angle tracking system and the azimuth angle adjusting component are used, the dual-axis tracking can be realized, for example, each point focusing reflector is provided with independent elevation angle tracking equipment and elevation angle adjusting equipment, but is provided with common azimuth angle tracking equipment and azimuth angle adjusting equipment; of course, the embodiment of the present invention is not limited to this arrangement, and for example, each point focusing mirror may have the common altitude tracking device and altitude adjusting device.
In the embodiment of the present invention, as shown in fig. 1, a heat exchange cooler 600 is disposed on the back side of the photovoltaic cell 500, and the heat exchange cooler 600 is used for cooling the photovoltaic cell 500. Specifically, the heat exchanging cooler 600 may be a tube bundle type, a fin type, a printed circuit board type, or the like. The setting of setting up 600 of heat transfer cooler can effectively reduce photovoltaic cell temperature, and then improves photovoltaic cell's generating efficiency, prolongs photovoltaic cell's life-span.
In summary, the light-splitting heat-absorbing and collecting component and the photovoltaic combined heat and power system provided by the embodiments of the present invention utilize a light-splitting spectrum technology and adopt a series point focusing system to perform distributed power generation and centralized heat collection, and the system has the advantages that:
the absorption type spectrum technology is adopted, so that the independent operation of heat energy and electric energy is realized, the problems of efficiency reduction and damage caused by heating the photovoltaic component by non-response wave band light are solved, and the problem that heat collection parameters are difficult to improve due to the limitation of the temperature of the component is also solved;
secondly, the design of point focusing series connection is adopted, so that the equipment investment of a tracking system is reduced, the tracking system of a multipoint focusing reflection system can be shared, meanwhile, a heat collecting system pipeline can adopt connecting pipes for concentrated heat collection, as shown in fig. 4, the heat of each heat collecting pipe 100 can be gathered into a heat collecting main pipe 160, the whole heat collecting system has a high-parameter heat collecting function, and the investment of the heat collecting system is reduced;
and thirdly, by utilizing a point focusing heating mode, the non-heat-collecting section can be insulated by adopting an insulating layer 130, so that the heat dissipation loss of the whole photovoltaic power generation system is greatly reduced.
The electric energy storage system provided by the embodiment of the invention comprises the photovoltaic combined heat and power system, a plurality of storage battery packs, an electric quantity monitoring assembly, a heating assembly and a power supply change-over switch, wherein the storage battery packs are used for storing electric energy generated by the photovoltaic power system, the electric quantity monitoring assembly is used for monitoring the electric quantity of the storage battery packs, the heating assembly is used for heating the heat collecting pipes 100, and the power supply change-over switch is used for changing over the power supply direction; when the electric quantity monitoring assembly monitors the full electric quantity of the storage battery pack, the power supply direction is switched to the heating assembly or the commercial power grid through the power supply change-over switch.
The power generation and storage system provided by the embodiment of the invention comprises the photovoltaic cogeneration system, so that the power generation and storage system has all the advantages of the photovoltaic cogeneration system, namely: high-temperature heat energy with higher heat energy quality can be generated, the comprehensive utilization rate of light energy is greatly improved, and details are not repeated; in addition, when the storage battery pack is fully charged, the electric energy generated by the photovoltaic power generation system is stored in the storage battery pack, and when the storage battery pack is fully charged, the power supply direction is switched to the heating assembly through the power supply change-over switch, so that the heating assembly is in butt joint with the heat pipe for heating, or the power supply direction is switched to the municipal power grid, and therefore the natural solar energy is fully utilized, and the electric energy utilization rate is improved.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the above embodiments, the descriptions of the orientations such as "left", "right", and the like are based on the drawings.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The light-splitting absorption heat collection assembly is applied to a photovoltaic power generation system and comprises a heat collection tube (100) and a light concentrator (200);
the heat collecting tube (100) comprises a first tube (110), the first tube (110) is used for circulating a spectrum heat conducting fluid medium (120), and the first tube (110) is provided with a first light-transmitting part and a second light-transmitting part which can transmit light; the first tube (110) is externally provided with an insulating layer (130), the insulating layer (130) is provided with a first light transmission hole (131) and a second light transmission hole (132), the first light transmission hole (131) is arranged at the first light transmission part, and the second light transmission hole (132) is arranged at the second light transmission part;
the light collector (200) is arranged in the first light-transmitting hole (131) and is provided with a light collecting cavity for collecting light;
the light converged by the light collection cavity sequentially passes through the first light transmission hole (131) and the first light transmission part, enters the first tube (110), is absorbed by the spectrum heat conduction fluid medium (120), and the unabsorbed light sequentially passes through the second light transmission part and the second light transmission hole (132) and is emitted out of the heat collection tube (100).
2. A spectral absorption and collection thermal assembly according to claim 1, wherein the thermal collection tube (100) further comprises a second tube (140) sleeved outside the first tube (110), the second tube (140) is transparent to light, and a gap between the first tube (110) and the second tube (140) is a vacuum layer (150); the insulating layer (130) is sleeved outside the second pipe (140).
3. A spectral absorption heat-collecting assembly according to claim 2, wherein the second tube (140) is a quartz glass tube;
and/or the first light-transmitting hole (131) is provided with a plurality, and the corresponding second light-transmitting hole (132) and the light concentrator (200) are provided with a plurality;
and/or the first tube (110) is a light-transmitting tube which can transmit light on the whole.
4. A spectral absorption heat collecting assembly according to any one of claims 1-3, further comprising a light rectifier (300) for rectifying light emitted from said second light transmitting hole (132) into a light beam suitable for photovoltaic cell power generation.
5. A combined photovoltaic and thermal power generation system, characterized by comprising a condenser (400), a photovoltaic cell (500) and the spectral absorption heat collecting assembly of any one of claims 1 to 4, wherein light collected by the condenser (400) is incident into the first tube (110) of the heat collecting tube (100) through the light collecting cavity of the light collector (200), part of the light is absorbed by the spectral heat transfer fluid medium (120) in the first tube (110), and unabsorbed light is emitted out of the heat collecting tube (100) and then incident into the photovoltaic cell (500) to generate electricity.
6. The photovoltaic cogeneration system according to claim 5, wherein said condenser (400) is a plurality of condenser mirrors, each of said condenser mirrors (400) being capable of focusing a point of light;
and/or the photovoltaic cell (500) has a plurality.
7. The photovoltaic cogeneration system of claim 6, wherein said concentrating mirror consists essentially of a butterfly concentrating mirror and/or a multiple reflection coupled transmission system having concentrating properties.
8. The photovoltaic cogeneration system according to any one of claims 5 to 7, further comprising:
the solar photovoltaic combined heat and power generation system comprises an altitude tracking system and an altitude adjusting assembly, wherein the altitude tracking system is used for tracking the altitude of the sun, and the altitude adjusting assembly is used for adjusting the altitude of the photovoltaic combined heat and power system;
and/or the azimuth tracking system is used for tracking the azimuth of the sun, and the azimuth adjusting assembly is used for adjusting the azimuth of the photovoltaic cogeneration system.
9. The pv cogeneration system of claim 8, wherein said azimuth angle adjustment assembly comprises an arcuate guide along which said pv cogeneration system can move during azimuth angle adjustment (700);
and/or, the back of photovoltaic cell is provided with heat transfer cooler (600), heat transfer cooler (600) are used for right photovoltaic cell (500) cools down.
10. An electrical energy storage system comprising the photovoltaic cogeneration system of any one of claims 5-9;
the photovoltaic power generation system is characterized by further comprising a plurality of storage battery packs, an electric quantity monitoring assembly, a heating assembly and a power supply changeover switch, wherein the storage battery packs are used for storing electric energy generated by the photovoltaic power generation system, the electric quantity monitoring assembly is used for monitoring the electric quantity of the storage battery packs, the heating assembly is used for heating the heat collecting pipes (100), and the power supply changeover switch is used for switching the power supply direction;
when the electric quantity monitoring assembly monitors the full electric quantity of the storage battery pack, the power supply direction is switched to the heating assembly or the commercial power grid through the power supply change-over switch.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210490972.8A CN114593529A (en) | 2022-05-07 | 2022-05-07 | Light-splitting absorption heat collection assembly, photovoltaic cogeneration system and electric energy storage system |
| PCT/CN2022/142737 WO2023216617A1 (en) | 2022-05-07 | 2022-12-28 | Light splitting, absorbing and heat collecting assembly, photovoltaic combined heat and power supply system, and electric energy storage system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210490972.8A CN114593529A (en) | 2022-05-07 | 2022-05-07 | Light-splitting absorption heat collection assembly, photovoltaic cogeneration system and electric energy storage system |
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| CN114593529A true CN114593529A (en) | 2022-06-07 |
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| CN202210490972.8A Pending CN114593529A (en) | 2022-05-07 | 2022-05-07 | Light-splitting absorption heat collection assembly, photovoltaic cogeneration system and electric energy storage system |
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| WO (1) | WO2023216617A1 (en) |
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| WO2023216617A1 (en) * | 2022-05-07 | 2023-11-16 | 西安热工研究院有限公司 | Light splitting, absorbing and heat collecting assembly, photovoltaic combined heat and power supply system, and electric energy storage system |
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| CN114593529A (en) * | 2022-05-07 | 2022-06-07 | 西安热工研究院有限公司 | Light-splitting absorption heat collection assembly, photovoltaic cogeneration system and electric energy storage system |
| CN114584065B (en) * | 2022-05-07 | 2022-10-14 | 西安热工研究院有限公司 | Photovoltaic power generation system and electric energy storage system |
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| CN204063622U (en) * | 2014-07-31 | 2014-12-31 | 陈兴邦 | Solar energy frequency division Accumulated Heat Units and there is its solar power system |
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| CN107940775A (en) * | 2017-11-15 | 2018-04-20 | 韦治东 | The processing method of solar energy heat collection pipe |
| DE102018106304A1 (en) * | 2018-03-19 | 2019-09-19 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | DC charging of a smart battery |
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| WO2023216617A1 (en) * | 2022-05-07 | 2023-11-16 | 西安热工研究院有限公司 | Light splitting, absorbing and heat collecting assembly, photovoltaic combined heat and power supply system, and electric energy storage system |
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| WO2023216617A1 (en) | 2023-11-16 |
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