CN211648374U - Photovoltaic, heat storage and photo-thermal combined solar power generation system - Google Patents
Photovoltaic, heat storage and photo-thermal combined solar power generation system Download PDFInfo
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- CN211648374U CN211648374U CN202020223088.4U CN202020223088U CN211648374U CN 211648374 U CN211648374 U CN 211648374U CN 202020223088 U CN202020223088 U CN 202020223088U CN 211648374 U CN211648374 U CN 211648374U
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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
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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
- Y02E10/60—Thermal-PV hybrids
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Abstract
A photovoltaic and heat storage device is provided, solar energy power generation system is united to light and heat, including the solar photovoltaic board, the liquid cooler of solar photovoltaic board is connected with solar collector, solar collector is connected with valve b, valve b is connected with energy storage system, energy storage system is connected with valve c, valve c is connected with the reservoir, the export of reservoir divide into two the tunnel, be connected with valve a's import all the way, valve a's export is connected with the liquid cooler import of solar photovoltaic board, another way is connected with valve d's import, valve d's export is connected with energy storage system, energy storage system is connected with valve e's import, valve e's export is connected with free piston linear generator's import, free piston linear generator's export is connected with the import of condenser, the export of condenser is connected with the import of reservoir after meeting with valve c's export. The utility model discloses not only improve the efficiency of solar photovoltaic board, also can realize generating electricity in succession.
Description
Technical Field
The utility model relates to a power generation system technical field, in particular to solar power system is united to photovoltaic, heat-retaining, light and heat.
Background
Solar energy is an inexhaustible clean energy, and in the current stage, the technology of solar photovoltaic is relatively mature, the application is photovoltaic, but the energy storage is difficult to solve. In addition, although the theoretical efficiency of photovoltaic power generation is high, the efficiency of the solar photovoltaic panel linearly decreases with an increase in temperature, and therefore the solar photovoltaic panel must be cooled. Meanwhile, as the theoretical thermal efficiency of the solar photo-thermal power generation is high during high-temperature heat collection, and the problem of uneven solar time distribution can be solved by using cheaper heat storage and energy storage in theory, the photo-thermal power generation is also increasingly emphasized.
However, solar thermal power generation has the difficulties that the cost is too high and the popularization is difficult, the energy density of solar energy is relatively dispersed, and the conventional power generation device is suitable for being applied to occasions with relatively high energy density, such as fossil energy power generation, nuclear power generation and the like. In the case of low energy density, such as solar power generation, it is necessary to collect the heat of the focused solar energy, so called a focused heat collector. The focusing heat collector of the present invention is broadly classified into a tracking type, a non-tracking type, a focusing type, a non-focusing type, and the like. The tracking type is that the heat collector needs to change according to the position angle of the sun relative to the ground at different moments every day, and then the light rotates, so that the efficiency of the heat collector is high, but a tracking system is required to be equipped, and the tracking system comprises a speed reduction motor, a traditional mechanism and the like, so that the cost is increased. The non-focusing type does not need to rotate, the design of the shape of the condensing lens body ensures that the sun can focus light rays to the heat absorber at different angles, and the defects are low condensing efficiency and low heat collecting temperature. The focusing heat collector adopts a lens or a reflector to collect the sunlight on a certain projection area to one point or one line, has the advantages of high heat collection temperature, needs to manufacture the reflector or the lens with a point geometric profile requirement, increases certain cost, and has the cost related to the mirror surface requirement. The Fischer-Tropsch type heat collector, such as a flat plate heat collector, simply depends on solar energy to radiate and heat working media on the front side, so that the manufacture is simple, but the heat collection temperature is lower.
Disclosure of Invention
In order to overcome the not enough of above-mentioned prior art, the utility model aims to provide a photovoltaic, the heat-retaining, solar energy power generation system is united to light and heat, the working medium that adopts light and heat electricity generation at first cools off the solar photovoltaic board when low temperature, then preheat the working medium, and store the heat of collection, it is not enough to generate electricity at solar photovoltaic, adopt light and heat electricity generation to supply, the efficiency of solar photovoltaic board has not only been improved like this, the difficult problem of solar photovoltaic electricity generation energy storage has also been solved, can realize continuous electricity generation.
In order to realize the purpose, the utility model discloses a technical scheme is:
a photovoltaic, heat storage and photo-thermal combined solar power generation system comprises a solar photovoltaic panel 1, wherein an outlet of a liquid cooler of the solar photovoltaic panel 1 is connected with an inlet of a working medium side of a solar heat collector 2, an outlet of the working medium side of the solar heat collector 2 is connected with an inlet of a valve b, an outlet of the valve b is connected with an inlet of a high temperature side of an energy storage system 3, an outlet of the low temperature side of the energy storage system 3 is connected with an inlet of a valve c, an outlet of the valve c is connected with an inlet of a liquid storage device 4, an outlet of the liquid storage device 4 is divided into two paths, one path is connected with an inlet of a valve a, an outlet of the valve a is connected with an inlet of the liquid cooler of the solar photovoltaic panel 1, the other path is connected with an inlet of a valve d, an outlet of the valve d is connected with an inlet of, the outlet of the valve e is connected with the inlet of the free piston linear generator 5, the outlet of the free piston linear generator 5 is connected with the inlet of the condenser 6, and the outlet of the condenser 6 is connected with the inlet of the liquid storage device 4 after meeting with the outlet of the valve c.
The solar photovoltaic panel 1 is cooled by liquid.
The solar heat collector 2 adopts a medium-low temperature solar heat collector, and adopts a trough type heat collector.
The energy storage system 4 can select different numbers of energy storage units according to different power generation capacities of the system, the melting point of the energy storage material is close to the heat collection temperature of solar energy, the energy storage material is lower than the heat collection temperature, latent heat is used for storing energy, and the energy storage material is packaged in the energy storage units and does not flow.
A photovoltaic, heat storage and photo-thermal combined solar power generation method comprises the following steps;
the solar photovoltaic system is characterized in that the valves a, b and c are opened and the valves e, d and f are closed when sunlight is sufficient in daytime, the system mainly uses solar photovoltaic power generation in daytime, a working medium cools the solar photovoltaic panel 1 through a cooler of the solar photovoltaic panel 1, then enters the solar thermal collector 2 to be further heated to a designed temperature, then enters the energy storage system 3 through the valve b to release heat, then enters the liquid storage device 4 through the valve c, and then enters the cooler of the solar photovoltaic panel 1 through the valve a to be cooled, so that the whole cycle is completed, and the cycle working medium only plays a role of cooling and stores heat;
in the daytime, when sunlight exists but the sunlight is insufficient, and the energy storage system 3 stores required heat, valves a, b, d and e are opened, and a valve c is closed, under the working condition, working media coming out of the liquid storage device 4 are divided into two parts, one part of the working media enters the cooler of the solar photovoltaic panel 1 through the valve a, enters the solar thermal collector 2 after cooling the solar photovoltaic panel, enters the free piston linear generator 5 through the valve b and the valve e to do work after being heated to the design temperature, the other part of the working media enters the energy storage system 3 through the valve d to absorb heat, the heated working media and the working media heated from the solar thermal collector 2 are converged and then enter the free piston linear generator 5 through the valve e to do work, then are cooled into liquid in the condenser 6, and finally enter the liquid storage device 4 to complete circulation;
when no sunlight exists, the energy storage system 3 stores needed heat, meanwhile, the valves d and e are opened and the valves a, b and c are closed when electric energy needs to be output, working medium in the liquid storage device 4 enters the energy storage system 3 through the valve b to absorb the heat, then enters the free piston linear generator 5 through the valve e to do work, is cooled into liquid in the condenser 6, and finally flows into the liquid storage device 4 to finish circulation.
The utility model has the advantages that:
a photovoltaic, heat-retaining, solar energy power generation system is united to light and heat combines solar photovoltaic and light and heat electricity generation, adopt light and heat electricity generation's working medium at first to cool off the solar photovoltaic board when low temperature, then preheat the working medium to store the heat of collection, it is not enough to generate electricity at solar photovoltaic, adopt light and heat electricity generation to supply, so not only improved the efficiency of solar photovoltaic board, also solved the difficult problem of solar photovoltaic electricity generation energy storage, can realize continuous electricity generation.
And because of adopting the cheaper free piston linear generator system, the motion frequency and speed are lower, the difficulty of the shaft seal is greatly reduced, and the cheaper shaft seal form, such as graphite, can be adopted, so that the cost is greatly reduced.
Meanwhile, the pressure difference required by the power generation system is small, so that the pressure of the whole system can be low, the pressure grade of the system can be reduced, the adoption of cheaper materials and a processing and manufacturing process can be facilitated, and the cost of the system can be further reduced.
And simultaneously, because the utility model discloses a solar collector temperature requirement is not high (can generate electricity about 100 ℃), and solar collector also adopts non-tracking type heat collector, has saved complicated tracking mechanism, further reduce cost. The non-tracking heat collector has many kinds, such as CPC type, V type and many profiles with novel structure, as long as the line focus, and the heat collector can be used without affecting the arrangement.
Drawings
Fig. 1 is a schematic view of a photovoltaic, thermal storage and photothermal combined solar power generation system.
In the figure: the solar photovoltaic panel comprises a solar photovoltaic panel 1, a solar thermal collector 2, an energy storage system 3, a liquid storage device 4, a free piston linear generator 5 and a condenser 6.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A photovoltaic, heat storage and photo-thermal combined solar power generation system comprises a solar photovoltaic panel 1, wherein an outlet of a liquid cooler of the solar photovoltaic panel 1 is connected with an inlet of a working medium side of a solar heat collector 2, an outlet of the working medium side of the solar heat collector 2 is connected with an inlet of a valve b, an outlet of the valve b is connected with an inlet of a high temperature side of an energy storage system 3, an outlet of the low temperature side of the energy storage system 3 is connected with an inlet of a valve c, an outlet of the valve c is connected with an inlet of a liquid storage device 4, an outlet of the liquid storage device 4 is divided into two paths, one path is connected with an inlet of a valve a, an outlet of the valve a is connected with an inlet of the liquid cooler of the solar photovoltaic panel 1, the other path is connected with an inlet of a valve d, an outlet of the valve d is connected with an inlet of, the outlet of the valve e is connected with the inlet of the free piston linear generator 5, the outlet of the free piston linear generator 5 is connected with the inlet of the condenser 6, and the outlet of the condenser 6 is connected with the inlet of the liquid storage device 4 after meeting with the outlet of the valve c.
The solar photovoltaic panel 1 is cooled by liquid, cooling liquid absorbs heat in the solar photovoltaic panel 1, is preheated, then enters the solar thermal collector 2 to be continuously heated to a designed temperature, then enters the energy storage system to release heat, is cooled into liquid after releasing heat, returns to the liquid reservoir, and then enters the cooler of the solar photovoltaic panel 1 again to be cooled;
the solar heat collector 2 can be a medium-low temperature solar heat collector, and can be a trough type heat collector, but is not limited to the trough type heat collector.
The energy storage system 3 can select different amounts of energy storage units according to different power generation capacities of the system, the energy storage material selects energy storage materials (such as organic materials like paraffin and the like) with melting points close to the heat collection temperature of solar energy and lower than the heat collection temperature, latent heat energy storage is adopted, and the energy storage materials are packaged in the energy storage units and do not flow;
the linear generator is almost a generator form which is simultaneous with the rotary generator, and only the rotary generator is more suitable under the condition of high-speed movement, and then the linear generator is only adopted under special conditions. The linear generator can keep higher efficiency under the relatively lower frequency movement condition, which cannot be realized by a rotary generator, and meanwhile, after the piston expansion-linear generator system is provided with acting parts such as a spring, a piston and the like, the piston expansion-linear generator system can generate electricity by utilizing airflow with very low pressure difference and very low temperature difference, which cannot be realized by a common turbine and a common generator. And such piston expansion-linear generator systems have been widely researched and applied. The characteristics of the piston expansion-linear generator system bring new opportunity for low-temperature waste heat power generation.
This application combines solar photovoltaic and light and heat power generation, and the working medium that adopts light and heat power generation at first cools off the solar photovoltaic board when low temperature, then preheats the working medium to the heat of collecting is stored, when solar photovoltaic power generation is not enough, adopts light and heat power generation to supply, has so not only improved the efficiency of solar photovoltaic board, has also solved the problem of solar photovoltaic power generation energy storage difficulty, can realize generating electricity in succession.
A photovoltaic, heat storage and photo-thermal combined solar power generation method comprises the following steps;
the solar photovoltaic system is characterized in that the valves a, b and c are opened and the valves e, d and f are closed when sunlight is sufficient in daytime, the system mainly uses solar photovoltaic power generation in daytime, a working medium cools the solar photovoltaic panel 1 through a cooler of the solar photovoltaic panel 1, then enters the solar thermal collector 2 to be further heated to a designed temperature, then enters the energy storage system 3 through the valve b to release heat, then enters the liquid storage device 4 through the valve c, and then enters the cooler of the solar photovoltaic panel 1 through the valve a to be cooled, so that the whole cycle is completed, and the cycle working medium only plays a role of cooling and stores heat;
in the daytime, when sunlight exists but the sunlight is insufficient, and the energy storage system 3 stores required heat, valves a, b, d and e are opened, and a valve c is closed, under the working condition, working media coming out of the liquid storage device 4 are divided into two parts, one part of the working media enters the cooler of the solar photovoltaic panel 1 through the valve a, enters the solar thermal collector 2 after cooling the solar photovoltaic panel, enters the free piston linear generator 5 through the valve b and the valve e to do work after being heated to the design temperature, the other part of the working media enters the energy storage system 3 through the valve d to absorb heat, the heated working media and the working media heated from the solar thermal collector 2 are converged and then enter the free piston linear generator 5 through the valve e to do work, then are cooled into liquid in the condenser 6, and finally enter the liquid storage device 4 to complete circulation;
when no sunlight exists, the energy storage system 3 stores needed heat, meanwhile, the valves d and e are opened and the valves a, b and c are closed when electric energy needs to be output, working medium in the liquid storage device 4 enters the energy storage system 3 through the valve b to absorb the heat, then enters the free piston linear generator 5 through the valve e to do work, is cooled into liquid in the condenser 6, and finally flows into the liquid storage device 4 to finish circulation.
Claims (4)
1. A photovoltaic, heat storage and photo-thermal combined solar power generation system is characterized by comprising a solar photovoltaic panel (1), wherein the outlet of a liquid cooler of the solar photovoltaic panel (1) is connected with the working medium side inlet of a solar heat collector (2), the working medium side outlet of the solar heat collector (2) is connected with the inlet of a valve b, the outlet of the valve b is connected with the high-temperature side inlet of an energy storage system (3), the low-temperature side outlet of the energy storage system (3) is connected with the inlet of a valve c, the outlet of the valve c is connected with the inlet of a liquid storage device (4), the outlet of the liquid storage device (4) is divided into two paths, one path is connected with the inlet of a valve a, the outlet of the valve a is connected with the liquid cooler inlet of the solar photovoltaic panel (1), the other path is connected with the inlet of a valve d, the outlet of the valve d is connected with the low-temperature, an outlet of the high-temperature side of the energy storage system (3) is connected with an inlet of a valve e, an outlet of the valve e is connected with an inlet of a free piston linear generator (5), an outlet of the free piston linear generator (5) is connected with an inlet of a condenser (6), and an outlet of the condenser (6) is connected with an inlet of a liquid storage device (4) after meeting with an outlet of a valve c.
2. A photovoltaic, thermal storage and photothermal combined solar power system according to claim 1, wherein said solar photovoltaic panel (1) is liquid cooled.
3. The photovoltaic, thermal storage and photothermal combined solar power generation system according to claim 1, wherein the solar heat collector (2) is a medium-low temperature solar heat collector in the form of a trough collector.
4. The photovoltaic, thermal storage and photothermal combined solar power generation system according to claim 1, wherein the energy storage system (3) can select different numbers of energy storage units according to different power generation capacities of the system, the energy storage material selects the energy storage material with melting point close to the solar heat collection temperature and lower than the heat collection temperature, latent heat energy is adopted for energy storage, and the energy storage material is packaged in the energy storage units and does not flow.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020223088.4U CN211648374U (en) | 2020-02-28 | 2020-02-28 | Photovoltaic, heat storage and photo-thermal combined solar power generation system |
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| CN202020223088.4U CN211648374U (en) | 2020-02-28 | 2020-02-28 | Photovoltaic, heat storage and photo-thermal combined solar power generation system |
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| CN211648374U true CN211648374U (en) | 2020-10-09 |
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| CN202020223088.4U Active CN211648374U (en) | 2020-02-28 | 2020-02-28 | Photovoltaic, heat storage and photo-thermal combined solar power generation system |
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