CN112737079A - Photovoltaic and semiconductor temperature difference combined power generation system - Google Patents
Photovoltaic and semiconductor temperature difference combined power generation systemDownload PDFInfo
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- CN112737079A CN112737079ACN202011599322.4ACN202011599322ACN112737079ACN 112737079 ACN112737079 ACN 112737079ACN 202011599322 ACN202011599322 ACN 202011599322ACN 112737079 ACN112737079 ACN 112737079A
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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
- 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
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
- 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
- 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
- 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
- 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
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
Translated fromChinese
Description
Technical Field
The invention belongs to the technical field of solar photovoltaic high-efficiency power generation and semiconductor temperature difference power generation, and particularly relates to a photovoltaic and semiconductor temperature difference combined power generation system.
Background
In solar photovoltaic power generation, about 30% of radiant heat of sunlight can be converted into electric power through a photovoltaic effect, the rest about 70% of heat energy is not fully utilized, and meanwhile, the temperature of a solar photovoltaic panel substrate is increased due to the heat. Under the condition of certain illumination intensity, when the output voltage of the solar photovoltaic cell is reduced along with the temperature rise, the output power is also reduced, and the power generation efficiency is reduced by about 0.3 percent when the temperature rises by 1 ℃. Under the high temperature state, still cause the panel facula corrosion of photovoltaic board, the ageing fracture of viscose, life reduction scheduling problem easily.
The photovoltaic panel substrate is cooled by a natural cooling mode with the environment in a light aluminum-plastic substrate, high-heat-conducting-performance adhesive glue and other modes. However, the design can not ensure that the temperature of the substrate is in a reasonable range under strong irradiation conditions such as desert and ocean, and the temperature of the photovoltaic panel is high due to high environmental temperature in summer, so that the power generation efficiency is reduced, and the service life of the solar photovoltaic panel is shortened.
Disclosure of Invention
The invention aims to solve the key problems that the solar photovoltaic panel substrate is over-temperature and the like which affect the photovoltaic power generation efficiency and the service life and the problem that the waste heat utilization level of the solar photovoltaic panel substrate is low, and realize the intelligent control of the solar photovoltaic panel at the optimal power generation efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
the photovoltaic and semiconductor temperature difference combined power generation system comprises a solar photovoltaic panel, a solar photovoltaic output switch, a solar photovoltaic controller, a solar photovoltaic storage battery pack, a solar photovoltaic inverter, a heat pipe, a thermoelectric generator, a high-temperature side of the thermoelectric generator, a low-temperature side of the thermoelectric generator, a liquid supplementing door, a cooler, an internal resistance of the thermoelectric generator, an output switch of the thermoelectric generator, a controller of the thermoelectric generator, a storage battery pack of the thermoelectric generator and an inverter of the thermoelectric generator;
the solar photovoltaic panel is connected with a solar photovoltaic controller through a solar photovoltaic output switch, and the solar photovoltaic controller is respectively connected with a solar photovoltaic storage battery pack and a solar photovoltaic inverter; the solar photovoltaic panel is provided with a plurality of heat pipes which are uniformly distributed, and the heat pipes are arranged on the solar photovoltaic panel through the adhesive film;
the outlet of the high-temperature side of the thermoelectric generator is connected with an inlet pipeline of the cooler, the outlet of the cooler is connected with an inlet pipeline of the low-temperature side of the thermoelectric generator, the cooler is further provided with a liquid supplementing door for supplementing a prepared flowing working medium, the outlet of the low-temperature side of the thermoelectric generator is connected with a cold end pipeline of a heat pipe, the hot end of the heat pipe is directly contacted with a pump and used for providing a heat source for a flowing medium in the pump, the pump is connected with the inlet pipeline of the high-temperature side of the thermoelectric generator, the thermoelectric generator is connected with a thermoelectric generator controller through an internal resistance of the thermoelectric generator and an output switch of the thermoelectric generator, and the thermoelectric generator controller is respectively connected with a storage battery pack of the thermoelectric generator and an inverter of the thermoelectric generator.
Further, the system further comprises a solar photovoltaic panel substrate temperature measuring element, the solar photovoltaic panel substrate temperature measuring element is arranged on the solar photovoltaic panel and is connected with the thermoelectric generator controller, and the thermoelectric generator controller is connected with the pump.
The solar photovoltaic power generation efficiency is a main technical index of investment operation, the variable frequency operation of the pump is controlled by the thermoelectric generator controller through the combination of a substrate temperature measuring element signal and the pump of the solar photovoltaic panel based on a substrate temperature measuring point signal, the fluid medium flows at an accelerated speed to cool the photovoltaic panel, the optimal efficiency of the solar photovoltaic panel is adjusted, the photovoltaic power generation of the solar photovoltaic panel is realized near the optimal efficiency value, and the technical economy of the solar photovoltaic power generation is improved.
Furthermore, the system also comprises a vertical cooling air pipe and a cooling fan, wherein the air outlet of the cooling fan is provided with the vertical cooling air pipe, the cooler is arranged in the vertical cooling air pipe, and the thermoelectric generator controller is connected with the cooling fan.
The solar photovoltaic panel substrate temperature measuring element signal and the thermoelectric generator controller are used for carrying out variable frequency control on the pump and the cooling fan to obtain a large temperature difference between high temperature and low temperature, so that the semiconductor thermoelectric generation is carried out at the position near the optimal efficiency value, wherein the variable frequency control on the pump is realized through the thermoelectric generator controller, the heat source temperature of the high temperature side can be improved, and meanwhile, the variable frequency control is carried out on the cooling fan to realize the reduction of the cold source temperature.
Further, the solar photovoltaic storage battery pack is connected with the solar photovoltaic inverter and used for improving the power output of the corresponding voltage specification according to the requirement of a user; the thermoelectric generator storage battery is connected with the thermoelectric generator inverter and used for improving the power output of the corresponding voltage specification according to the needs of users.
Further, the flowing working medium is slightly supersaturated saline water. The solar photovoltaic panel heat conduction cooling effect is achieved by adjusting the concentration of the saline water along with the ambient temperature, the concentration is automatically adjusted after the saline water is cooled in a cooler in the vertical cooling air pipe, and the purposes of safe operation, easy maintenance and liquid supplement, cost reduction and the like are achieved by adopting the configured micro-supersaturated saline water.
Further, the pad pasting is graphite pad pasting or graphite alkene pad pasting, when reinforcing heat transfer effect and cost are not the main consideration option, can adopt graphite alkene to do the filler, and this process makes photovoltaic panel's heat can distribute evenly to and can heat conduction fast, improve heat exchange efficiency.
Compared with the prior art, the invention has the following advantages:
the photovoltaic power generation system, the semiconductor temperature difference power generation system, the solar photovoltaic panel cooling and heat taking system and the regulation and control system are technically coupled, so that a proper temperature condition is provided for the optimal power generation efficiency of the solar photovoltaic, meanwhile, the regulation and control system is used for realizing the better power generation efficiency of the semiconductor temperature difference power generation on the basis of ensuring the optimal efficiency of the solar photovoltaic, and the electric energy output is improved.
The invention synergistically improves the photovoltaic power generation efficiency of solar energy and the service life thereof, improves the power generation efficiency of semiconductor thermoelectric power generation, and has advanced technical advantages.
Drawings
FIG. 1 is a photovoltaic and semiconductor thermoelectric combined power generation system;
the system comprises a solarphotovoltaic panel 1, a solar photovoltaic output switch 2, a solarphotovoltaic controller 3, a solar photovoltaic storage battery pack 4, a solar photovoltaic inverter 5, aheat pipe 6, a pump 7, athermoelectric generator 8, a high-temperature side 8-1 of the thermoelectric generator, a low-temperature side 8-2 of the thermoelectric generator, a liquid supplementingdoor 9, acooler 10, a verticalcooling air pipe 11, acooling fan 12, aninternal resistance 13 of the thermoelectric generator, anoutput switch 14 of the thermoelectric generator, acontroller 15 of the thermoelectric generator, astorage battery pack 16 of the thermoelectric generator, aninverter 17 of the thermoelectric generator and a substratetemperature measuring element 18 of the solar photovoltaic panel.
Detailed Description
As shown in fig. 1, the photovoltaic and semiconductor thermoelectric combined power generation system comprises a solarphotovoltaic panel 1, a solar photovoltaic output switch 2, a solarphotovoltaic controller 3, a solar photovoltaic storage battery pack 4, a solar photovoltaic inverter 5, aheat pipe 6, a pump 7, athermoelectric generator 8, a high-temperature side 8-1 of the thermoelectric generator, a low-temperature side 8-2 of the thermoelectric generator, a liquid supplementingdoor 9, acooler 10, a verticalcooling air pipe 11, acooling fan 12, aninternal resistance 13 of the thermoelectric generator, anoutput switch 14 of the thermoelectric generator, acontroller 15 of the thermoelectric generator, astorage battery pack 16 of the thermoelectric generator, a thermoelectric generator-basedinverter 17 and a substratetemperature measuring element 18 of the solar photovoltaic panel;
the solarphotovoltaic panel 1 is connected with a solarphotovoltaic controller 3 through a solar photovoltaic output switch 2, and the solarphotovoltaic controller 3 is respectively connected with a solar photovoltaic battery pack 4 and a solar photovoltaic inverter 5; the solarphotovoltaic panel 1 is provided with a plurality ofheat pipes 6 which are uniformly distributed, and theheat pipes 6 are arranged on the solarphotovoltaic panel 1 through graphite films; an outlet of the high-temperature side 8-1 of the thermoelectric generator is connected with an inlet pipeline of acooler 10, an outlet of thecooler 10 is connected with an inlet pipeline of the low-temperature side 8-2 of the thermoelectric generator, thecooler 10 is further provided with a liquid supplementingdoor 9 for supplementing a configured flowing working medium, an outlet of the low-temperature side 8-2 of the thermoelectric generator is connected with a cold end pipeline of aheat pipe 6, a hot end of theheat pipe 6 is directly contacted with a pump 7 and used for providing a heat source for a flowing medium in the pump 7, an outlet of the pump 7 is connected with an inlet pipeline of the high-temperature side 8-1 of the thermoelectric generator, thethermoelectric generator 8 is connected with athermoelectric generator controller 15 through aninternal resistance 13 of the thermoelectric generator and anoutput switch 14 of the thermoelectric generator, and the thermoelectric generator controller is respectively connected with astorage battery pack 16 of the thermoelectric generator and aninverter 17 of the thermoelectric generator. The solar photovoltaic panel substratetemperature measuring element 18 is arranged on the solarphotovoltaic panel 1, the solar photovoltaic panel substratetemperature measuring element 18 is connected with thethermoelectric generator controller 15, and thethermoelectric generator controller 15 is connected with the pump 7. The air outlet of thecooling fan 12 is provided with a verticalcooling air pipe 11, thecooler 10 is arranged in the verticalcooling air pipe 11, and thethermoelectric generator controller 15 is connected with thecooling fan 12. The solar photovoltaic battery pack 4 is connected with the solar photovoltaic inverter 5 and is used for improving the power output of the corresponding voltage specification according to the requirement of a user; the thermoelectric generatorstorage battery pack 16 is connected with thethermoelectric generator inverter 17 and is used for improving the electric power output of the corresponding voltage specification according to the requirement of a user.
The working principle is as follows:
the photovoltaic power generation system is a basic power generation system, under the action of solar radiation, a battery in a solarphotovoltaic panel 1 generates a photovoltaic effect to form the flow of electron and hole pairs and generate photovoltaic voltage, the output and the energy storage of photovoltaic power are realized through a solar photovoltaic output switch 2, a solarphotovoltaic controller 3, a solar photovoltaic storage battery pack 4 and a solar photovoltaic inverter 5, and the power output of corresponding voltage specifications is improved according to the needs of users;
a semiconductor thermoelectric power generation system extracts heat of a solarphotovoltaic panel 1 through aheat pipe 6 and micro supersaturated brine to be cooled, the hot micro supersaturated brine is sent to a high-temperature side 8-1 of a thermoelectric generator through a pump 7, a heat source of the high-temperature side 8-1 of the thermoelectric generator comes from the solarphotovoltaic panel 1 and then flows out of acooler 10 in a verticalcooling air pipe 11, the configured micro supersaturated brine is supplemented through a liquid supplementingdoor 9 during maintenance or initial operation, the temperature is cooled under the double cooling action of natural cooling generated by pressure difference formed by forced cooling of acooling fan 12 and the verticalcooling air pipe 11, and then the cooled micro supersaturated brine flows into a low-temperature side 8-2 of thethermoelectric generator 8, so that temperature difference is generated on two sides of thethermoelectric generator 8, and theinternal resistance 13 of the thermoelectric generator, anoutput switch 14 of the thermoelectric generator, acontroller 15, astorage battery pack 16 of the thermoelectric generator are utilized, The connection of thethermoelectric generator inverter 17 realizes the power output and energy storage of semiconductor thermoelectric generation, and improves the power output of corresponding voltage specification according to the requirement of a user;
the solar photovoltaic panel cooling and heat taking system is characterized in that aheat pipe 6 is adhered to a solar photovoltaic panel substrate, the uniform distribution and the rapid heat conduction of the substrate temperature are realized by adopting a graphite film (such as 6-0 in figure 1), a plurality of groups of heat pipe cloth pieces (such as 6-1, 6-2, 6-3 and 6-4 in figure 1) can be carried out according to actual needs, and a pump 7 is subjected to frequency conversion control under the signal instruction of a solar photovoltaic panel substratetemperature measuring element 18, so that the cooling and heat taking of the solar photovoltaic panel are realized;
the control system controls the variable frequency operation of the pump 7 through thethermoelectric generator controller 15 according to a signal of the solar photovoltaic panel substratetemperature measuring element 18 to realize the temperature control of the photovoltaic panel, and controls the variable frequency operation of thecooling fan 12 through thethermoelectric generator controller 15 according to a temperature signal instruction to control the temperature of the solarphotovoltaic panel 1 in an optimal power generation efficiency range and control a larger temperature difference condition through semiconductor thermoelectric power generation to realize the operation of the semiconductor thermoelectric power generation in a better power generation efficiency range.
The flowing working media at the high-temperature side and the low-temperature side of the thermoelectric generator adopt slightly supersaturated saline, the heat conduction and cooling effects of the solar photovoltaic panel are realized by adjusting the concentration of the saline along with the ambient temperature, and the concentration is automatically adjusted after the cooling in thecooler 10 in the verticalcooling air pipe 11;
theheat pipe 6 is fixed on the bottom plate of the solarphotovoltaic panel 1, is fixed by adopting a graphite film, and can adopt graphene as a filler when the heat exchange effect and cost are not main consideration options.
The photovoltaic and semiconductor temperature difference combined power generation system improves the solar photovoltaic power generation efficiency influenced by temperature, prolongs the service life of a solar photovoltaic panel, realizes a combined power generation supply system, and has good technical economy.
Claims (6)
1. The photovoltaic and semiconductor temperature difference combined power generation system is characterized by comprising a solar photovoltaic panel (1), a solar photovoltaic output switch (2), a solar photovoltaic controller (3), a solar photovoltaic storage battery pack (4), a solar photovoltaic inverter (5), a heat pipe (6), a pump (7), a temperature difference generator (8), a high-temperature side (8-1) of the temperature difference generator, a low-temperature side (8-2) of the temperature difference generator, a liquid supplementing door (9), a cooler (10), an internal resistance (13) of the temperature difference generator, an output switch (14) of the temperature difference generator, a controller (15) of the temperature difference generator, a storage battery pack (16) of the temperature difference generator and an inverter (17) of the temperature difference generator;
the solar photovoltaic panel (1) is connected with a solar photovoltaic controller (3) through a solar photovoltaic output switch (2), and the solar photovoltaic controller (3) is respectively connected with a solar photovoltaic storage battery pack (4) and a solar photovoltaic inverter (5); the solar photovoltaic panel (1) is provided with a plurality of heat pipes (6) which are uniformly distributed, and the heat pipes (6) are arranged on the solar photovoltaic panel (1) through adhesive films;
an outlet of the high-temperature side (8-1) of the thermoelectric generator is connected with an inlet pipeline of a cooler (10), an outlet of the cooler (10) is connected with an inlet pipeline of the low-temperature side (8-2) of the thermoelectric generator, the cooler (10) is further provided with a liquid supplementing door (9) for supplementing configured flowing working media, an outlet of the low-temperature side (8-2) of the thermoelectric generator is connected with a cold-end pipeline of a heat pipe (6), a hot end of the heat pipe (6) is directly contacted with a pump (7) and used for providing a heat source for flowing media in the pump (7), an outlet of the pump (7) is connected with an inlet pipeline of the high-temperature side (8-1) of the thermoelectric generator, the thermoelectric generator (8) is connected with a thermoelectric generator controller (15) through an internal resistance (13) of the thermoelectric generator and an output switch (14) of the thermoelectric generator, and the thermoelectric generator controller is respectively connected with a thermoelectric generator storage battery pack (16) and a storage battery pack (16), The thermoelectric generator inverter (17) is connected.
2. The photovoltaic and semiconductor temperature difference combined power generation system according to claim 1, further comprising a solar photovoltaic panel substrate temperature measuring element (18), wherein the solar photovoltaic panel substrate temperature measuring element (18) is arranged on the solar photovoltaic panel (1), the solar photovoltaic panel substrate temperature measuring element (18) is connected with a thermoelectric generator controller (15), and the thermoelectric generator controller (15) is connected with the pump (7).
3. The photovoltaic and semiconductor temperature difference combined power generation system according to claim 2, further comprising a vertical cooling air pipe (11) and a cooling fan (12), wherein the air outlet of the cooling fan (12) is provided with the vertical cooling air pipe (11), the cooler (10) is built in the vertical cooling air pipe (11), and the thermoelectric generator controller (15) is connected with the cooling fan (12).
4. The photovoltaic and semiconductor temperature difference combined power generation system according to claim 1, wherein the solar photovoltaic battery pack (4) is connected with a solar photovoltaic inverter (5) and is used for increasing the power output of the corresponding voltage specification according to the needs of users; the thermoelectric generator storage battery pack (16) is connected with the thermoelectric generator inverter (17) and used for improving the power output of corresponding voltage specifications according to the needs of users.
5. The photovoltaic and semiconductor thermoelectric combined power generation system of claim 1, wherein the fluid working medium is a slightly supersaturated brine.
6. The photovoltaic and semiconductor thermoelectric combined power generation system of claim 1, wherein the film is a graphite film or a graphene film.
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| CN202011599322.4ACN112737079B (en) | 2020-12-29 | 2020-12-29 | Photovoltaic and semiconductor temperature difference combined power generation system |
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Cited By (5)
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| CN114337477A (en)* | 2022-01-06 | 2022-04-12 | 上海空间电源研究所 | Intelligent thermoelectric and photovoltaic integrated thermal management system |
| CN114785279A (en)* | 2022-06-02 | 2022-07-22 | 香港中文大学（深圳） | Integrated device of photovoltaic panel thermoelectric power generation and temperature control based on semiconductor thermoelectric effect |
| CN116744667A (en)* | 2023-07-04 | 2023-09-12 | 中国人民解放军陆军工程大学 | Strong electromagnetic pulse protection device and method for salt water saturation change of photovoltaic panel |
| WO2024021550A1 (en)* | 2022-07-29 | 2024-02-01 | 重庆跃达新能源有限公司 | Energy-saving system and method for photovoltaic power generation refrigeration |
| CN118367861A (en)* | 2024-06-13 | 2024-07-19 | 沈阳星尔建筑科技有限公司 | Light steel mobile house with photovoltaic and energy storage functions |
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