CN113765479B - Integrated solar photovoltaic heat accumulator and operation method - Google Patents
Integrated solar photovoltaic heat accumulator and operation method Download PDFInfo
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- CN113765479B CN113765479B CN202110909616.0A CN202110909616A CN113765479B CN 113765479 B CN113765479 B CN 113765479B CN 202110909616 A CN202110909616 A CN 202110909616A CN 113765479 B CN113765479 B CN 113765479B
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000005338 heat storage Methods 0.000 claims abstract description 41
- 239000012782 phase change material Substances 0.000 claims abstract description 24
- 239000011521 glass Substances 0.000 claims abstract description 16
- 230000005611 electricity Effects 0.000 claims abstract description 15
- 238000009825 accumulation Methods 0.000 claims abstract description 9
- 230000005494 condensation Effects 0.000 claims description 26
- 238000009833 condensation Methods 0.000 claims description 26
- 230000008020 evaporation Effects 0.000 claims description 9
- 238000001704 evaporation Methods 0.000 claims description 9
- 238000010248 power generation Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 6
- 238000004146 energy storage Methods 0.000 claims description 6
- 239000002918 waste heat Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000005341 toughened glass Substances 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- -1 ethylene-ethylene Chemical group 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 claims description 3
- 238000003491 array Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- 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
-
- 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
-
- 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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- Photovoltaic Devices (AREA)
Abstract
The invention provides an integrated solar photovoltaic heat accumulator and an operation method thereof, wherein the integrated solar photovoltaic heat accumulator comprises a glass cover plate, an EVA layer, a photovoltaic panel adhesion layer, a first micro-heat pipe array, a heat accumulation box, a phase change material, a second micro-heat pipe array and fins; the micro-heat pipe array is used as a core element and is effectively combined with the photovoltaic module, the solar energy is utilized to generate electricity, the temperature of the photovoltaic module is reduced by the absorbed solar energy, the electricity generation efficiency is improved, the heat is transmitted to the heat storage box filled with the phase change material through the second micro-heat pipe array, and surplus solar energy is effectively stored so as to play a key role when the solar energy is insufficient for the whole system to operate. The heat accumulator not only can utilize the solar photovoltaic panel to generate electricity, but also can reduce the temperature of the photovoltaic module to improve the electricity generation efficiency, effectively solves the characteristic of intermittence of sunlight, and realizes comprehensive utilization of solar energy.
Description
Technical Field
The invention belongs to the technical field of solar heat pumps, and particularly relates to an integrated solar photovoltaic heat accumulator and an operation method.
Background
The world of energy is also in the world of today, and is increasingly depleted towards conventional energy, and renewable energy is greatly developed, and solar energy is inexhaustible, or clean energy, and takes the leading role in renewable energy, but solar energy can not be effectively and fully utilized due to the intermittent problem of the solar energy, and the heat storage energy storage technology can better make up for the defect. At present, the solar energy comprehensive utilization and effective storage technology is somewhat lacking.
Disclosure of Invention
In order to solve the technical problems, the invention provides the integrated solar photovoltaic heat accumulator and the operation method thereof, the heat accumulator not only can utilize the solar photovoltaic panel to generate electricity, but also can reduce the temperature of the photovoltaic module to improve the electricity generation efficiency, and can also convey the collected solar energy and waste heat generated after the solar photovoltaic panel generates electricity to the heat accumulator for storage through the micro heat pipe array, thereby effectively solving the characteristic of solar intermittence and realizing the comprehensive utilization of solar energy.
In order to achieve the technical characteristics, the aim of the invention is realized in the following way: the integrated solar photovoltaic heat accumulator comprises a glass cover plate, an EVA layer, a photovoltaic plate adhesion layer, a first micro-heat pipe array, a heat accumulation box, a phase change material, a second micro-heat pipe array and fins;
the micro-heat pipe array is used as a core element and is effectively combined with the photovoltaic module, the solar energy is utilized to generate electricity, the temperature of the photovoltaic module is reduced by the absorbed solar energy, the electricity generation efficiency is improved, the heat is transmitted to the heat storage box filled with the phase change material through the second micro-heat pipe array, and surplus solar energy is effectively stored so as to play a key role when the solar energy is insufficient for the whole system to operate.
The glass cover plate is made of toughened glass, an EVA layer is stuck to the bottom surface of the glass cover plate, a photovoltaic plate is stuck to the bottom surface of the EVA layer, a thin photovoltaic plate adhesion layer is stuck to the bottom surface of the photovoltaic plate, a first micro-heat pipe array is longitudinally laid on the bottom surface of the photovoltaic plate adhesion layer, a heat storage box longer than the whole length of the assembly is stuck to the bottom surface of the glass cover plate, the EVA layer, the photovoltaic plate adhesion layer and the first micro-heat pipe array, a second micro-heat pipe array stuck to the first micro-heat pipe array is distributed in the heat storage box, fins are stuck to the second micro-heat pipe array, and phase change materials are filled around the second micro-heat pipe array and the fins.
The evaporation section of the second micro heat pipe array in the heat storage box is attached to the condensation section of the first micro heat pipe array, and the evaporation section of the second micro heat pipe array and the condensation section of the first micro heat pipe array form deflection with an angle of A.
The value of A is 60 degrees.
The fins are adhered to the periphery of the condensing section of the second micro heat pipe array so as to increase the heat exchange area around the condensing section and speed up the energy transmission speed of the second micro heat pipe array to the heat storage box.
And the second micro heat pipe array, the fins and the phase change material form a heat storage box.
The heat storage box is attached to the bottom surface of the first micro-heat pipe array, and the lengths of the upper end and the lower end of the whole heat storage box exceed the lengths of the photovoltaic module and the first micro-heat pipe array and are completely combined with the solar photovoltaic module, so that heat loss of the whole device is reduced; the phase change materials are filled in the positions except the second micro heat pipe array and the positions of the fins of the heat storage box, so that solar energy is effectively stored, and the purpose of solar energy storage is achieved while solar power generation and heat collection are achieved.
The EVA layer adopts ethylene-ethylene acetate copolymer.
The operation method of the integrated solar photovoltaic heat accumulator comprises the following steps of:
When sunlight is sufficient, the sunlight passes through the glass cover plate to reach the photovoltaic panel, at the moment, the battery in the photovoltaic panel absorbs light energy, different charges are accumulated at the two ends of the battery, namely, a photovoltaic effect is generated, and under the action, electromotive force is generated at the two ends of the solar battery, so that the light energy is converted into electric energy, and a user can directly utilize the electric energy through the conversion device;
Meanwhile, the heat energy absorbed by the photovoltaic plate is transferred to the first micro-heat pipe array through the photovoltaic plate adhesion layer by heat conduction, the temperature of the photovoltaic plate can be reduced in the process, the power generation efficiency of the photovoltaic plate is improved, the efficient heat transfer performance of the first micro-heat pipe array is utilized to transfer the heat from the evaporation section to the condensation section, at the moment, in a heat pump operation system, the heat of the condensation section exchanges heat with working media, the warmed working media enter a compressor for compression, the compressor compresses and warms the warmed working media to a superheated steam state, then the overheated working media are sent into a condenser for exchanging heat with water, and the heated water is transported to a terminal device for a user to use;
The cooled working medium is throttled and depressurized by a throttle valve and then returns to the integrated photovoltaic heat accumulator, when the condensation section of the second micro heat pipe array exchanges heat with the working medium, redundant heat and waste heat generated by photovoltaic power generation are transmitted to the condensation section of the second micro heat pipe array by utilizing the efficient heat transmission property of the second micro heat pipe array through the second micro heat pipe array in the heat accumulation box, the condensation section is stuck with fins, the heat dissipation of the condensation section can be accelerated by increasing the heat exchange area, the heat is stored in the heat accumulation box filled with phase change materials, and when the solar illumination is insufficient or the system runs at night, the energy in the heat accumulation box is transmitted to a working medium pipeline to exchange heat with the working medium through heat accumulation in daytime, and then the energy is transmitted to the tail end of a user through a compressor and a condenser.
The invention has the following beneficial effects:
1. The micro heat pipe array has high heat transmission efficiency, can reduce energy heat loss in the energy storage process, provides a device combining a heat storage box and a solar photovoltaic panel, can utilize the solar photovoltaic panel to generate electricity and simultaneously can transmit the absorbed solar energy, waste heat generated by the solar photovoltaic panel and the like to the heat storage box filled with phase change materials through the second micro heat pipe array, and can effectively store surplus solar energy so as to play a key role when the solar energy is insufficient for the whole system to operate. Effectively solves the intermittent characteristic of sunlight and realizes the comprehensive utilization of solar energy.
Drawings
The invention is further described below with reference to the drawings and examples.
Fig. 1 is a schematic side sectional structure of the present invention.
Fig. 2 is a partial detailed view of the thermal storage tank of the present invention.
In the figure: the solar cell comprises a glass cover plate 1, an EVA layer 2, a photovoltaic panel 3, a photovoltaic panel adhesion layer 4, a first micro-heat pipe array 5, a heat storage box 6, a phase change material 7, a second micro-heat pipe array 8 and fins 9.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
Referring to fig. 1-2, an integrated solar photovoltaic heat accumulator comprises a glass cover plate 1, an EVA layer 2, a photovoltaic panel 3, a photovoltaic panel adhesion layer 4, a first micro-heat pipe array 5, a heat accumulation box 6, a phase change material 7, a second micro-heat pipe array 8 and fins 9; the micro heat pipe array 8 is a core element and is effectively combined with a photovoltaic module, the solar energy is utilized to generate electricity, the temperature of the photovoltaic module is reduced by the absorbed solar energy, the electricity generation efficiency is improved, the heat is transmitted to the heat storage box 6 filled with the phase change material 7 through the second micro heat pipe array 8, and surplus solar energy is effectively stored so as to play a key role when the solar energy is insufficient for the whole system to operate. The micro heat pipe array has high heat transmission efficiency, can reduce energy heat loss in the energy storage process, provides a device combining a heat storage box and a solar photovoltaic panel, can utilize the solar photovoltaic panel to generate electricity and simultaneously can transmit the absorbed solar energy, waste heat generated by the solar photovoltaic panel and the like to the heat storage box filled with phase change materials through the second micro heat pipe array, and can effectively store surplus solar energy so as to play a key role when the solar energy is insufficient for the whole system to operate.
Further, toughened glass is adopted in the glass cover plate 1, an EVA layer 2 is stuck on the bottom surface of the toughened glass, a photovoltaic plate 3 is stuck on the bottom surface of the EVA layer 2, a thin photovoltaic plate adhesion layer 4 is stuck on the bottom surface of the photovoltaic plate 3, a first micro-thermal tube array 5 is longitudinally laid on the bottom surface of the photovoltaic plate adhesion layer 4, a heat storage box 6 which is longer than the whole length of the assembly is stuck on the bottom surface of the glass cover plate 1, the EVA layer 2, the photovoltaic plate 3, the photovoltaic plate adhesion layer 4 and the first micro-thermal tube array 5, a second micro-thermal tube array 8 which is stuck with the first micro-thermal tube array 5 is distributed in the heat storage box 6, fins 9 are stuck on the second micro-thermal tube array 8, and phase change materials 7 are filled around the second micro-thermal tube array 8 and the fins 9. The photovoltaic module can be used for converting solar energy into electric energy. The solar photovoltaic panel is utilized to generate electricity, and the absorbed solar energy can be conveyed to the heat storage box filled with the phase change material through the second micro heat pipe array 8, so that surplus solar energy can be effectively stored to play a key role when the solar energy is insufficient for the whole system to operate.
Further, the evaporation section of the second micro heat pipe array 8 in the heat storage box 6 is attached to the condensation section of the first micro heat pipe array 5, and the evaporation section of the second micro heat pipe array 8 and the condensation section of the first micro heat pipe array 5 form a deflection with an angle of A.
Further, the value of A is 60 degrees. By adopting the deflection, the optimal heat exchange effect is ensured, and the heat exchange efficiency is improved.
Further, the fins 9 are adhered around the condensation section of the second micro heat pipe array 8, so as to increase the heat exchange area around the condensation section, and speed the second micro heat pipe array 8 to transfer energy to the heat storage tank 6.
Further, the second micro heat pipe array 8, the fins 9 and the phase change material 7 form a heat storage box 6. The heat storage tank 6 serves the purpose of heat storage.
Furthermore, the heat storage box 6 is attached to the bottom surface of the first micro-heat pipe array 5, and the lengths of the upper end and the lower end of the whole heat storage box 6 exceed the lengths of the photovoltaic module and the first micro-heat pipe array 5, and the heat storage box is completely combined with the solar photovoltaic module, so that the heat loss of the whole device is reduced; the heat storage boxes 6 are filled with phase change materials 7 except for the second micro heat pipe arrays 8 and the gaps of the fins 9, so that solar energy is effectively stored, and the purpose of solar energy storage is achieved while solar power generation and heat collection are achieved. The heat storage tank 6 described above can be used to effectively store excess heat.
Further, the EVA layer 2 adopts an ethylene-ethylene acetate copolymer. The absorption capacity of solar energy can be improved by the material. Thereby improving the light energy conversion efficiency.
Example 2:
the operation method of the integrated solar photovoltaic heat accumulator comprises the following steps of:
When sunlight is enough, the sunlight passes through the glass cover plate 1 to reach the photovoltaic panel 3, and the batteries in the photovoltaic panel 3 absorb light energy, and different charges are accumulated at the two ends of the batteries, namely a photovoltaic effect is generated, and under the effect, electromotive force is generated at the two ends of the solar batteries to convert the light energy into electric energy, so that a user can directly utilize the electric energy through the conversion device;
Meanwhile, the heat energy absorbed by the photovoltaic panel 3 is transmitted to the first micro heat pipe array 5 through the photovoltaic panel adhesion layer 4 by heat conduction, the temperature of the photovoltaic panel 3 can be reduced in the process, the power generation efficiency of the photovoltaic panel is improved, the heat energy is transmitted from the evaporation section to the condensation section by utilizing the efficient heat transmission property of the first micro heat pipe array 5, at the moment, in a heat pump operation system, the heat energy of the condensation section exchanges heat with working media, the warmed working media enter a compressor for compression, the warmed working media are compressed and warmed to a superheated steam state by the compressor, and then the superheated steam is transmitted into a condenser for heat exchange with water, and the heated water is transmitted to a terminal device for a user;
The cooled working medium is throttled and depressurized by a throttle valve and then returns to the integrated photovoltaic heat accumulator, when the condensation section of the second micro heat pipe array 8 exchanges heat with the working medium, redundant heat and waste heat generated by photovoltaic power generation are transmitted to the condensation section of the second micro heat pipe array 8 by utilizing the efficient heat transmission property of the second micro heat pipe array 8 through the second micro heat pipe array 8, the condensation section is stuck with fins 9, the heat dissipation of the condensation section can be accelerated by increasing the heat exchange area, the heat is stored in the heat accumulating box 6 filled with the phase change material 7, and when the solar illumination is insufficient or the system operates at night, the energy in the heat accumulating box 6 is transmitted to a working medium pipeline to exchange heat with the working medium through heat accumulation in the daytime, and then the energy is transmitted to the tail end of a user through a compressor and a condenser.
Claims (4)
1. The integrated solar photovoltaic heat accumulator is characterized in that: the solar cell comprises a glass cover plate (1), an EVA layer (2), a photovoltaic plate (3), a photovoltaic plate adhesion layer (4), a first micro-heat pipe array (5), a heat storage box (6), a phase change material (7), a second micro-heat pipe array (8) and fins (9);
the second micro heat pipe array (8) is used as a core element and is effectively combined with the photovoltaic module, the temperature of the photovoltaic module is reduced by utilizing the absorbed solar energy while the solar photovoltaic panel is used for generating electricity, the generating efficiency of the photovoltaic module is improved, the energy is conveyed to the heat storage box (6) filled with the phase change material (7) through the second micro heat pipe array (8), and surplus solar energy is effectively stored so as to play a key role when the solar energy is insufficient for the whole system to operate;
The glass cover plate (1) is made of toughened glass, an EVA layer (2) is adhered to the bottom surface of the glass cover plate, a photovoltaic plate (3) is adhered to the bottom surface of the EVA layer (2), a thin photovoltaic plate adhesion layer (4) is adhered to the bottom surface of the photovoltaic plate (3), a first micro-heat pipe array (5) is longitudinally laid on the bottom surface of the photovoltaic plate adhesion layer (4), a heat storage box (6) which is longer than the whole length of the assembly is adhered to the bottom surface of the glass cover plate (1), the EVA layer (2), the photovoltaic plate (3), the photovoltaic plate adhesion layer (4) and the first micro-heat pipe array (5), a second micro-heat pipe array (8) which is adhered to the first micro-heat pipe array (5) is distributed in the heat storage box (6), fins (9) are adhered to the second micro-heat pipe array (8), and phase change materials (7) are filled around the second micro-heat pipe array (8) and the fins (9);
the evaporation section of the second micro heat pipe array (8) in the heat storage box (6) is attached to the condensation section of the first micro heat pipe array (5), and the evaporation section of the second micro heat pipe array (8) and the condensation section of the first micro heat pipe array (5) form deflection with an angle A;
the value of A is 60 degrees;
the fins (9) are adhered to the periphery of the condensing section of the second micro heat pipe array (8) so as to increase the heat exchange area around the condensing section and speed up the energy transmission speed of the second micro heat pipe array (8) to the heat storage box (6);
the second micro heat pipe array (8), the fins (9) and the phase change material (7) form a heat storage box (6).
2. The integrated solar photovoltaic thermal accumulator according to claim 1, characterized in that: the heat storage box (6) is attached to the bottom surface of the first micro-heat pipe array (5), and the lengths of the upper end and the lower end of the whole heat storage box (6) exceed the lengths of the photovoltaic module and the first micro-heat pipe array (5), and the heat storage box is completely combined with the solar photovoltaic module to reduce heat loss of the whole device; the heat storage boxes (6) are filled with phase change materials (7) except for the second micro heat pipe arrays (8) and the fins (9), so that solar energy is effectively stored, and the purpose of solar energy storage is achieved while solar power generation and heat collection are achieved.
3. The integrated solar photovoltaic thermal accumulator according to claim 1, characterized in that: the EVA layer (2) adopts ethylene-ethylene acetate copolymer.
4. A method of operating an integrated solar photovoltaic thermal storage according to any of claims 1 to 3, comprising the steps of:
When sunlight is sufficient, the sunlight passes through the glass cover plate (1) to reach the photovoltaic plate (3), and the batteries in the photovoltaic plate (3) absorb light energy, so that different charges are accumulated at the two ends of the batteries, namely a photovoltaic effect is generated, and under the effect, electromotive force is generated at the two ends of the solar batteries, so that the light energy is converted into electric energy, and a user can directly utilize the electric energy through the conversion device;
meanwhile, the heat energy absorbed by the photovoltaic panel (3) is transmitted to the first micro heat pipe array (5) through the photovoltaic panel adhesion layer (4) by heat conduction, the temperature of the photovoltaic panel (3) can be reduced in the process, the power generation efficiency of the photovoltaic panel is improved, the heat energy is transmitted from the evaporation section to the condensation section by utilizing the efficient heat transmission property of the first micro heat pipe array (5), at the moment, in a heat pump operation system, the heat of the condensation section exchanges heat with a working medium, the warmed working medium enters a compressor for compression, the compressor compresses and warms the warmed working medium to a superheated steam state, then the superheated steam is transmitted into a condenser for heat exchange with water, and the heated water is transmitted to a terminal device for a user to use;
The cooled working medium is throttled and depressurized by a throttle valve and then returns to the integrated photovoltaic heat accumulator, when the condensation section of the second micro heat pipe array (8) exchanges heat with the working medium, redundant heat and waste heat generated by photovoltaic power generation are transmitted to the working medium pipeline to exchange heat with the working medium by the second micro heat pipe array (8) through the second micro heat pipe array (8), the heat is transmitted to the condensation section of the second micro heat pipe array (8), fins (9) are attached to the condensation section, the heat exchange area is increased, the heat dissipation of the condensation section can be accelerated, the heat is stored into the heat accumulating box (6) filled with the phase change material (7), and when the solar energy is insufficient or the system is operated at night, the energy in the heat accumulating box (6) is transmitted to the working medium pipeline to exchange heat with the working medium through heat accumulation in daytime, and then the energy is transmitted to the tail end of a user through a compressor and a condenser.
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CN105758021A (en) * | 2016-04-07 | 2016-07-13 | 同度能源科技(江苏)股份有限公司 | Solar heat collection device with phase-change heat-storage heat tubes |
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CN105758021A (en) * | 2016-04-07 | 2016-07-13 | 同度能源科技(江苏)股份有限公司 | Solar heat collection device with phase-change heat-storage heat tubes |
CN109617509A (en) * | 2018-12-13 | 2019-04-12 | 广东五星太阳能股份有限公司 | A kind of phase-transition heat-storage photovoltaic and photothermal solar flat plate collector |
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