CN108768293B - Light-gathering flat plate type photovoltaic and photo-thermal integrated composite solar heat collector - Google Patents
Light-gathering flat plate type photovoltaic and photo-thermal integrated composite solar heat collector Download PDFInfo
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- CN108768293B CN108768293B CN201810308002.5A CN201810308002A CN108768293B CN 108768293 B CN108768293 B CN 108768293B CN 201810308002 A CN201810308002 A CN 201810308002A CN 108768293 B CN108768293 B CN 108768293B
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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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- 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
-
- 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
Abstract
The invention discloses a light-gathering flat plate type photovoltaic and photo-thermal integrated composite solar heat collector, which relates to the field of solar photovoltaic and photo-thermal integrated application and comprises a linear Fresnel lens, a photovoltaic module and a cooling module; the photovoltaic module is arranged below the linear Fresnel lens and converts solar radiation energy into electric energy; the cooling module is arranged below the photovoltaic module and used for cooling the photovoltaic module, improving the photoelectric conversion efficiency and utilizing waste heat; the cooling module comprises a heat absorbing plate and a PVC structure positioned below the heat absorbing plate, wherein an upward opening groove is formed in the upper surface of the PVC structure, and a flow channel is formed in the upper surface of the PVC structure by the upward opening groove. The invention solves the problem of connection between the flow channel and the heat absorbing plate, improves the comprehensive utilization efficiency of the system, has the advantages of simple structure, low cost, light weight and good cooling effect, and is convenient to manufacture and produce in a large scale.
Description
Technical Field
The invention relates to the field of solar photovoltaic photo-thermal integration application, in particular to a light-gathering flat plate type photovoltaic photo-thermal integration composite solar heat collector.
Background
The efficient utilization of solar energy is one of effective ways to solve the problems of energy shortage and environmental pollution. At present, solar photovoltaic and photothermal utilization technologies are becoming mature. However, the subsequent development of the solar industry is restricted by the problems of low radiation density, instability, high cost and the like of solar energy, the light-gathering technology can enable the photovoltaic cell to output more electric quantity per unit area, the defects are effectively relieved, and the utilization rate of the solar energy in the area with weak illumination intensity is improved. The linear Fresnel lens is low in cost and easy to install, and can meet the actual requirements of small-sized family users.
The efficiency of a commercial monocrystalline silicon battery can reach 15% -18% under a standard test working condition, and most of the rest energy is converted into heat. However, due to the limitation of the silicon material, the electrical efficiency of the photovoltaic cell gradually decreases as the temperature of the photovoltaic cell increases, the temperature of the photovoltaic cell is increased more obviously due to the use of the light gathering device, the electrical efficiency is decreased sharply, and meanwhile, the service life of the photovoltaic cell and the whole heat collecting device is shortened due to the long-time high-intensity radiation. Adopt different cooling medium (like water or air) to cool off photovoltaic cell, produce low-grade heat again when can improving the generating efficiency, compare with the device of utilizing light heat and photovoltaic alone, saved installation cost and space, improved energy utilization, increase the operating life of whole device. The heat collector with the flat plate structure is easy to integrate with a building, and can meet the requirements of modern building development.
The heat absorbing plate and the cooling flow channel in the traditional photovoltaic photo-thermal integrated solar collector mostly adopt a tube-plate structure, namely, the copper heat absorbing plate is connected with the circular flow channel, the connection mostly adopts a welding process, if the thickness of the copper heat absorbing plate is too thin, the copper heat absorbing plate is easy to break through and deform in the welding process, if the thickness is too thick, the heat transfer and the weight of the device are influenced, and the tube-plate structure has high requirement on the welding process, is difficult to process and influences the attractiveness; on the other hand, the actual contact area of the heat absorbing plate and the flow channel is close to line contact, the heat exchange area is too small, the total thermal resistance is too large, the heat transfer is influenced, and the photoelectric and photothermal conversion efficiency of the whole system is reduced; meanwhile, the heat absorbing plate and the circular flow channel are made of copper, so that the initial investment cost is high.
Therefore, the technical personnel in the field are dedicated to develop a light-gathering flat plate type photovoltaic and photothermal integrated composite solar heat collector, the novel runner structure is adopted, the connection problem of the runner and the heat absorbing plate is solved, the integration of a heat insulating material and the runner is realized, and the solar heat collector also has the advantages of light weight, low cost, simple structure, convenient processing and good cooling effect, is easy to manufacture and produce on a large scale, and simultaneously improves the photovoltaic and photothermal comprehensive utilization efficiency, the service life and the stability of the whole device.
Disclosure of Invention
In view of the above defects in the prior art, the technical problem to be solved by the invention is the connection problem of the flow channel and the heat absorbing plate, the defects of large thermal resistance and high cost of the traditional tube-plate structure are overcome, the integrated design of the flow channel and the heat insulating material is realized, the manufacturing process is simple, the large-scale production is convenient, the comprehensive photovoltaic and photothermal utilization efficiency of the whole device can be improved, and the operation life and the stability are prolonged.
In order to achieve the purpose, the invention provides a concentrating flat plate type photovoltaic and photothermal integrated composite solar heat collector, which comprises a linear Fresnel lens, a photovoltaic module and a cooling module; the photovoltaic module is arranged below the linear Fresnel lens and is used for converting solar radiation energy collected to the surface of the photovoltaic module by the linear Fresnel lens into electric energy; the cooling module is arranged below the photovoltaic module and used for cooling the photovoltaic module, prolonging the service life of the photovoltaic module, improving the photoelectric conversion efficiency and utilizing waste heat; the cooling module comprises a heat absorbing plate and a PVC structure positioned below the heat absorbing plate, wherein an upward opening groove is formed in the upper surface of the PVC structure, and a flow channel is formed in the upper surface of the PVC structure by the upward opening groove; the upper surface of the absorber plate is connected with the outer surface of the bottom of the photovoltaic module, and the lower surface of the absorber plate is connected with the contact part of the PVC structure. The linear Fresnel lens collects the solar radiation on the photovoltaic module in a light band form, so that the energy flux density of the solar radiation is improved; arranging a flow channel on the surface of the PVC structure to realize the integrated design of the flow channel and the heat insulation material; the cooling medium can be directly contacted with the heat absorbing plate through the flow channel, so that the cooling effect is improved, and the photoelectric conversion efficiency of the photovoltaic cell is enhanced.
Furthermore, the light-gathering flat plate type photovoltaic and photothermal integrated composite solar heat collector also comprises a supporting frame; the supporting frame comprises a long column, an upper layer frame and a lower layer frame arranged below the upper layer frame; one end of the long column is fixed on the upper layer frame, and the other end of the long column is fixed on the lower layer frame; the linear Fresnel lens is fixed on the upper-layer frame, and the photovoltaic module and the cooling module are installed in the lower-layer frame. The support frame is used for supporting the linear Fresnel lens, the photovoltaic module and the cooling module, wherein the vertical distance between the linear Fresnel lens and the photovoltaic module can be changed by adjusting the vertical length of the long column so as to adjust the energy flux density distribution on the upper surface of the photovoltaic module.
Further, the photovoltaic module includes a photovoltaic assembly and a glass cover plate positioned thereon.
Further, the photovoltaic module comprises a first EVA adhesive, a photovoltaic cell, a second EVA adhesive and a transparent back plate; the first EVA adhesive, the photovoltaic cell, the second EVA adhesive and the transparent back plate are sequentially connected from top to bottom. The photovoltaic module forms an integrated photovoltaic cell panel, protects the photovoltaic cell and has good electrical insulation, oxidation resistance and corrosion resistance.
Furthermore, the side surface of the glass cover plate is hermetically connected with the inner surface of the lower layer frame, and the function of the glass cover plate is to prevent dust and water vapor from permeating; a gap is reserved between the lower surface of the glass cover plate and the upper surface of the photovoltaic assembly, a sealing space is formed by the glass cover plate, the photovoltaic assembly and part of the inner surface of the lower-layer frame, and the sealing space is filled with air to prevent heat dissipation.
Furthermore, the heat absorbing plate is made of copper, so that heat exchange resistance can be effectively reduced.
Further, the support frame is an aluminum product.
Further, the flow channels may be arranged in a parallel form or a series form; the parallel connection mode is that a plurality of parallel branch direct-flow channels are arranged between a first direct-flow channel and a second direct-flow channel, wherein one end of the first direct-flow channel is set as a cooling medium inlet, and one end of the second direct-flow channel is set as a cooling medium outlet; the series connection mode means that a plurality of direct current channels are connected end to form a flow channel, one end of the flow channel is set as a cooling medium inlet, and the other end of the flow channel is set as a cooling medium outlet.
Further, the cross-sectional shape of the flow channel can be set to be one or more of a rectangle, a semicircle, a triangle and a trapezoid.
Furthermore, the lower-layer frame is also filled with an insulating layer, and the structure prevents heat loss and can meet the requirement of building integration.
Compared with the prior art, the concentrating flat plate type photovoltaic and photothermal integrated composite solar heat collector provided by the invention has the following beneficial effects:
1) according to the invention, the groove is formed on the upper surface of the PVC material to form the flow channel, and the flow channel is directly connected with the heat absorption plate, so that the process is simple, the defects of the traditional welding connection are avoided, and the quality is ensured.
2) The cooling medium directly contacts with the heat absorbing plate to exchange heat through the flow channel, so that the cooling effect is improved.
3) The PVC structure (with certain heat preservation performance) is adopted to replace the traditional copper pipe, the price is low, the weight is light, and the integrated design of the heat preservation layer material and the flow channel is realized.
4) The energy flux density of solar radiation is improved by adopting a linear Fresnel lens condensation technology; meanwhile, the linear Fresnel lens is low in cost and easy to install.
5) According to the concentrating flat plate type photovoltaic and photothermal integrated composite solar heat collector, the photovoltaic module is cooled by the cooling medium, the service life of a photovoltaic cell is prolonged, and the photoelectric conversion efficiency is improved; meanwhile, heat carried by the cooling medium is fully utilized in life, and the comprehensive utilization efficiency of the whole device is improved.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is an exploded view of the overall structure of a preferred embodiment of the present invention;
FIG. 2 is an exploded schematic view of the photovoltaic module and cooling module of the preferred embodiment shown in FIG. 1;
FIG. 3 is a schematic view of a series connection of channels on a PVC structure;
FIG. 4 is a schematic diagram of the parallel arrangement of the flow channels on the PVC structure;
FIG. 5 is a schematic view of a flow channel with a square cross-section;
FIG. 6 is a schematic view of a flow channel with a semi-circular cross-section;
FIG. 7 is a schematic view of a flow channel with a triangular cross-section;
FIG. 8 is a schematic view of a flow channel with a trapezoidal cross-section;
the solar cell comprises a support frame 1, a heat insulation layer 2, a linear Fresnel lens 3, a clamping groove 4, a cooling medium inlet 5, a cooling medium outlet 6, a glass cover plate 7, an air interlayer 8, a first EVA (ethylene vinyl acetate) adhesive 9, a photovoltaic cell 10, a second EVA adhesive 11, a transparent back plate 12, a heat absorption plate 13 and a PVC (polyvinyl chloride) structure 14.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components has been exaggerated where appropriate in the drawings to make the illustration clearer.
As shown in fig. 1 and 2, a light-condensing flat-type integrated photovoltaic and photothermal composite solar collector in a preferred embodiment of the present invention includes a linear fresnel lens 3, a photovoltaic module and a cooling module; the linear Fresnel lens 3 collects solar radiation to the upper surface of the photovoltaic module in a linear light band form, energy flux density is improved, specific application requirements can be met by changing the area size of the linear Fresnel lens 3 and adjusting the vertical distance between the linear Fresnel lens and the photovoltaic module below the linear Fresnel lens, and the linear Fresnel lens is convenient to install, low in cost and suitable for small-sized family users; the photovoltaic module is arranged below the linear Fresnel lens 3 and is used for converting solar radiation collected by the linear Fresnel lens 3 to the photovoltaic module into electric energy; the cooling module is arranged below the photovoltaic module and used for cooling the photovoltaic module, prolonging the service life of the photovoltaic module, improving the photoelectric conversion efficiency and utilizing waste heat; it is characterized in that the cooling module comprises a heat absorbing plate 13 and a PVC structure 14 located thereunder, in the preferred embodiment, the heat absorbing plate 13 is made of copper, and the PVC structure 14 is made of hard PVC material; the upper surface of the PVC structure 14 is provided with an upward opening groove, and the upward opening groove forms a flow channel on the upper surface of the PVC structure 14; the upper surface of the absorber plate 13 is connected to the bottom outer surface of the photovoltaic module and the lower surface of the absorber plate 13 is connected to the contact portion of the PVC structure 14. The heat conductivity coefficient of the PVC structure 14 is low, the PVC structure can be used as a heat insulation layer, and the flow channel arranged on the surface of the PVC structure 14 is equivalent to the integrated design of the flow channel and the heat insulation material. The cooling medium can be directly contacted with the heat absorbing plate 13 through the flow channel, so that the cooling effect is improved, and the photoelectric conversion efficiency of the photovoltaic cell is enhanced.
The photovoltaic module is connected with the heat absorbing plate 13 in a manner that the photovoltaic module is bonded with the heat absorbing plate 13 below through heat-conducting silica gel or a gasket with high heat conductivity coefficient, and the heat-conducting silica gel or the gasket needs to be integrally covered on the upper surface of the heat absorbing plate 13 so as to reduce air thermal resistance and ensure good heat-conducting capacity.
The heat absorbing plate 13 is directly connected with the PVC structure 14, the peripheral edges of the two materials are correspondingly tapped, and a connection mode of threaded connection is adopted; and for the middle contact part, the heat conducting silica gel or the gasket is used for bonding, so that the series flow and the leakage of cooling media among different channels are prevented while the heat transfer is ensured. The connection mode can ensure the direct contact between the cooling medium and the heat absorbing plate 13, avoids the problems of complex processing, overlarge thermal resistance, high cost and the like caused by a welding connection process when a tube-plate structure is adopted, effectively improves the heat transfer effect, and optimizes the comprehensive utilization efficiency of the whole device.
The concentrating flat plate type photovoltaic and photothermal integrated composite solar collector in the preferred embodiment of the invention further comprises a supporting frame 1, preferably, the supporting frame 1 is made of aluminum, and the supporting frame 1 is used for supporting the linear Fresnel lens 3, the photovoltaic module and the cooling module; the supporting frame 1 comprises two long columns, an upper layer frame and a lower layer frame arranged below the upper layer frame; a clamping groove 4 is formed in the inner surface of the upper layer frame, and the linear Fresnel lens 3 is fixed on the upper layer frame through the clamping groove 4; the lower-layer framework is an upward opening container surrounded by double-layer aluminum plates, the photovoltaic module and the cooling module are sequentially arranged in the opening container from top to bottom, and the side surfaces of the photovoltaic module and the cooling module are connected with the inner side of the supporting framework 1 through strong glue to prevent the structure of the whole device from loosening; the heat-insulating layer 2 is filled between the double-layer aluminum plates of the lower-layer framework, preferably, the heat-insulating layer 2 is made of glass wool materials, the filling is easy, the cost is low, the structure prevents heat loss, and the requirement of building integration can be met; two long columns are respectively arranged at two opposite sides of the supporting frame 1, one end of each long column is fixed on the lower surface of the upper-layer frame, the other end of each long column is fixed on the outer surface of the side edge of the lower-layer frame, the connection mode is welding or thread tapping connection, for the thread tapping connection, an inner thread is tapped at the connection part of the upper-layer frame or the lower-layer frame and the long columns, and a bolt corresponding to the outer thread is adopted for connection; preferably, the vertical distance between the linear fresnel lens and the photovoltaic module can be adjusted by adjusting the vertical length of the long post to change the photovoltaic module upper surface energy flux density distribution.
The photovoltaic module comprises a photovoltaic module and a glass cover plate 7 positioned thereon. The photovoltaic module comprises a first EVA adhesive 9, a photovoltaic cell 10, a second EVA adhesive 11 and a transparent back plate 12; the photovoltaic cell 10 is formed by connecting monocrystalline silicon cells in series and fully paving; the first EVA adhesive 9, the photovoltaic cell 10, the second EVA adhesive 11 and the transparent back plate 12 are sequentially connected from top to bottom by adopting a thermal lamination technology. The photovoltaic module forms an integrated photovoltaic cell panel, protects the photovoltaic cell 10, and has good electrical insulation, oxidation resistance and corrosion resistance. The glass cover plate 7 is made of toughened glass with high light transmittance, and the side face of the glass cover plate 7 is hermetically connected with the inner surface of the lower-layer frame by glass cement to prevent dust and water vapor from permeating; a gap is reserved between the lower surface of the glass cover plate and the upper surface of the photovoltaic assembly, a sealing space is formed by the glass cover plate, the photovoltaic assembly and part of the inner surface of the lower layer frame, and the sealing space is filled with air. The sealed space forms an air interlayer 8 to prevent heat loss.
The flow channels can be arranged in a parallel form or a series form; as shown in fig. 4, the parallel connection mode means that a plurality of parallel branch straight flow channels are arranged between a first straight flow channel and a second straight flow channel, wherein one end of the first straight flow channel is provided as a cooling medium inlet 5, and one end of the second straight flow channel is provided as a cooling medium outlet 6, and preferably, the hydraulic diameters of the first straight flow channel and the second straight flow channel are larger than those of the branch straight flow channels, so as to realize better uniform flow dividing effect; as shown in fig. 3, the serial form means that a plurality of direct flow channels are connected end to form a flow channel, one end of the flow channel is provided as a cooling medium inlet 5, and the other end of the flow channel is provided as a cooling medium outlet 6. The cooling medium inlet 5 and the cooling medium outlet 6 are respectively provided with corresponding penetrating holes at the position of the lower layer frame, so that the cooling medium can be conveniently led in or out from the corresponding positions.
As shown in fig. 5, 6, 7 and 8, the cross-sectional shape of the flow channel may be rectangular, semicircular, triangular or trapezoidal as required.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (9)
1. A light-gathering flat plate type photovoltaic and photothermal integrated composite solar heat collector comprises a linear Fresnel lens, a photovoltaic module and a cooling module; the photovoltaic module is arranged below the linear Fresnel lens and is used for converting solar radiation energy collected by the linear Fresnel lens to the photovoltaic module into electric energy; the cooling module is arranged below the photovoltaic module and used for cooling the photovoltaic module, improving the photoelectric conversion efficiency and utilizing waste heat; the cooling module is characterized by comprising a heat absorbing plate and a PVC structure positioned below the heat absorbing plate, wherein the upper surface of the PVC structure is provided with an upward-opening groove, and the upward-opening groove forms a flow channel on the upper surface of the PVC structure, so that the integrated design of the flow channel and a heat insulation material is realized; the upper surface of the heat absorbing plate is connected with the outer surface of the bottom of the photovoltaic module, and the lower surface of the heat absorbing plate is connected with the contact part of the PVC structure; also includes a support frame; the supporting frame comprises a long column, an upper layer frame and a lower layer frame arranged below the upper layer frame; one end of the long column is fixed on the upper layer frame, and the other end of the long column is fixed on the lower layer frame; the linear Fresnel lens is fixed on the upper layer frame, and the photovoltaic module and the cooling module are arranged in the lower layer frame; tapping internal threads at the connecting part of the upper layer frame or the lower layer frame and the long column, and connecting by adopting bolts corresponding to the external threads; the vertical distance between the linear fresnel lens and the photovoltaic module can be adjusted by adjusting the vertical length of the long pillars to change the photovoltaic module upper surface fluence distribution.
2. The concentrating flat panel pv-photothermal integrated composite solar collector of claim 1, wherein said pv module comprises a pv module and a glass cover plate positioned above it.
3. The concentrating flat plate type photovoltaic and photothermal integrated composite solar collector according to claim 2, wherein the photovoltaic module comprises a first EVA glue, a photovoltaic cell, a second EVA glue and a transparent backsheet; the first EVA adhesive, the photovoltaic cell, the second EVA adhesive and the transparent back plate are sequentially connected from top to bottom.
4. The concentrating flat-plate type photovoltaic and photothermal integrated composite solar collector according to claim 2, wherein the side surface of the glass cover plate is hermetically connected with the inner surface of the lower frame; a gap is reserved between the lower surface of the glass cover plate and the upper surface of the photovoltaic assembly, a sealing space is formed by the glass cover plate, the photovoltaic assembly and part of the inner surfaces of the lower layer of the framework, and the sealing space is filled with air.
5. The concentrating flat-panel type photovoltaic and photothermal integrated composite solar collector according to claim 1, wherein the heat absorbing panel is made of copper.
6. The concentrating flat-panel photovoltaic and photothermal integrated composite solar collector according to claim 1, wherein said support frame is made of aluminum.
7. The concentrating flat-plate type photovoltaic and photothermal integrated composite solar collector according to claim 1, wherein the flow channels can be arranged in parallel or in series; the parallel connection mode is that a plurality of parallel branch direct-flow channels are arranged between a first direct-flow channel and a second direct-flow channel, wherein one end of the first direct-flow channel is set as a cooling medium inlet, and one end of the second direct-flow channel is set as a cooling medium outlet; the series connection mode means that a plurality of direct current channels are connected end to form a flow channel, one end of the flow channel is set as a cooling medium inlet, and the other end of the flow channel is set as a cooling medium outlet.
8. The concentrating flat-plate type photovoltaic and thermal integrated composite solar collector as claimed in claim 1, wherein the cross-sectional shape of the flow channel can be one or more of rectangular, semicircular, triangular and trapezoidal.
9. The concentrating flat-panel type photovoltaic and thermal integrated composite solar collector as claimed in claim 1, wherein the lower frame is further filled with an insulating layer.
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| CN109724265A (en) * | 2018-12-27 | 2019-05-07 | 廊谷(天津)新能源科技有限公司 | A kind of photovoltaic and photothermal integral component |
| CN109945715A (en) * | 2019-04-24 | 2019-06-28 | 东莞市劲腾精彩空气处理技术有限公司 | Heat exchanger and preparation method thereof based on PCM heat-storing material |
| CN113794443A (en) * | 2021-08-06 | 2021-12-14 | 浙大宁波理工学院 | Photovoltaic and photothermal integrated building material photovoltaic module |
| CN115132870A (en) * | 2022-07-07 | 2022-09-30 | 陕西煤业新型能源科技股份有限公司 | Solar photovoltaic micro-channel cooling device based on electroosmosis driving |
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