CN203839391U - Solar Photovoltaic Photothermal Composite Module - Google Patents

Abstract

The utility model discloses a solar photovoltaic and photo-thermal composite assembly. The solar photovoltaic and photo-thermal composite assembly comprises a photovoltaic assembly and a photo-thermal assembly. The photovoltaic assembly includes solar photovoltaic cells, and an EVA film layer and a transparent resin protective layer that are successively bonded to the upper surfaces of the solar photovoltaic cells. An ETFE film layer and a heat conduction base plate are successively bonded to the lower surfaces of the solar photovoltaic cells. A flexible graphite plate is disposed between the ETFE film layer and the heat conduction base plate. The service life of the solar photovoltaic assembly and the photo-thermal assembly is prolonged. The solar photovoltaic and photo-thermal composite assembly is a photovoltaic and photo-thermal integrated assembly that has a simple structure, is convenient to mount and is low in cost. The photovoltaic and photo-thermal integrated assembly enables the conversion efficiency of photovoltaic cells to be increased, the photo-thermal and photovoltaic conversion performance to be improved and the solar utilization efficiency to be increased, allows solar power generation and hot water supplying to be achieved by the same body at the same time, and helps to save space resources.

Description

Solar Photovoltaic Photothermal Composite Module

technical field

The utility model relates to the technical field of solar power generation, in particular to a solar photovoltaic photothermal composite assembly.

Background technique

The solar cell module is mainly made on the basis of semiconductor materials, and its basic structure includes a frame body and a module structure arranged in the frame body. Among them, the module structure includes a light-transmitting front surface glass substrate, a transparent seal (such as EVA glue), a battery sheet and a back-sealing film (rear surface protection components, such as PVF polyvinyl fluoride, TPT/TPE), etc. The working principle is that sunlight shines on the photoelectric generating device through the substrate, and the photoelectric generating device directly converts light energy into electrical energy through the photoelectric effect, and outputs the electrical energy through the photovoltaic junction box used with the battery module for use. In the process of converting light energy into electrical energy, solar cells do not convert all light energy into electrical energy. Theoretical studies have shown that the theoretical physical limit of the conversion efficiency of solar cells made of unipolar single crystal silicon at 0°C is 30%. Under the condition of a certain light intensity, the output power will decrease when the temperature of the silicon cell itself rises. In practical applications, under standard conditions, the average efficiency of crystalline silicon cells is around 15%. In other words, solar cells can only convert 15% of light energy into usable electrical energy, and the remaining 85% are converted into heat energy. During the conversion process, with the increase of heat energy, the temperature of the battery will continue to rise. In addition to the greatly reduced photoelectric conversion efficiency, the service life of the solar battery will also be shortened. In order to make the solar cell module work normally for a long time, in the prior art, a heat dissipation device (similar to water cooling, air cooling and other heat dissipation systems, absorbing heat through circulating water or circulating air to achieve the purpose of heat dissipation) is added outside the frame. However, thermal energy is also a part of the solar radiation energy absorbed by solar cell components. If this part of energy can be taken out and collected, and used instead of being regarded as harmful heat that needs to be dissipated, the purpose of making full use of energy can be achieved and broadened function of the solar cell module. In order to keep the battery efficiency at a high level as much as possible, make full use of the absorbed solar radiation energy, avoid the influence of heat on the photoelectric conversion efficiency of the module, and prolong the service life of the battery module, it is possible to set a heat-conducting layer on the solar battery module, which will The heat energy generated during the photoelectric conversion process is absorbed and conducted, and is exported to the component structure by the connected heat-conducting element, collected by the external heat-taking pipeline, and provided to the subsequent heat energy equipment for use. According to its arrangement position inside or outside the sealing member of the solar module, the heat conduction layer is made of insulating material or high heat conduction material. The heat conduction element may be a metal element with high heat conductivity, or a heat pipe with a higher heat conductivity than the metal element.

Composite components for comprehensive utilization of solar photovoltaic light and heat are currently being studied, most of which are to weld the heat collecting tube to the heat collecting plate with ultrasonic waves, and the heat collecting plate is attached to the solar photovoltaic module, or the heat collecting tube is fixedly connected to the backlight of the solar photovoltaic module. surface, and then install heat insulation boards under the heat collecting tubes to form. The heat collecting tube is fixed on the back of the photovoltaic module, and is in hard contact with the photovoltaic module and the heat insulation board. Since solar photovoltaic photothermal components are generally used outdoors, and during transportation and installation, the heat collector tube or plate is in hard contact with the photovoltaic module, heat collector tube and heat insulation backplane, and the cells are easily broken. Moreover, the glazed surface of the photovoltaic module is not completely flat, and the contact with the heat collecting plate is not good, which affects the heat transfer efficiency.

Utility model content

In order to solve the above technical problems, the utility model provides a solar photovoltaic photothermal composite assembly, which improves the service life of the photovoltaic assembly, and provides a photovoltaic photothermal integrated assembly with simple structure, convenient installation and low cost. Integrated components can increase the conversion efficiency of photovoltaic cells and increase the conversion efficiency of solar energy per unit area.

The solar photovoltaic photothermal composite assembly of the utility model includes a photovoltaic assembly and a photothermal assembly. The photovoltaic assembly includes a solar photovoltaic battery sheet and an EVA film layer and a transparent resin protective layer that are sequentially bonded on the upper surface of the solar photovoltaic assembly. A tetrafluoroethylene ETFE film layer and a heat-conducting bottom plate are bonded, and a flexible graphite plate is arranged between the tetrafluoroethylene ETFE film layer and the heat-conducting bottom plate;

Further, the photothermal assembly includes a heat collecting tube arranged on the back of the heat conducting bottom plate, a heat insulating back plate is set outside the heater, and a rubber and plastic insulation layer is set between the heat collecting tube and the heat insulating back plate;

Further, the rubber and plastic insulation layer is provided with a groove for matching and fixing with the outer surface of the heat collecting tube;

Further, the heat collecting tubes are a plurality of hollow copper tubes fixed to the heat conduction bottom plate in a parallel manner;

Further, the heat collecting tube is a serpentine coil;

Further, the hollow copper tube is welded and fixed to the heat conduction bottom plate, and the heat conduction bottom plate is an aluminum plate;

Further, the transparent resin protective layer is a tempered glass cover plate;

Further, the distance between the tempered glass cover plate and the heat conduction bottom plate is 25mm;

Further, the ratio of the distance between the hollow copper tubes to the tube diameter is 6.25.

Beneficial effects of the utility model: the solar photovoltaic photothermal composite component of the utility model improves the service life of the solar photovoltaic component and the photothermal component, and is a photovoltaic photothermal integrated component with simple structure, convenient installation and low cost. Thermally integrated components can increase the conversion efficiency of photovoltaic cells, as well as the conversion performance of photothermal and photoelectricity, increase the conversion efficiency of solar energy per unit area, increase the efficiency of solar energy utilization, realize the synchronization of solar power generation and hot water, and save space resources.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Fig. 1 is the structural representation of the utility model.

Detailed ways

Fig. 1 is a structural schematic diagram of the present utility model, as shown in the figure: the solar photovoltaic photothermal composite assembly of the present utility model includes a photovoltaic assembly and a photothermal assembly, and the photovoltaic assembly includes a solar photovoltaic battery sheet 1 and its upper surface is sequentially bonded The EVA film layer 2 and the transparent resin protective layer 3 that are arranged next to each other; its lower surface is bonded with a tetrafluoroethylene ETFE film layer 4 and a heat-conducting base plate 6 in sequence, and the tetrafluoroethylene ETFE film layer 4 and the heat-conducting base plate 6 are arranged between Flexible graphite plate 5; the transparent resin protective layer 3 is arranged on the uppermost layer to absorb sunlight, and the ETFE film layer 4 has good light transmittance and weather resistance, is not easy to retain attachments on the surface, has high transparency, light weight, and strong anti-stickiness , Excellent mechanical strength such as penetration resistance, good radiation resistance, can effectively improve aging resistance, corrosion resistance and environmental protection, thereby prolonging the service life of anti-aging solar cell components and improving anti-aging solar cell components The working efficiency is high; the flexible graphite plate 5 is used for heat conduction and plays a buffer role to avoid abrasion or damage caused by the hard contact between the solar photovoltaic cells 1 and the heat conduction base plate 6, and at the same time improve the sealing performance and avoid the temperature of the heat conduction base plate 6 from being too high to improve photoelectric conversion. From top to bottom, the structure consists of transparent resin protective layer 3, EVA film layer 2, solar photovoltaic cell sheet 1, ETFE film layer 4, flexible graphite plate 5, and heat-conducting bottom plate 6, which are bonded by adhesive or heat-sealed. made.

In this embodiment, the photothermal assembly includes a heat collecting tube 7 arranged on the back of the heat conducting bottom plate 6, and a heat insulating back plate 9 is arranged on the outside of the heat collecting tube 7, and the connection between the heat collecting tube 7 and the heat insulating back plate 9 A rubber-plastic insulation layer 8 is arranged between them; the heat-insulating backboard 9 is used to support the heat-collecting tube 7, and the rubber-plastic insulation layer 8 plays the role of a liner to avoid damage to the heat-collecting tube 7 and the heat-insulating backboard 9 due to rigid contact. Simultaneously the rubber-plastic insulation layer 8 can play the effect of further strengthening heat insulation. The outside of the heat collecting tube 7 refers to the lower surface of the heat collecting tube 7 .

In this embodiment, the rubber and plastic insulation layer 8 is provided with a groove for cooperating with the outer surface of the heat collecting tube 7; the outer surface of the heat collecting tube 7 is attached to the inner surface of the groove structure, or the groove structure can also be It is a corrugated surface structure; it is convenient for fixing the heat collecting tube 7, improves the stability and firmness of the heat collecting tube 7, and further strengthens the heat preservation effect.

In this embodiment, the heat collecting tube 7 is a plurality of hollow copper tubes fixed to the heat conduction bottom plate 6 in a parallel manner; the heat collecting tube 7 can be fixed by welding or other fixing methods that can also achieve the purpose of the present invention. The number of copper tubes is preferably 16, and the average thermal efficiency and electrical efficiency are the largest.

In this embodiment, the heat collecting pipe 7 is a serpentine coil; the structure is simple, the compactness is good, and the water flow is large.

In this embodiment, the hollow copper tube is welded and fixed to the heat conduction bottom plate 6, and the heat conduction bottom plate 6 is an aluminum plate; the structure has high strength and good thermal conductivity.

In this embodiment, the transparent resin protective layer 3 is a toughened glass cover plate; the structure has high strength and good light transmission.

In this embodiment, the distance between the tempered glass cover plate and the heat-conducting bottom plate 6 is 25mm; it is beneficial to improve the conversion performance of light-to-heat and light, maximize the increase in light-to-heat and light-to-light conversion rate, and improve thermal efficiency and electrical efficiency.

In this embodiment, the ratio of the distance between the hollow copper tubes to the diameter of the tubes is 6.25; the use of narrow flow channels is also conducive to improving the conversion performance of photothermal and photoelectricity, and maximizing the conversion rate of photothermal and photoelectricity , improve thermal efficiency and electrical efficiency.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the purpose and scope of the technical solutions of the utility model shall be covered by the claims of the utility model.

Claims (9)

1. a photovoltaic and photothermal solar composite component, it is characterized in that: comprise photovoltaic module and photo-thermal assembly, described photovoltaic module comprises solar-energy photo-voltaic cell sheet and surface EVA rete and the transparent resin overcoat of bonding setting successively thereon, its lower surface is bonding tetrafluoroethene ETFE rete and the conductive sole plate of being provided with successively, between described tetrafluoroethene ETFE rete and conductive sole plate, flexible graphite plate is set.

2. photovoltaic and photothermal solar composite component according to claim 1, it is characterized in that: described photo-thermal assembly comprises the thermal-collecting tube that is arranged at the conductive sole plate back side, described thermal-collecting tube arranged outside has heat-insulation and heat-preservation backboard, between described thermal-collecting tube and heat-insulation and heat-preservation backboard, rubber and plastic heat-insulation layer is set.

3. photovoltaic and photothermal solar composite component according to claim 2, is characterized in that: described rubber and plastic heat-insulation layer is provided with for the fixing groove that matches with thermal-collecting tube outer surface.

4. photovoltaic and photothermal solar composite component according to claim 3, is characterized in that: described thermal-collecting tube is the many hollow copper tubings that are fixed on conductive sole plate in the mode being parallel to each other.

5. photovoltaic and photothermal solar composite component according to claim 4, is characterized in that: described thermal-collecting tube is serpentine coil.

6. photovoltaic and photothermal solar composite component according to claim 5, is characterized in that: described hollow copper tubing is fixedly welded on conductive sole plate, described conductive sole plate is aluminium sheet.

7. photovoltaic and photothermal solar composite component according to claim 6, is characterized in that: transparent resin overcoat is toughened glass cover plate.

8. photovoltaic and photothermal solar composite component according to claim 7, is characterized in that: the distance between described toughened glass cover plate and conductive sole plate is 25mm.

9. photovoltaic and photothermal solar composite component according to claim 8, is characterized in that: the tube pitch of described hollow copper tubing from the ratio of its caliber be 6.25.