CN215563951U - Ventilation cavity cooling system of roof photovoltaic board - Google Patents

Abstract

The utility model discloses a ventilation cavity heat dissipation system of a roof photovoltaic panel, which comprises a substrate, a bearing plate, a connecting plate, a photovoltaic module, a ventilation cavity and the like, wherein the ventilation cavity is formed by the structure; the connecting plate is connected with the bearing plate and the substrate, and the connecting plate inclines outwards or is perpendicular to the substrate; the substrate is provided with a spherical convex structure; this system is through the turbulent degree of the structure reinforcing roof photovoltaic ventilation intracavity air flow of strengthening the heat transfer, strengthens the ventilation intracavity air convection heat transfer, and then reduces subassembly operating temperature to promote roof photovoltaic system's generating efficiency, under the radiating prerequisite in the chamber of guaranteeing to ventilate, can further reduce the structure size in chamber of ventilating, thereby reduce the engineering cost of roof photovoltaic project.

Description

Ventilation cavity cooling system of roof photovoltaic board

Technical Field

The utility model belongs to the technical field of photovoltaic power generation, and particularly relates to a ventilation cavity heat dissipation system of a roof photovoltaic panel.

Background

Building integrated photovoltaics are devices that place photovoltaic panels on the roof of a building or as a curtain wall of a building as part of a building. Because the electric power generation device does not occupy extra ground space, the function of a building can be exerted, green electric power can be provided for the building, and the electric power generation device is widely concerned.

In building integrated photovoltaics, the performance of a photovoltaic module is susceptible to the operating temperature of the module. According to statistics, the temperature of the plate surface of the photovoltaic module rises by 1 ℃, and the power generation amount of the module is reduced by 0.2-0.5%. To reduce the operating temperature of the assembly, a vent cavity is typically provided in the back of the assembly to increase the convective heat dissipation from the air in the assembly. On the basis of the above, the conventional method mainly enhances the heat dissipation by optimizing the depth or length of the ventilation cavity.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides a ventilation cavity heat dissipation system of a roof photovoltaic panel, which strengthens the air convection heat transfer at the back of a photovoltaic module through an optimized ventilation cavity heat dissipation structure, thereby reducing the working temperature of the module and further improving the power generation efficiency of the photovoltaic system.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a ventilation chamber cooling system of roof photovoltaic board, includes base plate, connecting plate and photovoltaic module, and the both sides of base plate are connected through connecting plate and photovoltaic module bottom surface and are formed the ventilation chamber.

The bearing plates are arranged on two sides of the base plate, and the photovoltaic modules are connected to the bearing plates through pressing blocks, locking mechanisms or connecting bolts.

The connecting plate is inclined towards the outer side of the ventilation cavity or is perpendicular to the base plate.

And a structure for enhancing heat exchange is arranged on the substrate.

The heat exchange enhancing structure and the base plate are integrally formed.

The heat exchange enhancing structure is a spherical convex structure, and the spherical convex structures are arranged on the substrate in sequence or in staggered arrangement; or the heat exchange enhancing structure is a corrugated convex structure.

The surfaces of the connecting plate and the photovoltaic module back plate are provided with the heat exchange enhancement structure.

The ventilation cavity gradually reduces in flow area from the upwind direction to the downwind direction.

The photovoltaic module back plate is also provided with a hollow cooling plate, the hollow cooling plate is filled with a cooling medium, and the cooling medium is communicated with an underground cooling pipeline.

The hollow cooling plate is also communicated with a tap water supply system, and is made of materials meeting the drinking water standard.

Compared with the prior art, the utility model has at least the following beneficial effects:

according to the ventilation cavity heat dissipation system of the roof photovoltaic panel, the two sides of the base plate are connected with the bottom surface of the photovoltaic module through the connecting plates to form the ventilation cavity, and air in the ventilation cavity can cool the photovoltaic module, so that the temperature of the photovoltaic module is effectively reduced, and the power generation efficiency of the roof photovoltaic system is improved.

Furthermore, the utility model can enhance the turbulence of air flow in the roof photovoltaic ventilation cavity through the spherical convex structure, strengthen the convection heat transfer of air in the ventilation cavity, and further reduce the working temperature of the assembly, thereby improving the power generation efficiency of the roof photovoltaic system.

Furthermore, the spherical bulge structure can further reduce the structural size of the ventilation cavity on the premise of ensuring the heat dissipation of the ventilation cavity, thereby reducing the engineering cost of a roof photovoltaic project.

Further, still set up a cavity cooling plate on the photovoltaic module backplate, pack the cold medium in the cavity cooling plate, cooling medium intercommunication underground cooling pipeline can carry out effective cooling to photovoltaic module through external cooling system.

Further, the cavity cooling plate still communicates running water supply system, the cavity cooling plate adopts the material that accords with the drinking water standard to make, improves the cooling to photovoltaic module greatly under the prerequisite of not showing the incremental cost for its operating temperature keeps in high-efficient state continuously.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic view of a substrate with a spherical convex structure according to the present invention.

Wherein the meanings of the reference symbols are as follows: 1. a substrate; 2. a carrier plate; 3. a connecting plate; 4. a photovoltaic module; 5. and (3) a spherical convex structure.

Detailed Description

The present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, a ventilation cavity heat dissipation system of a roof photovoltaic panel comprises a substrate 1, a connecting plate 3 and a photovoltaic module, wherein two sides of the substrate 1 are connected with the bottom surface of the photovoltaic module through the connecting plate 3 to form a ventilation cavity; the bearing plate 2 is arranged on two sides of the substrate 1, and the photovoltaic module is connected to the bearing plate 2 through a pressing block, a locking mechanism or a connecting bolt.

The connection plate 3 is inclined to the outside of the ventilation chamber or perpendicular to the base plate.

Referring to fig. 2, a structure for enhancing heat exchange is arranged on the substrate 1; the heat exchange enhancing structure and the substrate 1 are integrally formed.

As an alternative embodiment, the heat exchange enhancing structure is a spherical convex structure 5, and the spherical convex structures 5 are arranged on the substrate in an in-line or staggered manner; the heat exchange enhancing structure can also adopt a corrugated convex structure.

The connecting plate 3 and the surface of the photovoltaic module backboard are provided with the structure for enhancing heat exchange.

The ventilation cavity gradually reduces the flow area from the upwind direction to the downwind direction, the air speed is increased, and the cooling effect is improved.

The photovoltaic module back plate is also provided with a hollow cooling plate, the hollow cooling plate is filled with a cooling medium, and the cooling medium is communicated with an underground cooling pipeline; the cooling medium may be water or air.

As another optional embodiment, the hollow cooling plate is also communicated with a tap water supply system, and the hollow cooling plate is made of a material meeting the drinking water standard; the cooling of the photovoltaic module is greatly improved on the premise of not increasing the cost obviously, so that the working temperature of the photovoltaic module is kept in an efficient state continuously.

The size of the spherical convex structure 5 is designed according to the height and the width of the ventilation cavity, the local wind speed and other environmental factors.

The spherical convex structure 5 can be integrally formed with the substrate by forging and pressing the back of the substrate.

Further, the cross section of the spherical convex structure 5 can also be an irregular hemisphere, such as a drop shape, a streamline shape, and the like.

Further, the bearing plate, the connecting plate and the photovoltaic module backboard can be provided with the spherical convex structure 5.

The two sides of the substrate 1 are provided with bearing plates 2, and the photovoltaic module is connected to the bearing plates 2 through pressing blocks, locking mechanisms or connecting bolts; the pressing block and the locking mechanism are all commercially available products.

The working principle of the ventilation cavity heat dissipation system of the roof photovoltaic panel is as follows: the turbulence degree of air flowing in the roof photovoltaic ventilation cavity is enhanced through the spherical convex structures 5, the convection heat transfer of the air in the ventilation cavity is enhanced, and the working temperature of the assembly is further reduced, so that the power generation efficiency of the roof photovoltaic system is improved.

As an optional embodiment, a hollow cooling plate is further arranged on the photovoltaic module back plate, the hollow cooling plate is communicated with a tap water system of a house where the photovoltaic module is located, only a circulating pipeline and a valve of an inlet and an outlet of the hollow cooling plate need to be additionally arranged, in order to facilitate operation, a cooling water inlet and a cooling water outlet of the hollow cooling plate are arranged along the flow direction of tap water, and the cost of the photovoltaic module cannot be obviously increased by the whole device.

When the hollow cooling plate is arranged, the heat conduction layer is coated between the hollow cooling plate and the photovoltaic module back plate.

In another possible embodiment of the utility model, the tap water pipe is connected to a bypass branch pipe, the branch pipe is provided with a valve, and the tail end of the branch pipe is provided with a spray head which can be used for cleaning the surface of the battery of the photovoltaic module periodically.

Of course, cooling water can be arranged, the circulating water pipeline is buried underground, and the photovoltaic component can be cooled by using natural cold energy and only needing to continuously circulate the cooling water by using the circulating pump.

The underground buries the cooling gas pitcher, the export of cooling gas pitcher sets up the force (forcing) pump, and the force (forcing) pump passes through the entry of pipeline intercommunication cavity cooling plate, adopts cooling air to cool off photovoltaic module from the photovoltaic module backplate.

In winter in severe cold areas, the ambient temperature is below 0 ℃, a circulating pump is additionally arranged on cooling water, the cooling water can be changed into anti-freezing circulating water, the solar panel can be activated to generate electricity, and the temperature of the photovoltaic module is not lower than 0 ℃; on the other hand, the cooling water can be used for flushing away ice and snow based on the branch pipes of the circulating water, so that the ice and snow are prevented from covering the battery panel to influence power generation.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides a ventilation chamber cooling system of roof photovoltaic board which characterized in that: the solar photovoltaic module comprises a substrate (1), a connecting plate (3) and a photovoltaic module, wherein the two sides of the substrate (1) are connected with the bottom surface of the photovoltaic module through the connecting plate (3) to form a ventilation cavity.

2. The ventilation cavity heat dissipation system of rooftop photovoltaic panels of claim 1, wherein: the bearing plates (2) are arranged on two sides of the base plate (1), and the photovoltaic modules are connected onto the bearing plates (2) through pressing blocks, locking mechanisms or connecting bolts.

3. The ventilation cavity heat dissipation system of rooftop photovoltaic panels of claim 1, wherein: the connecting plate (3) is inclined towards the outer side of the ventilation cavity or is vertical to the base plate.

4. The ventilation cavity heat dissipation system of rooftop photovoltaic panels of claim 1, wherein: and a structure for enhancing heat exchange is arranged on the substrate (1).

5. The ventilation cavity heat dissipation system of rooftop photovoltaic panels of claim 4, wherein: the heat exchange enhancing structure and the base plate (1) are integrally formed.

6. The ventilation cavity heat dissipation system of rooftop photovoltaic panels of claim 4, wherein: the heat exchange enhancing structure is a spherical convex structure (5), and the spherical convex structures (5) are arranged on the substrate in an in-line or staggered manner; or the heat exchange enhancing structure is a corrugated convex structure.

7. The ventilation cavity heat dissipation system of rooftop photovoltaic panels of claim 4, wherein: the connection plate (3) and the surface of the photovoltaic module backboard are provided with the structure for enhancing heat exchange.

8. The ventilation cavity heat dissipation system of rooftop photovoltaic panels of claim 1, wherein: the ventilation cavity gradually reduces in flow area from the upwind direction to the downwind direction.

9. The ventilation cavity heat dissipation system of rooftop photovoltaic panels of claim 1, wherein: the photovoltaic module back plate is also provided with a hollow cooling plate, the hollow cooling plate is filled with a cooling medium, and the cooling medium is communicated with an underground cooling pipeline.

10. The ventilation cavity heat dissipation system of rooftop photovoltaic panels of claim 1, wherein: the hollow cooling plate is also communicated with a tap water supply system, and is made of materials meeting the drinking water standard.

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