Photovoltaic module with reinforced passive heat dissipation structure

Abstract

The invention discloses a photovoltaic module with an enhanced passive heat dissipation structure, belongs to the technical field of photovoltaic modules, and aims to solve the problem that the photoelectric conversion efficiency of the photovoltaic module is reduced due to temperature rise. The assembly comprises a photovoltaic cell panel assembly, a first fin group and a second fin, wherein each first fin group consists of four parts, namely a first sub-fin, a second sub-fin, a third sub-fin and a fourth sub-fin, the first fin groups are arranged in rows, and the second fins are arranged between the adjacent first fin groups in each row. The photovoltaic module with the enhanced passive heat dissipation structure has the beneficial effects that the photovoltaic module with the enhanced passive heat dissipation structure is reasonable in structure and feasible in technology, heat dissipation can be effectively improved by adopting passive heat transfer modes such as unpowered natural convective heat transfer and radiation heat transfer, autonomous cooling of the photovoltaic module is realized, the photoelectric conversion efficiency of the photovoltaic module is improved, and the service life of the photovoltaic module is prolonged. And the generating capacity of the photovoltaic field station can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a photovoltaic module, in particular to a photovoltaic module with enhanced passive heat dissipation structure. BACKGROUND

[0002] Nowadays, photovoltaic module can only convert part of solar energy into electrical energy after being irradiated by sunlight, and the remaining most of the energy is converted into heat energy, which makes the temperature of the photovoltaic module rise. However, the higher the temperature of the photovoltaic module, the lower the photoelectric conversion efficiency, therefore, it is of great significance to rely on some passive ways to reduce the temperature of the photovoltaic module without consuming any power, so as to improve the power generation efficiency within the service life of the photovoltaic panel. The industry urgently needs a photovoltaic module with enhanced passive heat dissipation structure, which couples natural convection and radiation to dissipate the heat energy generated after the photovoltaic module absorbs solar energy to the surrounding environment, thereby reducing its own temperature and improving the photoelectric conversion efficiency. SUMMARY

[0003] The main purpose of the present application is to reduce the temperature of the photovoltaic module without consuming any power and improve the power generation efficiency, and provide a photovoltaic module with enhanced passive heat dissipation structure.

[0004] The photovoltaic module with enhanced passive heat dissipation structure provided by the present application comprises a photovoltaic cell panel assembly, a first rib group and a second rib, wherein the first rib group is arranged in rows on the back of the photovoltaic cell panel assembly, and the second rib is arranged between each row of adjacent first rib groups.

[0005] The photovoltaic cell panel assembly is divided into three layers, wherein the top layer is super white embossed tempered glass, the bottom layer is PET plate, and the photovoltaic cell is arranged in the middle, and the photovoltaic cell is bonded with the tempered glass and the PET plate through EVA glue.

[0006] The first rib group is divided from a first rib group assembly, and the first rib group assembly is generated by a center-symmetric rhombic shield-shaped convex circular-arc-shaped curved surface with a certain height, the orthographic projection (perpendicular to the back direction of the photovoltaic cell panel assembly) of the curved surface is rhombic, the rhombic structure is left-right symmetric, the distance between the lower vertex and the left and right vertices of the rhombic is 3 times the distance between the upper vertex and the left and right vertices, the left and right vertices and the lower vertex are connected by straight line segments, and the connecting line between the left and right vertices and the upper vertex is concave arc-shaped, the rhombic curved surface is convex circular-arc-shaped, and the diameter of the circular arc is the length of the line segment connecting the two left and right vertices of the rhombic.

[0007] The first rib group is composed of four parts, i.e., a first sub-rib, a second sub-rib, a third sub-rib and a fourth sub-rib. The first rib group is vertically cut along the central axis into two parts in the orthographic projection direction. The two parts are further cut along the lines connecting the left and right vertices of the rhombus to the center of the rhombus, respectively, to form the four sub-ribs of the first rib group. The upper left part is the first sub-rib, the upper right part is the second sub-rib, the lower left part is the third sub-rib, and the lower right part is the fourth sub-rib. The flow passage formed by the two edges of the first sub-rib and the second sub-rib adjacent to each other is the first flow passage. The flow passages formed by the two edges of the first sub-rib and the third sub-rib, the second sub-rib and the fourth sub-rib, and the third sub-rib and the fourth sub-rib adjacent to each other are the second flow passage, the third flow passage and the fourth flow passage, respectively. The flow sections of all the flow passages gradually decrease from bottom to top. The extensions of the left and right edges of each flow passage intersect at a point far away.

[0008] The four sub-ribs of the first rib group are dispersedly arranged. A large number of first rib groups with the same structure are closely arranged in rows on the back of the photovoltaic cell panel assembly and are staggered. The angle between the edge a of the first sub-rib and the horizontal line is α, and the angle between the edge b of the second sub-rib and the horizontal line is (180°-α). The third sub-rib and the fourth sub-rib satisfy the feature that the central line formed by the edges of the bottom of each rib is perpendicular to the horizontal line. The material of the first rib group is a metal with high thermal conductivity, such as aluminum.

[0009] The second rib is composed of three parts. From the orthographic projection direction, the three parts are closely connected by two 90° arc rib end points and a vertical rectangular rib placed at the connection, and are closely fitted together. The end points of the two arcs coincide on the same horizontal line. The second rib base is also closely arranged in rows on the back of the photovoltaic cell panel assembly. The surface of the second rib presents a hollow circular structure as a whole. The hollow circular structures are staggered and uniformly distributed on the surface of the second rib. The material of the second rib is a metal with high thermal conductivity, such as aluminum.

[0010] The second rib is arranged between adjacent first rib groups in each row. The arrangement condition satisfies that the airflow flowing through the second flow passage or the third flow passage in the first rib group is directed to the midpoint position of one of the arcs of the second rib.

[0011] The surfaces of the first rib group and the second rib are sprayed with a selective absorption film, such as a photonic crystal multilayer film composed of SiO2, HfO2 and silver film.

[0012] A support is installed between the photovoltaic cell panel assembly and the ground.

[0013] The installation inclination angle of the photovoltaic cell panel assembly is β. The angle β is set to be an angle at which the photovoltaic cell panel assembly can obtain the maximum annual total solar radiation on the installation site.

[0014] The working principle of the present application:

[0015] The photovoltaic cell panel assembly with the reinforced passive heat dissipation structure provided by the present application is used first to determine the installation inclination angle β of the photovoltaic cell panel assembly according to the angle for obtaining the maximum annual average total solar radiation, and to determine the installation support according to the installation inclination angle β.

[0016] When the photovoltaic cell panel assembly is irradiated by sunlight, only part of the solar energy can be converted into electric energy, and the remaining most of the energy is converted into heat energy, which makes the temperature of the photovoltaic cell panel assembly rise. Since the entire back plate of the photovoltaic cell panel assembly is provided with a plurality of first rib groups and second ribs, the generated heat energy is transmitted to the surrounding environment through the natural convection and radiation heat exchange of the first rib group and the second rib, thereby greatly reducing the temperature of the photovoltaic cell panel assembly and improving the photoelectric conversion efficiency.

[0017] The heat transfer mode between the first fin group and the surrounding environment mainly includes natural convection and radiation heat transfer. Since the outer surface of the first fin group has a curvature, the heat dissipation area can be effectively increased, and the angular coefficient of the radiation heat transfer between the first fin group and the surrounding environment can be improved, so that the radiation heat transfer effect between the first fin group and the surrounding environment is enhanced. Since the first fin group is in close contact with the photovoltaic cell panel assembly, when the photovoltaic cell panel assembly is irradiated by sunlight, the temperature of the photovoltaic cell panel assembly rises significantly, and the heat energy is transferred to the first fin group. The heated air gradually becomes smaller in density and gradually increases in buoyancy. The heated air rises from the bottom of the first fin group. When the air flows through the contraction passage, the flow cross section gradually decreases, and continuous acceleration occurs. The flow velocity increases significantly, and the static pressure drops rapidly. This geometric compression not only increases the kinetic energy of the air, but also makes the main flow flow closer to the wall, thereby compressing and weakening the thickness of the thermal boundary layer. In the process of air adhesion to the wall, the stable development of the thermal boundary layer is broken, and a periodic "boundary layer - reattachment - boundary layer" cycle is formed, which greatly enhances the local convective heat transfer. On the other hand, the flow shear gradient and velocity gradient in the reduced area increase rapidly, inducing micro-scale vortices and transient disturbances, further enhancing the coupling transmission efficiency of heat and momentum. In addition, a low-pressure induction zone may be formed at the end of the contraction passage, providing a self-driven induction mechanism for the entire flow field, and constructing a stable and efficient thermal plume in the natural convection system. When part of the air flows through the outer surface of each sub-fin of the first fin group, a three-section composite disturbance of "top arc guide + double-wing disturbance + conical layer breaking" is formed. The curvature of the outer surface can effectively induce local vortices, break and reconstruct the thermal boundary layer, and further enhance the disturbance of the natural convection flow boundary layer, thereby significantly enhancing the convective heat transfer. Overall, the natural convection boundary layer formed on the surface of the first fin group on the back of the photovoltaic cell panel assembly develops in sections, and the average thickness of the boundary layer is relatively thin due to the influence of part of the local vortices. Since the thickness of the boundary layer is the main inducing factor affecting the natural convection heat transfer effect, the thinner boundary layer reduces the natural convection heat transfer resistance between the first fin group and the surrounding air, and strengthens the convective heat transfer between them. As described above, the natural convection and radiation heat transfer of the first fin group can be significantly enhanced, so the temperature of the photovoltaic cell panel assembly can be effectively reduced.

[0018] The second fin is arranged between adjacent first fin groups in each row, and the arrangement satisfies that the airflow flowing through the second flow passage or the third flow passage in the first fin group is directed to the midpoint position of one of the arcs of the second fin. The installation form of the second fin helps the natural convection and radiation heat transfer between the second fin and the surrounding environment.

[0019] The heat transfer mode of the second fin with the surrounding environment mainly includes natural convection and radiation heat exchange, and the working process is as follows: the second fin is combined in a mode of "rectangular base plate+double-sided semicircular groove+arrayed perforation" to construct a three-dimensional reinforced convection with flow guiding and local penetrating disturbance capability on the back of the photovoltaic panel assembly, the second fin obtains heat from the photovoltaic panel assembly in a heat conduction mode to make the temperature of the second fin higher than the temperature of the surrounding environment, the air around the second fin is guided and accelerated by the semicircular groove in the natural floating process, and is lifted along the surface of the fin, and the perforation structure induces up-and-down penetrating micro-jet flow to form periodic transverse disturbance, excite small-scale shear vortex inside the flow field, significantly destroy the stability of the thermal boundary layer, and greatly enhance the flow characteristics of the thermal plume and the local convection heat exchange capability, on one hand, the air around the second fin acts on the second fin, and on the other hand, from the overall arrangement, the air flow flowing through the second flow channel and the third flow channel is divided into two parts along the left and right parts of the surface of the fin, one part of the air flow is guided to the side of the first sub-fin and the second sub-fin in the first fin group, the fin utilization rate of the first fin group is improved, and the natural convection of the part is also enhanced, and the other part acts on the second fin itself to affect the stability of the thermal boundary layer.

[0020] The surface of the first fin group and the second fin is sprayed with a selective absorption material, for example, a photonic crystal multilayer film composed of SiO2, HfO2 and silver film, the material has high emissivity to the surrounding environment, so that the heat radiation capability of the first fin group and the second fin to the surrounding environment is enhanced, the material has low absorption rate to the surrounding environment, and the absorption heat radiation of the first fin group and the second fin to the surrounding environment can be effectively reduced, so that the first fin group and the second fin are in a heat radiation loss state, and can effectively absorb the heat generated from the photovoltaic panel assembly to reduce the temperature of the photovoltaic panel assembly.

[0021] Advantages of the application:

[0022] The photovoltaic panel assembly structure with the reinforced passive heat dissipation structure provided by the application is reasonable in structure and feasible in technology, the passive heat transfer modes such as natural convection heat transfer and radiation heat exchange can effectively increase the heat dissipation of the photovoltaic panel assembly and the surrounding environment, realize passive and autonomous cooling of the photovoltaic panel assembly, improve the photoelectric conversion efficiency, help to improve the power generation capacity of the photovoltaic power station, and therefore have strong application value. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a front view structural diagram of the back of the photovoltaic panel assembly.

[0024] Figure 2Figure 1 is a schematic diagram of a first rib group according to the present application.

[0025] Figure 3 Figure 2 is a schematic diagram of a first rib group assembly structure according to the present application.

[0026] Figure 4 Figure 3 is a front view of a first rib group assembly according to the present application.

[0027] Figure 5 Figure 4 is a left view of a first rib group assembly according to the present application.

[0028] Figure 6 Figure 5 is a top view of a first rib group assembly according to the present application.

[0029] Figure 7 Figure 6 is a schematic diagram of a first rib group structure according to the present application.

[0030] Figure 8 Figure 7 is a front view of a first rib group according to the present application.

[0031] Figure 9 Figure 8 is a left view of a first rib group according to the present application.

[0032] Figure 10 Figure 9 is a top view of a first rib group according to the present application.

[0033] Figure 11 Figure 10 is a schematic diagram of a second rib structure according to the present application.

[0034] Figure 12 Figure 11 is a front view of a second rib according to the present application.

[0035] Figure 13 Figure 12 is a left view of a second rib according to the present application.

[0036] Figure 14 Figure 13 is a top view of a second rib according to the present application.

[0037] Figure 15 Figure 14 is a schematic diagram of a photovoltaic cell panel assembly installation state test structure according to the present application.

[0038] Figure 16 Figure 15 is a schematic diagram of a photovoltaic cell panel assembly installation state rear view structure according to the present application.

[0039] Reference signs are explained as follows:

[0040] 1. photovoltaic cell panel assembly; 2. first rib group (2.1. first sub-rib; 2.2. second sub-rib; 2.3. third sub-rib; 2.4. fourth sub-rib) 3. second rib;

[0041] 4. ground; 5. support. DETAILED DESCRIPTION

[0042] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. Please refer to Figures 1 to 7 the drawings:

[0043] The present application provides a photovoltaic module with enhanced passive heat dissipation structure, which comprises a first rib group 2 and a second rib 3 of a photovoltaic cell panel assembly 1, wherein the first rib group 2 is arranged in rows on the back of the photovoltaic cell panel assembly 1, and the second rib 3 is arranged between adjacent first rib groups 2 in each row.

[0044] The photovoltaic cell panel assembly 1 is divided into a three-layer structure, wherein the top layer is super-white embossed tempered glass, the bottom layer is a PET plate, and the photovoltaic cell is arranged in the middle. The photovoltaic cell is bonded with the tempered glass and the PET plate through EVA glue.

[0045] The first rib group 2 is divided from a first rib assembly, and the first rib assembly is generated by a center-symmetric rhombic shield-shaped convex circular-arc curved surface with a certain height, as shown in Figure 3 , Figure 4 , Figure 5 , Figure 6 , the orthographic projection (perpendicular to the direction of the back of the photovoltaic cell panel assembly) of the curved surface is a rhombus, the rhombus is a left-right symmetric structure, the distance from the lower C vertex to the left and right A, B vertexes is 3 times the distance from the upper vertex to the left and right A, B vertexes, the left and right A, B vertexes and the lower C vertex are connected by straight line segments, and the connecting line between the left and right A, B vertexes and the upper vertex is in a concave arc shape. The rhombic curved surface is in a convex circular arc shape, and the diameter of the circular arc is the length of the line segment connecting the left and right A, B vertexes of the rhombus.

[0046] The first rib group 2 is composed of four parts: a first sub-rib 2.1, a second sub-rib 2.2, a third sub-rib 2.3, and a fourth sub-rib 2.4, as shown in Figure 7 , the first rib assembly is vertically cut into two parts along the center axis in the orthographic projection direction, and the left and right two parts are cut along the connecting line between the left and right two vertexes A, B of the rhombus and the middle point D of the rhombus in the orthographic projection direction, respectively, to form four sub-ribs of the first rib group. The left upper part is the first sub-rib 2.1, the right upper part is the second sub-rib 2.2, the left lower part is the third sub-rib 2.3, and the right lower part is the fourth sub-rib 2.4. The flow passage formed by the two adjacent edges of the first sub-rib 2.1 and the second sub-rib 2.2 is the first flow passage, the flow passages formed by the two adjacent edges of the first sub-rib 2.1 and the third sub-rib 2.3, the second sub-rib 2.2 and the fourth sub-rib 2.4, and the third sub-rib 2.3 and the fourth sub-rib 2.4 are the second flow passage, the third flow passage, and the fourth flow passage, respectively. The flow cross-section of all flow passages gradually decreases from bottom to top, and the extension lines of the left and right two edges of each flow passage intersect at a distant point.

[0047] The four sub-rib plates of the first rib plate group 2 are dispersedly arranged, and a large number of first rib plate group 2 bases with the same structure are closely arranged on the back of the photovoltaic cell panel assembly and are staggered, wherein the first sub-rib plate 2.1a is at an angle of α with the horizontal line, the second sub-rib plate 2.2b is at an angle of (180°-α) with the horizontal line, and the third sub-rib plate 2.3 and the fourth sub-rib plate 2.4 satisfy the feature that the center line formed by the edges of the bottoms of the rib plates is perpendicular to the horizontal line, as shown in Figure 7 、 Figure 8 The material of the first rib plate group 2 is a metal with high thermal conductivity, for example, aluminum with a thermal conductivity of 237 W / (m·K).

[0048] The second rib plate 3 is divided into three parts, and from the perspective of the front projection direction, the two 90° arc rib plate end points are closely connected and a vertical rectangular rib plate is placed at the connection, which are closely matched to form a whole, and the two arc end points of the second rib plate 3 coincide on the same horizontal line, as shown in Figure 12 The second rib plate 3 base is also closely arranged on the back of the photovoltaic cell panel assembly 1, and the surface of the second rib plate 3 as a whole presents a hollow circular structure, the hollow circular structure is staggered and uniformly distributed on the surface of the second rib plate 3, and the material of the second rib plate 3 is a metal with high thermal conductivity, for example, aluminum with a thermal conductivity of 237 W / (m·K).

[0049] The second rib plate 3 is arranged in the middle of each row of adjacent first rib plate groups 2, and the arrangement condition satisfies that the airflow flowing through the second flow channel or the third flow channel in the first rib plate group 2 points to the midpoint position of one of the arcs of the second rib plate 3.

[0050] The surfaces of the first rib plate group 2 and the second rib plate 3 are sprayed with a selective absorption film, for example, a photonic crystal multilayer film composed of SiO2, HfO2 and silver film.

[0051] A support 5 is installed between the photovoltaic cell panel assembly 1 and the ground 4.

[0052] The installation inclination angle of the photovoltaic cell panel assembly 1 is β, and the β angle is set to be an angle at which the photovoltaic cell panel assembly 1 can obtain the maximum annual average total solar radiation on the installation ground.

[0053] The working principle of the application is as follows:

[0054] The photovoltaic cell panel assembly 1 with the reinforced passive heat dissipation structure provided by the application is used, first, the installation inclination angle β of the photovoltaic cell panel assembly 1 is determined according to the angle at which the maximum annual average total solar radiation is obtained, and the installation support 5 is determined according to the installation inclination angle β.

[0055] When the photovoltaic panel assembly 1 is irradiated by sunlight, only part of the solar energy can be converted into electrical energy, and the remaining part is converted into heat energy, which makes the temperature of the photovoltaic panel assembly 1 rise. Since the entire back plate of the photovoltaic panel assembly 1 is provided with a plurality of first rib groups 2 and second ribs 3, the generated heat energy is transferred to the surrounding environment by the first rib group 2 and the second rib 3 through natural convection and radiation heat exchange, thereby greatly reducing the temperature of the photovoltaic panel assembly 1 and improving the photoelectric conversion efficiency.

[0056] The heat transfer mode between the first rib group 2 and the surrounding environment mainly includes natural convection and radiation heat transfer. Since the outer surface of the first rib group 2 has a curvature, the heat dissipation area can be effectively increased, and the angular coefficient of radiation heat transfer to the surrounding environment can be improved, so that the radiation heat transfer effect between the first rib group 2 and the surrounding environment is enhanced. Since the first rib group 2 is in close contact with the photovoltaic panel assembly 1, when the photovoltaic panel assembly 1 is irradiated by sunlight, the temperature of the photovoltaic panel assembly 1 rises significantly, and the heat energy is transferred to the first rib group 2. The density of the heated air around the first rib group 2 gradually decreases, and the buoyancy gradually increases. The heated air rises from the bottom of the first rib group 2. When the air flows through the contraction channel, the flow section gradually decreases, and continuous acceleration occurs. The flow velocity increases significantly, and the static pressure drops rapidly. This geometric compression not only increases the kinetic energy of the air, but also makes the main flow flow closer to the wall, thereby compressing and weakening the thickness of the thermal boundary layer. In the process of air flow adhering to the wall, the stable development of the thermal boundary layer is broken, forming a periodic "boundary layer - reattachment - boundary layer" cycle, which greatly enhances the local convective heat transfer. On the other hand, the flow shear gradient and velocity gradient in the narrowed area increase rapidly, inducing micro-scale vortices and transient disturbances, further strengthening the coupling transmission efficiency of heat and momentum. In addition, a low-pressure induction zone may be formed at the end of the contraction channel, providing a self-driven induction mechanism for the entire flow field, and constructing a stable and efficient thermal plume in the natural convection system. When part of the air flows through the outer surface of each sub-rib of the first rib group 2, a three-section composite disturbance of "top arc guide + double-wing disturbance + conical layer breaking" is formed. The curvature of the outer surface can effectively induce local vortices, break and reconstruct the thermal boundary layer, and further enhance the disturbance of the natural convection flow boundary layer, thereby significantly enhancing the convective heat transfer. Overall, the natural convection boundary layer formed on the surface of the first rib group 2 on the back of the photovoltaic panel assembly 1 develops in segments, and the average thickness of the boundary layer is relatively thin due to the influence of part of the local vortices. Since the thickness of the boundary layer is the main inducing factor affecting the heat transfer effect of natural convection, the thinner boundary layer reduces the natural convection heat transfer resistance between the first rib group 2 and the surrounding air, and strengthens the convective heat transfer between them. As described above, the natural convection and radiation heat transfer of the first rib group 2 can be significantly enhanced, thereby effectively reducing the temperature of the photovoltaic panel assembly 1.

[0057] The second fin 3 is arranged between each row of adjacent first fin groups 2, and the air flow in the second flow channel or the third flow channel in the first fin group 2 flows towards the midpoint of one of the arcs of the second fin 3. The installation of the second fin 3 in this way and the geometric relationship between the photovoltaic cell panel assembly and the first fin group 2 help the natural convection and radiation heat exchange between the second fin 3 and the surrounding environment.

[0058] The heat transfer between the second fin 3 and the surrounding environment is mainly natural convection and radiation heat exchange. The working process is as follows: the second fin 3, through the combination of the "rectangular base plate + double-sided semicircular groove + arrayed perforation", constructs a three-dimensional reinforced convection with flow guiding and local penetrating disturbance ability on the back of the photovoltaic cell panel assembly 1. The second fin 3 obtains heat from the photovoltaic cell panel assembly 1 in a heat-conducting manner, so that its temperature is higher than that of the surrounding environment. The air around the second fin 3 is guided and accelerated by the semicircular groove during the natural floating process, and rises along the surface of the fin. At the same time, the perforation structure induces up-and-down penetrating micro-jet flow, forms periodic transverse disturbance, excites small-scale shear vortex inside the flow field, significantly destroys the stability of the thermal boundary layer, and greatly enhances the flow characteristics of the thermal plume and improves the local convective heat transfer capacity. On the one hand, the air around the second fin 3 acts on it, and on the other hand, from the overall arrangement, the air flow in the second flow channel and the third flow channel flows towards the midpoint of one of the arcs of the second fin 3, and the air flow is divided into two parts along the left and right sides of the fin surface. One part of the air flow is guided to the side of the first sub-fin 2.1 and the second sub-fin 2.2 in the first fin group 2, which improves the fin utilization rate and enhances the natural convection in this part. The other part acts on the second fin 3 itself, affecting the stability of the thermal boundary layer. In summary, the natural convection and radiation heat transfer of the second fin 3 can be significantly enhanced, so the temperature of the photovoltaic cell panel assembly 1 can be effectively reduced.

[0059] The surfaces of the first fin group 2 and the second fin 3 are sprayed with a selective absorption material, such as a photonic crystal multilayer film composed of SiO2, HfO2, and silver film. This material has high emissivity to the surrounding environment, so the first fin group 2 and the second fin 3 have enhanced thermal radiation ability to the surrounding environment. This material has low absorptivity to the surrounding environment, which can effectively reduce the absorption of thermal radiation from the surrounding environment by the first fin group 2 and the second fin 3. Therefore, the first fin group 2 and the second fin 3 are in a thermal radiation deficit state, which can effectively absorb the heat generated from the photovoltaic cell panel assembly 1, thereby reducing the temperature of the photovoltaic cell panel assembly 1.

[0060] The above detailed description does not limit the scope of the application. Various modifications, combinations, sub-combinations and alternatives can be made to the detailed description. Any modification, equivalent replacement and improvement etc. made within the spirit and principle of the application shall be included in the scope of the application.

Claims

1. A photovoltaic module having a reinforced passive thermal dissipation structure, characterized by: The photovoltaic panel assembly comprises a photovoltaic panel assembly, a first rib group and a second rib. The first rib group is arranged in rows on the back of the photovoltaic panel assembly, and a plurality of second ribs are arranged between adjacent first rib groups in each row.

2. A photovoltaic module with enhanced passive thermal dissipation structure according to claim 1, characterized in that: The photovoltaic panel assembly is divided into three layers, wherein the top layer is super white embossed tempered glass, the bottom layer is PET plate, and the photovoltaic cell is arranged in the middle. The photovoltaic cell is bonded with the tempered glass and the PET plate through EVA glue.

3. The photovoltaic module with enhanced passive heat dissipation structure according to claim 1, wherein: The first rib group is divided from the first rib group assembly, and the first rib group assembly is generated by pulling out a certain height from a center-symmetric rhombic shield-shaped convex circular-arc-shaped curved surface. The orthogonal projection of the curved surface is a rhombus, the rhombus is left-right symmetric structure, the distance between the lower vertex and the left and right vertexes of the rhombus is 3 times the distance between the upper vertex and the left and right vertexes, the left and right vertexes and the lower vertex are connected by straight line segments, and the connecting line between the left and right vertexes and the upper vertex is concave arc-shaped. The rhombic curved surface is convex circular-arc-shaped, and the diameter of the circular arc is the length of the line segment connecting the left and right vertexes of the rhombus.

4. The photovoltaic module with enhanced passive thermal dissipation structure of claim 1, wherein: The first rib group is composed of four parts: the first sub-rib, the second sub-rib, the third sub-rib and the fourth sub-rib. The first rib group assembly is vertically cut into two parts along the center axis in the orthogonal projection direction. The left and right parts are cut along the connecting lines between the left and right vertexes of the rhombus and the middle point of the rhombus in the orthogonal projection direction, respectively, to form four sub-ribs of the first rib group. The left upper part is the first sub-rib, the right upper part is the second sub-rib, the left lower part is the third sub-rib, and the right lower part is the fourth sub-rib. The flow passage formed by the two adjacent edges of the first sub-rib and the second sub-rib is the first flow passage. The flow passages formed by the two adjacent edges of the first sub-rib and the third sub-rib, the second sub-rib and the fourth sub-rib, and the third sub-rib and the fourth sub-rib are the second flow passage, the third flow passage and the fourth flow passage, respectively. The flow section of all flow passages gradually decreases from bottom to top, and the extension lines of the left and right edges of each flow passage intersect at a distant point.

5. The photovoltaic module with enhanced passive thermal dissipation structure of claim 1, wherein: The four sub-ribs of the first rib group are arranged dispersedly, and a large number of first rib groups with the same structure are closely arranged in rows on the back of the photovoltaic assembly. The angle between the a edge of the first sub-rib and the horizontal line is α, the angle between the b edge of the second sub-rib and the horizontal line is (180°-α), and the angles between the third sub-rib and the fourth sub-rib satisfy the feature that the center line formed by the angles between the bottom edges of the ribs is perpendicular to the horizontal line. The material of the first rib group is high-thermal-conductivity metal.

6. The photovoltaic module with enhanced passive thermal dissipation structure of claim 1, wherein: The second rib is divided into three parts, which are tightly connected by two 90° circular arc rib end points and a vertical rectangular rib placed at the connection. The three parts are tightly fitted to form a whole, and the end points of the two circular arcs coincide on the same horizontal line. The second rib base is also closely arranged in rows on the back of the photovoltaic assembly. The surface of the second rib presents a hollow circular structure as a whole, and the hollow circular structures are distributed on the surface of the second rib in a staggered and uniform manner. The material of the second rib is high-thermal-conductivity metal.

7. The photovoltaic module with enhanced passive thermal dissipation structure of claim 1, wherein: The second fin is arranged between each row of adjacent first fin groups, and the arrangement satisfies that the air flow of the second flow passage or the third flow passage in the first fin group flows to the midpoint of one of the circular arcs of the second fin.

8. The photovoltaic module with enhanced passive thermal dissipation structure of claim 1, wherein: The surface of the first fin group and the second fin is sprayed with a selective absorption film.

9. The photovoltaic module with enhanced passive thermal dissipation structure of claim 1, wherein: A support is installed between the photovoltaic panel assembly and the ground.

10. The photovoltaic module with enhanced passive thermal dissipation structure of claim 9, wherein: The installation inclination angle of the photovoltaic panel assembly is β, and the β angle is set to an angle at which the photovoltaic assembly can obtain the maximum annual average total solar radiation on the installation ground.

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