Vertical solar energy system

Abstract

The present application discloses a vertical solar energy system, the vertical solar energy system comprising at least one vertical solar energy unit. The vertical solar energy unit comprises a bifacial photovoltaic element and a reflective element, wherein the bifacial photovoltaic element is arranged in a direction perpendicular to a mounting surface. The reflective element is configured for being disposed on a side of the bifacial photovoltaic element close to the mounting surface. The bifacial photovoltaic element has at least two bifacial photovoltaic wafer strips connected in parallel, and the at least two bifacial photovoltaic wafer strips are located at different positions in a height direction. In addition, under the same light intensity, of the at least two bifacial photovoltaic wafer strips, a voltage of the bifacial photovoltaic wafer strip at a higher position is higher than a voltage of the bifacial photovoltaic wafer strip at a lower position in the height direction. On the one hand, vertically mounted bifacial photovoltaic elements have a stronger ability to resist dust accumulation, ice, snow, and hail, and help to reduce costs. On the other hand, a differential layout of voltages of bifacial photovoltaic wafer strips in a height direction is beneficial to improving vertical solar energy system power generation efficiency.

Description

A vertical solar energy system Technical Field

[0001] This application relates to the field of solar photovoltaic system technology, specifically to a vertical solar energy system. Background Technology

[0002] Most current solar power systems are installed at an angle. The main advantage of this method is that the tilt angle of the photovoltaic panels can be adjusted according to latitude, resulting in a higher solar energy conversion efficiency. However, tilted solar systems also have many disadvantages, such as poor resistance to dust accumulation, snow, and hail. Furthermore, as the cost of photovoltaic panels decreases, the cost of the mounting brackets increases, and the mounting brackets for tilted installations are relatively expensive. Although many proposals for vertical solar systems have been made, previous vertical solar systems primarily relied on single-sided sunlight, and their power generation efficiency was heavily dependent on the angle of sunlight. Therefore, there is an urgent need for a vertically installed solar system with higher power generation efficiency. Summary of the Invention

[0003] The main objective of this invention is to provide a vertically installed solar energy system with higher power generation efficiency.

[0004] In a first aspect, one embodiment provides a vertical solar energy system, including at least one vertical solar energy device, the vertical solar energy device including a bifacial photovoltaic element and a reflector, the bifacial photovoltaic element being mounted on a mounting surface and being arranged in a direction perpendicular to the mounting surface; the reflector being disposed on the side of the bifacial photovoltaic element close to the mounting surface;

[0005] The bifacial photovoltaic device has at least two parallel bifacial photovoltaic wafer strips, and the at least two bifacial photovoltaic wafer strips are located at different positions in the height direction. The bifacial photovoltaic wafer strips are used to receive and convert sunlight on two mutually opposite surfaces of the bifacial photovoltaic device.

[0006] Furthermore, under the same light intensity, among at least two bifacial photovoltaic wafer strips, the bifacial photovoltaic wafer strip with the higher position in the height direction has a higher voltage than the bifacial photovoltaic wafer strip with the lower position.

[0007] In one embodiment, the width of the higher bifacial photovoltaic wafer strip in the height direction is greater than the width of the lower bifacial photovoltaic wafer strip.

[0008] In one embodiment, each of the bifacial photovoltaic wafer strips includes a plurality of wafers connected in series, and the number of wafers in the bifacial photovoltaic wafer strips located at higher positions in the height direction is greater than the number of wafers in the bifacial photovoltaic wafer strips located at lower positions.

[0009] In one embodiment, the double-sided photovoltaic wafer strip is arranged along a horizontal direction perpendicular to the height direction.

[0010] In one embodiment, the vertical solar panels are configured in multiple ways, and the multiple vertical solar panels are arranged side by side.

[0011] In one embodiment, the plurality of vertical solar panels arranged side by side include at least two vertical solar panels of different heights, and / or, the plurality of vertical solar panels arranged side by side include at least two vertical solar panels of different spans in the horizontal direction.

[0012] In one embodiment, a closed cavity is further included, which is at least partially transparent and is used to enclose at least one of the bifacial photovoltaic element and the reflector.

[0013] In one embodiment, the enclosed cavity is capable of containing a cooling medium, which includes at least one of a transparent liquid and a gas.

[0014] In one embodiment, the enclosed cavity is provided with a connecting pipe, which connects the enclosed cavity to the outside world for heat exchange with the external medium.

[0015] In one embodiment, the reflector is configured as at least one of a curved mirror and a reflective Fresnel lens, the reflective Fresnel lens including a liquid reflective Fresnel lens.

[0016] According to the above embodiment, the vertical solar energy system includes at least one vertical solar energy device. The vertical solar energy device includes a bifacial photovoltaic element and a reflector. The bifacial photovoltaic element is mounted on a mounting surface and is arranged in a direction perpendicular to the mounting surface. The reflector is disposed on the side of the bifacial photovoltaic element closest to the mounting surface. The bifacial photovoltaic element has at least two parallel bifacial photovoltaic wafer strips, and these at least two bifacial photovoltaic wafer strips are located at different positions in the height direction. The bifacial photovoltaic wafer strips are used to receive and convert sunlight on two mutually opposing surfaces of the bifacial photovoltaic element. Under the same light intensity, among the at least two bifacial photovoltaic wafer strips, the voltage of the bifacial photovoltaic wafer strip located higher in the height direction is higher than the voltage of the bifacial photovoltaic wafer strip located lower. On the one hand, dust, snow, hail, etc., are less likely to accumulate on the vertically installed bifacial photovoltaic element, making it more resistant to dust accumulation, snow, and hail. On the other hand, the cost requirements for the mounting bracket are lower, thus helping to reduce the cost of the vertical solar energy system. On the other hand, because bifacial photovoltaic (PV) devices have bifacial photovoltaic wafer strips, both of the opposing surfaces of the device can receive and convert sunlight, increasing the area that can receive and convert sunlight and the daily power generation time. Due to the reflector installed at the bottom, the light intensity is generally higher at lower elevations in vertical solar systems. Therefore, configuring bifacial photovoltaic wafer strips with higher voltage at higher elevations for the same light intensity is beneficial for optimizing photoelectric conversion efficiency, all of which contribute to improving the power generation efficiency of vertical solar systems. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the structure of the vertical solar energy system in the first embodiment of this application;

[0018] Figure 2 is a schematic diagram of the vertical solar energy system in the second embodiment of this application;

[0019] Figure 3 is a schematic diagram of the vertical solar energy system in the third embodiment of this application;

[0020] Figure 4 is a schematic diagram of the vertical solar energy system in the fourth embodiment of this application;

[0021] Figure 5 is a schematic diagram of the vertical solar energy system in the fifth embodiment of this application;

[0022] Reference numerals: 100, double-sided photovoltaic element; 110, double-sided photovoltaic wafer strip; 111, first double-sided photovoltaic wafer strip; 112, second double-sided photovoltaic wafer strip; 113, third double-sided photovoltaic wafer strip; 120, wafer; 200, reflector; 210, curved reflector; 220, liquid-reflective Fresnel lens; 221, liquid Fresnel lens; 222, reflecting surface; 300, enclosed cavity; 310, transparent surface; 320, bottom cover; 330, cooling medium; 340, connecting pipe; 341, pipe opening. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of this application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to this application are not shown or described in the specification. This is to avoid obscuring the core parts of this application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0024] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0025] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0026] This embodiment provides a vertical solar energy system.

[0027] Please refer to Figures 1-5. This vertical solar system includes at least one vertical solar panel.

[0028] Referring to Figures 1-3, the vertical solar panel includes a bifacial photovoltaic element 100 and a reflector 200. The bifacial photovoltaic element 100 is mounted on a mounting surface and is arranged perpendicular to the mounting surface. The reflector 200 is disposed on the side of the bifacial photovoltaic element 100 closest to the mounting surface. The bifacial photovoltaic element 100 has at least two parallel bifacial photovoltaic wafer strips 110, which are located at different positions in the height direction. The bifacial photovoltaic wafer strips 110 receive and convert sunlight on two mutually opposite surfaces of the bifacial photovoltaic element 100. Under the same light intensity, among the at least two bifacial photovoltaic wafer strips 110, the one positioned higher in the height direction has a higher voltage than the one positioned lower.

[0029] On the one hand, dust, snow, and hail are less likely to accumulate on the vertically installed bifacial photovoltaic (PV) unit 100, making it more resistant to dust accumulation, snow, and hail. Furthermore, the cost requirements for mounting brackets are lower, thus reducing the overall cost of the vertical solar system. On the other hand, because the bifacial PV unit 100 has bifacial photovoltaic wafer strips 110, both of its opposing surfaces can receive and convert sunlight, increasing the area of ​​sunlight that can be received and converted, and extending the daily power generation time. Due to the reflector 200 installed at the bottom, the light intensity is generally higher at lower elevations in a vertical solar system. Therefore, configuring bifacial photovoltaic wafer strips 110 with higher voltage at higher elevations, while maintaining the same light intensity, helps optimize photoelectric conversion efficiency. All of these factors contribute to improving the power generation efficiency of the vertical solar system.

[0030] Please refer to Figures 1-3. It should be noted that the "mounting surface" can be the ground, a dedicated mounting platform, or the mounting surface of other mounting structures, including horizontal and sloping surfaces. In practical applications, "the reflector 200 is set on the side of the bifacial photovoltaic element 100 closest to the mounting surface" can be understood as the reflector 200 being set at the "bottom" of the bifacial photovoltaic element 100; the reflector 200 can also be called a "bottom reflector." "Height direction" can be understood as the direction of gravity or the vertical direction in a real-world scenario, or it can be understood as the direction perpendicular to the mounting surface.

[0031] Understandably, the aforementioned bi-directional vertical solar panels can be installed facing east or west, thus providing a very wide angle of sunlight incidence and extending the daily solar power generation time. This allows them to rival tilted solar systems in terms of power generation. Furthermore, east- or west-facing vertical solar systems break the existing pattern of large-scale solar systems primarily being installed facing south or north. The longer power generation time of east-west oriented vertical solar systems not only allows for power generation comparable to tilted systems but also reduces the need for significant energy storage. Vertical solar systems not only save on installation brackets and workload but also make solar power stations more aesthetically pleasing and significantly reduce light pollution. Vertical solar systems can be installed vertically on the ground, blending seamlessly into the community environment and saving considerable land. They are resistant to dust, snow, and hail, exhibiting excellent environmental adaptability and significantly reducing maintenance costs.

[0032] Referring to Figure 1, in one embodiment, the width of the higher bifacial photovoltaic wafer strip 110 in the height direction is greater than the width of the lower bifacial photovoltaic wafer strip 110.

[0033] By varying the width of the bifacial photovoltaic wafer strips 110 at different heights, different voltages are achieved for the bifacial photovoltaic wafer strips 110 at different heights under the same light intensity. Specifically, because the width of the bifacial photovoltaic wafer strip 110 at higher positions is greater than that at lower positions, the voltage of the bifacial photovoltaic wafer strip 110 at higher positions is higher than that at lower positions under the same light intensity. Specifically, the aforementioned "width" can be understood as the length of the bifacial photovoltaic wafer strip 110 in the height direction.

[0034] Please refer to Figure 1. In one embodiment, each bifacial photovoltaic wafer strip 110 includes a plurality of wafers 120 connected in series, and the number of wafers 120 in the bifacial photovoltaic wafer strip 110 with a higher position in the height direction is greater than the number of wafers 120 in the bifacial photovoltaic wafer strip 110 with a lower position.

[0035] By arranging different numbers of wafers 120 in bifacial photovoltaic wafer strips 110 at different heights, the voltage of the bifacial photovoltaic wafer strips 110 at different heights can be varied under the same light intensity. Specifically, since the number of wafers 120 in the higher-positioned bifacial photovoltaic wafer strips 110 is greater than that in the lower-positioned bifacial photovoltaic wafer strips 110, the voltage of the higher-positioned bifacial photovoltaic wafer strips 110 is higher than that of the lower-positioned bifacial photovoltaic wafer strips 110 under the same light intensity. The wafers 120 in each bifacial photovoltaic wafer strip 110 can be arranged horizontally, and multiple wafers 120 in the same bifacial photovoltaic wafer strip 110 can be connected in series horizontally. It is understood that the scheme of changing the number of wafers 120 and the scheme of changing the width of the bifacial photovoltaic wafer strip 110 can be used alone or in combination.

[0036] Please refer to Figure 1. In one embodiment, the double-sided photovoltaic wafer strip 110 is arranged in a horizontal direction perpendicular to the height direction.

[0037] This ensures that in practical applications, the bifacial photovoltaic wafer strips 110 extend roughly in the horizontal direction, and multiple bifacial photovoltaic wafer strips 110 are arranged sequentially along the height direction.

[0038] Please refer to Figures 1-3. In one embodiment, multiple vertical solar panels are configured and arranged side by side.

[0039] By setting up multiple vertical solar panels side by side, it is beneficial to improve the utilization rate of solar energy in a certain area and also to increase the total amount of power generation.

[0040] Please refer to Figures 1-3. In one embodiment, a plurality of vertical solar panels arranged side by side include at least two vertical solar panels of different heights, and / or, a plurality of vertical solar panels arranged side by side include at least two vertical solar panels with different spans in the horizontal direction.

[0041] Vertical solar panels of different heights and / or spans can be flexibly combined according to actual conditions to maximize solar energy utilization at a relatively low cost. For example, two vertical solar panels of different heights and spans can be alternately set up side by side.

[0042] Referring to Figures 4 and 5, in one embodiment, the vertical solar system further includes a closed cavity 300, which is at least partially transparent, and the closed cavity 300 is used to enclose at least one of the bifacial photovoltaic element 100 and the reflector 200.

[0043] On the one hand, by enclosing at least one of the bifacial photovoltaic element 100 and the reflector 200 in the closed cavity 300, it is beneficial to protect at least one of the bifacial photovoltaic element 100 and the reflector 200, and the closed cavity 300 can be further used to achieve heat dissipation of the vertical solar energy system. On the other hand, since at least part of the closed cavity 300 is transparent, sunlight can shine from the transparent part of the closed cavity 300 onto the bifacial photovoltaic element 100 and / or the reflector 200, thereby enabling the vertical solar energy system to normally receive and convert sunlight.

[0044] Please refer to Figures 4 and 5. In one embodiment, the enclosed cavity 300 is capable of containing a cooling medium 330, which includes at least one of water, a transparent liquid, and a gas.

[0045] By incorporating a cooling medium 330 within the enclosed cavity 300, the heat dissipation function of the vertical solar energy system can be improved. Specifically, the cooling medium 330 can be one or more combinations of transparent liquids and gases. The transparent liquid can be water, glycerol, toluene, PMA, butyl acetate, or mixtures thereof.

[0046] Please refer to Figures 4 and 5. In one embodiment, the closed cavity 300 is provided with a connecting pipe 340, which connects the closed cavity 300 to the outside world for heat exchange with the external medium.

[0047] Heat exchange between the enclosed cavity 300 and the external medium is achieved through the connecting pipe 340, which helps to further improve the heat dissipation function of the vertical solar energy system. Of course, the heat conducted from the enclosed cavity 300 can also be used for thermal utilization.

[0048] Please refer to Figures 1-3. In one embodiment, the reflector 200 is configured as at least one of a curved reflector 210 and a reflective Fresnel lens, the reflective Fresnel lens including a liquid reflective Fresnel lens 220.

[0049] The reflector 200 can be flexibly configured as one or more of a curved reflector 210 and a reflective Fresnel lens according to actual needs. Specifically, the reflective Fresnel lens can also be a liquid reflective Fresnel lens 220.

[0050] It is understood that, referring to Figures 1-5, the quantity, specifications and arrangement of the above-mentioned vertical solar energy device, bifacial photovoltaic wafer strips 110 and wafers 120 can be flexibly combined and used, and can also be further combined with different types of enclosed cavities 300 to produce more alternative embodiments as follows.

[0051] For example, please refer to Figure 1, in the first embodiment.

[0052] Referring to Figure 1, the vertical solar system includes a vertical solar panel A, which comprises a vertically arranged bifacial photovoltaic element 100 with a differential vertical arrangement and a reflector 200. The bifacial photovoltaic element 100 with a differential vertical arrangement includes at least two horizontally arranged parallel bifacial photovoltaic wafer strips 110, and under the same light intensity, the voltage of the higher-positioned bifacial photovoltaic wafer strip 110 is higher than the voltage of the lower-positioned bifacial photovoltaic wafer strip 110. Specifically, the bifacial photovoltaic element 100 can be configured as a bifacial photovoltaic panel.

[0053] To achieve this, there are generally two methods to change the voltage of the 120 wafers: changing the width of the wafer 120 or the number of wafers 120 connected in series. Changing the width of the wafer 120 only results in a very small voltage change, while changing the number of wafers 120 connected in series can significantly change the voltage of the bifacial photovoltaic wafer strip 110. However, these two methods are not the only ones. For example, in other embodiments, wafers 120 with different inherent voltages can be used at different heights.

[0054] Please refer to Figure 1. The so-called bifacial photovoltaic wafer 120 refers to a wafer that can receive light energy on both sides and convert (a portion) of the light from the front or back into electrical energy. It should be emphasized that if two adjacent wafers 120 have the same width and number of wafers, then functionally they can be regarded as a single wafer 120, only physically cut. The bifacial photovoltaic wafer strip 110 mentioned in this application refers to a wafer strip with the same function.

[0055] The bifacial photovoltaic element 100 with a differential layout in this embodiment is composed of three horizontally arranged first bifacial photovoltaic wafer strips 111, second bifacial photovoltaic wafer strips 112 and third bifacial photovoltaic wafer strips 113 connected in parallel. The number of wafers 120 in the first bifacial photovoltaic wafer strip 111 is the same as that in the second bifacial photovoltaic wafer strip 112, but its width (in the vertical direction) is smaller than that in the second bifacial photovoltaic wafer strip 112. The width of the second bifacial photovoltaic wafer strip 112 is the same as that in the third bifacial photovoltaic wafer strip 113, but its number of wafers 120 is less than that in the third bifacial photovoltaic wafer strip 113.

[0056] Due to the reflector 200 located at the bottom, the light intensity of the bifacial photovoltaic element 100 in this invention varies at different heights. Generally, the lower the height, the greater the light intensity. Therefore, this invention employs a differentiated layout of bifacial photovoltaic wafer strips 110 to optimize photoelectric conversion efficiency.

[0057] The number of bifacial photovoltaic wafer strips 110 in this embodiment, which is 3, is merely an example. In other embodiments, the number of bifacial photovoltaic wafer strips 120 can be 2 or more than 3. Similarly, the number of wafers 120 in the bifacial photovoltaic wafer strip 110 in this embodiment is also just an example. For slightly larger solar energy systems, the number of wafers 120 in the bifacial photovoltaic wafer strip 110 can be greater than 10. Obviously, when the number of wafers 120 in the bifacial photovoltaic wafer strip 110 is too small, the voltage change between the upper and lower bifacial photovoltaic wafer strips 110 will be either too small or too large, making it difficult to achieve optimal results.

[0058] In this embodiment, the reflector 200 is a curved reflector 210. In other embodiments, the bottom reflector of the ground reflector can also be a reflective Fresnel lens, including a liquid reflective Fresnel lens 220. For example, the third embodiment below uses a liquid reflective Fresnel lens 220.

[0059] For example, please refer to Figure 2, the second embodiment.

[0060] Please refer to Figure 2. The vertical solar system includes two vertical solar units A and a smaller vertical solar unit A' sandwiched in the middle.

[0061] Vertical solar panel A and vertical solar panel A' differ only in height and horizontal span. They share a similar structure, both including bifacial photovoltaic elements 100 arranged vertically and a reflector 200. It is understood that Figure 2 shows a lateral cross-sectional view of the vertical solar system in this embodiment. Specifically, the horizontal span of the vertical solar panel can also be referred to as its "lateral span."

[0062] This embodiment discloses a preferred scenario of using multiple vertical solar panels side by side. By employing two vertical solar panels A and A' of different sizes and alternating their positions, solar energy utilization can be maximized at a relatively low cost.

[0063] In other embodiments, three or more vertical solar panels of different sizes may be used. However, for general applications, two sizes are sufficient.

[0064] This embodiment provides a basic embodiment of the present invention, which includes a vertical solar panel A. In other embodiments, multiple vertical solar panels A may be used side by side.

[0065] It is understood that when multiple vertical solar panels are used side by side, at least two types of vertical solar panels with different heights and horizontal spans can be used, and the at least two types of vertical solar panels with different heights and horizontal spans can be alternately arranged side by side.

[0066] For example, please refer to Figure 3, in the third embodiment.

[0067] Referring to Figure 3, the vertical solar energy system includes two vertical solar panels A and a smaller vertical solar panel A' sandwiched in the middle. This embodiment is similar to the second embodiment, except that the reflector 200 at the bottom is configured as a liquid-reflective Fresnel lens 220, which includes a liquid Fresnel lens 221 and a reflective surface 222. It should be understood that Figure 3 shows a side cross-sectional view of the vertical solar energy system in this embodiment.

[0068] When the reflector 200 adopts a reflective Fresnel lens, it can realize the function of a bottom reflector in a planar manner, thereby enabling the invention to be more smoothly integrated into the community environment and closer to people's living space.

[0069] For example, please refer to Figure 4, in the fourth embodiment.

[0070] Referring to Figure 4, the vertical solar energy system includes two vertical solar panels A. Each vertical solar panel A includes a vertically arranged bifacial photovoltaic element 100 with a differential top-to-bottom arrangement, a reflector 200, and a closed cavity 300. The closed cavity 300 includes a transparent surface 310 and a bottom cover 320. To achieve a closed effect, it is obvious that the end of the closed cavity 300 (not shown) must be integrally connected to the transparent surface 310 and the bottom cover 320. It is understood that Figure 4 shows a side cross-sectional view of the vertical solar energy system in this embodiment.

[0071] In this embodiment, the enclosed cavity 300 is also provided with a cooling medium 330 and a pipe opening 341 for connecting the pipe 340, which serve to dissipate heat and / or utilize heat.

[0072] In this embodiment, the cooling medium 330 is a transparent liquid, which can be water, glycerol, toluene, PMA, butyl acetate, or a mixture thereof. In other embodiments, the cooling medium 330 can also be water or gas.

[0073] This embodiment uses cooling medium 330 to cool the bifacial photovoltaic element 100, thereby improving the photoelectric conversion efficiency of the bifacial photovoltaic element 100.

[0074] In this embodiment, the closed cavity 300 is used to enclose the reflector 200. In other embodiments, the closed cavity 300 can be used to enclose the double-sided photovoltaic element 100 with different upper and lower layouts, or both.

[0075] For example, please refer to Figure 5, in the fifth embodiment.

[0076] Referring to Figure 5, the vertical solar energy system includes two vertical solar panels A. Each vertical solar panel A includes a vertically arranged bifacial photovoltaic element 100 with a differential top-bottom layout, a reflector 200 located at the bottom, and a closed cavity 300. In this embodiment, the closed cavity 300 is made of transparent material, so its entire surface can be considered as a transparent surface 310, thus eliminating the need for a bottom cover 320. It should be understood that Figure 5 shows a side cross-sectional view of the vertical solar energy system in this embodiment.

[0077] The difference between this embodiment and the fourth embodiment is that the closed cavity 300 in this embodiment encloses the double-sided photovoltaic element 100, rather than the reflector 200.

[0078] In this embodiment, the enclosed cavity 300 is further provided with a cooling medium 330 for cooling and a pipe opening 341 for connecting the pipe 340. The cooling medium 330 in this embodiment is a gas. This embodiment achieves the purpose of cooling the bifacial photovoltaic element 100 or utilizing heat by using gas to exchange heat with the external heat circulation system.

[0079] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. A vertical solar energy system, characterized in that, The device includes at least one vertical solar panel, which comprises a bifacial photovoltaic element and a reflector. The bifacial photovoltaic element is mounted on a mounting surface and is arranged in a direction perpendicular to the mounting surface. The reflector is disposed on the side of the bifacial photovoltaic element closer to the mounting surface. The bifacial photovoltaic device has at least two parallel bifacial photovoltaic wafer strips, and the at least two bifacial photovoltaic wafer strips are located at different positions in the height direction. The bifacial photovoltaic wafer strips are used to receive and convert sunlight on two mutually opposite surfaces of the bifacial photovoltaic device. Furthermore, under the same light intensity, among at least two bifacial photovoltaic wafer strips, the bifacial photovoltaic wafer strip with the higher position in the height direction has a higher voltage than the bifacial photovoltaic wafer strip with the lower position.

2. The vertical solar energy system as described in claim 1, characterized in that, The width of the higher bifacial photovoltaic wafer strip in the height direction is greater than the width of the lower bifacial photovoltaic wafer strip.

3. The vertical solar energy system as described in claim 1, characterized in that, Each of the bifacial photovoltaic wafer strips includes multiple wafers connected in series, and the number of wafers in the bifacial photovoltaic wafer strips located at higher positions in the height direction is greater than the number of wafers in the bifacial photovoltaic wafer strips located at lower positions.

4. The vertical solar energy system as described in claim 1, characterized in that, The double-sided photovoltaic wafer strip is arranged in a horizontal direction perpendicular to the height direction.

5. The vertical solar energy system as described in claim 1, characterized in that, The vertical solar panels are configured in multiple ways, and the multiple vertical solar panels are arranged side by side.

6. The vertical solar energy system as described in claim 5, characterized in that, The plurality of vertical solar panels arranged side by side include at least two vertical solar panels of different heights, and / or, the plurality of vertical solar panels arranged side by side include at least two vertical solar panels of different spans in the horizontal direction.

7. The vertical solar energy system as described in any one of claims 1-6, characterized in that, It also includes a closed cavity, which is at least partially transparent, and the closed cavity is used to enclose at least one of the bifacial photovoltaic element and the reflector.

8. The vertical solar energy system as described in claim 7, characterized in that, The enclosed cavity is capable of containing a cooling medium, which includes at least one of a transparent liquid and a gas.

9. The vertical solar energy system as described in claim 7, characterized in that, The enclosed cavity is equipped with a connecting pipe that connects the enclosed cavity to the outside world for heat exchange with the external medium.

10. The vertical solar energy system according to any one of claims 1-6, characterized in that, The reflector is configured as at least one of a curved reflector and a reflective Fresnel lens, wherein the reflective Fresnel lens includes a liquid reflective Fresnel lens.

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