A low-power concentrating photovoltaic module

Abstract

The utility model discloses a low-power concentrating photovoltaic assembly, comprising a photovoltaic panel, and a Fresnel lens layer is arranged on the surface of the photovoltaic panel, a bottom plate is arranged on the back side of the photovoltaic panel, and a water inlet gap is formed between the bottom plate and the photovoltaic panel, a water pipe for injecting water into the water inlet gap is arranged at the highest point of the photovoltaic panel, and the water pipe is provided with water outlet holes distributed along the length of the water pipe, and also comprises a submersible pump, and the water outlet end of the submersible pump is connected to the water pipe via a conduit, and a temperature sensor for detecting the temperature of the photovoltaic panel is arranged on the photovoltaic panel; the submersible pump of the utility model pumps lake water into the water inlet gap, so as to cool the photovoltaic panel, avoid the disadvantage that the photovoltaic panel is too high in temperature and leads to reduced power generation efficiency when the sunlight is strong at noon, and cools down by water cooling to ensure high power generation efficiency.

Description

Technical Field

[0001] The utility model relates to the field of solar power generation, in particular to a low-power concentrating photovoltaic component. Background Art

[0002] As a renewable green energy, solar energy has broad development prospects. Solar photovoltaic power generation has become an important method of utilizing new energy. In the solar photovoltaic power generation system, the photovoltaic power generation component is the main device for realizing photoelectric conversion, and it is also the largest part of the cost of the photovoltaic power generation system. At present, the mainstream photovoltaic modules are all plate-shaped photovoltaic modules, which directly encapsulate the photovoltaic cells in the glass plate and receive the sunlight of normal irradiation intensity to generate electricity. On the one hand, the cost of photovoltaic modules mostly comes from photovoltaic cells, and the cost of photovoltaic cells is difficult to be significantly reduced, resulting in high cost of photovoltaic systems; on the other hand, the plate-shaped module is easily affected by wind and needs to be fixed by a sturdy metal bracket, which is costly. In addition, a large shadow area will be formed behind the light-receiving surface of the module, which will seriously affect the lighting of the rear space and hinder the installation of photovoltaic modules.

[0003] Concentrated photovoltaic modules use an optical concentrating system to focus normal sunlight to a certain multiple and then irradiate it onto photovoltaic cell modules to generate electricity, which can save a lot of photovoltaic cell costs. Although tracking through the concentrating system can make the concentrated photovoltaic modules achieve higher power generation efficiency, the general concentrating tracking process requires the installation of motion tracking devices, which not only increases part of the cost, but also has a certain deviation from the actual accuracy of the motion tracking device during the production, installation, and operation of the system requirements, which will also have an adverse effect on the reliability and efficiency of the system operation; In addition, after the optical concentrating system is concentrated, the light density received by the photovoltaic cell module increases significantly. In order to maintain the power generation efficiency of the photovoltaic cell module, the heat dissipation also increases sharply. Data show that for every 1°C increase in the temperature of the photovoltaic cell, the power generation efficiency decreases by about 0.35% to 0.5%. Therefore, additional heat dissipation devices are required to maintain the normal power generation efficiency of the photovoltaic cell module; and most of the existing ones use natural wind for heat dissipation, which is easily affected by the external environment. Many existing photovoltaic panels are installed on the lake surface, which can reduce the evaporation of the lake surface. Therefore, we provide a low-multiple concentrated photovoltaic module that relies on lake water for heat dissipation. Utility Model Content

[0004] In order to solve the defects in the prior art that the photovoltaic components are fixedly assembled and cannot be adjusted in angle, resulting in unsatisfactory power generation efficiency, the utility model provides a low-power concentrating photovoltaic component.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] The utility model discloses a low-power concentrating photovoltaic component, comprising a photovoltaic panel, and a Fresnel lens layer is arranged on the surface of the photovoltaic panel, and is characterized in that a bottom plate is arranged on the back side of the photovoltaic panel, and a water inlet gap is formed between the bottom plate and the photovoltaic panel, a water pipe for injecting water into the water inlet gap is arranged at the highest point of the photovoltaic panel, and the water pipe is provided with water outlet holes distributed along the length of the water pipe, and also comprises a submersible pump, and the water outlet end of the submersible pump is connected to the water pipe via a conduit, and a temperature sensor for detecting the temperature of the photovoltaic panel is arranged on the photovoltaic panel, and also comprises a plc controller, the output end of the temperature sensor is connected to the plc controller, and the submersible pump is connected to the plc controller.

[0007] As a preferred technical solution of the utility model, a plurality of heat dissipation fins located in the water inlet gap are provided on the back side of the photovoltaic panel.

[0008] As a preferred technical solution of the utility model, the bottom plate and the photovoltaic panel are arranged at an angle, so that the water inlet gap is arranged to be wider at the top and narrower at the bottom.

[0009] As a preferred technical solution of the present utility model, a plurality of temperature sensors are provided and distributed in different positions.

[0010] As a preferred technical solution of the utility model, a precision filter cylinder is provided at the water inlet end of the submersible pump.

[0011] The beneficial effects of the utility model are:

[0012] This type of low-concentration photovoltaic module has a bottom plate on the back side of the photovoltaic panel, and a water inlet gap is formed between the bottom plate and the photovoltaic panel. Lake water is pumped into the water inlet gap through a submersible pump, which cools the photovoltaic panel and avoids the disadvantage of reduced power generation efficiency due to excessive temperature of the photovoltaic panel when the sun is strong at noon. The panel is cooled by water cooling to ensure high power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 This is a schematic diagram of the structure of a low-power concentrating photovoltaic module of the utility model;

[0015] Figure 2 This is a schematic diagram of the water inlet gap structure of a low-power concentrating photovoltaic module of the utility model;

[0016] Figure 3 The utility model is a schematic diagram of the installation of a water pipe of a low-power concentrating photovoltaic assembly.

[0017] In the figure: 1. Photovoltaic panel; 2. Fresnel lens layer; 3. Bottom plate; 4. Water inlet gap; 5. Water pipe; 6. Water outlet; 7. Submersible pump; 8. Temperature sensor; 9. PLC controller; 10. Enclosure; 11. Heat dissipation fins. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0019] Example: Figure 1-3 As shown, the utility model is a low-power concentrating photovoltaic assembly, comprising a photovoltaic panel 1, and a Fresnel lens layer 2 is provided on the surface of the photovoltaic panel 1, characterized in that a bottom plate 3 is provided on the back side of the photovoltaic panel 1, and a water inlet gap 4 is formed between the bottom plate 3 and the photovoltaic panel 1, a water pipe 5 for injecting water into the water inlet gap 4 is provided at the highest point of the photovoltaic panel 1, and the water pipe 5 is provided with water outlet holes 6 distributed along the length of the water pipe 5, and also includes a submersible pump 7, and the water outlet end of the submersible pump 7 is connected to the water pipe 5 through a conduit, and the photovoltaic panel 1 is provided with a temperature control device for adjusting the temperature of the photovoltaic panel 1. The photovoltaic panel 1 is provided with a temperature sensor 8 for detecting the temperature, and also includes a plc controller 9. The output end of the temperature sensor 8 is connected to the plc controller 9, and the submersible pump 7 is connected to the plc controller 9. A bottom plate 3 is provided on the back side of the photovoltaic panel 1, and a water inlet gap 4 is formed between the bottom plate 3 and the photovoltaic panel 1. The lake water is pumped into the water inlet gap 4 by the submersible pump 7. In this way, the photovoltaic panel 1 is cooled down, and the disadvantage of the photovoltaic panel 1 being too high in temperature and resulting in reduced power generation efficiency when the sunlight is strong at noon is avoided. The temperature is reduced by water cooling to ensure a higher power generation efficiency.

[0020] The bottom plate 3 and the two sides of the photovoltaic panel 1 are sealed by the enclosure 10, so that water can only flow out from one end of the bottom plate to the other end.

[0021] The back side of the photovoltaic panel 1 is provided with a plurality of heat dissipation fins 11 located in the water inlet gap 4 to increase the contact area with the water body, thereby ensuring a better heat dissipation effect.

[0022] The bottom plate 3 and the photovoltaic panel 1 are arranged at an angle, so that the water inlet gap 4 is arranged to be wide at the top and narrow at the bottom, thereby ensuring that the lower end of the photovoltaic panel 1 can fully contact the water body, thereby having a better heat dissipation effect.

[0023] There are multiple temperature sensors 8 distributed in different positions, so that all-round detection is possible, thereby achieving better temperature detection accuracy.

[0024] The water inlet end of the submersible pump 7 is provided with a precision filter cylinder to filter the water body to prevent impurities in the water body from blocking the water inlet gap.

[0025] Working principle: A bottom plate 3 is provided on the back side of the photovoltaic panel 1, and a water inlet gap 4 is formed between the bottom plate 3 and the photovoltaic panel 1. Lake water is pumped into the water inlet gap 4 through a submersible pump 7. This has the effect of cooling the photovoltaic panel 1, avoiding the disadvantage that the photovoltaic panel 1 is too high in temperature and leads to reduced power generation efficiency when the sunlight is strong at noon. The temperature is reduced by water cooling to ensure a higher power generation efficiency.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A low-power concentrating photovoltaic module, comprising a photovoltaic panel (1), wherein a Fresnel lens layer (2) is provided on the surface of the photovoltaic panel (1), characterized in that: The photovoltaic panel (1) is provided with a bottom plate (3) on the back side, and a water inlet gap (4) is formed between the bottom plate (3) and the photovoltaic panel (1); a water pipe (5) for injecting water into the water inlet gap (4) is provided at the highest point of the photovoltaic panel (1), and the water pipe (5) is provided with water outlet holes (6) distributed along the length of the water pipe (5); a submersible pump (7) is also included, and the water outlet end of the submersible pump (7) is connected to the water pipe (5) via a conduit; a temperature sensor (8) for detecting the temperature of the photovoltaic panel (1) is provided on the photovoltaic panel (1); a PLC controller (9) is also included, and the output end of the temperature sensor (8) is connected to the PLC controller (9), and the submersible pump (7) is connected to the PLC controller (9).

2. A low-concentration photovoltaic module according to claim 1, characterized in that: The bottom plate (3) and two sides of the photovoltaic panel (1) are sealed via a surrounding plate (10).

3. A low-concentration photovoltaic module according to claim 2, characterized in that: The back side of the photovoltaic panel (1) is provided with a plurality of heat dissipation fins (11) located in the water inlet gap (4).

4. A low-concentration photovoltaic module according to claim 1, characterized in that: The bottom plate (3) and the photovoltaic panel (1) are arranged at an inclination, so that the water inlet gap (4) is arranged to be wider at the top and narrower at the bottom.

5. A low-concentration photovoltaic module according to claim 1, characterized in that: A plurality of temperature sensors (8) are provided and distributed in different positions.

6. A low-concentration photovoltaic module according to claim 1, characterized in that: The water inlet end of the submersible pump (7) is provided with a precision filter cylinder.

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