CN101404469A - Secondary reflection concentrating photovoltaic power generation system - Google Patents

Abstract

The invention discloses a secondary reflection concentrating photovoltaic generating system, relates to a concentrating photovoltaic generating system, and belongs to the technical field of solar energy utilization. The system comprises a solar module which is provided with a radiator at the back, an optical collector and an automatic follow sun device which is provided with the solar module and the optical collector; the optical collector comprises a reflecting mirror which is arranged at the two sides of the solar module according to preset angles respectively and forms a V-shaped groove with the solar module; wherein, the solar module is arranged at the bottom of the V-shaped groove; the optical mirror also comprises a secondary reflecting mirror which can reflect the sunlight onto the solar module, and a primary reflecting mirror which can reflect the sunlight onto the secondary reflecting mirror; wherein, the secondary reflecting mirror is arranged laterally above the solar module, and the primary reflecting mirror is arranged beside the solar module. The technical scheme provided by the invention can lead the solar module with the same area to acquire more electric energy, which can not only reduce the cost, but also save the raw material.

Description

Secondary Reflection Concentrating Photovoltaic Power Generation System

technical field

The invention relates to a photovoltaic power generation device, in particular to a secondary reflection concentrating photovoltaic power generation system, which belongs to the technical field of solar energy utilization.

Background technique

The development of solar photovoltaic power generation technology began in the 1950s. With the strong support of governments of various countries, the photovoltaic industry has developed rapidly. The average annual growth rate of solar cells and components production in the last 10 years has reached 33%, and the average annual growth rate in the last 5 years rate reached 43%. Solar photovoltaic power generation will occupy an important seat in the world's energy consumption in the near future, not only to replace some conventional energy sources, but also to become the main body of the world's energy supply. According to the forecast of European JRC, by 2030, renewable energy will account for more than 30% of the total energy structure, and solar photovoltaic power generation will account for more than 10% of the world's total power supply; by 2040, renewable energy will account for more than 50% of total energy consumption , solar photovoltaic power generation will account for more than 20% of the total electricity demand of mankind; by the end of the 21st century, renewable energy will account for more than 80% of the energy structure, and solar power will account for more than 60%, showing an important strategic position.

The bottleneck that restricts the large-scale application of solar photovoltaic power generation is the high investment cost of photovoltaic power generation systems. Concentrating photovoltaic power generation technology is an effective way to reduce costs. Its main purpose is to increase the light intensity received by solar cells and increase power generation through tracking and concentrating light. It is equivalent to partially replacing expensive semiconductor materials with cheap metallic glass and other materials.

The patent with the application number 200520076826.2 and titled "Trough Reflective Concentrating Photovoltaic Power Generation Device" discloses a photovoltaic power generation system using a V-shaped trough to concentrate light. This technical solution has high practical value. However, after in-depth research, the applicant found that the intensity of light received by the solar cell can be further increased through technical improvement, and the power generation per unit area can be increased.

Contents of the invention

Technical problem: The purpose of this invention is to propose a secondary reflection concentrating photovoltaic power generation system with ingenious design, easy manufacture and low cost, which can increase the intensity of light received by solar cell modules, thereby increasing power generation and improving the cost performance of the photovoltaic power generation system.

Technical solution: The secondary reflection concentrating photovoltaic power generation system of the present invention includes a solar cell assembly, a concentrator, an automatic sun tracking device for installing the solar cell assembly and the concentrator, and the concentrator includes solar cells arranged at predetermined angles. Reflectors on both sides of the battery module that form a V-shaped groove with the solar module, wherein the solar module is located at the bottom of the V-shaped groove mirror; the concentrator also includes a secondary reflector that reflects sunlight onto the solar module The mirror and the primary reflector corresponding to it reflect the sunlight to the secondary reflector, wherein the secondary reflector is installed above the solar cell assembly, and the primary reflector is installed beside the solar cell assembly.

One column of the secondary reflectors corresponds to two columns of primary reflectors, and each column of primary reflectors reflects sunlight to a corresponding different solar cell module through the secondary reflectors.

The secondary reflectors are in one-to-one correspondence with the primary reflectors, and each row of primary reflectors reflects sunlight to the same solar cell module through the corresponding secondary reflectors.

The width of the sunlight reflected by the secondary reflector is greater than the width of the solar battery module.

Beneficial effects: the present invention adopts common plane reflectors, through ingenious structural design, so that the light reflected by each column of reflectors is evenly irradiated on the solar battery module on the corresponding side, and the width of the irradiated light is the same as that of the solar battery module. The widths are equal, so as to realize the function of concentrating light, and have the obvious advantages of simple manufacture and low price. The present invention tracks the sun by adopting an easy-to-manufacture and low-cost concentrator to increase the sunlight irradiation intensity received by the solar cell. Under the condition of obtaining the same electric energy, the consumption of the solar cell is only a fraction of that of a fixed photovoltaic power generation system One, and the cost of the added tracking and concentrating mechanism is much lower than the cost of the saved solar cells, thus significantly reducing the overall cost and improving the cost performance.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and typical embodiments.

FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of Embodiment 2 of the present invention.

Fig. 3 is a schematic structural diagram of Embodiment 3 of the present invention.

Among them are: solar battery module 1 with heat sink on the back, concentrator, V-shaped groove reflector 2, secondary reflector 3, and primary reflector 4.

Detailed ways

The secondary reflective concentrating photovoltaic power generation system includes a solar cell module with a radiator on the back, a concentrator, and an automatic sun tracking device for installing the solar cell module and the concentrator. Reflectors on both sides of the battery assembly and forming a V-shaped groove with the solar battery assembly, wherein the solar battery assembly is located at the bottom of the V-shaped groove. A secondary reflector and a corresponding primary reflector that reflects sunlight to the secondary reflector, wherein the secondary reflector is installed above the side of the solar cell module, and the primary reflector is installed next to the solar cell module.

Embodiment one:

The secondary reflective concentrating photovoltaic power generation system of this embodiment is shown in Figure 1, including a solar cell assembly 1 with a radiator on its back, a concentrator, and an automatic sun tracking device for installing the solar cell assembly 1 and the concentrator.

As shown in Figure 1, the concentrator is composed of two sets of V-groove reflectors 2 and a set of secondary reflectors 3, wherein the V-groove reflectors 2 are arranged in a V shape at a predetermined angle on the solar cell module 1 On both sides, the solar cell module 1 is located at the bottom of the V-shaped groove; two primary reflectors 4 reflect sunlight to the secondary reflector 3, and the secondary reflector 3 reflects sunlight to the solar cell module 1, and the secondary reflector 4 The reflector 3 is installed above the side of the solar cell module 1 , and the primary reflector 4 is installed beside the solar cell module 1 .

When the secondary reflection concentrating photovoltaic power generation system is working, the automatic tracking sun device drives the solar cell module 1 and the concentrator to move, so that the solar cell module and the concentrator are always facing the sun, and the sun on the V-shaped groove reflector is vertically incident The light is directly reflected by the V-groove reflector onto the solar cell assembly, while the sunlight vertically incident on the primary reflector of the secondary reflector is reflected by the secondary reflector and converges on the solar cell assembly. In order to make the light reflected by each row of reflectors evenly irradiate the solar battery module on the corresponding side, the width of the irradiated light is greater than the width of the solar battery module.

In this way, the solar cell directly converts solar energy into electrical energy through photoelectric conversion, and then connects to the grid to generate electricity through the grid-connected inverter or provides charging for the battery.

The concentrator of this embodiment is easy to manufacture and low in cost, so that the cost of the added tracking and concentrating mechanism is much lower than the cost of the saved solar cells, thus significantly reducing the overall cost and improving the cost performance of the concentrating photovoltaic power generation system.

Embodiment two:

The secondary reflection concentrating photovoltaic power generation system of this embodiment is generally the same as the first embodiment, the main difference is that the secondary reflection concentrating photovoltaic power generation system consists of a set of V-shaped groove reflectors 2, two sets of primary reflectors 4 and Two groups of secondary reflectors 3 are formed.

As shown in Figure 2, the concentrator consists of a set of V-groove reflectors 2, two sets of primary reflectors 4 and two sets of secondary reflectors 3, where the two secondary reflectors 3 are installed on the solar cell module 1 Two primary reflectors 4 are installed on both sides of the solar cell module 1 above the two sides.

The structure of the concentrator in this embodiment is simpler, which effectively reduces the cost of the concentrating photovoltaic power generation system and improves the cost performance.

Embodiment three:

The secondary reflection concentrating photovoltaic power generation system of this embodiment is substantially the same as that of the second embodiment, the main difference being that the secondary reflection concentrating photovoltaic power generation system consists of a set of V-groove reflectors, a set of secondary reflectors, a A group of primary reflectors.

As shown in Figure 3, the concentrator is composed of a set of V-groove reflectors 2, a set of secondary reflectors 3, and a set of primary reflectors 4, wherein the secondary reflector 3 is located on one side of the solar cell module 1 , the secondary reflector 3 is composed of a primary reflector 4 and a secondary reflector 3, the secondary reflector 3 is installed on one side of the solar cell module 1, and the primary reflector 4 is installed beside the solar cell module 1 .

In addition to the above-mentioned embodiments, the present invention can also have other embodiments. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims (4)

1. A secondary reflective concentrating photovoltaic power generation system, comprising a solar cell assembly (1), a concentrator, an automatic solar tracking device for installing a solar cell assembly and a concentrator, and the concentrator includes a predetermined angle arrangement A reflector (2) forming a V-shaped groove on both sides of the solar cell assembly and the solar cell assembly, wherein the solar cell assembly (1) is located at the bottom of the V-shaped groove reflector (2), characterized in that the concentrator It also includes a secondary reflection mirror (3) that reflects sunlight to the solar cell module (1) and a corresponding primary reflection mirror (4) that reflects sunlight to the secondary reflection mirror (3), wherein the secondary reflection mirror (4) The reflection mirror (3) is installed above the solar cell assembly (1), and the primary reflection mirror (4) is installed beside the solar cell assembly (1). 2. secondary reflection concentrating photovoltaic power generation system according to claim 1, is characterized in that: one row of said secondary reflector (3) corresponds to two rows of primary reflectors (4), and each row of primary reflectors (4) ) all reflect sunlight to different corresponding solar cell components (1) through the secondary reflector (3). 3. The secondary reflection concentrating photovoltaic power generation system according to claim 1, characterized in that: the secondary reflection mirror (3) is in one-to-one correspondence with the primary reflection mirror (4), and each row of primary reflection mirrors (4) The sunlight is reflected onto the same solar cell module (1) through the corresponding secondary reflection mirror (3). 4. The secondary reflection concentrating photovoltaic power generation system according to claim 2 or 3, characterized in that: the width of the sunlight reflected by the secondary reflection mirror (3) is greater than the width of the solar cell module (1).

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