Eight-sided low-power concentrating photovoltaic unit body and its photovoltaic modules and power generation devices

A concentrating photovoltaic, unit cell technology, applied in the field of solar photovoltaic power generation, can solve the problems of unsatisfactory improvement of power generation efficiency of four-sided reflectors, affecting the service life of photovoltaic cells, wasting lighting area, etc., and achieving the problem of overheating and its small impact, The effect of avoiding heat dissipation and cooling conditions and reducing the cost of electricity

Inactive Publication Date: 2018-08-17
唐荣芬
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The three implementation methods given above all use the reflection method to concentrate sunlight so that the light intensity reaching the photovoltaic cell is one to several times the intensity of sunlight. The advantage is that when the incident sunlight is parallel light, Since the reflection effect of the plane mirror is relatively uniform, the light intensity incident on the photovoltaic cell is also relatively uniform; however, the disadvantage of the reflection method is the limited light concentration ratio
It can be proved by mathematical theoretical derivation that the above-mentioned concentration power generation device reported by ZSW in Germany, when the concentration ratio achieved by the double-sided V-shaped reflector is used (that is, under the condition of vertical light irradiation, the photovoltaic cell passes through direct radiation and reflection (or refraction) The ratio of the total light intensity received by the superimposed radiation to the light intensity received by the photovoltaic cell through direct radiation) The theoretical limit (when the inclination angle between the reflector and the photovoltaic cell is greater than and close to 90°, and the length of the reflector is infinite) is 3 (actual In the application, when the inclination angle between the reflective plate and the photovoltaic cell is 120°, when the effective length of the reflective plate is equal to the length of the photovoltaic cell, the concentration ratio is 2); the concentrator disclosed in the U.S. patent with the patent No. The theoretical limit of the light ratio is 5 (in practical applications, when the inclination angle between the reflective plate and the photovoltaic cell is 120°, when the effective length of the reflective plate is equal to the length of the photovoltaic cell, the concentration ratio is 3); the patent No. ZL200510200596. For battery power generation devices, since the reflected light from two sets of oblique sides cannot evenly cover the photovoltaic cells on the bottom surface, the power generation efficiency improvement effect of using octahedral light funnel reflectors is not ideal compared with the use of four-sided reflectors, and the uneven light intensity will affect the photovoltaic cells. In addition, the octagonal entrance window has a large waste of lighting area in the array combination

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Eight-sided low-power concentrating photovoltaic unit body and its photovoltaic modules and power generation devices
  • Eight-sided low-power concentrating photovoltaic unit body and its photovoltaic modules and power generation devices
  • Eight-sided low-power concentrating photovoltaic unit body and its photovoltaic modules and power generation devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment discloses an eight-sided low-magnification concentrating photovoltaic unit body, such as figure 1 and figure 2 As shown, it includes a square photovoltaic cell 2 and four front side reflectors 3 and four oblique side reflectors 4 arranged around the photovoltaic cell. The four front side reflectors 3 are respectively opposite to the four sides of the photovoltaic cell 2, and the four oblique The side reflectors 4 are respectively opposite to the four corners of the photovoltaic cell 2 , so that the front side reflectors 3 and the oblique side reflectors 4 are alternately arranged. The projections of the 8 reflectors on the plane where the photovoltaic cells are located are distributed together with the photovoltaic cells in the Jiugongge centered on the photovoltaic cells, and the projection of the oblique side reflector 4 is located in the square corresponding to the outside of the four corners of the central square of the Jiugongge (hereinafter referr...

Embodiment 2

[0050] This embodiment provides another eight-sided low-power concentrating photovoltaic unit body. The difference from Embodiment 1 is that the photovoltaic cell used in this embodiment is a single crystal cell with a 45° chamfer. See Figure 6 As shown, the minimum square side length L covering the single crystal cell 3 is 156mm, the side length L after removing the chamfer 4 is 125mm, and the length of the right-angled side of the chamfered triangle is 15.5mm.

[0051] In this embodiment, in order to save the process and reduce the manufacturing cost, the ineffective parts corresponding to the chamfers of the front side reflector and the oblique side reflector are not cut off.

Embodiment 3

[0053] This embodiment provides another eight-sided low-power concentrating photovoltaic unit body, such as Figure 7As shown, the difference from Example 1 is that the square photovoltaic cell 2 used in this embodiment is composed of 36 photovoltaic cell sheets arranged in a 6×6 matrix, and the obtained photovoltaic cell 2 is composed of photovoltaic glass, EVA adhesive film Packaged with the backplane, the size of the package is 990mm×990mm, and the size of the radiator 5 installed behind the backplane is 990mm×990mm; the angle α formed by the plane where the diamond-shaped effective reflective surface is located and the plane where the photovoltaic cell 2 is located is set to 115 °, the angle β formed by the plane where the rectangular effective reflective surface is located and the plane where the photovoltaic cell 2 is located is set to 119.66°; correspondingly, it can be obtained through calculation that the size of the rectangular front side reflector 3 is 1021×990mm, an...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an octahedral low-concentration photovoltaic unit body. The octahedral low-concentration photovoltaic unit body comprises a photovoltaic battery which is square or similar to a square, as well as four front side surface light reflecting plates and four inclined side surface light reflecting plates, which are arranged around the photovoltaic battery; each front side surface light reflecting plate contains a rectangular effective light reflecting surface; each inclined side surface light reflecting plate contains a rhombic effective light reflecting surface; each rectangular effective light reflecting surface and each rhombic effective light reflecting surface reflect the incident light which is perpendicular to a plane in which the photovoltaic battery is positioned, and the surface of the photovoltaic battery is just full of the generated reflected light uniformly. The invention further discloses a concentrating photovoltaic assembly and a concentrating photovoltaic power generating device which consist of the octahedral low-concentration photovoltaic unit body. The limit concentration ratio of the octahedral low-concentration photovoltaic unit body disclosed by the invention can reach 9; the radiation received by the photovoltaic battery is uniform; compared with the conventional reflecting type low-concentration technical scheme, the radiation quantity and the electricity generating capacity of the photovoltaic battery in a unit area are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of solar photovoltaic power generation, and relates to an eight-sided low-power concentrating photovoltaic unit body, a concentrating photovoltaic module and a photovoltaic power generation device composed of the concentrating photovoltaic unit body. Background technique [0002] With the increasingly prominent environmental hazards caused by the development and utilization of traditional fuel energy and the limited availability of energy, the development of renewable clean energy is a common issue facing the world. In the development and utilization of renewable energy, photovoltaic power generation uses photovoltaic cells to convert the light energy received by its surface into electrical energy. It has attracted much attention because of its inexhaustible solar energy as an energy source. The relatively high cost per unit of electricity of photovoltaic power generation devices restricts the promotion of p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H02S40/22
CPCY02E10/52
Inventor 都巍唐荣芬
Owner 唐荣芬
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap