The present, invention relates to collecting solar light; more particularly relates to curing energy focus at center of a solar cell so as to evenly receiving energy of solar beams by a whole solar cell.
Following the development of industries, energies are running out and greenhouse effect is getting worse so that a stable supply of energy has become a major concern to the world. Comparing to traditional energies obtained from burning oil or gas and nuclear energy, a solar cell directly transforms solar energy into electricity through photoelectric effect without accompanying with poisonous material, such as carbon dioxide, nitric oxide, sulfur oxide, etc. The solar cell can thus eliminate the needs in oil and provide safe and self-sufficient power source.
A general solar energy collector uses Fresnel lens on a solar cell to respond to the position changes of the sun for receiving incidence solar light from any direction. The Fresnel lens is well applied to solar cells of big scale with light distributed evenly. Yet, regarding applying it to solar cells of small scale, high energy is gathered at center of the solar cell owing to pitch limited and so the light source is not distributed evenly. In a word, light source is not distributed evenly when applying the Fresnel lens to a small-scale solar cell. Hence, the prior art does not fulfill users' requests on actual use.
The main purpose of the present invention is to improve an evenness of distribution of solar beams with a diffusion plate by curing energy focus at center of a solar cell so as to evenly receiving energy of solar beams by a whole solar cell.
To achieve the above purpose, the present invention is a solar light concentrator, comprising a solar cell to collect solar beam energy; a non-plane lens unit deposed on a surface of the solar cell to receive incidence solar light from any direction; and a diffusing zone deposed in an active area of the non-plane lens unit to diffuse solar beams throughout the whole solar cell. Accordingly, a novel solar light concentrator is obtained.
The present invention will be better understood from the following detailed descriptions of the preferred embodiments according to the present invention, taken in conjunction with the accompanying drawings, in which
The following descriptions of the preferred embodiments are provided to understand the features and the structures of the present invention.
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The solar cell 1 collects energy of the solar beams.
The non-plane lens unit 2 is set on a surface of the solar cell 1 to receive incidence solar lights from any direction. The non-plane lens unit 2 is a transparent substrate 21 cut with indents on a surface of the non-plane lens unit 2. A sectional view of the indents are triangular plate lens 22. And the non-plane lens unit 2 is a Fresnel lens module having a dome-like shape or a plane-roof shape.
The diffusing zone 3 is deposed on the non-plane lens unit 2 to redistribute light source on the solar cell 1. The diffusion zone 3 is located in a light zone of the non-plane lens unit 2 where an energy focus is formed at center of the solar cell 1. The diffusion zone 3 is a diffusion plate 31 in the light zone of the non-plane lens unit 2. Thus, a novel solar light concentrator is obtained.
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(a) obtaining a light zone for the solar beams shining on the solar cell through the non-plane lens unit
(b) subtracting the average amplitude of the solar cell from the maximum amplitude of the solar cell;
(c) dividing result of the step (b) by the maximum amplitude of the solar cell; and
(d) multiplying result from step (c) by the light zone from step (a). Therein, the size of the diffusion plate has an allowance of 20 percents more than and less than the size obtained above. And this area is the active area.
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When using the second embodiment, solar beams are shone on the lens 32 and are diffused to be evenly distributed on the solar cell 1 for transforming light source of the solar beams into required energy.
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When using the third preferred embodiment, solar beams are not refracted before reaching a solar cell 1 through a diffusing zone 3 and then the solar cell 1 evenly receives the solar beams for transforming light source of the solar beams into required energy.
To sum up, the present invention is a solar light concentrator, where an even distribution of solar beams is obtained by using a diffusion plate to cure energy focus at center of a non-plane lens unit so as to evenly receive energy of the solar beams by a whole solar cell.
The preferred embodiments herein disclosed are not intended to unnecessarily limit the scope of the invention. Therefore, simple modifications or variations belonging to the equivalent of the scope of the claims and the instructions disclosed herein for a patent are all within the scope of the present invention.