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INVENTION
Patent of the Russian Federation RU2168679
SOLAR PHOTOELECTRIC MODULE WITH CONCENTRATOR
The name of the inventor: Strebkov DS; Tver'yanovich EV; Kivalov SN; Bezrukikh P.P.
The name of the patent holder: All-Russian Scientific Research Institute of Agriculture Electrification
Address for correspondence:
Date of commencement of the patent: 2000.01.24
The invention relates to solar engineering, in particular solar photovoltaic modules with solar concentrators for producing electricity. The photoconverter and the input surface of the radiation from the prism are combined with the surface of the radiation output from the foclin, the side reflecting walls of the prism are aligned with the lower part of the side reflecting walls of the foclin, the radiation entrance surface in the prism is made on two circular cylindrical surfaces having a common line of intersection on the symmetry plane of the concentrator and the line Intersections with lateral reflecting walls of the foclin with the formation of sharp corners at the tops. The object of the invention is to create a compact concentrator. As a result, the dimensions and weight of the module are reduced, and hence its material consumption.
DESCRIPTION OF THE INVENTION
The invention relates to solar engineering, in particular solar photovoltaic modules with solar concentrators for generating electricity.
There is a photoelectric module consisting of a concentrator made in the form of two triangular prisms with lateral reflecting walls and a common radiation exit surface where a photoconverter can be installed (USSR copyright certificate No. 1141368 published on February 23, 1995, bulletin N7).
The module with the described concentrator, made in the form of long prisms oriented to the sides of the world West-East, can operate for a year in a stationary mode or requires a rotation around the West-East axis at a small angle.
The disadvantage of the known solution: large light loss of the module due to the fact that the beam all the distance in the concentrator passes inside a dense optical material, which in any case has absorption above the air. In addition, such a concentrator requires a large amount of optical material for manufacturing prisms, this increases its cost.
A solar photovoltaic module (prototype) is known, made on the basis of a cylindrical foclin having two symmetrical reflecting side walls with an exit surface on which an optically transparent prism is installed having two lateral reflecting walls, an entrance surface and a radiation output surface on which a photoconverter RF No. 2134849, publication 20.08.1999, note 23).
The disadvantage of the known solution is the large material consumption of the optically transparent prism, which increases the module dimensions and its weight.
It is an object of the present invention to provide a compact concentrator that reduces the overall dimensions and weight of the module.
This technical effect is achieved by the fact that in a solar photovoltaic module with a concentrator containing a concentrator based on a cylindrical foclin having two reflecting symmetrical cylindrical sidewalls and a radiation output surface disposed therebetween on which an optically transparent prism having two lateral reflecting walls and a surface The photoconverter and the output surface of the radiation from the prism are combined with the radiation exit surface from the foclin, the side reflecting walls of the prism are aligned with the lower part of the side reflecting walls of the foclin, the surface of the radiation entrance into the prism is made of two circular cylindrical surfaces having a common Line of intersection on the symmetry plane of the concentrator and the line of intersection with the lateral reflecting walls of the foclin with the formation of sharp corners at the vertices.
BRIEF DESCRIPTION OF THE DRAWINGS The essence of the invention is explained in the drawing, which shows the cross section of the module and the scheme for the passage of sunlight.
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A solar photoelectric module comprising a cylindrical foclin 1 concentrator having two reflective symmetrical cylindrical side walls 2, 3 and a radiation output surface 4 located therebetween on which an optically transparent prism 5 having two side reflecting walls 6, 7 and an exit surface Of the radiation 4 with the photoconverter mounted on it 8. The radiation exit surface 4 of the foclin 1 and the prism 5 with the photoconverter 8 is common, the side reflecting walls 6 and 7 of the prism 5 are aligned with the lower part of the side reflecting walls 2 and 3 of the foclin 1, In the prism is made on two circular cylindrical surfaces 9, 10 having a common line of intersection 11 on the symmetry plane 12 of the concentrator and intersection lines 13, 14 with side walls 2 and 3 of the foxtail 1 with the formation of sharp angles In addition, the figure shows: D - the size of the radiation entrance surface in the foclin 1; D is the surface area of the radiation output 4; H is the height of the Focline 1; F 1 and F 2 are the points of the optical foci of the parabolas forming the side walls 2 and 3 of the foclin 1; |
Is the angle of inclination of the branch of the parabola at the vertices 13 and 14. The paths of the rays L 1 , L 2 are given . THE MODULE WORKS AS FOLLOWING
When installing, the plane of the entrance surface D is located at an angle of latitude to the horizontal plane.
At the maximum deviation of the radiation from the plane of symmetry of the concentrator, the ray L 1 is reflected by the walls of the focline into the corresponding optical foci of the generating parabolas F 1 and F 2 . After reflection, the beam hits the surface of the radiation input 9 of the prism 5, is refracted, reflected from the wall 6 and comes to the surface 9 at an angle of total internal reflection 
, After which it is reflected on the radiation output surface 4, where the photoconverter 8 is installed.
The beam L 2 parallel to the plane of symmetry 12, immediately falls on the prism 5, refracts on its surface of the inlet 10, is reflected from the side wall 7 and falls on the photoconverter 8.
In order that the ray L 1 after reflection from the wall 6 hit the surface of the inlet 9 under the angle of total internal reflection , It is necessary that sharp corners 
At vertices 13 and 14 were chosen in accordance with and the condition for total internal reflection at the vertices, which is given by the formula: 
All the rays arriving at the foclin 1 at angles smaller than the angle 
, Will fit into one of the above schemes of the beam.
An example of a specific implementation of a photoelectric module with a concentrator.
The prism is made of glass with a refractive index n = 1.5. The size of the photocell d = 10 mm. The height of the prism h pr = 9.8 mm, and the height of the entire module, taking into account the height of the foclin is H = 77 mm. In this case, the area of the prism section is S pr = 0.49 cm 2 , and the concentration K = D / d = 3.7 times. The optical efficiency of the module is 85%.
In comparison with the prototype at the same photocell size d = 10 mm. The dimensions of the prism: h pr = 4.1 mm, the size of the receiving surface 
Top = 25 mm. Then, the height of the cochlear H is foc = 89 mm, and the height of the entire module is H = h np + H focal = 93.1 mm. In this case, the area of the prism section is S np = 0.7 cm 2 , and the concentration K = D / d = 4.5 times. The optical efficiency of the module is 77%.
Thus, the optical efficiency is increased, the dimensions of the module are reduced by 20% in comparison with the prototype, and the material consumption of the prism used in the module is reduced by 30%.
CLAIM
A solar photoelectric module with a concentrator comprising a cylindrical foclin concentrator having two reflective symmetrical cylindrical side walls and a radiation output surface disposed therebetween on which an optically transparent prism is installed having two side reflecting walls and a radiation output surface with a photoconverter mounted thereon, Characterized in that the radiation exit surface from the foclin and from the prism with the photoconverter is common, the side prism reflecting walls are aligned with the lower part of the side reflecting walls of the foclin, the radiation entrance surface in the prism is made on two circular cylindrical surfaces having a common line of intersection on the symmetry plane of the concentrator And the line of intersection with the side walls of the fooclin with the formation of sharp corners at the tops.
print version
Date of publication 12.01.2007gg
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