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INVENTION
Russian Federation Patent RU2134849
Solar PV Modules with concentrators
Name of the inventor: Bezrukikh PP .; Strebkov DS .; Tver'yanovich E.V .; Bersenev MA .; Kidyashev JK
The name of the patentee: All-Russian Research Institute for Electrification of Agriculture
Address for correspondence: 109456, Moscow, 1st Veshnyakovskaya etc. 2, VIESH, ONTI and patenting.
Starting date of the patent: 1998.03.12
The invention relates to solar power, in particular solar photovoltaic modules with concentrators of solar radiation to produce electricity and heat. The object of the invention is to increase the degree of concentration of solar radiation in the photovoltaic module, thereby increasing the specific capacity and reduced photoconverter module cost. The photovoltaic module includes a prism of total internal reflection 1, the side face 2 of which are made reflecting the radiation, and on the brink of light output 3 is set phototransformator 4. Prism installed at the outlet 5 parabolotsilindricheskogo focline (focon). Focuses parabolotsilindricheskih reflective surfaces F 1 and F 2 are located on the surface of the prism light input 1 within the projection of the smaller base of the prism on the larger base. The width d equal to the width of the prism outlet 5 focline. Opening angle focline 
equals the angle of input radiation into the prism with a maximum deviation from the normal sun.
DESCRIPTION OF THE INVENTION
The invention relates to solar power, in particular to solar photovoltaic modules with concentrators of solar radiation to produce electricity and heat.
Known solar photovoltaic module comprising an optical element with a trapezoidal cross-section, the lateral faces of which are made light reflecting and raznovelikie base faces are input and output radiation, and placed in contact with the face of the output radiation photovoltaics. The optical element is a prism of total internal reflection, the face of the radiation output is the smaller base of the optical element (AS USSR N 1048260).
The ratio of input and output facets space ratio determines the concentration of solar radiation.
The advantage of the solar module is no need for a tracking device. The disadvantage of the known solutions is that it has a low concentration ratio. This is due to the fact that the minimum angle 
0 at the vertex of the prism at a normal incidence radiation, i.e. when the radiation angle of entry is zero, is equal to half the total internal reflection angle 2 0. For glass with a refractive index n = 1,51, 2 0 = 41 o 30 'theoretical concentration factor for the linear prism K = ctg 0 = 2.64 for circular prism K = 4.
The closest to the technical nature of the present invention is a solar photovoltaic module, in the form of parabolotsilindricheskogo focline, at the outlet of which is mounted photovoltaics. Both focline reflective surfaces in the form of two mirrors of a parabolic shape and are oriented from west to east. The focal region of each parabolic surface focline located in the outlet at the base of the plane opposite to the reflecting surface focline (Solar Todau, July / August, 1997, p.31).
Photovoltaic module does not require tracking the sun with an aperture angle of 24 o. The disadvantage of this module is a low concentration factor of 2.5 at an aperture angle of 24 o.
The disadvantage of both known photovoltaic modules is a low power density photoconverter and therefore high unit cost.
The object of the invention is to increase the level of solar radiation concentration photovoltaic modules and an increase in power density photoconverter.
By using the present invention increases the specific power photoconverter and thereby reduces the cost of the module.
The above technical result is achieved by the fact that the solar photovoltaic module, comprising a hub-based foclines (Fauconnier) and installed at the outlet of photovoltaics hub in the outlet plane of an optical element in the form of a prism internal reflection in a way that focuses focline (focon) located inside the smaller base of the prism projections on the larger base and the minimum beam angle of entry into the prism is equal to the aperture angle focline.
The essence of the invention is illustrated by FIG. 1 - 3. FIG. 1 shows a photovoltaic module, the cross-section. FIG. 2 and 3 - the course of solar radiation at normal incidence and the maximum deviation of solar radiation.
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The photovoltaic module includes a prism of total internal reflection 1, the side face 2 of which are made reflecting the radiation, and on the brink of light output 3 is set phototransformator 4. Prism installed at the outlet 5 parabolotsilindricheskogo focline (focon) with two reflecting surfaces 6 and 7 so that the upper base 8 of the prism coincides with the outlet 5 focline (focon). Focuses parabolotsilindricheskih reflective surfaces F 1 and F 2 are located on the surface of the prism light entry in the smaller base of the prism projections on the larger base. The width d equal to the width of the prism outlet 5 focline. Opening angle focline |
An example of a particular embodiment of the photovoltaic module
The prism is made of glass with refractive index n = 1,5. Prism width d = 180 mm, length 600 mm, apex angle prism 28 o, photoconverter width 72 mm, thickness 30 mm of the prism, the angle of aperture focline = 30 o, focline height H = 250 mm, the width of the upper base of D = 310 mm. Foci F 1 and F 2 focline both surfaces are located in the central part of the upper base of the prism. Geometric degree of concentration for focline K is K = 2, for K = 2.5 prism, a photovoltaic module for K = 5.0. The photovoltaic module is from west to east so that its surface normal is directed to the position of the sun on March 22 and 22 October.
Solar photovoltaic module with a hub works as follows:
Solar radiation enters the focline reflecting surfaces 6 and 7, is reflected on the output surface focline 5 between the focus F 1 and F 2 and the base focline 9 and 10 at an angle equal to or smaller than the aperture angle B focline 6 and 7. Therefore, the module does not require tracking sun. The radiation enters the prism 1 at an entrance angle is reflected by the lateral edges 2 and, after total internal reflection at the larger base of the prism 8 is supplied to the transducers 4. multipath radiation at the brink of light output 3 is added to the direct radiation incident on the larger base 8 within the projection area of the smaller base for more.
Execution module as a composite of two hub focline reflecting surfaces 6 and 7 of the prism 1 allows to increase the specific power photoconverter and concentration of solar radiation in two times in comparison with the hub through the prism.
CLAIM
Solar photovoltaic module comprising a hub based parabalotsilindricheskih foclines (Fauconnier) with the output port and photovoltaics, characterized in that the outlet focline (focon) an optical element in the form of the prism internal reflection plane so that focuses focline located within the projection at a greater based on the prism of its smaller base, the last of which are mounted photovoltaics.
print version
Publication date 18.03.2007gg
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