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INVENTION
Russian Federation Patent RU2222755
PV system
Name of the inventor: Alekseev VA .; Anisimova SS .; Shadrin VI
The name of the patentee: State Unitary Enterprise "SPA Astrophysics"
Address for correspondence:. 125424, Moscow, Volokolamskoye Highway 95, State Unitary Enterprise "SPA Astrophysics"
Starting date of the patent: 2002.05.17
The invention relates to solar energy and can be used in solar power plants for converting solar energy into electricity, and can also be used as a power plant for individual use. In accordance with the invention in solar power plant comprising a supporting structure with fixed on it parabolotsilindricheskim hub made of a set of plane mirror facets connected to the outlet tracking block the sun, and extended photoelectric converter disposed on a focal line parabolotsilindricheskogo hub, a support structure for parabolotsilindricheskim hub coaxially to it an elliptic reflector, one focal point of which is aligned with a focus parabolotsilindricheskogo hub at the second focus of which is installed the photoelectric sensor, the output of which is connected to the input of tracking the sun, and the back side of each of the mirror facets on its longitudinal axis perpendicular to its surface the facing the elliptical reflector flat reflective element. With the help of the invention is achieved technical result consists in increasing the accuracy and reliability of guidance solar panel installation on the sun.
DESCRIPTION OF THE INVENTION
The present invention relates to solar energy and can be used in solar power plants for converting solar energy into electricity, and can also be used as a power plant for individual use.
Known solar installations, containing various hubs with curved forming optically conjugated with the receiving surface of the solar energy absorbers [1], [2] and [3].
A disadvantage of such devices is the uneven distribution of the concentrated solar radiation on the receiving surface sinks, which is especially critical, if the solar radiation receiver photoelectric converter is used.
The closest to the technical nature of the proposed invention, selected by the authors as a prototype, is a PV installation comprising a support structure with parabolotsilindricheskim hub attached to it, made of a set of flat mirror facets, combined with access to tracking block the sun, and extended the photoelectric transducer located focus line parabolotsilindricheskogo hub [4].
This PV system over the photoelectric conversion of incident solar radiation from the flat mirror facets forming parabolotsilindrichesky hub. Each facet provides uniform illumination of the photoelectric converter extended, so the concentrated rays coming over the photoelectric converter with all the facets and will be uniform.
The disadvantage of such a PV system is the dependence of the accuracy of the guidance to the sun on the accuracy of mutual soyustirovki sight axis parabolic concentrator and the axis of sight of the photoelectric sensor included in the monitoring circuit of the sun.
With the proposed invention is achieved technical result consists in increasing the accuracy and reliability of guidance solar panel installation on the sun.
In accordance with the proposed invention, the technical result is achieved by the fact that the solar power installation comprising a support structure with fixed on it parabolotsilindricheskim hub made of a set of flat mirror facets connected to the output of the tracking of the sun, and extended the photoelectric converter is located at the focal line parabolotsilindricheskogo a hub on the supporting structure for parabolotsilindricheskim hub coaxially to it an elliptic reflector, one focal point of which is aligned with a focus parabolotsilindricheskogo hub at the second focus of which is installed the photoelectric sensor, the output of which is connected to the input of the sun tracking unit and the rear side of each of the mirror facets on its longitudinal axis is set perpendicular to the surface facing the flat elliptical reflector reflecting element.
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1 schematically shows a general view of the installation of solar power.
Figure 2 is a diagram showing the path of the rays through the optical elements when you hover the solar panel installation on the sun.
A PV installation comprising a support structure 1 which is secured parabolotsilindrichesky hub 2 made of a set of flat mirror facets 3. parabolotsilindricheskogo focal line concentrator 2 is extended photoelectric converter 4. The supporting structure 1 is connected to the output of the sun tracking unit 5. On the supporting structure 1 for parabolotsilindricheskim hub 2 mounted coaxially him elliptical reflector 6, one focus is combined with a focus parabolotsilindricheskogo hub 2, and the second focus is set photoelectric sensor 7, the output of which is connected to the input of the sun tracking unit 5.
The proposed PV system works as follows.
the sun tracking unit 5 carries out pre-orientation of the support structure 1 mounted thereon parabolotsilindricheskim hub 2 by the signals from the central control device (not shown) and determines the height of the sun above the horizon at any given time on a given latitude.
Progress sunlight through optical elements of a PV system is shown in Figure 2.
If the axis of sight GS parabolotsilindricheskogo hub 2 coincides with the direction of the Sun, solar AA rays reflected from the flat mirror facets 3, installed on a tangent parabolotsilindricheskogo Hub 2 (AB-rays), enter the F 1 focus this parabolotsilindricheskogo hub 2 at the focal line of which is available extended photoelectric converter 4.
The back side of each flat mirror facets 3 on its longitudinal axis perpendicular to its surface is set facing the elliptical reflector 6 flat reflecting element 8. Part AA sunlight passes through the window formed in the flat mirror facets 3 reaches the flat reflecting element 8, is reflected from it (AC-rays) and arrives at the elliptical reflector 6.
It is easy to show that AB and AC rays rays lie on the same line, because they received a reflection of the same AA-ray beam from two mutually perpendicular planes (plane NN reflective element 8 is perpendicular to the plane of the LV mirror facets 3).
If AB rays arrive at the point F 1, a point at which the combined parabolotsilindricheskogo concentrator focus 2 and the first focus of the elliptic reflector 6, AS-rays reflected from the elliptical reflector 6, get the second focus F 2 of the elliptic reflector 6, wherein the photoelectric sensor is set 7.
Thus, in the proposed PV system is carried out optical conjugation reception areas extended photoelectric converter 4, and the photoelectric transducer 7, and the position of the light beam on the receiving area of the photoelectric sensor 7 corresponds to the position of the beam at the receiving site of the photoelectric converter 4.
If the axis of sight GS parabolotsilindricheskogo hub 2 does not coincide with the direction of the Sun, there is a light beam center offset from the center of the receiving areas of the photoelectric sensor 7 and the photoelectric converter 4. The photoelectric sensor 7 form the error signal proportional to the magnitude of the displacement, which goes to the input of the tracking unit of the Sun 5. The drive unit tracking the Sun 5 will produce rotation in elevation bearing structure 1 mounted thereon parabolotsilindricheskim hub 2 to align the axis of sight of the TOE with the direction to the sun.
The proposed PV system in contrast to the known main light beam and the light beam used in the photoelectric sensor guidance loop to generate an error signal passes through the common optical elements, so the error guidance solar panel installation at the sun does not include the error of mutual soyustirovki optical paths of the main and control signals.
As shown by the experimental data, a certain value of a PV system errors mutual soyustirovki axes of the main channel (parabolotsilindrichesky hub) and channel guidance loop (photoelectric sensor) depends on weather conditions and may be up to several arcminutes.
The proposed installation of a solar power component pointing error no.
Currently, based on an application made prototype solar panel installation and its full-scale tests conducted at the site in the village Gribanovo Moscow region.
INFORMATION SOURCES
1. AS 1545040, Russia, IPC F 24 J 2/12.
2. Pat. 5655515, US, IPC F 24 J 2/38.
3. Application 19546913, Germany, IPC F 24 J 2/14, F 24 J 2/12.
4. AZ 2000121364/06, Russia, IPC F 24 J 2/14, 2/42 - prototype.
CLAIM
Solar energy installation, comprising a supporting structure attached to it parabolotsilindricheskim hub made of a set of flat mirror facets connected to the output of the tracking unit of the sun, and extended the photoelectric converter is located at the focal line parabolotsilindricheskogo hub, characterized in that the supporting structure for parabolotsilindricheskim hub coaxially to it an elliptic reflector, one focal point of which is aligned with a focus parabolotsilindricheskogo hub at the second focus of which is installed the photoelectric sensor, whose output is connected to an input tracking block the sun, and the back side of each of the mirror facets on its longitudinal axis perpendicular to its surface is set facing elliptical reflector flat reflective element.
print version
Publication date 10.02.2007gg
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