WO2010050698A2 - Appareil de focalisation de lumière pour un système de génération d’énergie solaire, et système de génération d’énergie solaire utilisant un tel appareil - Google Patents

Appareil de focalisation de lumière pour un système de génération d’énergie solaire, et système de génération d’énergie solaire utilisant un tel appareil Download PDF

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Publication number
WO2010050698A2
WO2010050698A2 PCT/KR2009/006126 KR2009006126W WO2010050698A2 WO 2010050698 A2 WO2010050698 A2 WO 2010050698A2 KR 2009006126 W KR2009006126 W KR 2009006126W WO 2010050698 A2 WO2010050698 A2 WO 2010050698A2
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WIPO (PCT)
Prior art keywords
straight line
point
fresnel lens
virtual
parabola
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PCT/KR2009/006126
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English (en)
Korean (ko)
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WO2010050698A3 (fr
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채수조
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Chae Soo Joh
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Application filed by Chae Soo Joh filed Critical Chae Soo Joh
Publication of WO2010050698A2 publication Critical patent/WO2010050698A2/fr
Publication of WO2010050698A3 publication Critical patent/WO2010050698A3/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/20—Optical components
    • H02S40/22—Light-reflecting or light-concentrating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/30—Arrangements for concentrating solar-rays for solar heat collectors with lenses
    • F24S23/31—Arrangements for concentrating solar-rays for solar heat collectors with lenses having discontinuous faces, e.g. Fresnel lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/006—Systems in which light light is reflected on a plurality of parallel surfaces, e.g. louvre mirrors, total internal reflection [TIR] lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0038—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ambient light
    • G02B19/0042—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ambient light for use with direct solar radiation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/10—Mirrors with curved faces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/74—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with trough-shaped or cylindro-parabolic reflective surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
    • G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
    • G02B7/183—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors specially adapted for very large mirrors, e.g. for astronomy, or solar concentrators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/44—Heat exchange systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/52—PV systems with concentrators

Definitions

  • the present invention relates to a light concentrating device for concentrating solar energy, and a solar energy generating device for increasing power generation efficiency by concentrating solar energy using the same.
  • Solar power generation is achieved by solar cells that convert sunlight or solar energy into electrical energy.
  • Solar cells are roughly divided into silicon-based, compound-based, and the like.
  • Silicon-based solar cells include monocrystalline silicon, polycrystalline silicon, and amorphous silicon solar cells.
  • Monocrystalline silicon solar cells have a relatively high efficiency of 24% to 28%, but have a disadvantage of being expensive, and amorphous silicon solar cells are relatively inexpensive. On the other hand, the efficiency is 10% to 12%, which is relatively low.
  • group III-V compound compounds such as GaAs, InP, GaAlAs, and GaInAs
  • group II-VI compound compounds such as CuInSe 2, CdS, CdTe, and ZnS are used.
  • the efficiency of the solar cell is calculated by the input light energy and the output electric energy.
  • the efficiency is dependent on the open-circuit voltage (Voc) due to the bandgap of the material having the photoelectric performance and the intensity and wavelength of the incident light. It also depends on the distribution of shot-circuit current (Jsc).
  • a tracking device is required so that sunlight is always incident on the solar cell vertically by using a photovoltaic cell having good light efficiency.
  • III-V tandem solar cell has a high unit cost, so it is necessary to reduce the solar cell area through condensing mirrors or lenses.
  • the Fresnel lens 10 has a parabola having the same focal coordinate value (0, -1) and an optional refractive index (n, assumed in FIG. 1 as 1.5) with respect to the incident direction DL of light. Can be calculated by the functions F1, F2, F3 ...
  • the Fresnel lens 10 moves away from the reference axis passing through the focal coordinate value (0, -1), that is, as the absolute value of the x-coordinate increases and reaches the critical point (the point where the F11 and the x-axis meet), The efficiency of the inferior, and passing the critical point loses the function of focusing light, so there is a problem in that the size of the Fresnel lens is limited.
  • the parabolic focused reflector 20 may be calculated by a parabolic function R having a focal coordinate value (0, -1) with respect to the incident direction DL of light.
  • this parabolic focusing reflector 20 arranges the solar panel 30 on a focus in a cylindrical structure made of a parabolic focusing reflector as shown in FIG. 2, that is, arranges the solar panel on the solar path DL. Since the solar panel is to block the sunlight, there is a problem that the condensing loss area (RA) is generated accordingly.
  • RA condensing loss area
  • the technique according to the reference 2 requires a large parabolic focusing reflector in order to focus the sunlight in a wide area, thereby increasing the cost, there is a problem that is difficult to install and maintain.
  • the light collecting module and the solar panel made of a plurality of flat reflecting plates should be spaced more than a predetermined distance, there is a problem that the size of the overall photovoltaic device increases, and also the solar panel located on the focus of the light collecting module. There is a problem of being separated from the focus by the surrounding environment such as wind and gravity.
  • planar reflector according to the reference 3 has a problem that the individual reflector is made of a plane, so that the light reflected by the individual reflector of each solar panel must have a very large number of planar reflectors.
  • quotation 4 to eliminate the light loss region (RA) caused by the problem of the reference 2 is caused by placing the solar panel on the solar path
  • a first condensing lens portion made of a Fresnel lens is disposed on a solar path corresponding to the condensing loss region
  • a second condensing lens portion made of a Fresnel lens is disposed extending to a side of the first condensing lens portion.
  • the technique according to Reference 4 is a technique that cannot be physically realized, and the light reflected by the first reflecting plate close to the solar panel by the second condensing lens unit may be transmitted to the solar panel.
  • the light reflected by the second and third reflecting plates positioned at the rear side is blocked by the first reflecting plates and thus cannot be transmitted to the solar panel.
  • the present invention has been made to solve the above problems, and to minimize the light loss region (RA) generated by placing the solar panel on the solar path.
  • RA light loss region
  • the present invention is to minimize the size of the light concentrating device and the photovoltaic device for focusing light using a reflector and to increase the light focusing rate.
  • the present invention is to prevent the focusing device is exposed to wind and gravity for a long time to deform the focus, or to separate the solar panel from the focus.
  • a light collecting device Fresnel lens having a predetermined focus; A first reflection plate spaced apart from the Fresnel lens and formed on a virtual first parabolic trajectory having the same focus as the Fresnel lens; And a second reflector plate spaced from the first parabola and formed on a virtual second parabolic trajectory having the same focus as the Fresnel lens and the first parabola, and spaced apart from the Fresnel lens and the first reflector plate.
  • the first reflector may include at least a virtual agent extending from the outermost portion of the Fresnel lens in a direction parallel to a virtual first straight line connecting the center of the Fresnel lens and the focal point. Extends from a first point where the second straight line meets the first parabola to a second point where the virtual third straight line connecting the focal point and the outermost portion of the Fresnel lens and the first parabola meets the second
  • the reflecting plate is connected at least from the third point where the virtual fourth straight line extending from the second point in the direction parallel to the first straight line and the second parabola meets the focus point and the first point. It is preferable to extend to the fourth point where the fifth straight line and the second parabola meet.
  • the first reflector may include at least a virtual agent extending from the outermost portion of the Fresnel lens in a direction parallel to a virtual first straight line connecting the center of the Fresnel lens and the focal point. From the first point where the second straight line meets the first parabola, the second sixth point where the virtual sixth straight line extending from the center of the Fresnel lens in the direction perpendicular to the first straight line meets the first parabola. And the second reflecting plate extends at least from point 3-1 where the virtual 4-1 straight line extending from point 2-1 in the direction parallel to the first straight line meets the second parabola. It is preferable to extend to the point 4-1 where the sixth straight line and the second parabola meet.
  • an end closer to the focal point of both ends of the first reflecting plate and an end closer to the focal point of both ends of the second reflecting plate may be configured to connect the center of the Fresnel lens and the focal point.
  • an end close to the focal point of both ends of the first reflecting plate and a far end of the focal point of both ends of the second reflecting plate are on the locus of the sixth straight line or on the sixth straight line. It is preferable to be located between and the seventh straight line.
  • a light collecting device Fresnel lens having a predetermined focus; And a first reflection plate spaced apart from the Fresnel lens and formed on a virtual first parabolic trajectory having the same focus as the Fresnel lens, wherein the first reflection plate comprises at least a center of the Fresnel lens and the first reflection plate. Extends in a direction away from the focus point from a first point where the virtual second straight line extending from the outermost portion of the Fresnel lens and the first parabola meet in a direction parallel to the virtual first straight line connecting the focus points
  • the first reflecting plate extends at least from the first point to a point where an imaginary third straight line connecting the outermost portion of the focus and the Fresnel lens meets the point where the first parabola meets. desirable.
  • the first reflecting plate may meet at least a sixth virtual straight line extending from the center of the Fresnel lens in a direction perpendicular to the first straight line from the first point. It is preferred to extend to the point.
  • a photovoltaic device according to an embodiment of the present invention, a light collecting device according to various embodiments of the present invention and a solar cell located in the focus of the light collecting device.
  • a photovoltaic device according to another embodiment of the present invention, the light concentrating device according to various embodiments of the present invention and the trajectory image of a virtual straight line connecting the center and the focus of the Fresnel lens It includes at least two solar panels at the vertices.
  • the light condensing loss region (RA) by using a reflecting plate arranged in accordance with the trajectory of the light collected by the Fresnel lens and the parabola having the same focus as the Fresnel lens disposed on the outer side of the Fresnel lens ), Minimizes the size of the light concentrating device and the photovoltaic device that focuses light and increases the light focusing rate.
  • the size of the light collecting device can be minimized and thus firmly fixed to the case, thereby preventing the light collecting device from being exposed to wind and gravity for a long time to deform the focus or to separate the solar panel from the focus. It has an effect.
  • 1 is a view for explaining the principle of the Fresnel lens.
  • FIG. 2 is a view for explaining the principle of a parabolic focusing reflector.
  • FIG 3 is a perspective view of a light collecting device and a solar energy generating device using the same according to an embodiment of the present invention.
  • FIG. 4 is a perspective view of a light collecting device and a solar energy generating device using the same according to another embodiment of the present invention.
  • FIG. 5 is a graph showing a combination of respective parabolic functions for explaining the Fresnel lens and the focusing reflector according to the present invention.
  • 6 to 8 are cross-sectional views illustrating various embodiments of a light collecting device cut by the AA ′ cutting line of FIG. 3 or the BB ′ cutting line of FIG. 4.
  • 10 is a view for explaining the round motion of the sun according to the season.
  • FIG. 11 is a perspective view showing the main part of the solar tracking solar power generation system according to an embodiment of the present invention.
  • Fresnel Lens Fresnel Lens
  • FIG. 3 and 4 are a perspective view of a solar energy generating device using a light collecting device according to an embodiment of the present invention
  • Figure 3 is a linear arrangement of the light collecting device and the solar panel for power generation
  • Figure 4 The solar panel is disposed at a point corresponding to the focus by arranging the light collecting device in a circle.
  • the solar energy generator 510 using the linear light collecting device of FIG. 3 is largely comprised of a Fresnel lens 110, a reflector 210, and a solar panel 310.
  • Fresnel lens 110 is made of a transparent material having an optical refractive index n, in the present invention used a transparent polymer having an optical refractive index of 1.5 as an embodiment, will be described in detail with reference to Figures 5 to 8. .
  • the reflecting plate 210 is made of a light reflective material or a material formed on the surface of the light reflective material.
  • aluminum is used as an embodiment.
  • the reflecting plate 210 may be formed on the trajectory of the parabola having the same focus as the focus of the Fresnel lens 110, thereby focusing the light incident on the reflecting plate 210 to the focus.
  • one reflective plate 210 may be disposed on each side of the Fresnel lens 110, or a plurality of reflective plates 210 may be disposed.
  • the reflecting plates 211, 212, 213 are disposed so that the reflecting plates 211 near the focus do not block the light focused by the reflecting plates 212, 213 far from the focus.
  • the detailed description will be described later with reference to FIGS. 5 to 8.
  • the solar panel 310 is located at the focus of the Fresnel lens 110 and the reflector 210 and converts light into electricity. Any solar cell such as silicon-based or compound-based may be used.
  • the vertex of the triangle formed by facing the two solar panels 311 and 312 is located on an imaginary straight line trajectory that connects the center of the Fresnel lens 110 with the focal point.
  • the display panel may further include a case 410 for fixing the Fresnel lens 110, the reflecting plate 210, and the solar panel 310.
  • the solar energy generator 520 using the circular light collecting device of FIG. 4 is largely comprised of a Fresnel lens 120, a reflector plate 220, and a solar panel 320.
  • Fresnel lens 120 is the same as the embodiment of Figure 3 except that the light incident surface is formed in a circular shape and the curve of the Fresnel lens accordingly arranged.
  • the reflective plate 220 is also the same as the embodiment of FIG. 3 except that the shape of the reflective plate viewed from the light incident portion, that is, the light incident angle, is circular.
  • the reflecting plates 221, 222, 223 are disposed so that the reflecting plate 221 close to the focus does not block the light focused by the reflecting plates 222, 223 far from the focus.
  • the detailed description will be described later with reference to FIGS. 5 to 8.
  • the solar panel 320 is located at the focus of the Fresnel lens 120 and the reflecting plate 220 and converts light into electricity, and any solar cell such as silicon-based or compound-based may be used.
  • the solar panel 320 forms a triangular pyramid or polygonal pyramid with the plurality of solar panels 321 and 322 in order to minimize reflection of light focused by the reflector 220 by the surface of the solar panel 320. It is preferable to increase the incident angle of the light transmitted from the reflecting plate 220 to the solar panel.
  • the apex which is a vertex of the polygonal pyramid facing the plurality of solar panels 321 and 322, is preferably located at an imaginary straight line trajectory that connects the center of the Fresnel lens 120 with the focal point.
  • the display panel may further include a case 420 for fixing the Fresnel lens 120, the reflector plate 220, and the solar panel 320.
  • FIG. 5 is a view for explaining a method for obtaining a trajectory for designing a Fresnel lens and a reflecting plate of the present invention.
  • a Fresnel lens having a central coordinate (0,0) and a focal coordinate (0, -1) and having an optical refractive index n of 1.5 has a separation distance from the first parabolic trajectory Ff1 and the first parabolic trajectory Ff1.
  • ⁇ f) can be calculated from parabolic trajectories Ff2, ... Ff7 spaced sequentially by center coordinates.
  • i is from 0 to the desired number of parabolic trajectories, but as described in FIG. 1, i is designed from 0 to 7 in consideration of the critical point and the efficiency of the Fresnel lens.
  • the Fresnel lens has the X-axis as the upper surface of the Fresnel lens, and the incident light is formed by forming the portion partitioned by the X-axis and parabolic trajectories Ff1, ... Ff7 as the projection bottom surface. -1) can be focused.
  • the parabolic trajectory for the reflector can be calculated by Equation 2 below with the same focal coordinates (0, -1) as the focal coordinates (0, -1) of the Fresnel lens.
  • a is a constant that adjusts the width of the parabola
  • -b is a y-intercept when j is 0 of the plurality of parabolic trajectories for the reflector, j is from 0 to the desired number of parabolic trajectories.
  • the value of the y-intercept, that is, -b + j * ⁇ r is not larger than the y-coordinate of the focus point.
  • a is set to 4
  • b is set to 2
  • j is set from 0 to 10.
  • the Fresnel lens using the parabolic trajectory calculated by Equation 1 and the reflector formed on the parabolic trajectory calculated by Equation 2 are used to focus light incident in the y-axis direction (0,-). You can focus on 1).
  • 6 to 8 are diagrams for describing various embodiments for designing a Fresnel lens and a reflecting plate in a cross section taken by cutting lines AA ′ and BB ′ of the light collecting device illustrated in FIG. 3 or 4.
  • Equation 1 the parabolic trajectory for designing a Fresnel lens
  • Equation 2 the parabolic trajectory for designing a reflector
  • FIG. 6 is a view for explaining a first embodiment of the light collecting device of the present invention.
  • the Fresnel lens is formed on the X axis with respect to the Y axis as described with reference to FIG. 5, and the reflector is spaced apart from the Fresnel lens. And formed symmetrically about the Y axis.
  • the Fresnel lens used a parabola from Ff1 to Ff7 as shown in FIG. 5 using [Equation 1]. Accordingly, the outermost part of the Fresnel lens is a point where the parabola Ff7 and the X-axis meet (X1). X0 is calculated to be about 0.5679.
  • the outermost portion (X1,0) of the Fresnel lens is aligned in the Y-axis direction, that is, the direction parallel to the imaginary first straight line connecting the focal coordinates (0, -1) in the center coordinates (0,0) of the Fresnel lens.
  • the passing virtual straight line is called a second straight line, and the point where the second straight line meets one of the parabolas Fr1 to Fr10 according to [Equation 2] is called the first point (X1, Y1-1).
  • an imaginary straight line connecting the focal point (0, -1) and the outermost (X1,0) of the Fresnel lens is called a third straight line, and the [math] passing through the first point (X1, Y1-1).
  • the first point (X1, Y1-1) and the second point (X2, Y1- 2) can be connected along the trajectory of the parabolic to obtain the trajectory (R1) of the reflector.
  • the solar cell is formed on one surface because the direction of focusing at the focusing point (0, -1) of the incident light is the direction in which the Y value increases, that is, it goes up from the bottom. It is not useful because it is reflected on the other side of the panel.
  • Fr8 shown in FIG. 5 was selected as a parabolic trajectory for reflector design.
  • the coordinate value of the first point (X1, Y1-1) was about (0.56789, -1.03125), so that Y1-1, the Y coordinate value of the first point, was slightly smaller than -1, which is the Y coordinate value of the focus point. .
  • the point where the parabolic line Fr8 meets the seventh straight line extending from the focal point (0, -1) may be selected as the first-first point (X'1, Y'1-1).
  • the coordinates of the 1st-1st point (X'1, Y'1-1) were about (0.6, -1), which were slightly larger than 0.56789, which is the outermost X coordinate value (X1) of the Fresnel lens.
  • X1 the outermost X coordinate value of the Fresnel lens.
  • Equation 2 the j value is input as a decimal value instead of an integer so that the Y coordinate value at the point where the second straight line and the parabola meet is -1 on the trajectory of the parabola Fr8 '(not shown). It is also possible to form a reflecting plate.
  • FIG. 7 is a view for explaining a second embodiment of the light collecting device of the present invention.
  • the Fresnel lens is formed on the X axis with respect to the Y axis as described with reference to FIG. 5, and the reflector is formed from the Fresnel lens. Spaced apart and formed symmetrically about the Y axis.
  • Fresnel lens was the same as in Example 1.
  • the outermost portion (X1,0) of the Fresnel lens is aligned in the Y-axis direction, that is, the direction parallel to the imaginary first straight line connecting the focal coordinates (0, -1) in the center coordinates (0,0) of the Fresnel lens.
  • a virtual straight line passing through is called a second straight line, and the point where the second straight line meets an arbitrary parabola among the parabolas Fr1 and .Fr10 according to Equation 2 which is the first parabola is the first point X1. , Y1-1).
  • the virtual straight line extending from the focal point (0, -1) in the X-axis direction is a seventh straight line
  • the first point (X1, Y1-1) among the parabolas Fr1 to Fr10 according to Equation 2 it is preferable to select a parabola whose Y coordinate value of the point where the second straight line and the parabolas Fr1, .., Fr10 meet is greater than or equal to the Y coordinate value of the seventh straight line.
  • a parabola that is slightly smaller than the Y coordinate value of the seventh straight line may be selected.
  • the parabolic j j of 10 is selected as the first parabola, that is, Fr10.
  • An imaginary straight line connecting the focal point (0, -1) and the outermost (X1,0) of the Fresnel lens is called a third straight line, and the first parabola passing through the first points (X1, Y1-1)
  • the second point (X2, Y1-2) the point where the third straight line meets
  • the first point (X1, Y1-1) and the second point (X2, Y1-2) are the first parabola.
  • the trace R1 of the first reflecting plate can be obtained by connecting along the trace of.
  • Equation (2) An imaginary straight line passing through the second points X2 and Y1-2 in a direction parallel to the first straight line is referred to as a fourth straight line, and the fourth straight line and the second parabola are represented by Equation (2).
  • a point that meets any parabola among the parabolas Fr1 and ..Fr9 except for one parabola Fr10 is referred to as a third point (X2, Y2-1).
  • the Y coordinate value of the third point is greater than or equal to ⁇ 1, which is the Y coordinate value of the seventh straight line.
  • An imaginary straight line connecting the focal point (0, -1) and the first point (X1, Y1-1) is called a fifth straight line, and the second parabola and the second point passing through the third point (X2, Y2-1) and the When the point where the fifth straight line meets is called the fourth point (X3, Y2-2), the third point (X2, Y2-1) and the fourth point (X3, Y2-2) are traces of the second parabola. By connecting along, it is possible to obtain the trajectory R2 of the second reflecting plate.
  • the trajectory R3 of the third reflecting plate to the trajectory R5 of the fifth reflecting plate can be obtained.
  • the reflecting plates formed by the above method are divided reflectors because the reflecting plate close to the focus is not located on the condensing path of the reflecting plate far from the focus in condensing the incident light to the focus (0, -1).
  • ML2 condensing width
  • MH2 height
  • FIG. 8 is a view for explaining a third embodiment of the light collecting device of the present invention, and the Fresnel lens has the X-axis image based on the Y-axis as described with reference to FIG. 5 as in the first and second embodiments.
  • the reflecting plates are spaced apart from the Fresnel lens and symmetrically about the Y axis as in Example 2, but the method of selecting a point above the reflecting plate trajectory is different.
  • the first points X1 and Y1-1 on the trajectory R1 of the first reflecting plate may be selected in the same manner as in the second embodiment.
  • An imaginary straight line connecting the focal point (0, -1) and the outermost (X1,0) of the Fresnel lens is called a third straight line, and the first parabolic line passing through the first points (X1, Y1-1)
  • the point where the third straight line meets is called a second point
  • the sixth straight line which is perpendicular to the first straight line (an imaginary straight line connecting the center of the Fresnel lens and the focal point) and passes through the center of the Fresnel lens.
  • a virtual straight line passing through the 2-1 point (X2, Y1-2) in a direction parallel to the first straight line is called a 4-1 straight line
  • the 4-1 straight line and the second parabola [ Equation 2] refers to the point 3-1 point (X2, Y2-1) that meets any of the parabolas (Fr1, Fr9) other than the first parabola Fr10.
  • the Y coordinate value of the 3-1 point is greater than or equal to ⁇ 1, the Y coordinate value of the seventh straight line. .
  • An imaginary straight line connecting the focal point (0, -1) and the first point (X1, Y1-1) is called a fifth straight line, and the second parabola passing through the third-1 point (X2, Y2-1)
  • the fourth point when the point where the point where the fifth straight line meets is called the fourth point, when the Y coordinate value of the fourth point is larger than the Y coordinate value of the sixth line, the end of the second reflecting plate is not the fourth point.
  • the second reflector trace R2 connecting point 3-1 and point 4-1 can be obtained as point 4-1 (X3, Y2-2), which is a point where the parabolic line and the sixth straight line intersect. .
  • the trajectory R3 of the third reflecting plate to the trajectory R6 of the sixth reflecting plate may be obtained in the same manner as the trajectory R2 of the second reflecting plate.
  • the light reflector has a wider condensing width ML3 by the divided reflectors, but has an advantage of further reducing the height MH3 of the condenser device than the second embodiment.
  • Example 2 The larger the size of one reflector is, the more expensive it is, and the condenser module height (MH) is the most important factor affecting the size of the photovoltaic device. More preferred is Example 2 or Example 3, which is small in size and relatively large in light converging region ML.
  • the solar tracking device 600 is further introduced into the solar energy generator described with reference to FIG. 3 or 4 including the solar panel in the light collecting device according to various embodiments of the present invention described with reference to FIGS. 5 to 9. The efficiency can be maximized.
  • the movement trajectory tracking method of the sun may use various methods, such as a known tracking method or a tracking method by a program, and the movement of the sun according to an embodiment of the present invention with reference to FIGS. 10 to 11. The following describes the trajectory tracking method.
  • the sun changes seasonally with its southern mid-altitude as the Earth revolves, as shown in FIG.
  • the Earth's axis is inclined by ⁇ to the horizon, facing the North Star. At this time, the angle ⁇ formed by the Earth's axis and the horizon is equal to the latitude of the observed area.
  • B represents the diurnal motion of the sun when the sun's declination is 0 °, that is, the vernal equinox or the autumn equinox, and it floats in Jeong-dong along the celestial equator to become emotional, and the length of day and night is the same.
  • A represents the circumferential motion of the sun when the solar declination is + 23.5 °, that is, when it is the lower limb.
  • C denotes the diurnal motion of the sun when the declination of the sun is -23.5 °, i. Regardless of the season, in any region, the sun will move around the Earth's axis. However, depending on the season there will be only a change in the sun's mid-high altitude (a, b, c).
  • the solar tracking device 600 is a solar energy generating device 500 according to various embodiments of the present invention installed on the first rotating shaft 620 as shown in FIG. It is necessary to increase the power generation efficiency of the solar energy generator 500 by rotating on the first rotary shaft 620.
  • the solar energy generating apparatuses 500 are arranged at regular intervals to be perpendicular to the first rotating shaft 620 along the longitudinal direction of the first rotating shaft 620, and are provided to be rotatable on the first rotating shaft 620. It is preferable to be fixed to the two second rotation shaft 660. That is, the plurality of second rotation shafts 660 are formed in the first rotation shaft 620 so that the insertion grooves 622 are formed at predetermined intervals along the longitudinal direction thereof, and one end is inserted into the insertion grooves 622 so as to be rotatable. ) Is provided.
  • each solar energy generator 500 is fixedly installed at the other end of each of the second rotary shafts 660. Therefore, each solar energy generator 500 is arranged in a direction perpendicular to the length direction of the first axis of rotation 620 to be rotatable on the first axis of rotation (620).
  • the solar energy generation system according to an embodiment of the present invention, the second plurality of solar energy generation devices 500 installed on the first rotating shaft 620 to track the change in the south mid-altitude of the sun according to the revolution of the earth
  • the rotating shaft 660 has a structure for rotating the same, respectively.
  • the connecting member 670 is formed to extend from each of the second rotary shaft 660, the cylindrical member 680 having a through hole is rotatably coupled to the end of the connecting member 670, the cylindrical member 680 The rotation control rod 690 is inserted into and fixed to the through-holes.
  • the cylindrical member 680 is preferably installed at both ends of the pair of connecting members 670 so as to be rotatable.
  • connection member 670 and the second rotation shaft 660 rotate on the first rotation shaft 620.
  • the solar energy generator 500 fixed to the second rotary shaft 660 is rotated.
  • the rotation control rod 690 is configured to be interlocked by a motor, and the motor is controlled by the controller.
  • the solar tracking photovoltaic power generation system installs the first rotating shaft 620 in a frame (not shown) in parallel with the earth's rotating shaft, and the first rotating shaft 620. ) Rotates at a constant 15 ° per hour to track the sun's circumference of the sun.
  • the plurality of first rotating shafts 620 provided with the solar energy generators 500 are connected to a chain or a belt (not shown) driven by a motor (not shown), and connected to the motor.
  • the controller (not shown) rotates the first rotational shafts 620 at the same angular velocity so as to track the circumference of the sun according to the rotation of the earth.
  • each cylindrical member 680 is moved, and the connection member 670 and the second rotation shaft 660 to which the cylindrical member 680 is rotatably rotated are the first rotation shaft 620. Will rotate in phase.
  • the solar energy generators 500 fixed to the second rotating shaft 660 are rotated around the second rotating shaft 660, so that the change in the south middle elevation of the sun according to the revolution of the earth can be tracked.
  • the rotation control rods 690 installed on each of the first rotation shafts 620 may be automated by interlocking with the above-described motor through a mechanical configuration. However, since the change in the altitude of the sun according to the revolution of the earth is very small per day, it is possible to configure the worker to adjust the rotation control rod 690 in accordance with the change in the south middle altitude after a predetermined period.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
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  • Thermal Sciences (AREA)
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  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Photovoltaic Devices (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

La présente invention concerne un appareil de focalisation de lumière comportant: une lentille de Fresnel comprenant un foyer prédéterminé ; un premier réflecteur espacé de la lentille de Fresnel, et formé sur une trajectoire parabolique virtuelle ayant le même foyer que celui de la lentille de Fresnel ; et un second réflecteur formé sur une seconde trajectoire parabolique virtuelle, et qui a le même foyer que ceux de la lentille de Fresnel et de la première trajectoire parabolique virtuelle, le second réflecteur étant espacé de la lentille de Fresnel et du premier réflecteur. La présente invention concerne également un appareil de génération d’énergie solaire. L’appareil de focalisation de la lumière selon la présente invention minimise la surface de perte (RA), minimise sa taille et la taille de l’appareil de génération d’énergie solaire, et améliore le taux de focalisation de lumière.
PCT/KR2009/006126 2008-10-27 2009-10-22 Appareil de focalisation de lumière pour un système de génération d’énergie solaire, et système de génération d’énergie solaire utilisant un tel appareil WO2010050698A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2008-0105129 2008-10-27
KR1020080105129A KR20100046337A (ko) 2008-10-27 2008-10-27 태양에너지 발전 시스템용 집광장치 및 이를 이용한 태양에너지 발전 시스템

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WO2010050698A2 true WO2010050698A2 (fr) 2010-05-06
WO2010050698A3 WO2010050698A3 (fr) 2010-07-29

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102436861A (zh) * 2011-12-07 2012-05-02 长春理工大学 多抛物面共焦x射线聚焦结构及设计方法

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Publication number Priority date Publication date Assignee Title
KR101108728B1 (ko) * 2010-12-22 2012-02-29 삼성전기주식회사 반사광 차단 필름 및 이의 제조방법
KR102223799B1 (ko) * 2018-12-27 2021-03-05 한국광기술원 평면형 및 파라볼릭형 반사체와 광혼합체로 구성된 집광형 태양전지 모듈

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JPS61199671A (ja) * 1985-03-01 1986-09-04 Hitachi Ltd 折りたたみ式集光型太陽電池パネル
JP2006080524A (ja) * 2004-09-13 2006-03-23 General Electric Co <Ge> 太陽光集中装置の光起電力モジュール
KR20070088221A (ko) * 2006-02-17 2007-08-29 강성탁 태양에너지 발전용 집광장치

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JPS61199671A (ja) * 1985-03-01 1986-09-04 Hitachi Ltd 折りたたみ式集光型太陽電池パネル
JP2006080524A (ja) * 2004-09-13 2006-03-23 General Electric Co <Ge> 太陽光集中装置の光起電力モジュール
KR20070088221A (ko) * 2006-02-17 2007-08-29 강성탁 태양에너지 발전용 집광장치

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102436861A (zh) * 2011-12-07 2012-05-02 长春理工大学 多抛物面共焦x射线聚焦结构及设计方法

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WO2010050698A3 (fr) 2010-07-29

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