KR101770164B1 - Reflective element for condensing sun light with high efficiency - Google Patents
Reflective element for condensing sun light with high efficiency Download PDFInfo
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- KR101770164B1 KR101770164B1 KR1020150132193A KR20150132193A KR101770164B1 KR 101770164 B1 KR101770164 B1 KR 101770164B1 KR 1020150132193 A KR1020150132193 A KR 1020150132193A KR 20150132193 A KR20150132193 A KR 20150132193A KR 101770164 B1 KR101770164 B1 KR 101770164B1
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
- H01L31/0547—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
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- 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
- H02S20/00—Supporting structures for PV modules
- H02S20/10—Supporting structures directly fixed to the ground
-
- 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
-
- 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
-
- 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
Abstract
The present invention relates to a high-efficiency solar light collecting reflecting member, and more particularly, to a reflecting member for collecting solar light and reflecting sunlight to a solar cell plate. A solar panel facing the reflective portion and concentrating solar light reflected from the reflective portion and converting the sunlight into electrical energy; And a support for supporting and fixing the solar panel, wherein the reflection part has a shape of a concave mirror for reflecting solar light, and the concave part of the concave mirror is a concave mirror, And a plurality of concave mirrors having a short focal length are combined to form a continuous reflection area.
Description
The present invention relates to a reflective member for sunlight collecting with high efficiency, and more particularly to a reflecting member for sunlight collecting which has a shape of a reflecting portion so that the focal distance of reflected light becomes shorter toward the central portion of the reflecting portion.
In recent years, solar energy has become a major alternative to fossil energy, which is getting depleted. Unlike fossil energy, such solar energy has the advantage of preventing global warming due to the absence of carbon dioxide emission, and solar energy has an unlimited energy source of sun, which is superior to other energy means in terms of energy saving .
Such a solar energy generation system uses a method of collecting solar radiation energy to obtain electric energy by using heat energy recovered at a high temperature (250 to 1,200 ° C.) and driving power generation facilities, or using a solar cell There is a power generation method, and solar light can be directly converted into electric energy in the case of using a solar cell.
The photovoltaic power generation includes a solar cell plate, which is a photoelectric conversion device for converting solar energy into electric energy, and a solar light collecting plate for collecting sunlight and improving the efficiency. Such a solar cell generates electric energy And the size of the solar cell is very small. Therefore, a solar concentrator for gathering a wide range of sunlight is needed.
That is, since the area of the solar panel used in the apparatus for collecting and generating solar light has a constant area, in order to increase the amount of incident sunlight, sunlight incident on a larger area than the solar panel is collected by a light- A technique of collecting sunlight through a reflecting member such as a mirror and reflecting the sunlight to a solar panel has been developed and used.
Generally, a conventionally used solar concentrating reflection member can be constituted of a reflection part for reflecting incident sunlight to a solar panel and a solar panel for condensing sunlight reflected therefrom, The reflector has a larger area than the solar panel for collecting positive sunlight and has a concave mirror shape so that the sunlight incident on the reflector can be collected by the solar panel, The position of the solar panel in the member is provided in the vicinity of the focal point so as to be able to condense reflected sunlight reflected from the front surface of the concave mirror.
In more detail, a hemispherical mirror is generally used as the reflection part of the reflective member for solar light collecting at present, as shown in Fig.
In the case of such a hemispherical concave mirror reflection portion, the reflected light is reflected to pass through the focal point of the hemisphere, so that the reflected light can be concentrated on a specific portion in the vicinity of the focal point. In the case of the reflection portion that reflects the sunlight in this manner, The portion corresponding to the region of the solar cell that receives the reflected light that can be reflected from the portion A can not receive the reflected light and can utilize the region of the center portion of the solar cell In addition, the entire surface of the solar panel is not uniformly received. Depending on the position of the solar panel, a specific portion is heated by receiving reflected light, and the central portion is not subjected to reflected light. The temperature difference of the solar panel increases from the outer surface to the central portion of the solar panel Whereby again the temperature is reduced by the non-light-receiving region of the central portion, the solar panel has a problem that may be a reduction in PV efficiency such disadvantages as not being maintained the same temperature.
Further, in the case of the hemispherical concave mirror reflection portion, when reflected light from a reflection portion having a large area is condensed on a solar panel with a small area, the reflected light reflected from a portion far from the center of the reflection portion is condensed on the solar panel with a narrow area Has a difficult disadvantage.
As a conventional art of the solar light collecting reflecting member in the technical field of the present invention, Korean Unexamined Patent Application Publication No. 2010-0069246 (Jun. 24, 2010) discloses a solar light collecting apparatus, Reflection and refocusing of the sunlight reflected by the first reflecting portion through the mining means, and US Patent Application Publication No. 2010-0071768 (Mar. 25, 2010) discloses a technique of reflecting The sunlight reflected by the second reflector provided above the first reflector is focused on the solar panel located at the center of the first reflector.
However, in the prior art including the above-described prior art, it is considered that the above-described problem can not be solved by adopting a hemispherical reflecting portion. By receiving sunlight reflected from the reflecting member on all surfaces of the solar cell, There is a continuing need for the development of a reflective member for sun light condensing that makes the unused portion of the solar cell panel free from any excessive increase in the temperature of a specific portion of the solar cell panel, .
In order to solve the above-described problems, the present invention provides a solar cell in which solar cells reflected from a reflecting member are received by all the surfaces of the solar cell, thereby preventing an unused portion of the solar panel, And the total area of the solar panel is optimized so as to receive evenly reflected light.
It is still another object of the present invention to provide a solar light condensing device including at least one of the above-mentioned reflecting members.
According to an embodiment of the present invention, there is provided a solar light collecting reflecting member comprising: a reflecting unit that collects sunlight and reflects the solar light to the solar cell plate; A solar panel facing the reflective portion and concentrating solar light reflected from the reflective portion and converting the sunlight into electrical energy; And a support for supporting and fixing the solar panel, wherein the reflection part has a shape of a concave mirror for reflecting solar light, and the concave part of the concave mirror is a concave mirror, And concave mirrors having a shorter focal length are combined to form a continuous reflection area.
In one embodiment, the reflection section is divided into the reflection area including the mirror and the non-reflection area not including the mirror, the non-reflection area is formed at the center part of the reflection part, and the solar panel covers the sunlight So that sunlight is not reflected by the solar panel.
In one embodiment, the non-reflecting region has a size smaller than or equal to an area of the solar cell plate.
In one embodiment, the solar cell plate is characterized in that the distance from the uppermost end of the reflector is located at a greater distance than the focus of the sphere formed at the lowermost end of the reflector within the reflector.
In one embodiment, the solar panel includes a solar cell for receiving reflected sunlight and converting only reflected light, which is reflected by the reflecting portion, into electrical energy on only one side of the solar panel.
In one embodiment, the solar panel includes a solar cell whose both surfaces convert solar light into electric energy, the upper part receives solar light directly from the sun, and the lower part receives reflected light condensed from the reflecting part .
In one embodiment, the reflection area in the reflection part is characterized in that the reflection surface is coated with a transparent protective layer of glass or polymer resin to protect the reflection surface from the external environment.
In one embodiment, the reflected light of the uppermost portion of the reflection region in the reflection portion is reflected at one end of the solar panel, and the reflected light at the lowermost end of the reflection region is reflected to the opposite end of the solar panel.
In one embodiment, the solar panel has a circular or polygonal shape, and the solar light collecting reflecting member includes a holder for supporting the round or polygonal end of the solar panel, and the holder is coupled with the support .
In one embodiment, the reflective portion is in the form of a concave mirror including an outer surface of a cone, a polygonal horn, or a combination thereof.
The present invention also provides a solar light concentrating device including at least one or more of the above-described solar light collecting reflecting members.
The plurality of concave mirrors having a shorter focal length are continuously combined in the concave mirror toward the central portion of the concave mirror so that the sunlight reflected from the reflecting member is transmitted to all the solar cells including the central portion of the solar panel It is possible to provide a reflecting member for solar light collecting that is not received in the unused portion of the solar panel and is not excessively heated at a specific portion of the solar panel and is optimized to receive the reflected light evenly over the entire area of the solar panel have.
Further, when the area of the concave mirror corresponding to the reflection area of the reflection part is larger than the area of the solar cell plate, the solar light collecting reflection member according to the present invention effectively irradiates the solar cell panel with a large amount of light, There are advantages.
1 is a view for explaining a conventional solar light collecting reflecting member.
2 is a view for explaining a direction in which incident light incident vertically is reflected with respect to a focus of a concave mirror.
Fig. 3 is a view for explaining how the focal length varies according to the radius of the sphere forming the reflecting surface of the concave mirror.
4 is a view showing a concave mirror in which a part of spheres having different focal lengths are combined according to an embodiment of the present invention.
5 is a view for explaining a reflection unit of a solar light collecting reflecting member according to an embodiment of the present invention.
6 is a view for explaining a reflection unit having a polygonal pyramidal shape of a solar light collecting reflecting member according to an embodiment of the present invention.
7 is a view for explaining the size and position of the solar panel according to the solar light collecting reflective member according to the embodiment of the present invention.
8 is a view for explaining the size and position of a solar panel according to another embodiment of the present invention.
9 is a diagram for deriving condensed efficiency according to the size and position of the solar panel according to the solar light collecting reflecting member according to an embodiment of the present invention.
Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In general, the nomenclature used herein is well known and commonly used in the art.
Throughout this specification, when an element is referred to as including an element, it is understood that it may include other elements as well, without departing from the other elements unless specifically stated otherwise.
FIG. 2 is a view for explaining the direction in which incident light incident vertically is reflected toward the concave mirror. As shown in FIG. 2, the focal length f of the concave mirror is a distance Means a distance between a focal point (Focal point) formed by refraction and reflection after the irradiation light irradiated from the light source is incident on the reflecting surface of the concave mirror and the reflecting surface, As described above, the concave mirror is formed at a half of the radius from the center (C) of the sphere forming the curved surface of the concave mirror, and therefore, between the center of the sphere forming the concave mirror and the reflecting surface The radius of the sphere is twice the focal length.
As a result, when the focal length is shortened, the radius of the sphere forming the reflective surface of the concave mirror is also shortened, and the focal length is also increased when the sphere size is increased.
When such a principle is applied to the solar light collecting reflecting member of the present invention, it is possible to provide a new solar collecting reflecting member by designing the concave mirror to be continuously combined from the farthest to nearest .
This can be explained in more detail with reference to FIG. Fig. 3 is an illustration for explaining how the focal length varies according to the radius of a sphere forming a reflecting surface of a concave mirror. When concave mirrors with different focal lengths are stacked at the same position, The size of the sphere forming the reflection surface of the projection lens is shown.
Here, the red spheres have 80% of the black spheres radius and the green spheres have 60% of the black spheres radius. The focal length is proportional to the size of spheres forming the reflection surface in the concave mirror of the same size, ) Is in inverse proportion to the size of the sphere, the focal length of the concave mirror having the red sphere as the reflection surface is 80% of the focal length of the concave mirror corresponding to the black sphere, and the focal distance of the concave mirror corresponding to the green sphere is the black 60% of the focal length of the concave mirror corresponding to the sphere. Also, the depth of the concave mirror is the deepest concave mirror corresponding to the green circle, and the concave mirror corresponding to the black circle is the shallowest.
Therefore, if the reflective member is manufactured by connecting the spherical surfaces having different focal lengths in the concave mirror, as shown in FIG. 3, in the order of the longest to shortest focal lengths, It is possible to provide a new solar light collecting reflecting member having a focal length.
FIG. 4 is a view illustrating a concave mirror in which a part of spheres having different focal lengths are combined to explain a structure of a solar light collecting reflecting member according to an embodiment of the present invention. A conceptual structure of a reflector according to the present invention is shown, which is constituted by combining parts of spheres in the form of a combination of smaller radii.
That is, the concave mirror according to the structure shown in FIG. 4 is composed of a plurality of concave mirrors that are cut away by a certain distance in parallel with the diameter direction of the sphere in the order of smaller radii, and the focal length becomes shorter toward the center of the concave mirror When concave mirrors are combined to form a plurality of concave mirrors, when horizontally incident sunlight is reflected in a donut-shaped area corresponding to a spherical surface of a black color, it is reflected in a donut-shaped area corresponding to a red spherical surface The focus is formed at a farther distance than the case, and the reflected light from the spherical surface of the green sphere has the shortest focal distance and is reflected.
According to the present invention, it is possible to provide a structure for a solar light collecting reflecting member in which the concave mirror of the reflecting portion can continuously change the focal distance.
This will be described in more detail with reference to FIG.
FIG. 5 is a view for explaining a reflecting portion of a solar light collecting reflecting member according to an embodiment of the present invention, in which a focal length of a sphere in contact with a concave portion of a concave mirror in the reflecting portion is continuously changed , And the shape of the cone as a shape in which spherical surfaces having different focal lengths are continuous.
As shown in FIG. 5, the reflection region of the reflection portion has a structure in which the upper portion of the cone, which is the vertex portion of the cone, is cut in a horizontal direction on the bottom surface and has a trapezoidal shape in cross section, The central part of the apex side of the horn does not include a mirror as a non-reflecting area, so it may not reflect sunlight.
That is, in the reflection member of the present invention, the reflection portion may be divided into the reflection region including the mirror and the non-reflection region not including the mirror, and the non-reflection region may be located on the imaginary vertex of the cone And this portion is covered with the sunlight by the solar panel, so that the sunlight may not be reflected to the solar panel in the non-reflection area.
Here, the non-reflection area may have a size smaller than or equal to the area of the solar panel. If the area of the non-reflection area that does not include the mirror is larger than that of the solar panel, solar light that can be reflected by the area of the non-reflection area exceeding the area of the solar panel can not be reflected toward the solar panel, Because.
As shown in Fig. 5, the reflection member in the present invention has a shape in which the center portion of the cone is cut off as a reflection region, and may also include a cut central portion of the cone as a non-reflection region. In this case, since the sunlight is not reflected in the non-reflection area, it is not important that the shape of the reflection area is conical or the shape of the plane is formed by cutting the vertex part. In the present invention, It is a technical feature to have an outer surface of a horn.
That is, in the reflection area of the reflection member of the present invention, spheres having a larger radius become larger toward the outer side from the center, so that the focal distance thereof is further away from the center of the cone toward the outer side so that sunlight can be reflected, If the distance changes continuously, the shape of the concave mirror will be in the form of a cone or polygonal horn.
More specifically, the present invention relates to a solar light collecting reflecting member, comprising: a reflecting unit for collecting solar light and reflecting it to the solar cell plate; A solar panel facing the reflective portion and concentrating solar light reflected from the reflective portion and converting the sunlight into electrical energy; And a support for supporting and fixing the solar panel, wherein the reflection part has a shape of a concave mirror for reflecting solar light, and the concave part of the concave mirror is a concave mirror, And concave mirrors having a shorter focal length are combined to form a continuous reflection area.
In the case of the solar panel used in the present invention, any of infrared rays, visible rays and ultraviolet rays from outside can be reflected from the mirror surface in the reflection area without being blocked and converted into electric energy in the solar cell.
The solar panel may have a circular or polygonal shape, and preferably a circular or rectangular cross-section.
Further, in the solar panel of the present invention, only one surface of the solar panel may be used, or both surfaces may be used. That is, the solar panel in the solar light collecting reflective member may include a solar cell for converting reflected light, which is reflected from the reflecting portion, into electrical energy only on one side of the solar panel in order to receive reflected sunlight, And a solar cell that converts light into electrical energy, wherein the upper portion receives solar light directly from the sun, and the lower portion is configured to receive the reflected light condensed from the reflection portion.
The concave mirror of the concave mirror may include a plurality of concave mirrors having a shorter focal length toward the center of the concave mirror to form a continuous reflection area. .
5, the cone is reversed, the bottom surface of the cone is pointed at the vertex of the cone, and the top of the cone, which is the vertex of the cone, is cut in the horizontal direction on the bottom surface. And a gray-filled portion in the upper part of Fig. 5 is a reflection region in the present invention. The concave portion of the concave mirror is a concave mirror having a shorter focal distance toward the center of the concave mirror, Are combined to form a continuous form.
In addition, the central part of the cone except the gray part in FIG. 5 corresponds to the non-reflection area of the reflection part, and in the lower part of FIG. 5, the solar panel and the supporting part supporting the solar panel are shown.
Here, the support supports the solar panel and is located at an optimum position for receiving sunlight reflected from the reflector, so that the support can be separated from the reflector, Or the solar light collecting device including the solar light collecting reflecting member, so as to support the solar panel.
The support may be configured to directly support the end of the solar panel having a circular or polygonal shape or may have a holder for supporting the end of the solar panel having a circular or polygonal shape, Or may be a bonded structure. Also, it can be used without being limited to the type of the structure of the support, and it can be provided with any structure that can shield the solar light incident / reflected to the reflection part as much as possible.
In the meantime, the reflection portion in the reflection member of the present invention may include a concave mirror shape including an outer surface in which the reflection region is formed of a polygonal horn other than the conical shape or a structure in which the reflection region is combined.
FIG. 6 is a plan view of a reflective portion in the form of various polygonal pyramids, for explaining a reflective portion having a polygonal pyramid shape in the solar light collecting reflective member according to an embodiment of the present invention.
More specifically, Fig. 6 (a) shows the reflection part formed by octagonal pyramids, and Fig. 6 (b) shows the lower half of the cone and the upper part shows the octagonal pyramid. 6 (c) shows a reflection portion formed in a non-reflection area portion in a circular shape and an inner portion in an octagonal pyramid shape. FIG. 6 (d) Fig. 6 (e) is a reflection part formed by a hexagonal pyramid having asymmetric top and bottom parts, and Fig. 6 (f) is a reflection part formed by a quadrangular pyramid, Is formed as a curved surface like a partial surface of a cone and a non-reflecting area at the center.
In the present invention, the shape of the reflection part shown in FIG. 6 is merely intended to explain various designs using the cones and the polygonal horns in forming the reflection part, But is not limited to.
In addition, in the present invention, the reflective material constituting the reflective portion in the reflective member can be used without limitation as long as it is a material capable of reflecting incident light.
The reflector of the present invention is a concave mirror having a continuous reflection area by combining a plurality of concave mirrors having a short focal length as the concave part of the concave mirror is moved toward the central part in order to reflect the light irradiated from the external light source The reflective region in the reflective portion may be made of a mirror, but the reflective region is not limited thereto. The reflection region may be formed of a reflective metal, a metal oxide, a metal salt, or the like in order to reflect incident light. The surface of the part may be treated by a method such as coating.
On the other hand, the reflection portion in the reflection member may be coated with a transparent protective layer of glass or polymer resin to protect the reflection surface from the external environment. More specifically, a transparent protective layer of glass or a polymeric resin is coated on the surface of the reflective member using a method including a glass coating, a UV coating, a photocatalytic coating, a polymer coating such as PET, acrylic, PC, or a combination thereof By coating, the surface of the reflective portion of the reflective member can be protected from external environments including precipitation, snow, strong wind, dust, or the like.
7 is a view for explaining a structure of a solar light collecting reflective member according to an embodiment of the present invention. As shown in FIG. 7, the solar light collecting reflecting member of the present invention includes a reflecting unit located at the bottom of FIG. 7 for collecting sunlight and reflecting the sunlight to the solar cell plate, And a solar cell plate for converging sunlight reflected from the reflector and converting it into electric energy, and a support (not shown) for supporting and fixing the solar cell plate.
A non-reflecting area is located at a certain distance in a direction parallel to the solar panel, and the mirror is unnecessary because solar light is not incident on the solar panel because the solar panel does not. The non-reflection region has a structure in which the upper portion including the vertex is cut in a direction parallel to the bottom surface from the structure of the cone or polygonal horn, and the cross section has a trapezoidal structure.
Hereinafter, with reference to FIG. 7, a description will be made of the condensing mode of solar light according to the size of each of the reflection area, the position of the solar panel, and the reflection area of the reflection part in the present invention.
The reflecting portion of the solar light collecting reflective member in FIG. 7 has a conical shape and has a conical shape that is cut parallel to a central portion in the vicinity of the vertex of the conical portion in a direction parallel to the bottom surface, The radius of the solar panel is R, and the radius of the circle of the uppermost part of the reflection part (bottom surface of the cone) is W + R, the horizontal distance of the reflection area of the reflection part The incident sunlight vertically incident on the solar panel is shielded by the solar panel, so that only the area corresponding to the donut-shaped area A-1 shown below can function as a reflection area.
Sectional area of the reflection region = ((W + R) 2 - R 2 ) *? (Formula A-1)
Since concave mirrors having a shorter focal length from the uppermost end of the reflective region to the lowermost end of the reflective region in the reflective portion are formed by combining a plurality of concave mirrors having shorter focal lengths, So that the reflected light at the upper end (the bottom of the cone) of the reflection area in the reflection part has a much far focal distance as compared with the reflected light at the lowermost part (the cut part of the cone) of the reflection area.
Accordingly, in FIG. 7, the reflected light from the uppermost part (the bottom surface of the cone) of the reflection area in the reflection part is reflected at one end corresponding to the nearest edge of the solar panel, and the reflected light at the lowermost part of the reflection area is reflected at the farthest corner So that the sunlight reflected by the reflective portion can be uniformly reflected on the entire surface of the solar panel without loss and can be condensed.
That is, the sunlight (red line) incident on the uppermost end (the leftmost side) of the reflection region in FIG. 7 has the furthest focal length and can be reflected to the left end of the solar panel, Solar light (green line) incident on the lowermost end of the region (second from the left) has the shortest focal distance and can be reflected to the right end of the solar panel by being reflected. The reflected light at the uppermost end and the lowermost end of the reflection area in the right side of FIG. 7 is also reflected on the same principle.
At this time, the distance from the uppermost end of the reflector (the bottom of the cone) to the solar panel may be set to be longer than the focus (fb) of the sphere formed at the lowermost end of the reflection area within the reflector .
In addition, the solar panel may have a distance from the uppermost end of the reflector (the bottom of the cone) to a distance shorter than the focus (not shown) of the sphere formed at the uppermost end of the reflective area in the reflector. By maintaining the distance range of the solar panel, by appropriately adjusting the size of the solar panel and the size of the reflector according to the change of the central angle of the cone, it is possible to collect all the sunlight reflected by the reflection area in the present invention onto the solar panel have.
Generally, since the area of the reflective region of the reflective portion is larger than the area of the solar panel, the solar panel of the structure according to the present invention is irradiated with the sunlight more than the light irradiated to the solar panel by the external sunlight of the same area, Which can be more economical since it corresponds to the case where the number of solar power panels can be reduced and can be particularly useful on a day when the solar power is small.
For example, the half of the center angle of the cone has 60 degrees (? = 60 degrees), the radius of the solar panel is R, and the radius of the circle at the top of the reflector (the bottom of the cone) And the solar energy directly irradiated on the solar panel of radius R is 1, the solar energy value A condensed through the reflection area in the reflection member of the present invention is expressed by the following equation Follow the formula.
This relates to a simple area ratio derived from the value in the above formula A-1, which corresponds to the ratio of the cross-sectional area of the reflection area in the mirror to the area of the solar cell.
A =
That is, the amount of solar light that can be collected by the solar cell can be determined simply by the reflection area of the mirror and the area of the solar cell.
Hereinafter, the following formula A-2 (
This can be obtained through the variable values and angle values shown in FIG. 9, and the derivation thereof is as follows. Here, when the incident light reaches the mirror surface, the angle between the incident light and the reflected light is 2? When a vertical line is drawn on the mirror surface.
In the induction process
As shown in FIG. 9, as the central angle (2?) Of the cone or polygonal horn of the reflection part in the reflection member according to the present invention becomes larger, the
For reference, the central angle (2?) Of the cone of the reflection portion in the reflective member according to the present invention should be at least 90 degrees. If the angle of the cone vertex is 90 degrees, the sunlight perpendicular to the cross section of the reflector is reflected with a 90 degree reflection angle toward the center of the reflector. If the angle of the cone vertex is 90 degrees or less, The solar light beam perpendicularly incident on the solar cell can not be installed so as to condense the reflected light because the solar light is reflected from the inside of the reflection portion toward the center of the reflection portion without being reflected from the outside of the reflection portion.
In the present invention, preferably, the half angle of the center angle is preferably 53 degrees or more, more preferably 55 degrees or more, still more preferably 57 degrees or more, and further preferably 59 degrees or more .
In one embodiment of the present invention, θ, W, R + W, and energy ratio values in the case of R = 0.5 in the relationship according to FIG. 9 are calculated as shown in Table 1 below. (Where a = W / R)
That is, in the case of R = W, the reflection condition for causing all of the reflected light reflected by the reflection area according to FIG. 7 to be reflected without loss on the solar cell surface is 60 degrees (? = 60 degrees) At this time, the solar energy collected by the solar panel through the reflection region can be three times as much as the energy directly irradiated to the solar panel, so that the efficiency of one ordinary solar panel is three times as much as the energy obtained from the direct light, Can gather.
According to the calculation according to the present invention, as the radius increases, the concave mirror gets closer to the flat plate. In order to collect the solar energy without loss, the solar panel must rise from the mirror to a higher position. Theoretically, a is 1.95, When the angle is 83.58 degrees, energy can be concentrated 7.70 times.
8 is a view for explaining the size and position of the solar panel according to another embodiment of the present invention. In the extreme case where W is slightly smaller than 2R And the reflection light in the reflection area in the reflection member of the reflection member is reflected to the solar cell plate.
In the meantime, according to the present invention, the solar light collecting reflecting member can be formed as one solar panel, and the solar light collecting device for modulating the solar collecting light reflecting member to include one or a plurality of solar collecting reflecting members, .
In addition, the solar light collecting reflector may be designed to be rotatable in four directions so that it can further include a reflector position adjuster (not shown) so as to follow the position of the sun in accordance with the azimuth and elevation angle of the sun have
For example, the reflector position adjusting device may include a solar sensor for sensing a change in the position of the sun, a controller for controlling the attitude of the solar light collecting reflector including the reflector based on the signal sensed by the solar sensor, And a posture controlling supporter that rotates the solar light collecting reflecting member in four directions using a hydraulic or pneumatic driving device in accordance with a control signal from the control unit, And it is possible to control the attitude control of the reflector in real time by sensing the change of the sun with time.
In addition, as an application of the present invention, the reflection member according to the present invention can be installed on a ship such as a container ship, or installed on a small-sized aircraft that uses a battery like a drone and has a low speed.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.
Claims (11)
A solar panel facing the reflective portion and concentrating solar light reflected from the reflective portion and converting the sunlight into electrical energy; And
And a support base for supporting and fixing the solar panel,
Wherein the concave portion of the concave mirror includes a plurality of concave mirrors having a short focal length and a continuous reflection region in a form of a continuous combination of the plurality of concave mirrors toward the center of the concave mirror, ,
Wherein the solar cell plate has a distance from the uppermost end of the reflecting portion to a farther distance than a focus of a sphere formed at the lowermost end of the reflecting region in the reflecting portion.
The reflection unit is divided into the reflection area including the mirror and the non-reflection area not including the mirror,
Wherein the non-reflecting region is formed at a central portion of the reflecting portion, and sunlight is blocked by the solar cell plate so that sunlight is not reflected to the solar panel.
Wherein the non-reflecting region has a size smaller than or equal to an area of the solar cell plate.
Wherein the solar panel includes a solar cell for converting reflected light reflected by the reflection portion into electrical energy only on one side of the solar panel in order to receive the reflected sunlight.
Wherein the solar cell plate includes a solar cell whose both surfaces convert solar light into electric energy, the upper portion receives solar light directly from the sun, and the lower portion receives reflected light condensed from the reflection portion, .
Wherein the reflection area in the reflection part is coated with a transparent protective layer of glass or polymer resin to protect the reflection surface from the external environment.
Characterized in that the reflected light of the uppermost portion of the reflection region in the reflection portion is reflected to one end of the solar panel and the reflected light of the lowermost portion of the reflection region is reflected to the opposite opposite end of the solar panel, .
The solar panel has a circular or polygonal shape,
Wherein the solar light collecting reflecting member includes a holder for supporting a round or polygonal end of the solar panel, and the holder is coupled to the supporting member.
Wherein the reflective portion is in the form of a concave mirror including an outer surface made of a cone, a polygonal horn, or a combination thereof.
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| KR1020150132193A KR101770164B1 (en) | 2015-09-18 | 2015-09-18 | Reflective element for condensing sun light with high efficiency |
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| KR1020150132193A KR101770164B1 (en) | 2015-09-18 | 2015-09-18 | Reflective element for condensing sun light with high efficiency |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20190096263A (en) | 2018-06-18 | 2019-08-19 | 주식회사 린피니티 | A Photovoltaic Generating Module Using Light Concentrating Apparatus |
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| WO2023027206A1 (en) * | 2021-08-24 | 2023-03-02 | 주식회사 세기종합환경 | Photovoltaic power generating apparatus |
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| KR20100069246A (en) | 2008-12-16 | 2010-06-24 | 김영호 | Apparatus for collecting solar energy |
| KR101147693B1 (en) | 2008-12-19 | 2012-05-22 | 한국생명공학연구원 | The selection device for clinical examination candidates using SNP and genomic information from ADME region of the genome. |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20190096263A (en) | 2018-06-18 | 2019-08-19 | 주식회사 린피니티 | A Photovoltaic Generating Module Using Light Concentrating Apparatus |
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