WO2009008644A2 - Reflector module of solar concentrator - Google Patents

Reflector module of solar concentrator Download PDF

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Publication number
WO2009008644A2
WO2009008644A2 PCT/KR2008/003979 KR2008003979W WO2009008644A2 WO 2009008644 A2 WO2009008644 A2 WO 2009008644A2 KR 2008003979 W KR2008003979 W KR 2008003979W WO 2009008644 A2 WO2009008644 A2 WO 2009008644A2
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WO
WIPO (PCT)
Prior art keywords
reflector
frame
reflecting
condensing
solar concentrator
Prior art date
Application number
PCT/KR2008/003979
Other languages
French (fr)
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WO2009008644A3 (en
Inventor
Cheol Soo Kim
Original Assignee
Cheol Soo Kim
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Publication date
Application filed by Cheol Soo Kim filed Critical Cheol Soo Kim
Publication of WO2009008644A2 publication Critical patent/WO2009008644A2/en
Publication of WO2009008644A3 publication Critical patent/WO2009008644A3/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S30/00—Arrangements for moving or orienting solar heat collector modules
    • F24S30/40—Arrangements for moving or orienting solar heat collector modules for rotary movement
    • F24S30/45—Arrangements for moving or orienting solar heat collector modules for rotary movement with two rotation axes
    • F24S30/452—Vertical primary axis
    • 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
    • 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
    • Y02E10/47—Mountings or tracking

Definitions

  • the present invention relates, in general, to a reflector which is used to concentrate the light of a solar concentrator which is intended to produce power or heat water using the energy of highly concentrated sunlight and, more particularly, to a reflector of a solar concentrator, which comprises reflector modules which are connected to each other, each of the reflector modules including a thin reflecting plate and a reflecting frame having a predetermined curvature and supporting the reflector plate, and in which the respective reflector modules form independent focal points having different focal distances, and are adjustable such that all of the focal points overlap at a light receiving part, thus acquiring a high concentration ratio and enabling the easy manufacture and maintenance of the reflector.
  • one conventional solar concentrator is constructed to concentrate sunlight on a focal part using a parabolic- or dish-shaped reflecting mirror or plate.
  • the solar concentrator includes a base frame for supporting the concentrator.
  • a longitude adjusting frame is fastened to the upper portion of the base frame in such a way as to rotate leftwards and rightwards according to the variation of the longitude of the sun.
  • a condensing frame is fastened to the longitude adjusting frame in such a way as to rotate up and down according to the variation of the altitude of the sun.
  • the lower end of the condensing frame supports a reflector, and a light receiving part is installed at the upper end of the condensing frame.
  • the reflector has the shape of a parabola having a predetermined area, is detachably mounted to the lower end of the condensing frame, and reflects sunlight so that the sunlight is concentrated on the light receiving part which is installed at an upper end of the condensing frame corresponding to a focal part of the parabola.
  • the solar concentrator is rotated leftwards or rightwards and upwards or downwards, thus increasing the reflected amount and sunlight concentrating efficiency.
  • the reflector is constructed so that a plurality of reflecting plates each having the curved shape of part of a three-dimensional parabola is attached to the condensing frame, thus forming one large parabolic surface such that the entire reflector has a circular or rectangular outer contour. Thereby, one focal point is formed, so that the sunlight is concentrated on the focal part at high density.
  • the reflecting mirror made of metal or glass is machined to have a parabolic surface, thus providing a rectangular or circular contour, the process is complicated, defective ratio and manufacturing costs are high, and mass production is difficult. Thus, economic efficiency is low.
  • a reflector of a solar concentrator for overcoming the problem is disclosed in Korean Patent Laid-Open Publication No.
  • a body of a parabolic condensing unit is formed through casting using a foaming high molecular material. Thereafter, thin metal reflecting plates which are polished are secured to the concave front of the body. Such a reflector enables mass production at lower costs.
  • the solar concentrator has the shape of one parabola, thus forming one focal point.
  • the body of the parabolic condensing unit must be precisely formed, and each reflecting plate must be precisely attached to the condensing unit body, so that a manufacturing operation is not easy.
  • the body of the parabolic condensing unit is made of a foaming high molecular material.
  • the reflector of the solar concentrator has a size sufficient to have economic efficiency while generating power or supplying hot water to homes, the focal point is easily changed and the concentrating efficiency is reduced because of external physical shocks, such as weight or wind pressure, the exposure to high temperature for a lengthy period of time, or the deformation occurring after foaming.
  • an object of the present invention is to provide a reflector of a solar concentrator, which comprises reflector modules which are connected to each other, each of the reflector modules including a thin reflecting plate and a reflecting frame having a predetermined curvature and supporting the reflector plate, and in which the respective reflector modules form independent focal points having different focal distances, and are adjustable such that all of the focal points are overlapped at a light receiving part, thus acquiring a high concentration ratio and enabling the easy manufacture and maintenance of the reflector.
  • the present invention provides a reflector of a solar concentrator for concentrating sunlight reflected from the reflector which has a shape of a parabola having a predetermined area and is detachably mounted to a lower portion of a condensing frame, on a light receiving part which is installed at an upper portion of the condensing frame corresponding to a focal part of the parabola, the reflector comprising a plurality of reflector modules connected to each other, each of the reflector modules including a reflecting frame formed such that the reflecting frame is narrow and long and a front thereof is concave inwards, thus having a shape of an arc having a predetermined curvature, and fastened to the lower portion of the condensing frame in such a way as to be rotated leftwards and rightwards by a rotary fastening part; and a reflecting plate having a shape of a thin plate, and locked to the front of the reflecting frame via locking means.
  • the reflecting frame includes left and right sidewalls, and a plurality of spacers inserted between the sidewalls at predetermined intervals.
  • the reflecting frame is manufactured or formed using any one of metal, synthetic resin, and foaming concrete.
  • the rotary fastening part is fastened at an upper end thereof to a lower portion of the reflecting frame, and is fastened at a lower end thereof to the condensing frame via a fastening bolt.
  • a reflector of a solar concentrator comprises reflector modules which are connected to each other, each of the reflector modules including a reflecting plate having the shape of a thin plate and a reflecting frame having a predetermined curvature and supporting the reflector plate, and the respective reflector modules have independent focal points and different focal distances, and the angles of attachment of the respective reflector modules are adjustable such that all of the focal points overlap at a light receiving part, thus easily condensing light at a high density, overcoming the technical difficulty of forming each reflecting plate of an existing parabolic- or dish-shaped solar concentrator, enabling the manufacture and maintenance of economically viable reflector modules at lower costs, coping with the depletion of fossil energy and global warming and contributing to protection of the environment.
  • FIG. 1 is a perspective view illustrating a solar concentrator according to the present invention, in which a reflector is detachably mounted to the concentrator;
  • FIG. 2 is of perspective views illustrating parts of an individual reflector module according to the present invention.
  • FIG. 3 is a perspective view illustrating the state in which the individual reflector module according to the present invention is fastened to the lower portion of a condensing frame.
  • FIG. 1 is a perspective view illustrating a solar concentrator according to the present invention, in which a reflector is detachably mounted to the solar concentrator.
  • the present invention is intended to improve a reflector module of the solar concentrator, which includes a reflecting plate and a reflecting frame.
  • the solar concentrator includes a base frame 10 for supporting the concentrator.
  • a longitude adjusting frame 20 is fastened to the upper portion of the base frame 10 in such a way as to rotate leftwards and rightwards according to the variation of the longitude of the sun.
  • a condensing frame 30 is fastened to the longitude adjusting frame 20 in such a way as to rotate up and down according to variations in the altitude of the sun, and a lower portion 31 of the condensing frame 30 supports the reflector.
  • the reflector has the shape of a parabola of a predetermined area, is detachably mounted to the lower portion 31 of the condensing frame 30, and reflects sunlight so that the sunlight is con- centrated on a light receiving part 40 which is installed at an upper portion 32 of the condensing frame 30 corresponding to a focal part of the parabola.
  • the condensing frame 30 is coupled to the longitude adjusting frame 20 via an altitude central shaft, and the longitude adjusting frame 20 is coupled to the base frame 10 via a longitude central shaft, thus moving in response to the variation of the longitude and altitude of the sun.
  • a solar tracking system is additionally provided.
  • heat of high temperature is acquired through the sunlight concentrated on the light receiving part 40, and passes through a heat exchanger to obtain hot water or generate vapor of high pressure, thus generating electricity.
  • the reflector includes a plurality of individual reflector modules 100 which are connected to each other to have a desired area.
  • Each individual reflector module includes a reflecting frame and a reflecting plate.
  • the reflecting frame 110 is narrow and long, and the front of the reflecting frame is curved inwards to have the shape of an arc having a predetermined curvature.
  • the reflecting frame is fastened to the lower portion 31 of the condensing frame 30 in such a way as to be rotated leftwards and rightwards by rotary fastening parts 130.
  • the reflecting plate 120 has the shape of a thin plate which is locked to the front of the reflecting frame 110 via a locking means.
  • the reflecting plates 120 have independent focal distances and focal points, but all focal points are concentrated on the light receiving part 40.
  • the reflector of the solar concentrator according to the present invention comprises a plurality of reflector modules 100 which are connected to each other to have a desired area.
  • Each of the reflector modules includes the individual reflecting frame 110 which is narrow and long, is concave inwards at the front to have the shape of an arc of a predetermined curvature, and is fastened to the lower portion 31 of the condensing frame 30 by the rotary fastening parts 130 in such a way as to be rotated to the left and to the right, and the individual reflecting plate 120 which has the shape of a narrow and long strip and is locked to the front of the reflecting frame 110 via one or more locking means.
  • the individual reflecting frame 110 serves to support the individual reflecting plate 120.
  • the front of the individual reflecting frame is concave inwards, thus having the shape of an arc.
  • the individual reflecting frame may be manufactured or formed using any one of metal, foaming concrete, and synthetic resin. In order to more reliably and firmly support the individual reflecting plate 120, the individual reflecting frame is more preferably made of metal.
  • the curvature of the individual reflecting frame 110 is determined in consideration of a desired size of the concentrator and the distance between the reflector module and the light receiving part 40.
  • the individual reflecting frame 110 is preferably constructed so that side walls 111 and 11 l'having the same shape are provided on the left and right sides of the reflecting frame and spacers 112 are inserted between the side walls 111 and 11 Tat predetermined intervals to define space having a predetermined width therebetween.
  • the individual reflecting frame may be constructed such that the side walls and the spacers are integrated into a single structure.
  • the width of the individual reflecting frame 110 is determined such that it does not exceed the width of the individual reflecting plate 120 and such that it reliably supports the width of the individual reflecting plate 120.
  • the individual reflecting plate 120 is manufactured using a thin metal plate which is polished so as to increase reflecting ability, and is locked to the concave front of the individual reflecting frame 110 having the parabolic shape via the locking means.
  • the locking means may be a bolt, an adhesive, or spot welding.
  • spot welding is used to firmly couple the individual reflecting plate 120 to the individual reflecting frame 110 and prevent deformation after the coupling of the reflecting plate with the reflecting frame.
  • two or more individual reflecting plates 120 connected to each other in a longitudinal direction may be locked to the front of the individual reflecting frame 110.
  • the individual reflector module 100 includes the individual reflecting plate
  • the individual reflecting frame 110 is rotatably fastened to the lower portion 31 of the condensing frame 30 via the rotary fastening parts 130.
  • the rotary fastening parts 130 may be also embodied in various ways. According to the representative example, each rotary fastening part 130 is fastened at the upper end thereof to the lower portion of the individual reflecting frame 110, and is fastened at the lower end thereof to the condensing frame 30 via a fastening bolt, so that the individual reflector module 100 is completely supported by the condensing frame 30. Further, if necessary, the fastening bolt is loosened to be rotated at a predetermined angle, thus easily adjusting the focal position of the individual reflector module 100.
  • two rotary fastening parts 130 are spaced apart from each other by a predetermined distance to fasten one individual reflecting frame 110 to the condensing frame 30. If the rotary fastening part 130 is one, the stability of the individual reflector module 100 is low. Further, if the rotary fastening part 130 is three or more, it is difficult to adjust the angle at which the individual reflector module 100 is attached.
  • the lower portion 31 of the condensing frame 30 has a predetermined width so as to reliably support the individual reflector module 100.
  • the reflector according to the present invention comprises the reflector modules 100, each of which is constructed so that the individual reflecting plate 120 has the shape of a narrow, flat, and thin strip and is locked to the individual reflecting frame 110 having a parabolic shape.
  • the individual reflector modules 100 are connected to each other, thus providing a reflector having a desired size, therefore affording the easy manufacture and mass production of the reflector. Further, it is possible to easily adjust the respective reflector modules 100 such that they have independent focal points and the focal points overlap at the light receiving part 40, thus acquiring a high concentration ratio and allowing easy replacement when the reflector becomes partially broken or deformed.

Abstract

Disclosed herein is a reflector used to concentrate the light of a solar concentrator which is intended to produce power or heat water using the energy of highly concentrated sunlight. The reflector of the solar concentrator includes reflector modules which are connected to each other. Each of the reflector modules includes a thin reflecting plate and a reflecting frame which has a predetermined curvature and supports the reflector plate. The respective reflector modules form independent focal points having different focal distances, and are adjustable such that all of the focal points overlap at a light receiving part, thus acquiring a high concentration ratio and enabling the easy manufacture and maintenance of the reflector.

Description

Description
REFLECTOR MODULE OF SOLAR CONCENTRATOR
Technical Field
[1] The present invention relates, in general, to a reflector which is used to concentrate the light of a solar concentrator which is intended to produce power or heat water using the energy of highly concentrated sunlight and, more particularly, to a reflector of a solar concentrator, which comprises reflector modules which are connected to each other, each of the reflector modules including a thin reflecting plate and a reflecting frame having a predetermined curvature and supporting the reflector plate, and in which the respective reflector modules form independent focal points having different focal distances, and are adjustable such that all of the focal points overlap at a light receiving part, thus acquiring a high concentration ratio and enabling the easy manufacture and maintenance of the reflector. Background Art
[2] Generally, sunlight is the most promising and preferable of the next generation clean alternative energy sources, because of their non-polluting properties and the infinite quantity of sunlight available. Extensive research into sunlight has been carried out for such things as heating a house, supplying hot water, and producing power using the heat energy of the sunlight. However, the energy density of the sunlight radiated onto the earth is low. Thus, in order to industrially utilize the sunlight, the sunlight must be concentrated on one spot using a solar concentrator so that the density of the sunlight is increased. The production of the solar concentrator is determined in consideration of practicality and economic efficiency depending on the concentration amount and concentration ratio.
[3] Traditionally, various shapes and kinds of solar concentrators have been developed.
Among them, one conventional solar concentrator is constructed to concentrate sunlight on a focal part using a parabolic- or dish-shaped reflecting mirror or plate. The solar concentrator includes a base frame for supporting the concentrator. A longitude adjusting frame is fastened to the upper portion of the base frame in such a way as to rotate leftwards and rightwards according to the variation of the longitude of the sun. A condensing frame is fastened to the longitude adjusting frame in such a way as to rotate up and down according to the variation of the altitude of the sun. The lower end of the condensing frame supports a reflector, and a light receiving part is installed at the upper end of the condensing frame. The reflector has the shape of a parabola having a predetermined area, is detachably mounted to the lower end of the condensing frame, and reflects sunlight so that the sunlight is concentrated on the light receiving part which is installed at an upper end of the condensing frame corresponding to a focal part of the parabola. Thus, according to the variation of the longitude and altitude of the sun, the solar concentrator is rotated leftwards or rightwards and upwards or downwards, thus increasing the reflected amount and sunlight concentrating efficiency.
[4] However, in the conventional solar concentrator, the reflector is constructed so that a plurality of reflecting plates each having the curved shape of part of a three-dimensional parabola is attached to the condensing frame, thus forming one large parabolic surface such that the entire reflector has a circular or rectangular outer contour. Thereby, one focal point is formed, so that the sunlight is concentrated on the focal part at high density. However, when the reflecting mirror made of metal or glass is machined to have a parabolic surface, thus providing a rectangular or circular contour, the process is complicated, defective ratio and manufacturing costs are high, and mass production is difficult. Thus, economic efficiency is low. Recently, a reflector of a solar concentrator for overcoming the problem is disclosed in Korean Patent Laid-Open Publication No. 2006-0027287. According to the cited document, a body of a parabolic condensing unit, the front of which is concave rearwards, is formed through casting using a foaming high molecular material. Thereafter, thin metal reflecting plates which are polished are secured to the concave front of the body. Such a reflector enables mass production at lower costs.
[5] However, the solar concentrator has the shape of one parabola, thus forming one focal point. Thus, the body of the parabolic condensing unit must be precisely formed, and each reflecting plate must be precisely attached to the condensing unit body, so that a manufacturing operation is not easy. The body of the parabolic condensing unit is made of a foaming high molecular material. Thus, the reflector of the solar concentrator has a size sufficient to have economic efficiency while generating power or supplying hot water to homes, the focal point is easily changed and the concentrating efficiency is reduced because of external physical shocks, such as weight or wind pressure, the exposure to high temperature for a lengthy period of time, or the deformation occurring after foaming. In order to overcome the problem, an additional precise process is required on the surface of the parabola, and great expenses are incurred for the repairs. Further, it is very difficult to precisely attach each reflecting plate to a reflecting frame in the shape of one large parabola. Moreover, since the foaming high molecular material is low in the density of particles and strength, it is difficult to directly attach the reflecting plate to the body of the parabolic condensing unit.
Disclosure of Invention Technical Problem [6] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a reflector of a solar concentrator, which comprises reflector modules which are connected to each other, each of the reflector modules including a thin reflecting plate and a reflecting frame having a predetermined curvature and supporting the reflector plate, and in which the respective reflector modules form independent focal points having different focal distances, and are adjustable such that all of the focal points are overlapped at a light receiving part, thus acquiring a high concentration ratio and enabling the easy manufacture and maintenance of the reflector. Technical Solution
[7] In order to accomplish the above object, the present invention provides a reflector of a solar concentrator for concentrating sunlight reflected from the reflector which has a shape of a parabola having a predetermined area and is detachably mounted to a lower portion of a condensing frame, on a light receiving part which is installed at an upper portion of the condensing frame corresponding to a focal part of the parabola, the reflector comprising a plurality of reflector modules connected to each other, each of the reflector modules including a reflecting frame formed such that the reflecting frame is narrow and long and a front thereof is concave inwards, thus having a shape of an arc having a predetermined curvature, and fastened to the lower portion of the condensing frame in such a way as to be rotated leftwards and rightwards by a rotary fastening part; and a reflecting plate having a shape of a thin plate, and locked to the front of the reflecting frame via locking means.
[8] The reflecting frame includes left and right sidewalls, and a plurality of spacers inserted between the sidewalls at predetermined intervals.
[9] The reflecting frame is manufactured or formed using any one of metal, synthetic resin, and foaming concrete.
[10] Further, the rotary fastening part is fastened at an upper end thereof to a lower portion of the reflecting frame, and is fastened at a lower end thereof to the condensing frame via a fastening bolt.
Advantageous Effects
[11] According to the present invention, a reflector of a solar concentrator comprises reflector modules which are connected to each other, each of the reflector modules including a reflecting plate having the shape of a thin plate and a reflecting frame having a predetermined curvature and supporting the reflector plate, and the respective reflector modules have independent focal points and different focal distances, and the angles of attachment of the respective reflector modules are adjustable such that all of the focal points overlap at a light receiving part, thus easily condensing light at a high density, overcoming the technical difficulty of forming each reflecting plate of an existing parabolic- or dish-shaped solar concentrator, enabling the manufacture and maintenance of economically viable reflector modules at lower costs, coping with the depletion of fossil energy and global warming and contributing to protection of the environment. Brief Description of the Drawings
[12] FIG. 1 is a perspective view illustrating a solar concentrator according to the present invention, in which a reflector is detachably mounted to the concentrator;
[13] FIG. 2 is of perspective views illustrating parts of an individual reflector module according to the present invention; and
[14] FIG. 3 is a perspective view illustrating the state in which the individual reflector module according to the present invention is fastened to the lower portion of a condensing frame.
[15] <Description of reference characters of important parts>
[16] 10: base frame 20: longitude adjusting frame
[17] 30: condensing frame 31 : lower portion of condensing frame
[18] 32: upper portion of condensing frame
[19] 40: light receiving part
[20] 100: individual reflector module
[21] 110: individual reflecting frame
[22] 111,111': side wall 112: spacer
[23] 120: individual reflecting plate 130: rotary fastening part
Best Mode for Carrying Out the Invention
[24] Hereinafter, the construction and operation of the present invention will be described in detail with reference to the accompanying drawings.
[25] FIG. 1 is a perspective view illustrating a solar concentrator according to the present invention, in which a reflector is detachably mounted to the solar concentrator. The present invention is intended to improve a reflector module of the solar concentrator, which includes a reflecting plate and a reflecting frame. The solar concentrator includes a base frame 10 for supporting the concentrator. A longitude adjusting frame 20 is fastened to the upper portion of the base frame 10 in such a way as to rotate leftwards and rightwards according to the variation of the longitude of the sun. A condensing frame 30 is fastened to the longitude adjusting frame 20 in such a way as to rotate up and down according to variations in the altitude of the sun, and a lower portion 31 of the condensing frame 30 supports the reflector. The reflector has the shape of a parabola of a predetermined area, is detachably mounted to the lower portion 31 of the condensing frame 30, and reflects sunlight so that the sunlight is con- centrated on a light receiving part 40 which is installed at an upper portion 32 of the condensing frame 30 corresponding to a focal part of the parabola. Thus, according to the variation of the longitude and altitude of the sun, the solar concentrator is rotated leftwards or rightwards and upwards or downwards, thus increasing the reflected amount and sunlight concentrating efficiency.
[26] Here, the condensing frame 30 is coupled to the longitude adjusting frame 20 via an altitude central shaft, and the longitude adjusting frame 20 is coupled to the base frame 10 via a longitude central shaft, thus moving in response to the variation of the longitude and altitude of the sun. Although not shown in the drawings, generally, a solar tracking system is additionally provided.
[27] Further, heat of high temperature is acquired through the sunlight concentrated on the light receiving part 40, and passes through a heat exchanger to obtain hot water or generate vapor of high pressure, thus generating electricity.
[28] According to the present invention, the reflector includes a plurality of individual reflector modules 100 which are connected to each other to have a desired area. Each individual reflector module includes a reflecting frame and a reflecting plate. The reflecting frame 110 is narrow and long, and the front of the reflecting frame is curved inwards to have the shape of an arc having a predetermined curvature. The reflecting frame is fastened to the lower portion 31 of the condensing frame 30 in such a way as to be rotated leftwards and rightwards by rotary fastening parts 130. The reflecting plate 120 has the shape of a thin plate which is locked to the front of the reflecting frame 110 via a locking means. In the reflector of this invention, the reflecting plates 120 have independent focal distances and focal points, but all focal points are concentrated on the light receiving part 40.
[29] Various embodiments are possible for the individual reflecting plate 120 and the individual reflecting frame 110 of the individual reflector module 100 which is the most important feature of the present invention, and the rotary fastening parts 130 for rotatably fastening the reflecting frame 110 to the condensing frame 30, but the representative examples will be described below.
[30] As shown in FIGS. 2a and 2b, the reflector of the solar concentrator according to the present invention comprises a plurality of reflector modules 100 which are connected to each other to have a desired area. Each of the reflector modules includes the individual reflecting frame 110 which is narrow and long, is concave inwards at the front to have the shape of an arc of a predetermined curvature, and is fastened to the lower portion 31 of the condensing frame 30 by the rotary fastening parts 130 in such a way as to be rotated to the left and to the right, and the individual reflecting plate 120 which has the shape of a narrow and long strip and is locked to the front of the reflecting frame 110 via one or more locking means. [31] Here, the individual reflecting frame 110 serves to support the individual reflecting plate 120. As shown in FIG. 2c, the front of the individual reflecting frame is concave inwards, thus having the shape of an arc. The individual reflecting frame may be manufactured or formed using any one of metal, foaming concrete, and synthetic resin. In order to more reliably and firmly support the individual reflecting plate 120, the individual reflecting frame is more preferably made of metal.
[32] Further, the curvature of the individual reflecting frame 110 is determined in consideration of a desired size of the concentrator and the distance between the reflector module and the light receiving part 40.
[33] As shown in FIG. 2c, the individual reflecting frame 110 is preferably constructed so that side walls 111 and 11 l'having the same shape are provided on the left and right sides of the reflecting frame and spacers 112 are inserted between the side walls 111 and 11 Tat predetermined intervals to define space having a predetermined width therebetween. Such a construction reduces the weight of the concentrator and the consumption of materials. However, if necessary, the individual reflecting frame may be constructed such that the side walls and the spacers are integrated into a single structure. Further, the width of the individual reflecting frame 110 is determined such that it does not exceed the width of the individual reflecting plate 120 and such that it reliably supports the width of the individual reflecting plate 120.
[34] The individual reflecting plate 120 is manufactured using a thin metal plate which is polished so as to increase reflecting ability, and is locked to the concave front of the individual reflecting frame 110 having the parabolic shape via the locking means. Here, the locking means may be a bolt, an adhesive, or spot welding. Preferably, spot welding is used to firmly couple the individual reflecting plate 120 to the individual reflecting frame 110 and prevent deformation after the coupling of the reflecting plate with the reflecting frame. For the convenient manufacture of the individual reflector module 100, two or more individual reflecting plates 120 connected to each other in a longitudinal direction may be locked to the front of the individual reflecting frame 110.
[35] As such, the individual reflector module 100 includes the individual reflecting plate
120 and the individual reflecting frame 110, which are in close contact with and coupled to each other, thus generating the shape of a parabola having an independent focal point.
[36] The individual reflecting frame 110 is rotatably fastened to the lower portion 31 of the condensing frame 30 via the rotary fastening parts 130. The rotary fastening parts 130 may be also embodied in various ways. According to the representative example, each rotary fastening part 130 is fastened at the upper end thereof to the lower portion of the individual reflecting frame 110, and is fastened at the lower end thereof to the condensing frame 30 via a fastening bolt, so that the individual reflector module 100 is completely supported by the condensing frame 30. Further, if necessary, the fastening bolt is loosened to be rotated at a predetermined angle, thus easily adjusting the focal position of the individual reflector module 100.
[37] Preferably, two rotary fastening parts 130 are spaced apart from each other by a predetermined distance to fasten one individual reflecting frame 110 to the condensing frame 30. If the rotary fastening part 130 is one, the stability of the individual reflector module 100 is low. Further, if the rotary fastening part 130 is three or more, it is difficult to adjust the angle at which the individual reflector module 100 is attached.
[38] Preferably, the lower portion 31 of the condensing frame 30 has a predetermined width so as to reliably support the individual reflector module 100.
[39] As described above, the reflector according to the present invention comprises the reflector modules 100, each of which is constructed so that the individual reflecting plate 120 has the shape of a narrow, flat, and thin strip and is locked to the individual reflecting frame 110 having a parabolic shape. The individual reflector modules 100 are connected to each other, thus providing a reflector having a desired size, therefore affording the easy manufacture and mass production of the reflector. Further, it is possible to easily adjust the respective reflector modules 100 such that they have independent focal points and the focal points overlap at the light receiving part 40, thus acquiring a high concentration ratio and allowing easy replacement when the reflector becomes partially broken or deformed.
[40]

Claims

Claims
[1] A reflector of a solar concentrator for concentrating sunlight reflected from the reflector which has a shape of a parabola having a predetermined area and is detachably mounted to a lower portion of a condensing frame, on a light receiving part which is installed at an upper portion of the condensing frame corresponding to a focal part of the parabola, the reflector comprising a plurality of reflector modules connected to each other, each of the reflector modules comprising: a reflecting frame formed such that the reflecting frame is narrow and long and a front thereof is concave inwards, thus having a shape of an arc having a predetermined curvature, and fastened to the lower portion of the condensing frame in such a way as to be rotated leftwards and rightwards by a rotary fastening part; and a reflecting plate having a shape of a thin plate, and locked to the front of the reflecting frame via locking means.
[2] The reflector according to claim 1, wherein the reflecting frame comprises: left and right sidewalls; and a plurality of spacers inserted between the sidewalls at predetermined intervals.
[3] The reflector according to claim 1 or 2, wherein the reflecting frame is manufactured or formed using any one of metal, synthetic resin, and foaming concrete.
[4] The reflector according to claim 1, wherein the rotary fastening part is fastened at an upper end thereof to a lower portion of the reflecting frame, and is fastened at a lower end thereof to the condensing frame via a fastening bolt.
PCT/KR2008/003979 2007-07-09 2008-07-07 Reflector module of solar concentrator WO2009008644A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0069394 2007-07-09
KR20070069394 2007-07-09

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110971180A (en) * 2019-12-20 2020-04-07 吕晨康 Solar device capable of absorbing solar energy on two sides
WO2022245197A1 (en) * 2021-05-21 2022-11-24 Joske´S De Mexico S.A. De C.V. Solar energy collector

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US4423719A (en) * 1980-04-03 1984-01-03 Solar Kinetics, Inc. Parabolic trough solar collector
JP2003279165A (en) * 2002-03-25 2003-10-02 Mikio Kinoshita Solar radiation concentrating device
KR200375355Y1 (en) * 2004-10-19 2005-03-11 이병철 Continuous Integral Reflector

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US4423719A (en) * 1980-04-03 1984-01-03 Solar Kinetics, Inc. Parabolic trough solar collector
JP2003279165A (en) * 2002-03-25 2003-10-02 Mikio Kinoshita Solar radiation concentrating device
KR200375355Y1 (en) * 2004-10-19 2005-03-11 이병철 Continuous Integral Reflector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110971180A (en) * 2019-12-20 2020-04-07 吕晨康 Solar device capable of absorbing solar energy on two sides
WO2022245197A1 (en) * 2021-05-21 2022-11-24 Joske´S De Mexico S.A. De C.V. Solar energy collector

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