WO2022162845A1 - Reflection unit for solar cell modules - Google Patents

Reflection unit for solar cell modules Download PDF

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Publication number
WO2022162845A1
WO2022162845A1 PCT/JP2021/003112 JP2021003112W WO2022162845A1 WO 2022162845 A1 WO2022162845 A1 WO 2022162845A1 JP 2021003112 W JP2021003112 W JP 2021003112W WO 2022162845 A1 WO2022162845 A1 WO 2022162845A1
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WO
WIPO (PCT)
Prior art keywords
reflecting
solar cell
reflecting surface
cell module
triangular
Prior art date
Application number
PCT/JP2021/003112
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French (fr)
Japanese (ja)
Inventor
悠 岩田
昌宏 溝口
勝弘 石井
Original Assignee
ネクストエナジー・アンド・リソース株式会社
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Application filed by ネクストエナジー・アンド・リソース株式会社 filed Critical ネクストエナジー・アンド・リソース株式会社
Priority to JP2022577925A priority Critical patent/JPWO2022162845A1/ja
Priority to PCT/JP2021/003112 priority patent/WO2022162845A1/en
Publication of WO2022162845A1 publication Critical patent/WO2022162845A1/en

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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
    • 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 reflective unit for a solar cell module.
  • the amount of power generated by the solar cell module increases as the altitude of the sun rises, and reaches its peak around noon when the solar radiation intensity is at its maximum.
  • FIG. 10 is a reference diagram superimposing the amount of power generated by a general solar cell module and the amount of power generated by a solar cell module designed to overload the output.
  • the horizontal axis indicates the passage of time from morning to night, and the vertical axis indicates the amount of power generation.
  • the power generation amount of a general solar cell module is indicated as "normal power generation amount”
  • the power generation amount of a solar cell module designed to be overloaded is indicated as "power generation amount when overloaded”. ing.
  • DC electricity generated by the solar cell module is generated in excess of the amount that can be converted into AC electricity at one time by the power conditioner. A so-called peak cut, in which the amount is discarded, is performed.
  • Patent Literature 1 discloses a technique of arranging a film-like reflective module between rows of solar cell modules.
  • sunlight is reflected by a reflecting surface of a film-like reflecting module and irradiated to an adjacent solar cell module, thereby increasing the output of the entire solar cell module.
  • the solar cell module may be damaged due to excessive solar radiation intensity on the solar cell module.
  • the present invention provides a solar cell module reflective unit that is arranged to be inclined in one direction, comprising a reflective member, wherein the reflective member is arranged in the direction in which the reflective unit should be inclined.
  • a reflecting unit comprising at least one valley-shaped pattern extending in a direction orthogonal to the Invention 1).
  • Such an invention is arranged, for example, on the south side of a solar cell module whose light-receiving surface is slanted to the south, and is slanted to the north.
  • the solar radiation intensity can be increased in the morning and afternoon hours when the solar radiation intensity is relatively weak. Therefore, since the solar radiation intensity around noon when the solar radiation intensity reaches its maximum does not increase excessively, it is possible to increase the overall power generation amount while suppressing the increase in the peak-cut power generation amount.
  • invention 1 when the direction toward the sky from each of the first reflecting surface and the second reflecting surface is the positive direction, the normal vector of the first reflecting surface and the normal of the second reflecting surface
  • the angle ⁇ formed with the vector is preferably 30° or more and 90° or less (Invention 2).
  • the at least one valley pattern is defined by two triangular prismatic structures connected in the orthogonal direction, and the first reflecting surface and the second reflecting surface are , preferably a pair of surfaces formed by the two triangular prism-shaped structures facing each other across the connection line of the two triangular prism-shaped structures (Invention 3).
  • the reflecting member can be easily manufactured, and the effect of increasing the solar radiation intensity in the solar cell module can be enhanced.
  • the first reflective surface and the second reflective surface are a pair of triangular prismatic structures that face each other across a connecting line of the two triangular prismatic structures. It is preferably a part of the surface (Invention 4).
  • the reflecting member can be easily manufactured, and the effect of increasing the solar radiation intensity in the solar cell module can be enhanced.
  • each of the two triangular prismatic structures includes a triangular pyramidal region whose cross-sectional area decreases along the direction in which the reflecting unit is to be tilted, and the first reflecting surface and the It is preferable that the second reflecting surface is a pair of surfaces formed by the two triangular pyramidal regions facing each other with the connection line interposed therebetween (invention 5).
  • the reflecting member can be easily manufactured, and the effect of increasing the solar radiation intensity in the solar cell module can be further enhanced.
  • the solar cell module reflection unit of the present invention is arranged, for example, on the south side of the solar cell module whose light receiving surface is obliquely arranged toward the south, and is inclined toward the north. According to the reflecting unit, the solar radiation intensity can be increased in the morning and afternoon hours when the solar radiation intensity is relatively low. Therefore, since the solar radiation intensity around noon when the solar radiation intensity reaches its maximum does not increase excessively, it is possible to increase the overall power generation amount while suppressing the increase in the peak-cut power generation amount.
  • FIGS. 1A and 1B are schematic diagrams showing a solar cell module reflection unit according to a first embodiment of the present invention, in which (a) is a perspective view, (b) is a top view, and (c) is A of (b). -A line cross-sectional view, (d) is a reference perspective view shown together with the solar cell module.
  • 2A and 2B are schematic diagrams showing a solar cell module reflection unit according to a second embodiment of the present invention, in which (a) is a perspective view, (b) is a top view, and (c) is A1 of (b).
  • FIG. 3 is a schematic diagram showing a conventional reflector for a solar cell module together with a solar cell module, in which (a) is a reflector having a planar reflecting surface, and (b) is a cross section in a direction perpendicular to the direction of inclination. shows a reflector with a concave reflecting surface.
  • FIG. 4(a) is a schematic cross-sectional view showing how the reflectors of Comparative Examples 2 and 3 are installed on the solar cell module.
  • FIG. 4B is a schematic cross-sectional view of the reflector of Comparative Example 2 as seen from the east side.
  • FIG. 5(a) is a schematic cross-sectional view showing how to install each reflection unit of Examples 1 and 2 on a solar cell module.
  • 5B is a top view of the reflecting member of Example 1.
  • FIG. 5C is a top view of the reflecting member of Example 2.
  • FIG. 6 is a schematic diagram of an array of solar cell modules of 9 m in the east-west direction and 4 m in the north-south direction divided into 9 ⁇ 12 squares.
  • FIG. 7 is a graph showing changes in the solar radiation intensity in the light receivers installed in the black-painted portions in FIG. 6 for Comparative Examples 1 to 3 and Examples 1 and 2;
  • FIG. 8 is a graph showing the rate of increase in solar radiation intensity in the light receivers installed in the blackened portions of FIG. 6 for Comparative Examples 1 to 3 and Examples 1 and 2;
  • FIG. 9 is a graph showing the solar radiation intensity distribution in an array of solar cell modules, in which (a) is for Comparative Example 2, (b) is for Example 1, and (c) is for Example 2. showing.
  • FIG. 10 is a reference diagram superimposing the amount of power generated by a general solar cell module and the amount of power generated by a solar cell module designed to overload the output.
  • a solar cell module 100 as shown in FIGS. 1(d) and 2(e) will be briefly described as an example of a solar cell module to which the reflecting unit for a solar cell module of the present invention can be applied.
  • the solar cell module 100 is obliquely installed so that the light receiving surface faces south.
  • a plurality of solar cell modules 100 are arranged at regular intervals in the north-south direction.
  • FIGS. 1A and 1B are schematic diagrams showing a solar cell module reflection unit 10 according to a first embodiment of the present invention, in which (a) is a perspective view, (b) is a top view, and (c) is a perspective view of (b). A cross-sectional view taken along the line AA, and (d) is a reference perspective view shown together with a solar cell module. As shown in FIG. 1(d), the reflecting unit 10 is arranged with an inclination in one direction during use.
  • a reflecting unit 10 includes a reflecting member 1 .
  • the reflecting member 1 includes at least one valley-shaped pattern 2 extending in a direction ⁇ 1 perpendicular to the direction ⁇ 1 in which the reflecting unit 10 is to be tilted.
  • the valley pattern 2 has a pair of reflecting surfaces 3 composed of a first reflecting surface 31 and a second reflecting surface 32 .
  • FIG. 3A and 3B are schematic diagrams showing a conventional reflector for a solar cell module together with a solar cell module 100, in which (a) is a reflector 30 having a planar reflecting surface, and (b) is a direction orthogonal to the direction of inclination. A reflector 40 having a reflective surface with a concave cross-section is shown.
  • the output of the solar cell module can be increased.
  • the solar cell module may be damaged due to excessive solar radiation intensity on the solar cell module.
  • the reflecting member 1 has at least one valley pattern 2 extending in the direction ⁇ 1 perpendicular to the direction ⁇ 1 in which the reflecting unit 10 should be tilted.
  • the valley pattern 2 has a pair of reflecting surfaces 3 composed of a first reflecting surface 31 and a second reflecting surface 32, the solar radiation intensity is relatively low in the morning and afternoon hours. can be increased. Therefore, since the solar radiation intensity around noon when the solar radiation intensity reaches its maximum does not increase excessively, it is possible to increase the overall power generation amount while suppressing the increase in the peak-cut power generation amount.
  • the reflecting unit 10 has one valley pattern 2 extending in the direction ⁇ 1.
  • the reflecting unit 10 has three valley patterns 2 extending in the direction ⁇ 1.
  • the number of valley patterns 2 may be two, or may be four or more.
  • the valley pattern 2 is defined by two triangular prismatic structures 4 connected in the direction ⁇ 1.
  • the first reflecting surface 31 and the second reflecting surface 32 are a pair of surfaces formed by two triangular prismatic structures 4 facing each other with the connection line C1 of the two triangular prismatic structures 4 interposed therebetween.
  • the cross-sectional area of the triangular prismatic structure 4 is constant along the direction ⁇ 1.
  • the cross-sectional area of the triangular prismatic structure 4 means the cross-sectional area of the triangular prismatic structure 4 in the direction ⁇ 1.
  • the triangular columnar structure 4 is a structure defined by three side surfaces of a first inclined surface 41 , a second inclined surface 42 and a bottom surface 43 . As shown in FIG. 1, the triangular prismatic structure 4 does not have to physically have the bottom surface 43 .
  • the triangular columnar structure 4 in FIG. 1 has a gable roof shape with a first inclined surface 41 and a second inclined surface 42 .
  • the cross-sectional area of the triangular prismatic structure 4 is defined by the first inclined surface 41, the second inclined surface 42, and the bottom surface 43 as a virtual surface. It means the cross-sectional area of the configured triangular prismatic structure 4 .
  • the second inclined surface 42 of the triangular prismatic structure 4 corresponds to the first reflecting surface 31
  • the first inclined surface 41 of the triangular prismatic structure 4 corresponds to the second reflecting surface 32 . That is, in the present embodiment, a pair of surfaces formed by the second inclined surface 42 of one triangular prismatic structure 4 and the first inclined surface 41 of the adjacent triangular prismatic structure 4 serves as the first reflecting surface. It corresponds to a pair of reflecting surfaces 3 composed of the surface 31 and the second reflecting surface 32 .
  • the reflection The member 1 can be easily manufactured, and the effect of increasing the solar radiation intensity in the solar cell module 100 can be enhanced.
  • the cross-sectional shape of the triangular columnar structure 4 may be an isosceles triangle having an apex angle defined by the first inclined surface 41 and the second inclined surface 42 . That is, in the triangular columnar structure 4, the first inclined surface 41 and the second inclined surface 42 may have a symmetrical structure centering on the top side extending in the direction ⁇ 1. This means that in the valley pattern 2, the first reflecting surface 31 and the second reflecting surface 32 have a symmetrical structure with the connecting line C1 as the center. Since the first reflecting surface 31 and the second reflecting surface 32 have a symmetrical structure with respect to the connection line C1, the uniformity of the effect of increasing the solar radiation intensity in the solar cell module 100 can be ensured. .
  • a plurality of continuous valley-shaped patterns 2 are formed by arranging a plurality of gable roof-shaped triangular prism-shaped structures 4 in a row along the direction ⁇ 1.
  • a pair of surfaces formed by the two triangular prismatic structures 4 are used as a pair of reflecting surfaces 3 .
  • the normal vector N31 of the first reflecting surface 31 and the normal vector N32 of the second reflecting surface 32 are The angle ⁇ 1 to be formed is 30° or more and 90° or less.
  • the angle ⁇ 1 between the normal vector N 31 and the normal vector N 32 is too large, the intensity of solar radiation in the solar cell module 100 tends to be uneven. In photovoltaic power generation, generated power is affected by the lowest current value generated in each cell in each series circuit of solar cell module 100 . Therefore, if there is unevenness in the solar radiation intensity, the amount of power generated in a portion with strong solar radiation does not contribute to the AC power generation. On the other hand, if the angle ⁇ 1 is too small, the solar cell module 100 is less effective in increasing the solar radiation intensity. When the angle ⁇ 1 is 30° or more and 90° or less, it is possible to enhance the effect of increasing the solar radiation intensity in the solar cell module 100 while securing the power generation amount that contributes to the AC power generation. Preferably, the angle ⁇ 1 is 40° or more and 60° or less.
  • the reflecting unit 10 is obliquely installed in the direction ⁇ 1 at an inclination angle ⁇ 1 and used.
  • the inclination angle ⁇ 1 is the angle formed by the bottom surface 43 of the triangular columnar structure 4 or the bottom surface 43 as a virtual surface with respect to the horizontal plane.
  • the reflecting unit 10 is normally provided with the reflecting member 1 obliquely oriented northward at an inclination angle of ⁇ 1 on the south side of the solar cell module 100 whose light-receiving surface is obliquely oriented southward. used.
  • the inclination angle ⁇ 1 can be appropriately set according to the installation angle of the symmetrical solar cell module 100, and may be, for example, 15° or more and 45° or less.
  • the same material as used for a conventional reflecting plate or reflecting sheet can be used.
  • the material for forming the reflecting surface 3 includes a sheet of polyester, polyethylene, or the like vapor-deposited with aluminum, a canvas vapor-deposited with aluminum, or an aluminum plate.
  • FIGSecond embodiment> 2A and 2B are schematic diagrams showing a solar cell module reflection unit 20 according to a second embodiment of the present invention, in which (a) is a perspective view, (b) is a top view, and (c) is a perspective view of (b). 3D is a cross-sectional view taken along the line A1-A1, (d) is a cross-sectional view taken along the line A2-A2 of (b), and (e) is a reference perspective view showing the solar cell module 100 together. Similar to the reflection unit 10 of the first embodiment, the reflection unit 20 is arranged to be inclined in one direction during use, as shown in FIG. 2(d).
  • the reflecting unit 20 has a reflecting member 6 .
  • the reflecting member 6 includes at least one valley-shaped pattern 7 extending in a direction ⁇ 2 orthogonal to the direction ⁇ 2 in which the reflecting unit 20 is to be tilted.
  • the valley pattern 7 has a pair of reflecting surfaces 8 composed of a first reflecting surface 81 and a second reflecting surface 82 .
  • the reflecting member 6 includes at least one valley pattern 7 extending in the direction ⁇ 2 perpendicular to the direction ⁇ 2 in which the reflecting unit 20 should be tilted.
  • the valley-shaped pattern 7 has a pair of reflecting surfaces 8 composed of a first reflecting surface 81 and a second reflecting surface 82, thereby increasing the solar radiation intensity in the morning and afternoon hours when the solar radiation intensity is relatively low. can be made Therefore, since the solar radiation intensity around noon when the solar radiation intensity reaches its maximum does not increase excessively, it is possible to increase the overall power generation amount while suppressing the increase in the peak-cut power generation amount.
  • the reflecting unit 20 has one valley pattern 7 extending in the direction ⁇ 2.
  • the reflecting unit 20 has three valley patterns 7 extending in the direction ⁇ 2.
  • the number of valley patterns 7 may be two, or may be four or more.
  • the valley pattern 7 is defined by two triangular prismatic structures 9 connected in the direction ⁇ 2.
  • the triangular columnar structure 9 is a structure defined by three side surfaces, a first inclined surface 91 , a second inclined surface 92 and a bottom surface 93 . As shown in FIG. 2, the triangular prismatic structure 9 does not have to physically have a bottom surface 93 .
  • the triangular columnar structure 9 in FIG. 2 has a gable roof shape with a first inclined surface 91 and a second inclined surface 92 .
  • the first reflecting surface 81 and the second reflecting surface 82 are a pair of surfaces formed by two triangular prismatic structures 9 facing each other across the connection line C2 of the two triangular prismatic structures 9. It is part. More specifically, each of the two triangular prismatic structures 9 includes a triangular pyramidal region 95 whose cross-sectional area decreases along the direction ⁇ 2, and the first reflecting surface 81 and the second reflecting surface 82 are , a pair of surfaces formed by two triangular pyramidal regions 95 facing each other with the connection line C2 interposed therebetween.
  • the triangular pyramidal region 95 has the shape of an upper portion obtained by cutting the triangular prismatic structure 4 in FIG.
  • the cross-sectional area of the triangular pyramidal region 95 means the cross - sectional area of the triangular pyramidal region 95 in the direction ⁇ 2.
  • the portion of the second inclined surface 92 of the triangular prismatic structure 9 that overlaps the triangular pyramidal region 95 corresponds to the first reflecting surface 81
  • the first inclined surface 91 of the triangular prismatic structure 9 A portion overlapping the triangular pyramidal region 95 corresponds to the second reflecting surface 82 . That is, in the present embodiment, of the pair of surfaces formed by the second inclined surface 92 of one triangular prismatic structure 9 and the first inclined surface 91 of the adjacent triangular prismatic structure 9, the triangular pyramidal region A portion overlapping with 95 corresponds to a pair of reflecting surfaces 8 composed of the first reflecting surface 81 and the second reflecting surface 82 .
  • the first reflecting surface 81 and the second reflecting surface 82 are part of a pair of surfaces formed by the two triangular prism-shaped structures 9 facing each other across the connection line C2 of the two triangular prism-shaped structures 9. Therefore, the reflecting member 6 can be easily manufactured, and the effect of increasing the solar radiation intensity in the solar cell module 100 can be enhanced.
  • the cross-sectional shape of the triangular columnar structure 9 may be an isosceles triangle having an apex angle defined by the first inclined surface 91 and the second inclined surface 92 . That is, in the triangular columnar structure 9, the first inclined surface 91 and the second inclined surface 92 may have a symmetrical structure centering on the top side extending in the direction ⁇ 2. This means that in the valley pattern 7, the first reflecting surface 81 and the second reflecting surface 82 have a symmetrical structure with the connecting line C2 as the center. Since the first reflecting surface 81 and the second reflecting surface 82 have a symmetrical structure with respect to the connection line C2 , the uniformity of the effect of increasing the solar radiation intensity in the solar cell module 100 can be ensured. .
  • the reflecting member 6 may or may not physically have a portion other than the triangular pyramidal region 95 in the triangular prismatic structure 9 .
  • the reflecting member 6 in FIG. 2 is an example showing a case where the triangular prismatic structure 9 does not physically have a portion other than the triangular pyramidal region 95 .
  • a plurality of continuous valley-shaped patterns 7 are formed by arranging a plurality of gabled roof-shaped triangular prism-shaped structures 9 in a row along the direction ⁇ 2.
  • a pair of reflecting surfaces 8 are a part of the pair of surfaces formed by the two triangular columnar structures 9 .
  • the normal vector N 81 of the first reflecting surface 81 and the normal vector N 82 of the second reflecting surface 82 are The angle ⁇ 2 to be formed is 30° or more and 90° or less.
  • the reflection unit 20 is obliquely installed in a direction ⁇ 2 at an inclination angle ⁇ 2 and used.
  • the inclination angle ⁇ 2 is the angle formed by the bottom surface 93 of the triangular columnar structure 9 or the bottom surface 93 as a virtual surface with respect to the horizontal plane.
  • the reflecting unit 20 is normally provided with the reflecting member 6 obliquely oriented northward at an inclination angle of ⁇ 2 on the south side of the solar cell module 100 whose light-receiving surface is obliquely oriented southward. used.
  • the range of the tilt angle ⁇ 2 can be appropriately set according to the installation angle of the symmetrical solar cell module 100 , like the tilt angle ⁇ 1 of the reflection unit 10 of the first embodiment. It may be 45° or less.
  • the same material as used for a conventional reflecting plate or reflecting sheet can be used, like the reflecting surface 3 of the reflecting member 1 of the first embodiment.
  • a sheet such as polyester or polyethylene vapor-deposited with aluminum, a canvas vapor-deposited with aluminum, an aluminum plate, or the like can be used.
  • the present invention has been described with reference to the drawings, the present invention is not limited to the above embodiments, and various modifications are possible.
  • the reflecting surface is particularly described. or legs for installation.
  • three-dimensional CAD was used to create the light-receiving surface of the solar cell module, the conventional reflector, and the reflection unit of the present invention. It is assumed that the conventional reflector and the reflecting unit of the present invention have a perfect specular reflection characteristic with a reflectance of 100%.
  • a line (ray) with energy was generated from a light source simulating the sun using the Monte Carlo method, and a light source tracing analysis was performed from the light source to the light receiving surface.
  • the direct light component is emitted as parallel rays from the light source that moves on the sun orbit, and the scattered light component is determined from the hemispherical surface covering the calculation area using the Monte Carlo method to determine the emission position and direction. I thought I would inject.
  • Comparative Example 1 did not use a reflector.
  • Comparative Example 2 As Comparative Example 2, a reflecting plate 30 having a planar reflecting surface as shown in FIG. 3(a) was used. The inclination angle ⁇ 30 of the reflector 30 was set to 40°.
  • Comparative Example 3 As Comparative Example 3, a reflecting plate 40 having a reflecting surface having a concave cross section in a direction orthogonal to the tilt direction shown in FIG. 3B was used. The inclination angle ⁇ 40 of the reflector 40 was set to 45°.
  • Example 1 As Example 1, a reflection unit 20 as shown in FIG. 2(a) was used. The inclination angle ⁇ 2 of the reflecting member 6 was set to 30°. The angle ⁇ 2 shown in FIGS. 2(c) and 2 (d) was set to 80.3°.
  • Example 2 As Example 2, a reflection unit 20 as shown in FIG. 2(a) was used. The inclination angle ⁇ 2 of the reflecting member 6 was set to 30° as in the second embodiment. The angle ⁇ 2 shown in FIGS. 2(c) and 2 (d) was set to 45.8°.
  • FIG. 4A is a schematic cross-sectional view showing how the reflectors 30 and 40 of Comparative Examples 2 and 3 are installed on the solar cell modules 100 (100a and 100b).
  • FIG. 4(a) is a schematic cross-sectional view of the reflectors 30 and 40 as seen from a direction orthogonal to the tilt direction.
  • the concave reflector 40 is also shown planar for convenience in order to clearly show the inclination angles ⁇ 30 and ⁇ 40 of the reflectors 30 and 40 of Comparative Examples 2 and 3.
  • the solar cell module 100 was installed so that the light-receiving surface tilted 20° toward the south.
  • the maximum height of the solar cell module 100 was approximately 1.37 m.
  • the distance (the distance between the maximum heights) between the first solar cell module 100a and the second solar cell module 100b adjacent to the south side thereof was approximately 6.80 m.
  • the reflectors 30 and 40 of Comparative Examples 2 and 3 are inclined northward at an angle of inclination ⁇ 30 between the first solar cell module 100a and the second solar cell module 100b. It was arranged obliquely with an angle ⁇ 40 .
  • the inclination angle ⁇ 30 of the reflector 30 was set to 40°
  • the inclination angle ⁇ 40 of the reflector 40 was set to 45°.
  • FIG. 4B is a schematic cross-sectional view of the reflector 40 of Comparative Example 3 as seen from the east side.
  • the tilt angle ⁇ 40 of the reflector 40 is defined as shown in FIG. 4(b).
  • the reflector 40 of Comparative Example 3 had a concave reflecting surface shown in FIG. 4(b).
  • FIG. 5(a) is a schematic cross-sectional view showing how to install each reflection unit 20 of Examples 1 and 2 on the solar cell module 100 (100a, 100b).
  • FIG. 5A is a schematic cross-sectional view of each reflection unit 20 viewed from a direction orthogonal to the tilt direction.
  • the reflecting member 6 is shown in a planar shape for the sake of convenience in order to clearly show the inclination angle ⁇ 2 of each reflecting member 6 of Examples 1 and 2.
  • the solar cell module 100 was installed such that the light receiving surface tilted southward at 20°.
  • the maximum height of the solar cell module 100 was approximately 1.37 m.
  • the distance (the distance between the maximum heights) between the first solar cell module 100a and the second solar cell module 100b adjacent to the south side thereof was approximately 6.80 m.
  • the reflecting member 6 is tilted northward at an angle of ⁇ between the first solar cell module 100a and the second solar cell module 100b. It was arranged so as to be obliquely installed with 2 .
  • the inclination angle ⁇ 2 of each reflecting member 6 in Examples 1 and 2 was set to 30°.
  • FIG. 5B is a top view of the reflecting member 6 of Example 1.
  • the reflecting member 6 of Example 1 has one valley pattern 7 defined by the two triangular pyramidal structures 9 shown in FIG. 2 arranged at intervals of 2 m. and the angle ⁇ 2 was 80.3°.
  • the cross-sectional shape of the triangular pyramidal structure 9 of Example 1 was an isosceles triangle.
  • FIG. 5C is a top view of the reflecting member 6 of Example 2.
  • the reflecting member 6 of Example 2 has three valley patterns 7 defined by the four triangular pyramidal structures 9 shown in FIG. 2 arranged at intervals of 1 m. and the angle ⁇ 2 was 45.8°.
  • the cross-sectional shape of the triangular pyramidal structure 9 of Example 2 was an isosceles triangle.
  • FIG. 6 is a schematic diagram of an array of solar cell modules 100 of 9 m in the east-west direction and 4 m in the north-south direction divided into 9 ⁇ 12 squares.
  • the horizontal axis indicates the distance from the east edge of the array, and the vertical axis indicates the distance from the bottom edge of the array.
  • a comparison test of changes in the sunshine intensity was conducted for Comparative Examples 1 to 3 and Examples 1 and 2 with respect to the black-painted portion in FIG. The results are shown in FIGS. 7 and 8.
  • FIG. 7 and 8 The results are shown in FIGS. 7 and 8.
  • FIG. 7 is a graph showing changes in solar radiation intensity in the light receivers installed in the blackened portions of FIG. 6 for Comparative Examples 1 to 3 and Examples 1 and 2.
  • the horizontal axis indicates time, and the vertical axis indicates sunshine intensity.
  • FIG. 8 is a graph showing the rate of increase in solar radiation intensity in the light receivers installed in the blackened portions of FIG. 6 for Comparative Examples 1 to 3 and Examples 1 and 2;
  • the horizontal axis indicates time, and the vertical axis indicates the increase rate of sunlight intensity.
  • the solar cell module may be damaged due to excessive solar radiation intensity on the solar cell module. Therefore, it is more desirable to increase the solar radiation intensity during low solar radiation in the morning and afternoon than to increase the maximum solar radiation intensity.
  • the planar reflector of Comparative Example 2 the generated power increases most in all time zones, but the maximum solar radiation intensity also increases by about 150%, which is a major disadvantage.
  • the maximum solar radiation intensity did not increase so much, but the overall solar radiation intensity increased.
  • FIG. 9 is a graph showing the solar radiation intensity distribution in an array of solar cell modules, in which (a) is for Comparative Example 2, (b) is for Example 1, and (c) is for Example 2. showing.
  • the horizontal axis indicates the distance from the east edge of the array, and the vertical axis indicates the distance from the bottom edge of the array.
  • the solar radiation intensity was uniform up to about 1.5 m from the bottom end of the array, but increased to about 125%. It turned out that I would be taken.
  • FIG. 9B in the reflection unit of Example 1, although the maximum increase rate of the solar radiation intensity was about 120%, the solar radiation intensity was slightly uneven.
  • FIG. 9(c) in the reflection unit of Example 2, the maximum increase rate of the solar radiation intensity was about 110%, and it was found that the solar radiation intensity increased approximately evenly as a whole.
  • the present invention can increase the overall power generation amount while suppressing an increase in peak-cut power generation amount, and can be widely used for various solar cell modules.

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Abstract

The present invention is a reflection unit for solar cell modules which is disposed so as to be inclined in one direction, said reflection unit comprising a reflection member, wherein the reflection member includes at least one valley-type pattern that extends in a direction orthogonal to the direction in which the reflection unit is to be inclined, and the valley-type pattern has a pair of reflection surfaces constituted by a first reflection surface and a second reflection surface. The reflection unit for solar cell modules is disposed, for example, so as to be inclined facing north, on the south side of a solar cell module having a light receiving surface that is provided so as to be inclined facing south. The reflection unit makes it possible to increase the insolation intensity during AM and PM times during which the insolation intensity is relatively low. Thus, the insolation intensity is not excessively increased at around noontime when the insolation intensity is at a maximum, and it is therefore possible to increase the total amount of generated power while suppressing an increase in the amount of generated power subject to peak shaving.

Description

太陽電池モジュール用反射ユニットReflector unit for solar module
　本発明は、太陽電池モジュール用の反射ユニットに関する。 The present invention relates to a reflective unit for a solar cell module.
　太陽電池モジュールの発電量は、太陽高度の上昇とともに増加し、日射強度が最大になる正午頃に発電量も最大となる。 The amount of power generated by the solar cell module increases as the altitude of the sun rises, and reaches its peak around noon when the solar radiation intensity is at its maximum.
　最近の太陽光発電所においては、パワーコンディショナの出力に対して、太陽電池モジュールの出力が過積載となるように設計されている場合が多い。図１０は、一般的な太陽電池モジュールの発電量と、出力が過積載となるように設計された太陽電池モジュールの発電量とを重ねて示した参考図である。横軸は朝から夜までの時間経過を、縦軸は発電量を示している。図１０では、一般的な太陽電池モジュールの発電量を「通常の発電量」として、出力が過積載となるように設計された太陽電池モジュールの発電量を「過積載時の発電量」として示している。図１０に示すように、出力が過積載となるように設計された太陽電池モジュールでは、太陽電池モジュールで発電した直流電気をパワーコンディショナで一度に交流電気に変換できる量を超えた分の発電量を捨てる、いわゆるピークカットが行われている。 　In many cases, recent solar power plants are designed so that the output of the solar cell module is overloaded with respect to the output of the power conditioner. FIG. 10 is a reference diagram superimposing the amount of power generated by a general solar cell module and the amount of power generated by a solar cell module designed to overload the output. The horizontal axis indicates the passage of time from morning to night, and the vertical axis indicates the amount of power generation. In FIG. 10, the power generation amount of a general solar cell module is indicated as "normal power generation amount", and the power generation amount of a solar cell module designed to be overloaded is indicated as "power generation amount when overloaded". ing. As shown in FIG. 10, in a solar cell module designed to have an overloaded output, DC electricity generated by the solar cell module is generated in excess of the amount that can be converted into AC electricity at one time by the power conditioner. A so-called peak cut, in which the amount is discarded, is performed.
　近年、太陽光発電分野では、太陽電池モジュールに照射される光の量を増加させるために、太陽電池モジュールの間に反射板又は反射シートを設けることで、太陽光を太陽電池モジュールに反射させる技術が種々提案されている。例えば、特許文献１には、太陽電池モジュールの列の間にフィルム状の反射モジュールを配置する技術が開示されている。特許文献１では、太陽光をフィルム状の反射モジュールの反射面で反射させて、隣接する太陽電池モジュールへ照射することにより、太陽電池モジュール全体の出力の増加を図っている。 In recent years, in the field of photovoltaic power generation, in order to increase the amount of light irradiated to a solar cell module, a technique for reflecting sunlight to the solar cell module by providing a reflector or a reflective sheet between the solar cell modules. have been proposed. For example, Patent Literature 1 discloses a technique of arranging a film-like reflective module between rows of solar cell modules. In Patent Literature 1, sunlight is reflected by a reflecting surface of a film-like reflecting module and irradiated to an adjacent solar cell module, thereby increasing the output of the entire solar cell module.
　しかし、従来の反射板又は反射シートによって太陽電池モジュールの出力を増加させても、ピークカットされる発電量が増えるだけで、パワーコンディショナの出力の増加には大きく寄与できないおそれがある。また、従来の反射板又は反射シートを用いると、太陽電池モジュールに対する日射強度が強すぎることで、太陽電池モジュールへダメージが生じるおそれもある。 However, even if the output of the solar cell module is increased by using a conventional reflector or sheet, it will only increase the amount of power generated that is peak-cut, and there is a risk that it will not contribute significantly to the increase in the output of the power conditioner. Moreover, if a conventional reflector or sheet is used, the solar cell module may be damaged due to excessive solar radiation intensity on the solar cell module.
国際公開第２０１７／１５７４２４号WO2017/157424
　本発明は上述のような事情に基づいてなされたものであり、ピークカットされる発電量の増加を抑えつつ、全体の発電量を増加させることが可能な太陽電池モジュール用反射ユニットの提供を目的とする。 SUMMARY OF THE INVENTION It is an object of the present invention to provide a reflection unit for a solar cell module that can increase the overall power generation while suppressing an increase in the amount of power generated by peak cutting. and
　上記課題を解決するために、本発明は、一方向に傾斜して配置される太陽電池モジュール用反射ユニットであって、反射部材を備え、前記反射部材は、前記反射ユニットが傾斜されるべき方向と直交する方向に延在する谷型パターンを少なくとも１つ含み、前記谷型パターンは、第１反射面と第２反射面とから構成される一対の反射面を有する、反射ユニットを提供する（発明１）。 In order to solve the above problems, the present invention provides a solar cell module reflective unit that is arranged to be inclined in one direction, comprising a reflective member, wherein the reflective member is arranged in the direction in which the reflective unit should be inclined. providing a reflecting unit comprising at least one valley-shaped pattern extending in a direction orthogonal to the Invention 1).
　かかる発明（発明１）は、例えば、受光面が南向きに斜設される太陽電池モジュールの南側に、北向きに傾斜して配置される。当該発明によれば、日射強度が比較的弱い午前及び午後の時間帯の日射強度を増加させることができる。そのため、日射強度が最大になる正午頃の日射強度を過剰に増加させることないので、ピークカットされる発電量の増加を抑えつつ、全体の発電量を増加させることができる。 Such an invention (Invention 1) is arranged, for example, on the south side of a solar cell module whose light-receiving surface is slanted to the south, and is slanted to the north. According to the invention, the solar radiation intensity can be increased in the morning and afternoon hours when the solar radiation intensity is relatively weak. Therefore, since the solar radiation intensity around noon when the solar radiation intensity reaches its maximum does not increase excessively, it is possible to increase the overall power generation amount while suppressing the increase in the peak-cut power generation amount.
　上記発明（発明１）においては、前記第１反射面及び第２反射面それぞれから空に向かう方向を正方向とするとき、前記第１反射面の法線ベクトルと前記第２反射面の法線ベクトルとのなす角度θが、３０°以上９０°以下であることが好ましい（発明２）。 In the above invention (invention 1), when the direction toward the sky from each of the first reflecting surface and the second reflecting surface is the positive direction, the normal vector of the first reflecting surface and the normal of the second reflecting surface The angle θ formed with the vector is preferably 30° or more and 90° or less (Invention 2).
　第１反射面の法線ベクトルと第２反射面の法線ベクトルとのなす角度θが大き過ぎると、太陽電池モジュールにおける日射強度にムラが生じやすい。太陽光発電において、発電電力は、太陽電池モジュールの各直列回路中の各セルで発生する電流値のうち最も低い値に影響を受ける。そのため、日射強度にムラがある場合、日射が強い部分での発電量は交流発電電力に寄与しない。一方、角度θが小さ過ぎると、太陽電池モジュールにおける日射強度の増加効果が小さくなる。かかる発明（発明２）によれば、交流発電電力に寄与する発電量を確保しつつ、太陽電池モジュールにおける日射強度の増加効果を高めることができる。 If the angle θ formed by the normal vector of the first reflecting surface and the normal vector of the second reflecting surface is too large, unevenness in the solar radiation intensity tends to occur in the solar cell module. In photovoltaic power generation, generated power is affected by the lowest current value generated in each cell in each series circuit of the photovoltaic module. Therefore, if there is unevenness in the solar radiation intensity, the amount of power generated in a portion with strong solar radiation does not contribute to the AC power generation. On the other hand, if the angle θ is too small, the effect of increasing the solar radiation intensity in the solar cell module becomes small. According to this invention (Invention 2), it is possible to enhance the effect of increasing the solar radiation intensity in the solar cell module while ensuring the amount of power that contributes to the AC power generation.
　上記発明（発明１，２）においては、前記少なくとも１つの谷型パターンは、前記直交する方向に接続される２つの三角柱状構造体により画定され、前記第１反射面及び前記第２反射面は、前記２つの三角柱状構造体の接続線を挟んで対向する前記２つの三角柱状構造体により形成される一対の面であることが好ましい（発明３）。 In the above inventions (inventions 1 and 2), the at least one valley pattern is defined by two triangular prismatic structures connected in the orthogonal direction, and the first reflecting surface and the second reflecting surface are , preferably a pair of surfaces formed by the two triangular prism-shaped structures facing each other across the connection line of the two triangular prism-shaped structures (Invention 3).
　かかる発明（発明３）によれば、反射部材の製造が容易であるとともに、太陽電池モジュールにおける日射強度の増加効果を高めることができる。 According to this invention (Invention 3), the reflecting member can be easily manufactured, and the effect of increasing the solar radiation intensity in the solar cell module can be enhanced.
　上記発明（発明３）においては、記第１反射面及び前記第２反射面は、前記２つの三角柱状構造体の接続線を挟んで対向する前記２つの三角柱状構造体により形成される一対の面の一部であることが好ましい（発明４）。 In the above invention (Invention 3), the first reflective surface and the second reflective surface are a pair of triangular prismatic structures that face each other across a connecting line of the two triangular prismatic structures. It is preferably a part of the surface (Invention 4).
　かかる発明（発明４）によれば、反射部材の製造が容易であるとともに、太陽電池モジュールにおける日射強度の増加効果を高めることができる。 According to this invention (Invention 4), the reflecting member can be easily manufactured, and the effect of increasing the solar radiation intensity in the solar cell module can be enhanced.
　上記発明（発明４）においては、前記２つの三角柱状構造体のそれぞれは、前記反射ユニットが傾斜されるべき方向に沿って断面積が減少する三角錐状領域を含み、前記第１反射面及び前記第２反射面は、前記接続線を挟んで対向する前記２つの三角錐状領域により形成される一対の面であることが好ましい（発明５）。 In the above invention (Invention 4), each of the two triangular prismatic structures includes a triangular pyramidal region whose cross-sectional area decreases along the direction in which the reflecting unit is to be tilted, and the first reflecting surface and the It is preferable that the second reflecting surface is a pair of surfaces formed by the two triangular pyramidal regions facing each other with the connection line interposed therebetween (invention 5).
　かかる発明（発明５）によれば、反射部材の製造が容易であるとともに、太陽電池モジュールにおける日射強度の増加効果をより高めることができる。 According to this invention (Invention 5), the reflecting member can be easily manufactured, and the effect of increasing the solar radiation intensity in the solar cell module can be further enhanced.
　本発明の太陽電池モジュール用反射ユニットは、例えば、受光面が南向きに斜設される太陽電池モジュールの南側に、北向きに傾斜して配置される。当該反射ユニットによれば、日射強度が比較的弱い午前及び午後の時間帯の日射強度を増加させることができる。そのため、日射強度が最大になる正午頃の日射強度を過剰に増加させることないので、ピークカットされる発電量の増加を抑えつつ、全体の発電量を増加させることができる。 The solar cell module reflection unit of the present invention is arranged, for example, on the south side of the solar cell module whose light receiving surface is obliquely arranged toward the south, and is inclined toward the north. According to the reflecting unit, the solar radiation intensity can be increased in the morning and afternoon hours when the solar radiation intensity is relatively low. Therefore, since the solar radiation intensity around noon when the solar radiation intensity reaches its maximum does not increase excessively, it is possible to increase the overall power generation amount while suppressing the increase in the peak-cut power generation amount.
図１は、本発明の第一実施形態に係る太陽電池モジュール用反射ユニットを示す概略図であって、（ａ）は斜視図、（ｂ）は上面図、（ｃ）は（ｂ）のＡ－Ａ線断面図、（ｄ）は太陽電池モジュールとともに示す参考斜視図である。1A and 1B are schematic diagrams showing a solar cell module reflection unit according to a first embodiment of the present invention, in which (a) is a perspective view, (b) is a top view, and (c) is A of (b). -A line cross-sectional view, (d) is a reference perspective view shown together with the solar cell module. 図２は、本発明の第二実施形態に係る太陽電池モジュール用反射ユニットを示す概略図であって、（ａ）は斜視図、（ｂ）は上面図、（ｃ）は（ｂ）のＡ１－Ａ１線断面図、（ｄ）は（ｂ）のＡ２－Ａ２線断面図、（ｅ）は太陽電池モジュールとともに示す参考斜視図である。2A and 2B are schematic diagrams showing a solar cell module reflection unit according to a second embodiment of the present invention, in which (a) is a perspective view, (b) is a top view, and (c) is A1 of (b). -A1 line cross-sectional view, (d) is an A2-A2 line cross-sectional view of (b), and (e) is a reference perspective view shown together with a solar cell module. 図３は、従来の太陽電池モジュール用反射板を太陽電池モジュールとともに示す概略図であって、（ａ）は平面状の反射面を有する反射板、（ｂ）は傾斜方向と直交する方向の断面が凹状である反射面を有する反射板を示している。FIG. 3 is a schematic diagram showing a conventional reflector for a solar cell module together with a solar cell module, in which (a) is a reflector having a planar reflecting surface, and (b) is a cross section in a direction perpendicular to the direction of inclination. shows a reflector with a concave reflecting surface. 図４（ａ）は、太陽電池モジュールに対する比較例２、３の反射板の設置の仕方を示す概略断面図である。図４（ｂ）は、比較例２の反射板を東側から見た概略断面図である。FIG. 4(a) is a schematic cross-sectional view showing how the reflectors of Comparative Examples 2 and 3 are installed on the solar cell module. FIG. 4B is a schematic cross-sectional view of the reflector of Comparative Example 2 as seen from the east side. 図５（ａ）は、太陽電池モジュールに対する実施例１、２の各反射ユニットの設置の仕方を示す概略断面図である。図５（ｂ）は、実施例１の反射部材の上面図である。図５（ｃ）は、実施例２の反射部材の上面図である。FIG. 5(a) is a schematic cross-sectional view showing how to install each reflection unit of Examples 1 and 2 on a solar cell module. 5B is a top view of the reflecting member of Example 1. FIG. FIG. 5C is a top view of the reflecting member of Example 2. FIG. 図６は、東西方向９ｍ×南北方向４ｍの太陽電池モジュールのアレイを９×１２マスに分割した概略図である。FIG. 6 is a schematic diagram of an array of solar cell modules of 9 m in the east-west direction and 4 m in the north-south direction divided into 9×12 squares. 図７は、比較例１から３及び実施例１、２について、図６の黒塗り部に設置した受光器における日射強度の変化を示したグラフである。FIG. 7 is a graph showing changes in the solar radiation intensity in the light receivers installed in the black-painted portions in FIG. 6 for Comparative Examples 1 to 3 and Examples 1 and 2; 図８は、比較例１から３及び実施例１、２について、図６の黒塗り部に設置した受光器における日射強度の増加率を示したグラフである。FIG. 8 is a graph showing the rate of increase in solar radiation intensity in the light receivers installed in the blackened portions of FIG. 6 for Comparative Examples 1 to 3 and Examples 1 and 2; 図９は、太陽電池モジュールのアレイにおける日射強度分布を示すグラフであって、（ａ）は比較例２の場合、（ｂ）は実施例１の場合、（ｃ）は実施例２の場合を示している。FIG. 9 is a graph showing the solar radiation intensity distribution in an array of solar cell modules, in which (a) is for Comparative Example 2, (b) is for Example 1, and (c) is for Example 2. showing. 図１０は、一般的な太陽電池モジュールの発電量と、出力が過積載となるように設計された太陽電池モジュールの発電量とを重ねて示した参考図である。FIG. 10 is a reference diagram superimposing the amount of power generated by a general solar cell module and the amount of power generated by a solar cell module designed to overload the output.
　以下、本発明の太陽電池モジュール用反射ユニットの実施の形態について、適宜図面を参照して説明する。以下に説明する実施形態は、本発明の理解を容易にするためのものであって、何ら本発明を限定するものではない。 Hereinafter, embodiments of the solar cell module reflection unit of the present invention will be described with reference to the drawings as appropriate. The embodiments described below are intended to facilitate understanding of the present invention, and are not intended to limit the present invention.
〔太陽電池モジュール〕
　まず、本発明の太陽電池モジュール用反射ユニットを適用可能な太陽電池モジュールとして、図１（ｄ）及び図２（ｅ）に示されるような太陽電池モジュール１００を例に挙げて簡単に説明する。 [Solar module]
First, a solar cell module 100 as shown in FIGS. 1(d) and 2(e) will be briefly described as an example of a solar cell module to which the reflecting unit for a solar cell module of the present invention can be applied.
　太陽電池モジュール１００は、受光面が南向きになるよう斜設されている。通常、複数の太陽電池モジュール１００が、南北方向に等間隔で配列されている。 The solar cell module 100 is obliquely installed so that the light receiving surface faces south. Usually, a plurality of solar cell modules 100 are arranged at regular intervals in the north-south direction.
〔太陽電池モジュール用反射ユニット〕
　次に、本発明の太陽電池モジュール用反射ユニットの実施の形態について、図面を参照しながら詳説する。 [Reflection unit for solar cell module]
BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a solar cell module reflecting unit of the present invention will be described in detail with reference to the drawings.
〈第一実施形態〉
　図１は、本発明の第一実施形態に係る太陽電池モジュール用反射ユニット１０を示す概略図であって、（ａ）は斜視図、（ｂ）は上面図、（ｃ）は（ｂ）のＡ－Ａ線断面図、（ｄ）は太陽電池モジュールとともに示す参考斜視図である。反射ユニット１０は、図１（ｄ）に示すように、使用の際に、一方向に傾斜して配置される。 <First embodiment>
1A and 1B are schematic diagrams showing a solar cell module reflection unit 10 according to a first embodiment of the present invention, in which (a) is a perspective view, (b) is a top view, and (c) is a perspective view of (b). A cross-sectional view taken along the line AA, and (d) is a reference perspective view shown together with a solar cell module. As shown in FIG. 1(d), the reflecting unit 10 is arranged with an inclination in one direction during use.
　反射ユニット１０は反射部材１を備えている。反射部材１は、反射ユニット１０が傾斜されるべき方向α１と直交する方向β１に延在する谷型パターン２を少なくとも１つ含んでいる。谷型パターン２は、第１反射面３１と第２反射面３２とから構成される一対の反射面３を有する。 A reflecting unit 10 includes a reflecting member 1 . The reflecting member 1 includes at least one valley-shaped pattern 2 extending in a direction β1 perpendicular to the direction α1 in which the reflecting unit 10 is to be tilted. The valley pattern 2 has a pair of reflecting surfaces 3 composed of a first reflecting surface 31 and a second reflecting surface 32 .
　図３は、従来の太陽電池モジュール用反射板を太陽電池モジュール１００とともに示す概略図であって、（ａ）は平面状の反射面を有する反射板３０、（ｂ）は傾斜方向と直交する方向の断面が凹状である反射面を有する反射板４０を示している。図３に示されるような従来の反射板によれば、太陽電池モジュールの出力を増加させることができる。しかし、太陽電池モジュールの出力を増加させても、ピークカットされる発電量が増えるだけで、パワーコンディショナの出力の増加には大きく寄与できないおそれがある。また、図３に示されるような従来の反射板によれば、太陽電池モジュールに対する日射強度が強すぎることで、太陽電池モジュールへダメージが生じるおそれもある。 3A and 3B are schematic diagrams showing a conventional reflector for a solar cell module together with a solar cell module 100, in which (a) is a reflector 30 having a planar reflecting surface, and (b) is a direction orthogonal to the direction of inclination. A reflector 40 having a reflective surface with a concave cross-section is shown. According to the conventional reflector as shown in FIG. 3, the output of the solar cell module can be increased. However, even if the output of the solar cell module is increased, there is a possibility that the output of the power conditioner will not be greatly increased because the peak-cut power generation amount will increase. Moreover, according to the conventional reflector as shown in FIG. 3, the solar cell module may be damaged due to excessive solar radiation intensity on the solar cell module.
　一方、本実施形態の太陽電池モジュール用反射ユニット１０によれば、反射部材１が、反射ユニット１０が傾斜されるべき方向α１と直交する方向β１に延在する谷型パターン２を少なくとも１つ含み、谷型パターン２が、第１反射面３１と第２反射面３２とから構成される一対の反射面３を有することにより、日射強度が比較的弱い午前及び午後の時間帯の日射強度を増加させることができる。そのため、日射強度が最大になる正午頃の日射強度を過剰に増加させることないので、ピークカットされる発電量の増加を抑えつつ、全体の発電量を増加させることができる。 On the other hand, according to the solar cell module reflecting unit 10 of the present embodiment, the reflecting member 1 has at least one valley pattern 2 extending in the direction β1 perpendicular to the direction α1 in which the reflecting unit 10 should be tilted. In addition, since the valley pattern 2 has a pair of reflecting surfaces 3 composed of a first reflecting surface 31 and a second reflecting surface 32, the solar radiation intensity is relatively low in the morning and afternoon hours. can be increased. Therefore, since the solar radiation intensity around noon when the solar radiation intensity reaches its maximum does not increase excessively, it is possible to increase the overall power generation amount while suppressing the increase in the peak-cut power generation amount.
　図１（ａ）では、反射ユニット１０は、方向β１に延在する１つの谷型パターン２を有している。図１（ｄ）では、反射ユニット１０は、方向β１に延在する３つの谷型パターン２を有している。谷型パターン２の数は２つであってもよく、４つ以上であってもよい。 In FIG. 1(a), the reflecting unit 10 has one valley pattern 2 extending in the direction β1. In FIG. 1(d), the reflecting unit 10 has three valley patterns 2 extending in the direction β1. The number of valley patterns 2 may be two, or may be four or more.
　図１（ａ）に示すように、谷型パターン２は、方向β１に接続される２つの三角柱状構造体４により画定されている。第１反射面３１及び第２反射面３２は、２つの三角柱状構造体４の接続線Ｃ１を挟んで対向する２つの三角柱状構造体４により形成される一対の面である。三角柱状構造体４の断面積は、方向α１に沿って一定である。三角柱状構造体４の断面積とは、方向α１における三角柱状構造体４の断面積を意味する。 As shown in FIG. 1(a), the valley pattern 2 is defined by two triangular prismatic structures 4 connected in the direction β1. The first reflecting surface 31 and the second reflecting surface 32 are a pair of surfaces formed by two triangular prismatic structures 4 facing each other with the connection line C1 of the two triangular prismatic structures 4 interposed therebetween. The cross-sectional area of the triangular prismatic structure 4 is constant along the direction α1. The cross-sectional area of the triangular prismatic structure 4 means the cross-sectional area of the triangular prismatic structure 4 in the direction α1.
　三角柱状構造体４は、第１傾斜面４１、第２傾斜面４２、及び底面４３の３つの側面により定義される構造体である。図１に示すように、三角柱状構造体４は底面４３を物理的に有していなくともよい。図１の三角柱状構造体４は、第１傾斜面４１及び第２傾斜面４２による切妻屋根形状を呈している。なお、三角柱状構造体４が底面４３を物理的に有さない場合、三角柱状構造体４の断面積とは、第１傾斜面４１、第２傾斜面４２、及び仮想面としての底面４３から構成される三角柱状構造体４の断面積を意味する。 The triangular columnar structure 4 is a structure defined by three side surfaces of a first inclined surface 41 , a second inclined surface 42 and a bottom surface 43 . As shown in FIG. 1, the triangular prismatic structure 4 does not have to physically have the bottom surface 43 . The triangular columnar structure 4 in FIG. 1 has a gable roof shape with a first inclined surface 41 and a second inclined surface 42 . When the triangular prismatic structure 4 does not physically have the bottom surface 43, the cross-sectional area of the triangular prismatic structure 4 is defined by the first inclined surface 41, the second inclined surface 42, and the bottom surface 43 as a virtual surface. It means the cross-sectional area of the configured triangular prismatic structure 4 .
　本実施形態では、三角柱状構造体４の第２傾斜面４２が第１反射面３１に相当し、三角柱状構造体４の第１傾斜面４１が第２反射面３２に相当する。すなわち、本実施形態では、１つの三角柱状構造体４の第２傾斜面４２と、これに隣り合う三角柱状構造体４の第１傾斜面４１とにより形成される一対の面が、第１反射面３１と第２反射面３２とから構成される一対の反射面３に相当する。 In this embodiment, the second inclined surface 42 of the triangular prismatic structure 4 corresponds to the first reflecting surface 31 , and the first inclined surface 41 of the triangular prismatic structure 4 corresponds to the second reflecting surface 32 . That is, in the present embodiment, a pair of surfaces formed by the second inclined surface 42 of one triangular prismatic structure 4 and the first inclined surface 41 of the adjacent triangular prismatic structure 4 serves as the first reflecting surface. It corresponds to a pair of reflecting surfaces 3 composed of the surface 31 and the second reflecting surface 32 .
　第１反射面３１及び第２反射面３２が、２つの三角柱状構造体４の接続線Ｃ１を挟んで対向する２つの三角柱状構造体４により形成される一対の面であることにより、反射部材１の製造が容易であるとともに、太陽電池モジュール１００における日射強度の増加効果を高めることができる。 Since the first reflecting surface 31 and the second reflecting surface 32 are a pair of surfaces formed by the two triangular prismatic structures 4 facing each other across the connecting line C1 of the two triangular prismatic structures 4, the reflection The member 1 can be easily manufactured, and the effect of increasing the solar radiation intensity in the solar cell module 100 can be enhanced.
　三角柱状構造体４の断面形状は、第１傾斜面４１と第２傾斜面４２とにより定まる角度を頂角とする二等辺三角形状であってもよい。すなわち、三角柱状構造体４において、第１傾斜面４１と第２傾斜面４２とは、方向α１に延びる頂辺を中心として対称構造を有していてもよい。これは、谷型パターン２において、第１反射面３１と第２反射面３２とが、接続線Ｃ１を中心として対称構造を有していることを意味する。第１反射面３１と第２反射面３２とが、接続線Ｃ１を中心として対称構造を有していることにより、太陽電池モジュール１００における日射強度の増加効果の均一性を確保することができる。 The cross-sectional shape of the triangular columnar structure 4 may be an isosceles triangle having an apex angle defined by the first inclined surface 41 and the second inclined surface 42 . That is, in the triangular columnar structure 4, the first inclined surface 41 and the second inclined surface 42 may have a symmetrical structure centering on the top side extending in the direction α1. This means that in the valley pattern 2, the first reflecting surface 31 and the second reflecting surface 32 have a symmetrical structure with the connecting line C1 as the center. Since the first reflecting surface 31 and the second reflecting surface 32 have a symmetrical structure with respect to the connection line C1, the uniformity of the effect of increasing the solar radiation intensity in the solar cell module 100 can be ensured. .
　図１（ｄ）では、方向β１に沿って、切妻屋根型の三角柱状構造体４が複数連なるように配置されることにより、連続する複数の谷型パターン２が形成されており、隣り合う２つの三角柱状構造体４により形成される一対の面を一対の反射面３としている。 In FIG. 1(d), a plurality of continuous valley-shaped patterns 2 are formed by arranging a plurality of gable roof-shaped triangular prism-shaped structures 4 in a row along the direction β1. A pair of surfaces formed by the two triangular prismatic structures 4 are used as a pair of reflecting surfaces 3 .
　第１反射面３１及び第２反射面３２それぞれから空に向かう方向を正方向とするとき、第１反射面３１の法線ベクトルＮ３１と前記第２反射面３２の法線ベクトルＮ３２とのなす角度θ１は、３０°以上９０°以下である。 When the direction toward the sky from each of the first reflecting surface 31 and the second reflecting surface 32 is defined as the positive direction, the normal vector N31 of the first reflecting surface 31 and the normal vector N32 of the second reflecting surface 32 are The angle θ1 to be formed is 30° or more and 90° or less.
　法線ベクトルＮ３１と法線ベクトルＮ３２とのなす角度θ１が大き過ぎると、太陽電池モジュール１００における日射強度にムラが生じやすい。太陽光発電において、発電電力は、太陽電池モジュール１００の各直列回路中の各セルで発生する電流値のうち最も低い値に影響を受ける。そのため、日射強度にムラがある場合、日射が強い部分での発電量は交流発電電力に寄与しない。一方、角度θ１が小さ過ぎると、太陽電池モジュール１００における日射強度の増加効果が小さくなる。角度θ１が３０°以上９０°以下であることにより、交流発電電力に寄与する発電量を確保しつつ、太陽電池モジュール１００における日射強度の増加効果を高めることができる。好ましくは、角度θ１は４０°以上６０°以下である。 If the angle θ 1 between the normal vector N 31 and the normal vector N 32 is too large, the intensity of solar radiation in the solar cell module 100 tends to be uneven. In photovoltaic power generation, generated power is affected by the lowest current value generated in each cell in each series circuit of solar cell module 100 . Therefore, if there is unevenness in the solar radiation intensity, the amount of power generated in a portion with strong solar radiation does not contribute to the AC power generation. On the other hand, if the angle θ1 is too small, the solar cell module 100 is less effective in increasing the solar radiation intensity. When the angle θ 1 is 30° or more and 90° or less, it is possible to enhance the effect of increasing the solar radiation intensity in the solar cell module 100 while securing the power generation amount that contributes to the AC power generation. Preferably, the angle θ1 is 40° or more and 60° or less.
　反射ユニット１０は、方向α１に傾斜角φ１で斜設して使用される。傾斜角φ１は、水平面に対して三角柱状構造体４の底面４３又は仮想面としての底面４３がなす角度である。図１（ｄ）に示すように、通常、反射ユニット１０は、受光面が南向きに斜設される太陽電池モジュール１００の南側に、反射部材１が北向きに傾斜角φ１で斜設して使用される。傾斜角φ１は、対称である太陽電池モジュール１００の設置角度に応じて適宜設定することができ、例えば、１５°以上４５°以下であってもよい。 The reflecting unit 10 is obliquely installed in the direction α 1 at an inclination angle φ 1 and used. The inclination angle φ 1 is the angle formed by the bottom surface 43 of the triangular columnar structure 4 or the bottom surface 43 as a virtual surface with respect to the horizontal plane. As shown in FIG. 1(d), the reflecting unit 10 is normally provided with the reflecting member 1 obliquely oriented northward at an inclination angle of φ 1 on the south side of the solar cell module 100 whose light-receiving surface is obliquely oriented southward. used. The inclination angle φ 1 can be appropriately set according to the installation angle of the symmetrical solar cell module 100, and may be, for example, 15° or more and 45° or less.
　反射部材１の反射面３を形成する材料としては、従来の反射板又は反射シートに用いられるものと同じものを用いることができる。例えば、反射面３を形成する材料として、アルミ蒸着されたポリエステルやポリエチレンなどのシート、アルミ蒸着された帆布、又はアルミ板などが挙げられる。 As a material for forming the reflecting surface 3 of the reflecting member 1, the same material as used for a conventional reflecting plate or reflecting sheet can be used. For example, the material for forming the reflecting surface 3 includes a sheet of polyester, polyethylene, or the like vapor-deposited with aluminum, a canvas vapor-deposited with aluminum, or an aluminum plate.
〈第二実施形態〉
　図２は、本発明の第二実施形態に係る太陽電池モジュール用反射ユニット２０を示す概略図であって、（ａ）は斜視図、（ｂ）は上面図、（ｃ）は（ｂ）のＡ１－Ａ１線断面図、（ｄ）は（ｂ）のＡ２－Ａ２線断面図、（ｅ）は太陽電池モジュール１００とともに示す参考斜視図である。反射ユニット２０は、第一実施形態の反射ユニット１０と同様に、図２（ｄ）に示すように、使用の際に、一方向に傾斜して配置される。 <Second embodiment>
2A and 2B are schematic diagrams showing a solar cell module reflection unit 20 according to a second embodiment of the present invention, in which (a) is a perspective view, (b) is a top view, and (c) is a perspective view of (b). 3D is a cross-sectional view taken along the line A1-A1, (d) is a cross-sectional view taken along the line A2-A2 of (b), and (e) is a reference perspective view showing the solar cell module 100 together. Similar to the reflection unit 10 of the first embodiment, the reflection unit 20 is arranged to be inclined in one direction during use, as shown in FIG. 2(d).
　反射ユニット２０は反射部材６を備えている。反射部材６は、反射ユニット２０が傾斜されるべき方向α２と直交する方向β２に延在する谷型パターン７を少なくとも１つ含んでいる。谷型パターン７は、第１反射面８１と第２反射面８２とから構成される一対の反射面８を有する。 The reflecting unit 20 has a reflecting member 6 . The reflecting member 6 includes at least one valley-shaped pattern 7 extending in a direction β2 orthogonal to the direction α2 in which the reflecting unit 20 is to be tilted. The valley pattern 7 has a pair of reflecting surfaces 8 composed of a first reflecting surface 81 and a second reflecting surface 82 .
　本実施形態の太陽電池モジュール用反射ユニット２０によれば、反射部材６が、反射ユニット２０が傾斜されるべき方向α２と直交する方向β２に延在する谷型パターン７を少なくとも１つ含み、谷型パターン７が、第１反射面８１と第２反射面８２とから構成される一対の反射面８を有することにより、日射強度が比較的弱い午前及び午後の時間帯の日射強度を増加させることができる。そのため、日射強度が最大になる正午頃の日射強度を過剰に増加させることないので、ピークカットされる発電量の増加を抑えつつ、全体の発電量を増加させることができる。 According to the solar cell module reflecting unit 20 of the present embodiment, the reflecting member 6 includes at least one valley pattern 7 extending in the direction β2 perpendicular to the direction α2 in which the reflecting unit 20 should be tilted. , the valley-shaped pattern 7 has a pair of reflecting surfaces 8 composed of a first reflecting surface 81 and a second reflecting surface 82, thereby increasing the solar radiation intensity in the morning and afternoon hours when the solar radiation intensity is relatively low. can be made Therefore, since the solar radiation intensity around noon when the solar radiation intensity reaches its maximum does not increase excessively, it is possible to increase the overall power generation amount while suppressing the increase in the peak-cut power generation amount.
　図２（ａ）では、反射ユニット２０は、方向β２に延在する１つの谷型パターン７を有している。図２（ｅ）では、反射ユニット２０は、方向β２に延在する３つの谷型パターン７を有している。谷型パターン７の数は２つであってもよく、４つ以上であってもよい。 In FIG. 2(a), the reflecting unit 20 has one valley pattern 7 extending in the direction β2. In FIG. 2(e), the reflecting unit 20 has three valley patterns 7 extending in the direction β2. The number of valley patterns 7 may be two, or may be four or more.
　図２（ａ）に示すように、谷型パターン７は、方向β２に接続される２つの三角柱状構造体９により画定されている。三角柱状構造体９は、第１傾斜面９１、第２傾斜面９２、及び底面９３の３つの側面により定義される構造体である。図２に示すように、三角柱状構造体９は底面９３を物理的に有していなくともよい。図２の三角柱状構造体９は、第１傾斜面９１及び第２傾斜面９２による切妻屋根形状を呈している。 As shown in FIG. 2(a), the valley pattern 7 is defined by two triangular prismatic structures 9 connected in the direction β2. The triangular columnar structure 9 is a structure defined by three side surfaces, a first inclined surface 91 , a second inclined surface 92 and a bottom surface 93 . As shown in FIG. 2, the triangular prismatic structure 9 does not have to physically have a bottom surface 93 . The triangular columnar structure 9 in FIG. 2 has a gable roof shape with a first inclined surface 91 and a second inclined surface 92 .
　本実施形態において、第１反射面８１及び第２反射面８２は、２つの三角柱状構造体９の接続線Ｃ２を挟んで対向する２つの三角柱状構造体９により形成される一対の面の一部である。より具体的には、２つの三角柱状構造体９のそれぞれは、方向α２に沿って断面積が減少する三角錐状領域９５を含んでおり、第１反射面８１及び第２反射面８２は、接続線Ｃ２を挟んで対向する２つの三角錐状領域９５により形成される一対の面である。三角錐状領域９５は、図１（ａ）における三角柱状構造体４を頂点ｘ、底点ｙ１及びｙ２を通る平面で切り取った上側部の形状を有している。なお、三角錐状領域９５の断面積とは、方向α２における三角錐状領域９５の断面積を意味する。 In the present embodiment, the first reflecting surface 81 and the second reflecting surface 82 are a pair of surfaces formed by two triangular prismatic structures 9 facing each other across the connection line C2 of the two triangular prismatic structures 9. It is part. More specifically, each of the two triangular prismatic structures 9 includes a triangular pyramidal region 95 whose cross-sectional area decreases along the direction α2, and the first reflecting surface 81 and the second reflecting surface 82 are , a pair of surfaces formed by two triangular pyramidal regions 95 facing each other with the connection line C2 interposed therebetween. The triangular pyramidal region 95 has the shape of an upper portion obtained by cutting the triangular prismatic structure 4 in FIG. The cross-sectional area of the triangular pyramidal region 95 means the cross - sectional area of the triangular pyramidal region 95 in the direction α2.
　本実施形態では、三角柱状構造体９の第２傾斜面９２のうち三角錐状領域９５と重複する部分が第１反射面８１に相当し、三角柱状構造体９の第１傾斜面９１のうち三角錐状領域９５と重複する部分が第２反射面８２に相当する。すなわち、本実施形態では、１つの三角柱状構造体９の第２傾斜面９２と、これに隣り合う三角柱状構造体９の第１傾斜面９１とにより形成される一対の面うち三角錐状領域９５と重複する部分が、第１反射面８１と第２反射面８２とから構成される一対の反射面８に相当する。 In this embodiment, the portion of the second inclined surface 92 of the triangular prismatic structure 9 that overlaps the triangular pyramidal region 95 corresponds to the first reflecting surface 81, and the first inclined surface 91 of the triangular prismatic structure 9 A portion overlapping the triangular pyramidal region 95 corresponds to the second reflecting surface 82 . That is, in the present embodiment, of the pair of surfaces formed by the second inclined surface 92 of one triangular prismatic structure 9 and the first inclined surface 91 of the adjacent triangular prismatic structure 9, the triangular pyramidal region A portion overlapping with 95 corresponds to a pair of reflecting surfaces 8 composed of the first reflecting surface 81 and the second reflecting surface 82 .
　第１反射面８１及び第２反射面８２が、２つの三角柱状構造体９の接続線Ｃ２を挟んで対向する２つの三角柱状構造体９により形成される一対の面の一部であることにより、反射部材６の製造が容易であるとともに、太陽電池モジュール１００における日射強度の増加効果を高めることができる。 The first reflecting surface 81 and the second reflecting surface 82 are part of a pair of surfaces formed by the two triangular prism-shaped structures 9 facing each other across the connection line C2 of the two triangular prism-shaped structures 9. Therefore, the reflecting member 6 can be easily manufactured, and the effect of increasing the solar radiation intensity in the solar cell module 100 can be enhanced.
　三角柱状構造体９の断面形状は、第１傾斜面９１と第２傾斜面９２とにより定まる角度を頂角とする二等辺三角形状であってもよい。すなわち、三角柱状構造体９において、第１傾斜面９１と第２傾斜面９２とは、方向α２に延びる頂辺を中心として対称構造を有していてもよい。これは、谷型パターン７において、第１反射面８１と第２反射面８２とが、接続線Ｃ２を中心として対称構造を有していることを意味する。第１反射面８１と第２反射面８２とが、接続線Ｃ２を中心として対称構造を有していることにより、太陽電池モジュール１００における日射強度の増加効果の均一性を確保することができる。 The cross-sectional shape of the triangular columnar structure 9 may be an isosceles triangle having an apex angle defined by the first inclined surface 91 and the second inclined surface 92 . That is, in the triangular columnar structure 9, the first inclined surface 91 and the second inclined surface 92 may have a symmetrical structure centering on the top side extending in the direction α2. This means that in the valley pattern 7, the first reflecting surface 81 and the second reflecting surface 82 have a symmetrical structure with the connecting line C2 as the center. Since the first reflecting surface 81 and the second reflecting surface 82 have a symmetrical structure with respect to the connection line C2 , the uniformity of the effect of increasing the solar radiation intensity in the solar cell module 100 can be ensured. .
　反射部材６は、三角柱状構造体９における三角錐状領域９５以外の部分を物理的に有していてもよく、有していなくともよい。図２の反射部材６は、三角柱状構造体９における三角錐状領域９５以外の部分を物理的に有していない場合を示す例である。 The reflecting member 6 may or may not physically have a portion other than the triangular pyramidal region 95 in the triangular prismatic structure 9 . The reflecting member 6 in FIG. 2 is an example showing a case where the triangular prismatic structure 9 does not physically have a portion other than the triangular pyramidal region 95 .
　図２（ｅ）では、方向β２に沿って、切妻屋根型の三角柱状構造体９が複数連なるように配置されることにより、連続する複数の谷型パターン７が形成されており、隣り合う２つの三角柱状構造体９により形成される一対の面の一部を一対の反射面８としている。 In FIG. 2(e), a plurality of continuous valley-shaped patterns 7 are formed by arranging a plurality of gabled roof-shaped triangular prism-shaped structures 9 in a row along the direction β2. A pair of reflecting surfaces 8 are a part of the pair of surfaces formed by the two triangular columnar structures 9 .
　第１反射面８１及び第２反射面８２それぞれから空に向かう方向を正方向とするとき、第１反射面８１の法線ベクトルＮ８１と前記第２反射面８２の法線ベクトルＮ８２とのなす角度θ２は、３０°以上９０°以下である。 When the direction toward the sky from each of the first reflecting surface 81 and the second reflecting surface 82 is defined as the positive direction, the normal vector N 81 of the first reflecting surface 81 and the normal vector N 82 of the second reflecting surface 82 are The angle θ2 to be formed is 30° or more and 90° or less.
　反射ユニット２０は、方向α２に傾斜角φ２で斜設して使用される。傾斜角φ２は、水平面に対して三角柱状構造体９の底面９３又は仮想面としての底面９３がなす角度である。図２（ｅ）に示すように、通常、反射ユニット２０は、受光面が南向きに斜設される太陽電池モジュール１００の南側に、反射部材６が北向きに傾斜角φ２で斜設して使用される。傾斜角φ２の範囲は、第一実施形態の反射ユニット１０の傾斜角φ１と同様に、対称である太陽電池モジュール１００の設置角度に応じて適宜設定することができ、例えば、１５°以上４５°以下であってもよい。 The reflection unit 20 is obliquely installed in a direction α2 at an inclination angle φ2 and used. The inclination angle φ 2 is the angle formed by the bottom surface 93 of the triangular columnar structure 9 or the bottom surface 93 as a virtual surface with respect to the horizontal plane. As shown in FIG. 2(e), the reflecting unit 20 is normally provided with the reflecting member 6 obliquely oriented northward at an inclination angle of φ2 on the south side of the solar cell module 100 whose light-receiving surface is obliquely oriented southward. used. The range of the tilt angle φ2 can be appropriately set according to the installation angle of the symmetrical solar cell module 100 , like the tilt angle φ1 of the reflection unit 10 of the first embodiment. It may be 45° or less.
　反射部材６の反射面８を形成する材料としては、第一実施形態の反射部材１の反射面３と同様に、従来の反射板又は反射シートに用いられるものと同じものを用いることができる。例えば、反射面８を形成する材料として、アルミ蒸着されたポリエステルやポリエチレンなどのシート、アルミ蒸着された帆布、又はアルミ板などが挙げられる。 As a material for forming the reflecting surface 8 of the reflecting member 6, the same material as used for a conventional reflecting plate or reflecting sheet can be used, like the reflecting surface 3 of the reflecting member 1 of the first embodiment. For example, as a material for forming the reflecting surface 8, a sheet such as polyester or polyethylene vapor-deposited with aluminum, a canvas vapor-deposited with aluminum, an aluminum plate, or the like can be used.
　以上、本発明について図面を参照して説明してきたが、本発明は上記実施形態に限定されず、種々の変更実施が可能である。上記第一及び第二実施形態においては、本発明の太陽電池モジュール用反射ユニットが備える反射部材のうち、特に反射面について説明しているが、反射部材は、反射面の裏側に設けられる基材や設置用の脚部等を有していてもよい。 Although the present invention has been described with reference to the drawings, the present invention is not limited to the above embodiments, and various modifications are possible. In the above-described first and second embodiments, of the reflecting members included in the reflecting unit for a solar cell module of the present invention, the reflecting surface is particularly described. or legs for installation.
　以下、本発明を実施例により、さらに詳細に説明するが、本発明は以下の実施例によって限定されるものではない。 The present invention will be described in more detail below with reference to examples, but the present invention is not limited by the following examples.
　従来の反射板及び本発明の反射ユニットによる太陽電池モジュールにおける日射強度の影響を調査するために、反射板と日射計を配置して試験を繰り返したが、時期や天候に日射計の結果が左右されるため、精度よく試験結果の比較検証を行うには長期間を要することが分かった。そこで、検証スピードを加速させるために、以下の数値シミュレーションを行った。 In order to investigate the effect of solar radiation intensity on a solar cell module using a conventional reflector and a reflector unit of the present invention, we repeated tests by arranging a reflector and a pyranometer. Therefore, it was found that a long period of time is required to compare and verify the test results with high accuracy. Therefore, in order to accelerate the verification speed, the following numerical simulation was performed.
　数値シミュレーションでは、３次元ＣＡＤを用いて、太陽電池モジュールの受光面、および従来の反射板及び本発明の反射ユニットを作成した。従来の反射板及び本発明の反射ユニットの表面特性としては、反射率１００％の完全鏡面反射特性を持つものと仮定した。太陽を模擬した光源からモンテカルロ法を用いてエネルギーを持った線（光線）を生成し、この光線が光源から受光面に到達するまでの、光源追跡解析を行った。ここで、太陽光源において、直達光成分は太陽軌道上を動く光源から平行光線として射出し、散乱光成分は計算領域を覆う半球状の面からモンテカルロ法を用いて射出位置、射出方向を決定し射出するとした。 In the numerical simulation, three-dimensional CAD was used to create the light-receiving surface of the solar cell module, the conventional reflector, and the reflection unit of the present invention. It is assumed that the conventional reflector and the reflecting unit of the present invention have a perfect specular reflection characteristic with a reflectance of 100%. A line (ray) with energy was generated from a light source simulating the sun using the Monte Carlo method, and a light source tracing analysis was performed from the light source to the light receiving surface. Here, in the solar light source, the direct light component is emitted as parallel rays from the light source that moves on the sun orbit, and the scattered light component is determined from the hemispherical surface covering the calculation area using the Monte Carlo method to determine the emission position and direction. I thought I would inject.
　以下の試験では、ＮＥＤＯの公開するＭＥＴＰＶ－１１の東経１３７．４３度、北緯３４．４２度の地点の２０１９年（以降、西暦は省略する。）６月２０日（晴れの日）の日射強度を用いて、６月２４日の太陽軌道で動くと仮定した光源と、８月２６日（晴れの日）の日射強度を用いて、８月２４日の太陽軌道で動くと仮定した光源とを元に、数値シミュレーションの計算を行った。なお、ＭＥＴＰＶ－１１には、直達光成分（要素番号：２）と散乱光成分（要素番号：３）の配分がデータとして記載されているため、全日射量に対する直達光成分の割合を算出することができる。 In the following test, the solar radiation intensity at 137.43 degrees east longitude and 34.42 degrees north latitude on METPV-11 published by NEDO on June 20, 2019 (hereinafter the calendar year is omitted) (clear day) , and the light source assumed to move in the sun orbit on August 24, using the solar irradiance on August 26 (clear day). Based on this, calculation of numerical simulation was performed. In METPV-11, the distribution of the direct light component (element number: 2) and the scattered light component (element number: 3) is described as data, so the ratio of the direct light component to the total amount of solar radiation is calculated. be able to.
　〔日照強度の変化の比較試験〕
　比較例１から３及び実施例１、２について、太陽電池モジュールにおける日照強度の変化を比較する試験を行った。 [Comparative test of changes in sunshine intensity]
For Comparative Examples 1 to 3 and Examples 1 and 2, a test was conducted to compare changes in sunlight intensity in solar cell modules.
　６月２０日（晴れの日）の日射強度を用いて、６月２４日の太陽軌道で動くと仮定した光源にて、太陽電池モジュールにおける日射強度の変化を比較した。 Using the solar radiation intensity on June 20th (sunny day), we compared changes in solar radiation intensity in the solar cell module with a light source assumed to move in the sun's orbit on June 24th.
〈比較例１〉
　比較例１では反射板を用いなかった。 <Comparative Example 1>
Comparative Example 1 did not use a reflector.
〈比較例２〉
　比較例２として、図３（ａ）に示すような平面状の反射面を有する反射板３０を用いた。反射板３０の傾斜角φ３０は４０°とした。 <Comparative Example 2>
As Comparative Example 2, a reflecting plate 30 having a planar reflecting surface as shown in FIG. 3(a) was used. The inclination angle φ30 of the reflector 30 was set to 40°.
〈比較例３〉
　比較例３として、図３（ｂ）に示す傾斜方向と直交する方向の断面が凹状である反射面を有する反射板４０を用いた。反射板４０の傾斜角φ４０は、４５°とした。 <Comparative Example 3>
As Comparative Example 3, a reflecting plate 40 having a reflecting surface having a concave cross section in a direction orthogonal to the tilt direction shown in FIG. 3B was used. The inclination angle φ40 of the reflector 40 was set to 45°.
〈実施例１〉
　実施例１として、図２（ａ）に示すような反射ユニット２０を用いた。反射部材６の傾斜角φ２は３０°とした。図２（ｃ）及び（ｄ）に示した角度θ２は８０．３°とした。 <Example 1>
As Example 1, a reflection unit 20 as shown in FIG. 2(a) was used. The inclination angle φ2 of the reflecting member 6 was set to 30°. The angle θ2 shown in FIGS. 2(c) and 2 (d) was set to 80.3°.
〈実施例２〉
　実施例２として、図２（ａ）に示すような反射ユニット２０を用いた。反射部材６の傾斜角φ２は、実施例２と同じく３０°とした。図２（ｃ）及び（ｄ）に示した角度θ２は４５．８°とした。 <Example 2>
As Example 2, a reflection unit 20 as shown in FIG. 2(a) was used. The inclination angle φ2 of the reflecting member 6 was set to 30° as in the second embodiment. The angle θ2 shown in FIGS. 2(c) and 2 (d) was set to 45.8°.
　比較例１から３及び実施例１、２に共通する太陽電池モジュール１００に対する反射板及び反射ユニットの設置の仕方について説明する。 A description will be given of how to install the reflector plate and the reflection unit on the solar cell module 100 common to Comparative Examples 1 to 3 and Examples 1 and 2.
　図４（ａ）は、太陽電池モジュール１００（１００ａ、１００ｂ）に対する比較例２、３の反射板３０、４０の設置の仕方を示す概略断面図である。図４（ａ）は、反射板３０、４０を傾斜方向と直交する方向から見た概略断面図である。なお、図４（ａ）では、比較例２、３の反射板３０、４０の傾斜角φ３０、傾斜角φ４０を明確に表すため、便宜上、凹状の反射板４０も平面状に示されている。図４（ａ）に示すように、太陽電池モジュール１００は、受光面が南向きに２０°の傾きを持つように設置された。太陽電池モジュール１００の最大高さは、約１．３７ｍであった。第１太陽電池モジュール１００ａと、これの南側に隣接される第２太陽電池モジュール１００ｂとの距離（最大高さ間の距離）は、約６．８０ｍであった。 FIG. 4A is a schematic cross-sectional view showing how the reflectors 30 and 40 of Comparative Examples 2 and 3 are installed on the solar cell modules 100 (100a and 100b). FIG. 4(a) is a schematic cross-sectional view of the reflectors 30 and 40 as seen from a direction orthogonal to the tilt direction. In addition, in FIG. 4A, the concave reflector 40 is also shown planar for convenience in order to clearly show the inclination angles φ 30 and φ 40 of the reflectors 30 and 40 of Comparative Examples 2 and 3. there is As shown in FIG. 4(a), the solar cell module 100 was installed so that the light-receiving surface tilted 20° toward the south. The maximum height of the solar cell module 100 was approximately 1.37 m. The distance (the distance between the maximum heights) between the first solar cell module 100a and the second solar cell module 100b adjacent to the south side thereof was approximately 6.80 m.
　図４（ａ）に示すように、比較例２、３の反射板３０、４０は、第１太陽電池モジュール１００ａと第２太陽電池モジュール１００ｂとの間に、北向きに傾斜角φ３０、傾斜角φ４０を持って斜設されるように配置された。反射板３０の傾斜角φ３０は４０°とし、反射板４０の傾斜角φ４０は４５°とした。図４（ｂ）は、比較例３の反射板４０を東側から見た概略断面図である。反射板４０の傾斜角φ４０は、図４（ｂ）に示すように定義される。比較例３の反射板４０は、図４（ｂ）に示す凹状の反射面を有していた。 As shown in FIG. 4(a), the reflectors 30 and 40 of Comparative Examples 2 and 3 are inclined northward at an angle of inclination φ 30 between the first solar cell module 100a and the second solar cell module 100b. It was arranged obliquely with an angle φ40 . The inclination angle φ30 of the reflector 30 was set to 40°, and the inclination angle φ40 of the reflector 40 was set to 45°. FIG. 4B is a schematic cross-sectional view of the reflector 40 of Comparative Example 3 as seen from the east side. The tilt angle φ 40 of the reflector 40 is defined as shown in FIG. 4(b). The reflector 40 of Comparative Example 3 had a concave reflecting surface shown in FIG. 4(b).
　図５（ａ）は、太陽電池モジュール１００（１００ａ、１００ｂ）に対する実施例１、２の各反射ユニット２０の設置の仕方を示す概略断面図である。図５（ａ）は、各反射ユニット２０を傾斜方向と直交する方向から見た概略断面図である。なお、図５（ａ）では、実施例１、２の各反射部材６の傾斜角φ２を明確に表すため、便宜上、反射部材６が平面状に示されている。図５（ａ）に示すように、比較例１、２と同様に、太陽電池モジュール１００は、受光面が南向きに２０°の傾きを持つように設置された。太陽電池モジュール１００の最大高さは、約１．３７ｍであった。第１太陽電池モジュール１００ａと、これの南側に隣接される第２太陽電池モジュール１００ｂとの距離（最大高さ間の距離）は、約６．８０ｍであった。 FIG. 5(a) is a schematic cross-sectional view showing how to install each reflection unit 20 of Examples 1 and 2 on the solar cell module 100 (100a, 100b). FIG. 5A is a schematic cross-sectional view of each reflection unit 20 viewed from a direction orthogonal to the tilt direction. In addition, in FIG. 5A, the reflecting member 6 is shown in a planar shape for the sake of convenience in order to clearly show the inclination angle φ2 of each reflecting member 6 of Examples 1 and 2. As shown in FIG. As shown in FIG. 5(a), similarly to Comparative Examples 1 and 2, the solar cell module 100 was installed such that the light receiving surface tilted southward at 20°. The maximum height of the solar cell module 100 was approximately 1.37 m. The distance (the distance between the maximum heights) between the first solar cell module 100a and the second solar cell module 100b adjacent to the south side thereof was approximately 6.80 m.
　図５（ａ）に示すように、実施例１、２の各反射ユニット２０は、第１太陽電池モジュール１００ａと第２太陽電池モジュール１００ｂとの間に、反射部材６が北向きに傾斜角φ２を持って斜設されるように配置された。実施例１、２の各反射部材６の傾斜角φ２はいずれも３０°とした。 As shown in FIG. 5A, in each of the reflecting units 20 of Examples 1 and 2, the reflecting member 6 is tilted northward at an angle of φ between the first solar cell module 100a and the second solar cell module 100b. It was arranged so as to be obliquely installed with 2 . The inclination angle φ2 of each reflecting member 6 in Examples 1 and 2 was set to 30°.
　図５（ｂ）は、実施例１の反射部材６の上面図である。図５（ｂ）に示すように、実施例１の反射部材６は、２ｍ間隔で配置される図２で示した２つの三角錐状構造体９により画定される１つの谷型パターン７を有し、角度θ２は８０．３°であった。実施例１の三角錐状構造体９の断面形状は、二等辺三角形状であった。 FIG. 5B is a top view of the reflecting member 6 of Example 1. FIG. As shown in FIG. 5(b), the reflecting member 6 of Example 1 has one valley pattern 7 defined by the two triangular pyramidal structures 9 shown in FIG. 2 arranged at intervals of 2 m. and the angle θ2 was 80.3°. The cross-sectional shape of the triangular pyramidal structure 9 of Example 1 was an isosceles triangle.
　図５（ｃ）は、実施例２の反射部材６の上面図である。図５（ｃ）に示すように、実施例２の反射部材６は、１ｍ間隔で配置される図２で示した４つの三角錐状構造体９により画定される３つの谷型パターン７を有し、角度θ２は４５．８°であった。実施例２の三角錐状構造体９の断面形状は、二等辺三角形状であった。 FIG. 5C is a top view of the reflecting member 6 of Example 2. FIG. As shown in FIG. 5(c), the reflecting member 6 of Example 2 has three valley patterns 7 defined by the four triangular pyramidal structures 9 shown in FIG. 2 arranged at intervals of 1 m. and the angle θ2 was 45.8°. The cross-sectional shape of the triangular pyramidal structure 9 of Example 2 was an isosceles triangle.
　図６は、東西方向９ｍ×南北方向４ｍの太陽電池モジュール１００のアレイを９×１２マスに分割した概略図である。横軸はアレイの東端からの距離を、縦軸はアレイの下端からの距離を示している。図６の黒塗り部に対して、比較例１から３及び実施例１、２について、日照強度の変化の比較試験を行った。結果を図７及び図８に示す。 FIG. 6 is a schematic diagram of an array of solar cell modules 100 of 9 m in the east-west direction and 4 m in the north-south direction divided into 9×12 squares. The horizontal axis indicates the distance from the east edge of the array, and the vertical axis indicates the distance from the bottom edge of the array. A comparison test of changes in the sunshine intensity was conducted for Comparative Examples 1 to 3 and Examples 1 and 2 with respect to the black-painted portion in FIG. The results are shown in FIGS. 7 and 8. FIG.
　図７は、比較例１から３及び実施例１、２について、図６の黒塗り部に設置した受光器における日射強度の変化を示したグラフである。横軸は時間を、縦軸は日照強度を示している。図８は、比較例１から３及び実施例１、２について、図６の黒塗り部に設置した受光器における日射強度の増加率を示したグラフである。横軸は時間を、縦軸は日照強度増加率を示している。 FIG. 7 is a graph showing changes in solar radiation intensity in the light receivers installed in the blackened portions of FIG. 6 for Comparative Examples 1 to 3 and Examples 1 and 2. The horizontal axis indicates time, and the vertical axis indicates sunshine intensity. FIG. 8 is a graph showing the rate of increase in solar radiation intensity in the light receivers installed in the blackened portions of FIG. 6 for Comparative Examples 1 to 3 and Examples 1 and 2; The horizontal axis indicates time, and the vertical axis indicates the increase rate of sunlight intensity.
　図８から、比較例２の平面状の反射板及び比較例３の凹状の反射板では、１２時（正午）前後で日射が最も強められ、この間に最大日射強度が大きく増加したことがわかる。一方、実施例１及び２の反射ユニットでは、１２時（正午）前後で最大日射強度は大きく変化しなかったが、９時から１１時及び１３時から１５時の日射強度が飛躍的に増加し、全体として日射強度が大きく増加したことがわかる。 From FIG. 8, it can be seen that with the planar reflector of Comparative Example 2 and the concave reflector of Comparative Example 3, the solar radiation was most intense around 12:00 (noon), and the maximum solar radiation intensity increased significantly during this time. On the other hand, in the reflection units of Examples 1 and 2, the maximum solar radiation intensity did not change significantly around 12:00 (noon), but the solar radiation intensity increased dramatically from 9:00 to 11:00 and from 13:00 to 15:00. , it can be seen that the overall solar radiation intensity increased significantly.
　最近の太陽光発電所においては、パワーコンディショナの出力に対して、太陽電池モジュールの出力が過積載となるように設計されている発電所が多い。このような発電所では、太陽電池モジュールで発電した直流電気をパワーコンディショナで一度に交流電気に変換できる量を超えた分の発電量を捨てる、いわゆるピークカットが行われている。そのため、比較例２及び３のように最大日射強度を増加させても、ピークカットされる発電量が増えるだけで、パワーコンディショナの出力の増加には大きく寄与できないおそれがある。実施例１及び２の反射ユニットによれば、日射強度が最大になる正午頃の日射強度を過剰に増加させることがないので、ピークカットされる発電量の増加を抑えつつ、全体の発電量を増加させることができる。 Many of the recent solar power plants are designed so that the output of the solar cell module is overloaded with respect to the output of the power conditioner. In such a power plant, so-called peak cut is performed in which the amount of power generated in excess of the amount of DC electricity generated by the solar cell module that can be converted into AC electricity at one time by the power conditioner is discarded. Therefore, even if the maximum solar radiation intensity is increased as in Comparative Examples 2 and 3, the amount of power generated that is peak-cut increases, and there is a possibility that it cannot greatly contribute to the increase in the output of the power conditioner. According to the reflection units of Examples 1 and 2, since the solar radiation intensity around noon when the solar radiation intensity reaches its maximum does not increase excessively, the total power generation amount can be reduced while suppressing the increase in the peak cut power generation amount. can be increased.
　また、比較例２及び３のような従来の反射板を用いると、太陽電池モジュールに対する日射強度が強すぎることで、太陽電池モジュールへダメージが生じるおそれもある。そのため、最大日射強度を増加させるよりも、午前及び午後の低日射時の日射強度を増加させることのほうが望ましい。例えば、比較例２の平面状の反射板では、全時間帯で最も発電電力が増加しているが、最大日射強度も１５０%程増加してしまうことが大きなデメリットとなる。一方、実施例１及び２の反射ユニットでは、最大日射強度はあまり増加していないが、全体としての日射強度が増加している。 Also, if conventional reflectors such as Comparative Examples 2 and 3 are used, the solar cell module may be damaged due to excessive solar radiation intensity on the solar cell module. Therefore, it is more desirable to increase the solar radiation intensity during low solar radiation in the morning and afternoon than to increase the maximum solar radiation intensity. For example, with the planar reflector of Comparative Example 2, the generated power increases most in all time zones, but the maximum solar radiation intensity also increases by about 150%, which is a major disadvantage. On the other hand, in the reflecting units of Examples 1 and 2, the maximum solar radiation intensity did not increase so much, but the overall solar radiation intensity increased.
　〔日照強度分布の比較試験〕
　次に、比較例２の平面状の反射板及び実施例１、２の反射ユニットを用いて、太陽電池モジュールにおける日照強度分布の比較試験を行った。 [Comparison test of sunshine intensity distribution]
Next, using the planar reflector of Comparative Example 2 and the reflection units of Examples 1 and 2, a comparison test of the sunlight intensity distribution in the solar cell module was conducted.
　８月２６日（晴れの日）の日射強度を用いて、８月２４日の太陽軌道で動くと仮定した光源にて、１４時における太陽電池モジュールのアレイにおける日射強度分布を比較した。結果を図９に示す。 Using the solar radiation intensity on August 26th (sunny day), we compared the solar radiation intensity distribution in the array of solar cell modules at 14:00 with a light source assumed to move in the sun's orbit on August 24th. The results are shown in FIG.
　図９は、太陽電池モジュールのアレイにおける日射強度分布を示すグラフであって、（ａ）は比較例２の場合、（ｂ）は実施例１の場合、（ｃ）は実施例２の場合を示している。横軸はアレイの東端からの距離を、縦軸はアレイの下端からの距離を示している。 FIG. 9 is a graph showing the solar radiation intensity distribution in an array of solar cell modules, in which (a) is for Comparative Example 2, (b) is for Example 1, and (c) is for Example 2. showing. The horizontal axis indicates the distance from the east edge of the array, and the vertical axis indicates the distance from the bottom edge of the array.
　図９（ａ）に示されるように、比較例２の平面状の反射板では、アレイの下端からの距離が１．５ｍ程度までは、日射強度は均一であったが、１２５％程度まで強められてしまうことがわかった。一方、図９（ｂ）に示されるように、実施例１の反射ユニットでは、日射強度の最大増加率は１２０％程度であったが、日射強度にややムラが生じた。図９（ｃ）に示されるように、実施例２の反射ユニットでは、日射強度の最大増加率は１１０％程度であり、全体でおよそ均等に日射強度が増加したことがわかった。 As shown in FIG. 9A, in the planar reflector of Comparative Example 2, the solar radiation intensity was uniform up to about 1.5 m from the bottom end of the array, but increased to about 125%. It turned out that I would be taken. On the other hand, as shown in FIG. 9B, in the reflection unit of Example 1, although the maximum increase rate of the solar radiation intensity was about 120%, the solar radiation intensity was slightly uneven. As shown in FIG. 9(c), in the reflection unit of Example 2, the maximum increase rate of the solar radiation intensity was about 110%, and it was found that the solar radiation intensity increased approximately evenly as a whole.
　太陽光発電において、発電電力は、太陽電池モジュールの各直列回路中の各セルで発生する電流値のうち最も低い値に影響を受ける。そのため、日射強度にムラがある場合、日射が強い部分での発電分は交流発電電力に寄与しない。また、日射が強い部分で発生した電力は日射が弱い部分で熱に変わってしまうためセルに悪影響を及ぼす。そのため、できるだけ日射強度にムラが生じないことが好ましい。角度θ２が４５．８°である実施例２の反射ユニットは、角度θ２が８０．３°である実施例１の反射ユニットよりも、日射強度の増加効果を高めることができると考えられる。 In photovoltaic power generation, generated power is affected by the lowest current value generated in each cell in each series circuit of the photovoltaic module. Therefore, if there is unevenness in the solar radiation intensity, the amount of power generated in the portion where the solar radiation is strong does not contribute to the AC power generation. Also, the electric power generated in the part with strong solar radiation is converted into heat in the part with weak solar radiation, which adversely affects the cell. Therefore, it is preferable that unevenness in solar radiation intensity is minimized. It is considered that the reflection unit of Example 2 , in which the angle θ2 is 45.8°, can enhance the effect of increasing the solar radiation intensity more than the reflection unit of Example 1 , in which the angle θ2 is 80.3°. .
　本発明は、ピークカットされる発電量の増加を抑えつつ、全体の発電量を増加させることが可能であり、各種の太陽電池モジュールに広く利用することができる。 The present invention can increase the overall power generation amount while suppressing an increase in peak-cut power generation amount, and can be widely used for various solar cell modules.
１，６　反射部材
２，７　谷型パターン
３，８　反射面
　３１，８１　第１反射面
　３２，８２　第２反射面
４，９　三角柱状構造体
　４１，９１　第１傾斜面
　４２，９２　第２傾斜面
　４３，９３　底面
　９５　三角錐状領域
１０，２０　太陽電池モジュール用反射ユニット
１００　太陽電池モジュール
Ｃ１，Ｃ２　接続線 Reference Signs List 1, 6 reflecting members 2, 7 valley patterns 3, 8 reflecting surfaces 31, 81 first reflecting surfaces 32, 82 second reflecting surfaces 4, 9 triangular columnar structures 41, 91 first inclined surfaces 42, 92 second inclined surfaces Surfaces 43, 93 Bottom surface 95 Triangular pyramidal regions 10, 20 Solar cell module reflection unit 100 Solar cell module C1, C2 connection line

Claims (5)

  1. 　一方向に傾斜して配置される太陽電池モジュール用反射ユニットであって、
    　反射部材を備え、
    　前記反射部材は、前記反射ユニットが傾斜されるべき方向と直交する方向に延在する谷型パターンを少なくとも１つ含み、
    　前記谷型パターンは、第１反射面と第２反射面とから構成される一対の反射面を有する、
    　反射ユニット。     A reflective unit for a solar cell module that is arranged obliquely in one direction,
    Equipped with a reflective member,
    the reflecting member includes at least one valley-shaped pattern extending in a direction orthogonal to the direction in which the reflecting unit should be tilted;
    The valley pattern has a pair of reflecting surfaces composed of a first reflecting surface and a second reflecting surface,
    reflection unit.
  2. 　前記第１反射面及び前記第２反射面のそれぞれから空に向かう方向を正方向とするとき、
    　前記第１反射面の法線ベクトルと前記第２反射面の法線ベクトルとのなす角度θが、３０°以上９０°以下である、
    　請求項１に記載の反射ユニット。     When the direction toward the sky from each of the first reflecting surface and the second reflecting surface is a positive direction,
    An angle θ between a normal vector of the first reflecting surface and a normal vector of the second reflecting surface is 30° or more and 90° or less.
    A reflecting unit according to claim 1 .
  3. 　前記少なくとも１つの谷型パターンは、前記直交する方向に接続される２つの三角柱状構造体により画定され、
    　前記第１反射面及び前記第２反射面は、前記２つの三角柱状構造体の接続線を挟んで対向する前記２つの三角柱状構造体により形成される一対の面である、
    　請求項１又は請求項２に記載の反射ユニット。     wherein the at least one valley pattern is defined by two triangular prismatic structures connected in the orthogonal direction;
    The first reflecting surface and the second reflecting surface are a pair of surfaces formed by the two triangular prismatic structures facing each other across a connection line of the two triangular prismatic structures,
    The reflecting unit according to claim 1 or 2.
  4. 　前記第１反射面及び前記第２反射面は、前記２つの三角柱状構造体の接続線を挟んで対向する前記２つの三角柱状構造体により形成される一対の面の一部である、
    　請求項３に記載の反射ユニット。     The first reflecting surface and the second reflecting surface are part of a pair of surfaces formed by the two triangular prism-shaped structures facing each other across a connecting line of the two triangular prism-shaped structures,
    A reflecting unit according to claim 3.
  5. 　前記２つの三角柱状構造体のそれぞれは、前記反射ユニットが傾斜されるべき方向に沿って断面積が減少する三角錐状領域を含み、
    　前記第１反射面及び前記第２反射面は、前記接続線を挟んで対向する前記２つの三角錐状領域により形成される一対の面である、
    　請求項４に記載の反射ユニット。     each of the two triangular prismatic structures includes a triangular pyramidal region whose cross-sectional area decreases along the direction in which the reflecting unit is to be tilted;
    The first reflecting surface and the second reflecting surface are a pair of surfaces formed by the two triangular pyramidal regions facing each other across the connection line,
    A reflecting unit according to claim 4.
PCT/JP2021/003112 2021-01-28 2021-01-28 Reflection unit for solar cell modules WO2022162845A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60178671A (en) * 1984-02-24 1985-09-12 Agency Of Ind Science & Technol Solar ray power generation system
JP2017093004A (en) * 2015-11-02 2017-05-25 株式会社高揚 Solar panel frame
CN207427072U (en) * 2017-09-21 2018-05-29 栾禄祥 Two dimension tracking array overflows anti-, straight reflexed face combination light reflection solar cell array
CN207427070U (en) * 2017-09-21 2018-05-29 栾禄祥 A kind of array overflows anti-, straight reflexed face combination light reflection device of solar generating

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60178671A (en) * 1984-02-24 1985-09-12 Agency Of Ind Science & Technol Solar ray power generation system
JP2017093004A (en) * 2015-11-02 2017-05-25 株式会社高揚 Solar panel frame
CN207427072U (en) * 2017-09-21 2018-05-29 栾禄祥 Two dimension tracking array overflows anti-, straight reflexed face combination light reflection solar cell array
CN207427070U (en) * 2017-09-21 2018-05-29 栾禄祥 A kind of array overflows anti-, straight reflexed face combination light reflection device of solar generating

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