JP6446761B1 - Mounting base for photovoltaic panels on the water - Google Patents

Abstract

Provided is a technology capable of further increasing the amount of power generation in a water-mounting base for a solar power generation panel for installing a solar power generation panel on both sides of a light receiving surface. A water-mounting base for a solar power generation panel includes a buoyant body that floats on a water surface, and a base that installs the solar power generation panel at a position above the buoyancy body. The photovoltaic panel is supported so that at least a part of the back side of the power generation panel is exposed, and sunlight is irradiated on the back side of the photovoltaic panel by reflecting the irradiated sunlight on the upper surface of the buoyancy body. A light reflecting portion for entering the reflected light is formed. [Selection] Figure 2

Description

  The present invention relates to a water installation base for a photovoltaic power generation panel.

Conventionally, solar power generation using solar energy is widely known against the background of energy source shortage and CO ₂ emission suppression, and a solar power generation device that obtains power generation by receiving sunlight with a solar power generation panel Is generalized. In recent years, surface-mounted photovoltaic power generation devices that can be installed on the surface of the sea, lakes, reservoirs, fish ponds, etc. have begun to spread rapidly, thereby ensuring a large installation area for photovoltaic power plants. Can do.

  In this connection, Patent Document 1 discloses that in a power generation apparatus that performs solar power generation on water such as a pond, production and maintenance costs can be suppressed, and maintenance work can be easily performed for a long period of time. Techniques to do this have been proposed.

Japanese Patent Application Laid-Open No. 2014-139032

  Furthermore, in recent years, a so-called double-sided light receiving type solar power generation panel that generates power by receiving light on both front and back sides by using a double-sided light-receiving type power generating element that can receive light from both sides has started to be used. Since the double-sided light receiving type solar power generation panel captures sunlight on both sides, there is an advantage that a large amount of power generation can be obtained as compared with a single-sided power generation type solar power generation panel of the same size. However, there is a situation that has not yet been proposed for a water-mounted solar power generation device that can effectively utilize the advantages of the double-sided light receiving type solar power generation panel.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide power generation in a mounting base for a solar power generation panel for installing on a water a solar power generation panel having light-receiving surfaces on both sides. It is to provide a technology capable of further increasing the amount.

  In order to solve the above problems, the present invention employs the following means.

That is, the present invention is a mounting base for a solar power generation panel for installing a solar power generation panel having both sides as light receiving surfaces on the water,
A buoyant body floating on the water surface,
A pedestal for installing the solar power generation panel at a position above the buoyancy body,
The gantry supports the photovoltaic power generation panel so that at least a part of the back side surface of the photovoltaic power generation panel is exposed,
On the upper surface of the buoyancy body, a light reflecting portion is formed that reflects the sunlight reflected on the back side surface of the photovoltaic power generation panel by reflecting the irradiated sunlight.
It is a mount for installing the photovoltaic power generation panel on the water.

According to the present invention, at least a part of the back side surface of the photovoltaic panel is exposed, and
The sunlight reflected by the light reflecting portion is reflected and the reflected light enters the back side surface of the photovoltaic power generation panel. According to this, the amount of light received on the back side surface of the photovoltaic power generation panel can be increased. As a result, the amount of power generation can be increased in the floating solar power generation using the double-sided light receiving type solar power generation panel.

  Furthermore, the light reflecting portion may have an inclined surface inclined with respect to a horizontal plane. According to this, more reflected light on the upper surface of the buoyancy body can be guided to the back side surface of the photovoltaic power generation panel, and as a result, the amount of power generation can be increased.

  Further, the light reflecting portion may be formed including shell powder. According to this, a light reflection part reflects sunlight with shell powder. Since the shell powder is derived from a natural product, the load on the aquatic environment can be reduced.

In the present invention, the gantry unit includes a gantry body to which the photovoltaic power generation panel is attached,
A connecting body for connecting the gantry body to the buoyancy body,
The gantry body is capable of switching the posture of the photovoltaic power generation panel between a use posture and a standing posture standing up from the use posture by rotating with respect to the connecting body. Also good. According to this, the operator can easily check the back side surface of the photovoltaic power generation panel by setting the posture of the gantry body to the standing posture.

  Furthermore, the said base part may have an attachment structure which attaches the said photovoltaic power generation panel by supporting the both-sides edge part which mutually opposes in the said photovoltaic power generation panel. According to this, the area of the part concealed in the back side surface of a photovoltaic power generation panel can be suppressed small. As a result, in the photovoltaic power generation panel having both light receiving surfaces, the amount of light received on the back side surface can be secured, and the amount of power generation can be increased.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to increase electric power generation amount more in the mounting stand for the photovoltaic power generation panel for installing the photovoltaic power generation panel which uses both surfaces as a light-receiving surface on the water.

FIG. 1 is an overall perspective view of a surface-mounted solar power generation device according to an embodiment. FIG. 2 is a view in the X direction of the surface-mounted solar power generation device according to the embodiment. Drawing 3 is a figure showing the attachment structure of the photovoltaic power generation panel concerning an embodiment. FIG. 4 is a diagram illustrating a state in which the photovoltaic power generation panel is attached to the gantry. FIG. 5 is a diagram illustrating a column connecting member according to the embodiment. FIG. 6 is a view showing a receiving bar connecting member according to the embodiment. FIG. 7 is a view showing the gantry body in the standing posture. FIG. 8 is an overall perspective view of the float body according to the embodiment. FIG. 9 is a view showing a cross section taken along line AA in FIG. FIG. 10 is a diagram for explaining a power generation method of the water-mounted solar power generation device according to the embodiment. FIG. 11 is a diagram showing a water installation solar power generation system as an example of use of the water installation solar power generation apparatus according to this embodiment.

  Next, embodiments of the present invention will be described with reference to the drawings. The following description is an example, and the present invention is not limited to the following contents.

[Overall structure]
FIG. 1 is an overall perspective view of a surface-mounted solar power generation device (hereinafter referred to as a power generation device) 100 according to an embodiment. FIG. 2 is a view in the X direction of the power generation apparatus 100.

  As shown in FIG. 1 and FIG. 2, the power generation device 100 is a state in which a photovoltaic power generation panel mounting base 10 (hereinafter simply referred to as a “base 10”) is raised to an appropriate inclination angle on the base 10. And the photovoltaic power generation panel 20 attached in (1). The power generation apparatus 100 is installed on the water such as the sea, a lake, a reservoir, a fish pond, and the like.

[Solar power generation panel]
First, the solar power generation panel 20 will be described. As shown in FIG.1 and FIG.2, the photovoltaic power generation panel 20 which concerns on this embodiment is formed in the substantially rectangular plate shape. The “solar power generation panel” is also called a solar panel or a solar cell module. In general, a photovoltaic power generation panel has a plate shape in which a power generation element (silicon cell) is sealed between a front side protection member and a back side protection member. Here, in this specification, the “lower surface (back side surface)” of the photovoltaic power generation panel 20 indicates a surface on the side facing the water surface when installed on the gantry 10. The “upper surface (front side surface)” of the photovoltaic power generation panel 20 indicates a surface opposite to the water surface when installed on the gantry 10.

  The photovoltaic power generation panel 20 according to the present embodiment uses a double-sided light-receiving type power generation element that can receive light from both front and back sides as a power generation element, and both the front side protection member and the back side protection member are made of a highly transparent glass plate. A so-called double glass structure that generates light by receiving light on both the front and back sides is adopted. That is, the solar power generation panel 20 according to the present embodiment can be said to be a double-sided light receiving type (also referred to as a double-sided power generation type) solar power generation panel in which both front and back surfaces are light receiving surfaces. Since such a double-sided light receiving type solar power generation panel captures sunlight on both sides, a large amount of power generation can be obtained as compared with a single-sided power generation type solar power generation panel of the same size.

  Here, when the surface temperature of the photovoltaic power generation panel exceeds a predetermined temperature, the power generation efficiency tends to decrease. Double-sided photovoltaic panels tend to have a higher surface temperature than single-sided photovoltaic panels because they generate more power than single-sided photovoltaic panels of the same size. . Since the power generation apparatus 100 can lower the surface temperature of the photovoltaic power generation panel due to the cooling effect on the water surface, it is particularly effective for photovoltaic power generation using a double-sided light reception type photovoltaic power generation panel.

[Stand]
Next, the gantry 10 will be described. The gantry 10 is a pedestal for installing the photovoltaic power generation panel 20 on the water. The gantry 10 includes a pair of vertical bars 1 and 1 provided in parallel to each other at a predetermined interval in a horizontal plane, and a vertical direction with a predetermined interval in a manner extending in a direction perpendicular to the extending direction of the vertical bars 1. And a plurality of horizontal rails 2 spanned on the rails 1. As shown in FIG. 1, the frame of the gantry 10 is formed by connecting the vertical beam 1 with the horizontal beam 2. Here, the extending direction of the horizontal beam 2 is defined as the X direction, and the direction perpendicular to the X direction in the top view, that is, the extending direction of the vertical beam 1 is defined as the Y direction. In the power generation device 100 according to the present embodiment, the photovoltaic power generation panel 20 is provided so as to be inclined with respect to the Y direction. Here, in the Y direction, the direction in which the photovoltaic power generation panel 20 is inclined down is defined as “+ Y direction”.

The gantry 10 further includes a pair of floats 3 and 3 supported at both ends by a pair of vertical bars 1 and 1 and spaced at a predetermined interval in the Y direction, and a pair of vertical bars 1 and 3. 1 and a gantry body 4 provided to be sandwiched between a pair of float bodies 3 and 3. The float body 3 and the gantry body 4 are connected by a vertical rail 1. The vertical beam 1 corresponds to a “connector” in the present invention. Further, the configuration including the gantry body 4 and the vertical beam 1 corresponds to the “gantry portion” in the present invention. The gantry unit is provided with the photovoltaic power generation panel 20 at a position above the float body 3. The gantry 10 is further separated in a + Y direction from the pair of column connection members 5 and 5 attached to the mutually opposing positions of the pair of vertical beams 1 and 1 and the pair of column connection members 5 and 5 in the vertical beam 1. And a pair of receiving bar connecting members 6 and 6 attached to the position. Although details will be described later, the gantry body 4 is connected to the vertical beam 1 via a column connecting member 5 and a receiving beam connecting member 6.

  The float body 3 is a member that obtains buoyancy for floating the power generation apparatus 100 on the water surface. The float body 3 according to the present embodiment can also be used as a scaffold for workers. An operator installs and inspects the photovoltaic power generation panel 20 using the float body 3 as a scaffold. The gantry 10 according to the present embodiment is arranged so that the photovoltaic power generation panel 20 and the float body 3 do not overlap in top view because the float body 3 is also used as a working scaffold. As shown in FIG. 1, the float body 3 is provided by being laid across a vertical rail 1. The float body 3 has a substantially rectangular parallelepiped shape, and is attached to the gantry 10 so that two opposing surfaces are orthogonal to the X direction. The float body 3 is formed by filling a foamed resin inside a casing 3a whose main material is a non-metallic material such as a highly weather-resistant resin material (for example, fiber reinforced plastic). The casing 3 a constitutes the outer surface of the float body 3. Further, the float body 3 floats on the water surface, and a part of the float body 3 projects below the vertical rail 1 and is located in the water, so that buoyancy is applied to the power generation apparatus 100. In addition, the upper surface of the float body 3 is located at the same height as the upper surface of the vertical rail 1 or slightly above. Further, an anti-slip portion 32 that functions as an anti-slip when an operator uses the float body 3 as a scaffold is formed on the upper surface of the float body 3. The float body 3 corresponds to the “buoyancy body” in the present invention. The float body 3 also has a function as a “light reflecting portion” according to the present invention. In addition, the float body 3 according to the present embodiment can increase the power generation amount of the power generation device 100. Details of the float body 3 will be described later.

  The gantry body 4 supports the photovoltaic power generation panel 20 at an appropriate inclination angle. As shown in FIGS. 1 and 2, a photovoltaic power generation panel 20 is attached to the gantry body 4 at a position above the float body 3. The gantry body 4 is provided with a pair of columns 41, 41 erected on the vertical beam 1 via the column connection member 5 and extending in parallel with the Y direction, and one end side is connected to the top of the column 41. The other end side is connected to the vertical beam 1 via the receiving beam connecting member 6, and the pair of receiving beams 42, 42 is parallel to the X direction with a predetermined interval in the Y direction. It has a pair of rail members 43 and 43 horizontally mounted in the extending aspect, and the fixture 7 which fixes the photovoltaic power generation panel 20 to the rail member 43.

  As shown in FIG. 1, in the power generation device 100 according to the present embodiment, the rail member 43 The solar power generation panel 20 is attached to the gantry 10 by sandwiching both end portions of the solar power generation panel 20 with the fixture 7.

  Here, the gantry body 4 according to the present embodiment has an attachment structure 200 that is a structure for attaching the photovoltaic power generation panel 20. FIG. 3 is a view showing a solar panel mounting structure 200 according to the present embodiment. FIG. 4 is a view showing a state where the photovoltaic power generation panel is attached, and is a cross-sectional view taken along a cross section orthogonal to the extending direction of the rail member 43. As shown in FIG. 3, the mounting structure 200 according to the present embodiment includes a guide groove 431 and a mounting portion 432 formed in the rail member 43, and the mounting tool 7.

As shown in FIG. 3, the guide groove 431 is a groove that opens in the upper surface of the rail member 43 and extends in the extending direction of the rail member 43. As shown in FIG. 4, the guide groove 431 includes a groove lower wall 43a that forms the bottom of the groove, groove side walls 43b and 43b extending upward from both ends of the groove lower wall 43a, and upper ends of the groove side walls 43b and 43b. A pair of groove upper walls 43c extending opposite to each other from
43c. Further, sandwiching member locking pieces 433 and 433 are formed on the opening edge of the guide groove 431 so as to protrude upward.

  The mounting portion 432 is a flat surface that constitutes the upper surface of the rail member 43 and extends along the guide groove 431. As shown in FIG. 3, the placement portion 432 is formed by a flange that protrudes outward in the width direction of the rail member 43, and a photovoltaic power generation panel can be placed on the placement portion 432. The rail member 43 is provided with a pair of mounting portions 432 and 432 with a guide groove 431 interposed therebetween.

  As shown in FIG. 3, the fixture 7 includes an engaging member 71, a pinching member 72, a biasing member 73, and a fastening bolt 74.

  As shown in FIG. 4, the engaging member 71 is used by being inserted into the guide groove 431. The engaging member 71 can be inserted into the guide groove 431 at an arbitrary position in the extending direction of the guide groove 431, and is formed to be slidable in the guide groove 431. Thereby, the fixture 7 can be attached to an arbitrary position in the extending direction of the rail member 43. Further, the engaging member 71 engages with the groove upper walls 43 c and 43 c forming the guide groove 431. When the engaging member 71 and the groove upper wall 43 c are engaged, the clamping member 72 connected to the engaging member 71 is installed on the rail member 43.

  As shown in FIG. 4, the urging member 73 is used by being attached to the engaging member 71. The urging member 73 has an elastic piece 731 that urges the groove lower wall 43 a of the guide groove 431. When the elastic piece 734 biases the groove lower wall 43a, the engagement member 71 is biased toward the groove upper wall 43c, and the engagement between the engagement member 71 and the groove upper wall 43c is maintained.

  As shown in FIG. 4, the clamping member 72 is used by being connected to the engaging member 71 in the guide groove 431 via a fastening bolt 74. The fixing bolt 9 is a so-called cap bolt (hexagon socket head bolt). The sandwiching member 72 is installed outside the guide groove 431 so as to face the mounting portion 432. The sandwiching member 72 includes a contact portion 721 that contacts the photovoltaic power generation panel 20 placed on the placement portion 432, and a pair of restricting portions 722 and 722 that contact the placement portion 432. The contact portion 721 further includes an upper surface contact portion 721 a that contacts the upper surface of the photovoltaic power generation panel 20 and a side end surface contact portion 721 b that contacts the side end surface of the photovoltaic power generation panel 20. The contact portion 721 is made of rubber. The sandwiching member 72 presses the upper surface of both side end portions of the photovoltaic power generation panel 20 by the upper surface contact portion 721a. Further, when the pair of restricting portions 722 and 722 sandwich the sandwiching member locking pieces 433 and 433 formed on the rail member 43, the sandwiching member 72 is restricted from moving in the width direction of the rail member 43. Yes.

  As shown in FIG. 4, the photovoltaic power generation panel 20 is supported from below by the placement portion 432, and the side end portions thereof are the upper surface contact portion 721 a of the sandwiching member 72 and the placement portion 432 of the rail member 43. It is attached to the gantry 10 by being pinched by. Since the mounting portion 432 is provided so as to extend along the guide groove 431, substantially the entire region of the side end portion of the photovoltaic power generation panel 20 can be supported. Thereby, since the area of the support surface which supports the photovoltaic power generation panel 20 is fully ensured, the photovoltaic power generation panel 20 can be supported stably. As a result, it is possible to suppress the photovoltaic power generation panel 20 from being bent. Further, since the contact portion 721 is formed of rubber, it is possible to suppress damage to the glass plate of the photovoltaic power generation panel 20 due to pressing and to absorb the expansion of the glass plate.

Further, the mounting structure 200 supports the photovoltaic power generation panel 20 by placing the side end portion of the photovoltaic power generation panel 20 on the placement portion 432 extending along the guide groove 431. Thereby, as shown in FIG. 1, the photovoltaic power generation panel 20 can be supported without the photovoltaic power generation panel 20 straddling the rail member 43. Therefore, since the photovoltaic power generation panel 20 is supported by the gantry 10 at both end portions, at least a part of the back side surface 20b of the photovoltaic power generation panel 20 is exposed. In particular, as compared with the structure in which the photovoltaic power generation panel 20 is supported across the rail member 43, the area of the portion concealed by the rail member 43 on the back side surface 20b of the photovoltaic power generation panel 20 can be reduced. As a result, in the double-sided light-receiving solar photovoltaic panel 20 having both front and back light receiving surfaces, the amount of light received on the back side surface 20b can be secured, and the amount of power generation can be increased.

  As shown in FIG. 2, since the ends of the pair of receiving bars 42, 42 on the −Y direction side are lifted by the support pillars, the pair of opposing rail members 43, 43 are the rail members 43 in the −Y direction. Is provided above the rail member 43 on the + Y direction side. Thereby, the photovoltaic power generation panel 20 is inclined and attached to the horizontal plane by lifting the end portion on the −Y direction side. The inclination angle of the photovoltaic power generation panel 20 can be appropriately set according to the environment in which the power generation apparatus 100 is installed. The photovoltaic power generation panel 20 may be provided horizontally with the water surface. However, the solar power generation panel 20 is provided such that at least one end in the Y direction is located above the upper surface of the float body 3. Therefore, the photovoltaic power generation panel 20 is provided such that at least a part of the back side surface 20b is positioned above the upper surface of the float body 3. Here, out of the pair of float bodies 3 and 3 arranged with the solar power generation panel 20 interposed therebetween, the float body 3 positioned on the −Y direction side with respect to the solar power generation panel 20 is referred to as the first float body 3A. The float body 3 located on the + Y direction side is referred to as a second float body 3B. As a result, as shown in FIG. 2, in the power generation apparatus 100, a panel back space S that is a space below the back side surface 20b of the photovoltaic power generation panel 20 and above the top surface of the first float body 3A is formed. Has been. The panel back space S is indicated by hatching in FIG.

  FIG. 5 is a view showing the column connecting member 5 according to this embodiment. FIG. 6 is a view showing the receiving bar connecting member 6 of the gantry 10 according to the present embodiment. FIG. 7 is a view showing the gantry body 4 in a standing posture. In the gantry 10 according to this embodiment, the gantry body 4 is connected to the vertical beam 1 by the receiving beam connecting member 6 and the column connecting member 5, so that the posture of the gantry body 4 is illustrated from the usage posture shown in FIG. 2. 7 can be changed to the standing posture.

  As shown in FIG. 5, the column connecting member 5 includes a fixing portion 51 fixed to the vertical rail 1 with a bolt or the like, and a support piece 52 that protrudes upward from the fixing portion 51 and has a plate shape orthogonal to the X direction. And a notch 52a formed in the support piece 52. The notch 52a penetrates the support piece 52 in the X direction, and extends from the center of the support piece 52 to the upper end. Here, a threaded shaft portion 41a is formed at a portion of the support column 41 that is connected to the vertical rail 1 and is formed with a thread and protruding in the X direction. The notch 52a is formed so as to receive the screw shaft portion 41a. The column connecting member 5 is configured such that the support piece 52 is sandwiched between the column 41 and the nut N by screwing the nut N with the screw shaft portion 41a in a state where the screw shaft portion 41a is received in the notch 52a. The support column 41 is connected. Here, on the surface of the support piece 52 facing the support column 41, an engagement groove group 52b in which horizontally extending grooves are arranged vertically is formed. Further, on the surface of the support column 41 that faces the support piece 52, an engagement protrusion group 41b that is received in the groove of the engagement groove group 52b and engages with the engagement groove group 52b is formed. In a state where the vertical beam 1 and the column 41 are connected, the movement of the column 41 in the Y direction is restricted by the screw shaft portion 41a being received in the notch 52a, and the support piece 52 is sandwiched between the column 41 and the nut N. Thus, the movement of the support column 41 in the X direction is restricted, and the engagement protrusion group 41b is engaged with the engagement groove group 52b, so that the movement of the support column 41 in the vertical direction is restricted. From this state, the screw shaft portion 41a and the nut N are disengaged, the engagement protrusion group 41b and the engagement groove group 52b are disengaged, and the screw shaft portion 41a is slid to move the upper end of the notch 52a. The connection between the vertical beam 1 and the support column 41 can be released by pulling it out from.

As shown in FIG. 6, the receiving beam connecting member 6 includes a fixed portion 61 fixed to the vertical beam 1 with a bolt or the like, and a shaft support piece that protrudes upward from the fixed portion 61 and has a plate shape orthogonal to the X direction. 62 and a rotating shaft portion 6a protruding from the shaft support piece 62 in the X direction. A screw thread is formed on the rotation shaft portion 6a. Here, a bearing hole 42a, which is a through-hole having a diameter larger than that of the rotation shaft portion 6a, penetrates in the X direction at a connection portion of the receiving bar 42 with the vertical beam 1. The receiving bar connecting member 6 holds the receiving bar 42 between the shaft support piece 62 and the nut N by screwing the nut N into the screw shaft part 41a in a state where the rotating shaft part 6a is inserted into the bearing hole 42a. The vertical beam 1 and the column 41 are connected. The receiving bar connecting member 6 pivotally supports the receiving bar 42 so as to be rotatable around the rotation shaft portion 6a. Here, a surface of the shaft support piece 62 facing the receiving bar 42 is formed with a contact protrusion groove group 62b in which horizontally extending protrusions are arranged vertically. In a state where the vertical beam 1 and the receiving beam 42 are connected, the contact protruding groove group 62b is in contact with the receiving beam 42, so that the receiving beam 42 is prevented from rotating carelessly.

  When the power generator 100 is used, the receiving frame 42 is connected to the vertical beam 1 via the receiving beam connecting member 6, and the column 41 is connected to the vertical beam 1 via the column connecting member 5. The posture 4 is maintained at the use posture shown in FIG. In this state, since the column 41 is fixed to the vertical beam 1, the rotation of the receiving beam 42 around the rotation shaft portion 6a is restricted. From this state, by releasing the connection between the vertical beam 1 and the column 41, the receiving beam 42 can be rotated around the rotation axis. Thereby, the photovoltaic power generation panel 20 can be rotated around the X axis, and the angle formed by the photovoltaic power generation panel 20 and the horizontal plane can be expanded from the state of use. As a result, as shown in FIG. 7, the posture of the gantry body 4 can be set to a standing posture in which the opening between the photovoltaic power generation panel 20 and the horizontal plane is larger than the usage posture. By setting the posture of the gantry body 4 to the standing posture, the operator can easily check the back side surface 20b of the photovoltaic power generation panel 20. Note that the gantry 10 may have posture maintaining means for fixing the gantry body 4 in the standing posture and maintaining the standing posture.

  Next, details of the float body 3 according to the present embodiment will be described. FIG. 8 is an overall perspective view of the float body 3 according to the present embodiment. As shown in FIG. 8, the float body 3 includes a float main body 31 having a substantially rectangular parallelepiped shape, a non-slip portion 32 formed on the upper surface of the float main body 31, and both ends of the float main body 31 in the X direction. A connecting piece 33 formed.

  The connecting piece 33 is a part for connecting the float body 3 to the vertical rail 1 and has a plate shape parallel to the XY plane. The float body 3 is attached to the gantry 10 by fixing the connecting piece 33 placed on the upper surface of the vertical beam 1 to the vertical beam 1.

  The anti-slip portion 32 is formed by arranging a plurality of anti-slip protrusions 321 having a substantially prismatic shape and projecting upwards at predetermined intervals in the XY direction. FIG. 9 is a view showing a cross section taken along line AA in FIG. As shown in FIG. 9, the top surface 321a of the anti-slip protrusion 321 is an inclined surface. The top surface 321a is inclined so as to be lowered toward the + Y direction. Thereby, as shown in FIG. 2, the top surface 321 a of the anti-slip protrusion 321 in the first float body 3 </ b> A faces the back side surface 20 b of the photovoltaic power generation panel 20.

  The worker performs work in a state where his / her foot is placed on the anti-slip portion 32 including the plurality of anti-slip protrusions 321. Here, since the anti-slip protrusions 321 are provided at intervals, a groove whose upper surface is the bottom surface of the float body 31 is formed between the adjacent anti-slip protrusions 321. Therefore, the water that rides on the anti-slip portion 32 from the water falls into the groove, flows through the groove, and falls into the water. Thereby, it is suppressed that water accumulates in the non-slip portion 32. That is, the anti-slip protrusion 321 causes the operator's feet to drain. Thereby, it is suppressed that an operator slips with water and falls from the float body 3, etc., and the safety | security of work is ensured.

  The float body 3 according to the present embodiment also has a function as a light reflecting portion that causes light to enter the back side surface 20b of the photovoltaic power generation panel 20 by reflecting sunlight. The float body 3 can cause the reflected light to enter the back side surface 20 b of the photovoltaic power generation panel 20 by reflecting the sunlight irradiated to the float body 3 by the light reflecting portion. Details will be described below.

  The float body 3 according to the present embodiment is formed by including a light reflecting material in addition to the above-mentioned resin material having high weather resistance as the main material as a material of the casing 3a forming the outer surface. More specifically, the casing 3a of the float body 3 is formed by including shell powder as a light reflecting material. Shell powder is a powdery material obtained by pulverizing shells such as scallops into ultrafine particles. Certain shellfish, such as scallops, produce a glossy substance, whose main component is calcium carbonate, also called nacre, inside the shell. Since the shell powder produced from the shell contains the nacreous layer, it is used as a light reflecting material. The float body 3 according to the present embodiment includes irradiated solar light as compared with the float body 3 that does not include the light reflecting material in the material of the casing 3a by including shell powder as the light reflecting material in the material of the casing 3a. Can be reflected with high reflectivity. By forming the casing 3a including the light reflecting material, the surface of the casing 3a, that is, the outer surface of the float body 3 functions as a light reflecting portion.

Here, examples of the light reflecting material include, in addition to the shell powder, metal fine particles such as glass fine particles, aluminum fine particles, silver fine particles, and copper fine particles. However, the load on the underwater environment can be reduced by using a shell powder derived from a natural product as the light reflecting material. As a method for imparting a function as a light reflecting portion to the outer surface of the float body 3, for example, in the molding of the casing 3a, a light reflecting material may be mixed with a resin material as a main material, or a light reflecting material may be used. The contained sheet material may be transferred to the surface of the casing 3a.
<Power generation method>
Next, a power generation method of the power generation apparatus 100 according to this embodiment will be described. FIG. 10 is a view in the X direction of the power generation apparatus 100 and is a diagram for explaining a power generation method. In the photovoltaic power generation panel 20, a white arrow indicated by a symbol L <b> 1 in the drawing schematically represents an optical path of sunlight irradiated directly from the sun to the power generation apparatus 100. A hatched arrow indicated by L2 in the drawing schematically represents an optical path of reflected sunlight reflected by the float 3.

  As shown in FIG. 10, the power generation apparatus 100 is installed with the front side surface 20 a (that is, the upper surface) of the photovoltaic power generation panel 20 facing the sun. More specifically, since the direction of the sun with respect to the power generation device 100 changes with the passage of time, for example, so that the time during which the front side surface 20a of the photovoltaic power generation panel 20 is directed to the sun during the sunshine hours is the longest. The direction of the photovoltaic panel 20 is set.

  The sunlight directly irradiated on the front side surface 20 a of the solar power generation panel 20 enters the front side surface 20 a of the solar power generation panel 20. The photovoltaic power generation panel 20 generates power using the light received by the front side surface 20a.

And sunlight is also irradiated to the upper surface of the float body 3. Sunlight irradiated on the upper surface of the float body 3 is reflected by the light reflecting material contained in the casing 3a. As described above, the photovoltaic power generation panel 20 is installed above the float body 3, the back side surface 20b of the photovoltaic power generation panel 20 is exposed, and the back side surface 20b of the photovoltaic power generation panel 20 and the top surface of the float body 3 are exposed. Since the panel back space S is formed between them, a part of the reflected light reflected by the upper surface of the float body 3 passes through the panel back space S and reaches the back side of the photovoltaic power generation panel 20. That is, the float body 3 can cause reflected light to enter the back side surface 20 b of the photovoltaic power generation panel 20 by reflecting the sunlight irradiated on the upper surface of the float body 3. The photovoltaic power generation panel 20 generates power using the light received by the back side surface 20b.

  Furthermore, the float body 3 according to the present embodiment increases the directivity of reflected light by forming the top surface 321a of the anti-slip protrusion 321 with an inclined surface, and collects light on the back side surface 20b of the photovoltaic power generation panel 20. Can be lighted. As shown in FIG. 10, the top surface 321 a of the anti-slip protrusion 321 of the first float body 3 </ b> A is formed so as to face the back side surface 20 b of the photovoltaic power generation panel 20. Thereby, more reflected light on the upper surface of the float can be guided to the back side surface 20 b of the photovoltaic power generation panel 20.

[Action / Effect]
As described above, the gantry 10 according to the present embodiment supports the photovoltaic power generation panel 20 above the float body 3 so that at least a part of the back side surface 20b is exposed, and the photovoltaic power generation panel 20 A panel back space S is formed between the back side surface 20 b and the top surface of the float body 3. And the light reflection part which reflects the irradiated sunlight and makes reflected light inject into the back side surface 20b of the photovoltaic power generation panel 20 is formed in the upper surface of the float 3. Thereby, the light reception amount in the back side surface 20b of the photovoltaic power generation panel 20 can be increased. As a result, according to the gantry 10 according to the present embodiment, the amount of power generation can be increased in the floating solar power generation using the double-sided light reception type solar power generation panel 20. Moreover, since the power generation amount per one power generation device 100 increases, the power generation efficiency with respect to the installation area of the power generation device 100 can be improved.

  Note that the gantry 10 according to the present embodiment is arranged so that the photovoltaic power generation panel 20 and the float body 3 do not overlap in top view because the float body 3 is also used as a working scaffold. Therefore, the upper surface of the float body 3 can be irradiated with sunlight, and as a result, the reflected light of sunlight can be incident on the back side surface 20 b of the photovoltaic power generation panel 20.

  Further, the gantry 10 has a top surface 321a of the anti-slip protrusion 321 as an inclined surface that is inclined with respect to a horizontal plane. In other words, the light reflecting portion has an inclined surface that is inclined with respect to the horizontal plane. Thereby, more reflected light on the upper surface of the float body 3 can be led to the back side surface 20b of the photovoltaic power generation panel 20, and the light condensing property to the back side surface 20b of the photovoltaic power generation panel 20 on the float upper surface can be increased. Can be increased. As a result, the power generation amount of the power generation apparatus 100 can be further increased. In addition, by making the top surface 321a of the anti-slip protrusion 321 into an inclined surface, there is an advantage that the water that rides on the top surface 321a of the anti-slip protrusion 321 easily flows down.

However, in the present invention, the upper surface of the anti-slip protrusion 321 may not be formed as an inclined surface. The upper surface of the anti-slip protrusion 321 may be horizontal. The anti-slip part 32 may be constituted by a plurality of grooves extending in one direction instead of the protrusions. The float body 3 should just have the function as a light reflection part which makes light inject into the back side surface 20b of the photovoltaic power generation panel 20 in this invention. Therefore, the float body 3 does not have the anti-slip part 32, and the float main body 31 may have a function as a light reflection part. However, the float body 3 having the anti-slip portion 32 can prevent the operator from sliding off the float body 3. In addition, since the upper surface of the float body 3 has an uneven shape due to the arrangement of the anti-slip protrusions 321 in the anti-slip part 32, the sunlight irradiated to the anti-slip part 32 can be irregularly reflected. Therefore, a certain amount of reflected light can enter the back side surface of the photovoltaic power generation panel regardless of the direction of the sun with respect to the power generation apparatus 100. The float body 3 may have an uneven shape on the outer surface without having the anti-slip protrusion 321. Moreover, the float body 3 does not need to have the casing 3a, and the outer surface should just have a function as a light reflection part. Here, in the float body 3, reflected light can be incident on the back side surface 20 b of the photovoltaic power generation panel 20 by reflecting the sunlight on the upper surface irradiated with sunlight. Therefore, the float body 3 may function not only on the entire outer surface but only on the upper surface as a light reflecting portion. In that case, at least the upper surface of the float body 3 should just contain the light reflection material.

  Further, the gantry 10 uses a shell powder having gloss derived from a natural product as a light reflecting material. That is, the light reflecting portion is formed including shell powder. Thereby, the load to underwater environment can be reduced.

  Further, the gantry 10 switches the posture of the photovoltaic power generation panel 20 between the use posture and the standing posture that stands up from the use posture by the gantry body 4 rotating with respect to the vertical beam 1. Is possible. Thereby, the operator can inspect the back side surface 20b of the photovoltaic power generation panel 20 easily by making the attitude | position of the mount main body 4 into a standing attitude.

  Further, the gantry body 4 has an attachment structure 200 for attaching the photovoltaic power generation panel 20 by supporting opposite side ends of the photovoltaic power generation panel 20. According to this, the area of the part concealed by the rail member 43 in the back side surface 20b of the photovoltaic power generation panel 20 can be suppressed small. As a result, in the double-sided light-receiving solar photovoltaic panel 20 having both front and back light receiving surfaces, the amount of light received on the back side surface 20b can be secured, and the amount of power generation can be increased.

  FIG. 11 is a diagram illustrating a floating solar power generation system 1000 (hereinafter referred to as a power generation system 1000) as an example of use of the power generation apparatus 100 according to the present embodiment. As shown in FIG. 11, the power generation system 1000 is configured by connecting a plurality of power generation apparatuses 100 arranged in the XY directions. In the power generation system 1000, the power generation apparatuses 100 arranged in the Y direction use a common vertical beam 1. Moreover, the power generators 100 arranged in the X direction use a common cross rail 2 and a common rail member 43. Thereby, the power generators 100 arranged in the XY directions are connected. In addition, the power generators 100 adjacent in the Y direction use a common float body 3. Supply of the reflected sunlight of each solar power generation panel 20 is performed by the float body 3 adjacent to the −Y direction side of the solar power generation panel 20. The power generation system 1000 can obtain larger power than the power generation apparatus 100 alone by arranging a plurality of power generation apparatuses 100 to form a photovoltaic power generation array.

  The present invention has been described above with reference to the embodiments. However, the present invention is not limited to the above embodiments. Further, the contents exemplified in the above embodiment can be combined as long as there is no contradiction.

DESCRIPTION OF SYMBOLS 100 ... Water installation solar power generation device 10 ... Water installation stand 20 ... Solar power generation panel 1 ... Vertical beam 2 ... Horizontal beam 3 ... Float body (buoyancy body)
31 ... Float body 32 ... Anti-slip part 4 ... Base body 41 ... Post 42 ... Receiving bar 43 ... Rail member 5 ... Post connecting member 6 ... Receiving bar connection Member (shaft member)
7 ... Fixture

Claims (4)

A photovoltaic power generation panel mounting base for installing a solar power generation panel on both sides of a light receiving surface,
A buoyant body floating on the water surface,
A pedestal for installing the photovoltaic power generation panel at a position next to the buoyancy body and above the buoyancy body,
The pedestal portion is formed so that at least a part of the back side surface of the photovoltaic power generation panel is exposed , and a space is formed between the back side surface of the photovoltaic power generation panel and the top surface of the buoyant body. Supporting the photovoltaic panel,
On the upper surface of the buoyant body, a light reflecting portion is formed on the back side surface of the photovoltaic power generation panel to reflect the reflected sunlight so as to reflect the irradiated sunlight to the space. and,
The light reflecting portion has an inclined surface inclined with respect to a horizontal plane ,
The inclined surface is inclined so as to be lowered toward the photovoltaic power generation panel side,
A stand for the installation of photovoltaic panels on the water. The light reflecting portion is formed to include a shell powder, water installation for stand photovoltaic panel according to claim 1. The gantry unit is a gantry body to which the photovoltaic power generation panel is attached;
A connecting body for connecting the gantry body to the buoyancy body,
The gantry body is capable of switching the posture of the photovoltaic power generation panel between a use posture and a standing posture standing up from the use posture by rotating with respect to the connecting body. The water installation stand for the photovoltaic power generation panel according to claim 1 or 2 . The gantry has an attachment structure for attaching the photovoltaic power generation panel by supporting opposite side ends of the photovoltaic power generation panel.
The mount for water installation of the photovoltaic power generation panel according to any one of claims 1 to 3 .

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