JP2015231263A - Photovoltaic power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photovoltaic power generator that can easily co-exist with an environment filled with water, such as a scenery pond.SOLUTION: A photovoltaic power generator includes water supply means for supplying water onto the light-receiving surface of a photovoltaic power generator panel 2, so that at least a part of the light-receiving surface is in a state contact with flowing water or static water, or the light-receiving surface is located underwater. In this photovoltaic power generator, a cavity may be formed on the lower surface side of the photovoltaic power generator panel 2, and the light-receiving surface may have a gradient.

Description

  The present invention relates to a solar power generation device.

  Solar power generation is clean and does not emit carbon dioxide, radiation, etc. during power generation, and can be cited as one of the solutions to the energy resource problem that becomes more serious every year. For example, in a building such as a building, in most cases, a solar power generation device is installed on a sunny rooftop.

  By the way, recently, for the purpose of improving the landscape and preventing the heat island phenomenon, there are an increasing number of buildings with a landscaped pond on the rooftop. It is very difficult to install a solar power generator while providing In addition, there is a case where it is not desired to expose an existing solar power generation device that does not fit the design of the landscape where the scenic pond is arranged. Therefore, there is a risk that the number of cases in which the choice between the installation of a photovoltaic power generation device or the formation of a scenic pond is forced will increase in the future.

  The present invention has been made in consideration of the above-described matters, and an object of the present invention is to provide a solar power generation device that can easily coexist with an environment where water such as a scenic pond is stored.

  In order to achieve the above object, the photovoltaic power generation apparatus according to the present invention has water on the light receiving surface so that at least a part of the light receiving surface of the solar power generation panel is in contact with water or still water. A water supply means for supplying is provided, or the light receiving surface is located in water (Claim 1).

  In the solar power generation device, a cavity may be formed on the lower surface side of the solar power generation panel (Claim 2).

  In the solar power generation device, the light receiving surface may have a gradient.

  In the solar power generation device, the light receiving surface has a gradient so that the water supplied onto the light receiving surface by the water supply means flows on the light receiving surface, and the solar power generation panel has a direction in which the water flows. Between the two photovoltaic power generation panels arranged in a row and connected in the direction of water flow, a step where the downstream photovoltaic power generation panel is lowered may be provided (Claim 4).

  According to the present invention, a solar power generation device that can easily coexist with an environment that has water such as a scenic pond can be obtained.

  That is, in the solar power generation device of the invention according to each claim of the present application, it is configured to allow the light receiving surface of the solar power generation panel to be in contact with water. A part of the environment can be used as the installation space for solar power generation panels, and even in a small land, it is possible to provide both an environment with water such as a scenic pond and a solar power generation device. It becomes easy.

  Moreover, in this solar power generation device, the light receiving surface of each solar power generation panel comes into contact with water, so that it is possible to expect an improvement in power generation efficiency due to water cooling, and dirt is attached to the light receiving surface exposed to running water. Since it is difficult, it can be expected to maintain high power generation efficiency over a long period of time.

  In the solar power generation device of the invention according to claim 2, by suppressing the decrease in output of the solar power generation panel by ventilating the inside of the cavity formed on the lower surface side of the solar power generation panel and maintaining the dry state, long-term reliability And electrical safety can be improved.

  In the solar power generation device according to the third and fourth aspects of the present invention, if the gradient of the light receiving surface is made relatively gentle and water is allowed to flow gently on the light receiving surface, not only the amount of water used can be reduced, but also solar power generation. This leads to the merit that the running cost of the water supply means for supplying water to the panel can be suppressed.

  In particular, in the solar power generation device of the invention according to claim 4, by allowing water to flow stepwise on the light receiving surface of each solar power generation panel, it can appear as a basin as a whole. Solar power panels, which are often recognized as artifacts that are difficult to harmonize with the environment where the water is kept, can be very well adapted to the environment where the water is kept.

It is explanatory drawing which shows roughly the structure of the solar power generation device which concerns on one embodiment of this invention. (A) is a top view which shows schematically the structure of the said solar power generation device, (B) is a top view which shows schematically the structure of the mount frame of the said solar power generation device. It is the elements on larger scale which show the structure of the said base roughly. FIG. 4 is a cross-sectional view taken along the line A-A ′ of FIG. 3. FIG. 5A is an enlarged view of a portion B in FIG. 4, and FIG. 5B is a view taken along the arrow B ′ in FIG. (A) is a C partial enlarged view of FIG. 4, (B) is a C 'arrow view of (A). (A) is a D partial enlarged view of FIG. 4, (B) is a D 'arrow view of (A).

  Embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the solar power generation apparatus according to the present embodiment includes a plurality of solar power generation panels 2 installed in an artificial pond (for example, a landscape pond) 1. The plurality of photovoltaic power generation panels 2 are arranged in a step shape, and are configured such that water flows in a step shape on a light receiving surface formed on the upper surface of each photovoltaic power generation panel 2 so as to be seen as a basin as a whole. In FIG. 1, 3 is a wood deck facing the artificial pond 1, and 4 is an entry prevention fence provided on the wood deck 3.

  As shown in FIG. 2 (A), the plurality of photovoltaic power generation panels 2 are arranged in a matrix in a plan view (4 rows and 32 columns in the illustrated example) along the inner side of the outer wall 1a of the artificial pond 1, and the same column The photovoltaic power generation panels 2 constituting 5 are arranged at substantially the same height, and the height is varied between the rows 5 so as to form a step shape as a whole (see also FIG. 4). Hereinafter, when the four rows 5 constituted by the photovoltaic power generation panels 2 are distinguished from the highest row to the lowest row, they are referred to as 5A, 5B, 5C, and 5D in order.

  In this solar power generation device, water is supplied onto the light receiving surface of each solar power generation panel 2 constituting the highest row 5A, and this water flows so as to sequentially traverse each row 5A to 5D (FIG. 1, FIG. 4). That is, a plurality of photovoltaic power generation panels 2 are arranged in the direction in which water flows, and a step where the downstream photovoltaic power generation panel 2 is lowered is provided between two photovoltaic power generation panels 2 that are continuous in the direction in which water flows. Yes. As shown in FIG. 4, the upper surface of the outer wall 1 a of the artificial pond 1 is also formed in a step shape like the photovoltaic power generation panel 2.

  As described above, this solar power generation device is configured to allow the light receiving surface of the solar power generation panel 2 to be in contact with the water, so that one of the environments where water such as a scenic pond is filled with water. Can be used as an installation space for the photovoltaic power generation panel 2, and even in a small land, it is easy to provide both an environment with water such as a landscaped pond and a photovoltaic power generation device. .

  In addition, in this solar power generation device, the light receiving surface of each solar power generation panel 2 comes into contact with water, so that it is possible to expect improvement in power generation efficiency by water cooling, and dirt is attached to the light receiving surface exposed to running water. Therefore, it is possible to expect a long-term maintenance of high power generation efficiency.

  In addition, in this solar power generation device, by allowing water to flow stepwise on the light-receiving surface of each solar power generation panel 2, it can look like a basin as a whole, and usually has water. Solar power panels, which are often recognized as artifacts that are difficult to harmonize with the environment, can be very well adapted to the environment with water.

  In addition, light flows gently on the light receiving surface of each photovoltaic power generation panel 2 so that light transmission resistance to the water flowing on the light receiving surface is reduced (the light receiving rate of the photovoltaic power generation panel 2 does not decrease). It is preferable to make the gradient of the surface relatively gentle, and in this example, the gradient is 1/100. And it is not only the reduction of the amount of water used but also the running cost of a circulation pump (not shown) as a water supply means for supplying water to the photovoltaic power generation panel 2 to make the water flow gently on the light receiving surface in this way. This leads to the merit that it can be suppressed. In addition, about water, although the spring water is utilized in this example, it is not restricted to this, You may utilize tap water etc. In this example, a circulation pump is used to circulate and use the water that has flowed down on the photovoltaic power generation panel 2, but the water may not be circulated. Furthermore, in this example, although it is not illustrated so that the presence or amount of flowing water supplied to the photovoltaic power generation panel 2 can be divided into a plurality of sections (for example, four sections), the plurality of water supply means have a plurality of Each of the water supply flow paths is provided with an on-off valve for adjusting the flow rate, and the opening of each on-off valve can be adjusted by a control unit (not shown) according to the season and weather. You may make it control the presence and quantity of flowing water collectively, without dividing.

  Here, the water supply means is solar power generation so that water flows uniformly on the light receiving surface of each solar power generation panel 2 and the plurality of solar power generation panels 2 appear as a basin covered with a thin water film as a whole. As a water supply port (water outlet) to the panel 2 (the highest column 5A), it is desirable to have a smooth line-shaped water supply port extending in the direction (row direction) in which the photovoltaic power generation panels 2 constituting the column 5A are arranged. Therefore, in this example, as shown in FIGS. 4 and 6A, a side groove 6 is arranged on the upstream side of the plurality of photovoltaic power generation panels 2 (row 5A), and the water accumulated in the side groove 6 overflows. Thus, it is configured to be supplied to the photovoltaic power generation panel 2 from a gap 8 which is a line-shaped water supply port formed between the side groove 6 and a lid (decorative lid) 7 covering the side groove 6 (FIG. 6). (See (A)). In FIG. 6A, reference numeral 9A denotes a guard for preventing large dust or the like from entering the gap 8. Reference numeral 9B denotes a spacer for securing a gap 8 between the side groove 6 and the lid 7.

  Further, in order to allow water to flow uniformly on the light receiving surface (surface) of the photovoltaic power generation panel 2, it is necessary to minimize the unevenness between the photovoltaic power generation panels 2. Therefore, the photovoltaic power generation panel 2 It is desirable that the gantry that supports the frame from the lower side is configured to be adjustable in level.

  In this example, as shown in FIGS. 2B and 3, a plurality of photovoltaic power generation panels 2 are supported by a gantry (base) 10 configured in a lattice shape in plan view. As shown in FIG. 3, the gantry 10 includes a plurality of columns 11, a plurality of vertical connecting members 12 that connect two columns 11 arranged in the column direction (Y direction in FIG. 3) of the photovoltaic power generation panel 2, It has a plurality of horizontal connecting members 13 that connect the two support columns 11 arranged in the row direction (X direction in FIG. 3) of the photovoltaic panel 2.

  As shown in FIGS. 5A and 5B, the end of the vertical connecting member 12 is fixed to the fixing member 14 fixed (welded) to the side surface of the column 11 by a fastener (for example, a bolt / nut) 15. It is concluded. And the through-hole 12a for letting the fastener 15 pass is provided in the both ends of the vertical connection member 12, and at least one through-hole 12a becomes a through-hole (loose hole) long in the up-down direction which contributes to level adjustment. Yes. Further, as shown in FIGS. 6A and 6B and FIGS. 7A and 7B, the vertical connecting member 12 that connects the support column 11 and the base portion 16 is an attachment member attached to the base portion 16. 17 is fastened by a fastener 15.

  On the other hand, as shown in FIGS. 5A and 5B, one end of the lateral connecting member 13 is fixed (welded) to the side surface of the column 11, and the other end is fixed (welded) to the side surface of the column 11. Fastened to the member 18 by two fasteners (for example, bolts and nuts) 19. The other end of the horizontal connecting member 13 is provided with two through holes (not shown) through which the fastener 19 is passed. In addition, as shown in FIGS. 3, 5 </ b> A and 5 </ b> B, two holding portions 20 for holding the photovoltaic power generation panel 2 are provided on the upper surface of the horizontal connecting member 13.

  Further, in order to prevent a terminal box (not shown) arranged on the back side of each photovoltaic power generation panel 2 from being submerged, between the photovoltaic power generation panels 2 or between the photovoltaic power generation panels 2 and the surrounding portion thereof, Caulking using the caulking material 21 is performed so that water does not fall below the panel 2 (FIGS. 5A and 5B, FIGS. 6A and 6B, and FIG. 7A). And (B)).

  And in this solar power generation device, as shown in FIG. 4, while forming the cavity 22 in the lower surface side of the photovoltaic power generation panel 2, the ventilation port 22A for connecting this cavity 22 to external space is provided, and the cavity 22 is provided. By maintaining the dry state by ventilating the inside, a decrease in the output of the photovoltaic power generation panel 2 is suppressed, and long-term reliability and electrical safety are improved.

  The ventilation port 22A is provided on the bottom surface of the cavity 22 so as to also serve as a drain hole for draining water accumulated in the cavity 22, and the bottom surface of the cavity 22 as a whole becomes lower toward the ventilation port 22A. It has a gradient. Therefore, as shown in FIG. 4, in the base portion 16 on which the gantry 10 is installed, the column support portion 16 a (see also FIG. 3) that supports the column 11 of the gantry 10 has the column 11 of the gantry 10 as the base portion 16. In order to enable anchor bolts 11a to be fixed, it is raised higher than the other parts, but the upper surface of the column support portion 16a is also given an appropriate gradient on the upper surface of the column support portion 16a. Even when water accumulates, the water can be guided to the ventilation port 22A.

  Moreover, in this solar power generation device, since it is necessary to attach the solar power generation panel 2 from the upper side with respect to the mount frame 10, when sticking each solar power generation panel 2 as shown to FIG. 2 (A). Starting from one end of the lowest row 5D, the photovoltaic power generation panels 2 are sequentially attached toward the other end of the same row 5D, and the photovoltaic power generation panels 2 are sequentially attached from the lowest row 5D to the highest row 5A. It is configured so that it can be installed and escaped. In addition, the photovoltaic power generation panel 2A indicated by a cross in FIG. 2A is a removable dummy panel provided in the highest row 5A, and this inspection can be performed by removing this dummy panel 2A during inspection. A mouth is formed, from which an operator can enter the lower side of each photovoltaic power generation panel 2 and perform inspection work and the like.

  Moreover, this solar power generation device and the artificial pond 1 are installed on the roof of a building, and specifically, the foundation part 16 (refer FIG. 4) in which the mount frame 10 is installed was provided on the roof of the building. It is made of presser concrete (waterproof protective concrete) that protects the waterproof layer 23. By providing the solar power generation device on the roof of the building in this way, not only can the amount of sunlight incident on the solar power generation device and the incident time be easily increased, but also the artificial pond 1 is provided on the roof of the building. Thus, it is possible to expect the effect of reducing the indoor heat load associated with the watering of the roof and the effect of the cool breeze effect on the leeward residential area.

  In addition, this invention is not limited to said embodiment at all, Of course, it can change and implement variously in the range which does not deviate from the summary of this invention. For example, the following modifications can be given.

  In the above embodiment, the water supply means for supplying water onto the light receiving surface is provided so that the entire light receiving surface of the photovoltaic power generation panel 2 is in contact with the flowing water. The surface may be configured to be in contact with water, or may be configured such that only a part of the light receiving surface is in contact with running water or still water. Moreover, you may immerse the photovoltaic power generation panel 2 in water so that a light-receiving surface may be located in water without providing a water supply means.

  Moreover, the photovoltaic power generation panel 2 is not limited to the artificial pond 1 and may be installed in an environment where water is received such as a natural pond, a river, a sea, a lake, a pool, and the like. And when installing the solar power generation panel 2 in a pool, it can install as a member which comprises the bottom face of a pool tank, etc., for example.

  In the said embodiment, although the solar power generation panel 2 is provided on the rooftop of a building, it is not restricted to this, You may be provided on the ground etc.

  In the said embodiment, as shown in FIG. 1, although the solar power generation panel 2 is distribute | arranged to step shape, you may distribute | arrange not only to this but for example, planar shape. Moreover, in the said embodiment, as shown to FIG. 2 (A), although the solar power generation panel 2 is distribute | arranged by the planar view matrix shape, it may not be restricted to this, For example, you may arrange | position in zigzag form. .

  In the above embodiment, the ventilation port 22A shown in FIG. 4 is also used as the drainage hole. However, the present invention is not limited to this, and the ventilation port for the cavity 22 and the drainage hole may be provided separately. The ventilation port can be provided at a position higher than the bottom surface of the cavity 22.

  In the above embodiment, when a part of the photovoltaic power generation panel 2 is used as the dummy panel 2A, the dummy panel 2 is provided only in the highest row 5A as shown in FIG. Instead, the dummy panels 2A may be provided in the other columns 5B to 5D, or the dummy panels 2A may not be provided if unnecessary.

  Needless to say, the above modifications may be combined as appropriate.

DESCRIPTION OF SYMBOLS 1 Artificial pond 1a Outer wall 2 Solar power generation panel 2A Dummy panel 3 Wood deck 4 Ingress prevention fence 5 Row 5A Highest row 5B Second highest row 5C Third highest row 5D Lowest row 6 Side groove 7 Lid 8 Gap 9A Guard 9B Spacer 10 Base 11 Post 11a Anchor bolt 12 Vertical connecting member 12a Through hole 13 Horizontal connecting member 14 Fixing member 15 Fastener 16 Base 16a Post support portion 17 Mounting member 18 Fixing member 19 Fastening member 20 Holding portion 21 Caulking material 22 Cavity 22A Ventilation port 23 Waterproof layer

Claims (4)

  Water supply means for supplying water onto the light receiving surface is provided so that at least a part of the light receiving surface of the photovoltaic power generation panel is in contact with running water or still water, or the light receiving surface is located in water. A solar power generation device characterized in that   The solar power generation device according to claim 1, wherein a cavity is formed on a lower surface side of the solar power generation panel.   The solar power generation device according to claim 1, wherein the light receiving surface has a gradient. The light receiving surface has a gradient so that water supplied on the light receiving surface by the water supply means flows on the light receiving surface;
A plurality of the photovoltaic panels are arranged in the direction in which the water flows, and a step in which the photovoltaic panel on the downstream side is lowered is provided between the two photovoltaic panels that are continuous in the direction in which the water flows. The solar power generation device as described in any one of Claims 1-3.

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