JP2011172540A - Method for setting solar battery module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for setting a solar battery module by which reveling cost is reduced, and reduction in electric power generation associated with the rise in temperature of the solar battery module is inhibited. <P>SOLUTION: The method for setting a solar battery module comprises planting creeping ground-cover plant such as Arctotheca calendula, Ajuga reptans, Phyla nodiflora, comfrey, Dichondra, hairy vetch or Verbena hybrida, which grows quickly in a shaded area, so as to cover the ground surface with the ground-cover plant, and setting the solar battery module on the ground surface where the ground-cover plant are planted. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for installing a solar cell module.

  There are various forms of solar cells. Typical examples include crystalline silicon solar cells, polycrystalline silicon solar cells, thin film crystal solar cells, microcrystalline silicon solar cells, amorphous silicon solar cells, and copper indium selenide solar cells. Compound semiconductor solar cells and the like are known.

  A general solar cell module is installed on a metal mount. In the case of this installation form, generally the ground is leveled, the surface layer (the ground surface) of the ground is paved with asphalt or concrete, and the base of the gantry is placed thereon to form a metal gantry. A solar cell module is fixed on a frame.

  It is known that when a solar cell module generates power by entering sunlight, the temperature of the solar cell (photovoltaic element) in the solar cell module rises due to incident sunlight (for example, a patent) Reference 1). Thus, when the temperature of the solar cell rises, the amount of power generation decreases. Therefore, Patent Document 2 proposes that a support block is provided between the building and the solar cell panel to form a ventilation space in order to suppress the temperature rise of the solar cell panel.

  However, although a certain effect can be obtained by cooling by ventilation, the effect is not sufficient when there is no wind and the amount of solar radiation is large and the reflection is strong.

  On the other hand, if asphalt pavement or concrete pavement is not used on the ground surface, weeds grow on the ground surface, and if left as it is, the weeds cover the surface of the solar cell panel that becomes the light-receiving surface of the solar cell module, so the output is increased. The problem of degradation occurs. Therefore, Patent Document 3 proposes that a rubber sheet for grass protection is formed on the ground surface and a gantry is disposed on the rubber sheet.

  However, the method of forming the rubber sheet for grass protection can reduce the leveling cost for installing the solar cell module as compared with asphalt pavement and concrete pavement, but the base is fixed on the rubber sheet for grass protection. The construction work is complicated. In addition, since the fastener penetrates the rubber sheet for grass protection, when the frame is placed on the rubber sheet for grass protection, the rubber sheet for grass protection may break. There is a problem that weeds grow from tearing.

JP 2002-170974 A JP-A-11-270049 JP 2000-332285 A

  Therefore, the subject of this invention is providing the installation method of the solar cell module which can reduce the leveling cost and can suppress the fall of the electric power generation amount with the temperature rise of a solar cell module.

  In order to solve the above-mentioned problems, the solar cell module installation method of the present invention is a method of installing a coated plant on the ground on which the solar cell module is installed or on the ground on which the solar cell module is to be installed. The solar cell module is installed on the ground on which the covered plant is planted. Thereby, the reflection from the ground surface can be suppressed and radiant heat can be lowered.

  In the installation method of the solar cell module of the present invention, the covered plant may be a plant that can grow on a cheek stalk or an underground stem. In addition, the covered plants are buckwheat, comfrey, arctoseca, hairy vetch, potentilla, shiba, perennial verbena, daikandra, hedera helix, silane, giboshi, ajuga, cog masa, vincaminol, swabbuck, beargrass, yaburan, yukinoshita, ramium, matsubaiku And at least one kind of plant selected from Iwadaresou.

  Moreover, as a covering plant, it uses two kinds of an early covering formation plant and a stable covering formation plant together, and after planting the early covering formation plant which forms an early covering with respect to the ground, or simultaneously with planting, it is against the ground. Planting or sowing seedlings or seeds of a stable coating-forming plant that forms a stable coating with an early coating-forming plant, and a solar cell module may be installed on the ground on which these coated plants are planted . Thereby, weed control effect can be maintained for a long time.

According to the method for installing a solar cell module of the present invention, it is possible to suppress the radiant heat due to the reflection of the ground on which the solar cell module is installed, so that it is possible to suppress a decrease in power generation efficiency due to a temperature rise of the solar panel. Furthermore, it is possible to suppress the growth of weeds around the solar cell module. Since only plants are planted, the leveling method is easy. Moreover, the planted plant does not grow until the surface of the solar cell panel is covered, and the power generation amount of the solar cell due to a decrease in the amount of received light (covering the light receiving surface) does not decrease.
Moreover, since the space in which the solar cell module is not installed can be used effectively, the energy density obtained per unit land can be increased if plants grown in the space are used as biomass fuel.

It is the schematic of the example which installed the solar cell module on the ground which planted the covering plant. It is the schematic of the example which installed the solar cell module and the wind power generator on the ground which planted the covering plant.

  FIG. 1 is a schematic view showing an example of a method for installing a solar cell module of the present invention. In FIG. 1, 1 is a solar cell module, 2 is a solar cell module mount, 3 is a covering plant, and 4 is the ground. When installing the solar cell module 1, the solar cell module mount 2 is installed on the ground 4, and the solar cell module is installed on the mount.

  As shown in FIG. 1, the coated plant planted on the ground on which the solar cell module is installed generally has a large coating speed on the ground, and its elongation is lower than the lower end of the solar cell panel, and at most 30 cm to 100 cm. Since the solar cell module is installed on the solar cell module mount, its lower end is usually installed at a height of about 0.5 m to 1.2 m from the ground. It does not cover the surface of the module. In addition, the plant near the lower end of the passage and the panel plant the plant of the above-mentioned plant height, but if the panel is connected and large like a mega solar, about the part directly under the panel, unless it protrudes from the solar panel surface, Plants with a height of 1m or more can be planted. In addition, about the planting plant of a channel | path, considering the convenience, such as equipment inspection, it is preferable that it is hard to slip and can endure a treading pressure.

  Various types of coated plants and planting methods are known. In the solar cell module installation method of the present invention, the coated plant has a high coating rate on the ground. Therefore, by simply planting the coated plant, the effect of suppressing the growth of weeds and the reflection from the ground can be prevented. There is an effect of preventing a decrease in the power generation amount of the battery module.

  The covered plant may be any plant that can cover the ground surface and suppress reflection, but preferred plants are Comfrey, Arctoca, Potentilla, Giboshi, Tsukibuki, Vincaminol, Fuchsou, Hedera helix, Yablanc, Yukinoshita, Silane And at least one plant selected from buckwheat, hairy vetch, shiba, perennial verbena, daikandra, ajuga, cog masa, beargrass, ramium, pineapple, and rockhopper. Each of these plants is characterized by a high coating speed on the ground surface or excellent coating stability described later. In particular, fluffy plants and vine plants have a high coating speed and good coating stability. When planting a coated plant, each may be used alone or in combination, and the planting time may be planted at the same time or according to the appropriate time.

Many of the above-mentioned covered plants lose their stock after one year, two years, or two to three years. Examples of annual grasses and biennial grasses include buckwheat, hairy vetch, and portulaca. Examples of plants whose strains decline in 2 to 3 years include arctoca, bird's foot trefoil, and ajuga. In addition, examples of plants whose stocks have not declined for several years include, for example, Comfrey, Rhino Beard, Silane, Shiva, Perennial Verbena, Giboshi, Shibazakura, Cotoneaster, Kittijou, Hedera Helix, Higanbana, Oxalis, Shukaido, Daikandra, Tsuwabuki, Narukoyuri , Fukusou, Baregrass, Yabukouji, Yablanc, Yukinoshita, Sasa and Azalea, Potentilla, Ibusuki Sou, creeping time, pine bug, clover, Iwadareso and the like.
In addition, Arctoseca, Ajuga, Iwadaresou, Hosta, Sasa, Comfrey, Shibazakura, Silane, Daikandra, Azalea, Shiba, Matsuba, Verbena, Yabukouji, Yaburan, Yukinoshita, Ramium, Ryuhige, etc. The risk of weeding is reduced by covering the boundary of the site with fences of several tens of centimeters above ground and 50 centimeters above ground. On the other hand, tsuwabuki and shuukaidou, which have long seed scattering distances, may be weeded, so care must be taken when there are farmers in the vicinity.

  Comfrey can withstand even the lowest ground temperature of about -25 degrees, especially in cold areas. The hairy vetch can have a minimum ground temperature of -20 degrees, but the covering effect is higher in warm areas. Arctica grows so that dandelion-shaped leaves cover the ground surface, grows vigorously, and can maintain the cover for 2 to 3 years in warm areas, but after that, the stock may decline. Yes, you cannot overwinter in cold regions. For warm grass, St. Augustine grass, Nosyba, June grass, Asamoe, etc. are suitable, and in cold regions, centipede grass and tifbrea, which is a variety of centipede grass modified for cold regions, are suitable. Pine bugs and daikandra are suitable for warmer areas because they cannot overwinter in the coldest areas. Ajuga, Hosta, Sasa, Shukaido, Yabukouji, Yukinoshita, and Lamium are resistant to cold and heat, but are not suitable for dry land because they are vulnerable to drying. In terms of strong stocks, buckwheat, comfrey, rhododendron, hairy vetch, arctoseca, potentilla, shiba, perennial verbena, gypsophila, swab, binkaminol, burdock, hedera helix, yaburan, yukinoshita, matsubaiku and ajuga are suitable. In addition, since Hedera helix also has a swell property, depending on the shape of the platform of the solar cell module, the surface of the module may be covered, so care must be taken.

  As the above-mentioned covered plant, after planting, the growth in a few months to one year is fast, the covering speed to the ground surface is large, and when seeding 200 grains in a 60 cm × 20 cm × 20 cm planter, or 9 cm pot seedling 4 When a plant is planted, it is preferable to first plant a plant having a coverage of 80% or more on the ground surface within one year. In the present invention, such a plant forms a coating on the ground at an early stage, and is therefore referred to as an “early coating-forming plant”. Here, the “coverage” is a ratio of the plant covering the ground when the planted plant is observed from a direction perpendicular to the ground (medium), and can be measured by visual observation or image analysis. it can.

  In practical use, solar cell modules are installed in consideration of the efficiency of sunlight irradiation on the panel surface and the amount of power generated per installed land area, so the place where the plant is planted is hidden behind the solar cell module. It's easy to get in the shade. Therefore, among these plants, the most preferred of these plants are the perennial plants that grow quickly in the shade, Comfrey, Arctoca, Potentilla, Hosta, Azalea, Vincaminol, Fuchso, Hedera helix, Yablanc, Yukinoshita and Silane.

  In general, covered plants are considered to grow fast and absorb water, nutrients and light in preference to others, or suppress the growth of other plants by releasing allelopathic substances. The covered plant in the present invention may be a plant that does not release an allelopathic substance such as Arctoseca or a plant that releases an allelopathic substance such as hairy vetch, as long as it has a high coverage on the ground. Several test methods for testing whether a plant to be planted is a plant that releases an allelopathic substance (that is, whether it has allelopathic activity) are known. As methods for identifying and proving allelopathic activity in fields and glass rooms, addition cultivation method, replacement cultivation method, staircase cultivation method, continuous root leachate collection method, and shadowless day length cultivation method are known. Since the method is difficult to distinguish from other competitions such as light and nutrients, a great deal of labor is required. Laboratory-scale methods include germination and growth tests using plant extracts, sandwich method to detect leaching from leaves, plant box method to detect exudate from roots, dish to detect volatile substances There is a pack method. The plant box method is suitable as a means for selecting a coated plant because it can be easily tested on a laboratory scale and has a good correlation with suppression of growth of weeds.

  In the installation method of the solar cell module of the present invention, after planting an early coating-forming plant that forms an early coating on the ground, using two types of an early coating-forming plant and a stable coating-forming plant as a coating plant. Or at the same time as planting, seedlings or seeds of a stable coating-forming plant that forms a stable coating on the ground are mixed with the early coating-forming plant, planted or sown, and on the ground on which these plants are planted A solar cell module may be installed. Thereby, even if the strain | stump | stock of an early covering formation plant declines, since a stable covering formation plant coat | covers the ground stably, a covering can be hold | maintained for a long term and weed growth can also be suppressed.

  The above stable coating-forming plants generally have a slow initial growth and form a stable coating several years after planting (3-5 years). Once the coating is formed, the coating can be stably maintained, so that the weed control effect is high. In addition, when a stable covering formation plant is a plant which releases an allelopathic substance, it is desirable that it is a plant which has tolerance with respect to this allelopathic substance.

  Examples of the above-mentioned stable coating-forming plants include those having early growth, such as Comfrey and Potentilla, and those having relatively low initial growth, such as Shibazakura, Shiba, Kitagawa, Silane, Hedera helix, Oxalis depay. , Violet, lily of the valley and the like, and examples of the slow initial growth include rhododendron, beetle, Cotoneaster, Japanese daffodil, azalea and the like. Examples of the shiva include centipede glass (original species), centipede glass (tifbrea), and centaugustin glass.

  Considering planting or sowing in combination with the above-mentioned early cover-forming plants, the growth rate is not so fast, Shiba, Shibazakura, Silane, Cotoneaster, Kitajosou, Ryunohige, Higanbana, Oxalis, Sasa and Azalea Kind is suitable. In addition, Comfrey and silane are suitable considering that they grow quickly even in the shade.

  Next, the installation method of a solar cell module is demonstrated. As described above, a fixing member such as a nail, a pin, or a staple is hit with a hammer or a tucker on a ground planted or sown with a covered plant, or an early-covered plant and a stable coated-formed plant. Is fixed on the ground. Alternatively, the ground surface can be covered with a covered plant by planting or seeding a covered plant, or an early-covering plant and a stable covering-forming plant on the ground on which the solar cell module is installed by the above method.

  After installing the solar cell modules, the solar cell modules are electrically connected. The photovoltaic element used in the solar cell module is not particularly limited. For example, a crystalline silicon solar cell, a polycrystalline silicon solar cell, a thin film crystal solar cell, a microcrystalline silicon solar cell, an amorphous silicon solar cell, a copper indium selenide solar cell. And compound semiconductor solar cells.

  In the solar cell module installation method of the present invention, in addition to installing the solar cell module on the ground on which the coated plant is planted, it is also optional to install a wind power generator 5 or the like as shown in FIG.

  Hereinafter, the plant growth situation on the ground where the solar cell module is installed and on which the coated plant is planted will be specifically described with reference to examples. However, the present invention is not limited only to the following examples.

(Example)
The measurement of the plant growth situation was carried out as follows. The planting test site was a plain or slope in Nagano Prefecture (altitude 660 m). Control with a herbicide was performed only once before planting. A 1 m ² test section was partitioned by a 1 m wide passage, and 1 to 3 repetitions (sections) were basically used for one test. The plants were as shown in Table 1. The amount of seeding and the number of transplants in each section were overcrowded to simulate the completion of coating several years later, and 64 strains or 20 g / m ^{2 of} seeds were used. Planting was carried out in the spring, and weed cutting survey was conducted on the 36th, 47th, 90th, and 139th days after planting. The cutting method for each ward is to cut only the above-ground part of all weeds in one section (1m x 1m) with a sickle and put it in a paper bag (Daisho Summit Bag No. 25), Then, these were further dried by ventilation at 60 ° C., and the dry weight was measured. The total dry weight of weeds throughout the test period (average value of total dry weight in the case of multiple plots) was determined.

(Comparative example)
A control group of 3 repetitions (compartment) was provided with respect to Example 1, the total dry weight of weeds was measured in the same manner as in Example 1, and the average value was obtained.
In addition, weed type and plant height (number in parentheses) at this time are Aki larch (130cm), Akinonogeshi (95cm), American Sendangsa (135cm), Gramineae weed (~ 160cm), Enocologosa (125cm), Enotera (~ 10cm) ), Giant Plover (130 cm), Psyllium, Oobakutakusa (200-300 cm), Anemonefish (130 cm), Jerusalem artichoke (250-280 cm), Asteraceae weeds, Giant Enokoro (95 cm), Kusafuji (-90 cm), Kozorina (130 cm), Shiroza ( 190cm), Japanese pampas grass (170cm), Teddyceae (up to 160cm), Dandelion (up to 20cm), Japanese cypress (up to 10cm), Togechisha (140cm), Himejoon (120cm), Japanese cypress (30cm), Japanese clover (55cm), Japanese cypress (100cm) ), Evening primrose (135 cm), mugwort (85 cm), and so on.

The weed inhibitory power was evaluated according to the following criteria according to the total dry weight of weeds obtained by the above method.
[Weed inhibiting power] A: Total dry weight of 50 g or less
○: 51-100g
Δ: 101-150g
×: 151-200g
Xx: 250g or more

Moreover, the early covering property and covering stability of the planted plant were evaluated according to the following criteria. The coverage was evaluated visually.
[Early coverage] A: Coverage of 80% or more
○: 60-79%
Δ: 40-59%
×: 39% or less

[Coating stability] Coverage 1 and 2 years after planting
A: Coverage of 70% or more
○: 50-69%
Δ: 30-49%
×: 29% or less

  From the results in Table 1, it can be seen that the amount of weeds that grew during about three and a half months by planting the coated plant is clearly less than when not planting.

  When multiple species are mixed and planted, only the one with the highest plant height is mowed every year, and the harvested covered plants and the weeds weeded are used as biomass fuel for biomass power generation to increase the energy density obtained per unit land. be able to.

  According to the installation method of the solar cell module of the present invention, it is possible to reduce the cost required for leveling the installation site, and it is possible to prevent the reflection by the planted plant and suppress the temperature rise of the solar cell panel. Therefore, it can be used for installing solar cell modules in residential areas, mountainous areas, industrial areas, and the like.

DESCRIPTION OF SYMBOLS 1 Solar cell module 2 Solar cell module mount 3 Coated plant 4 Ground 5 Wind power generator

Claims (7)

  The ground surface is covered with a covered plant by planting a coated plant on the ground on which the solar cell module is installed or the ground on which the solar cell module is to be installed, and the solar cell module is installed on the ground on which the coated plant is planted. A method for installing a solar cell module.   The method for installing a solar cell module according to claim 1, wherein the covered plant is a plant capable of growing on a cheek stalk or an underground stem.   Covering plants are Comfrey, Arctoseca, Potentilla, Hosta, Swab, Vincaminol, Fuchsaw, Hedera helix, Yablanc, Yukinoshita, Silane, Buckwheat, Hairy vetch, Shiva, Perennial verbena, Daikandra, Ajuga, Cogazasa, Beargrass, Lamium, Pine The method for installing a solar cell module according to claim 1, wherein the solar cell module is at least one kind of plant selected from Iwadaresou. As a covering plant, two kinds of early covering formation plant and stable covering formation plant are used together,
After planting an early cover-forming plant that forms an early cover on the ground or simultaneously with planting, seedlings or seeds of a stable cover-forming plant that forms a stable cover on the ground are mixed with the early cover-forming plant. The solar cell module installation method according to any one of claims 1 to 3, wherein the solar cell module is installed on the ground planted or seeded and planted with these coated plants.   The method for installing a solar cell module according to claim 4, wherein the early coating-forming plant is at least one plant selected from buckwheat, comfrey, arctoseca, ajuga, iwadareso, daikandra, hairy vetch, and perennial verbena.   Stable cover-forming plants are Comfrey, Rhinoceros, Shiva, Shibazakura, Cotoneaster, Kitajosou, Hedera Helix, Aegypti, Oxalis, Silane, Giboshi, Iwadaresou, Shuukaidou, Daikandora, Tsuwabuki, Narukoyuri, Fukusou, Bare grass, Yabuya 6. The solar cell module installation method according to claim 4 or 5, wherein the solar cell module is at least one plant selected from the group consisting of Yukinoshita, Sasa and Azalea.   The installation method of the solar cell module according to any one of claims 1 to 6, wherein the coated plant is used as a biomass fuel.

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