JP2017158228A - Object cleaning method and solar panel cleaning method - Google Patents

Object cleaning method and solar panel cleaning method Download PDF

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JP2017158228A
JP2017158228A JP2016037009A JP2016037009A JP2017158228A JP 2017158228 A JP2017158228 A JP 2017158228A JP 2016037009 A JP2016037009 A JP 2016037009A JP 2016037009 A JP2016037009 A JP 2016037009A JP 2017158228 A JP2017158228 A JP 2017158228A
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solar panel
cleaning
water
cleaning method
dirt
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JP6583056B2 (en
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民男 松澤
Tamio Matsuzawa
民男 松澤
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E-PLAN Ltd
Grudio Co Ltd
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Grudio Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

PROBLEM TO BE SOLVED: To provide an object cleaning method and a solar panel cleaning method each of which can provide cleaning effect substantially equal to a conventional cleaning method with less cleaning water in comparison with the conventional cleaning method, and does not impair a solar panel surface or does not cause other damage to it and enables cleaning water after used for cleaning to be discharged as wastewater without performing any treatment on the wastewater, and is economical and natural environment-friendly.SOLUTION: The object cleaning method is provided in which bubble-containing cleaning water is sprayed to an object surface, dirt adhered to the object surface is made to be adsorbed on the bubble-containing cleaning water and to leave the surface, the bubble-containing cleaning water containing the dirt that is made to leave the surface is removed from the object surface, the object is thereby cleaned. The solar panel cleaning method is provided in which bubble-containing cleaning water is sprayed to a solar panel surface, dirt adhered to the solar panel surface is made to leave the surface, and the bubble-containing cleaning water containing the dirt that is made to leave the surface is removed from the solar panel surface, the solar panel is thereby cleaned.SELECTED DRAWING: Figure 1

Description

本発明は、物体の洗浄方法に関し、より詳しくは、屋外に設置された既設の太陽光パネルの表面を洗浄する太陽光パネル洗浄方法に関するものである。   The present invention relates to an object cleaning method, and more particularly to a solar panel cleaning method for cleaning the surface of an existing solar panel installed outdoors.

再生可能エネルギーの一つとして太陽光発電が注目されている。太陽光発電に用いられる太陽光パネルは平地や屋根の上などの屋外に野晒しの状態で設置されるため、その表面には、花粉や鳥の糞、落ち葉、黄砂、PM2.5等(本願において、これらをまとめて「汚れ」という)が付着する。太陽光パネルの受光面に汚れが付着すると、取り込まれる光の量が減少して発電量が低下することから、これを回避するためには定期的に太陽光パネルの表面を洗浄する必要がある。   Solar power generation is attracting attention as one of the renewable energies. Solar panels used for photovoltaic power generation are installed outdoors on flat ground or on the roof, so the surface has pollen, bird droppings, fallen leaves, yellow sand, PM2.5, etc. (this application) These are collectively referred to as “dirt”). If dirt adheres to the light receiving surface of the solar panel, the amount of light taken in will decrease and the amount of power generation will decrease, so it is necessary to periodically clean the surface of the solar panel to avoid this .

従来、太陽光パネルの表面は、高圧洗浄機によって洗浄液を高圧噴射して洗浄する方法や、ブラシやポリッシャーで研磨する方法等によって洗浄されていた(例えば、特許文献1〜3等)。これらの方法では、化学洗剤(界面活性剤)を用いて太陽光パネル表面の汚れを取り除いたのち、汚れを含む化学洗剤を水で洗い流し、太陽光パネル表面に残った水を拭き取ることによって洗浄が行われる。   Conventionally, the surface of a solar panel has been cleaned by a method of cleaning by spraying a cleaning liquid with a high-pressure cleaner, a method of polishing with a brush or a polisher, and the like (for example, Patent Documents 1 to 3). In these methods, cleaning is performed by removing dirt on the surface of the solar panel using a chemical detergent (surfactant), rinsing the chemical detergent containing the dirt with water, and wiping off the remaining water on the surface of the solar panel. Done.

特開2002−273351号公報JP 2002-273351 A 特開2016−016364号公報Japanese Patent Laid-Open No. 2006-016364 特開2015−138854号公報JP-A-2015-138854

太陽光パネルの表面は精密且つ繊細であるため、太陽光パネル表面に洗浄液を高圧噴射する方法ではセルが圧迫されて損傷することがあり、太陽光パネル表面をブラシやポリッシャーで研磨する方法では、太陽光パネル表面を削るなどして損傷することがある。太陽光パネル表面にコーティングが施されている場合には、高圧洗浄機での高圧洗浄やブラシ等での洗浄がコーティング剥離の一因となることもある。また、化学洗剤を用いる場合には、太陽光パネル表面にダメージを与えることがあるほか、太陽光パネル表面に残った化学洗剤によって発電効率が低下したり、化学洗剤の残留物によってアルミニウム(本願において「アルミ」という)製のフレームが腐食したりする等の弊害もある。このような事情から、洗浄に際して化学洗剤を使用することを禁止しているパネルメーカーもある。   Since the surface of the solar panel is precise and delicate, the method of spraying the cleaning liquid on the solar panel surface with high pressure may damage the cells by pressing, and the method of polishing the solar panel surface with a brush or polisher, It may be damaged by cutting the surface of the solar panel. When the solar panel surface is coated, high-pressure washing with a high-pressure washing machine or washing with a brush or the like may cause coating peeling. In addition, when a chemical detergent is used, the solar panel surface may be damaged, and the power generation efficiency is lowered by the chemical detergent remaining on the solar panel surface, or aluminum (in this application) There is also a harmful effect such as corrosion of a frame made of “aluminum”. For this reason, some panel manufacturers prohibit the use of chemical detergents for cleaning.

化学洗剤を用いる方法では、化学洗剤を洗い流すために大量の水が必要とされる。化学洗剤の洗い流しには水道水や井戸水が使用されるが、水道水や井戸水にはミネラルやカルキ、カルシウムなどが含まれており、これらの蓄積は発電効率の低下につながる。このような事情から、パネルメーカーの中には、水道水や井戸水を用いて洗浄をした場合には、保証がきかないと明記しているところもある。また、太陽光パネルの洗浄に使用される水の量は非常に多く、一般的な250Wの太陽光パネル4000枚(1MW分)を洗浄するのに、およそ40000Lの水が使用される。加えて、洗い流し後の拭き取り作業には多くの人員が必要であるため、太陽光パネルのオーナーは、水道代のほか多くの人件費を負担しなければならず、経済的な負担が大きい。   In the method using a chemical detergent, a large amount of water is required to wash away the chemical detergent. Tap water and well water are used to wash away chemical detergents, but tap water and well water contain minerals, chlorine, calcium, etc., and their accumulation leads to a decrease in power generation efficiency. For this reason, some panel manufacturers specify that there is no guarantee if they are washed with tap water or well water. Further, the amount of water used for cleaning the solar panels is very large, and about 40000 L of water is used to clean 4000 sheets of typical 250 W solar panels (for 1 MW). In addition, since many people are required for the wiping work after washing off, the owner of the solar panel has to bear a lot of labor costs in addition to the water bill, which is an economic burden.

さらに、水道水や井戸水を使用する洗浄方法では、水源や水道施設が必須であるが、太陽光パネルが設置される場所によっては水源や水道施設がない場合もある。この場合、水源として給水車を配備する必要があるが、給水車を配備するための費用や給水車を運転する運転手の人件費の分だけ一層負担が増加する。   Furthermore, in the cleaning method using tap water or well water, a water source and a water supply facility are essential, but depending on the place where the solar panel is installed, there may be no water source or water supply facility. In this case, it is necessary to deploy a water supply vehicle as a water source, but the burden further increases by the cost of deploying the water supply vehicle and the labor cost of the driver driving the water supply vehicle.

また、産業排水にはCOD(化学的酸素要求量)やBOD(生物化学的酸素要求量)、pH(水素イオン濃度)、SS(浮遊物質)、ノルマルヘキサン(油分)等の項目に関する排出基準が設けられ、基準値を上回る排水はそのままでは排出することができない。河川等を汚染する最大の原因であるCODは、界面活性剤を含有するか否かが影響するため、化学洗剤を用いる場合には、排水が基準値を下回るような処理をしなければならず、この処理にも多大なコストがかかる。   Industrial wastewater has emission standards for items such as COD (chemical oxygen demand), BOD (biochemical oxygen demand), pH (hydrogen ion concentration), SS (floating matter), and normal hexane (oil). Wastewater that is provided and exceeds the standard value cannot be discharged as it is. COD, which is the biggest cause of polluting rivers and the like, affects whether or not it contains a surfactant. Therefore, when using chemical detergents, wastewater must be treated below the standard value. This processing is also very expensive.

本発明の解決課題は、従来の洗浄方法に比して少量の洗浄水で従来方法と同程度の洗浄効果を得ることができ、太陽光パネル表面に損傷やその他のダメージを与えることがなく、洗浄後の洗浄水を何ら処理することなく排出することができる、経済的かつ自然環境に優しい物体洗浄方法と太陽光パネル洗浄方法を提供することにある。   The problem to be solved by the present invention is that a cleaning effect comparable to that of the conventional method can be obtained with a small amount of cleaning water as compared with the conventional cleaning method, without causing damage or other damage to the solar panel surface, An object of the present invention is to provide an economical and natural environment-friendly object cleaning method and solar panel cleaning method capable of discharging the cleaning water after cleaning without any treatment.

本発明の物体洗浄方法及び太陽光パネル洗浄方法は、物体(太陽光パネル)の表面にマイクロバブル若しくはナノバブル又はこれらよりも細かいバブルを含有した洗浄水を噴霧して、当該物体(太陽光パネル)の表面に付着した汚れを前記洗浄水で吸着して浮き上がらせ、その汚れを含む泡含有洗浄水を物体(太陽光パネル)の表面から除去することによって物体(太陽光パネル)を洗浄する方法である。   The object cleaning method and solar panel cleaning method of the present invention sprays cleaning water containing microbubbles, nanobubbles or bubbles finer than these on the surface of the object (solar panel), and the object (solar panel) In the method of cleaning an object (solar panel) by adsorbing and adhering dirt adhering to the surface of the water from the surface of the object (solar panel) by removing the foam-containing cleaning water containing the dirt from the surface of the object (solar panel) is there.

本発明の物体洗浄方法及び太陽光パネル洗浄方法は、次の効果を奏する。
(1)化学洗剤を使用しないため、化学洗剤による物体(太陽光パネル)表面にダメージを与えることがない。
(2)界面活性剤を含まない洗浄水を用いる(化学洗剤を使用しない)ため、何ら処理をしなくともCODの値が排出基準を下回り、洗浄後の汚れを含む洗浄水をそのまま排出しても、自然環境を害することがない。
(3)化学洗剤を洗い流す必要がないため、洗浄に使用する水量を大幅に減らすことができる。例えば、従来およそ40000Lの水を使用していたような事例でされていたような太陽光パネルの洗浄を500L程度の水量で行うことができる。
(4)化学洗剤を洗い流す必要がないため、水道施設がないところでも洗浄を行うことができる。また、水道施設がない場合でも、給水車を配備する必要がないため、洗浄に要するコストを大幅に削減することができる。
(5)ブラシやポリッシャーを使用しないため、物体(太陽光パネル)の損傷やコーティングの劣化が生じにくい。
(6)汚れや油等に吸着する性質を有する極微細泡を含有した洗浄水を使用するため、物体(太陽光パネル)表面を確実に洗浄することができる。
The object cleaning method and solar panel cleaning method of the present invention have the following effects.
(1) Since no chemical detergent is used, the surface of the object (solar panel) due to the chemical detergent is not damaged.
(2) Since washing water that does not contain a surfactant is used (no chemical detergent is used), the COD value falls below the discharge standard without any treatment, and the washing water containing dirt after washing is discharged as it is. Even without harming the natural environment.
(3) Since it is not necessary to wash away the chemical detergent, the amount of water used for cleaning can be greatly reduced. For example, the solar panel can be washed with a water amount of about 500 L, which has been conventionally used in a case where about 40,000 L of water has been used.
(4) Since it is not necessary to wash away the chemical detergent, it is possible to perform the washing even where there is no water supply facility. Even when there is no water supply facility, it is not necessary to install a water supply vehicle, so that the cost required for cleaning can be greatly reduced.
(5) Since no brush or polisher is used, the object (solar panel) is not easily damaged or the coating is not deteriorated.
(6) Since the cleaning water containing ultrafine bubbles having the property of adsorbing to dirt, oil, etc. is used, the surface of the object (solar panel) can be reliably cleaned.

(a)〜(c)は本発明の物体洗浄方法(太陽光パネル洗浄方法)の作用説明図。(A)-(c) is operation | movement explanatory drawing of the object cleaning method (solar panel cleaning method) of this invention.

(実施形態)
本発明の物体洗浄方法及び太陽光パネル洗浄方法(以下「洗浄方法」という)の実施形態の一例について説明する。この実施形態の洗浄方法は、太陽光パネルの表面にマイクロバブル若しくはナノバブル又はこれらよりも細かいバブル(本願において、マイクロバブルよりも細かいバブルを「極微細泡」という)を含有した洗浄水(本願において「泡含有洗浄水」という)を噴霧して、当該太陽光パネルの表面に付着した汚れを前記洗浄水で吸着して浮き上がらせ、その浮き上がらせた汚れを含む泡含有洗浄水を太陽光パネルの表面から除去することによって当該太陽光パネルを洗浄する方法である。なお、本願において、マイクロバブルとは直径がマイクロサイズの泡を、ナノバブルとは直径がナノサイズの泡をいう。また、太陽光パネルとは、必要枚配列した太陽電池素子(セル)を強化ガラスなどで保護してパッケージ化したいわゆるモジュールを意味するが、本願において、太陽光パネルの洗浄方法という場合には、単体の太陽光パネル(モジュール)の洗浄のみならず、モジュールを複数枚並べて接続したいわゆるアレイを洗浄する場合も含むものとする。
(Embodiment)
An example of an embodiment of the object cleaning method and solar panel cleaning method (hereinafter referred to as “cleaning method”) of the present invention will be described. The cleaning method of this embodiment is a cleaning water (in this application) containing microbubbles or nanobubbles or bubbles finer than these on the surface of the solar panel (in this application, bubbles finer than microbubbles are referred to as “ultrafine bubbles”). Spraying “foam-containing washing water”), the dirt adhering to the surface of the solar panel is adsorbed and lifted by the washing water, and the foam-containing washing water containing the raised dirt is removed from the solar panel. This is a method of cleaning the solar panel by removing it from the surface. In addition, in this application, a micro bubble means a bubble with a diameter of micro size, and a nano bubble means a bubble with a diameter of nano size. In addition, the solar panel means a so-called module in which the necessary solar cell elements (cells) arranged in a package are protected and packaged with tempered glass or the like, but in the present application, in the case of a solar panel cleaning method, This includes not only cleaning of a single solar panel (module) but also cleaning of a so-called array in which a plurality of modules are arranged and connected.

[泡含有洗浄水]
本発明の洗浄方法では、泡含有洗浄水として、例えば、極微細泡を含有したアルカリイオン水(本願において「泡含有アルカリイオン水」という)や極微細泡を含有した純水又は超純水(本願において、これらを「泡含有純水」という)等を用いることができる。泡含有アルカリイオン水は、pH8〜13.5程度とすることができるが、フレームや架台がアルミ製である場合、アルミに対してアタック性のないpH11以下とするのが好ましい。
[Foam-containing cleaning water]
In the cleaning method of the present invention, as the foam-containing cleaning water, for example, alkali ion water containing ultrafine bubbles (referred to as “foam-containing alkali ion water” in the present application), pure water or ultrapure water containing ultrafine bubbles ( In the present application, these may be referred to as “foam-containing pure water”). The bubble-containing alkaline ionized water can have a pH of about 8 to 13.5. However, when the frame or the frame is made of aluminum, the pH is preferably 11 or less, which is not attackable with respect to aluminum.

一般に、pH11以下のアルカリイオン水は、pH12やpH13のアルカリイオン水に比べて洗浄力が劣るが、本発明では、アルカリイオン水に極微細泡を含有させることによって、pH12やpH13の強アルカリイオン水と同等の洗浄力を発揮できるようにしてある。   In general, alkaline ionized water having a pH of 11 or less is inferior in detergency compared with alkaline ionized water having a pH of 12 or 13, but in the present invention, strong alkaline ions having a pH of 12 or 13 are obtained by adding ultrafine bubbles to the alkaline ionized water. Detergency equivalent to water can be demonstrated.

泡含有アルカリイオン水は、例えば、pH12〜13.5程度のアルカリイオン水と、泡含有純水とを用意し、両者を所定分量ずつ混合することによって生成したり、極微細泡を含有させたpH12〜13.5程度のアルカリイオン水と、純水又は超純水を所定分量ずつ混合して生成したりすることができる。なお、ここに示す泡含有アルカリイオン水の生成方法は一例であり、これ以外の方法で生成することもできる。   Foam-containing alkaline ionized water, for example, is prepared by preparing alkaline ionized water having a pH of about 12 to 13.5 and bubble-containing pure water, and mixing both in predetermined amounts, or containing ultrafine bubbles. Alkaline ion water having a pH of about 12 to 13.5 and pure water or ultrapure water can be mixed to produce a predetermined amount. In addition, the production | generation method of foam containing alkali ion water shown here is an example, and can also produce | generate by methods other than this.

なお、この実施形態では、泡含有洗浄水を用いて洗浄をする場合を一例としているが、場合によっては、極微細泡を含有しないpH8〜13.5程度のアルカリイオン水、好ましくはpH11以下のアルカリイオン水を洗浄水として用いることもできる。   In addition, in this embodiment, although the case where it wash | cleans using foam containing washing water is taken as an example, depending on the case, it is alkaline ion water of about pH 8-13.5 which does not contain ultrafine foam, Preferably it is pH 11 or less. Alkaline ion water can also be used as washing water.

[泡含有洗浄水の噴霧]
泡含有洗浄水は、既存の噴霧装置などで噴霧することができる。噴霧装置としては、例えば、株式会社工進の「エンジン噴霧器(型番:MS−ERH50TH85)」等を用いることができる。噴霧する液体の量は、太陽光パネルの汚れの程度や設置場所の環境(湿度や温度など)に応じて適宜調整することができるが、一例として250Wの太陽光パネルの場合は、一枚あたり80cc〜120cc程度の量を噴霧すれば十分な洗浄効果を得られる。噴霧する泡含有洗浄水は、超微霧や微霧、細霧等など、粒径の小さなものが好ましい。なお、超微霧や微霧、細霧の定義は諸説あるが、本願では、粒径10μm以下のものを超微霧と、超微霧よりも大きく且つ粒径100μm以下のものを微霧と、微霧よりも大きく且つ粒径300μm以下のものを細霧という。
[Foam-containing washing water spray]
The foam-containing washing water can be sprayed with an existing spraying device or the like. As the spray device, for example, “Engine sprayer (model number: MS-ERH50TH85)” manufactured by Koshin Co., Ltd. can be used. The amount of liquid to be sprayed can be adjusted as appropriate according to the degree of dirt on the solar panel and the environment (humidity, temperature, etc.) of the installation location. For example, in the case of a 250 W solar panel, If an amount of about 80 cc to 120 cc is sprayed, a sufficient cleaning effect can be obtained. The foam-containing washing water to be sprayed preferably has a small particle size such as ultra fine mist, fine mist, or fine mist. Although there are various theories on the definition of super fine mist, fine mist, and fine mist, in the present application, those having a particle size of 10 μm or less are super fine mists, and those having a particle size larger than the super fine mist and having a particle size of 100 μm or less are fine mists. A thing larger than a fine mist and having a particle size of 300 μm or less is called a fine mist.

泡含有洗浄水としてpH11以下の泡含有アルカリイオン水を用いる場合、アルミに対するアタック性がないため、太陽光パネル表面のアルミフレームに泡含有洗浄水がかかっても問題ない。このため、これら複数枚の太陽光パネルが連結されている(太陽光アレイとし設置されている)場合には、一連の流れの中で太陽光パネルの受光面(強化ガラスカバー)とアルミフレームとをまとめて洗浄することができる。このように連続的な洗浄が可能となることで、作業時間の大幅な低減が期待できる。   When foam-containing alkaline ionized water having a pH of 11 or less is used as the foam-containing washing water, there is no problem even if the foam-containing washing water is applied to the aluminum frame on the surface of the solar panel because there is no attack against aluminum. Therefore, when these multiple solar panels are connected (installed as a solar array), the light receiving surface (tempered glass cover) of the solar panel and the aluminum frame Can be washed together. Since continuous cleaning is possible in this way, a significant reduction in working time can be expected.

[泡含有洗浄水の除去]
泡含有洗浄水を噴霧して太陽光パネル表面の汚れを浮き上がらせた後、当該太陽光パネル表面の汚れを吸着した泡含有洗浄水をスキージーなどの除去手段によって太陽光パネル表面から除去する。汚れを含んだ泡含有洗浄水はスキージー以外の手段、例えば布などの拭き取り手段やスポンジなどの吸水手段等によって除去することができる。スキージーなどの除去手段での除去後に、布材やスポンジなどで残りの汚れや水分を除去するようにしてもよい。
[Removal of foam-containing washing water]
After the foam-containing cleaning water is sprayed to raise the dirt on the solar panel surface, the foam-containing cleaning water that has adsorbed the dirt on the solar panel surface is removed from the solar panel surface by a removing means such as a squeegee. Foam-containing washing water containing dirt can be removed by means other than a squeegee, for example, a wiping means such as cloth or a water absorbing means such as a sponge. After removal by a removing means such as a squeegee, the remaining dirt and moisture may be removed with a cloth material or sponge.

(作用)
本発明の作用について、図1(a)〜(c)を参照して説明する。ここでは、液体として超純水を用いて生成されたpH11の泡含有アルカリイオン水を用いる場合を一例として説明する。
(1)アルカリイオン水はクラスターが非常に細かいため、太陽光パネル表面に泡含有アルカリイオン水を噴霧すると、太陽光パネルとその表面に付着した汚れの間(界面)に泡含有アルカリイオン水が浸透する(図1(a))。アルカリイオン水には、イオンの効果によって汚れを包み込む界面活性効果があるため、界面に浸透した泡含有アルカリイオン水によって汚れが包み込まれる。また、泡含有アルカリイオン水中の極微細泡の表面張力によって、太陽光パネル表面の汚れが当該極微細泡の表面に吸着される。
(2)泡含有アルカリイオン水が太陽光パネルとその表面に付着した汚れの界面に浸透すると、太陽光パネル表面がマイナスに帯電し、泡含有アルカリイオン水と太陽光パネルが反発し、泡含有アルカリイオン水で包み込んだ汚れが太陽光パネルから剥離される(図1(b))。また、泡含有アルカリイオン水中の極微細砲が太陽光パネル表面に接触して圧壊すると、その衝撃によって太陽光パネル表面の汚れが当該太陽光パネルから剥離される。剥離された汚れは、泡含有アルカリイオン水によって乳化される(汚れが微粒子にされて泡含有アルカリイオン水に分散される)。
(3)太陽光パネル表面に付着した汚れを剥離して太陽光パネル表面に浮き上がらせた後、当該汚れを含む泡含有アルカリイオン水を太陽光パネル表面から除去することで、太陽光パネル表面が洗浄される(図1(c))。なお、pH11の泡含有アルカリイオン水は洗浄時に汚れと反応することでpH8以下となる。pH8以下の排水は産業排水の排出基準を下回る値であるため、別途処理をすることなく排出することができる。
(Function)
The effect | action of this invention is demonstrated with reference to Fig.1 (a)-(c). Here, the case where the bubble containing alkaline ionized water of pH11 produced | generated using the ultrapure water as a liquid is used is demonstrated as an example.
(1) Alkaline ion water has very fine clusters, so when spraying foam-containing alkali ion water on the solar panel surface, the foam-containing alkali ion water is between the solar panel and the dirt adhering to the surface (interface). It penetrates (FIG. 1 (a)). Since the alkaline ionized water has a surface active effect that encloses dirt by the effect of ions, the dirt is encased by the bubble-containing alkaline ionized water that has permeated the interface. Moreover, dirt on the surface of the solar panel is adsorbed on the surface of the ultrafine bubbles by the surface tension of the ultrafine bubbles in the bubble-containing alkaline ionized water.
(2) When the bubble-containing alkaline ionized water penetrates into the interface between the solar panel and the dirt adhering to the surface, the surface of the solar panel is negatively charged, and the bubble-containing alkaline ionized water and the solar panel are repelled. The dirt encased in the alkaline ionized water is peeled off from the solar panel (FIG. 1 (b)). In addition, when the ultrafine gun in the bubble-containing alkaline ionized water comes into contact with the solar panel surface and is crushed, dirt on the solar panel surface is peeled off from the solar panel by the impact. The peeled dirt is emulsified with foam-containing alkaline ionized water (the dirt is made into fine particles and dispersed in the foam-containing alkaline ionized water).
(3) After removing the dirt adhering to the surface of the solar panel and floating on the surface of the solar panel, the surface of the solar panel is removed by removing the bubble-containing alkaline ionized water containing the dirt from the surface of the solar panel. It is washed (FIG. 1 (c)). The pH-containing foam-containing alkaline ionized water becomes pH 8 or less by reacting with dirt during washing. Since wastewater with a pH of 8 or less is less than the discharge standard for industrial wastewater, it can be discharged without further treatment.

(試験例)
本件出願人は、本発明の洗浄方法について試験を行った。試験概要及び試験結果は次のとおりである。
(Test example)
The applicant has tested the cleaning method of the present invention. The test outline and test results are as follows.

[試験概要]
試験年月日:2015年6月9日〜10日
試験場所:栃木県栃木市
試験対象:設置後2年経過した太陽光パネル(株式会社Looop製の「Looop255W多結晶「型番:LP−255P−60H」)
使用機器等:
(1)発電量計測機器
発電量の計測には、新栄電子計測器株式会社製の「太陽光発電I−Vカーブトレーサ(型番:IVH−2000Z)」を用いた。
(2)噴霧装置
泡含有洗浄水の噴霧には、株式会社工進の「エンジン噴霧器(型番:MS−ERH50TH85)」を用いた。泡含有洗浄水は、約1020cc/分のペースで噴霧した。
(3)洗浄水
洗浄水には、pH11の泡含有アルカリイオン水を用いた。
試験方法:
(1)洗浄前の太陽光パネル(本願において「洗浄前パネル」という)の発電量計測
洗浄前に太陽光パネル1枚ずつコネクタを取り外し、当該太陽光パネルの発電量を計測した。この時、発電量を日射計とリンクさせて計測することによって日射量による影響を排除し、発電量の計測誤差が生じないようにした。
(2)太陽光パネルの洗浄
本発明の洗浄方法によって太陽光パネルを洗浄した。具体的には、噴霧装置で太陽光パネルの表面に泡含有アルカリイオン水を噴霧したのち、太陽光パネル表面の汚れを含んだ泡含有アルカリイオン水をスクレーパーで除去することによって、太陽光パネルを洗浄した。
(3)洗浄後の太陽光パネル(本願において「洗浄後パネル」という)の発電量計測
洗浄後、洗浄後パネルの発電量を計測した。洗浄前パネルの発電量の計測と同様、発電量は日射計とリンクさせて計測した。
(4)劣化率の劣化率の算出
前記(1)の計測によって得られた洗浄前パネルの発電量を株式会社Looop製のLP−255P−60Hの公式性能と比較して、洗浄前パネルの発電量の劣化率(本願において「洗浄前パネル劣化率」という)を算出した。同様に、前記(3)の計測によって得られた洗浄後パネルの発電量を前記LP−255P−60Hの公式性能と比較して、洗浄後パネルの発電量の劣化率(本願において「洗浄後パネル劣化率」という)を算出した。
(5)劣化率の比較による改善率の算出
前記(4)で算出された洗浄前パネル劣化率と洗浄後パネル劣化率を比較して、洗浄後パネルの発電量が洗浄前パネルの発電量と比べてどれだけ改善したかを表す改善率を算出した。
[Study Summary]
Test date: June 9-10, 2015 Test location: Tochigi City, Tochigi Prefecture Test target: Solar panel (Loop 255W polycrystal “Loop 255 manufactured by Loop Co., Ltd.” model number: LP-255P-) 60H ")
Equipment used:
(1) Electricity generation measuring device “Solar power generation IV curve tracer (model number: IVH-2000Z)” manufactured by Shinei Electronics Measuring Co., Ltd. was used for the measurement of electric power generation.
(2) Spraying device “Engine sprayer (model number: MS-ERH50TH85)” manufactured by Kojin Co., Ltd. was used for spraying foam-containing washing water. Foam-containing wash water was sprayed at a rate of about 1020 cc / min.
(3) Washing water Foam-containing alkaline ionized water having a pH of 11 was used as the washing water.
Test method:
(1) Measurement of power generation amount of solar panel before cleaning (referred to as “pre-cleaning panel” in the present application) The connectors were removed one by one before the cleaning, and the power generation amount of the solar panel was measured. At this time, the power generation amount was measured by linking it with a pyranometer to eliminate the influence of the solar radiation amount, so that the measurement error of the power generation amount did not occur.
(2) Cleaning of solar panels Solar panels were cleaned by the cleaning method of the present invention. Specifically, after spraying the foam-containing alkaline ionized water on the surface of the solar panel with a spray device, the foam-containing alkaline ionized water containing dirt on the surface of the solar panel is removed with a scraper. Washed.
(3) Measurement of power generation amount of solar panel after cleaning (referred to as “post-cleaning panel” in the present application) After cleaning, the power generation amount of the cleaned panel was measured. Similar to the measurement of the power generation amount of the panel before cleaning, the power generation amount was measured by linking with a pyranometer.
(4) Calculation of deterioration rate of deterioration rate Compared with the official performance of LP-255P-60H manufactured by Loop Co., Ltd., the power generation amount of the panel before cleaning obtained by the measurement of (1) above, The amount of deterioration rate (referred to as “pre-cleaning panel deterioration rate” in the present application) was calculated. Similarly, the power generation amount of the washed panel obtained by the measurement in (3) above is compared with the official performance of the LP-255P-60H. "Deterioration rate").
(5) Calculation of improvement rate by comparison of deterioration rate Comparing the panel deterioration rate before cleaning calculated in (4) with the panel deterioration rate after cleaning, the power generation amount of the panel after cleaning is the power generation amount of the panel before cleaning. The improvement rate indicating how much improvement was made was calculated.

[試験結果]
前記試験の結果を、表1に示す。

Figure 2017158228
[Test results]
The results of the test are shown in Table 1.
Figure 2017158228

(1)表1に示すとおり、洗浄前パネル劣化率は、太陽光パネル1が−10.1%、太陽光パネル2が−9.1%、太陽光パネル3が−8.1%、太陽光パネル4が−9.3%、太陽光パネル5が−7.8%、太陽光パネル6が−8.8%、太陽光パネル7が−9.1%、太陽光パネル8が−9.2%、太陽光パネル9が−9.3%、太陽光パネル10が−8.3%、太陽光パネル11が−8.1%であり、平均すると−8.8%(8.8%の劣化)であった。
(2)他方、洗浄後パネル劣化率は、太陽光パネル1が−2%、太陽光パネル2が−3.1%、太陽光パネル3が−1.8%、太陽光パネル4が−1.9%、太陽光パネル5が−1.1%、太陽光パネル6が−2.2%、太陽光パネル7が−2.3%、太陽光パネル8が−1.9%、太陽光パネル9が−1.9%、太陽光パネル10が−2.02%、太陽光パネル11が−2.07%であり、平均すると−2.02%(2.02%の劣化)であった。
(3)上記(1)の洗浄前パネル劣化率と(2)洗浄後パネル劣化率との差、すなわち、改善率は、太陽光パネル1が8.1%、太陽光パネル2が6%、太陽光パネル3が6.3%、太陽光パネル4が7.4%、太陽光パネル5が6.7%、太陽光パネル6が6.6%、太陽光パネル7が6.8%、太陽光パネル8が7.3%、太陽光パネル9が7.4%、太陽光パネル10が6.28%、太陽光パネル11が6.03%であり、平均すると6.78%(6.78%の改善)であった。
(1) As shown in Table 1, the panel deterioration rate before cleaning is as follows: solar panel 1 is -10.1%, solar panel 2 is -9.1%, solar panel 3 is -8.1%, solar The light panel 4 is -9.3%, the solar panel 5 is -7.8%, the solar panel 6 is -8.8%, the solar panel 7 is -9.1%, and the solar panel 8 is -9. 2%, solar panel 9 is −9.3%, solar panel 10 is −8.3%, and solar panel 11 is −8.1%, and on average −8.8% (8.8) % Degradation).
(2) On the other hand, the panel deterioration rate after cleaning is -2% for solar panel 1, -3.1% for solar panel 2, -1.8% for solar panel 3, and -1 for solar panel 4. .9%, solar panel 5 -1.1%, solar panel 6 -2.2%, solar panel 7 -2.3%, solar panel 8 -1.9%, sunlight Panel 9 is -1.9%, solar panel 10 is -2.02%, and solar panel 11 is -2.07%. On average, it is -2.02% (2.02% degradation). It was.
(3) The difference between the panel deterioration rate before cleaning in (1) above and (2) the panel deterioration rate after cleaning, that is, the improvement rate is 8.1% for solar panel 1, 6% for solar panel 2, Solar panel 3 is 6.3%, Solar panel 4 is 7.4%, Solar panel 5 is 6.7%, Solar panel 6 is 6.6%, Solar panel 7 is 6.8%, The solar panel 8 is 7.3%, the solar panel 9 is 7.4%, the solar panel 10 is 6.28%, the solar panel 11 is 6.03%, and the average is 6.78% (6 .78% improvement).

[考察]
前記試験結果から、本発明の洗浄方法で太陽光パネルを洗浄することによって、洗浄後パネル劣化率が大幅に改善すること、すなわち、洗浄後の太陽光パネル(洗浄後パネル)の発電量は、洗浄前の太陽光パネル(洗浄前パネル)の発電量よりも増えていることがわかる。前記試験結果の(3)に示す改善率は、ブラシやポリッシャー、化学洗剤を用いて太陽光パネル表面を洗浄した場合と同程度の改善率である。本発明の洗浄方法は、ブラシやポリッシャー、化学洗剤、洗い流し用の大量の水を使用することなく、これらを用いた場合と同程度の洗浄効果を奏するという点において、従来の洗浄方法と比較した有利な効果がある。また、ブラシやポリッシャー、化学洗剤、洗い流し用の大量の水を使用する必要がないため、こられを使用する場合の諸問題が生じないという点においても、従来の洗浄方法と比較した有利な効果がある。
[Discussion]
From the test results, by cleaning the solar panel with the cleaning method of the present invention, the panel deterioration rate after cleaning is greatly improved, that is, the power generation amount of the solar panel after cleaning (panel after cleaning) is: It can be seen that the power generation amount of the solar panel before cleaning (panel before cleaning) is increased. The improvement rate shown in (3) of the test result is the same improvement rate as when the surface of the solar panel was cleaned using a brush, polisher, or chemical detergent. The cleaning method of the present invention is compared with the conventional cleaning method in that it has the same cleaning effect as that of using a brush, polisher, chemical detergent, and a large amount of water for rinsing. Has an advantageous effect. In addition, since there is no need to use brushes, polishers, chemical detergents, or large amounts of water for rinsing, there are no problems when using these. There is.

本発明の洗浄方法は、太陽光パネルのほか、建物内のフロアや一般家庭や飲食店に設置されているシステムキッチンといった各種物体の洗浄に用いることもできる。
The washing | cleaning method of this invention can also be used for washing | cleaning of various objects, such as a system kitchen installed in the floor in a building, a general household, and a restaurant other than a solar panel.

Claims (6)

物体の洗浄方法において、
前記物体の表面に泡含有洗浄水を噴霧して、当該物体の表面に付着した汚れを浮き上がらせ、
前記浮き上がらせた汚れを含む泡含有洗浄水を前記物体の表面から除去することによって前記物体を洗浄する、
ことを特徴とする物体洗浄方法。
In the object cleaning method,
Spray the foam-containing washing water on the surface of the object, and lift the dirt attached to the surface of the object,
Cleaning the object by removing foam-containing cleaning water containing the raised dirt from the surface of the object;
An object cleaning method characterized by the above.
太陽光パネルの洗浄方法において、
前記太陽光パネルの表面に泡含有洗浄水を噴霧して、当該太陽光パネルの表面に付着した汚れを浮き上がらせ、
前記浮き上がらせた汚れを含む泡含有洗浄水を前記太陽光パネルの表面から除去することによって前記太陽光パネルを洗浄する、
ことを特徴とする太陽光パネル洗浄方法。
In the solar panel cleaning method,
Spraying foam-containing cleaning water on the surface of the solar panel to raise dirt adhering to the surface of the solar panel,
Cleaning the solar panel by removing the foam-containing cleaning water containing the raised dirt from the surface of the solar panel;
A solar panel cleaning method characterized by that.
請求項2記載の太陽光パネル洗浄方法において、
泡含有洗浄水として泡含有アルカリイオン水又は泡含有純水を噴霧することによって、太陽光パネルの表面に付着した汚れを浮き上がらせる、
ことを特徴とする太陽光パネル洗浄方法。
In the solar panel cleaning method according to claim 2,
By spraying the foam-containing alkaline ionized water or the foam-containing pure water as the foam-containing cleaning water, the dirt attached to the surface of the solar panel is raised.
A solar panel cleaning method characterized by that.
請求項2記載の太陽光パネル洗浄方法において、
泡含有洗浄水としてpH11以下の泡含有アルカリイオン水を噴霧することによって、太陽光パネルの表面に付着した汚れを浮き上がらせる、
ことを特徴とする太陽光パネル洗浄方法。
In the solar panel cleaning method according to claim 2,
By spraying foam-containing alkaline ionized water having a pH of 11 or less as the foam-containing washing water, the dirt attached to the surface of the solar panel is lifted.
A solar panel cleaning method characterized by that.
太陽光パネルの洗浄方法において、
前記太陽光パネルの表面にアルカリイオン水を噴霧して、当該太陽光パネルの表面に付着した汚れを浮き上がらせ、
前記浮き上がらせた汚れを含むアルカリイオン水を前記太陽光パネルの表面から除去することによって前記太陽光パネルを洗浄する、
ことを特徴とする太陽光パネル洗浄方法。
In the solar panel cleaning method,
Spraying alkaline ionized water on the surface of the solar panel to raise dirt adhering to the surface of the solar panel,
Washing the solar panel by removing alkaline ionized water containing the raised dirt from the surface of the solar panel;
A solar panel cleaning method characterized by that.
請求項5記載の太陽光パネル洗浄方法において、
太陽光パネルの表面にpH11以下のアルカリイオン水を噴霧して、当該太陽光パネルの表面に付着した汚れを浮き上がらせ、
前記浮き上がらせた汚れを含むアルカリイオン水を前記太陽光パネルの表面から除去することによって前記太陽光パネルを洗浄する、
ことを特徴とする太陽光パネル洗浄方法。
In the solar panel cleaning method according to claim 5,
Spraying the surface of the solar panel with alkaline ionized water having a pH of 11 or less to raise the dirt adhering to the surface of the solar panel,
Washing the solar panel by removing alkaline ionized water containing the raised dirt from the surface of the solar panel;
A solar panel cleaning method characterized by that.
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