JP2602268Y2 - Solar heat collector - Google Patents
Solar heat collectorInfo
- Publication number
- JP2602268Y2 JP2602268Y2 JP1993026620U JP2662093U JP2602268Y2 JP 2602268 Y2 JP2602268 Y2 JP 2602268Y2 JP 1993026620 U JP1993026620 U JP 1993026620U JP 2662093 U JP2662093 U JP 2662093U JP 2602268 Y2 JP2602268 Y2 JP 2602268Y2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- light
- wavelength
- collecting plate
- solar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
Landscapes
- Photovoltaic Devices (AREA)
Description
【考案の詳細な説明】[Detailed description of the invention]
【産業上の利用分野】本考案は、温水などを得るために
太陽光エネルギーを熱エネルギーに変換する太陽熱集熱
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar heat collecting apparatus for converting solar energy into heat energy to obtain hot water or the like.
【従来の技術】従来の太陽熱集熱装置は、受熱箱内に集
熱板を配置し、受熱箱の開口部に透明なカバーガラスを
配置し、受熱箱内に断熱材を配置している。図2は、か
かる従来の太陽熱集熱装置の集熱板、カバーガラス、断
熱材の配置などの一例を説明する図である。同図を参照
して、太陽光の入光側から、カバーガラス1、太陽熱を
受光して集熱する集熱板2、断熱材3が配置されてい
る。カバーガラス1と集熱板2との間には断熱空気層4
が封入されている。断熱材3と集熱板2との間には熱媒
体としての空気が流通する熱媒体流路5が形成され、集
熱板が集熱した太陽熱を熱媒体たる空気が媒介して、か
かる熱を用いて温水などを得ている。熱媒体たる空気の
流れは、図中に矢示で示した。6は断熱材を支持する板
材であり、7は受熱箱底部である。集熱板の太陽光入光
側の面、すなわち受光面には選択吸収膜8が形成されて
いる。選択吸収膜8は光の波長により吸収率(放射率)
が異なる材料によってなり、比較的長い波長(太陽熱集
熱の温度域、大体60〜100℃程度での波長)の光の
吸収率(放射率)は低く、比較的短い波長の光(太陽
光)の吸収率(放射率)が高くなっている。これによ
り、集熱板2による太陽光の吸収効率を高める一方で、
太陽熱集熱の温度域における集熱板2からの輻射損失を
低減させている。このような選択吸収膜8の具体例につ
いては、その構造、基材、形成法などとともに図3、4
に示す。2. Description of the Related Art In a conventional solar heat collecting apparatus, a heat collecting plate is disposed in a heat receiving box, a transparent cover glass is disposed in an opening of the heat receiving box, and a heat insulating material is disposed in the heat receiving box. FIG. 2 is a diagram illustrating an example of the arrangement of a heat collecting plate, a cover glass, and a heat insulating material of such a conventional solar heat collecting apparatus. Referring to FIG. 1, a cover glass 1, a heat collecting plate 2 that receives solar heat and collects heat, and a heat insulating material 3 are arranged from the light incident side of sunlight. Insulated air layer 4 between cover glass 1 and heat collecting plate 2
Is enclosed. A heat medium flow path 5 through which air as a heat medium flows is formed between the heat insulating material 3 and the heat collecting plate 2, and the air as a heat medium mediates the solar heat collected by the heat collecting plate, thereby generating the heat. To obtain hot water. The flow of air as a heat medium is indicated by arrows in the figure. Reference numeral 6 denotes a plate supporting the heat insulating material, and reference numeral 7 denotes a bottom of the heat receiving box. A selective absorption film 8 is formed on the surface of the heat collecting plate on the sunlight incident side, that is, on the light receiving surface. The selective absorption film 8 has an absorptance (emissivity) depending on the wavelength of light.
Is made of a different material, has a low absorption rate (emissivity) of light having a relatively long wavelength (a temperature range of solar heat collection, about 60 to 100 ° C.), and light having a relatively short wavelength (sunlight). Has an increased absorption rate (emissivity). Thereby, while increasing the efficiency of absorbing sunlight by the heat collecting plate 2,
Radiation loss from the heat collecting plate 2 in the solar heat collecting temperature range is reduced. 3 and 4 show a specific example of such a selective absorption film 8 together with its structure, base material, formation method and the like.
Shown in
【考案が解決しようとする課題】しかし、集熱板2の熱
媒体たる空気に対する伝熱面積の広さには自ずと限界が
あり、空気などの熱媒体の熱容量にも自ずと限界があ
り、熱媒体を無制限に大量に熱媒体流路4に流通させる
わけにもいかず、よって、熱媒体に充分に放射熱伝達さ
れず、熱媒体による熱の媒介量は充分とはいえないた
め、選択吸収膜8の太陽光吸収効率の高さを十分に活か
すことができなかった。また、選択吸収膜8としては酸
化銅黒、酸化鉄黒が用いられる場合が多いが、これらは
一般的には化成処理により集熱板2に形成されるため、
集熱板の受光面だけではなく、その裏面にも選択吸収膜
が形成されてしまうこととなり、かかる裏面の太陽熱集
熱温度域における波長の光の放射率が低くなってしま
い、この点でも、熱媒体に充分に放射熱伝達されず、熱
媒体による熱の媒介量は充分とはいえないため、選択吸
収膜8の太陽光吸収効率の高さを充分に活かすことがで
きなかった。本考案は、熱媒体への放射熱伝達を充分に
行なえることができて、熱媒体による熱の媒介量を大き
くすることができ、もって選択吸収膜の太陽光吸収効率
の高さを充分に活かすことができる太陽熱集熱装置を提
供することを目的とする。However, the size of the heat transfer area of the heat collecting plate 2 with respect to the air as the heat medium is naturally limited, and the heat capacity of the heat medium such as air is also naturally limited. Cannot be circulated through the heat medium flow path 4 in an unlimited amount. Therefore, the radiant heat is not sufficiently transmitted to the heat medium, and the heat transfer amount of the heat medium is not sufficient. Could not make full use of the high solar absorption efficiency. In addition, copper oxide black and iron oxide black are often used as the selective absorption film 8, but since these are generally formed on the heat collecting plate 2 by a chemical conversion treatment,
Not only the light-receiving surface of the heat collecting plate, but also the selective absorption film will be formed on the back surface, and the emissivity of light of a wavelength in the solar heat collecting temperature range on the back surface will be low. Since the radiation heat is not sufficiently transferred to the heat medium and the amount of heat transfer by the heat medium is not sufficient, the high solar absorption efficiency of the selective absorption film 8 cannot be sufficiently utilized. According to the present invention, radiant heat transfer to the heat medium can be sufficiently performed, the amount of heat transfer by the heat medium can be increased, and the high solar absorption efficiency of the selective absorption film can be sufficiently increased. It is an object of the present invention to provide a solar heat collector that can be utilized.
【課題を解決するための手段】かかる課題を解決するた
めの本考案の要旨は、太陽熱を受光して集熱する受光面
を有する集熱板と、該集熱板が吸熱した熱を媒介する熱
媒体を流通させる熱媒体流路とを備え、該熱媒体流路は
前記集熱板の前記受光面とは反対の面側に形成され、比
較的長い波長の光より比較的短い波長の光の吸収率又は
放射率が高い選択吸収膜を前記受光面に形成した太陽熱
集熱装置において、前記反対の面を前記選択吸収膜より
比較的長い波長の光の吸収率又は放射率が高い裏面放射
面とする とともに、前記選択吸収膜より比較的長い波長
の光の吸収率又は放射率が高い第2の放射面を前記裏面
放射面とは前記熱媒体流路を挟んで対峙して形成し、か
つ該第2の放射面の裏側に断熱材を設けたことを特徴と
する太陽熱集熱装置にある。The gist of the present invention for solving the above problems is to provide a heat collecting plate having a light receiving surface for receiving and collecting solar heat, and to mediate the heat absorbed by the heat collecting plate. A heat medium flow path through which a heat medium flows, wherein the heat medium flow path is formed on a surface of the heat collecting plate opposite to the light receiving surface, and has a relatively shorter wavelength than a relatively long wavelength light. in absorptivity or emissivity highly selective absorption film solar heat collector which is formed on the light receiving surface, absorptivity or emissivity of the relatively long wavelength light from a surface of said selective absorption film of opposition is high backside of with the emitting surface, a relatively long wavelength than the selective absorption film
A second radiation surface having a high light absorptance or emissivity of the back surface
The radiation surface is formed so as to face the heat medium flow path,
The solar heat collector further comprises a heat insulating material provided on the back side of the second radiation surface .
【作用】選択吸収膜は比較的長い波長の光より比較的短
い波長の光の吸収率又は放射率が高いため、集熱板は受
光面で太陽光(比較的短い波長の光)を高効率で吸収す
る。このように太陽光を吸収した集熱板は、選択吸収膜
より比較的長い波長の光の吸収率又は放射率が高い裏面
放射面が太陽熱集熱温度域の波長の光(比較的長い波長
の光)を放射しやすいことから、熱媒体に容易に放射熱
伝達され、熱媒体による熱の媒介量を大きくすることが
できる。さらに、選択吸収膜より比較的長い波長の光の
吸収率又は放射率が高い第2の放射面を形成したので、
第2の放射面は裏面放射面から放射される太陽熱集熱温
度域の波長の光(比較的長い波長の光)の一部を容易に
吸収して放射するから、熱媒体は裏面放射面と第2の放
射面との両側から加熱され、熱媒体による熱の媒介量を
更に大きくすることができる。[Function] Since the selective absorption film has a higher absorptance or emissivity of light of a relatively short wavelength than light of a relatively long wavelength, the heat collecting plate efficiently absorbs sunlight (light of a relatively short wavelength) on a light receiving surface. To absorb. The heat-collecting plate that has absorbed sunlight as described above has a back surface having a higher absorption or emissivity of light having a wavelength longer than that of the selective absorption film. Since the heat medium is easily radiated, radiant heat is easily transmitted to the heat medium, and the amount of heat transfer by the heat medium can be increased. Further, since the form absorptivity or emissivity higher second radiation surface of the light having a relatively longer wavelength selective absorption film,
Since the second radiation surface easily absorbs and radiates a part of light having a wavelength in the solar heat collecting temperature range (light having a relatively long wavelength) radiated from the rear radiation surface, the heat medium is disposed on the rear radiation surface. Heating is performed from both sides of the second radiation surface, and the amount of heat transfer by the heat medium can be further increased.
【実施例】以下、本考案の実施例について図面を参照し
つつ説明する。図1は本考案の実施例にかかる太陽熱集
熱装置の構造を説明する一部切欠き断面図である。図2
と同一符号の部材は図2を参照しつつ説明した従来の太
陽熱集熱装置と同様機能の部材であり、説明を省略す
る。10はカバーガラスを支持するためのカバーガラス
押さえ、11はパッキン、12は受熱箱の外枠、13は
断熱材、14は熱媒体流路5に熱媒体たる空気を導入す
る熱媒体導入口である。熱媒体たる空気の流れは図中に
矢印で示した。本実施例の太陽熱集熱装置においては、
集熱板2の太陽熱を受光して集熱する受光面の反対の面
に選択吸収膜8より太陽熱集熱温度域の波長(比較的長
い波長)の光の放射率(吸収率)が高い材料を塗装や貼
り付けなどにより形成し、裏面放射面9としている。か
かる裏面放射面9の形成は、例えば黒色塗料(東京ペイ
ント株式会社製のアクリスターALK−YPなどが使用
できる。)の塗布などにより行なうことができる。例え
ばこのような黒色塗料は、一般にすべての波長域の光に
ついて放射率が高い。さらに、選択吸収膜8より比較的
長い波長の光の放射率(吸収率)が高い第2の放射面1
5を集熱板2の裏面放射面9とは熱媒体流路5を挟んで
対峙して形成している。すなわち、図1に示す太陽熱集
熱器では板材6上に形成している。第2の放射面15を
形成する素材は、裏面放射面9と同様の黒色塗料などを
用いる。そして、第2の放射面15の裏側、すなわち板
材6の下に断熱材3が配置されている。 本実施例の太陽
熱集熱装置の作用について説明すると、選択吸収膜8は
比較的長い波長の光より比較的短い波長の光の吸収率が
高いため、集熱板2は受光面で太陽光(比較的短い波長
の光)を高効率で吸収する。このように太陽光を吸収し
た集熱板2は、選択吸収膜8より比較的長い波長の光の
放射率が高い裏面放射面9が太陽熱集熱温度域の波長の
光(比較的長い波長の光)を放射しやすいことから、熱
媒体たる空気に容易に放射熱伝達され、熱媒体たる空気
による熱の媒介量を大きくすることができる。 さらに、
第2の放射面15は裏面放射面9から放射される太陽熱
集熱温度域の波長の光(比較的長い波長の光)の一部を
容易に吸収して放射するから、熱媒体たる空気は裏面放
射面9と第2の放射面15との両側から加熱され、熱媒
体たる空気による熱の媒介量を更に大きくすることがで
きる。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Figure 1 is a cutaway sectional view of a portion illustrating the structure of the solar heat collector according to the actual施例of the present invention. Figure 2
The members having the same reference numerals as the members having the same functions as those of the conventional solar heat collecting apparatus described with reference to FIG. 2 are omitted. 10 is a cover glass holder for supporting the cover glass, 11 is a packing, 12 is an outer frame of a heat receiving box, 13 is a heat insulating material, and 14 is a heat medium inlet for introducing air as a heat medium into the heat medium flow path 5. is there. The flow of air as a heating medium is shown in the figure.
Indicated by arrows . In the solar heat collecting apparatus of the present embodiment,
Radiation of light having a wavelength of solar heat collector temperature range from selective absorption film 8 on the surface of the opposition of the current heat receiving surface by receiving the solar heat collecting plate 2 (longer wavelengths) (absorption rate) is high The material is formed by painting, pasting, or the like to form the back surface radiation surface 9. The formation of the rear emission surface 9 can be performed by, for example, applying a black paint (Acryster ALK-YP manufactured by Tokyo Paint Co., Ltd. can be used) or the like. For example, such a black paint generally has a high emissivity for light in all wavelength ranges. Further , the second radiation surface 1 having a higher emissivity (absorbance) of light having a wavelength longer than that of the selective absorption film 8.
5 is a back emission surface 9 of the heat collecting plate 2 are formed to face Nde clamping the heat medium flow path 5. That is, the solar heat collector shown in FIG. 1 is formed on the plate 6. As a material for forming the second radiation surface 15, the same black paint as the rear radiation surface 9 is used. And the back side of the second radiating surface 15, that is, the plate
The heat insulating material 3 is arranged below the material 6. Sun of the present embodiment
The operation of the heat collecting device will be described.
Absorbance of light of a relatively short wavelength is higher than that of light of a relatively long wavelength.
Due to its high height, the heat collecting plate 2 receives sunlight (a relatively short wavelength
Light) with high efficiency. In this way, it absorbs sunlight
The heat collecting plate 2 has a relatively longer wavelength than the selective absorption film 8.
The back radiation surface 9 with high emissivity has the wavelength of the solar heat collecting temperature range.
Because it is easy to emit light (light with a relatively long wavelength), heat
Radiant heat is easily transferred to the medium air, and the heat medium air
Can increase the amount of heat transfer. Furthermore ,
The second radiating surface 15 easily absorbs and radiates a part of light having a wavelength in the solar heat collecting temperature range (light having a relatively long wavelength) radiated from the back surface radiating surface 9, so that the air as the heat medium is Heating is performed from both sides of the back surface radiating surface 9 and the second radiating surface 15, and the amount of heat transfer by the air as the heat medium can be further increased.
【考案の効果】以上説明した本考案の太陽熱集熱装置に
よれば、上述のとおり裏面放射面と第2の放射面とを熱
媒体流路を挟んで対峙して形成したので、熱媒体による
熱の媒介量を大きくすることができるから、もって選択
吸収膜の太陽光吸収効率の高さを充分に活かすことがで
きる太陽熱集熱装置を提供することができる。According to the solar heat collecting apparatus of the present invention described above, the back radiation surface and the second radiation surface are heated as described above.
Since it is formed facing each other with the medium flow path interposed, the amount of heat transfer by the heat medium can be increased, so that the solar heat collection that can fully utilize the high solar absorption efficiency of the selective absorption film An apparatus can be provided.
【図1】本考案の実施例にかかる太陽熱集熱装置の構造
を説明する一部切欠き断面図である。1 is a cutaway sectional view of a portion illustrating the structure of the solar heat collector according to the actual施例of the present invention.
【図2】従来の太陽熱集熱装置の集熱板、カバーガラ
ス、断熱材の配置などの一例を説明する図である。FIG. 2 is a diagram illustrating an example of the arrangement of a heat collecting plate, a cover glass, and a heat insulating material of a conventional solar heat collecting apparatus.
【図3】従来の太陽熱集熱装置に適用する選択吸収膜の
例を示す図である。FIG. 3 is a diagram showing an example of a selective absorption film applied to a conventional solar heat collecting apparatus.
【図4】従来の太陽熱集熱装置に適用する選択吸収膜の
例を示す図である。FIG. 4 is a diagram showing an example of a selective absorption film applied to a conventional solar heat collecting apparatus.
2 集熱板 5 熱媒体流路 8 選択吸収膜 9 裏面放射面 15 第2の放射面 2 Heat collecting plate 5 Heat medium flow path 8 Selective absorption film 9 Back radiation surface 15 Second radiation surface
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭57−196950(JP,U) 実開 昭58−50650(JP,U) 実開 昭59−86550(JP,U) 実開 昭60−14458(JP,U) 実開 昭60−139446(JP,U) (58)調査した分野(Int.Cl.7,DB名) F24J 2/04 F F24J 2/48 A ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 57-196950 (JP, U) Japanese Utility Model Showa 58-50650 (JP, U) Japanese Utility Model Showa 59-86550 (JP, U) Japanese Utility Model Showa 60- 14458 (JP, U) Shokai Sho 60-139446 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) F24J 2/04 F F24J 2/48 A
Claims (1)
る集熱板と、該集熱板が吸熱した熱を媒介する熱媒体を
流通させる熱媒体流路とを備え、該熱媒体流路は前記集
熱板の前記受光面とは反対の面側に形成され、比較的長
い波長の光より比較的短い波長の光の吸収率又は放射率
が高い選択吸収膜を前記受光面に形成した太陽熱集熱装
置において、前記反対の面を前記選択吸収膜より比較的
長い波長の光の吸収率又は放射率が高い裏面放射面とす
るとともに、前記選択吸収膜より比較的長い波長の光の
吸収率又は放射率が高い第2の放射面を前記裏面放射面
とは前記熱媒体流路を挟んで対峙して形成し、かつ該第
2の放射面の裏側に断熱材を設けたことを特徴とする太
陽熱集熱装置。1. A heat collecting plate having a light receiving surface for receiving solar heat and collecting heat, and a heat medium flow path for flowing a heat medium that mediates the heat absorbed by the heat collecting plate, The path is formed on the surface of the heat collecting plate opposite to the light receiving surface, and a selective absorption film having a higher absorption or emissivity of light of a relatively short wavelength than light of a relatively long wavelength is formed on the light receiving surface. In the solar heat collecting apparatus, the opposite surface is a high-absorption or emissivity back surface emitting light having a wavelength longer than the selective absorption film, and a light emission surface having a relatively longer wavelength than the selective absorption film. A second radiation surface having a high absorptance or emissivity is formed to face the back radiation surface with the heat medium flow path interposed therebetween , and
2. A solar heat collector, wherein a heat insulating material is provided on the back side of the radiation surface of 2 .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1993026620U JP2602268Y2 (en) | 1993-05-21 | 1993-05-21 | Solar heat collector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1993026620U JP2602268Y2 (en) | 1993-05-21 | 1993-05-21 | Solar heat collector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0684264U JPH0684264U (en) | 1994-12-02 |
JP2602268Y2 true JP2602268Y2 (en) | 2000-01-11 |
Family
ID=12198523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1993026620U Expired - Lifetime JP2602268Y2 (en) | 1993-05-21 | 1993-05-21 | Solar heat collector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2602268Y2 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5986550U (en) * | 1982-12-02 | 1984-06-12 | 富士電機株式会社 | Pneumatic solar collector |
JPS60139446U (en) * | 1984-02-27 | 1985-09-14 | 中部クリエ−ト工業株式会社 | Solar heat collection and insulation sheet |
-
1993
- 1993-05-21 JP JP1993026620U patent/JP2602268Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0684264U (en) | 1994-12-02 |
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