JPS5833466B2 - solar heat collector - Google Patents
solar heat collectorInfo
- Publication number
- JPS5833466B2 JPS5833466B2 JP51031121A JP3112176A JPS5833466B2 JP S5833466 B2 JPS5833466 B2 JP S5833466B2 JP 51031121 A JP51031121 A JP 51031121A JP 3112176 A JP3112176 A JP 3112176A JP S5833466 B2 JPS5833466 B2 JP S5833466B2
- Authority
- JP
- Japan
- Prior art keywords
- heat collector
- solar heat
- film
- transmission plate
- thickness
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S70/00—Details of absorbing elements
- F24S70/20—Details of absorbing elements characterised by absorbing coatings; characterised by surface treatment for increasing absorption
- F24S70/225—Details of absorbing elements characterised by absorbing coatings; characterised by surface treatment for increasing absorption for spectrally selective absorption
-
- 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
Description
【発明の詳細な説明】
本発明は太陽熱集熱器に関し、透過板を透過した太陽光
から集熱するようにした太陽熱集熱器の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solar heat collector, and relates to an improvement of a solar heat collector that collects heat from sunlight transmitted through a transmission plate.
この種太陽熱集熱器は第１図に示すように、箱体外枠１
にて囲まれる部分の上面に透過板２を設け、この透過板
２下方に熱吸収板３を配置し、この吸収板３と水等の媒
体が流通する流通管４を熱交換関係に配置し、流通管４
を通る流体を加温するものである。As shown in Figure 1, this type of solar heat collector has a box outer frame 1
A transmission plate 2 is provided on the upper surface of the area surrounded by , a heat absorption plate 3 is arranged below this transmission plate 2, and this absorption plate 3 and a distribution pipe 4 through which a medium such as water flows are arranged in a heat exchange relationship. , distribution pipe 4
It heats the fluid passing through it.
一般に、前記透過板２は第２図に示すＡの波長分布を有
した太陽光を最大限透過させ第２図に示すＢの波長分布
特性を有した熱輻射光（例として２００℃を考える）が
吸収板３から透過板２を通して集熱器外に逃げなＬ・よ
うに反射させる機能を要求され、斯る透過板は選択透過
板と呼ばれる。In general, the transmitting plate 2 transmits maximum sunlight having a wavelength distribution of A shown in FIG. 2, and thermal radiation having a wavelength distribution of B shown in FIG. 2 (for example, consider 200°C). It is required to have a function of reflecting the light from the absorption plate 3 through the transmission plate 2 to the outside of the heat collector, and such a transmission plate is called a selective transmission plate.
本発明は赤外光域で高反射特性を有する膜厚が約５ｏｏ
ｏ１以上の透明導電性膜５をガラス基板６上に被覆し、
更に屈折率かガラスよりも小さく膜厚が赤外光域で光学
的に無視できる厚みの薄膜７を一層な℃・し数層重ねて
被覆してなる選択透過板８を透過板２として用Ｌ・たも
のである。The present invention has a film thickness of approximately 500 mm that has high reflection characteristics in the infrared light region.
A transparent conductive film 5 of o1 or more is coated on a glass substrate 6,
Furthermore, a selective transmission plate 8 is used as the transmission plate 2, which is coated with a thin film 7 having a refractive index lower than that of glass and having a thickness that can be optically ignored in the infrared light region by stacking several layers at °C.・It is something.
即ち、これを詳述すると、酸化スズ、酸化インジウム、
酸化チタン、酸化ジルコニウム等の透明導電性膜５は、
膜厚を大きくすると赤外光域の反射特性が良くなること
が知られており一方、居抜率が酸化スズで１．７〜２．
０、酸化インジウムで１．８〜２．０１酸化チタンで２
．３〜２．５、酸化ジルコンで１．９〜２．２位とガラ
ス等の透過基板に比して高（、可視光域での反射率が増
加する。That is, to explain this in detail, tin oxide, indium oxide,
The transparent conductive film 5 made of titanium oxide, zirconium oxide, etc.
It is known that increasing the film thickness improves the reflection characteristics in the infrared region, and on the other hand, the void ratio of tin oxide is 1.7 to 2.
0, indium oxide 1.8-2.01 titanium oxide 2
．． 3 to 2.5, and 1.9 to 2.2 for zircon oxide, which is high compared to transparent substrates such as glass (and the reflectance in the visible light range increases).
よって、赤外光域での反射特性を良好にすると共に可視
光域での反射率を減少すべく、透明導電性膜５の膜厚を
略λ。Therefore, in order to improve the reflection characteristics in the infrared light region and reduce the reflectance in the visible light region, the thickness of the transparent conductive film 5 is set to approximately λ.
（λ。＝ｓｏｏｏＸ）以上とすると共にこの導電性膜５
に屈折率がガラスよりも小さＬ・二酸化シリコン、弗化
マグネシウム、弗化トリウム等の薄膜７をその膜厚が赤
外光域で光学的に無視できる厚み（赤外光域の波長をλ
とするとλ／４０以下の厚み）にして真空蒸着等の手段
で重ねて被覆したものである。(λ.=soooX) or more, and this conductive film 5
A thin film 7 of silicon dioxide, magnesium fluoride, thorium fluoride, etc., whose refractive index is smaller than that of glass, has a thickness that is optically negligible in the infrared region (the wavelength in the infrared region is λ).
In this case, the thickness is λ/40 or less) and the layers are coated in layers by means such as vacuum evaporation.
斯る本発明の実施例として、透明導電性膜５を酸化イン
ジウム（Ｉｎ２０ｇ）膜、薄膜７を二酸化シリコン（Ｓ
ｉＯ２）膜とし、透明導電性膜５の膜厚をθ１λ。As an embodiment of the present invention, the transparent conductive film 5 is an indium oxide (In20g) film, and the thin film 7 is a silicon dioxide (S20g) film.
iO2) film, and the thickness of the transparent conductive film 5 is θ1λ.
、薄膜γの膜厚をθ２λ０とし、［Ｆ］θ１−１、θ２
１／４、■θ１＝２、θ２−１／４、■θ１＝５、θＥ
１ ／ ４、とした透過板８の波長−反射率特性をそれ
ぞれ第４図、第５図、第６図に示す。, the thickness of the thin film γ is θ2λ0, [F]θ1-1, θ2
1/4, ■θ1=2, θ2-1/4, ■θ1=5, θE
1/4, the wavelength-reflectance characteristics of the transmission plate 8 are shown in FIGS. 4, 5, and 6, respectively.
この例から分るように、本発明は透過板８に於ける可視
光域での平均的反射率をガラスの反射率４％に比して小
さくすることができ、太陽光の透過度を高くすることが
できると共に透明導電性膜５の膜厚を約λ。As can be seen from this example, the present invention can reduce the average reflectance of the transmitting plate 8 in the visible light range compared to the reflectance of glass, which is 4%, and increase the transmittance of sunlight. The thickness of the transparent conductive film 5 can be approximately λ.
以上とすると共に薄膜７の影響は無視できるので、透過
板８に於ける赤外光域での反射率が大きく、全体として
収態効率の高Ｌ・太陽熱集熱器を提供できる。In addition to the above, since the influence of the thin film 7 can be ignored, the reflectance of the transmitting plate 8 in the infrared light region is large, and it is possible to provide a solar heat collector with high L/concentration efficiency as a whole.
又、透明導電性膜５の膜厚を厚くすれば、真空蒸着法に
よらず化学蒸着法等の安価な方法を採用でき、コストダ
ウンを図ることができる効果もある。Further, by increasing the thickness of the transparent conductive film 5, an inexpensive method such as chemical vapor deposition can be used instead of the vacuum deposition method, which has the effect of reducing costs.
第１図は太陽熱集熱器の要部切欠断面せる斜視図、第２
図は太陽光及び熱輻射光の波長−強度特性図、第３図は
本発明太陽集熱器に用Ｌ・られる選択透過板の要部断面
図、第４図〜第６図は異なる実施例による透過板の波長
−反射率特性図である。
５・・・透明導電性膜、６・・・ガラス基板、７・・・
薄膜、８・・・選択透過板。Figure 1 is a cutaway perspective view of the main parts of a solar heat collector;
The figure is a wavelength-intensity characteristic diagram of sunlight and thermal radiation, Figure 3 is a sectional view of the main part of a selective transmission plate used in the solar collector of the present invention, and Figures 4 to 6 are different embodiments. FIG. 5... Transparent conductive film, 6... Glass substrate, 7...
Thin film, 8... selective transmission plate.
Claims (1)
た太陽熱集熱器におＬ゛て、ガラス基板と、この基板上
に被覆され膜厚が略５０００Ｘ以上の透明導電性膜と、
この膜に重ねて被覆され屈折率がガラスよりも小さく膜
厚が赤外光線で光学的に無視できる厚みの薄膜とから前
記選択透過板を構成したことを特徴とする太陽熱集熱器
。1. A solar heat collector configured to collect heat from sunlight transmitted through a selective transmission plate includes a glass substrate, a transparent conductive film coated on the substrate and having a film thickness of approximately 5000X or more,
A solar heat collector characterized in that the selective transmission plate is constructed of a thin film which is coated over the film and has a refractive index lower than that of glass and a film thickness that can be optically ignored by infrared rays.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51031121A JPS5833466B2 (en) | 1976-03-18 | 1976-03-18 | solar heat collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51031121A JPS5833466B2 (en) | 1976-03-18 | 1976-03-18 | solar heat collector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS52112832A JPS52112832A (en) | 1977-09-21 |
| JPS5833466B2 true JPS5833466B2 (en) | 1983-07-20 |
Family
ID=12322571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP51031121A Expired JPS5833466B2 (en) | 1976-03-18 | 1976-03-18 | solar heat collector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5833466B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5610654A (en) * | 1979-07-09 | 1981-02-03 | Agency Of Ind Science & Technol | Solar heat collector |
| JPS575496Y2 (en) * | 1979-08-01 | 1982-02-02 | ||
| USRE35409E (en) * | 1982-09-24 | 1996-12-24 | Moore; Sidney D. | Electrically addressable opto-electronic indicator for making dynamic evaluations of microscopic or larger subjects |
-
1976
- 1976-03-18 JP JP51031121A patent/JPS5833466B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52112832A (en) | 1977-09-21 |
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