Selective Surface
Selective Surface
| Autor: | Antigone Fernande |
|---|---|
| Verfügbarkeit: | Auf Lager. |
| Artikelnummer: | 963779 |
| ISBN / EAN: | 9786138552826 |
Zusatzinformation
- Autor: Antigone Fernande
- Verlag: Betascript Publishing
- ISBN / EAN: 9786138552826
- Bindung: Taschenbuch
Produktbeschreibung
In solar thermal collectors, a selective surface is a means of increasing its operation temperature and/or efficiency. The selectivity is defined as the ratio of radiation-absorption (alpha) to radiation-emission (epsilon). Selective surfaces take advantage of the differing wavelengths of incident solar radiation and the emissive radiation from the absorbing surface. Normally, a combination of materials is used. One of the first selective surfaces investigated was simply copper with a layer of black cupric oxide. Black chromium ("black chrome") nickel-plated copper is another selective surface that is very durable, highly resistant to humidity or oxidizing atmospheres and extreme temperatures while being able to retain its selective properties - but expensive. Another combination consists of steel plated with gold, silicon, and silicon dioxide.
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