Selective surface
id:
selective-surface-247-9194236
title:
Selective surface
text:
In solar thermal collectors, a selective surface or selective absorber is a means of increasing its operation temperature and/or efficiency. The selectivity is defined as the ratio of solar radiation absorption (αsol) to thermal infrared radiation emission (εtherm). Selective surfaces take advantage of the differing wavelengths of incident solar radiation and the emissive radiation from the absorbing surface: Solar radiation covers approximately the wavelengths 350 nm to 4000 nm; UV-A, visible a
brand slug:
wiki
category slug:
encyclopedia
description:
Ordinary surfaces re-radiate heat they absorb. Selective ones re-radiate only a little.
original url:
https://en.wikipedia.org/wiki/Selective_surface
date created:
date modified:
2023-12-31T08:53:28Z
main entity:
{"identifier":"Q7447791","url":"https://www.wikidata.org/entity/Q7447791"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/c/c8/Col%C2%B7lectors_solars_de_tub_de_buit.JPG","width":3249,"height":1881}
fields total:
13
integrity:
15