Naslov
Fixed Cylindrical Mirrors

Autori
Hudec, Mladen ; Jaguljnjak-Lazarević, Antonia

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Zbornik referata Međunarodni kongres ENERGIJA I OKOLIŠ 2002 XVIII znanstveni skup o energiji i zaštiti okoliša / Franković, Bernard - Rijeka : Hrvatski savez za sunčevu energiju, 2002, 69-74

Skup
Međunarodni kongres ENERGIJA I OKOLIŠ 2002 XVIII znanstveni skup o energiji i zaštiti okoliša

Mjesto i datum
Opatija, Hrvatska, 23.10.2002. - 25.10.2002

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
optics; mirrors; fixed cylindrical mirrors

Sažetak
The parabolic cylindrical mirrors are used to concentrate solar heat energy. The common used mirrors have to be turned horizontally and vertically to follow the relative daily and annual movement of the Sun. Such mirrors, having adequate mechanism, are expensive. We proposed long cylindrical mirrors, fixed in the direction east-west to collect intensive heat. The optical axis is oriented in the north center of gravity of the ecliptic line. A black tube accumulating the heat is placed at the focus of such mirror. The mirror does not have a curved surface, but is made of longitudinal flat strips of limited width, made of common glass. With such a mirror, the optical advantage of parabolic form is no more relevant, so the mirror can have the form of a circular cylinder. With the orientation of cylinder in east-west direction, it is not necessary to follow the daily movement of the Sun. Because of a change of the declination of the sun, the zone of maximal concentration of the rays moves along a straight line near the focal distance. The result is that the black tube has to be moved only some centimeters, in temporal intervals they depend on the position of the sun over celestial aquator.

Izvorni jezik
Engleski

Znanstvena područja
Rudarstvo, nafta i geološko inženjerstvo

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