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Incidence factors of the tracking systems used in parabolic-cylindrical concentrators

Thomas, A (1980) Incidence factors of the tracking systems used in parabolic-cylindrical concentrators. In: Journal Of The Indian Institute Of Science Section A-Engineering & Technology, 62 (11). pp. 213-219.

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Abstract

Several orientation and tracking systems employed in parabolic-cylindrical concentrators for focusing the direct solar radiation on the absorber tubes are analyzed from the technical and economic points of view. Case one, where the incidence factor was a function of declination and hour angle, showed that the maximum variations of incident factor from morning to noon was 0.5 at zero angle of declination. Case two, where the incidence factor was a function of declination, hour angle and latitude, showed the maximum variation of the incidence factor to be 0.128, which occurred during noon at the latitude of 30 degrees, corresponding to a change of declination from 0 to 23.5 degrees. In case three, the incidence factor, a function of declination only, showed that the maximum variation of the incidence factor corresponding to the change in declination from 0 to 23.5 degree was 0.0758. It is concluded that system three is the most efficient from the technical and economic point of view.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Indian Institute of Science.
Keywords: Concentrators, Incident Radiation, Parabolic Reflectors, Solar Collectors, Solar Position, Cylindrical Bodies, Solar Energy Absorbers, Star Trackers, Technology Assessment, Tracking.
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation and Applied Physics (Formally ISU)
Date Deposited: 21 Aug 2009 05:44
Last Modified: 21 Aug 2009 05:44
URI: http://eprints.iisc.ernet.in/id/eprint/21722

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