Application of high-density daylight for indoor illumination

A fiber optic solar concentrator system with a simple parabolic profile is designed and fabricated to deliver a stream of high-density solar flux into the interior of a building for indoor illumination. The system consists of a small dish concentrator (30cm in diameter), an optical fiber cable and a...

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Bibliographic Details
Published in:Energy (Oxford) 2010-06, Vol.35 (6), p.2654-2666
Main Authors: Han, Hyunjoo, Tai Kim, Jeong
Format: Article
Language:English
Subjects:
Applied sciences
Buildings
Buildings. Public works
Exact sciences and technology
Fiber optic concentrator
Goniophotometer
Indoor illumination
Mock-up model
Photometric property
Religious building
Spectrometer
Types of buildings
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Summary:A fiber optic solar concentrator system with a simple parabolic profile is designed and fabricated to deliver a stream of high-density solar flux into the interior of a building for indoor illumination. The system consists of a small dish concentrator (30cm in diameter), an optical fiber cable and a diffuser at the end. A series of tests are performed using a goniophotometer and spectrometer to investigate the photometric characteristics of the system in terms of luminous intensity distribution and spectral radiance, which are used in link with the actual photometric measurements for a lightless mock-up space of 4.9m×4.9m×2.6m. The illuminance on the working plane was continuously monitored at 25 points by using photometric sensors. Measurements clearly indicate the photometric characteristics of the present system where a constant level of indoor illumination is observed depending on the sky clearness.
ISSN:0360-5442
DOI:10.1016/j.energy.2009.05.037