Development of Optical Fiber-Based Daylighting System and Its Comparison

Irfan Ullah and Allen Jong-Woei Whang
Additional contact information
Irfan Ullah: Graduate Institute of Color and Illumination Technology, National Taiwan University of Science and Technology, #43, Section 4, Keelung Road, Taipei 106, Taiwan
Allen Jong-Woei Whang: Graduate Institute of Color and Illumination Technology, National Taiwan University of Science and Technology, #43, Section 4, Keelung Road, Taipei 106, Taiwan

Energies, 2015, vol. 8, issue 7, 1-17

Abstract: Fiber-optic daylighting systems have been shown to be a promising and effective way to transmit sunlight in the interior space whilst reducing electric lighting energy consumption. To increase efficiency in terms of providing uniform illumination in the interior, the current need is to illuminate optical fiber-bundle with uniform light flux. To this end, we propose a method for achieving collimated light, which illuminates the fiber-bundle uniformly. Light is collected through a parabolic concentrator and focused toward a collimating lens, which distributes the light over each optical fiber. An optics diffusing structure is utilized at the end side of the fiber bundle to spread light in the interior. The results clearly reveal that the efficiency in terms of uniform illumination, which also reduces the heat problem for optical fibers, is improved. Furthermore, a comparison study is conducted between current and previous approaches. As a result, the proposed daylighting system turns out convenient in terms of energy saving and reduction in greenhouse gas emissions.

Keywords: solar concentrator; daylighting; uniform illumination; daylight modeling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (8)

Downloads: (external link)
https://www.mdpi.com/1996-1073/8/7/7185/pdf (application/pdf)
https://www.mdpi.com/1996-1073/8/7/7185/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:8:y:2015:i:7:p:7185-7201:d:52623

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().