Accessibility navigation


Optimizing performance of the lightshelf by modifying ceiling geometry in highly luminous climates

Freewan, A.A., Shao, L. and Riffat, S. (2008) Optimizing performance of the lightshelf by modifying ceiling geometry in highly luminous climates. Solar Energy, 82 (4). pp. 343-353. ISSN 0038-092X

Full text not archived in this repository.

It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing.

To link to this item DOI: 10.1016/j.solener.2007.08.003

Abstract/Summary

The impact of ceiling geometries on the performance of lightshelves was investigated using physical model experiments and radiance simulations. Illuminance level and distribution uniformity were assessed for a working plane in a large space located in sub-tropical climate regions where innovative systems for daylighting and shading are required. It was found that the performance of the lightshelf can be improved by changing the ceiling geometry; the illuminance level increased in the rear of the room and decreased in the front near the window compared to rooms having conventional horizontal ceilings. Moreover, greater uniformity was achieved throughout the room as a result of reducing the difference in the illuminance level between the front and rear of the room. Radiance simulation results were found to be in good agreement with physical model data obtained under a clear sky and high solar radiation. The best ceiling shape was found to be one that is curved in the front and rear of the room.

Item Type:Article
Refereed:Yes
Divisions:No Reading authors. Back catalogue items
Faculty of Science > School of the Built Environment > Construction Management and Engineering > Innovative and Sustainable Technologies
ID Code:35317
Publisher:Elsevier

University Staff: Request a correction | Centaur Editors: Update this record

Page navigation