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Improving daylighting performance of mirrored light pipes

Garcia Hansen, Veronica, Edmonds, Ian, & Bell, John (2009) Improving daylighting performance of mirrored light pipes. In Demers, Claude & Potvin, André (Eds.) Architecture Energy and the Occupant's Perspective - The 26th International Conference on Passive and Low Energy Architecture, 22 - 24 June 2009, Canada, Quebec City.

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Abstract

This paper assesses and compares the performances of two daylight collection strategies, one passive and one active, for large-scale mirrored light pipes (MLP) illuminating deep plan buildings. Both strategies use laser cut panels (LCP) as the main component of the collection system. The passive system comprises LCPs in pyramid form, whereas the active system uses a tiled LCP on a simple rotation mechanism that rotates 360° in 24 hours. Performance is assessed using scale model testing under sunny sky conditions and mathematical modelling. Results show average illuminance levels for the pyramid LCP ranging from 50 to 250 lux and 150 to 200 lux for the rotating LCPs. Both systems improve the performance of a MLP. The pyramid LCP increases the performance of a MLP by 2.5 times and the rotating LCP by 5 times, when compared to an open pipe particularly for low sun elevation angles.

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ID Code: 26202
Item Type: Conference Paper
Keywords: Daylighting, Mirror light paper, laser cut panels, passive daylighting collectors, active daylighting collectors
ISBN: 978-2-7637-8939-2
Subjects: Australian and New Zealand Standard Research Classification > BUILT ENVIRONMENT AND DESIGN (120000) > ARCHITECTURE (120100) > Architectural Science and Technology (incl. Acoustics Lighting Structure and Ecologically Sustainable Design) (120104)
Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OPTICAL PHYSICS (020500) > Optical Physics not elsewhere classified (020599)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Design
Copyright Owner: 2009 Les Presses de l'Université Laval (PUL)
Copyright Statement: All rights reserved. No part of this book may be reproduced in any form or by any means electronic or mechanical, including photocopying, recording or by any information storage and retrieval system without prior permission in writing from the publisher.
Deposited On: 08 Jul 2009 12:18
Last Modified: 29 Feb 2012 23:53

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