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Post occupancy evaluations relating to discomfort glare : a study of green buildings in Brisbane

Hirning, M.B., Isoardi, G.L., Coyne, S., Garcia Hansen, V.R., & Cowling, I. (2013) Post occupancy evaluations relating to discomfort glare : a study of green buildings in Brisbane. Building and Environment, 59(Jan), pp. 349-357.

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Abstract

Glare indices have yet to be extensively tested in daylit open plan offices, as such there is no effective method to predict discomfort glare within these spaces. This study into discomfort glare in open plan green buildings targeted full-time employees, working under their everyday lighting conditions. Three green buildings in Brisbane were used for data collection, two were Green Star accredited and the other contained innovative daylighting strategies. Data were collected on full-time employees, mostly aged between 30 and 50 years, who broadly reflect the demographics of the wider working population in Australia. It was discovered 36 of the 64 respondents experienced discomfort from both electric and daylight sources at their workspace.

The study used a specially tailored post-occupancy evaluation (POE) survey to help assess discomfort glare. Luminance maps extracted from High Dynamic Range (HDR) images were used to capture the luminous environment of the occupants. These were analysed using participant data and the program Evalglare.

The physical results indicated no correlation with other developed glare metrics for daylight within these open plan green buildings, including the recently developed Daylight Glare Probability (DGP) Index. The strong influence of vertical illuminance, Ev in the DGP precludes the mostly contrast-based glare from windows observed in this investigation from forming a significant part of this index. Furthermore, critical assessment of the survey techniques used are considered. These will provide insight for further research into discomfort glare in the endeavour to fully develop a suitable glare metric.

Impact and interest:

5 citations in Scopus
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5 citations in Web of Science®

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ID Code: 54457
Item Type: Journal Article
Keywords: Discomfort glare, Luminance mapping, POE, Green Buildings, Office lighting, Open plan
DOI: 10.1016/j.buildenv.2012.08.032
ISSN: 1873-684X
Subjects: Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OPTICAL PHYSICS (020500) > Optical Physics not elsewhere classified (020599)
Australian and New Zealand Standard Research Classification > BUILT ENVIRONMENT AND DESIGN (120000)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Schools > School of Design
Current > QUT Faculties and Divisions > Creative Industries Faculty
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 Elsevier Ltd.
Copyright Statement: This is the author’s version of a work that was accepted for publication in the journal, Building and Environment. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Building and Environment, Volume 59, January 2013, Pages 349–357. DOI: 10.1016/j.buildenv.2012.08.032
Deposited On: 01 Nov 2012 09:27
Last Modified: 07 Feb 2014 00:03

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