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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/19770

Title: The sunlight beam index
Authors: Mardaljevic, John
Roy, N.
Issue Date: 2016
Publisher: © The Authors. Published by SAGE Publications
Citation: MARDALJEVIC, J. and ROY, N., 2016. The sunlight beam index. Lighting Research and Technology, 48(1), pp.55-69.
Abstract: This paper describes a fundamental rethinking of the basis for the evaluation of the sun- light potential of spaces. It provides a robust methodology to answer the question: how much sunlight can enter a room? The measure proposed is the cross-sectional area of beam sunlight that passes through a window. The new measure { called the sunlight beam index { is described, and examples are given for a realistic residential dwelling. The sunlight beam index is determined for a full year on a time-step basis (e.g. every 15 minutes), but it can be aggregated into monthly or yearly totals. The annual total provides a single measure for: one window; a group of windows; or, all the windows for an entire dwelling.
Description: This paper was accepted for publication in the journal Lighting Research and Technology and the definitive published version is available at http://dx.doi.org/10.1177/1477153515621486
Version: Accepted for publication
DOI: 10.1177/1477153515621486
URI: https://dspace.lboro.ac.uk/2134/19770
Publisher Link: http://dx.doi.org/10.1177/1477153515621486
ISSN: 1477-1535
Appears in Collections:Published Articles (Civil and Building Engineering)

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