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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
The Impact of Occupant Behavior on Daylight Performance of an Office Room in a Tropical Climate
Author(s)
Juliana Portela Vilar de Carvalho, Viviane Diniz Hazboun, Allyson Santos Carvalho and Aldomar Pedrini
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DOI:10.17265/1934-7359/2018.03.003
Affiliation(s)
Departamento de Pós-graduação em Arquitetura e Urbanismo, Universidade Federal do Rio Grande do Norte (UFRN), Natal, 59079970, Brazil
ABSTRACT
This work explores three
patterns of occupants’ control of window blinds and the potential influence on
daylight performance of an office room in a tropical climate. In this climate,
windows are frequently obstructed by curtains to avoid glare, despite the
daylighting and the exterior view. The consequences are obstructed outside
view, poor daylight quality and dependency on artificial lighting. This paper
assesses the impact on available daylight using parametric analysis based on
daylighting dynamic computer simulations using Grasshopper and Daysim
software, combining WWR (window-to-wall ratio) (40% and 80%), SVF (sky view factor) (small and large) and
occupant behavior (active, intermediate and passive users). The user patterns
are based in an office buildings survey that identifies preferences concerning
daylight use and control of shading devices. The daylight performance criteria
combine UDI
(useful daylight illuminance)
(500-5,000 lux) and illuminance
uniformity distribution. Results confirm the impact of occupant behavior on
daylighting performance. The optimum combination of external shading devices,
high SVF and high window size results in a useful daylighting for 1/3 of the
time for passive users and 2/3 for active users.
KEYWORDS
Daylighting, occupant behavior, fenestration systems.
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