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Office buildings have high standards for lighting requirements, which greatly contribute to high lighting energy consumption. Daylight utilization is one of the means to reduce it. The goal of this paper is to evaluate daylight utilization potentials in Belgrade climate in order to generate initial design guideline for highly glazed small, individual office spaces. Daylight availability and its lighting energy implications are analyzed using computer simulation tool DIVA for Rhino. Selected individual office space is modelled as a narrow rectangular space, sidelit and highly glazed. Parametric analysis was carried out for: four different glazing ratios (50, 60, 70, and 85%), four glazing types with different visible transmittance properties (80, 72, 62, and 54%), and four different major orientations. Since this analysis is evaluating daylight utilization potentials, no shades or external obstructions were considered. The major results of this study indicate high potential for daylight utilization in office buildings in Belgrade. Daylight utilization in single offices is reaching its maximum in model with 70% window-to-wall ratio for all office orientations except north orientation, where daylight utilization is reaching its maximum at maximum window-to-wall ratio. Also, north orientated spaces have highest benefits from utilization of useful diffuse daylight. Direct sunlight and size and shape of façade aperture above working plane are determining factors for utilization of daylight in office spaces.
PAPER REVISED: 2018-03-21
PAPER ACCEPTED: 2018-06-17
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THERMAL SCIENCE YEAR 2018, VOLUME 22, ISSUE Supplement 4, PAGES [S1105 - S1116]
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© 2023 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence