The aim of this research was to examine the influence of atrium geometry and surface reflectance distributions on Daylight Factor at the base of the atrium. Ecotect and Radiance programmes were used to simulate square, four-sided, top-lit atria under overcast sky conditions. To achieve the variability in reflection distribution, surfaces were assigned alternating horizontal bands of white and black. For each of the experiments the widths of these bands were altered but the overall split between white and black bands was always maintained at 50% white and 50% black. Models were built for atriums with a well index of 0.5, 1 and 2. It was concluded that the reflectance distributions influenced daylight levels in the medium and shallow/wide atria however in the tall atrium the reflectance distributions had practically no effect on DF. The impact of reflectance distribution patterns on the daylight factor reduced as the number of bands increased.
|Keywords:||Daylighting, Atrium, Surface Reflectances, Geometry|
Lecturer, Institute of Architecture, School of Built Environment, University of Nottingham, Nottingham, Nottinghamshire, UK
ex-Master of Architecture student, Institute of Architecture, University of Nottingham, Nottingham, Nottinghamshire, UK
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