Author(s)

S. Samant (née Mahambrey) & S. Sharples

Abstract

The effect of surface reflectance distributions on average daylight factor values in atrium buildings S. ama ant' (nCe Mahambrey) & S. sharples2 1 School of the Built Environment, University of Nottingham, UK 2 Centre for the Built Environment, Shefield Hallam University, UK Abstract The aim of this research was to study parametrically the effect of different distribution patterns of atrium wall reflectances on average daylight factor values in the well of a square, four-sided, top-lit atrium model that was placed inside an artificial sky. The artificial sky replicated the luminance distribution of a CIE overcast sky. To achieve the variability in reflection distribution, the atrium surfaces were painted in alternating bands of white and black horizontal stripes. 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%. Experiments were also conducted for atrium wall surfaces painted all black (0% wall r

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