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In non-residential buildings, comfort and energy demand for heating, cooling and lighting are significantly influenced by the façade. Up to now, only non-weighted luminance-based methods for calculating and evaluating annual daylight glare exist (Lee et al., 2005; Mardaljevic and Lomas., 1998). Within this paper, different methods based on the daylight glare probability DGP (Wienold and Christoffersen, 2006) for a dynamic calculation of glare are discussed and evaluated:
1. Timestep by timestep calculation –RADIANCE reference method.
2. Simplified daylight glare probability DGPs –DGP only based on vertical eye illuminance. Results of this method are similar to average luminance based evaluations.
3. Enhanced simplified DGP calculation - DGP based on vertical eye illuminance and simplified images.
The enhanced simplified DGP method is validated against two hour-by-hour full year calculations, using a fabric and a Venetian blinds shading system.For the yearly evaluation of dynamic glare results, a histogram analysis and a glare rating classification is proposed.