Conference paper Open Access

Light distribution and glare prevention performance of a complex fenestration system: A simulation based evaluation

Paulína Šujanová; Jozef Hraška

In this paper, performance evaluation of a complex fenestration system is presented, using Radiance based 
computer simulation.  This is done on an office model space with integrated double transparent facade, with 
complex geometry of each facade layer. To evaluate the ability of the CFS to distribute the light in the interior 
space and to prevent glare, illuminance distribution in the office space has been calculated for three critical 
days: (1) March 21 st  –  equinox, at 12:00 PM which for 48°latitude corresponds to sun elevation angle of 
approximately 40°; (2) June 21 st – summer soltice, at 12:00 PM which corresponds to sun elevation angle of 
approximately 63°; December 21 st – winter soltice, at 12:00 PM which corresponds to sun elevation angle of 
approximately 17°.  This was done for three states of the CFS:  (a)  facade model with no blinds applied; (b) 
facade model with blinds applied with 0° slat tilt; (c) facade model with blinds applied with 45° slat tilt. The 
results are drawn in regards to the requirements of the draft standard prEN 17037 Daylight in buildings.

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