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Assessment of the impact of Daylighting Systems on Visual Quality of Rooms
Martine Velds and Marinus van der Voorden
Delft University of Technology, Faculty of Architecture Building Physics Section, Berlageweg 1, room 6.50
2628 CR Delft, Netherlands
Abstract
The design of daylighting systems has an impact on the visual quality of a room. In order to evaluate this impact and to establish the quality of the system a Monitoring Protocol has been developed within Task 21 'Daylight in Buildings' of the International Energy Agency. It contains measuring procedures and evaluation methods. However, it does not include the assessment of perceived discomfort glare from windows. For this purpose the Visual Comfort Evaluation method (VCE-method) has been developed at Delft University of Technology.
The method is based on an experimental set-up including a 1:5 scale model of an office room, into which an observer can put his head. Experiments are carried out under artificial sky conditions, in order to create reproducible glaring conditions.
This paper focuses on the assessment of discomfort glare and proposes a procedure based on the combined use of the Monitoring Protocol and VCE method in order to get an insight into the potentiality of daylighting systems to improve the visual quality of rooms.
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