Paper Conference

Proceedings of Building Simulation 2011: 12th Conference of IBPSA


The ‘adaptive zone’ – A concept for assessing glare throughout daylit spaces

John Alstan Jakubiec, Christoph Reinhart

Abstract: Five glare indices are compared under 144 daylit conditions in three spaces in order to understand the capability of glare analysis to support the design of visually comfortable spaces. It is found that Daylight Glare Probability (DGP) yields the most plausible results in the investigated spaces and lighting conditions as it is based on contrast and total vertical eye illuminance whereas other metrics rely wholly upon contrast. An adaptive visual comfort model, the ‘‘adaptive zone,’’ is proposed by allowing users to change their view direction to avoid discomfort in front of a flexible workspace. It is found that applying the adaptive zone concept to a sidelit office with manually operated venetian blinds can significantly improve predicted occupant comfort and increase the annual daylight availability within the office by 28%.
Pages: 2178 - 2185