Abstract
Applying active occupant engagement into a responsive façade concept leads us to a transition from the façade regulatory function to the interactive phase. The Interactive facade has the capacity for hierarchically filtering daylight and real-time control, and preventing daylight discomfort. This research applied the combination of qualitative and quantitative methods for studying innovative daylight guide systems functions, relation with building forms and development of kinetic façade forms as advanced real-time daylight control. Literature referred to the responsive modular elements which can be adapted to dynamic daylight by continuously changing façade configurations. In particular, parametric decentralized façade's apertures interact with sun radiation based on relationship between external environment, interior space and occupant position as well. In this study, we develop a kinetic interactive façade with the capability to be transformed based on dynamic daylight and occupant position (functional scenario based) in order to meet visual comfort. Also, daylight parametric simulation investigates visual comfort performance provided by the kinetic façade forms through climate based daylight metrics. The simulation results prove high performance of the kinetic interactive facades for improving visual comfort regarding the base case. In particular, the three dimensional shape changes façade provides more visual comfort improvement than the two dimensional shape changes one regarding UDI, Exceed UDI and DGP metrics. Also, the results refer to multifunctional aspects of the three dimensional shape changes façade, as an advanced interactive daylighting system, which has a capability to control solar radiation in the facade ambient environment for preventing thermal discomfort.
Highlights
Natural light provides positive psychological, mental and physiological effects on building occupants [1,2,3,4]
The architectural form of a building defines the façade's interaction with the ambient environment, which has a fundamental effect on admitted useful daylight into interior spaces
Kinetic facades are classified in responsive and automatic cases, the responsive ones have capabilities to be adapted to the dynamic daylight using real-time shape changes mostly in the mild temperate regions (Csa) and warm deserts (Bwh)
Summary
Natural light provides positive psychological, mental and physiological effects on building occupants [1,2,3,4]. There are some issues such as heat gains and visual discomfort (daylight glare) that should be considered to obtain visual comfort. Enhancing the useful daylight of interior spaces, as much as possible, has been considered an important goal for architects, building engineers and designers. Since “nature is always in motion, never at a standstill” [6], Balancing visual comfort and taking advantage of daylight is always challenging [2,4,7]; because of the need to study the relationship between human needs and natural lighting based on specific factors such as: amount of light, uniformity of light, quality of light in rendering color, and the risk of glare for occupants” [3,8,9,10]
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