daylighting simulation, new framework, dynamic shading devices
Daylight plays an important role in building design. It affects occupant’s activities, reduces energy demand and supports human health. Most of daylighting simulation software does not capture occupant’s behavior or shading’s dynamic behavior. Daysim is the only one that calculates dynamic shading devices by using lightswitch model but it has limitation. It is unable to use other automated control algorithms or capture occupant’s behavior and is also unable to simulate advanced shading devices which can only be described by bidirectional distribution function such as light redirecting films. A new framework was developed based on Radiance three-phase method to enable the capability of accurate annual daylighting simulation in a room equipped with dynamic shading devices and/or daylight redirecting devices. Two case studies are carried out using Hanoi climate to demonstrate the ability of the framework. It also considers automated shading control which allows future smart building applications. The framework is flexible to run any automated control algorithms and any dynamic behaviors from occupants. In the future, the framework will be expanded to run Radiance five-phase method.