Design, fabrication and computational simulation of a bio-kinetic facade inspired by the mechanism of the Lupinus Succulentus plant for daylight and energy efficiency

Designing a facade that is able to keep the balance between the daylight, view out and energy load is a challenge. The present paper aims to use the sun's radiant energy utilizing the facade as the outer skin, which is in contact with the surroundings to reduce nonrenewable energy consumption and provide comfort to occupants. Using bionic science, a kinetic facade prototype was designed and fabricated with Lupinus Succulentus plants' movement mechanism, a type of sun-tracking plant. This kinetic facade has been simulated by Grasshopper on the facade of the Southern side of an open office in Tehran. Accordingly, this study is to investigate a bio-kinetic facade, using the integration among kinetic architecture, biomimicry and occupants' visual and thermal comfort. Bio-kinetic facade not only causes cooling load reduction by approximately 7% but also prevents the direct light entry, resulting in electric lighting load's reduction by about 48%, which was calculated by Honey bee and Ladybug plugins.