aedas: al bahar towers

International practice aedas is nearing completion of the ‘al bahar towers’ for the abu dhabi investment council headquarters in abu dhabi,
that utilize what is perhaps the largest and most advanced interactive sun-shading skin system. the two 25-storey office towers are
parametrically designed based on islamic geometric mosaics, using the tessellation of simple shapes to drive the structure.
the cylindrical forms maximize volume and floor-to-wall area while offering views in all directions, unfortunately however,
this also opens the interior to a very large solar gain factor which is a substantial problem in the extreme local climates.

Reinterpreting the traditional wood-lattice screens called ‘mashrabiya’ using today’s technological abilities resulted in an outer skin
system of triangular screens arranged in a series of scalable hexagons fold up to create a solid solar barrier. each of the 1000 panels
is connected to a linear actuator which enables it to function in response to the position of the sun, effectively reducing heat gain and
glare by 50% while giving islamic vernacular a contemporary representation. the intelligent facade, together with solar thermal panels
for hot-water heating and photovoltaic panels on the roof, minimize the need for internal lighting and cooling, altogether reducing total
carbon dioxide emissions by over 1750 tons per year.

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