The
high-rise tower pulls dirt, grease and bacteria out of the air. The cleansing
reaction is triggered by the use of a nano coating of titanium dioxide (TiO2)
on the outer skin of the tower. TiO2 is a very strong oxidation agent triggered
by a photocatalyst reaction.
During
the day the reaction is naturally powered by sunlight acting on the titanium
dioxide skin. At night the reaction is maintained by a series of ultraviolet
lights that are powered by energy collected from photovoltaic panels during the
day.
Glowing indigo object
The
tower will be a glowing indigo object at night varying in intensity according
to the amount of solar energy collected during the day. The indigo glow will
become symbolic of the 24-hour cleansing; counteracting the haze that often
dominates more and more cities around the world.The
tower
is split into three bars to increase the amount of surface area, provide
southern light to the south face of each bar, and focus and increase wind
speed. The added surface area allows for maximizing the amount of titanium
dioxide that can be placed on the building—enhancing the amount of air being
cleaned.
The
focused and increased wind speeds maximize the amount of air pushed across the
titanium dioxide panels, provide cross
ventilation
for
every unit in the towers, and power a series of vertical wind turbines.
Positive pressure is created on the southern face of the towers and the
resulting negative pressure on the northern façades creates optimal conditions
for cross-ventilation. Careful attention has also been placed to prevent the
backflow air from one unit into another. The nano coating has the added benefit
of neutralizing bacteriological contamination.
The
skin design is inspired by the pocketed and cellular texture of the TiO2
molecule. A series of organic cells cover the building and are tapered to
naturally collect the water, a byproduct of the skin’s chemical reaction, and
to collect and slowly release rainwater.The
skin
pulls off of the building on the south façades to provide natural shading and
pushes into the inner skin of the north façade to maximize daylight.
Public gathering places
A series of gardens are located at
regular intervals all the way up the tower. They become public gathering spaces
as well as marsh lands to collect the water from the chemical reactions of the
skin and to filter and process gray water from the towers. The plants also turn
the carbon dioxide, created in the chemical reaction of the skin, back into
oxygen.
It is
paramount to have the plants help maintain the base-level carbon neutrality. A
large pool around the base of the tower is the final collection point of the
filtered water, which goes to support a large amount of animal and plant life.
Water is also pumped back up the towers from the pool to service toilets.
Furthermore, the pool at the base acts as a heat sink for the release of the
heat generated from a back-up air-conditioning system. Here, the heat is
released slowly, thus helps reduce the heat island effectIf all the buildings in a central business
district followed the indigo technology, airborne pollution could be
drastically reduced by up to 80 percent. Mere neutrality is not enough—new
buildings must work together to enhance the quality of the physical environment.
The lO team is currently working with manufacturers to construct a mockup of
the skin for further testing.
The research projects are used as a means
to advance sustainable designs within the firm
and the
results are often incorporated directly into current projects. Beyond the
obvious environmental benefits, lO has realized the commercial value of
advanced green technology. The sustainable technologies are catching on
especially well in large-scale residential projects because they bring a better
value to the individual units and gain tax credit from local governments.