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Saturday, May 17, 2014
By Brad Reed
May 16, 2014 9:45 PM
Living in the desert no longer has to mean being parched for drinking water. MIT
has posted a video this month that shows how some researchers from its
School of Engineering are working with researchers at the Pontificial
University of Chile in Santiago to design a system for collecting fresh
drinking water from fog that regularly rolls through Chile’s otherwise
arid coastal region.
The researchers created a series of suspended mesh
structures that they’ve strategically placed on top of hills and angle
toward locations where fog typically blows in from the ocean. As the fog
comes through, the webbing in the structures captures small droplets of
water and filters them down into a collection silo. While the
scientists have mastered the basics of capturing water from fog with
this kind of mesh structure, they’re now experimenting with changing the
“variations in the mesh spacing as well as the size and the wettability
of the fibers in the mesh” to maximize its efficiency.
MIT estimates that there is
around 10 billion cubic meters of potential fog water produced every
year along the Chilean coast and it says its goal is to harvest at least
4% of it, which could provide drinking water for the entire region.
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