getting water from air

in 2011 an Australian inventor won the James Dyson Award for a device that cools the air using underground coils, so you only need enough energy to pump the air down a pipe.

Another low energy technique is that used in the Atacama Desert in Chile, and is basically just a piece of mesh strung between two poles, with a trough under it. They get a fog too, and as it flows through the mesh, drops of water condense and run down into the trough.

But NBD Nano claim that the beetle’s skin is several times more efficient than the Chilean method. So far they claim a square metre of beetle-inspired material, at 21 °C and 75% relative humidity, can produce 3 litres of water per hour.

Energy is still used to blow air across the collector,

Notes:

lostinscience.wordpress.com/2012/12/08/how-to-make-a-self-filling-water-bottle/

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