Man alive, let's get more of these things up and working!
Here's more from a story written by Kiona Smith-Strickland in Popular Mechanics Magazine.
This is not the first attempt to pull clean water out of thin air. In 2011, French company Eole installed a wind turbine in Abu Dhabi, which the company claims generates more than 1400 liters of water each day. The WMS1000 is 24 meters (about 78 feet) tall, and its 13-meter rotor turns at up to 100 rpm to run a 30-kilowatt generator. This in turn powers a cooling compressor inside the turbine. An intake pulls air into the compressor, and moisture condenses out as the air cools. The water runs down into a purification and storage tank at the base of the turbine.
The turbine needs winds of at least 15 mph to generate enough power for the compressor. In a desert climate with an average temperate of 95 degrees Fahrenheit and average relative humidity of about 30 percent, the WMS1000 generates about 350 liters of water a day. In humid coastal climates, production increases to about 1200 liters a day. Adding a solar power unit to the turbine could increase output by a few hundred liters more.
Eole designed the turbine for remote communities of fewer than 5000 people, but when it launched the WMS1000 commercially, in 2012, the price tag for a single turbine was about $660,000, well beyond the budget of most small communities in developing countries.
Back in Lima, the UTEC engineering department and Mayo Publicidad may have found a way to offset the cost barrier: advertising.
Since the billboard's installation, UTEC reports a 28 percent increase in enrollment. Results like that may attract the attention of private companies looking for new ways to advertise. The city of Lima and other urban areas, such as Cairo, Egypt, suffer the same lack of potable water as remote villages, and an advertising-funded solution that taps into an existing electrical infrastructure may work well there. UTEC has not yet announced plans to install more billboards in Lima or to make the technology commercially available elsewhere, but the project has started new discussions about how to provide access to clean water...
(Hat tip: Paul Gregory Richard)