The developers behind the concept claim to have built a prototype to test their theory and have also conducted feasibility studies into upping the scale of their device to produce economically viable levels of water and power.
Using three proven technologies ? water vapor condensers, hydroelectric generators, and airships ? the Air HES (HydroElectric Station) is planned to be released up to a level of around 7,000 ft (2,100 m) to reach the mid-level clouds in the troposphere. Once there, it will use a large curtain of vapor-condensing mesh (similar to the system developed by MIT) to collect water.
The water collected from this process will then be released down a lightweight pipe attached to the balloon, where it will provide a significant head of pressure on its way to the ground. Large enough, the creators say, to provide more than enough energy to rotate the turbine on an electric generator and generate electricity.