| RSS

Drinking water from air humidity

June 8th, 2009 | 1 Comment | Posted in Solar Power

Even if deserts may seem dry, there is water available in the air. German scientists have now found a way to obtain drinking water from the humidity, and furthermore have based the process on the energy that is vastly available in deserts: the sun. The system uses solar panels as energy source and is therefore autonomous and functional even in abandoned areas.

The principle was inspired by an effect that can be seen in the mountains every day: as the atmospheric pressure there is lower than in the valley, water boils at temperatures distinctly below 100 degrees Celsius.

The recreate this effect in the desert, in the german innovation a saline solution runs down a tower-shaped unit and absorbs water from the air. It is then sucked into a tank a few meters off the ground in which a vacuum prevails. Energy from solar collectors heats up the brine, which is diluted by the water it has absorbed. Because of the vacuum, the boiling point of the liquid is lower than it would be under normal atmospheric pressure.

The evaporated, non-saline water is condensed and runs down through a completely filled tube. The gravity of this water column continuously produces the vacuum and so a vacuum pump is not needed. The reconcentrated brine runs down the tower surface again to absorb moisture from the air.

More Information: Fraunhofer Institute

Leave a Reply 207 views, 1 so far today |
Tags: ,
Follow Discussion

One Response to “Drinking water from air humidity”

  1. Bernardo de Tomás Kutz Says:

    There are obvious benefits, but what are the consequences of extracting moisture from the air?

Leave a Reply