Drinking Water From Air Humidity
Source : ScienceDaily (June 8, 2009) Not a plant to be seen, the desert ground is too dry. But the air contains water, and research scientists have found a way of obtaining drinking water from air humidity. The system is based completely on renewable energy and is therefore autonomous.
Research scientists at the Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB in Stuttgart working in conjunction with their colleagues from the company Logos Innovationen have found a way of converting this air humidity autonomously and decentrally into drinkable water.
The principle of the process is as follows : hygroscopic brine - saline solution which absorbs moisture - 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.
"The concept is suitable for various sizes of installation. Single-person units and plants supplying water to entire hotels are conceivable," says Egner. Prototypes have been built for both system components - air moisture absorption and vacuum evaporation - and the research scientists have already tested their interplay on a laboratory scale. In a further step the researchers intend to develop a demonstration facility.
Page publiée le 24 juin 2009, mise à jour le 2 août 2014