Water, Water Everywhere … Pulling Water from Air in Warka Way

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Posted By : ScienceIndia Administrator

The World Economic Forum in 2015 listed water scarcity as the largest global risk in terms of potential impact over the next decade. Two-thirds of the global population (4.0 billion) lives under conditions of severe water scarcity at least one month of the year. Half a billion people in the world face severe water scarcity all year round. Half of the world’s largest cities experience water scarcity.  Recent water crisis encountered in Cape Town is a classic example how the world in future is going to face the water crisis.

One of the abundant sources of fresh water is the Earth’s atmosphere. We can extract water from humid ambient air by condensing the water vapor.  Humidity represents the amount of water vapor present in the air. Water vapor is the gaseous state of water and indicates the likelihood of precipitation, dew or fog. Warka Water - an innovative design that harnesses potable water from air is designed by taking the advantage of air condensation technique. 

Warka Water towers is a vertical structure designed by Arturo Vittori an industrial designer, and his colleague Andreas Vogler,  relies on basic elements like shape and material and the ways in which they work together. The outer housing of each tower is made of lightweight elastic stalks allowing air to flow through. A mesh net made of nylon, hangs inside, collecting droplets of dew that form along the surface. As cold air condenses, the droplets roll down into a container at the bottom of the tower and the water collected in the container then passes through a tube, which can be used.

The first pilot of Warka Tower was built in a rural village of Ethiopia. Finding potable water is a six-hour journey in some parts of Ethiopia. People here spend 40 billion hours a year trying to find and collect water and even when they find it, the water is contaminated. Internal field tests have shown that one Warka Water tower can supply near to 25 gallons of water per day. The important factor in collecting condensation is the difference in temperature between nightfall and day break. The towers are proving successful even in the desert, where temperatures, in that time, can differ as much as 50 degrees Fahrenheit. 

Warka Water towers as claimed by the designers is an inexpensive and easily-assembled structure.  It provides an alternative and local source of water for rural populations that face challenges accessing drinkable water. It can also be used for water stressed or water contaminated areas to provide a decentralized clean potable water.

This innovation won the prestigious World Design Impact Prize at a World Design Capital gala in Taipei. The Warka Water project is recognized for its potential for creating positive social and environmental impact.

Author: S Sumana, 10th Class-E-Section, DPS-Nacharam, Hyderabad

(Image source: http://www.warkawater.org/


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Arham Nimani

This is an amazing invention. The concept is simple and it is quenching the thirst of billions of people in the world

Posted on : 06-04-2018 04:41:59