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#Post#: 1097--------------------------------------------------
Water from the air cheaply WITHOUT FOSSIL FUELS
By: AGelbert Date: May 11, 2014, 9:54 pm
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[center]Greentechnology Spotlight: Collect Water From the
Air[/center]
SustainableBusiness.com News
We have all heard about how difficult it is for people to
access clean water in many developing countries, with people
walking miles every day to collect some.
All sorts of low-tech technologies have been developed, from
people riding bicycles to pump water to Bill Gates's famous
toilet that converts wastewater to drinking water. Most of them
don't work in the end because either they are too complicated,
or require people to find a water source.
The Smithsonian published an article on an inspiring invention
that just might work - it literally draws water from the air.
[img width=30
height=40]
HTML http://www.createaforum.com/gallery/renewablerevolution/3-141113185047.png[/img]
Developed by industrial designers Arturo Vittori and Andreas
Vogler, Warka Water can collect over 25 gallons of clean
drinking water each day. It looks like a 30-foot-tall vase and
every detail has a function.
[center][img
width=640]
HTML http://www.sustainablebusiness.com/imageupload/water-final.jpg[/img][/center]
[center][img
width=640]
HTML http://www.detail-online.com/uploads/pics/IMG_9657_02.JPG[/img][/center]
Warka Water Vase
Smithsonian explains it this way:
"The rigid outer housing of each tower is comprised of
lightweight and elastic juncus stalks, woven in a pattern that
offers stability in the face of strong wind gusts while still
allowing air to flow through. A mesh net made of nylon or
polypropylene, which calls to mind a large Chinese lantern,
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. The water in the container
then passes through a tube that functions as a faucet, carrying
the water to those waiting on the
ground."
HTML http://dl6.glitter-graphics.net/pub/57/57396kkkx0l656b.gif<br
/>
[center][img
width=640]
HTML https://deborahsmall.files.wordpress.com/2011/09/mg_1694.jpg[/img][/center]
[center]Gathering Juncus stalks[/center]
[center][img
width=497]
HTML http://deborahsmall.files.wordpress.com/2009/10/juncus_twine_abe_luis_1814.jpg[/img][/center]
[center]Juncus textiles[/center]
Even in the desert, the tower works because condensation occurs
based on the difference in temperature between nightfall and
daybreak, where they can vary as much as 50 degrees F, Vittori
says. [img
width=70]
HTML http://renewablerevolution.createaforum.com/gallery/renewablerevolution/1/3-250718204746.gif[/img]
It's easy to clean and can be erected in about a week without
special tools. And at $500, it's less than a quarter of the
price for a Gates toilet.
Vittori is looking for an investor to mass produce Warka Water
towers.
HTML http://www.sustainablebusiness.com/index.cfm/go/news.display/id/25700
#Post#: 9385--------------------------------------------------
Re: Water from the air cheaply WITHOUT FOSSIL FUELS
By: AGelbert Date: March 26, 2018, 1:42 pm
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[center]This new device can draw water from desert air
At humidities as low as 10% [img
width=50]
HTML http://www.pic4ever.com/images/19.gif[/img]
[/center]
By Rob Thubron on Mar 23, 2018
Researchers have developed a device that can draw water from
even the driest desert air. Scientists from MIT and UC Berkeley
have field-tested the invention, which improves on a concept
design from last year, in Tempe, Arizona, proving the potential
of the method.
When it was first proposed in a Science article last year, the
paper drew a lot of attention—not all of it good. "It got a lot
of hype, and some criticism," said Professor Evelyn Wang, who
worked on both studies. “All of the questions that were raised
from last time were explicitly demonstrated in this paper. We've
validated those points.”
Most methods of drawing water from air require humidities of
over 50 percent and lots of energy to work, but the improved
design can extract potable water at humidities as low as 10
percent and is solar-powered. 🌞
“This has no moving parts. It can be operated in a completely
passive manner in places with low humidity but large amounts of
sunlight
HTML http://dl3.glitter-graphics.net/pub/465/465823jzy0y15obs.gif,”<br
/>said researcher Sameer Rao.
The device is based on a type of high-surface-area, super-porous
material called metal-organic framework (MOF). The MOF in this
device can extract water from the air during the night and store
it in its pores. The water is released during the day using
sunlight.
[center]
HTML https://youtu.be/dvwmZKqPgKQ[/center]
By testing the device on the rooftop of an Arizona State
University building, the team "was field-testing in a place
that's representative of these arid areas, and showed that we
can actually harvest the water, even in subzero dewpoints."
Researchers say that the device’s output is estimated to be more
than a quarter-liter of water per day per kilogram of MOF, and
no impurities were found during testing. If scaled up and made
more efficient, that yield could be tripled. "We hope to have a
system that's able to produce liters of water," said Wang.
HTML https://www.techspot.com/news/73850-new-device-can-draw-water-desert-air.html
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