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A new device created by researchers at the King Abdullah University of Science and Technology in Saudi Arabia can purify water through solar power. While there have been previous attempts to merge solar power and clean water, the scientists say they have developed a new three-stage system that radically increases efficiency.
The need to combine water purification through clean means is a growing one, giving the rise in man-made climate change. Water scarcity is increasing throughout a variety of places on the planet, from South Africa to India. "The water-energy nexus is one of the main issues threatening sustainable global development," says Wenbin Wang, a Ph.D. student at the University's Water Desalination and Reuse Center, in a press statement.
To combat the problem, the KAUST team looked at solar panels holistically. Silicon solar panels take in around 20 percent of the light they absorb, converting them into electricity. While that number is increasing, scientists predict that no photovoltaic (PV) panel will be able to absorb more than around 27 percent of the light. That leaves a significant amount of light being reflected, which generates heat.
The team, led by Professor Peng Wang of the Reuse Center, looked to put that heat to work.
"The PV panel generates a lot of heat, and the heat is considered a headache in PV,” Wang tells Cosmos. "The uniqueness of the device lies in its smart and effective use of the waste heat of the PV as a resource, which leads to its high efficiency in both electricity and fresh water production."
To capture the heat, the team built out a stack of water channels, separated by porous hydrophobic membranes and heat conduction layers. These layers were attached to the bottom of a commercial PV panel. Heat from the panel would vaporize seawater in the top channel, cross through the porous membrane, and then finally condense as fresh water in the third channel.
The team also put the vapor of the seawater to use. A thermal conduction layer to the next seawater channel would collect its heat, allowing the machine to recycle that energy and create even more fresh water.
In tests, the team was able to generate up to 1.64 liters of water per square meter of solar panel surface every hour.
“In a sense, it utilizes solar energy to a much fuller capacity,” Wang tells Cosmos.
The next step for the team is to try and expand its project to the extent that it would be viable for agriculture. Many innovations in agriculture, like vertical farming, attempt to save water. Being able to use saltwater for farms could radically change how water is consumed around the world. In the U.S. alone, farming represents approximately 80 percent of the country's consumptive water use.
"Raising sheep in the field of PV farms is feasible because grass grows well using the fresh water from solar-panel washing," Wenbin says in the press statement. "A PV farm with sheep grazing while seawater is desalinated using our device could be ideal in arid regions near the coast."
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So, muss mich hier wieder mal zu Wort melden und ein Lob an die Organisatioren der Homepage ausstellen. Sehr geplegt und mit guten Inhalten versehen.... Macht weiter so....
Dann hätte ich noch einige Anträge:
- Verlegung der Weihnachtsfeier auf einen Tag an dem ich Zeit habe
- den nächsten Stammtisch auch mal in Erlangen veranstalten
- mehr Aktivität hier im Gästebuch
Na vielleicht finden meine Anträge ja Gehör beim Vorstand:-)
Gruß Matthias
Die Homepage finde ich gut!!!
PAUL AUS AMBERG
!!! Auf eine erfolgreiche Saison !!!
!!! WIR SIND DER CLUB !!!
Klasse Grillfest:)
Super Bilder:)
!!! WIR SIND DER CLUB !!!
Lieber Ex-Präsi,
leider ging das alles ohne Mail an Dieter:)
Er wollte mich sogar als Beirat in die Bezirksvorstandschaft,
hab nen aber abgesagt, weil ich meine Freizeit lieber für die CLUBFREUNDE VILSECK opfere:)
Da richtet der Fanclub Pavelsbach die Jahreshauptversammlung des Bezirks aus, und im Artikel ist nur von den Clubfreunden Vilseck die Rede:-)....
Schriftführer, hast Du die Verantwortlichen des Fanverbandes erpresst, oder wie?! Gingen wahrscheinlich wieder einige Emails an Dieter Altmann voran;-).... Weiter so Bruderherz.......
http://www.fanverband.com/index.php?id=649
Servus Freunde:)
morgen wird der Klassenerhalt gefeiert in der Hütte:)
!!! AUF GEHTS CLUB !!!
So liebe Freunde des ruhmreichen FCN. Morgen ist es soweit. Da werden wir den FC Größenwahn mal wieder putzen müssen. Hilft nichts, die 3 Punkte brauchen wir.....
Und der Finsterer wäre die nächsten Wochen auch mal wieder ruhig:-)
