Solar Powered Oven Produces Clean Water

 It produces enough fresh water for a single individual. Any wastewater could also be used of course.
The two vessels are stilled connected with manufactured tubing andthe top container need to be sealed to produce pressure. It would bebetter to do something clever and cheaper than what is shown here.
Black enameled metal will also work well and producing an invertedbowl for the bottom of the container will reduce the total volume andgenerally allow more fluid to be in contact with hot metal. Thebottom container is not so nearly ctritical and could easily be anystandard basin basin and the cone a metal lid with a formed lid tohold inside the basin's edge.
We have already established that the volume will be a gallon per dayso there is no reason to allow a volume greater than that in the topdevice.
This is certainly a welcome idea.
Solar-powered ovenmakes fresh water
By DavidSzondySeptember 9, 2012
The Eliodomesticocosts US$50 to build (Image: Gabriele Diamanti)
http://www.gizmag.com/eliodomestico/24058
Sometimes the simplestideas are the best. Concerned about the lack of fresh water in thedeveloping world, designer Gabriele Diamanti wanted a solution todesalinate water that was available to households rather than relyingon giant, centralized plants. He also wanted it to be somethinginexpensive that could be made by local craftsman. The result is aceramic solar still called the Eliodomestico that operates like an“upside-down coffee percolator”.
The open-source designof the Eliodomestico is remarkably simple. It consists of two ceramicpieces that sit one atop the other. Inside the top piece is a blackcontainer into which salt water is poured. The sun heats thecontainer, turning the water to steam. As pressure builds, the steamis forced down a tube into a container in the lower piece. There itcondenses against the lid and collects in the basin of the container.
The Eliodomesticocollects about five liters (1.09 gal) of fresh water per day andcosts about US$50 to build with no operating costs. The bottomcontainer’s basin is designed to be transported on the head, whichis a common practice in developing countries.
The design was afinalist at Prix Emile Hermès competition 201, received specialmention at the Well-Tech Award 2012 and was the pro winner of theCore77 Design Awards 2012, social impact category.