The Walden Effect: Farming, simple living, permaculture, and invention.

Diy solar powered refrigerator

  diy solor powered refrigerator
Emily Cummins is a 21 year old student/inventor who has come up with a clever and simple way of using the sun to cool things like perishable food and temperature sensitive medications. The concept works with no electricity and can be built with materials like cardboard, sand, and recycled metal.

It takes advantage of conduction and convection to create an evaporative cooling effect. You place what you want to keep cold in the interior chamber and either some sand, wool, or soil in the outer chamber that gets saturated with water. The sun warms the water soaked material...the water evaporates, reducing the temperature of the inner area to 43 degrees Fahrenheit for days at a time. To recharge you only need to add more water once your material gets dry.



Anna Hess's books
Want more in-depth information? Browse through our books.

Or explore more posts by date or by subject.

About us: Anna Hess and Mark Hamilton spent over a decade living self-sufficiently in the mountains of Virginia before moving north to start over from scratch in the foothills of Ohio. They've experimented with permaculture, no-till gardening, trailersteading, home-based microbusinesses and much more, writing about their adventures in both blogs and books.



Want to be notified when new comments are posted on this page? Click on the RSS button after you add a comment to subscribe to the comment feed, or simply check the box beside "email replies to me" while writing your comment.


This is like the evaporative coolers they use to air condition houses in the southwest and other dry climates. It doesn't work in a humid area.
Comment by Errol Sun Aug 2 21:01:52 2009
That's exactly what Mark and I were talking about last night! He knows all about swamp coolers and suspected the same thing....
Comment by anna Mon Aug 3 07:31:38 2009





profile counter myspace



Powered by Branchable Wiki Hosting.