August 30, 2009

Fun solar cooker from old Satellite Dish

Posted by Jonathan

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August 20, 2009

Solar Heated Water: Create Your Own Evacuated Vacuum Tube

Posted by Jonathan

Awesome videos about evacuated tubes... how you can create your own and how it will heat water to a boiling point using the sun and a mirror.

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August 19, 2009

Evacuated Solar Cooking Pot

Posted by Jonathan

This is a really cool cooking concept that eliminates the need to replace oven bags in solar cooking.

Just take this pot and place it into a funnel of mirrors or a funnel of aluminum and it will easily sterilize or even boil water in direct sunlight.

For project 10 to the 100th my idea is a solar cooking oven that uses double-lined evacuated glass for the cooking food and disinfection of water.

Now all we need is a manufacturer. Anyone have any leads there?

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August 02, 2009

Fantastic Solar Cooker

Posted by Jonathan

Another FANTASTIC solar box-type cooker on YouTube!

He built this from scraps from a construction site. Nice!

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June 09, 2009

Roasting a Marshmallow (with Nothing but the Sun)

Posted by Jonathan

How to roast a marshmallow:

Step 1: Stick marshmallow in center of parabolic cooker.
Step 2: Point parabolic cooker at the sun.
Step 3: Enjoy!

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December 05, 2008

Butterfly Community Solar Cooker from TinyTechIndia

Posted by Jonathan

Community solar cooker

Tiny Tech India has come up with a new version of a parabolic solar reflector called the Butterfly Community Solar Cooker.

According to the web site, it's advantages are:

As there are two equal reflectors - one on each side-, weight is balanced and hence it does not require foundations in the ground. It is mounted on 4 castor wheels and can be revolved and shifted in any direction at any moment even while cooking. In Scheffler Reflector, it is essential to fix the cooker with ground by RCC foundations.

It is not necessary to find out north south direction. In Scheffler Reflector, it is essential to fix north-south line and fit the cooker on that line.

It does not require to install on polar axis. So no latitude of the location is necessary to know. In Scheffler Reflector, it is essential to fix entire structure to revolve around polar axis and hence latitude of the location must be known.

It does not require any seasonal adjustment. In Scheffler Reflector, it is essential to make seasonal adjustment every week.

It is dispatched in dismantled condition and it can be assembled at site very quickly without any expert guidance. So installation staff is not necessary. In Scheffler Reflector, it is essential to send expert person for installation.

100% reflector area is utilized as aperture area as against 70 to 80 aperture area is used in Scheffler reflector. So 8 sq mt butterfly is equivalent to 10 sq mt Scheffler reflector.

Both wings (reflectors) can be folded vertically on hinges very quickly. Hence when not in use, it will occupy very less space.

It can be quickly adjusted against focus by any layman without any training.

The cost of Butterfly cooker of equal capacity is only 50% of Scheffler reflector.

Learn more about TinyTechIndia at http://www.tinytechindia.com

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November 19, 2008

John Grandinetti's Indirect Solar Cooker

Posted by Jonathan

Mr. Grandinetti's oven can be made for about $21 dollars and here's the kicker: he is giving it away. He doesn't want to sell the plans, he wants a company to take it and mass produce it for third world countries so that forests won't need to be cut down for things like cooking fires. A noble idea indeed. It will be interesting to see if any company, anywhere steps up and takes him up on his offer.

John Grandinetti is a solar contractor out of Honolulu, and the owner of Grand Solar Inc. This isn't his first foray into the solar cooking/pasteurization field. He also has created similar devices for the purpose of pasteurizing water in the late 90's for third world installations in Tanzania and Guatemala.