Parabolic
Cookers |
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the pictures to see a larger version. |
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Marc Ayats made a parabolic solar cooker by purchasing an umbrella, covering the
inside with ordinary aluminum foil and cutting off the handle (because the
handle would be at the focal point of the reflector — where you must put your
cooking pot). He used ordinary white adhesive to glue the reflective sheet to
the umbrella’s cloth. He says it is a very simple cooker to make because
umbrellas are normally parabolic in shape. He also says it is easy to move — it
folds up like a regular umbrella. The pot is held in place with a wire frame
used for holding flower pots.
Contact: Marc Ayats Plana, C/Pinto S. Abril, No 8, piso 2, 46005 Valencia,
Spain. E-mail:
marquitusus@hotmail.com
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Bender
Bayla is near the northern tip of Somalia and was badly damaged by the 2004
tsunami. Solar cookers are in wide use there.
More info. |
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The Devos cooker is a solar focusing collector, with an open focus. But
many differences and advances are noticeable from the usual parabolic cooker
:
- The cooker is made of two main parts : a table and a concentrator.
- The concentrator reflects and focus the solar rays under the table,
where a hole is made, and where you put the pot.
- The concentrator is asymmetrical. That way, it can collect all the
solar rays. This also allows the table and the pot not to make any
shadow on the concentrator.
- The table protects the cook from burns and dazzles. Even if the
focus move, the table shelters the user and is a safety device to do the
cooking quietly. s
- There are two simple devices used to track the solar position. The
first one allows the control and the tracking of the variation of solar
azimuth. The second one allows the tracking of the variation of solar
altitude.
- A special device can regulate the heat under the pot. A shutter and
an indicator allow the cook to reduce or increase the heat under the
pot.
tablesol@yahoo.fr
http://tablesol.free.fr
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This reflector is formed from clay using the apparatus
shown. |
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The SK-14, a parabolic that has the focus deep inside to
avoid eye damage. |
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A South African woman cooking with an SK1200 cooker. |
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This cooker,
made from sheet metal, was designed and constructed
in the Metal Workshop of Ram Ashish Sharma in Lahan, Nepal. |
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This cooker
was designed by a Chinese government energy research centre. It boils
1 liter of water in good sunshine in 20 minutes in the kettle shown. The
area of the mirror(s) is two square meters. The cooker costs about 100 USD
in Kathmandu, Nepal. |
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A cooker in Lima, Peru. |
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A Fresnel design built by Ed
Norman. |
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A parabolic cooker made from cardboard by the Peru
Children’s Trust. |
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Gilles Guidan is overseeing construction
of what may be the largest single solar cooker in the world: a giant
parabolic dish in the roof of a community kitchen in Auroville, Tamil Nadu.
For inf.: Auroville Building Centre, CSR Auroshilpam, Auroville 605101,
Tamil Nadu, India, tel 413-62168 or 62277, fax 620517,
email: csr@auroville.org |
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A large Scheffler
cooker focuses sunlight onto a heat collector that allows for cooking
inside of this building for large numbers of people |
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Another view of a Scheffler cooker. |
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A
Scheffler cooker in Egypt. |
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