[Stoves] Others may know this but it new to me WILSON SOLARCOOKER

[Dean Still]

Hi All,

Let's say, as rules of thumb (definition: wrong but tend to work anyway),
that there are 250 BTUs in a square foot of sunshine per hour.

There are approximately 8,600 BTU in a pound of wood. Stored solar energy!

So it takes a solar cooker with about 34 square feet of intercepted
sunlight to equal the cooking power of one pound of wood burned in one hour.

The intercepted sunlight would be about 6' by 6'. About 1/3 of the energy
would cook the food and 2/3 would do other less useful things.

Give or take: 3,000 BTU would boil 2 gallons of water in about an hour.

In my experience, solar cookers are great if they are big enough to do the
cooking task! We used them every summer to cook lunch and dinner for 20
people and it was really nice to have a no fuss cooker that needed almost
no tending and did not increase entropy. It was great not to deal with a
hot fire on summer days. At the Aprovecho farm we used stored solar energy
in the winter and direct solar energy in the summer for cooking, heating
water, etc.

Best,

Dean


On Thu, May 15, 2014 at 7:07 AM, Michael N Trevor <mtrevor at ntamar.net>wrote:

>   Theoretically its still a good idea.  I actually toyed with a similar
> idea using “stored”chemical heat in an insulated box to maintain warmth in
> a incubator box to transport bird eggs.
>
> Michael N Trevor
> Marshall Islands
>
>
>
>   *From:* Erin Rasmussen <erin at trmiles.com>
> *Sent:* Wednesday, May 14, 2014 9:49 AM
> *To:* 'Discussion of biomass cooking stoves'<stoves at lists.bioenergylists.org>
> *Subject:* Re: [Stoves] Others may know this but it new to me WILSON
> SOLARCOOKER
>
>
> Unfortunately the Wilson Solar Cooker doesn't actually exist.  That's an
> image of ladies cooking over a regular 3 stone fire that's been altered
> with Photoshop to look like they are using a solar cooker.  It fooled me a
> few years ago.
>
>
>
>
>
> Kind regards,
>
> Erin Rasmussen
>
> erin at trmiles.com
>
>
>
> *From:* Stoves [mailto:stoves-bounces at lists.bioenergylists.org] *On
> Behalf Of *Michael N Trevor
> *Sent:* Wednesday, May 14, 2014 5:39 AM
> *To:* Discussion of biomass cooking stoves
> *Subject:* [Stoves] Others may know this but it new to me WILSON SOLAR
> COOKER
>
>
>
>
>
> Fresnel lens heat storing solar over   WOW
>
>
>
>
> http://www.wesupportorganic.com/2014/01/newly-invented-off-grid-solar-grill-can-store-energy-and-cook-at-night-without-electricity.html
>
>
>
>
>
> THANK YOU SAI BHASKAR REDDY NAKKA.
>
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