[Stoves] solar cooker response (changing thread name)

[Dr. Dieter Seifert]

Dear Stovers,

A source of confusion concerning solar cookers is the large variety of 
devices, all of them called "solar cookers". At the Plataforma 
Solar/Almeria/Spain there was an International Solar Cooker Test by 
Eurpoean Committee for Solar Cooking Research in 1994 with 25 
participating devices. One of them did not cook at all; the SK parabolic 
cooker (1.4 m reflector diameter) brougt 48 liters of water to the boil 
per day. Some cookers had direct access to the pot, others not. Some 
were only applicable for special tasks, etc.

Thus, general judgments are problematic. Solar cooking is a great 
opportunity with a high variety of applications. Problems can be 
overcome, but persistence is necessary, similar e.g. to the development 
of bicycles.

Kind regards,
Dieter


Am 14.06.2017 um 03:46 schrieb Michael N Trevor:
> Here in the Marshall Islands, the another science teacher wanted them 
> thrown away because they were bulky and had no value in classes 
> centered on environmental science and climate change. Of course we are 
> only about 2/3 meters above sea level
>
>
> On Wed, Jun 14, 2017 at 1:01 PM, Crispin Pemberton-Pigott 
> <crispinpigott at outlook.com <mailto:crispinpigott at outlook.com>> wrote:
>
>     Nikhil
>
>     Let's not assume anything.‎ These were the findings of the study
>     which was a multi-year attempt to find out if there was any long
>     term reason to get involved in the promotion of solar cookers.
>
>     The conclusion was, no. ‎And they swore them off. For them, if
>     they had a chance anywhere that was the ideal place, and it was
>     not viable.
>
>     Very sane.
>     Crispin
>
>
>
>     Crispin;
>
>     You have listed enough reasons to dispute the sanity of GIZ experts.
>
>     Nikhil
>
>
>
>
>     On Jun 13, 2017, at 11:35 AM, Crispin Pemberton-Pigott
>     <crispinpigott at outlook.com <mailto:crispinpigott at outlook.com>> wrote:
>
>>         Solar concentrating cooker:
>>
>>         One of the main problems encountered with solar cookers (K14,
>>         K16 and so on) in the last big GIZ effort in North-West
>>         Province of South Africa was, in spite of the rural location,
>>         theft of the stoves for sale to scrap merchants. Aluminum is
>>         valuable.
>>
>>         Another common problem is wind tipping them over.
>>
>>         A third is wind-blown dust getting into the food.
>>
>>         A fourth is theft of the food.
>>
>>         A fifth is storage of the unit.
>>
>>         People have little space in their homes and storage of a
>>         valuable cooker outdoors is not practical.
>>
>>         GIZ spent about 7m Euros on that project and declared no
>>         further interest in solar cookers.
>>
>>     Crispin
>>
>
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