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Dear Dieter</div>
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Do you know the name(s) of the test methods used during that comparison, and did any of them make it to being accepted as an international solar cooker standard?</div>
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Also, thank you for your clarifications and request that we consider the whole solar sector is not a single 'thing'. Because solar cookers require a backup device, often a biomass stove, we should pay attention on this channel. </div>
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Arising out of the Soutýh African GTZ (at the time) project is the realisation that the biomass stove has to be rapid lighting. By the time the cook gives up on the solar cooked meal, the need for immediate heat is obvious. The report on the project should
be available on line. To be practical, the biomass and solar stoves should be marketed as a pair. We toyed with the idea at the time that the biomass stove could be built into the solar cooker. </div>
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Generally speaking the solar cooker cost a lot more than a back up stove. </div>
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Regards </div>
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Crispin </div>
ý<br>
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<p class="MsoNormal"><span lang="EN-US" style="">Dear Stovers,<br>
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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. </span></p>
<p class="MsoNormal"><span lang="EN-US" style=""> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="">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.
</span></p>
<p class="MsoNormal"><span lang="EN-US" style=""> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="">Kind regards,<br>
Dieter</span></p>
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<div class="moz-cite-prefix">Am 14.06.2017 um 03:46 schrieb Michael N Trevor:<br>
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<div dir="ltr">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<br>
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<div class="gmail_quote">On Wed, Jun 14, 2017 at 1:01 PM, Crispin Pemberton-Pigott
<span dir="ltr"><<a href="mailto:crispinpigott@outlook.com" target="_blank">crispinpigott@outlook.com</a>></span> wrote:<br>
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<div style="">Nikhil</div>
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<div style=""><span style="font-size:initial; text-align:initial; line-height:initial">Let's not assume anything.ý 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. </span></div>
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</span></div>
<div style=""><span style="font-size:initial; text-align:initial; line-height:initial">The conclusion was, no. ýAnd they swore them off. For them, if they had a chance anywhere that was the ideal place, and it was not viable. </span></div>
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<div style=""><span style="font-size:initial; text-align:initial; line-height:initial">Very sane. </span></div>
<div style=""><span style="font-size:initial; text-align:initial; line-height:initial">Crispin
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<div>Crispin;</div>
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<div>You have listed enough reasons to dispute the sanity of GIZ experts. </div>
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<div>Nikhil<br>
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On Jun 13, 2017, at 11:35 AM, Crispin Pemberton-Pigott <<a href="mailto:crispinpigott@outlook.com" target="_blank">crispinpigott@outlook.com</a>> wrote:<br>
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<p class="m_-2998778485329479889MsoNoSpacing"><span>Solar concentrating cooker:</span></p>
<p class="m_-2998778485329479889MsoNoSpacing"><span> </span></p>
<p class="m_-2998778485329479889MsoNoSpacing"><span>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. </span></p>
<p class="m_-2998778485329479889MsoNoSpacing"> </p>
<p class="m_-2998778485329479889MsoNoSpacing">Another common problem is wind tipping them over.</p>
<p class="m_-2998778485329479889MsoNoSpacing">A third is wind-blown dust getting into the food.</p>
<p class="m_-2998778485329479889MsoNoSpacing">A fourth is theft of the food.</p>
<p class="m_-2998778485329479889MsoNoSpacing">A fifth is storage of the unit. </p>
<p class="m_-2998778485329479889MsoNoSpacing"> </p>
<p class="m_-2998778485329479889MsoNoSpacing">People have little space in their homes and storage of a valuable cooker outdoors is not practical.</p>
<p class="m_-2998778485329479889MsoNoSpacing"> </p>
<p class="m_-2998778485329479889MsoNoSpacing">GIZ spent about 7m Euros on that project and declared no further interest in solar cookers.</p>
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<p class="m_-2998778485329479889MsoNoSpacing"> </p>
<p class="m_-2998778485329479889MsoNoSpacing">Crispin</p>
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