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<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:"Calibri",sans-serif">Dear Ron, <span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:"Calibri",sans-serif">thank you for your kind remarks. We are looking back to
about 40 years of dedication to the development and spreading of parabolic
solar cookers (SK-types), together from the beginning with my wife Imma and our
friends Dr. Shirin and Deepak Gadhia. The NGO EG-Solar (<a href="http://www.eg-solar.de">www.eg-solar.de</a>) was
founded to propagate the SK-cookers (now about 40,000).<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:"Calibri",sans-serif">Your solar cooker you probably bought 2002 at WSSD in
Johannesburg is from Koch Anhaengerwerke, who produced kits for parabolic cookers
of various sizes in larger quantities. Koch terminated the production, but I
hope there will be a new start with special kits, especially for school
programs. <span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:"Calibri",sans-serif">There are huge opportunities through the combination of
overcoming fuelwood crisis in developing countries and financing programs
through certificates for saving of CO2-emission. I guess that equipping poor
households with sustainable household energy supply can reduce (non-renewable)
fuelwood consumption from about 4000 to 400 kg/household/year.<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:"Calibri",sans-serif">You may find in: <a href="https://char2cool.de/wer-wir-sind/">https://char2cool.de/wer-wir-sind/</a>
information about biochar production from invasive water hyacinths as a helpful
example. First plan was to use SK-systems for the conversion, but than a simple
converter was developed for thermal conversion of the dried plants.<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:"Calibri",sans-serif">Kind regards,<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:"Calibri",sans-serif">Dieter<span></span></p>
</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Am So., 24. Juli 2022 um 23:20 Uhr schrieb Ronal Larson <<a href="mailto:rongretlarson@comcast.net">rongretlarson@comcast.net</a>>:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="overflow-wrap: break-word;"><div dir="auto" style="overflow-wrap: break-word;"><div>Dieter and list, cc Kevin and4 friends of solar cooking</div><div><br></div><div><span style="white-space:pre-wrap"> </span>Your message below is a surprise. </div><div><br></div><div><span style="white-space:pre-wrap"> </span>a. I bought one of your parabolic concentrators (from you in person) - I think in 2009 at that year’s ISES meeting in Johannesburg, A solar cooking friend recently took it to the ASES Headquarters in Boulder, as I moved to a smaller place..</div><div><br></div><div><span style="white-space:pre-wrap"> </span>b. Not many on this list will know that you are exceedingly well known in solar cookers. I’ve added four (possibly mutual friends through SCI ) to add more on your own contributions over many years They all know the charcoal-making topics here</div><div><br></div><div><span style="white-space:pre-wrap"> </span>c. I had no idea you have been working on wood stoves - especially designs that could receive a parallel solar input.</div><div><br></div><div><span style="white-space:pre-wrap"> </span>d. My own interests are now shifted from solar to biomass stoves - but always now with char-making as a carbon negative co-product. (Because char-using stoves have so badly ruined so many forests. - and must be phased out.)</div><div><br></div><div><span style="white-space:pre-wrap"> </span>e. This list has also recently been much more on char-making stoves than char-using or the “Ben” type you are working on. Maybe because they are new and still gaining converts and new ideas. For some reason, your contribution below is now quite rare on this list - unfortunately..</div><div><br></div><div><span style="white-space:pre-wrap"> </span>f. I think there is much less reason to run solar and char-making together, but urge char-making stoves as the backup when the sun is not available.</div><div><br></div><div><span style="white-space:pre-wrap"> </span>g. I found some information on “Ben” at <a href="https://solarcooking.fandom.com/wiki/Dieter_Seifert" target="_blank">https://solarcooking.fandom.com/wiki/Dieter_Seifert</a>. Please tell us of other sites. I’m sure the SCI site is better for solar cookers, but this list needs to learn more about solar cooking.</div><div><br></div><div><span style="white-space:pre-wrap"> </span>h. I’d also like to discuss making char with solar concentrators. (probably troughs, but maybe not) I’ ve only seen that concept once in print. Cooking with the resulting syngas might offer some advantages in the solar cooking world. Can use the concentrator all day.</div><div><br></div><div><span style="white-space:pre-wrap"> </span>i. Making char seems to me to be the most popular form of carbon dioxide removal (CDR) in general - not just in stoves. Because char is needed in soils.</div><div><br></div><div><span style="white-space:pre-wrap"> </span>j. Kevin McLean is often now writing about a char-making stove that seems to be vary attractive to the many users of 3-stones - essentially zero cost. He uses “rods” some.</div><div><br></div><div>Ron</div><br><div><br><blockquote type="cite"><div>On Jul 24, 2022, at 12:54 AM, Dr. Dieter Seifert <<a href="mailto:doseifert@googlemail.com" target="_blank">doseifert@googlemail.com</a>> wrote:</div><br><div><div dir="ltr"><p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:"Calibri",sans-serif"><span style="font-size:12pt;line-height:107%">Dear all,<span></span></span></p><p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:"Calibri",sans-serif"><span style="font-size:12pt;line-height:107%">For simplifying
the operation of the fire, I propose a long, pull-out ash <a name="m_8195675771557324864__Int_2HW8xuze">pan</a> with a built-in grate, made of hairpin-shaped steel
rods (see Ben-Stove documentation). It also serves for easier handling of the
ash.<span></span></span></p><p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:"Calibri",sans-serif"><span style="font-size:12pt;line-height:107%">Best regards,<span></span></span></p><p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:11pt;font-family:"Calibri",sans-serif"><span style="font-size:12pt;line-height:107%">Dieter<span></span></span></p>
</div>
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