[Stoves] Space between biomass fuel and cookpot in an open-fire cookstove

[Dr. Dieter Seifert]

Dear Ron,

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 (www.eg-solar.de) was
founded to propagate the SK-cookers (now about 40,000).

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.

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.

You may find in: https://char2cool.de/wer-wir-sind/ 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.

Kind regards,

Dieter

Am So., 24. Juli 2022 um 23:20 Uhr schrieb Ronal Larson <
rongretlarson at comcast.net>:

> Dieter and list,  cc Kevin and4 friends of solar cooking
>
> Your message below is a surprise.
>
> 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..
>
> 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
>
> c.  I had no idea you have been working on wood stoves - especially
> designs that could receive a parallel solar input.
>
> 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.)
>
> 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..
>
> 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.
>
> g.   I found some information on “Ben” at
> https://solarcooking.fandom.com/wiki/Dieter_Seifert.  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.
>
> 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.
>
> 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.
>
> 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.
>
> Ron
>
>
> On Jul 24, 2022, at 12:54 AM, Dr. Dieter Seifert <doseifert at googlemail.com>
> wrote:
>
> Dear all,
>
> For simplifying the operation of the fire, I propose a long, pull-out ash
> pan with a built-in grate, made of hairpin-shaped steel rods (see
> Ben-Stove documentation). It also serves for easier handling of the ash.
>
> Best regards,
>
> Dieter
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