[Stoves] Simple Modifications to Traditional Wood Cookstoves -Rocks and Clay Grates

[K McLean]

Ron, Crispin, thank you for the encouraging words.

All,

My (Sun24) primary and immediate focus is on the dissemination of the idea
of using rocks or brick pieces to improve traditional wood
<https://docs.google.com/document/d/1Nww3FDj0l-VjzdC5NOCmbe_dLPIPBUD-i4I5WDc4Vsw/edit>
and charcoal
<https://docs.google.com/document/d/14iG6rVoa6JHTgXmVGEGIf048_yWoOK_Jxun8aKblOyo/edit?usp=sharing>
stoves.  With help from SNV (lab testing
<https://drive.google.com/file/d/1bQ8_htCs-eiVT7LCkQQ-by8Nz-Gi4ciL/view?usp=sharing>)
and hundreds of women in several developing countries, we have determined
that the simple, free act of putting rocks in a cookstove makes that
cookstove more efficient.  We expect to conclude extensive training
throughout Uganda and Kenya in a couple months and expand into many other
countries very soon.

We are also working on an instructional video that can be translated into
any language.  We hope to upload the videos to YouTube and spread them by
social media.

We will continue to test new ideas, such as the 2-burner stove, as Ron
indicated.

I hope that you will improve on these ideas.

Thank you,
Kevin

*Kevin McLean, President*
*Sun24*

*https://sun24.solar <https://sun24.solar>  Sun24 Cookstoves Overview
<https://docs.google.com/document/d/1ZryS7gQ1q3zKLZPM2KcXdtIHbOYQp4PbloPqMvrlZ5Y/edit?usp=sharing>*
*Tampa, Florida, USA*
*+1 (813) 505-3340*







On Fri, Apr 26, 2019 at 1:31 PM Ronal Larson <rongretlarson at comcast.net>
wrote:

> Kirk and list:
>
> See few inserts below.
>
>
> On Apr 25, 2019, at 3:31 PM, Kirk H. <gkharris316 at comcast.net> wrote:
>
> All,
>
> Concerning whether this stove is in parallel or series, I see both.  Some
> of the fire, in the back, goes directly to the second pot, that is
> parallel.  Some of the flame from the front hits the first pot and then
> passes on to the second, that is series.
>
> *[RWL:  I can agree some but If the first pot allows flame up the sides of
> the pot, would you agree that has no series aspect?*
>
> * The main point I didn’t emphasize enough is that Kevin has started with
> the simplest possible type of Rocket.  With almost zero cost, he has added
> two parallel bricks in front of the normal Rocket opening,  This makes
> the “fuel combustion region” twice as long as normal (the original fuel
> area only now being minimally used).  The pot sitting on these two new
> added bricks seems to be receiving about half of the useful energy (more or
> less is now being tested in Uganda).  I think this is a brilliant addition
> to ANY rocket - but Kevin’s Rocket is also near zero cost (his bricks are
> costing less than a nickel each).*
>
> * His emphasis on giving away ideas rather than selling products is what
> makes me so interested in his work.  And using church networks for
> dissemination.  And even more low-cost dissemination approaches are in the
> works!*
>
> * He is accomplishing a large amount on a minimum budget.   Think what
> could happen with a iittle more money.*
>
> * I have avoided 3-stone fires for 25 years.  A mistake.*
>
>
> The use of grooves instead of a pot stand would decrease the open area,
> and so increase the flow resistance at the second pot.  This may be to
> direct some heat to the front pot and keep all of the heat from going
> directly to the small chimney which has the most draft.
>
> *[RWL:  Nice idea.  *
>
> * Kevin has been putting most of his effort on introducing small rocks for
> air control.  He might be able to achieve the same idea as grooves - with
> small rocks to similarly increase resistance.*
>
> * Anyone else have a similar idea to check out?*
>
> * Anyone seen any earlier use of a first pot in front of a Rocket?*
>
> * I am still trying to figure out a similar simple modification of TLUDs.
> Top lighting needs something different.*
>
> * Note Kevin is working on three other concepts - all in the category
> of “give-away”.  Nothing to sell.   His first message a month ago was on
> rocks to improve air flow below the fuel.  Two more concepts in the works:
>  char-making and energy storage.  Anyone want to offer their thoughts on
> these)non-rocket, non-airflow topics?*
>
> *Ron*
>
>
> Thank you all for this great discussion and information.
>
> Kirk H.
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
> *From: *Crispin Pemberton-Pigott <crispinpigott at outlook.com>
> *Sent: *Thursday, April 25, 2019 1:27 PM
> *To: *Ronal Larson <rongretlarson at comcast.net>; Discussion of biomass
> cooking stoves <stoves at lists.bioenergylists.org>
> *Subject: *Re: [Stoves] Simple Modifications to Traditional Wood
> Cookstoves -Rocks and Clay Grates
>
> Dear Ron
>
>
> <snip>
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