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

[Rogerio carneiro de miranda]

Hello Ron and stove colleagues:

Indeed, very interesting what Kevin is doing with three stone fire to
improve efficiency. Clever, and boy, it took more than 10k years to figure
out such simple solution.......

Regarding the rocket stoves, what I have done is what a call an extended
rocket stove chamber.   Usually an stand alone rocket stove supports only
one pot under its combustion chamber, but if you add a griddle on top of
it, you can use two or even three pots by channeling the hot gases under
the griddle, before going to a chimney.

My extended rocket stove does support two pots under the same combustion
chamber, which basically I make  a longer rocket stove ¨chimney¨, which
does allow two pots above and on the same level. Of course, the fuel
consumption is higher, 1.45 kg/hour in contrast with 0.9 kg/hour in a one
pot stove.

I made this extended rocket stove in order to power a four burners Premium
Ecostove, which has an one meter long griddle (4 pots holes), a 45 liters
oven, and a water coil heater.   Basically, I get direct flames under the
first two holes from the extended rocket chamber, and also flames onto the
third hole by the suction from the chimney draft.  On the fourth hole I
usually get flames only when the stove is operating at full power.

This new stove was developed in response to the Brazilian market, which
liked the benefits of the rocket stove, but demanded a more powerful and
useful stove.  Here a link for a photo of our Premium Ecostove
https://ecofogao.com/wp-content/uploads/2018/08/WhatsApp-Image-2018-07-16-at-10.44.02.jpeg

Regards

Rogério


Em qui, 25 de abr de 2019 às 01:02, Ronal Larson <rongretlarson at comcast.net>
escreveu:

> List:   cc Kevin M
>
> 1.   This is to bring you up-to-date on Kevin McLean’s “zero cost” stove
> work - that I have learned in the last 4 weeks..  This today is on three
> (mainly one) new concepts (despite keeping the thread name).   It has
> applicability especially to those working with Rocket stoves - but I am
> pretty sure he/we can find ways to work also with TLUDs.
>
> 2.  After Kevin sent me 3 short videos a few days ago,  we agreed there
> could be great benefit to his and everybody’s stove research to get this
> early work out for discussion.  So this is to ask everyone to view Kevin’s
> annotated 2 minute video on an approach I have not previously seen:
> https://drive.google.com/file/d/1EJQEKKkMTQbcKn3kBC1YZ50oqtZPsbym/view.
>   I am amazed that so much energy gets to the second pot (and he may
> develop a 3 pot design, that also looks well worth the relatively small
> added extra cost).  No metals anywhere.
> Anyone seen this before?
>
>   3.  I will try to report soon on two other new (to me) very low cost
> stove improvement areas on which Kevin has also been working - and which I
> am unaware of any others pursuing:
> -   adding energy storage using movable hot rocks or bricks (headed to hay
> baskets maybe?)
> -  making char while cooking (and NOT with TLUDs)
> Can anyone give a lead to these storage and char-making areas?
>
> 4.   The 4th area of our discussions since the message below still seems
> brand new:
> - improved air flow with 3-stones - using "rocks and clay grates” to
> elevate the fuel.
>
> 5.  Since Kevin is adamant on zero costs to users (and minimum costs
> allowable when payback time is short), these ideas are not amenable to most
> companies looking at the 3-stone-user market.  Accordingly, Kevin will not
> be patenting any of this - all 4 areas will be open source.
>
> Anyone working on any of these 4 areas?  Or know of past results from
> anywhere?
>
> Ron
>
>
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