[Stoves] institutional rocket stoves

[Larry Winiarski]

Dear Xavier

Sometimes , where they have dirt floor, I sink part of the institutional 
rocket stove into the ground and use  a sloped feed or vertical feed . In 
thedown feed,  the combustion camber is then J shaped rather then L shaped 
and I use a horizontal tile or brick to hold up the sticks and control the 
air gap so that the air goes down the sticks to cool them and blow the 
flames into the tunnel. One can also dig a short trench in fron of the 
sticks and use a moveable big brick or block to hold the sticks vertical. 
One can also take this block out of the way and feed the sticks horizontal 
or clean out the ash.

God Bless

Larry Winiarski

----- Original Message ----- 
From: "Xavier Brandao" <xvr.brandao at gmail.com>
To: <stoves at lists.bioenergylists.org>
Sent: Sunday, August 07, 2011 5:18 AM
Subject: Re: [Stoves] Chimney Chula


> Crispin and stovers,
>
> "An advantage (for India) is the very low cooking height": I think it is 
> not
> only for India, we are facing this question at the moment in Benin. We 
> made
> an institutional rocket stove for the restaurant of the main university.
> They are testing it at the moment, if they like it, all universities in
> Benin could have these stoves. The first thing the cooks said when they 
> saw
> the stove was : "it is too high". Men and women in South-Benin are rather
> short-sized. The stoves they use traditionally are very short. They can
> stand up, using a big spoon with a long handle.
> We got this remark from other places, but people accepted, liked and used
> the stoves anyway. But it is the first time we get such "strong" 
> criticism,
> almost opposition. I said they would have to try it for a week or more, 
> and
> then give us their remarks. End-users of the equipment often fear they 
> will
> be imposed decision by people working above them and sitting in office.
>
> The rocket stove combustion chamber grows with the pot size. So does the 
> pot
> skirt. In the restaurant, they use only 50 kilos round pots, the biggest
> ones I have ever seen. The stove we made had to be tall : perhaps 1.10 -
> 1.20 meter high. It was one of the tallest we ever made. The women said 
> they
> would burn their arms on the hot skirt, and on the top of the pot, when 
> they
> will reach food in the bottom of the pot.
> They asked us to reduce the size, we said we couldn't since it was due to
> the technology, and that a shorter stove would be less clean and 
> efficient.
> We'll see in one week how they liked the stoves.
>
> Traditional stoves are convenient to use, but as you said they make "not
> enough flame space to complete the combustion well."
> All the institutional stoves I know (rocket, Lion stove, Esperanza stove,
> LEGO stove) and some other wood stove (Justa stove, Lorena stove) seem all
> to be working on the same principle: a combustion chamber tall enough for
> the fire to burn properly, then the shape can vary. If the pot is big, so
> must be the stove.
>
> Do you know any stove or any way to build a stove which would be small, 
> even
> if it needs to deliver high power to cook on big pots? Have you faced user
> acceptance issues because of the stove size ?
>
> Cheers,
>
> Xavier
>
>
>
>
> -----Message d'origine-----
>
> ------------------------------
>
> Message: 4
> Date: Fri, 5 Aug 2011 09:46:14 -0400
> From: "Crispin Pemberton-Pigott" <crispinpigott at gmail.com>
> To: "Stoves" <stoves at lists.bioenergylists.org>
> Subject: [Stoves] Chimney Chula
> Message-ID: <101001cc5376$0d935ef0$28ba1cd0$@gmail.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Dear Friends
>
> http://www.designtoimprovelife.dk/index.php?option=com_content
> <http://www.designtoimprovelife.dk/index.php?option=com_content&view=article
> &id=81&Itemid=63> &view=article&id=81&Itemid=63
>
> It gets some recognition. Looks like a combination of an Esperanza stove
> (small Lion with side-fed air) and a Lorena with pre-cast parts. Metal 
> grate
> used. I like that! It gives all air preheating.
>
> An advantage (for India) is the very low cooking height though there is
> obviously not enough flame space to complete the combustion well.
>
> Good looking.
>
> Regards
>
> Crispin
>
>
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