[Stoves] Briquette ignition in a Vesto Junior

[Chris Hollonds]

Hi Crispin,
I am based in Dili, Timor Leste. We are about to start production of a
rocket style stove that consists of a fireclay insert from China cast in a
concrete surround. This is great for Dili where it is always warm however I
am looking for a design that can be used for heating as well, for
households in the mountains. What would you suggest?
We are also looking at making briquettes both charcoal and biomass. We have
a lot of agricultural waste, coffee husks, rice husks, corn cobs etc as
well as sawdust. do you have some links to help?
Thanks,
Chris


On Fri, Aug 3, 2012 at 6:02 AM, Crispin Pemberton-Pigott <
crispinpigott at gmail.com> wrote:

> Dear Briquette-Burning Friends****
>
> ** **
>
> George of the Jungle in the Gambia has provided some pretty interesting
> photos of the ignition and development of a fire in a Vesto Junior. The
> fuel is a hardwood sawdust bound by shredded, soaked typing paper. The fuel
> was made in a press designed by Richard Stanley.****
>
> ** **
>
> The important dimensions are that the combustion chamber is 125mm in
> diameter and the briquette is 110mm. They are about 75 mm high. Burning two
> at a time (it can stack 3) looks like this:****
>
> ** **
>
> [image: Description: cid:image009.jpg at 01CD70C7.93854540]****
>
> ** **
>
> [image: Description: cid:image010.jpg at 01CD70C7.93854540]****
>
> ** **
>
> [image: Description: cid:image011.jpg at 01CD70C7.93854540]****
>
> ** **
>
> [image: Description: cid:image012.jpg at 01CD70C7.93854540]****
>
> ** **
>
> [image: Description: cid:image013.jpg at 01CD70C7.93854540]****
>
> ** **
>
> [image: Description: cid:image014.jpg at 01CD70C7.93854540]****
>
> ** **
>
> The fire is a combination of a gas production zone with restricted primary
> air and a secondary air supply zone, with enough clearance around the
> briquette to prevent the outside of the fuel being kept away from the fire.
> If the briquette is tight in the chamber, it does not burn properly at a
> decent rate. Basically, it has to breathe.****
>
> ** **
>
> The flame space is sufficient to allow the combustion to be mostly
> completed before the hot gases hit the pot.****
>
> ** **
>
> George will report later on the burn rates, fuel savings and cooking
> efficiency.****
>
> ** **
>
> Regards****
>
> Crispin****
>
> ** **
>
> PS A Vesto Junior is a Vesto without an air controller. This project was
> designed around a humid tropical environment, locally produced biomass
> briquettes and a stove that will be largely manufactured locally to a
> specified design.****
>
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>
>


-- 
Chris Hollonds

Timor +670 748 6556
Australia +61403077655
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