[Stoves] Uganda Turns to Local Volcanic Rocks As Substitute for Charcoal

[Paul Anderson]

Stovers,

This stove (according to website info) has a fan (and a solar panel and 
a battery).   The volcanic rock is likely to be pumice (very porous).

The users still put in charcoal or wood (or coal, as Crispin will 
test),   They do not get energy from the volcanic rock, but the rock 
could be holding valuable heat for more efficient transmission to the pot.

Very interesting.    Could such rock be put to use in TLUD stoves?     
Who has access to such a stove and can give us firsthand info?

Paul

Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD
Email:  psanders at ilstu.edu
Skype:   paultlud    Phone: +1-309-452-7072
Website:  www.drtlud.com

On 6/13/2018 11:00 AM, Crispin Pemberton-Pigott wrote:
>
> I like the idea of being able to burn powder on a substrate. I will 
> try it with coal dust.
>
> The calculation of thermal performance and fuel efficiency is straight 
> forward.
>
> On with the masterpieces!
>
> Crispin
>
> *From:*Nikhil Desai <pienergy2008 at gmail.com>
> *Sent:* Wednesday, June 13, 2018 10:54 PM
> *To:* Crispin Pemberton-Pigott <crispinpigott at outlook.com>; Andrew 
> Heggie <aj.heggie at gmail.com>
> *Cc:* Cookswell Jikos <cookswelljikos at gmail.com>; Paul Anderson 
> <psanders at ilstu.edu>; Cecil Cook <cec1863 at gmail.com>
> *Subject:* Re: [Stoves] Uganda Turns to Local Volcanic Rocks As 
> Substitute for Charcoal
>
> What it says is that thermal storage improves the efficiency of 
> cooking chicken.
>
> "Like regular charcoal, these rocks are stacked in the stove and 
> charcoal dust is spread liberally atop them.
>
> Twigs of pine or any highly flammable species are then inserted in the 
> middle of the rocks and lit with a match."
>
> The dust and twigs are the primary combustibles. The way they are set, 
> with the size and location of the rocks and the chicken, is all it 
> takes to cook.
>
> So much for your theology of heating water and computation of efficiency.
>
> A stove is to cook something in the time required and at times 
> desired. Nothing else. Get off your "performance standards". To hell 
> with scientists.
>
> N
>
>
> ------------------------------------------------------------------------
> Nikhil Desai
>
> (US +1) 202 568 5831
> /Skype: nikhildesai888/
>
> On Wed, Jun 13, 2018 at 9:23 AM, Crispin Pemberton-Pigott 
> <crispinpigott at outlook.com <mailto:crispinpigott at outlook.com>> wrote:
>
>     It sounds like they are confusing the word 'heat' with 'burn.
>
>     It is a solar thermal storage ‎cooker from the sound of it. Has
>     anyone seen one?
>
>     Crispin
>
>     Hello everyone,
>
>     Would anyone know more about exactly what type of rocks these area?
>
>     /''Ms Twine said the rocks only work in the solar-powered Eco
>     Stove, which comes with an internal air supply system that helps
>     heat up the rocks./
>
>     /The stove is also fitted with an on-off switch that enables the
>     rocks to burn when turned on, and cool and return to their natural
>     state when turned off. The stove comes with a radio, phone charger
>     and has two lights./
>
>     /Unlike charcoal which burns down to ash, these rocks can be used
>     multiple times without losing their power or texture./
>
>     /Domestic stoves retail at Ush200,000 ($53) together with the
>     rocks while a "bag" of the rocks alone sells for Ush35,000 ($9)
>     for domestic use and can last up to six months./
>
>     /Ms Twine says since the stove does not emit smoke, those using it
>     are protected from indoor pollution./
>
>     /"They [rocks] do not produce smoke, burn for a long time and you
>     do not need charcoal anymore," she adds/
>
>      http://allafrica.com/stories/201806060869.html
>     <https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fallafrica.com%2Fstories%2F201806060869.html&data=02%7C01%7C%7C8d26c5b5e33d4d3a222208d5d12ece3b%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636644921306201847&sdata=BIhVbdhlf8BuGjm%2FalzmCOOAwg7JmKBGo4Uk7DlANNQ%3D&reserved=0>
>
>
>
>     Teddy Kinyanjui
>
>     Sustainability Director
>
>     for more Biomass Cooking Stoves,  News and Information see our web
>     site:
>     http://stoves.bioenergylists.org/
>     <https://eur04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fstoves.bioenergylists.org%2F&data=02%7C01%7C%7C4bbe8e7f133b4162090908d5d13d7b11%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636644984337425712&sdata=a%2BwFXFFZxzAaRvko7YLZe18BLwxOAKY%2F6uOLldqGU78%3D&reserved=0>
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