[Stoves] improving charcoal stoves

[Tom Miles]

Dean,

I agree that you probably have more volatiles in the charcoal than you would
expect. CO is going to lose it's enthusiasm for ignition below 760 C. To
keep the temperature up you're going to have to contain the fire, burn off
the volatiles through better mixing at temperature, provide more air to the
char, or some combination of these.  

What types of stoves are you testing?

Tom
     

-----Original Message-----
From: stoves-bounces at listserv.repp.org
[mailto:stoves-bounces at listserv.repp.org] On Behalf Of Yury
Sent: Monday, May 29, 2006 1:07 AM
To: Peter Verhaart; Dean Still
Cc: stoves at listserv.repp.org
Subject: Re: [Stoves] improving charcoal stoves

Dear Deen Still and Peter Verhaart,
I know, that charcoal does not select CO at normal combustion. I have own
experience, but I can refer to experience of the Japanese. They contained
fire baskets with coal in locations many centuries. The normal combustion
requires surplus of air for any combustible. The coal is not capable to
select CO, if it does not contain a lot of volatile.
Thanks, Yury Yudkevich

----- Original Message -----
From: "Peter Verhaart" <pverhaart at iprimus.com.au>
To: "Dean Still" <dstill at epud.net>
Cc: "'Stoves-List'" <stoves at listserv.repp.org>
Sent: Monday, May 29, 2006 11:24 AM
Subject: Re: [Stoves] improving charcoal stoves


> Dean Still wrote:
> > Dear Lanny and the List,
> >
> > We are trying to improve charcoal stoves but are not having much
success.
> >
> > Here's what I think about charcoal but I'm sure that others will
enlighten
> > me a lot more since I'm just starting to play with it.
> >
> > 1.) Charcoal does not burn very hot. A thermometer an inch above the
burning
> > charcoal only reads 600C or so. Wood fires are a lot hotter more 
> > like
900C?
> >
> It depends on the air supply, with sufficient air charcoal burns a lot 
> hotter than wood. It used to be used in blast furnaces until the 
> landscape was denuded of trees.
> What is PM? Particulate matter? If so, how does CO form it when  it 
> burns to CO2?
> > 2.) Charcoal emits a lot of CO but not much PM. The CO escapes 
> > because
there
> > are few flames to burn it up. Flame makes PM so maybe for the same
reason
> > there's low PM?
> >
> >
> Do we know how much CO escapes from a charcoal stove?
>
> With kind regards,
>
> Peter Verhaart
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