Re: Gasifier fundamental question

["Tom Reed" <tombreed@attbi.com>]

Dear All;

I agree with Kevin Chisholm's remarks about "yellow flame quenching".  The
fraction of the visible yellow flame that is intercepted by the pot is the
fraction that is not burned well and by which heat transfer is reduced
(approximately).

It also blackens the pot.  So our woodgas stoves are designed to burn with
appropriate air and no yellow flames.

TOM REED            BEF STOVEWORKS
----- Original Message -----
From: "Kevin Chisholm" <kchisholm@ca.inter.net>
To: "A.D. Karve" <adkarve@pn2.vsnl.net.in>; <stoves@crest.org>
Sent: Sunday, April 14, 2002 9:04 AM
Subject: Re: Gasifier fundamental question


> Dear Dr. Karve
>
> I think Paul is asking the wrong question, when he asks if it makes any
> difference where the fuel is being burned.
>
> The answer to that question is, to me, in my blatant humble opinion, is
very
> obvious: It must be burned where the stove design requires it to be
burned.
>
> I also feel that a stove design which has a yellow flame contacting a
> surface from which heat is being removed is a poor design, in that the
> combustion in process will be partially quenched, leading to blackening of
> the pots, loss of heat transfer capability,  loss of heating value, and
the
> presence of the products of partial combustion in the off-gas products.
>
> Kindest regards,
>
> Kevin Chisholm
>
> ----- Original Message -----
> From: "A.D. Karve" <adkarve@pn2.vsnl.net.in>
> To: <stoves@crest.org>
> Cc: "Paul S. Anderson" <psanders@ilstu.edu>
> Sent: Saturday, April 13, 2002 10:03 PM
> Subject: Re: Gasifier fundamental question
>
>
> > Paul asked what difference it made if the gas burnt in the upper part of
> the
> > stove and the charcoal on the grate.  According to him, heat was heat,
and
> > as long as all the fuel was burnt, and all the heat released, it should
> not
> > make any difference, whether the heat came from the gas or from the
> > charcoal. ..
> ...del...
>
>
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