In a message dated 12/2/2010 9:46:16 A.M. Eastern Standard Time,
[email protected] writes:
DD Dan Dimiduk comments
Many stoves that appear to be burning with low smoke have too small a
region
above the primary combustion for the flame to finish burning properly. It
is
typically the chilling of the half-finished burn that looks clean but is
high in CO. If the gas flame from charcoal of a gasifier does not have at
least 50mm (usually 100 is needed) for flame space, it will not complete
the
burn and have high CO. By flame space I mean the distance from the
beginning
of the flame and the bottom of the pot or heat exchanger. If you see flames
running along the bottom of a pot, or exiting into the air, you will know
it
has high CO.
Regards
Crispin
DD I like this paragraph Crispin, because it gives us something to look
for. Even though the comparison may change with the stove design, the
visualization of the reaction is what is important. Clean CO burns almost clear
but has a different bluish tint than Hydrogen. Watch the flames over a burning
charcoal bed. Generally in a woodstove you will see the yellow hydrocarbon
flames masking the less visible flames.
Dan Dimiduk
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