List,
We seem to have moved on from the direct heating (drying) of fuel without
really answering the original question of water content in IC exhaust. I
understand the indirect heating, like Doug's nearly horizontal heat exchanger,
but what about the direct introduction of engine exhaust gas for drying
incoming fuel? Of course not all H2 is converted into H2O in an IC engine, but
one would hope a significant portion is. Same with CO and CO2. If 15% is H2,
is 15% of the exhaust water vapor?
Has anyone tried putting a producer gas fired engine exhaust directly into a
stock of wood fuel?
Bruce, re materials and absorbsion of IR heat, do you notice with your wood
stoves a difference between cast iron and steel? Cast, while changing the
wavelength some, is nearly transparent to the IR heat, while steel blocks it
almost completely and heat exchange becomes conductive. For example, my stove
has soapstone on the sides and top and cast iron and glass on the front and
back. The glass is nearly transparent, with no change to the wave-length. The
stone, being nearly opaque to IR absorbs the heat and re-radiates it back over
a long time. The cast is noticably different and quickly radiates the heat
into the room, making the heat "feel" warm because most of the IR component
goes through it and is not absorbed. Steel stoves do not have that
same "feeling" that one gets when the IR is warming you like a cast stove
does. I guess that stainless is even more "opaque" than regular carbon steel.
One final thought on greenhouse. Engine exhaust would presumably make most of
the CO into CO2 (but not all) and H2 into H2O, benefiting the plants. This
would seem to be an argument for having not only a gasifier, but an engine or
combustor in greenhouse application. But is there any way to assure a safe
level of CO for direct exhaust into a greenhouse? Does it rise or fall in a
collum or can one assure a complete reaction in some way?
Regards,
Toby Seiler
Seilertechco
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