Crispin,
Some TLUD's heat pretty much all the wood at once (they vary).
Please describe in detail. I want to know what you call a TLUD in this
case.
Paul
Paul S. Anderson, PhD aka "Dr TLUD"
Email: [email protected] Skype: paultlud Phone: +1-309-452-7072
Website: www.drtlud.com
On 6/12/2013 11:04 AM, Crispin Pemberton-Pigott wrote:
Dear Dale
I believe it is easiest to burn wet wood in a continuous feed fashion.
I have had some recent experience in Indonesia trying burn wet (pretty
damp) wood in a TLUD. Some TLUD's heat pretty much all the wood at
once (they vary). When that happens there is a huge burst of moisture
in the emissions. This is visible on the HPT data quality check chart
as depressed?O_2 and ?CO_2 lines (they should depress in synch). The
evaporation of all the moisture early makes for problems later because
then the wood it so dry it won't stop self-pyrolysing. In other words
if combustion conditions favour wet wood, later they do not favour dry
wood remaining.
Tom has some experience, as does UK-Andrew in burning pretty wet
biomass. The essential point is to keep the primary combustion zone
hot enough to run the fire and still evaporate all that moisture. Heat
recycling is by far the easiest way to do that.
Good to hear from you. Any recent experiments to repot? I have missed
your great lab work.
Regards
Crispin
+++++++
Have we ever looked at the question of how to design a stove to burn
wood that is higher in moisture? It would seem that this is very
important practical issue, and that a stove that could burn wet wood
would be very popular. What makes a stove burn wet wood well or poorly?
The only time I remember someone saying something about this was
Crispin, who I believe said recently that preheating the primary air
makes it possible to burn wetter wood. This would be easy with a
batch stove, harder with continuous feed. Other than that, I can
think of a couple things that might help burn wetter wood.
Dale Andreatta
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