Martin,
Concerning "space fillers", I and probably others have put wood chips
and small pieces into TLUDs where there is otherwise too much space
between the main biomass fuel pieces. Yes, the chips do pyrolyze.
But my point is that making small pieces of biomass for filler can be
difficult. But using char pieces from previous TLUD batches is very
easy. But just do not expect to get much energy from the charcoal
filler, because it has already been pyrolyzed.
Concerning your comment/question about measuring the flow of primary
air, it is not sufficient to measure characteristics of the
fan/blower/pump because the holes in the bottom of the TLUD are
intentionally small and the fuel is intended to (expected to) block some
of the flow. What is needed is to measure the flow INSIDE the fuel
cylinder, such as in the bottom 2 cm of fuel. But how to do that?
Paul
Paul S. Anderson, PhD aka "Dr TLUD"
Email: [email protected] Skype: paultlud Phone: +1-309-452-7072
Website: www.drtlud.com
On 5/6/2013 3:56 PM, Boll, Martin Dr. wrote:
TLUD-ers turn it as you want;
Charcoal as space-filler means __somehow__ that "mixed fuel" is used in a TLUD. From
that aspect it is a "hybrid-fuelled" TLUD.
Change the ratio of the "hybrid-fuelled" TLUD to: wood-pieces as space-filler
(by charcoal-packing). Run this different mixture and look.
Who did this already? Interesting to hear about.
- It would be as well interesting to know the difference in performance between
test-runs with natural draft and with forced air.
Even by that different ratio, the burn can be stopped after outgassing, to get
as final result charcoal.
- Hybrid-fuelled TLUDs would get probably a better quality of resulting
charcoal ( Frank, mentioned that as important difference for bio-char)
P.S. We could stop guessing about the amount of more or less _primary air_
(caused by the minimal pressure of a fan or natural draft in different-dense
TLUD-packages), and make an exact air-dosage by a rotameter, or less expansive
and simpler by an aquarium-air-pump.
Martin
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