[Stoves] Char conductivity

[Alex English]

Hello Fire-breathers,

Char conductivity has been linked to the structure and properties of 
wood char.
This paper proposes that a structural change occurs, from double 
bondeded (C=C )carbon to single ( C-C) bonds, when carbonizing wood at a 
temperature somewhere between 600-800C. This is right in the common or 
normal TLUD operating range.

www.geocities.jp/yasizato/Yoshizawa15.pdf


The video shows a very simple way to check for char conductivity  by 
shorting the terminals of a 9 volt battery with a charred wood chip.

http://www.youtube.com/watch?v=-69IWPB91Ec&feature=youtu.be

A multimeter can also be used to measure the resistance in ohms, or the 
current can be measured in circuit with a 9 volt battery and the 
resistance calculated. R(Ohms)=Volts/Amp
For example, I measured 50 milli Amps of current through one of these chips.

9Volts/.05Amps=180 Ohms

I have also measured zero Amps, "infinite" resistance, a non conductor.

This may be the easiest field test for characterizing char next to the 
oily finger test and the ouch that's still hot test.
Should be able to do thousands of tests with a single battery.

Put a 9 volt battery it in you TLUD kit and shed some light on into the 
black box that is charcoal :)

Alex