[Stoves] A Report on Some Experiments with the Top-Lit Up Draft (TLUD) Stove

[Tom Miles]

A Report on Some Experiments with the Top-Lit Up Draft (TLUD) Stove, Dale
Andreatta ETHOS 2007
 
See:
 <http://stoves.bioenergylists.org/en/andreattatlud>
http://stoves.bioenergylists.org/en/andreattatlud
 
 
Abstract
 
This report contains the results of some experiments with one version of a
natural draft Top Lit Up Draft gasifying stove of the "Champion" type
developed by Paul Anderson.   This stove is an interesting and potentially
useful design, but up to now the stove has been studied mainly
qualitatively.  
 
It was verified that the stove can be clean burning, and comparable to other
stoves in power and efficiency, and the power can be easily controlled.  A
range of fuels can be burned, however some fuels have better burning
characteristics than others and some fuels are not suitable.  A table is
presented containing details of what fuels can be used in a natural draft
device.  Details of the burning process such as combustion temperature and
burning rates are given.  
 
The report also contains pollutant output results obtained at the Aprovecho
Research Center.   The effects of primary airflow were determined for a
number of conditions by carefully controlling the primary airflow and
measuring the fuel loss.  Temperature profiles in the fuel bed were measured
in order to study the pyrolysis process further.  A rough chemical analysis
of the air-fuel ratio in the pyrolysis stage is given.  This shows that
pyrolysis occurs under very oxygen-starved conditions, as would be expected.
A basic model of the flow of gases through the stove is also given.