Dear Dean and Paul O.,
The type of device that you describe (your messages are below) has been
done but at this point it is not commercially viable at small sizes for
residential purposes.
Note: What are commonly called "Pellet Stoves" in America meet your
criteria of having "forced draft with auger pellet heating stove" and
are affordable by affluent people. However, they have full-combustion
in one spot (burn all the way to ash without the
gasifier-charactertistic of making gases separately from the burning of
the gases.) And they are not really configured to be cooking stoves.
The American pioneer of pellet stoves (Jerry Whitfield see:
http://woodpelletguru.blogspot.com/2007/12/in-beginning.html ) has
stated in the past year at some conference his interest in making a unit
with the cooking function. But i have not heard more about that, and I
do not have direct contact with him. Info about pellet stoves is at:
http://en.wikipedia.org/wiki/Pellet_stove
Jerry Whitfield is also interested in biochar: See
http://harvestcleanenergy.org/blog/Jerry-Whitfield-on-biochar.html
On the topic of an actual gasifier for this task, the AVUD technology
and initial products have been done by Chip Energy. See
www.chipenergy.com (Biomass Furnace and the Biomass Grill) and is
described in the widely available paper "Micro-gasification: What it is
and why it works" published in Boiling Point several years ago. (also
found at the www.drtlud.com website ).
The problem is the costs of having augers and fans only become
financially viable when the unit size is substantially larger than what
is practical for residential use. I believe that this can be
overcome, but I and Chip Energy do not have the financial muscle to
undertake that venture at present.
If anyone would like to explore that type of device, please contact me.
And you can meet with me, but this will NOT be a focal topic/target
of my activities at the Stove Camps where I will be presenting in
Uganda, Oregon, Tennessee and Massachusetts in July, July, Aug, and
Oct., respectively.
I do not recommend that you start from scratch. It took me 8 years to
get to the AVUD stage, and I and Chip Energy have not revealed
everything in the publications.
Paul
Paul S. Anderson, PhD aka "Dr TLUD"
Email: [email protected] Skype: paultlud Phone: +1-309-452-7072
Website: www.drtlud.com
On 5/11/2013 9:51 PM, Dean Still wrote:
Hi Paul,
Although we have tried repeatedly to make a true gasifier (making gas
in one place that is transported to and burned in a wood gas cooking
stove) we haven't had great success. It seems easier to me to follow
the forced draft with auger pellet heating stove approach. This is a
well known technology and might be relatively easy to change into a
cooking stove for folks in industrialized countries, I think. The TLUD
comes close but doesn't have the ease of operation of a forced draft
auger type pellet stove.
I'll try to make a prototype model for Stove Camp. I agree that it's
much better to only burn renewable gas that does not add CO2 to the
atmosphere. Let's get to work and create the needed solutions.
Best,
Dean
On Sat, May 11, 2013 at 7:19 PM, Paul Olivier <[email protected]
<mailto:[email protected]>> wrote:
Anil,
I really think that we are coming close to the day when biomass
stoves could be installed in modern kitchens. If biomass fuel has
a relatively high bulk density, if it is uniform in grain size, if
it is below 12% in moisture, (in other word, if it's well
prepared), it could be gasified or pryrolized in such a manner
that it could produce a gas that could compete with the gas
derived from fossil fuels that are now being burned in modern
kitchens. It's not enough that we design biomass stoves for poor
people. We should be using them ourselves.
I say to the entire stove community. Wake up. Design biomass
stoves that you would be proud to use in your own kitchens. Do not
just worry about the respiratory health of poor people. Think
equally about the much bigger picture of the health of our entire
planet that profoundly impacts rich and poor alike. Every time we
turn on a modern gas appliance, we are contributing to global
warming. Let us do all within our power to put an end to this
nonsense.
Paul Olivier
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