[Stoves] Hypothesis for Wonderwerk TLUD-ND

Sat Sep 3 02:31:19 CDT 2016

As to solvents, try pyridine. As I recall that takes up everything but the
really low-hydrogen polyaromatics.

Philip

From: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of
Paul Medwell
Sent: Friday, September 2, 2016 9:22 PM
To: Discussion of biomass cooking stoves
Subject: Re: [Stoves] Hypothesis for Wonderwerk TLUD-ND

Dear Philip,

Thanks for another great suggestion.

This is also something that is planned. As part of an unrelated project we
have been looking at this: we are still in the process of finding a solvent
that has a collection yield, that doesn't interfere with (or gives an
interference profile that we can correct for) and that OH&S will let us
have. Fortunately, for the cookstove work there are fewer constraints than
the other project (which is limited to sampling extremely low flowrates).
We'll find a solution and share it.

Cheers,
Paul

On 2/09/2016 11:34 PM, Philip Lloyd wrote:

I think you will find dissolving them in a fairly pure solvent and doing an
infra-red spectrum will tell you a lot.

Prof Philip Lloyd

Energy Institute, CPUT

SARETEC, Sachs Circle

Bellville

Tel 021 959 4323

Cell 083 441 5247

PA Nadia 021 959 4330

From: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of
Paul Medwell
Sent: Friday, September 2, 2016 4:12 AM
To: Discussion of biomass cooking stoves
Subject: Re: [Stoves] Hypothesis for Wonderwerk TLUD-ND

Dear Kirk, Paul and all,

Kirk: thanks for circulating your hypothesis. This seems well-founded.
Paul: measuring long-chain hydrocarbons / tars is part of the planned
project of PhD student Thomas Kirch.

The intention is to measure the tars fairly soon. The catch is that our
existing micro-GC isn't suitable for this, and finding someone who is
willing to put our tars in their GC-MS is proving difficult. Until we get
funds to buy our own, any suggestions for other ways of characterising the
tars?

Cheers,
Paul

On 1/09/2016 10:53 PM, Paul Anderson wrote:

Kirk,

The Wonderwerk Man has again done wonderful work!!!!   Stove Summit, Stove
Camp, assisting Dennis (who then won the Cat Pee award), and cooking with
Flip.  It is always a pleasure being with you.

The hypothesis (explanatory document) is well done.  All serious stove
researchers should read it.  Where is this document being placed for public
access.   I offer to place it at the    drtlud.com   website.  (Send your
reply to James Schoner directly or via the Stoves Listserv; I will be in
Mexico for the next 13 days).

Hypotheses are statements that ask to be confirmed.  The folks with the
scientific equipment can now step in and see if the long-chain hydrocarbons
are indeed breaking up when and where indicated by the hypothesis.  Good if
that could be soon, but I expect not.  In the meantime, the excellent low
emissions (which are facts, not hypotheses) speak for themselves.

The needed scientific studies would help answer several questions such as
whether all three steps (levels) are needed to accomplish the low emissions
and the ability for turn-down to low fire.

About turndown such as when cooking in Flip's oven, a different solution is
to have a second gasifier reactor (fuel chamber) that has a smaller
diameter.

Keep up the good work!!   (werk)

Paul

Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD
Email:  psanders at ilstu.edu
Skype:   paultlud    Phone: +1-309-452-7072
Website:  www.drtlud.com

On 9/1/2016 12:34 AM, kgharris wrote:

All,

Talking about stoves at the InStove Stove Summit and Aprovecho Stove Camp
made me think through the workings of our Wonderwerk TLUD-ND.  I needed to
create a working hypothesis of why it burns as cleanly as it does.  Attached
is the hypothesis.  It may not be completely correct, but it does provide an
explaination, or at least a place to start an explaination.  There is a lot
that I don't know about this burning method and a lot of work left to be
done.

At Stove Camp, Sam Bentson, Aprovecho's lab engineer offered to help me
probe into the pressure variations in the stove.  I was sadly involved with
too many things to take him up on it.  My loss!  What I did do was to
support Dennis, a visiting student from China, in his development of a wok
support with skirt and chimney.   He tested it on top of the latest
Wonderwerk TLUD-ND stove and the results were impressive.  He made several
adjustments to the dimensions which seemed to improve its performance even
more.  He required only high power and no turn-down.

After Stove Camp I visited with Jon and Flip Anderson.  We put an older
Wonderwerk TLUD-ND under one of their clay ovens, and baked a cake.  It
required two fuel (vertically arranged split sticks of an unknown variety of
hardwood) loadings of the stove, the first to heat the oven and give about
30 minutes of baking and the second finished the 1 hour baking time.  This
showed the need for turn-down capability for oven baking.  The latest
Wonderwerk stove, which I had left at Aprovecho, would very likely have done
it with only one load of fuel, because of better turn-down and more
efficient burning.

I hope you enjoy looking through the hypothesis.

Kirk H.

Santa Rosa, CA. USA

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