[Stoves] Hypothesis for Wonderwerk TLUD-ND
Paul Medwell
paul.medwell at adelaide.edu.au
Fri Sep 2 14:22:05 CDT 2016
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 <mailto:psanders at ilstu.edu>
>
> Skype: paultlud Phone: +1-309-452-7072
>
> Website:www.drtlud.com <http://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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