[Stoves] Hypothesis for Wonderwerk TLUD-ND

Crispin Pemberton-Pigott crispinpigott at outlook.com
Thu Sep 1 21:25:02 CDT 2016


‎Dear Paul

You could consider asking Dr Zhou (copied) if a student could do the analysis as part of the current work program which includes characterizing fuel content.

Best regards
Crispin

From: Paul Medwell
Sent: Friday, September 2, 2016 08:13
To: Discussion of biomass cooking stoves
Reply 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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>
>
>
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