[Stoves] Testing stoves
frank
frank at compostlab.com
Tue Sep 4 18:07:46 EDT 2007
Martin and Stovers of solid, small fuels
I think the best approach is to take stoves that work well with a set
fuel type based on looking at the secondary combustion, low smoke and
how fast the water boils etc. Then take the same fuel type, amount and
packing and have only the primary pyrolysis occur. Not light the
secondary or extend the space between the primary and secondary to keep
it from self igniting. And then analyze the pyrolysis gases on the way
to the secondary and determine the best mix (our goal) for this type of
fuel. Once we know what mix works well we can change the design of the
stove body, burner, fuel packing, primary and secondary air flow and
pattern of the flow.
I am working on such a procedure to measure these gases from a 1000 ml
tedlar bag. I think knowing the test results and comparing to what we
know works will help us to fine tune new stoves using different fuels.
It is slow going.
Frank
Boll, Martin Dr. wrote:
>Dear Frank,
>
>Even, if you want to see the differences caused by (burning) different
>fuels, you can use three identical stoves to test three different fuels
>_At once_: -e.g. fire-balls of different size, density or components-
>
>
>Martin
>
>
>
>
>
>
>>Message: 2
>>Date: Tue, 04 Sep 2007 09:53:16 -0700
>>From: frank <frank at compostlab.com>
>>Subject: Re: [Stoves] TAO-Test (Three At Once)
>>To: Discussion of biomass cooking stoves <stoves at listserv.repp.org>
>>Message-ID: <46DD8D7C.5010301 at compostlab.com>
>>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>>Dear Martin,
>>
>>I think your TAO-test would work fine for developing alcohol, and gas
>>stoves that use a constant product. But you put the 'cart before the
>>horse' when developing the small natural fuel stoves. There are so many
>>variable in small fuels that effect the burn that we first need to
>>organize these differences and design stoves around then (specifically
>>for them) before we can test for the best stove for that fuel. We have a
>>lot of work to do as I see it
>>
>>Regards
>>Frank
>>
>>
>>
>>Boll, Martin Dr. wrote:
>>
>>
>>
>>>Dear fellows of simple-stoves (tincanium, mud, etc.), simple stove-tests
>>>
>>>
>>and
>>
>>
>>>all.
>>>
>>>
>>>
>>>Thinking about differences in woodgas-burning in other topics, I think it
>>>worth to bring my idea of a TAO-Test (Three At Once) to discussion:
>>>
>>>
>>>
>>>It is possibly too simple to mention, -because we all know, that nature
>>>makes it like that-, but I dare to do:
>>>
>>>
>>>
>>>Proposal: Testing of simple stoves by the (-I call it-) three-at-once-
>>>
>>>
>>test
>>
>>
>>>(TAO-test. That means: Three identically stoves, but with (only) one
>>>(small) difference. The best tested of the three leads a step further (I
>>>hope/guess it does in most cases), and so the less-good two stoves have
>>>helped to find the right direction, to go further.
>>>
>>>
>>>
>>>By that: It was helpful to construct those stoves out of changeable
>>>
>>>
>>parts,
>>
>>
>>>to make a new TAO-Test under new conditions easier and quicker.
>>>
>>>So it is possible to draw a "genealogic-tree" of the tested stoves.
>>>
>>>-That includes in my idea changeable parts of clay! (Get them easily
>>>
>>>
>>sealed
>>
>>
>>>with mud, to endure a TAO-test-burn)-
>>>
>>>-Chrispin, from that point of view I asked a lot of months ago about
>>>
>>>
>>forms
>>
>>
>>>to cast stove-parts. You have been elsewhere on travel and you did
>>>
>>>
>>certainly
>>
>>
>>>not get the information. I have to re-look for what I asked precisely-
>>>
>>>
>>>
>>>-In some cases, there could be (tripel/TAO-)tested sectional differences
>>>
>>>
>>in
>>
>>
>>>the round/cercle of the same stove, to determine the favourite
>>>dimension/shape; e.g. for secondary air-holes.
>>>
>>>The favour of the TAO-test is a step (and be it only small.) forward to
>>>
>>>
>>more
>>
>>
>>>perfection (or less misfortune!!) by each triple-test, -without knowing
>>>
>>>
>>in
>>
>>
>>>advance which of the three is the favourite one.
>>>
>>>-By that, it could be helpful to propose some "construction-standards" to
>>>
>>>
>>be
>>
>>
>>>able to connect parts and to compare tests.
>>>
>>>-Possibly working with cans, we had to describe these cans (by measure
>>>
>>>
>>and
>>
>>
>>>forming, and not only by the cans "coffee-name") to be exactly known/used
>>>internationally.
>>>
>>>But that would be task of the specialists and practitioners.
>>>
>>>
>>>
>>>Let us have fun with the small difference(s).
>>>
>>>in stoving!
>>>
>>>
>>>
>>>Martin
>>>
>>>
>>>
>>>
>
>
>
>>--
>>Frank Shields
>>Soil Control Lab
>>42 Hangar way
>>Watsonville, CA 95076
>>(831) 724-5422 tel
>>(831) 724-3188 fax
>>frank at compostlab.com
>>www.compostlab.com
>>
>>
>>
>
>
>
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--
Frank Shields
Soil Control Lab
42 Hangar way
Watsonville, CA 95076
(831) 724-5422 tel
(831) 724-3188 fax
frank at compostlab.com
www.compostlab.com
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