[Stoves] List of woods for TLUDs?

Mon May 1 15:46:04 CDT 2017

Neil,
My point has always been that talk about ‘types of wood’, ‘low density materials’, ‘oily materials’, 'size of primary and secondary holes', 'requirement of fans', 'high ash' etc, etc are all a waste of time as it has been for years with us getting nowhere.  

Its past time we need to quantify the statements. Oily wood - mg oil per kg of wood; density in g/cc, size distribution and shape to determine void space for air movement. Volatile and fixed components, ash, moisture, etc. etc. 

Determining the above is the Test Package I talk about being used on different biomasses. I have done these type of tests for years.  It is about $150 for the package to get the results on a fuel.  I can also teach others how I suggest the testing is done. But that is just the beginning.

Then we work on a specific packed fuels. We need air flow and that is a combination of heat developed in the stove body and void space for air movement. That involves size and shape of fuels and carbon densities and packing densities (for batch systems). This part can get complicated. This I’m thinking can be done in a test chamber that all labs use to ‘compare’ packed fuels. 

Then we work on stoves and determine the best type of fuels for that stove and see what results they give in the test chamber. That so you can go into an area and test the available fuel in the test chamber and see what stoves can use that fuel. Something like that. But first step is testing the parameters of the fuel. 

All the talk of adjusting air holes and what size they should be seems to me to be pointless without a discussion of fuel packing and void space and other information regarding the fuel being used. If we don’t quantify the statements it is all just years and years of more chit-chat. 

Frank

> On May 1, 2017, at 10:47 AM, neiltm at uwclub.net wrote:
> 
> Thanks for these replies.
> 
> Frank, sorry if I've missed something obvious, I've been a bit over 
> occupied with family traumas, but could you please point me towards your 
> test package?
> 
> Thanks,   Neil Taylor
> 
> On 28 Apr 2017 at 13:50, Frank Shields wrote:
> 
>> Hi Neil,
>> 
>> I believe the test package I put together would answer your questions.
>> That because when working on the procedures and selecting the different
>> tests I had what you are referring to in mind. They include test like:
>> Moisture, size distribution, particle shape, particle density, bulk
>> density, void space (for air flow), volatiles and fixed carbon using the
>> pipe method, Ash and ash properties, - I think that is about it as I
>> remember. I had some other ideas using air flowing artificial TMsmokeTM
>> but to lack of interest never followed through. 
>> Then we need to correlate the results from the above tests to determine
>> how they relate to a stove performance. That I never attempted but I do
>> think I have all the methods and tests that is appropriate to do the job.
>> 
>> Regards
>> 
>> Frank
>> 
>> 
>> 
>> 
>> 
>>> On Apr 28, 2017, at 10:01 AM, neiltm at uwclub.net wrote:
>>> 
>>> I live in the UK, so my references below to species of wood are biased
>>> for this part of the world.
>>> 
>>> I have been looking for information about the burn quality of different
>>> woods, but mostly can only find information relating to open fires.
>>> 
>>> Poplar in its various sub species is generally rated low as a desirable
>>> burning wood, and described as 'smoky'.  I just burned some dried
>> Italian 
>>> poplar in the Reed sl woodgas campstove, and although it made a smoky 
>>> start, which was probably down to my lighting technique or lack thereof,
>>> once underway it burned completely smokelessly and with no stinging of
>>> the eyes until just before the end when it again produced some smoke 
>>> briefly.
>>> 
>>> I would like to understand more about the qualities of different woods
>> in 
>>> relation to TLUD stoves and wondered if anyone has ever attempted to 
>>> classify or rate woods for these stoves?  I understand that some woods
>>> like hornbeam, plum, hawthorn are the most dense (highest mass), and 
>>> therefore likely to liberate more heat or a longer burn per batch, and
>>> that woods like willow or poplar are at the lighter end of the
>> spectrum.
>>> 
>>> With poplar in particular I would like to understand why it is a smoky
>>> wood, which it is if you burn it on an open fire?  Should that not mean
>>> it produces more wood gas, thereby making it ideal for TLUDs?  I have
>> yet 
>>> to find a problematic wood for these stoves unless it is our cultivated
>>> apricot in the garden which has always been truly terrible, even when 
>>> dry.  Yet fruit woods are supposed to be prized!
>>> 
>>> Neil Taylor
>>> 
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>> 
>> Thanks
>> 
>> Frank
>> Frank Shields
>> Gabilan Laboratory
>> Keith Day Company, Inc.
>> 1091 Madison Lane
>> Salinas, CA  93907
>> (831) 246-0417 cell
>> (831) 771-0126 office
>> fShields at keithdaycompany.com
>> 
>> 
>> 
>> franke at cruzio.com
>> 
>> 
>> 
>> 
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> 
> 
> 
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Thanks

Frank
Frank Shields
Gabilan Laboratory
Keith Day Company, Inc.
1091 Madison Lane
Salinas, CA  93907
(831) 246-0417 cell
(831) 771-0126 office
fShields at keithdaycompany.com

franke at cruzio.com

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