[Stoves] Chinese stove photo sequence

[Frank Shields]

Neil,

You have just outlined the necessary variables that need Limits determined and added stove features to burn biomass. Once that has been done the field workers can characterize the fuels available and we see if your stove would be an appropriate candidate. I don’t think the set of lab tests need be as complicated as it first seems. This is still to be determined. 

Thank-you!

Frank







> On Jan 27, 2017, at 10:57 AM, neiltm at uwclub.net wrote:
> 
> On 27 Jan 2017 at 9:59, Frank Shields 
> wrote:
> 
>> It should rate as 33.5% moisture along with many other characteristics
>> (size, shape, carbon densities etc.). and if the combustion chamber is
>> able to use such fuel with that moisture (not outside the predetermined
>> moisture limits) it should work. We need to pick and set up test methods
>> for determining Limits for different common variables for stove types.
>> Report the range they work. 
> 
> I would find that valuable certainly.  The 
> Reed stoves made no claim as far as I 
> was ever aware.  I discovered the hard 
> way that they were more fuel fussy than 
> the Chinese ND camp stoves which are 
> more forgiving, but at the cost of sooty 
> pans.  Utilising the full fan speed 
> compensated to some useful extent 
> whereby a moderate cooking heat, 
> otherwise obtainable with dry wood on 
> half speed was obtainable.
> 
> I'm not sure how much anyone might 
> consider I have already tested this for 
> this particular stove?
> 
> I don't believe I could get this stove to 
> burn a full load of this wood, as when I 
> tried, this was when I discovered the 
> benefits of the burn once persistence 
> had eventually paid off and that a two 
> thirds load is the maximum I have 
> managed to consume in it, but only by 
> refuelling the top one third of the 
> volume with dry, such that migratory 
> pyrolysis then progresses slowly 
> downwards, but only with further 
> progressively reduced refuelling until a 
> point is reached where it will self 
> sustain somewhere near the bottom.
> 
> Different rules apply for a bottom layer 
> of this wood where the spike would 
> otherwise occur as the bottom of the 
> stove reflects the heat back into the fuel 
> more than a lower layer of wood. I have 
> yet to experiment with 'how wet can it 
> get?' It is that potential that asks a 
> different question than you appear to be 
> asking since it is addressing the 
> flexibility to be able to successfully and 
> even advantageously burn *some* wet 
> wood primarily by exploiting the 
> tendency of the bottom layer to flare 
> once reached, but also by varying 
> overall moisture content as a way to 
> achieve the heat and duration desired 
> where there is no air adjustment by the 
> stove.
> 
> I would be interested to hear if anyone 
> has successfully burned wood with such 
> a high moisture content in a TLUD, or 
> what anyone has designed a TLUD to 
> tolerate?
> 
> 'Carbon densities' I would not know how 
> to determine other than by reporting 
> species and condition of wood.  It 
> occurs to me that one third moisture 
> achieved through partially seasoned or 
> dried green wood might have different 
> burn characteristics, perhaps drying out 
> more slowly in the stove than seasoned, 
> but brittle wood.  Is this what you are 
> referring to by 'carbon densities'?
> 
> In general I have been surprised by how 
> little difference is made by the size of 
> the fuel, certainly compared with 
> varying the moisture.
> 
> Thanks for replying,
> 
> 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