[Stoves] SPAM Re: SPAM Dung Rocket Stove - Failed Test

Sat Jan 14 12:45:43 CST 2023

Below are three photos of a dung stove I saw in Mongolia in 2007.  It 
had a chimney, and the cook prepared a variety of cheese products with 
this stove.   There is not much wood to burn in Mongolia.

Paul Arveson

On 1/6/2023 7:09 PM, Ronal Larson wrote:
> Kevin, Paul et al:
>
> 1.  Wow. 2 billion dung-stove  users!.  I had not been paying 
> attention to the large number combusting dung  -  and do agree we 
> should be trying to improve its combustion in cookstoves. It might 
> even be possible to make them fairly clean.
>
> 2.   But I think it much better to promote a switch to charcoal-making 
> stoves.   Not just for dung, but for every fuel.  Guaranteed to be 
> cleaner, but also money making because of application of the char to 
> agriculture.  And we need urgently to be practicing carbon dioxide 
> removal (CDR).
>
> 3.   Re TLUDs and dung, I found TLIUD support in this 2014 non-fee 
> paper: A Biochar-producing, Dung-burning Cookstove for Humanitarian 
> Purposes☆ 
> <https://www.sciencedirect.com/science/article/pii/S1877705814010509?ref=pdf_download&fr=RR-2&rr=78585566ce291f39#aep-article-footnote-id3> 
>
> https://www.sciencedirect.com/science/article/pii/S1877705814010509?ref=pdf_download&fr=RR-2&rr=78585566ce291f39 
> <https://www.sciencedirect.com/science/article/pii/S1877705814010509?ref=pdf_download&fr=RR-2&rr=78585566ce291f39> 
>
>
> 4.   They used dung from a zoo - and found giraffe dung the best.   I 
> did have occasion recently to also see some giraffe dung at the Denver 
> zoo.   Really a wonderful size, shape and uniformity with giraffe dung 
> .  Unfortunately giraffes are also a releaser of enteric methane.
> Lots of good combined methane and dung data at this site:
> https://www.tandfonline.com/doi/pdf/10.3402/tellusb.v38i3-4.15135
> Maybe we can promote conversion to the dung of non-ruminants - such as 
> warthogs?
>
> 5.  And hope we can all agree with Paul Olivier - on eventual no 
> combustion of dung of any type.   But I  may still be promoting more 
> pyrolysis of dung - to sped up carbon content increase in soils.
>
> Ron
>
>
>> On Jan 6, 2023, at 2:12 AM, Kevin McLean <kevin at sun24.org> wrote:
>>
>> Paul, Ron,
>>
>> The only site I can find on the number of people relying on dung as a 
>> cooking fuel says it is two billion people 
>> <https://energypedia.info/wiki/Cooking_with_Dung#cite_note-Solid_Biofuels_http:.2F.2Fbiofuel.org.uk.2Fsolid-biofuels.html-1>. 
>> I doubt it is this high, but it's probably in the hundreds of 
>> millions.  Most are probably in South Asia.
>>
>> Cooking with dung is exceptionally dirty.  This soot contains black 
>> carbon, a powerful climate forcer.  And this soot contributes to air 
>> pollution.
>>
>> I'm working with a group that is trying to slow glacial melt in the 
>> Himalayas.  Soot landing on glaciers is a primary cause of glacial 
>> melt.  Some think that cooking with biomass may be the primary source 
>> of soot that lands on Himalayan glaciers.
>>
>> I agree that there are better uses of dung.  And I agree that it 
>> would be best if everyone used cooking methods that are cleaner than 
>> burning dung.  But the fact is that many millions of families will 
>> continue to cook with dung indefinitely.  It would be good if we can 
>> make cooking with dung cleaner and more efficient until these 
>> families transition to something better.
>>
>> Kevin
>>
>> On Thu, Jan 5, 2023 at 11:59 PM Ronal Larson 
>> <rongretlarson at comcast.net> wrote:
>>
>>     Kevin,  Paul and stoves list
>>
>>     1. What is the reason for this test of a rocket - instead of a
>>     TLUD or other char-making design?
>>
>>     2. I agree with Paul, but I can conceive of cost, time spent,
>>      and CDR advantages of charring dung, at lest with certain family
>>     situations. But I can’t see those advantages with combusting dung.
>>
>>     Ron
>>
>>>     On Jan 5, 2023, at 9:57 AM, Paul Olivier
>>>     <paul.olivier at esrla.com> wrote:
>>>
>>>     Dung is not a good fuel.
>>>     It is much better to ferment it and use it as a feed.
>>>
>>>     On Thu, Jan 5, 2023 at 10:12 PM Kevin McLean <kevin at sun24.org>
>>>     wrote:
>>>
>>>         List,
>>>
>>>         Today we tested a dung rocket stove. I'm a little surprised
>>>         that the test was a failure.  Can anyone suggest changes? 
>>>         And can anyone in India help us with our testing of dung as
>>>         fuel?
>>>
>>>         This is very similar to a sawdust cookstove.  We made
>>>         cylinders of dung with vertical holes in the center and let
>>>         them dry for a month.  We did not mix anything into the
>>>         dung.  We used 5 liter paint cans to form the cylinders.
>>>
>>>         <Dung rocket stove - wet.jpeg>
>>>         <Dung cylinder - Failed test.jpeg>
>>>
>>>         We tested with and without a metal can over the dung
>>>         cylinder.  We raised the cylinder and lit a wood fire under
>>>         it.  The fire was never strong and there was a lot of
>>>         smoke.  Here is a video
>>>         <https://drive.google.com/file/d/1xCrABfFFOVlvtGn925VW8FT9lXl660Zk/view?usp=share_link> of
>>>         the test with a metal can over the dung cylinder.
>>>
>>>         We seem to be having early success with upright dung sticks
>>>         in a metal band and top lighting piles of dung patties.  But
>>>         these need to be tested by people more familiar with using
>>>         dung as fuel.
>>>
>>>         <Dung sticks in a metal band.jpeg>
>>>         <TDB of pile of dung patties.jpeg>
>>>
>>>         We could use some help from someone in an area where dung is
>>>         used for cooking.  None of my colleagues live in such an area.
>>>
>>>         Thanks,
>>>         Kevin
>>>
>>>         Kevin McLean, President
>>>         Sun24.org <http://sun24.org/>
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>>>
>>>
>>>     -- 
>>>     Paul A. Olivier PhD
>>>     104/43 Phu Dong Thien Vuong
>>>     Dalat
>>>     Vietnam
>>>
>>>     Louisiana telephone: 1-337-447-4124 (rings Vietnam)
>>>     Mobile: 090-694-1573 (in Vietnam)
>>>     Skype address: Xpolivier
>>>     http://epwt.vn/en/home/
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>>
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>
>
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[Stoves] ***SPAM*** Re: ***SPAM*** Dung Rocket Stove - Failed Test

[Stoves] SPAM Re: SPAM Dung Rocket Stove - Failed Test