[Stoves] Charcoal and Stoves

[Ronal Larson]

Tom and list:

	Nice comment.  Thanks.  One comment re this sentence (with my added emphases):

		"In the biochar case there can be more benefit from the agronomic uses - reduced cash for fertilizer, reduced labor for watering, improved yield, etc. - than for carbon sequestration.”

	[RWL:  Some (not you) may think these are in opposition.  Not so, one gets both ag and climate benefits, with zero conflict.  And there is more - such as income generation for char-making stove users.  And more.

Ron  


> On Jan 27, 2020, at 4:28 PM, Tom Miles <trmilesjr at gmail.com> wrote:
> 
> If the fuel conversion of the stove is based on performance without char burnout then there is no penalty for removing residual char for other purposes. In the Lifeline cases cited the uses appeared to be essential activities in the household. 
> 
> In the biochar case there can be more benefit from the agronomic uses - reduced cash for fertilizer, reduced labor for watering, improved yield, etc. - than for carbon sequestration. Depending on the application and the fuel it may be more practical to make the biochar in other devices but it may be suited to small garden plots.    
> 
> On Mon, Jan 27, 2020 at 3:15 PM Crispin Pemberton-Pigott <crispinpigott at outlook.com <mailto:crispinpigott at outlook.com>> wrote:
> Thank you Tom.
> 
>  
> 
> For CDM projects, there is no consideration given for the removal of char in the fuel efficiency calculations, which underlies the determine of generation of CER’s.  There easily cold be, but there is not.
> 
>  
> 
> Only a reduction of fuel consumption is considered, and that is field-assessed.  If one were to argue that the char was being sequestered in an inaccessible and permanent manner, one could propose a new rule for the calculation of GHG’s considering retained char.
> 
>  
> 
> The only thing they record for stove projects is fuel mass harvested for cooking.  Obviously there is an implication that the carbon is (largely) released as CO2.
> 
>  
> 
> Regards
> 
> Crispin
> 
>  
> 
> From: Stoves <stoves-bounces at lists.bioenergylists.org <mailto:stoves-bounces at lists.bioenergylists.org>> On Behalf Of Tom Miles
> Sent: Monday, January 27, 2020 17:54
> To: stoves at bioenergylists.org <mailto:stoves at bioenergylists.org>
> Subject: [Stoves] Charcoal and Stoves
> 
>  
> 
> It was an eventful gathering at the ETHOS meeting in Kirkland, Washington, USA, this weekend. Many thanks to Elisa Derby, Nordica MaCarty, the ETHOS board and volunteers for our 20th year celebration. 
> 
>  
> 
> It was apparent to me from the advanced modelling, lab performance data, field tests and field experiences which were reported that charcoal is an important component of household energy and food security. Within the stove charcoal combustion contributes high peak temperatures which can improve performance and reduce emissions. This is demonstrated in the addition of the "Jet-Flame" to a Rocket Stove, which I view as a charcoal burner. By introducing a little pressurized air at the grate you can "low on the coals". The addition of uniformly distributed undergrate air, with even a little pressure, is enough to improve char combustion and shorten the flame, which should indicate increased carbon monoxide burnout. Aprovecho showcased the Jet-Flame at ETHOS. Their testing showed nearly complete charcoal burnout.  
> 
> https://www.chinadaily.com.cn/a/201911/08/WS5dc507d8a310cf3e355763b2_2.html <https://www.chinadaily.com.cn/a/201911/08/WS5dc507d8a310cf3e355763b2_2.html>
>  
> 
> Others from Lifeline said there were circumstances where the charcoal is very important for other uses in the household and that burning out charcoal would not be desired. Someone with a better memory can remind me of what those uses were, 
> 
>  
> 
> Biochar advocates want to make charcoal for use in the soil while cooking, which is usually accomplished by removing charcoal faster than you are consume it. 
> 
>  
> 
> In cases where we want to leave residual charcoal or remove it to make biochar we need to balance the performance benefits of burning the charcoal with the household needs or food security  - biochar - benefits. We have new tools but we need to find out how best to use them. 
> 
>  
> 
> Tom
> 
>  
> 
> --
> 
> T R Miles Technical Consultants, Inc
> Portland, OR 97225
> 
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> 
> -- 
> T R Miles Technical Consultants, Inc
> 1470 SW Woodward Way
> Portland, OR 97225
> tmiles at trmiles.com <mailto:tmiles at trmiles.com>
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