[Stoves] Recorded EPA webinar and files posted/ wood size

[Lanny Henson]

I would like to see wood at least 15 cm/6 inches long being used in future 
test.

I noticed the size of the wood In the test is 2 x 2 and  2-7.63 cm long. 
That translates to about ¾" x ¾" and  ¾" to 3" long, for my fellow 
"meterphobics" (unnatural fear of the metric system)

7.63 cm is very small wood and It takes a lot of work to cut wood down to 
that size. It is not the diameter that is a problem because wood is easily 
split to smaller diameters but the length of  ¾' to 3" is a problem because 
the cross cut is more difficult.

I have seen comments that users do not like to cut wood down to small pieces 
so I wonder how practical a household size stove is going to be unless it is 
flexible enough to burn larger size wood.

Even 15 cm may be too short for some end users. If I am wrong about the 
small wood problem please let me know.

The problem with designing a  batch-fueled stove that will burn 6" long 
wood, is that it is more of a  challenge than a stove that will only burn 
wood  3" long,  because the size of the burner needs to be different. Wood 
needs to lay horizontally with the grain when being burned in a batch, 
because wood does not burn well standing on the end.  It reacts all at once 
and the burn is not steady and continuous, like it is when the pieces are 
laying horizontally. Laying horizontally and top lit the pieces burn a few 
at time as the flame burns down through the fuel bed in more steady way, 
with less heat spikes and dips.  The taller the stack the better for the 
same reason.

I am working on a burner that will hold 1Kg of 6" long wood. It is oval to 
hold the longer pieces but narrow so the wood will make a taller stack. It 
burns the wood from both ends and there is no grate or even a bottom to the 
stove. This is very handy for saving the charcoal, just lift the stove off 
and lay a cap over the pile of charcoal on the ground to extinguish it. When 
I am able to walk again I will take some photos
Lanny


----- Original Message ----- 
From: "Jetter, James" <Jetter.Jim at epa.gov>
To: <stoves at lists.bioenergylists.org>
Sent: Saturday, September 21, 2013 5:35 PM
Subject: [Stoves] Recorded EPA webinar and files posted


> To All,
>
> Thanks to those who joined us for the webinar on August 29, and thanks to 
> the Global Alliance for Clean Cookstoves for hosting.
>
> The recorded webinar, presentation slides with notes, and draft 
> spreadsheet have been posted for your information, review, and comments:
> http://community.cleancookstoves.org/communities/forums/viewtopic/22/33/207?post_id=357#p357
>
> The purpose of the webinar was to:
>   Provide an update on the EPA cookstove testing project
>   Present a format (EPA spreadsheet) for sharing data
>   Discuss test methods
>   Focus on example testing results for a batch-fueled pyrolytic TLUD 
> (top-lit up-draft) stove
>   Solicit further comments on methods, spreadsheet, and data sharing
>
> Please let me know if you have any further comments by Oct. 11.  My email 
> address is: jetter.jim at epa.gov
>
> Regards,
> Jim Jetter
>
>
> _______________________________________________
> Stoves mailing list
>
> to Send a Message to the list, use the email address
> stoves at lists.bioenergylists.org
>
> to UNSUBSCRIBE or Change your List Settings use the web page
> http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
>
> for more Biomass Cooking Stoves,  News and Information see our web site:
> http://stoves.bioenergylists.org/
>
>