[Stoves] Fuel Testing

[Tom Miles]

Frank,

It occurred to me that this is all done for you in the SHELL FOUNDATION HEH
PROJECT WATER BOILING TEST calculation sheet. Pick your species (from 78)
and fuel mositure and it will give you a net heating value. There are also
sheets for the fuel moisture. It's an excel spreadsheet abvailable at UCB
http://ehs.sph.berkeley.edu/hem/page.asp?id=42 Or see the links at:
http://ceihd.berkeley.edu/heh.stove_perf_eval.htm or
http://bioenergylists.org/en/performance


Also, study the WBT itself and the sources - Baldwin etc. for fuel
characteristics and how they dealt with mositure in the fuel. It will take
you through the net heating value calculation. Also look at Visser and
Prasad's site, Cookstove.net http://cookstove.grensy.info/

Tom Miles


-----Original Message-----
From: stoves-bounces at listserv.repp.org
[mailto:stoves-bounces at listserv.repp.org] On Behalf Of frank at compostlab.com
Sent: Sunday, October 01, 2006 12:05 PM
To: stoves at listserv.repp.org
Subject: [Stoves] Fuel Testing

Dear Stovers,

I'm about to present my 'introduction' formula (in Excel) for the fuels
program.  Only thing left is running a few examples of different fuels
through the program. 

Also; There is a part I would like to add but do not know how and would like
some help. I have the calculations for carbon densities. I think I would
like to subtract from that the carbon needed to remove the water from the
fuel. 

My questions are: If you use dry wood to boil a pot of water and determine
the energy produced. Then take the same type of wood and soak into it, say,
100 mls water and repeat the test is some of the energy in the wood reduced
because of the water or, because the wood will dry during the fire and the
carbon later used, it doesn't make a difference?  If some of the energy
(carbon) in the fuel is needed to first remove the water (cooled to make
steam) is there an estimate of the amount of carbon 'wasted' to remove a
gram of water? Am I thinking about this in the right way?

Thanks

Frank

www.compostlab.com

_______________________________________________
Stoves mailing list
Stoves at listserv.repp.org
http://listserv.repp.org/mailman/listinfo/stoves_listserv.repp.org