RE: CO meters (again)

["Bryan Willson" <Bryan.Willson@colostate.edu>]

Crispin -

We get around your problem of (separating the change of weight from fuel
consumption vs. water boiloff) by "hanging" the water over the stove, so
that the scale only weighs the stove & fuel.  Obviously, you need to be
careful to keep the water close enough to it's normal position that you
don't change the mode of operation.  We also counterbalance the stove's
weight so that the scale is really only measuring the weight of the wood.
This alleviated the expense of procuring a high-accuracy, high-mass scale.

- Bryan Willson

 Dr. Bryan Willson
 Professor of Mechanical Engineering
 Research Director, Engines & Energy Conversion Laboratory
 Department of Mechanical Engineering
 Colorado State University
 Fort Collins, Colorado  80523-1374
 Phone:  (970)-491-4783
 Mobile: (970)-227-5164
 FAX:    (970)-491-4799
 EECL Web Site: www.engr.colostate.edu\EECL



> -----Original Message-----
> From: Crispin [mailto:crispin@newdawn.sz]
> Sent: Saturday, September 21, 2002 5:09 AM
> To: Stoves
> Subject: RE: CO meters (again)
>
>
> Dear Tami
>
> I am definitely in need of a set (prescribed) rule here.
>
> I do have the capability to weight the entire stove to 2 grams and we do
> watch the fuel burn and the water temp rise. This is very good
> for the short
> time (3 or 4 mintes) until the water starts boiling and then it is a guess
> thereafter because some of the loss is water and some is fuel.
>
> As I want to measure the CO and CO2 from a cold stove being lighted (which
> is when the combustion is worst) I will have to have something that
> stabilizes in a lot less than 11 minutes becase that is three
> times as long
> as a typical test!
>
> While I am interested in what the steady-state burning efficiency is, the
> interesting parts are:
> - lighting up,
> - putting a cold pot onto a hot fire,
> - adding cold fuel to a hot fire and
> - changing the amount of incoming air volume dramatically, either up or
> down.
>
> It is possible to use waste heat from the fire to preheat and dry out more
> fuelwood and if it is worth it, we can do that systematically.
>
> Regards
> Crispin
>
>
>
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http://www.crest.org/articles/static/1/1011975339_7.html Gasification
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