[Stoves] Making testing equipment for CO and O2

[Lanny Henson]

Thanks Crispin,
I was very impresses with you knowledge of stoves and your presentation 
about stove testing at ETHOS.
Lanny Henson
----- Original Message ----- 
From: "Crispin Pemberton-Pigott" <crispinpigott at gmail.com>
To: "'Discussion of biomass cooking stoves'" <stoves at listserv.repp.org>
Sent: Sunday, February 03, 2008 6:20 PM
Subject: Re: [Stoves] Making testing equipment for CO and O2


> Dear Lanny
>
> You can calculate combustion efficiency, dilution and CO/CO2 ratio from CO
> and one of either O2 or CO2.
>
> Certain assumptions have to be made to do it (so it is not totally 
> accurate)
> but you can get a really good approximation.
>
> There is a known amount of O2 in the air. 20.95% normally. What comes out 
> of
> a stove is a mix of products.
>
> It is assumed in this case that H2 is all burned (which in a really bad
> stove is not true).
>
> It is assumed that all sulphur is burned to SO2, if you know of any.  This
> uses a small amount of O2 but normally none with wood.
>
> It is assumed that CO is measured directly.
>
> It is assumed that any O2 that is missing, when counting the CO and the O2
> in the gases is CO2.
>
> Alternatively any CO + CO2 accounts for some of the O2 and the rest is 
> still
> in the stack in the form of excess air.
>
> That is how it works.  The calculations made are in the appendix at the 
> back
> of the instruction books for all TSI products which can be downloaded from
> www.tsi.com
>
> And that is how it works.
>
> Regards
> Crispin
>
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>
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