[Stoves] Making testing equipment for CO and O2

[Crispin Pemberton-Pigott]

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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