[Stoves] Excess air

[Andrew Heggie]

On 21 August 2013 18:10, Crispin Pemberton-Pigott
<crispinpigott at gmail.com> wrote:

<snipped>
>
>
> "Excess air is that air over and above the stoichiometric air that is
> supplied in order for all the fuel to be able to "meet" and combine with
> oxygen from the air.
>
>
>
> Only by definition,

I was only addressing the definition
>
>
>


>
>
>    [(O2-(CO/2)]
>
> [21-(O2-(CO/2)]  x 100 = EA%  is the standard formula, in case anyone forgot


I never forgot it because it is no part of the definition, it is a
derivation and makes assumptions about combustion products.

What you are are seeing is vagaries of the way measuring equipment
makes assumptions about how the sensor reacts to the exhaust species
and produces an output.

AJH (with exceeding poor access to the internet at present)