[Stoves] Pasifier Video

[Alex English]

Crispin, Ron,

The Testo probe for my measurement was at the end of the combustion 
chamber under the cooking surface near but not at the exit where the 
gases flow to the box stove. I don't consider the temperature numbers to 
be an  accurate flow average. Likely a bit on the low side. If I take my 
sample after the box stove I get a lower temperature and lots of excess 
air as the box stove is not tight. There can also be more CO from fire 
remnants in the box stove. I would agree that the system efficiency as 
it is is between 70 and 75% and if there were sufficient heat exchange 
it would easily be 80%. It takes almost half our greenhouse boiler 
surface area to get that last 5%.

As it is, the Testo reads low 70s% efficiency before or after the box stove.

I was surprised to see that it could be as high 65% with just the 
combustion chamber heat loss.

Alex

On 12/03/2012 3:48 PM, Crispin Pemberton-Pigott wrote:
> Efficiency as a heater 100 - 27.92 = 72.08%
>
> I think the Testo 335 can calculate the efficiency. How close is this above
> to the reported value from the Testo?
>
> I am suspicious that the flue temp was not 530 where it left the room. If
> you can provide the actual figure where the heat left the envelope of the
> house I will recalculated it. It is probably in the low 80's.
>
> Regards
> Crispin
>
>
>
> -