[Stoves] Question about the turn down ratio

[John Davies]

> Dear  friends,
>
> With so many different uses, stoves and fuels used. I would propose that 
> Crispin,s comparison to automobile testing be taken a step further.
> Just as the fuel comsumption is given for different speeds,I would suggest 
> that the combustion and pot efficiency  be tested at different outputs.
>
> The polution levels are also a very important aspect, so the measurements 
> should always be aimed at a smoke free exhaust, with a maximum upper level 
> of Carbon Monoxide and other unburned carbon compounds. There should 
> further be 3 acceptable levels of unburned politants.  One for stoves with 
> chimneys exhausting outside of the building, one for stoves exhausting 
> within the building with limited ventilation, and one for cooking under a 
> shelter  with 1 complete side open.
>
> .
> A comparison table would look something like this.
> The vertical colums would include the fuel and pot used,combustion and pot 
> efficiency for minimum heat, medium heat, and maximum heat output. 
> followed by the maximum allowable levels of unburned carbon compounds for 
> the 3 different placements of the stove. the horozintal rows would contain 
> the data for each stove tested. If a stove cannot perform smoke free, for 
> 90% of the time, after the initial lighting, then it should not carry the 
> title of improved stove and should not qualify.
>
> A central data base could be gathered which could be used for selecting of 
> sutiatable stoves for  a partiular application.
> Now using the fuel and pot in usual use by a community, several stoves 
> could be selected for evaluation by that community.
> I know that we have a long way to go to reach this ideal, but we should be 
> aiming at this level of cooperation.
>
> John Davies.
>