[Stoves] Stove testing methods

[CEDESOL Foundation lists]

Dear Kevin,
Thank you for the concise, specific, simple explanations you very kindly 
provided in answer to my original post. 

The information and way it was presented makes it very useful for us to 
incorporate into our thinking.

What kind of winter are you expecting in Canada this year?  We are just 
breaking into spring but the seasons, previously well marked are now 
blurred and we can have rain and chilly winds (by Cochabamba's norm) any 
time now.

I noticed that you designed a 6,000 ft2 wood dryer with solar heat.  Now 
that is something I would really enjoy delving into with you some day!

my best regards
David Whitfield
Kevin Chisholm wrote:
> Dear David
>
> Thank you for your note of Monday, October 02, 2006 9:23 PM. I would 
> suggest that the "back and forth" states our respective views and 
> approaches reasonably well.
>
> Further to your original posting (copy below)...
>
> 1: Combustion Efficiency:
> You can measure combustion efficiency by measuring the percentage of 
> unburned fuel in the flu gas.
>
> (Note that "Combustion Efficiency" is very different from "Stove 
> Efficiency". Combustion Efficiency deals only with the completeness of 
> heat release from the fuel provided, while "Stove Efficiency" can be a 
> combination of Combustion Efficiency and a measure of heat removed in 
> performance of the desired task, or tasks.
>
> 2: Heat Transfer Efficiency is a measure of the percentage of 
> available heat energy that is utilized in performing the desired 
> "stove task".
>
> This does not account for shell losses from the stove to the 
> surroundings. An internal calculation is necessary to account for 
> possible losses due to combustion inefficiency.
>
> Possibly a "Modified Stove Efficiency Test" would be best for your 
> purposes?
>
> If you outlined more specifically what you wishes to accomplish, then 
> perhaps the List could offer specific suggestions.
>
> Best wishes,
>
> Kevin
>
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