[Stoves] Re Alexis Belonio article

[Crispin Pemberton-Pigott]

Dear Andrew

Last first: is it the subject line?  Is this better?

>> That is what I have noted on the FSP stove experiemnts.  As I was
>> able to get the mixing better and better over the course of a
>>year, the flame shortened and got hotter, the CO dropped and I was
>>able to get the excess air down to 100%.

>OK but was the higher temperature down to less losses through the
>shorter flame or simply less massflow because excess air was
>reduced?

Both.  I feel in the case of the FSP stove the conservation of heat by 
bringing the entire flame inside the rather small conbustion chamber added 
most significantly to the temperature increase.  I made it burn really hot 
and clean and then measured the EA which was 100%.  I have not tried to 
lower it further.  The flame temp is 990 measured with an unshielded 
thermocouple.

>I actually don't think you can melt steel with wood as an ideal flame
>will only reach about 1600C, having said that anything over 700C
>will soon burn the steel.

Agreed.  And he already has a problem, looking at the video.

>If it works it works, at the moment I didn't think we had figures for
>water consumption verses excess air?

We don't however I think we can calculate what it should be and then build 
one to prove it is working (probably better given his low efficiency).

Wouldn't it be nice if it was all public info and anyone can use it?  Open 
Source Stoves (OSS) list.

Regards
Crispin