[Stoves] Re Alexis Belonio article

[AJH]

On Fri, 6 Apr 2007 18:29:53 -0400, Crispin Pemberton-Pigott wrote:

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

The subject line is ok but for some reason the reference header has
been stripped, so all your posts archive as fresh starts to threads.

>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.

One of the reports that was posted as a link recently, but I cannot
find it, has a good graphic showing the adiabatic flame temperature
for biomass with varying ash and moisture content as excess air is
varied. It plainly shows the big effect excess air has in comparison
with the modes effect ash has and the more significant effect moisture
content has. It shows that my experience of 150% excess air (2.5 times
stoichiometric air) and 50% moisture content limits the flame
temperature to <900C before any losses through the stove walls.
>
>>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.

You mean because the metal was glowing cherry red? I agree but having
said that it's an impressive performance from rice husks and this
steam aspirator whatever the efficiency.

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

I didn't get the impression it stopped anyone else using similar kit
and data logging the performance??

AJH