[Stoves] Re Alexis Belonio article

[andrew]

On Thursday 05 April 2007 20:02, Crispin Pemberton-Pigott wrote:
> Dear Andrew
>
> Last first:
> > A shorter flame also has less propensity to lose heat, through
> >radiation.
>
> 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?


> In general I expect 
> Alexis can get the same things, but he will have a materials
> problem right away because it is going to melt everything.

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.

>
> We agreed that there was at least the possibility that having very
> dry fuel mixed with a controlled amount of steam could produce a
> lower emission level in a relatively choked fire, perhaps the EA
> at 25%, which means that one could reduce the excess air
> significantly while still maintaining the clean burn.  This seems
> the most promising possibility, to me.

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

Crispin why does your e-mail client break the threading of these 
posts?


AJH