[Stoves] Fan-blaster Combustors, Stove Camp 2006, and the Dell-Point Pellet Stove

[Crispin]

Dear Kevin

>It would appear that the "fan blaster" is simply one or a number
>of ways to provide overfire air, secondary air, and a mixing effect.

Correct.

I guess you could do it with air injection, a rotating blade, stack draw or
stack push, steam as a stirrer, steam running in an air injector and I think
I saw once a way of getting steam to inject air without getting the steam
into at least part of the air which was taken to one side.

I think John Davies uses the skin around the fuel bed to pick up heat and
then a perforated cone to blow that hot air downwards onto the top of the
fire.  When the draft is correct, it is completely smokeless burning black
(i.e. not hot) coal from the top downwards.  The centre of the cone is open
for the upward exit of gases to the chimney.

I believe it works because the draft is sufficient to burn well.  A
downward-blowing fan would create the same condition without the need for a
chimney.  The amount of fuel in the chamber is not, I feel, relevant.  It
could be a cup or a ton depending on how long the burn needed to be between
fuelings.

It might be possible with sufficient draft to get the ash to fly out to top,
which means the top-lit updraft burn could be sustained by feeding in fuel
mechanically from below, lifting the fuel bed.

Regards
Crispin



___________________________________________________________
$0 Web Hosting with up to 200MB web space, 1000 MB Transfer
10 Personalized POP and Web E-mail Accounts, and much more.
Signup at www.doteasy.com