[Stoves] RE Adding a fan

[Dean Still]

Dear Crispin,

Adding forced air to a stove is pretty old stuff but yes, "invention" is fun
when you know the idea works...Actually, what I do is really R&D, Larry is
the inventor.

This summer our big push here at the lab is to try to tune the insulated
brick Rocket combustion chamber. It will take a couple of months but I hope
that by testing one change after the next we can cut emissions. 

For me research is directed by the goal of a most helpful $2-$5 stove. So
far that seems to include, not in order:

Cooks like how it cooks food
Side fed long sticks
Fast to boil
Fuel efficient to simmer (good turndown)
Safe
When used does not damage health of user (ventilation helps a lot here!!)
$2-$5
Long lasting

I'll try to figure out if a chimney could generate enough force but I'll bet
that Tom or Paul already know how much force is needed and you can translate
that into chimney height? I think of fans as plugging into the wall because
of the $5 cost but that is most likely limited vision on my part.

Best,

Dean



-----Original Message-----
From: stoves-bounces at listserv.repp.org
[mailto:stoves-bounces at listserv.repp.org] On Behalf Of Crispin at newdawn.sz
Sent: Saturday, May 20, 2006 8:53 AM
To: Stoves
Subject: [Stoves] RE Adding a fan

Dear Dean

Congratulations on this major innovation.  I keep seeing two major 
directions emerging, at least on the research front: gasifiers and fans (or 
both).

The performance figures are really impressive.  Shall we look at clockwork 
fans, or ways of getting small amounts of electric power?

Can you get the same result by using a tall chimney and a sealed pot-stove 
interface?

Regards
Crispin 



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