[Stoves] RE Adding a fan

[Tom Miles]

See pictures and performance of Dean's prototype Rocket Stove with Fan at
www.bioenergylists.org

Tom Miles



-----Original Message-----
From: stoves-bounces at listserv.repp.org
[mailto:stoves-bounces at listserv.repp.org] On Behalf Of Dean Still
Sent: Saturday, May 20, 2006 8:02 PM
To: 'STOVES'
Subject: RE: [Stoves] RE Adding a fan

Dear Kevin,

Answering in CAPS in your text below. THESE ANSWERS ALL BEGIN WITH: IN MY
HUMBLE OPINION!

-----Original Message-----
From: Kevin Chisholm [mailto:kchisholm at ca.inter.net] 
Sent: Saturday, May 20, 2006 5:31 PM
To: Dean Still; 'STOVES'
Subject: Re: [Stoves] RE Adding a fan

Dear Dean
...del...>
> For me research is directed by the goal of a most helpful $2-$5 stove.

What areas of the World require a $2-$5 stove? What about if it ended up 
costing $10?

I THINK THAT THERE ARE FOLKS WHO ARE BEST SERVED BY A TEN DOLLAR STOVE BUT
THAT THE BASE OF THE PYRAMID IS BETWEEN TWO TO FIVE DOLLARS. HOPE THAT I'M
BEING PESSIMISTIC.

Does this assume an "owner built stove", or is there an allowance for them 
to be made locally, and sold to local people?

I AM THINKING ABOUT FACTORY MADE STOVES FOR SALE AT A RETAIL LEVEL.

 So
> far that seems to include, not in order:
>
> Cooks like how it cooks food

Could you outline what they like, and what they don't like about "how it 
cooks food?"

IT VARIES SO A STOVE HAS TO BE DESIGNED PER AREA.

> Side fed long sticks

What would be the range in diameter of teh sticks, and teh range in poisture

contents?

SAME AS ABOVE.

> Fast to boil
What is their perception of "fast to boil?"

AT LEAST AS FAST AS THE OPEN FIRE SAY ABOUT 25 MINUTES TO BOIL 5 LITRES.

> Fuel efficient to simmer (good turndown)
What would be an acceptable turn-down ratio? What is teh maximum targeted 
heat input rate, and what is the heat input rate required for simmering?
FOUR TO SIX THOUSAND WATTS FOR HIGH POWER. ONE THIRD THAT AT LOW POWER.
> Safe
What are the criteria to be met for the stove to be termed "safe?"
NO BURNS, DOESN'T TIP OVER, ETC.

> When used does not damage health of user (ventilation helps a lot here!!)
Are tehre any stoves that vent inside teh living space that do not damage 
health?

IF THERE IS A LOT OF VENTILATION A REALLY CLEAN BURNING STOVE CAN BE USED
INDOORS WITHOUT IMMEDIATE HEALTH EFFECTS BUT UNVENTED STOVES SHOULD ONLY BE
USED UNDER A VERANDA, ETC. STOVES WITH CHIMNEYS CAN REMOVE ESSENTIALLY ALL
POLLUTION FROM THE ROOM.

> $2-$5
Could you please elaborate further on teh $2-$5 cost range target? Is this 
"the cost of materials only, delivered to the site", or does it include a 
labor allowance for building it? What about cost of distributing materials 
to the site? What about the cost of training people how to build and operate

tehm?  etc.
GOOD STOVES CAN BE MADE WITHIN THAT PRICE RANGE WITH PROFITS FOR
MANUFACTURERS AND SALES.

> Long lasting
TWO YEARS?

What is the minimum acceptable number of uses for a $2 to $5 stove?
>MEETS CONSUMERS REQUIREMENTS WHICH VARY.
> 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.

What percentage of the people using a stove like this would have access to 
wall power?

NOT SURE.

Dean, your comments on teh above would be most helpful to us who are "at a 
distance" from the problem. We could get a much better appreciation of what 
you are up against.

Best wishes for every success.
LET'S SUCCEED TOGETHER.

Kevin
>
 

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