[Stoves] Cost of stoves

[Dean Still]

Hi Ron,

Well, Baldwin has some pretty amazing graphs showing firepower/channel
length and gap/thermal efficiency in his book starting on page 45:

http://www.newdawnengineering.com/website/library/Publications/Biomass%20Stoves,%20Engineering%20Design,%20Development%20and%20Dissemination,%20Samuel%20Baldwin%201987.pdf

We have played around with a lot of stove top designs but keeping equal
cross sectional area between stove top and pot is one place to start.
Insulating everywhere in the stove helps a lot to increase temperature of
gases hitting the pot.

Best,

Dean

On Tue, Nov 13, 2012 at 12:18 PM, <rongretlarson at comcast.net> wrote:

> Dean  cc list
>
>    Thanks for bringing up this issue of optimizing the geometry between
> the stove and the cookpot.   Are you aware of anyone who has theoretically
> and/or experimentally determined an optimum spacing?  Presumably the
> optimum is around 1 or 2 cm - and depends on the ratio of pot and flame
> diameters?
>
>    Same for optimum stove top shape.   Presumably here we are returning to
> the issue of radiative heat transfer - trying to avoid sending rays off
> radially that you would prefer to hit the pot.
>
>    You have done a nice job with convective skirts.   Have you seen any
> skirt that had an outer insulating layer?   Any way to optimize the
> geometry  (separation distance from the pot, height, etc)?
>
> Ron
>
>
>
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