[Stoves] Looking for stove designþ

[vetle.w.cappelen at biomass-stove.no]

Dear Crispin 

The 6 liter Peko Pe stove can be filled with
600 grams of Maize cobs, with 
the sizes of 40-60 mm, it will burn
for about 30 minutes and boil one 
liter of water within 9 minutes
after ignition (6,5 minutes after the pot 
is put on the
"flame"). For normal cooking of Nshima and similar food 
preparing, 30 minutes would be enough for each meal in everyday
use. Cooking Nshima 
need less than 10 minutes so usually they can
prepare most of their 
additional food with one filling. 

We do feel that 6 liter Peko Pe stove is a suitable size for unprocessed

BIOmass wich are most available around the farms. 

Since
they already are cooking with one pot at the time, we don’t think

they need to have more than one stove,. This is off course an
investment cost up for 
discussion for every household. When
less cooking time are needed they can 
just use less
fuel. 

With beans, the farmers will spend more time for
cooking. This can either 
be done by empty the stove and refilling it
with maize or use smaller cobs 
(>10 - 20mm) to get more mass into
the stove (800g = <40 min "flame time") or also by 
using other kind of denser BIOmass. Chopped wood will burn for more than
1 
hour. So far it seems that the farmers are satisfied with both the
size and cooking time. Time will show if adjustment
of stove size are required. 

Since the farmers in
this project are targeted to collect BIOchar from 
maize cobs used
for household energy purpose, they will refill the stove when needed to
get sufficient cooking/energy time. The BIOchar will be stored for later
to be used as soil improvement instead of using it as glowing charcoal.
Wich could be used for additionally >1.5 hours in a traditional
charcoal stove to extend cooking time. However this is not something we
are teaching the users for many different reasons. But we do think they
will figure it out by them self over time and when needed. 

Best Regards 
Vetle Wedelbo Cappelen 

> Dear Vetle

> 
> For how long can they cook with 600 g of maize
cobs?What sort of cooking 
> task can they complete I that
period?Are larger or smaller volume stoves 
> required as
well?Thanks 
> 
> Crispin 
> 
> 


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