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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