Why does the elbow shape help in the more efficient use of the fuel?
Is it simply because you direct the heat towards the cooking area
Or- does the length of the chimney-like vertical part of the stove accommodate a 2nd stage combustion?
Btw we're looking at including the biochar story into the unit and the idea is to combine the rocket stoves with pyrolysis of wood and hence biochar production (in short the Anila stove, probably got that name wrong), and with a bit of luck demonstrate the positives of biochar as well (to give you the full picture).
paul wheaton wrote:
What makes you think that it does?
I think there are two basic kinds of feeds: J-tube and L-tube - both are the way they are to manage fuel stuff.
Hi all, thanks for the useful replies, I think I've got my head around the science side of things.
Coming back to the biochar side of things, a couple of things;
Biochar is a proven improvement to soil structure as was observed in the Amazon basin. It works by absorbing both water and nutrients, giving much higher crop yields. It offers a structure for microbes to prosper.
Production of biochar through pyrolysis yields both gases that can be burned as well as biochar that can be used to improve soil structure.
http://www.theoildrum.com/node/4522 this one is particularly good, watch the you tube clips
yeah you're right the way things are done at the moment is completely insane. Bit by bit people realise the soil has been depleted further and further with the conventional way of fertilizing.
There are people now that use animal manure on a large scale to fertilize their land (duh!). They find they can increase the P levels, much higher and for longer than with the conventional way of fertilizing. On top of that they'll accomplish improved water retention.
Once you get the process going (you need an initial amount of E input) the energy release of pyrolysis is enough for further pyrolysis as well as produce electricity so that's all great. I agree with you that the danger lies in people starting to produce charcoal without using the woodgas released in the process thus increasing the amount of greenhouse gas.
My lessons will concentrate on a 3rd wrld setting for the stoves and all the advantages for the people using them (health, time gained, safety for those collecting wood, less deforestation etc etc)
Will let you know how things go.
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