Power of batch boxes?

[Deleted]

hello
I am a new user and I live in Italy

I found this site very interesting ... I would like to build a rocket stove ...

I would like to understand the power depending on the size of the combustion chambers?
This would be very important for me !!!

Thank you very much and good luck

I do not write very well in English ... sorry

[photoman290]

there is a link on here to the 8 inch batch box built at the permies conference. somewhere there is the formula for calculating the energy in the load of wood. i seem to recall 12 kgs of dry wood is around 50kw

[Deleted]

photoman290

thank you very much ... I tried to search the thread you mentioned but I have not found it .... I need to have about max 20-25kw. A combustion chamber 6 "might be?

thanks

[Deleted]

Peter
I did not understand the power of each combustion chamber. Could you please give me the indication. I would like to build a stove to your specification and testing but it is necessary for me to know the power involved.
thank you
best regards

[radek]

the 6inch or 15cm batch box will give you around 27-30Kwh

[Deleted]

Thanks ...

as time burns over 1h or 2h?

thanks

[pinhead]

It seems that in most batch boxes, a single load generally burns for roughly 40 to 45 minutes, though the burn can be lengthened or shortened by loading thicker or thinner pieces of wood.

[Deleted]

uaoooo .. I seem to many kw in 45 minutes. I thought that power was burned in at least 2 hours.
I would love to get feedback from those who have tried it ... maybe if you could confirm Peterberg go on the safe side !!!

thanks

best regards

[matthewwalker]

Nov 7, 2014 12:41:36 GMT -8 radek said:

the 6inch or 15cm batch box will give you around 27-30Kwh

This measurement is Kilowatt/hour.

[peterberg]

OK then, a given combination of 150 mm batch box, chimney and fuel type is able to yield something between 15 and 25 kW/h. An average burn will last for about an hour, including the glowing phase. Larger and denser pieces of fuel will last a bit longer. This numbers are irrespective of how much fuel is in the firebox to begin with. So half a load will take the same time as a full load, in the latter case the power delivered is roughly twice as large. The above numbers are reflecting maximum load.

[Deleted]

Thank you very much Mr Peter. Then I can do ... I'm also interested in having an objective, because I tried it with a d. 4 "with a configuration designed by me ... and I made a few numbers which then helped me to lay a sheet in excel where I attach a print screen .... With his answer he confirmed that some of the results as seen are quite reliable for the 6 "(at least I hope) but I found a discrepancy with the 4" because the flue gas flow remains laminar unless you raise considerably the fireplace !!! (maybe I missed something in my spreadsheet)

Thanks again and good luck

I do not know how to attack the file ... after I try to see how to do it !!! or if anyone can help me I would be grateful

Best regards

[Deleted]

ok ... should work

imageshack.com/i/iqqK9ae6j
imageshack.com/i/eyjVg1QXj
imageshack.com/i/id2prXkXj
imageshack.com/i/idKHdDTij
imageshack.com/i/p8XAclNcj
imageshack.com/i/f0xuFOFXj

[satamax]

Image shack doesn't work for me!

[docbb]

[Deleted]

attention
I still do not consider it reliable ... in development
have yet to be implemented on the load losses throat & exchanger !!!

best regards

AG