alt.energy.homepower

On 3 Aug 2007 07:53:21 -0400, nicksanspam@ wrote:
>Trygve Lillefosse wrote:
>>Depending on its shape, the pile should be somewhere between 3,5 m3
>>and 4m3, if it contains 30% air, it should at least amount to 2500
>>kWh. With 70% efficiency in the oven, this is about 1750 kWh of heat,
>>In my house, i assume that it would probarbly last for 3 months
>>(19kWh/day).
>>Since I calculated with half the energy of completely dry wood, it
>>should give even more if properly dried,
>Dry compost has 8-12K Btu/lb, but composting works best with 50% moisture
>by weight and a 25:1 C/N ratio and at least 10% oxygen at 130 F min. You
>might enjoy a "composting furnace," eg a closed vessel with a humidistat
>and a soaker hose and a small blower, with warm moist air as an output
>and a condensing heat exchanger.

Do you get more heat from the wood if you compost it, than the
theoretical energy you get from burning it?

At zero percent moisture, one kilo of wood contains Kwh or 18820
Btu, one kilo is pounds. One pound of woods comes out at 8555 Btu
if it is 100% dry and are burned at 100% efficiency.

--
SEE YA !!!
Trygve Lillefosse
AKA - Malawi, The Fisher King