Good site haven't read it threw yet but
Species Density Heat Value
lb/cu. ft. lb/cord BTU/lb Million BTUs/ton Million
BTUs/cord
Willow 23.7 3,034 8,400 16.8
25.2
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
128 cubic feet per cord
e.g. 23,7 lb/cu.ft. x 128 cu.ft./cord = 3034 lb/cord x 8400 BTU/lb = 25,2
Million BTUs/cord
But I can not (unwilling to) stack it that solid so I figure about 70-90
cu.ft./cord
e.g. 23,7 lb/cu.ft. x 80 cu.ft./cord = 1896 lb/cord x 8400 BTU/lb = 15,9
Million BTUs/cord
I think water is 8,345 Lbs US gallon. Outdoor seasoned willow wood might have
10 percent moisture.
23,7 lb/cu.ft. + (8,345 x 10%) = 24,5 lb/cu.ft.
Speaking of wood,
"This source estimates fuelwood consumption in cords per decade,
which were converted to Btu using the conversion factor of 20 million Btu per
cord."
"Energy Consumption in the United States, Selected Years, 1635-1945"
http://www.eia.doe.gov/emeu/aer/txt/tab1801a.htm
I believe the US Forestry estimate sustainable yields @ one cord per acre per
year.
Tree farm hybrid poplar yield 2-4 times that @ 12 million Btu per cord if I am
not mistaken.
Are willow and hybrid poplar related ?? Similiar characteristics.
Aruff -
"Firewood Comparison Table"
Seasoned Wood - BTUs/Cord
http://www.ceramics.com/cvfirewd.html
A book called "SOLID FUELS ENCYCLOPEDIA" by Jay W Shelton ©1983
goes into wood/coal home heating detail for the lay person. His other books
are also interesting.
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