Here are some random fuel weights, densities, and equivalents which I am always looking for. If I am always looking for them they will probably benefit other people as well.
Heat of combustion for “dead dry” wood – 8600 Btu/lb
Heat of combustion for 9% moisture barn dried chips – 7863 Btu/lb
Internal volume of a “5 gallon Home Depot bucket” – .73 ft^3
Weight of dry chips in a Home Depot Pail – 6.5 lbs.
Gasoline non condensing heat of combustion – 20,000 Btu/lb
Dry hardwood chip density – 8.94 lb/ft^3
A Home Depot pail of 9% moisture chips contains the same chemical energy as .43 gallons of gasoline if converted in a perfect gasifier. In a typical 70% efficient gasifier the pail contains the equivalent of .3 gallons of gasoline.
For quick math, a Home Depot pail of air dried chips is equivalent to a quart of gasoline.
Therefore for a 292cc 5kw generator requiring 6 gallons of gasoline every 9 hours, you will need:
(6 gal/9 hr)*(4 pails /gallon)*(24hr/day) = 64 Home Depot pails of chips per day
Now if you lose half your available energy making charcoal…….think about 128 pails of chips. Yikes!
Density – 648 g/l or 40.45 lb/ft^3
A Home Depot pail is equivalent to:
(40.45/8.94)=4.52 quarts of gasoline per Home Depot pail.