Biomass

These helpful conversion factors were published as Appendix B in the US Forest Service Woody Biomass Utilization Guide (2007).

1 green ton (GT) of chips = 2,000 pounds (not adjusted for moisture)

1 bone-dry ton (BDT) of chips = 2,000 dry pounds (assumes no moisture content)

1 bone-dry unit (BDU) of chips = 2,400 dry pounds (assumes no moisture content)

1 unit of chips = 200 cubic feet

1 BDT chips = 2.0 GT (assuming 50 percent moisture content)

1 unit of chips = 1.0 BDT chips

1 CCF (hundred cubic feet) roundwood = 1.0 BDU chips

1 CCF roundwood (logs) = 1.2 BDT chips

1 CCF roundwood (logs) = 1.2 units of chips

1 CCF roundwood (logs) = 1.2 cords roundwood @ 85 cu. ft.

1 Board Foot (BF) = 1 board foot measures 12-in by 12-in by 1-inch thick

1 MBF (thousand board feet) = 1,000 BF

1 GT (green ton) of logs = 160 BF of lumber

6 GT (green ton) of logs = 1 MBF

1 Standard chip van carries 25 green tons, or approximately 12.5 bone-dry tons (BDT) assuming 50 percent moisture content

When woody biomass is utilized in a commercial-scale (10+ megawatt (MW) electrical output) power generation facility, the following energy output rules of thumb apply:

  • 1 BDT fuel will produce 10,000 pounds of steam
  • 10,000 pounds of steam will generate 1 megawatt hour (MWH) of electricity
  • 1 MW = 1,000 horsepower
  • 1 MW = Power for approximately 750 to 1,000 homes

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