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Home  >>  Customers  >>  Coal  >>  Glossary

Glossary of Terms

Various Formulas

• To find the energy cost of coal on a cents-per-million Btu (¢/mmBtu) basis:
Given: Delivered price ($/ton), Heating value of coal (Btu/lb)

Energy cost (¢/mmBtu) = (Delivered price ($/ton) x 50,000) / Heating value of coal (Btu/lb)

• To find the delivered price on a $/ton basis:
Given: Cost (¢/mmBtu), Heating value of coal (Btu/lb)

Delivered price ($/ton) = (Heating value of coal (Btu/lb) x Cost (¢/mmBtu)) / 50,000

• To find the amount of SO 2 a coal may emit on a lbs/mmBtu basis:
Given: Heating value of coal (Btu/lb), Sulfur content of coal (percent)

SO 2 (lbs/mmBtu) = (Sulfur content (percent) x 20,000) / Heating value of coal (Btu/lb)

• To find the energy content in a barrel of oil on a million Btu's per barrel (mmBtu/bbl) basis:
Given: Heating value of oil (Btu/gal)

Energy content (mmBtu/bbl) = (Heating value of oil (Btu/gal) x 42 (gal/bbl)) / 1,000,000

• To equate the energy content of oil to coal on a barrels per ton (bbl/ton) basis:
Given: Heating value of oil (Btu/gal), Heating value of coal (Btu/lb)

Equivalent amount of oil (bbl/ton) = (Heating value of coal (Btu/lb) x 2000 (lb/ton)) / Heating value of oil (Btu/gal) x 42 (gal/bbl)

• To determine the density of a material on a pound per cubic foot (lb/ft 3 ) basis:
Given: Specific gravity of the material

Density (lb/ft 3 ) = Specific gravity x 62.43

• To find the energy cost of gas on a ¢/mmBtu basis:
Given: Delivered price ($/mcf), heating value of gas (Btu/ft 3 )

Energy cost(¢/mmBtu) = (Delivered price ($/mcf) x 100,000) / Heating value of gas (Btu/ft 3 )

• To find the energy cost of oil on a ¢/mmBtu basis:
Given: Delivered price ($/bbl), heating value of oil (Btu/gal)

Energy cost (¢/mmBtu) = (Delivered price ($/bbl) x 2,380,952.38) / Heating value of oil (Btu/gal)

• To find the energy content in a ton of coal on a mmBtu/ton basis:
Given: Heating value of coal (Btu/lb)

Energy content (mmBtu/ton) = (Heating value of coal (Btu/lb)) / 500

• To find the energy content in a mcf of gas on a mmBtu/mcf basis:
Given: Heating value of gas (Btu/ft 3 )

Energy content (mmBtu/mcf) = (Heating value of gas (Btu/ft 3 )) / 1,000