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Fossil Fraction

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A cofired generator can operate on a mixture of fossil fuel and biogas. The fossil fraction (xfossil) is the ratio of fossil fuel used by the generator in dual-fuel mode to that required to produce the same output power in pure fossil mode. With compression-ignition (diesel) engines, it is necessary to maintain a minimum fossil fraction to ensure proper ignition.

For a more complete explanation of the fossil fraction and the operation of a cofired generator, see the article Operation of a Cofired Generator.

See also

Generator Minimum Fossil Fraction

Operation of a Cofired Generator