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Division 3.3.3.1 Calculation of carbon mass concentration wC

United Kingdom

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As an alternative to the default values in Table 7.3, or where default values are not given for the reference fuel being used, the carbon mass concentration w C may be calculated from measured fuel properties by means of equation (7-82). Values for α and β shall be determined for the fuel and inserted into the equation in all cases, but γ and δ may optionally be set to zero if they are zero in the corresponding line of Table 7.3:

W C = 1 × M C M C + α × M H + β M o + γ × M S + δ M N (7-82)

where:

M C

  • molar mass of carbon.

    • α

  • atomic hydrogen-to-carbon ratio of the mixture of fuel(s) being combusted, weighted by molar consumption.

    • M H

  • molar mass of hydrogen.

    • β

  • atomic oxygen-to-carbon ratio of the mixture of fuel(s) being combusted, weighted by molar consumption.

    • M O

  • molar mass of oxygen.

    • γ

  • atomic sulphur-to-carbon ratio of the mixture of fuel(s) being combusted, weighted by molar consumption.

    • M S

  • molar mass of sulphur.

    • δ

  • atomic nitrogen-to-carbon ratio of the mixture of fuel(s) being combusted, weighted by molar consumption.

    • M N

  • molar mass of nitrogen.