# Commission Delegated Regulation (EU) 2017/654 of 19 December 2016 supplementing Regulation (EU) 2016/1628 of the European Parliament and of the Council with regard to technical and general requirements relating to emission limits and type-approval for internal combustion engines for non-road mobile machinery, Division 3.3.3.1: Calculation of carbon mass concentration wC

Extent: E+W+S+N.I.

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.

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Source: https://www.legislation.gov.uk/eur/2017/654/annex/VII/division/3/division/3.3/division/3.3.3/division/3.3.3.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-3/division-3.3/division-3.3.3/division-3.3.3.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.