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  • The Real Urban Emissions Methodology (1)

    • Reference: 2019/0215
    • Question by: David Kurten
    • Meeting date: 17 January 2019
    The methodology used by The Real Urban Emissions Initiative to calculate fuel specific emissions introduces a factor of 6 to the concentration of hydrocarbons with no explanation at the top of the second column of page 4 of its report in the equation a + 6 c + d = 1. Do you know what is the purpose of introducing a factor of 6 at this point in the calculation process? https://www.trueinitiative.org/media/596931/true_remote_sensing_data.pdf

  • The Real Urban Emissions Methodology (2)

    • Reference: 2019/0216
    • Question by: David Kurten
    • Meeting date: 17 January 2019
    The methodology used by The Real Urban Emissions Initiative seems to assume that all of the gaseous hydrocarbons measured are propene (C 3 H 6 ) given the equation on page 4 which states: CH r + m (0.21 O 2 + 0.79 N 2 ) aCO + bH 2 O + c ( C 3 H 6 + unmeasured C 3 H 6 ) + dCO 2 + eNO + fNO 2 + (0.79 m - ( e + f )/2) N 2 Do you know the reasoning behind this assumption that all of the hydrocarbons measured were C­...

  • The Real Urban Emissions Methodology (3)

    • Reference: 2019/0217
    • Question by: David Kurten
    • Meeting date: 17 January 2019
    The methodology used by The Real Urban Emissions Initiative to calculate fuel specific emissions assumes in reference 10 on page 4 that the concentration of unmeasured hydrocarbons is equal to the concentration of measured hydrocarbons (propene) emanating from vehicle exhausts, but no explanation is provided for this assumption. What proof do you have that this assumption is correct? Do you agree that if this assumption is false, then all of the calculated data are also false?

  • The Real Urban Emissions Methodology (4)

    • Reference: 2019/0218
    • Question by: David Kurten
    • Meeting date: 17 January 2019
    Reference 16 of the calculation methodology used by states that The Real Urban Emissions Initiative “NO emissions use the NO 2 molar mass since all emitted NO will eventually oxidize in the atmosphere”, despite the fact that NO is far more prevalent in exhaust emissions than NO 2 . Do you recognise that it is dishonest and poor scientific practice to quote results in terms of NO x per kg or g NO x per km, when they are actually presenting calculated figures for grams of NO 2 per kg or g NO 2 per km, which adds up to...