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Annual Danish informative inventory report to UNECE. Emission ...

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The standard approach <strong>to</strong> achieve a fuel balance in annual emission inven<strong>to</strong>ries<br />

is <strong>to</strong> multiply the annual mileage with a fuel balance fac<strong>to</strong>r<br />

derived as the ratio between simulated and statistical fuel figures for<br />

gasoline and diesel, respectively. This method is also used in the present<br />

model.<br />

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1,40<br />

1,20<br />

1,00<br />

0,80<br />

0,60<br />

0,40<br />

0,20<br />

0,00<br />

)XHO VFDOH IDFWRUV EDVHG RQ IXHO VDOHV<br />

1985<br />

1987<br />

1989<br />

1991<br />

1993<br />

1995<br />

1997<br />

1999<br />

2001<br />

2003<br />

2005<br />

2007<br />

2009<br />

Gasoline Diesel<br />

Figure 3.85 DEA:NERI Fuel ratios and diesel mileage adjustment fac<strong>to</strong>r based on<br />

DEA fuel sales data and NERI fuel consumption estimates.<br />

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)XHO VFDOH IDFWRUV EDVHG RQ IXHO FRQVXPSWLRQ<br />

1,40<br />

1,20<br />

1,00<br />

0,80<br />

0,60<br />

0,40<br />

0,20<br />

0,00<br />

1985<br />

1987<br />

1989<br />

1991<br />

1993<br />

1995<br />

1997<br />

1999<br />

2001<br />

2003<br />

2005<br />

2007<br />

2009<br />

Gasoline Diesel<br />

Figure 3.86 DEA:NERI Fuel ratios and diesel mileage adjustment fac<strong>to</strong>r based on<br />

DEA fuel consumption data and NERI fuel consumption estimates.<br />

In the figures 3.85 and 3.86 the COPERT IV:DEA gasoline and diesel<br />

fuel use ratios are shown for fuel sales and fuel consumption from 1985-<br />

2009. The data behind the figures are also listed in Annex 3.B.8. The fuel<br />

consumption figures are related <strong>to</strong> the traffic on <strong>Danish</strong> roads by <strong>Danish</strong><br />

vehicles and foreign trucks.<br />

Pr fuel type, all mileage numbers are equally scaled in order <strong>to</strong> obtain<br />

fuel equilibrium, and hence the mileage fac<strong>to</strong>rs used are the reciprocal<br />

values of the COPERT IV:DEA fuel consumption: fuel sales ratio.<br />

The reasons for the differences between DEA sales figures and bot<strong>to</strong>mup<br />

fuel estimates are mostly due <strong>to</strong> a combination of the uncertainties<br />

related <strong>to</strong> COPERT IV fuel use fac<strong>to</strong>rs, allocation of vehicle numbers in<br />

sub-categories, annual mileage, trip speeds and mileage splits for urban,<br />

rural and highway driving conditions.<br />

145

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