Report - DCE - Nationalt Center for Miljø og Energi

DEA statistical sectors do not fully match the inventory sectors. This is the
case for non road machinery, where relevant DEA statistical sectors also include
fuel consumed by stationary sources.
In other situations, fuel consumption figures estimated by DCE from specific
bottom-up calculations are regarded as more reliable than DEA reported
sales. This is the case for national sea transport.
In the following the transferral of fuel consumption data from DEA statistics
into inventory relevant categories is explained for national sea transport and
fisheries, non road machinery and recreational craft, and road transport. A
full list of all fuel consumption data, DEA figures as well as intermediate
fuel consumption data, and final inventory input figures is shown in Annex
2.B.14.
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For national sea transport in Denmark, the fuel consumption estimates obtained
by DCE (see 1.1.3 Activity data – national sea transport) are regarded
as much more accurate than the DEA fuel sales data, since the large fluctuations
in reported fuel sales cannot be explained by the actual development in
the traffic between different national ports. As a consequence, the new bottom-up
estimates replace the previous fuel based figures for national sea
transport.
There are different potential reasons for the differences between estimated
fuel consumption and reported sales for national sea transport in Denmark.
According to the DEA, the latter fuel differences are most likely explained
by inaccurate costumer specifications made by the oil suppliers. This inaccuracy
can be caused by a sector misallocation in the sales statistics between
national sea transport and fisheries for gas oil, and between national sea
transport and industry for heavy fuel oil (Peter Dal, DEA, personal communication,
2007). Further, fuel sold for vessels sailing between Denmark and
Greenland/Faroe Islands are reported as international in the DEA statistics,
and this fuel categorisation is different from the IPCC guideline definitions
(see following paragraph “Bunkers”).
Following this, for fisheries and industry the updated fuel consumption time
series for national sea transport lead, in turn, to changes in the fuel activity
data for fisheries (gas oil), industry (heavy fuel oil) and international sea
transport, so the national energy balance can remain unchanged.
For fisheries, fuel investigations made prior to the initiation of the work
made by Winther (2008a) have actually pointed out a certain area of inaccuracy
in the DEA statistics. No engines installed in fishing vessels use heavy
fuel oil, even though a certain amount of heavy fuel oil is listed in the DEA
numbers for some statistical years (H. Amdissen, Danish Fishermen's Association,
personal communication, 2006). Hence, for fisheries small amounts
of fuel oil are transferred to national sea transport, and in addition small
amounts of gasoline and diesel are transferred to recreational craft.
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For diesel and LPG, the non-road fuel consumption estimated by DCE is
partly covered by the fuel-use amounts in the following DEA sectors: agriculture
and forestry, market gardening, and building and construction. The
remaining quantity of non-road diesel and LPG is taken from the DEA industry
sector.