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Non-road fuel consumption and pollutant emissions ... - BAFU - CH

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9 > Supplementary observations 109<br />

9.3.4 Fuel <strong>consumption</strong><br />

With respect to <strong>fuel</strong> <strong>consumption</strong> there are considerable differences between the new<br />

calculations <strong>and</strong> the forecast in Report 49 for 2005 in the construction, industrial,<br />

agricultural, forestry <strong>and</strong> garden-care/hobby categories.<br />

In the new calculation the <strong>fuel</strong> <strong>consumption</strong> of construction machinery is significantly<br />

lower than in Report 49. The reason for this is that the number of construction machines<br />

included in the new inventory is lower. But the difference in <strong>fuel</strong> <strong>consumption</strong> is<br />

not as pronounced as the difference in the inventories: the average engine power of<br />

construction machines included in the new non-<strong>road</strong> inventory (48 kW) is considerably<br />

higher than that in the inventory in Report 49 (estimated at 26 kW in 2005).<br />

In this category, the difference in <strong>fuel</strong> <strong>consumption</strong> between the new <strong>and</strong> the previous<br />

inventory is primarily attributable to snow groomers, which have a very high engine<br />

power as well as a high level of operating hours. However, compared with the differences<br />

in the inventory <strong>and</strong> operating hours, this deviation is fairly low. This is attributable<br />

to the low load factors for forklifts, which have been listed as a separate machine<br />

sub-segment in the new inventory. The average load factor of all industrial machinery<br />

is reduced by more than half compared with the assumptions made in Report 49.<br />

The differences in these two categories are attributable to the inventories <strong>and</strong> operating<br />

hours. With agricultural machinery the difference in <strong>fuel</strong> <strong>consumption</strong> is less pronounced<br />

than in the inventory <strong>and</strong> operating hours (new figures: operating hours<br />

reduced by approximately 50%, but <strong>fuel</strong> <strong>consumption</strong> only 25% lower). In the new<br />

inventory, a <strong>consumption</strong> adjustment has been made at low load factors (CF 1 ), i.e.<br />

tractors which have a low load factor of 0.25 (according to FAT 1998) have an approximately<br />

30% higher specific <strong>consumption</strong> as a result. In addition, the average<br />

engine rated power of tractors in 2005 is approximately 50% higher than was anticipated<br />

for that year in Report 49 (59 versus 40 kW).<br />

In the new calculation, railway vehicles have been allocated a lower load factor that<br />

corresponds to the engine load during shunting operations. The <strong>fuel</strong> <strong>consumption</strong> thus<br />

more or less corresponds to the levels anticipated in Report 49, even though significantly<br />

higher operating hours have been assumed.<br />

The lower level of <strong>consumption</strong> in this category is partly attributable to the lower<br />

specific operating hours of the appliances, but also to the assumption that the average<br />

engine power of the appliances is lower than was assumed in Report 49. In addition,<br />

lower <strong>consumption</strong> factors were assumed here in view of the lower level of hydrocarbon<br />

<strong>emissions</strong>.<br />

Construction machinery<br />

Industrial machinery<br />

Agricultural <strong>and</strong> forestry<br />

machinery<br />

Railway machinery<br />

Garden-care/hobby appliances

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