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IFEU Heidelberg

5

rail vehicles do not generally have higher specific energy savings, their great potential for energy savings by weight reduction mainly results from the high life-time per- formance. Freight trains have higher life-time energy savings because of their possibil- ity for the transportation of a higher payload.

Chart 3: Life time primary energy savings of the use phase for selected vehicle examples Life-time primary energy savings [GJ/100kg]

250

Road vehicles

Rail vehicles

200

150

100

50

Car

Car

(gasoline)

(diesel)

0

27

25

62

20

25

130

City bus

Long distance bus

Articulated truck

Subway

Regional

Long

train

distance

150

70

passenger train

100

High speed passenger train

120

140

Long

Long

distance distance

freight train freight train

(electric)

(diesel)

Source: IFEU 2002 from various sources (Figures rounded) Remark: Error ranges signify the sensitivity to uncertainties in basic data

IFEU 2003

The CO2 savings depend on the final energy savings and the emissions from the en- ergy supply. While refineries are similar in most countries, power plants vary by the primary energy source. Generally the energy split used to generate the power deter- mines the CO2 emissions. In countries with a high share of regenerative or nuclear power, CO2 emission savings will be significantly lower than in countries which gener- ate their power by the use of fossil fuels. For this analysis we use the energy split of the EU 15 with 34.3 % nuclear energy ([EC 2002]). Adjustment in the CO2 emission factors can be made for the respective energy split for country based case studies.

Energy savings by light-weighting

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