Chart 14: Life-time primary energy savings of 10 % weight reduced new registration in 2000
Life-time primary energy savings of 10 % weight reduced new registration in 2000 [PJ]
Long distance buses
Source: IFEU 2002 from various sources
Heavy duty Subways/
From Chart 14 it can be concluded that the highest weight induced energy savings by a 10 % net weight reduction can be achieved for the subsystem passenger cars. This is mainly due to the high total energy consumption of passenger cars due to their great numbers. The total life-time primary energy savings of 10 % net weight reduced annual new registrations of passenger cars account for over 5 % of the total annual energy consumption of all passenger cars in Germany. All other subsystems have con- siderably lower energy savings. It has to be noted, however, that only heavy trucks (> 32t) have been considered here. The potential energy savings of all trucks will be higher. Regional trains have the highest savings among the rail vehicles. This is due to their high absolute energy consumption, high relative energy savings and high net weight compared to the gross weight. Road vehicles increase their CO2 saving po- tentials in comparison to the primary energy savings in our scenario. This is due to the share of nuclear and hydro power, which create almost no CO2 emissions in comparison with energy derived from fossil fuels (Chart 15). For the values in Chart 15 the energy split and emission factors for Germany 2000 have been used.
Energy savings by light-weighting