Who has the better ko balance – vehicles with electric motors or those with burners? This question is discussed at Stammtisch, but also among scientists. How massive is the time-consuming battery production down to the very life of the car? And how much does fossil fuel affect total CO2 emissions?
These questions are answered strictly scientifically. This is done on the basis of "Life Cycle Assessments", a complex and elaborate, internationally standardized procedure with the help of which the LCA of vehicles is determined. Among other things, the carbon dioxide emissions are examined during all stages of car life from production to recycling.
VW has carried out such a certified LCA for its bestseller Golf. Rather, for two models: the e-Golf and a TDI. Clear result, according to the Wolfsburg: "The carbon footprint of the battery-powered E variants is already better than those of the corresponding vehicles with internal combustion engine." And: In the case of the Stromers, unlike the diesel, there is still a high potential for CO2 savings during operation – for example, through electricity produced using renewable sources.
The bottom line is that, according to the LCA, the TDI spans its entire life cycle with emissions averaging 140 grams of CO2 per kilometer, while the e-Golf comes to 119 grams. The distribution between production and operation is interesting. CO2 emissions from the construction of an e-Golf are 57 grams of CO2 per kilometer – because of the batteries. For the diesel, a share of 29 grams was determined.
In operation, the relationship then reverses. Provision and combustion of the light heating system in the TDI, calculated at 200,000 kilometers, account for 111 grams of CO2 per kilometer, while a vehicle with electric drive emits 62 grams per kilometer per kilometer.
The VW Group, which currently relies entirely on the electricity card, sees a number of opportunities for the future to significantly increase the lead of the Stromer in terms of lifetime emissions. Thus, the CO2 emissions for the batteries of the first I.Q. model, which is expected by the end of 2019, should be reduced by more than 25 percent per kilowatt-hour of battery capacity compared to the current e-Golf battery. If the power for driving is obtained exclusively from renewable sources, the CO2 emissions would drop to two grams during the utilization phase of 62 grams of CO2 per kilometer in the current EU electricity mix, according to the Lower Saxony.
The article "Diesel against Stromer: The CO2 balance" was added on April 24, 2013 in the category Environment by Rudolf Huber with the keywords Car, Electric Car, Diesel, Emissions, Comparison, Environment, released.