Carbon dioxide values and how they are calculatedIt often happens, that different CO2 emissions are published for the same process. Overview about different methods to calculate the GHG emissions of a process.
At the emission values of Diesel, petrol and natural gas had been the tank to wheel method chosen. A liquid in the tank is burned in the ICE, the emitted carbon dioxide is measured. All the processes before remain untouches. This means oil production, transport, refinery and distribution to the service stations.. At oil sand and oil shales can this pre processes more than double the emissions.
By this definitions, electric cars and hydrogen cars would be without emissions. Here are the values from the emissions per kWh electric power. Here is only the running power plant observed. The pre processes of the energy source remain unnoticed.
By the above definition, electric cars and hydrogen cars would be again without emissions. So at sun and wind is evaluated how much GHG emission occured at the production of the facilities. This emissions are distibuted over 20 years guaranteed lifetime If there is for a photovoltaic purchases 2000 a reason for a jubilee celebration in 2100, the CHG emission would be only 1/5 from what is published here. |
