Hello Arnaud, and excuse me, I try to understand your words with your detailed calculations.
You rebuke me if I cheat on me and sharpens my bases:
Arnaud M wrote:For post top, Interesting to know that 100 diesel electric Wh ask 7Wh.
With a diesel performance 10% in town to 1 km in diesel must 70% of the electricity for electric 1 km. The total electric consumption is only 30% compared to diesel, without combustion problems behind ... TBC.
So a diesel consuming "at the pump" 5 to 7 liters per 100km or 50 to 70 kWh
(It is considered that any liquid fuel: petrol, diesel, LPG contains 10kWh / liter)
... Consume town about 700Wh diesel per km (equivalent to 7 100km liters) and will need electricity 49Wh.
Knowing that electric cars consume 200Wh per kilometer (in the case of our old 106 / AX / Saxo, and one of the most successful new (Leaf, Fluence, Tesla). Rather, it represents 25% of the electrical energy consumed to 1 liter of diesel.
Of course this ratio improved with MIA that consumes between 100 and 150Wh per km (in 33 50% either) but does not reach the 70% you ads.
Anyway, it lacks in this calculation the rest of the embodied energy contained in a liter of fuel, ie the energy required to extract, especially transport, refine, the retransporting ... These figures vary enormously between the place of extraction and quality of the deposit, but the vast distances mean that some experts believe, but I do not find publishable links that would represent 2 3 to both the energy contained in a liter of fuel.
If we could prove it and put the car manufacturers before this fact, it could actually compare the impacts from well to wheel.
That would be very disturbing to say that a car consuming to 5litres pump to 100km has actually consumed 15 liters ...
When an electric car consumes 20kWh for 100km (equivalent energy 2 100km liters), if we add the EDF coefficient 2,58, 51,6 kWh this is the 100km barely more than 5 liters.
Fortunately, this coefficient 2,58 is not a fatality but rather a tremendous asset for renewable energy ...
Thus 3.000 kWh produced annually by my solar panels have an efficiency of 1 (or 100% if you prefer) because this electricity is used locally instead of being transported over long distances through power lines.