denis wrote:Impressive !!
What about the motorcycle?
Well it's easy it depends directly on its consumption ... just multiply the liters consumed by 2,3 approximately to obtain kg of CO2. See details here:
https://www.econologie.com/equation-de-c ... s-638.html
So my vfr which is roughly 5,2 L / 100 emits over 800 km about 96 kg.
Small comparison
The raw energy contained to make these 800 km or 41,6 L of gasoline is 416 kwh. With an engine efficiency of 25% (exaggerated) we obtain roughly 100 kwh mechanical per passenger (for 1 single passenger) to move roughly 350 kg.
For the TGV (assuming that it is also 800 km) on the other hand it seems to me little ... indeed a French electric Kwhe emits 90 gr of CO2. So you only need 3000/90 = 33 kwhe electric ... with an engine efficiency of 90% (likely) so we get roughly 30 kwh mechanical per passenger (i.e. if the TGV had an internal combustion engine of 25% efficiency one consumption of 1,5 L / 100)
My motorbike and the TGV are subject to the same forces (G, Inertia ...) and taking into account the useful mass / vehicle mass ratio (the mass moved by passenger in a train is undoubtedly much greater than a motorbike) and the average speed of a TGV bine higher than the motorcycle (if
) ... well I find this value very low ...
Obviously I'm not even talking about losses in the network (losses = loss online, unreadable and loss in the transformers or just for the transformers at least 0,95 power the number of transformer if you have 4 transformers these are already 18,5, 100% loss ...) or the filling rate far from being 2% (although in the TGV XNUMXnd class it is often crowded) ...
So where is the error ?? Too much approximation, lack of precise data or idealization of the calculations in the interest of the train .... ??
Attention I am 100% for train journeys (because they are full or empty they circulate) I only ask myself some questions as an energy engineer ....
Fun game:
Repeat the calculation if you take the train in Germany, knowing that Germany roughly rejects 460 gr / kwhe ...