Quote:
Originally Posted by HPsauce
I'd not include the 0.34 in the diesel calculation. So that would be nearer 30%.
No doubt there are other factors, but overall not a huge difference between electric or petrol/diesel, though my suspicion is that electric is actually less efficient if coming from fossil fuels.
I don't have a formula, remember all I initially said was:
I think your formulae/calculations largely support my initial guess (highlighted in bold).
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I am happy to learn where I am going wrong. Refinery requires energy to run. It requires a lot of electricity. There are no IC engines for efficient crude oil combustion. Therefore you can't lose the power plant efficiency factor for IC engines.
Also 41% is unrealistically high for real world consumer diesel cars, I was too generous. And we didn't mix in petrol, what percentage of cars in the UK are petrol.
Of course if we said nuclear plant for electric cars then IC engines would lose out even more. There is just no way around that huge electric vehicle drive train efficiency factor of 68%.