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Two photos of the same train driver, taken 26 years apart
(thelemmy.club)
The two trains pictured:
More info about (and photos of) the driver, Han Junjia:
Ummmm, no? Battery energy density is much worse than the energy density of gas. Electric is better for the environment but what you said is factually incorrect.
Gas has a Energy density (MJ/L) of 34.2 while lithium ion maxes out at ~4.2.
https://en.wikipedia.org/wiki/Energy_density
He said it wrong, but isn't it implied that he meant the right thing? What's the correct term or principle? The one where we get 30-40% of the energy from fossil fuel in ICEs whereas an electric motor gets some 96% from the battery?
Yes, disclaimer here, disclaimer there, electricity has to be produced in order to be put into a battery. But didn't he mean the right thing?
That's "energy efficiency," not "energy density."
ICE is closer to 20% gas to wheels. 30+ (reaching 50 on large diesel) is at the best efficient point, mainly when used for diesel-electric or pumps.
EV has 85% charging and 85% battery to wheels, overall 70+.
Sorry, to be more exact I should have said efficiency.
I was taking into account energy lost due to conversion at the engine where an ICE is between 20 and 25% efficient, or wheel to wheel efficiency if you will, I thought that would have been self-explanatory.
Even accounting for that pretty sure it’s still wrong, that’s why ICE vehicles usually have better range despite not stuffing gas tanks into every available space.
You know what that's fair, I was speaking in a informal tense for which I should have avoided using technical terms to dissuade ambiguity
Imo it was clear what you mean if you apply any benefit of the doubt. But we're on reddit, so they didn't. (I know it's not reddit, das de joke.)
It's correct though.
ICE efficiency in a car ~ 20% for a car, gas to wheels.
Worst case scenario :
Electric cycle efficiency : ~33%
You need to add ~15% overweight for EV, making a conservative 28% total cycle efficiency.
It is definitely the energy density which makes the difference.