this post was submitted on 27 Jan 2025
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Electric Vehicles

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Electric Vehicles are a key part of our tomorrow and how we get there. If we can get all the fossil fuel vehicles off our roads, out of our seas and out of our skies, we'll have a much better environment. This community is where we discuss the various different vehicles and news stories regarding electric transportation.

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Caltrain announced that regenerative braking on the new trains is generating and sending back to the electric grid approximately 23% of the energy consumed by the system (www.caltrain.com)
submitted 1 week ago by [email protected] to c/[email protected]
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[–] [email protected] 8 points 1 week ago (3 children)

I'm surprised it's as little as that. My understanding of trains is that the rolling resistance is very low and that all the energy is really for accelerating from standstill. That would be recovered during braking (mostly).

[–] [email protected] 8 points 1 week ago* (last edited 1 week ago) (2 children)

Cabin climate and lighting, especially in warmer contries must be a good 10-20% of energy usage. But yeah a lot of energy is wasted into heat, the London underground is a perfect case study on it

[–] [email protected] 1 points 1 week ago

I am now genuinely curious about the challenges of insulating things underground. Do you know a good article or a study that I can read?