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A place to post ridiculous posts from linkedIn.com

(Full transparency.. a mod for this sub happens to work there.. but that doesn't influence his moderation or laughter at a lot of posts.)

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Free energy mod! (infosec.pub)

submitted 2 months ago by Steve@startrek.website to c/linkedinlunatics@sh.itjust.works

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[–] pelespirit@sh.itjust.works 2 points 2 months ago (35 children)

I don't claim to be an engineering student, why is this a bad idea? Wouldn't he just put a "collector" of energy (like a wind turbine) on the wheels?

[–] Steve@startrek.website 2 points 2 months ago

Maybe you can join his team!

But I can forgive a non engineering student… its impossible.

[–] iloveDigit@sh.itjust.works 2 points 2 months ago* (last edited 2 months ago)

It could be an OK idea that just wasn't explained right. Maybe he just wants regen braking but with one wheel for charging and the other wheel + separate battery for power at any given time. Energy would come from pedalling and hills. None of that was explained though

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[–] agamemnonymous@sh.itjust.works 2 points 2 months ago (4 children)

Do most e-bikes not charge from the pedals? Combine that with regenerative coasting/braking, and this isn't really that dumb. Like yeah, obviously thermodynamics, but an E-bike with pedal charging isn't a closed system.

[–] Psythik@lemmy.world 3 points 2 months ago

I've built two eBikes and can confirm that they do not.

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[–] Rooskie91@discuss.online 2 points 2 months ago

Physics's older brother gonna be looking for this guy.

[–] djsoren19@lemmy.blahaj.zone 2 points 2 months ago (4 children)

so, obvious reasons why this cannot work.

Is there anyway to like, siphon off the energy though? Like say, you pedaling produces 600kJ/hr. You have 400kJ/hr going into the bike to produce motion, but then 200kJ/hr goes into a battery. You'd move slower but generate stored potential energy.

I'm not really sure why you would want this, other than the concept of a self-charging electric bike, but on paper it sounds possible?

[–] socsa@piefed.social 2 points 2 months ago

A normal bike drivetrain is around 95% efficient, which is more efficient than the Regen circuitry you could get in such a form factor. Therefore it makes more sense to use pedal power for direct propulsion since that will directly reduce battery more efficiently than using it for charging.

This is different than a series hybrid because car drivetrains are very inefficient compared to a bicycle.

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