Subject:
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Flywheels in LU (was Re: what is the use of a caboose?
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Newsgroups:
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lugnet.trains
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Date:
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Thu, 2 Aug 2001 17:22:33 GMT
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Viewed:
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3184 times
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In lugnet.trains, Tim David writes:
> On similar lines London Underground has a proposal for (and is testing) a
> scheme using flywheels mounted trackside. The principle is that current
> generated by braking trains (back EMF?) drive the flywheels and accelerating
> trains use the power. This reduces LU's total power consumption, spreads the
> peak loadings on the sub-stations, helps reduce wear on brakes and reduces
> heat build in the tunnels (which saves money in heat extraction) up from
> braking.
Why flywheels? Why not just put the power back into the mains? (regenerative
braking) US electric locos do this, I believe...
In this case the flywheels seem to add a layer of complexity (and a source
of loss) that isn't needed unless I am missing something. It would be a neat
model though!
++Lar
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Message has 2 Replies:
Message is in Reply To:
 | | Re: what is the use of a caboose?
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| (...) On similar lines London Underground has a proposal for (and is testing) a scheme using flywheels mounted trackside. The principle is that current generated by braking trains (back EMF?) drive the flywheels and accelerating trains use the (...) (25 years ago, 2-Aug-01, to lugnet.trains)
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