Improve the performance of generators

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moinsdewatt
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by moinsdewatt » 01/12/13, 12:55

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jonule
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by jonule » 02/12/13, 10:48

...
moinsdewatt wrote:Electric motors already have efficiencies of over 80%.
Inquire.

no I'm talking about amigo alternators: so give us your link to this alternator which has an efficiency of 80%?


...

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by Flytox » 02/12/13, 20:06

Hmmmm Hummmmm

Moderation would like the atmosphere of this post to become more zen .... thank you all.

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by surunitairedream » 03/12/13, 09:56

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by PIEDALU » 03/12/13, 10:03

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jonule
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by jonule » 03/12/13, 10:22

.... Moderated by Flytox
however my approach remains technical, so let's get back to basics:

if an electric motor has an efficiency of 80% as an "engine", is this efficiency the same in "alternator" mode?

a priori any engine can be used as an alternator, but we are always confronted with the "cogging" effect which tends the alternator to "stick" by magnetic field; used for a heat engine it does not cause too much damage but used for a wind turbine it hangs and no longer provides.
after all it is a question of dimensioning according to the potential of the context to be recovered (wind, river), the torque supplied and the needs (electricity for what to do, heat, 220V or 12, 24V etc).

I don't think an alternator can be used as an engine?

it should be noted for neogen and others the improvement brought by the tesla coil and its inversion system precisely to oppose the action / reaction.

for a question of cost (and not efficiency), how to reuse any engine as an alternator:
http://mon.danstagueule.fr.free.fr/NRJr ... 573-22.pdf
http://mon.danstagueule.fr.free.fr/NRJr ... 573-22.pdf
http://mon.danstagueule.fr.free.fr/NRJr ... 573-22.pdf

the rest on
http://mon.danstagueule.fr.free.fr/NRJr ... _elec.html

to evolve of course ...
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moinsdewatt
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Re: Improve the efficiency of alternators




by moinsdewatt » 03/12/13, 19:58

For the efficiency of the alternator, it's very simple. : Cheesy:

Multiple sources.

Wikipedia: 95% efficiency
http://fr.wikipedia.org/wiki/G%C3%A9n%C ... 9lectrique

97% page6 / 6 of this document.
http://fisik.free.fr/ressources/MachineSynchrone.pdf

90% in this document
http://turbinealternateur.fr/index.php? ... rs-bobines

etc., etc. and these conform to my electrical engineering courses.

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by moinsdewatt » 03/12/13, 20:02

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Re: Improve the efficiency of alternators




by moinsdewatt » 03/12/13, 20:08

and then if an atlernator had no more than 95% efficiency, for example in a nuclear power plant, I am not telling you the mess that it would be necessary to cool the alternator.

... Moderated by flytox

ALSTOM has mastered the subject for a long time.

And please do not confuse with the performance of the steam generator. The yield between thermal energy and energy on the tree is much less glorious, but it is thermodynamics that wants that. No electricity.
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