On Sep 26, 6:27*pm, The Natural Philosopher
wrote:
harry wrote:
On Sep 26, 2:11 pm, tony sayer wrote:
In article
.com, harry scribeth thus

On Sep 24, 8:47 pm, tony sayer wrote:
In article
s.com, harry scribeth thus
On Sep 24, 10:49 am, "Dave Plowman (News)"
wrote:
In article
,
* *harry wrote:
Volkswagen have been experimenting with *thermpiles in the exhaust to
make electricity and thus eliminating the alternator.
Crikey. An alternator is actually a very efficient device. Sounds like
they're clutching at straws.
An automotive alternator is very inefficient.
Really, why is that and just how inefficient?.
It's inefficient because it's made to a price and petrol was cheap.
Thats err, a very scientific argument Harry;!...

It's an economic argument not scientific..

They could be made far more efficient with say neodymium magnets
instead of electromagnets.

Not really.

* The air gaps in the magnetic circuit could

be reduced.

You dont know much about electric motor or alternator design do you?



All costs money. *More than people are prepared to pay when petrol is
cheap.

I'm way ahead of you TurNiP.