* Posts by Paul

2 publicly visible posts • joined 3 Jul 2008

Europe's Tesla will be first with full performance

Paul
Happy

@Paul Barnfather

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> Or 5,400,000 J/mile

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> Conversion efficiency is around 27%, so at the wheels we need

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> 0.27 x 5,400,000 = 1,458,000 J/mile

>

What you should have done is

5,400,000 / 0.27 = 20,000,000

5,400,000 J/mile at the wheel requires 20,000,000 J/mile in the tank.

>

> 4) Scaling that back up to get a "MPG equivalent", that makes

>

20,000,000/1,332,000 * 30 = 450 MPG

I think your assumptions about 100% efficiency for the electical engine and costs aren't quite right.

Research: Wind power pricier, emits more CO2 than thought

Paul

Pumped Storage

If pumped storage can run the country for a day or two, it can certainly do the load balancing and allow the gas turbines to be started gently, there by removing all this nasty maintaince the Oswald refers to. If you have to (and the pumped storage is running low) you can keep the gas turbine running for an extra hour or two afterwards to replace the pumped storage that was used while the turbine was firing up.