"The Other Mike" wrote in message
...
On Thu, 18 Oct 2012 10:15:57 +0100, The Natural Philosopher
wrote:

The Other Mike wrote:
On Wed, 17 Oct 2012 02:29:42 +0100, "Doctor Drivel"
wrote:

But 80% of the energy in that tank is wasted. So go back and do some
sums.

You do the same on the energy loss from the raw fuel coming into the
power
station to that eventually applied to the wheels in an electric car.

Go on just make a stab at it.


50%.
for a CCGT.
About 70% for conventional coal.

I knew that, just don't give him any clues!

You never knew that at all.