On Wed, 5 Jul 2006 20:54:50 +0100, David Hansen wrote
(in article ):

On Wed, 05 Jul 2006 09:16:30 +0100 someone who may be The Natural
Philosopher wrote this:-

steam of 500C plus at the start and 30C or less at the end nets you over
60%...

Siemens are claiming a net efficiency of 46% at the moment, rising
to 51% in the future, according to
http://www.energy-focus.com/pdfs/POWER/STEAM.pdf

I am pleased to see that they have now developed turbines that will
actually work for an extended period under these steam conditions.

Another factor is nuclear: IF we are considering CO2 emissions, then
since 25% of electricity is nuclear, the net effect of heating by
electricity on C02 is mitigated by 25%..

Only if nuclear power emits zero carbon dioxide. However, despite
the incorrect claims of the likes of Bernard Ingham, it does emit
carbon dioxide. While it emits relatively low amounts of carbon
dioxide compared to some forms of generation, it emits more than
some other forms of generation.

Possible, but are these forms that allegedly emit less economically viable
and scalable to present and increasing future demand?