On Tue, 16 Jun 2009 23:24:42 +0100, "hungerdunger"
wrote:

"Paul Herber" wrote in message
well.net...

100W+ per person, a couple of MW per train. It all ends up as heat.

Yes, but from my (now possibly incorrect) memory of living in London many
years ago, I seem to remember the Tube was OK in cool weather, but very hot
in hot weather. My point was: shouldn't the temperature be relatively
stable all year round?

If there were no trains and no people then maybe.


--
Regards, Paul Herber, Sandrila Ltd. http://www.sandrila.co.uk/