On Wed, 2 Jul 2008, Tom Anderson wrote:

On Wed, 2 Jul 2008, Tom Barry wrote:

Tom Anderson wrote:
On Tue, 1 Jul 2008, Tom Barry wrote:
...

This seems like an extraordinary proposition to me. Could you refer me to
any documents giving more details?

Yup, someone took notes at a TfL talk in March, which are online he

http://www.freewebs.com/going_underg...ogspot.com.doc

Excellent document, thanks!

Relevant section:

Ah, now the thing that i found extraordinary was the idea that heat was
building up in the deep tubes over the course of decades - that the reason
things are hotter today is that heat generated in the 70s or whatever has yet
to escape. I just can't imagine the time constant for diffusion of heat from
the tubes to the surface being that long. I have no basis for this in
geophysical knowledge or engineering experience, but i feel it in my gut.

Hang on, hang on, it now seems like that *really is* what's happening:

http://www.ianvisits.co.uk/blog/2008...n-underground/

Astrordinary!

And also, we're already regenerating almost as much as we can.

And also, in most bat**** but brilliant underground engineering idea i've
heard recently news: building drilling rigs in the Northern line deep
level shelters (currently used as document archives etc) in order to tap
cold, deep aquifers.

Further bat**** cooling ideas, this time of dubious brilliance:

http://www.undergroundcooling.net/

tom

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