June 19th, 2017

dancefloorlandmine: (London)
Monday, June 19th, 2017 05:07 pm
An interesting article about temperatures in the tube tunnels, and approaches to reduce them.

www.ianvisits.co.uk/blog/2017/06/10/cooling-the-tube-engineering-heat-out-of-the-underground/.

One interesting note is that the tube tunnels used to be a lot cooler, but the clay around them, a highly effective insulator, has, over the years, pretty much reached its thermal capacity.
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