Tunnel vision: the challenge of cooling the London Underground (2018)

There’s an article out there about TfL using regenerative breaking to store to use electricity from regen breaking to power an Underground station, prompted by a post on Caltrain.<p>This isn’t that but it is an impressive article on its own.

Is it just me, but if there’s enough drainage send a train with hundreds of ice blocks, drop them off in alcoves along the tube tunnel and they’ll melt absorbing large amounts of heat.<p>Maybe not 500 GW I grant you, and water and electricity need to be kept well apart, but sure some areas could be isolated.<p>I’m guessing drainage is an issue, but there’s always a risk of flooding I would have thought there would be drains and pumps already there.