United Kingdom:

Glasgow Subway ‘Could be Heated with Leak Water’ (Scotsman.com)

(Courtesy urbanrail.net)

The underground train system in Glasgow, Scotland could soon be heated by the water leaking into its tunnels as work begins on an ambitious two-year project.

Glasgow Caledonian University researchers have begun work alongside subway operators SPT to develop a system to utilize the heat from the water which regularly seeps into the network.

Heat pumps will be used to draw out warm water from the soil around the underground tunnels, with the water heating nearby buildings as well as the stations themselves.

The British Geological Survey estimate that the geothermal waters beneath Glasgow could provide enough energy to heat 40% of the city’s homes.