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"Over 47 million litres water are pumped from the Tube each day" [1] Use the heat from air in tube to warm the water that is anyways getting pumped up. (Too la
by jpalomaki 9y ago
"Over 47 million litres water are pumped from the Tube each day" [1]
Use the heat from air in tube to warm the water that is anyways getting pumped up. (Too lazy to do the math to see if this would make any difference)
[1] http://www.telegraph.co.uk/travel/destinations/europe/united-kingdom/england/london/articles/London-Underground-150-fascinating-Tube-facts/ http://www.telegraph.co.uk/travel/destinations/europe/united...