Engineers for HS2 Ltd are looking at tapping heat from the brakes and engines of high speed trains for a district heating scheme. Under the plans, hot water and central heating for 500 new homes near the planned HS2 hub at Old Oak Common in northwest London would come from five air source heat pumps drawing warm air from the railway’s tunnels. Waste heat from trains is usually extracted from tunnels by traditional ventilation systems and seeps into the ground surrounding the tunnels. But HS2 ...
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