Engineers developing HS2’s Old Oak Common hub are proposing to use heat from the brakes and engines of high-speed trains to provide energy for up to 500 new homes planned for nearby.
The scheme would see five air source heat pumps draw warm air from the railway’s tunnels in north-west London, where the waste heat from trains is usually extracted by traditional ventilation systems and seeps into the ground surrounding the tunnels.
But HS2 plans to feed waste heat into a local district heating system instead. It estimates that the investment in the waste heat recycling system would pay for itself after four years, based on current energy prices.
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