The train that powers itself | Alternative Energy | Forums

would love to see this expanded if the testing is successful, seems to be so far

In the first experiment of its kind, the London Underground has installed an inverter system that converts braking energy into power. For each day of the five-week test, the system captured a full megawatt hour — enough to power more than 100 homes for a year.

Spread across the entire Tube system, that technology would result in savings of £6m, about $9m.

Additionally, regenerative braking doesn’t produce the heat that conventional friction braking does, so the tunnels themselves stay cooler, requiring less energy expenditure on climate control (and keeping Tube riders happier in the process).

more http://www.bbc.com/a.....ts-station