NYU to install energy-harvesting revolving door

The Revolution Revolving door

The Revolution Revolving door

In August 2008, I wrote about a revolutionary concept – The Revolution Door – a revolving door that generates energy that can be used to help power a building.

New York architects Carmen Trudell and Jenny Broutin created a glass enclosure of lightweight panels joined at a central core, attached at the top to a circular array of wire coils, with a rotating magnet array and a gear/flywheel Revolution Door 1assembly. Push the doors and the the gear amplifies the motion of the wire coil in the magnetic array, producing electricity.

Until now, this has been a fascinating concept. New York University recently gave the architects a grant to install a working prototype on its campus. It will be interesting to see how much electricity – and PR – this experiment generates over the coming months.


One Response

  1. The answer to how much electricity this will produce can be answer with a bit of simple maths. The long answer is that a typical person can generate about 150W for an hour going flat out. So, if the door had two people at a time going through it pushing as hard as they could they’f generate 300W equivalent for less than a full revolution, so maybe 250W. However, the doors would feel incredibly heavy. So maybe to be practical it woulf have to be about 25% of this max. So now we are down to about 60W continuous. Now we can look at how pften it would be used. This is easy-measure how many people go in and out and how long. Let’s assume 1000 people who take 10 seconds each or approx 150mins per day or approx 10% of the day, so we are talking equivalent to 6W total svetage throughout the day.

    The short answer is very little.

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