[Retric]

People are not using it all the time and starting the electric motor to move the revolving door uses more power than it takes to move the door.

Edit: They could have their units mixed up or just measuring the peak output which is not the same as average output.

. Each time you pass through the door you generate enough power to make a cup of coffee.

Ben said on December 4th, 2008 at 4:46 pm

I call bullshit on this - there is no way one person generates the energy to heat a cup of coffee.

Energy needed = mass * temp raise * specific heat capacity = ~0.25kg * ~70C * 4.187 kJ/kgK = ~73kj

If it takes you a generous 10s to walk though the door you would need to be producing 73kj/10secs = 7.3kWatts!!!

According to http://www.ncbi.nlm.nih.gov/pubmed/10090637 the maximum a normal person can produce is ~500W so they are way off.