« | Main | The Power Potential of Various Exercise Machines »


Feed You can follow this conversation by subscribing to the comment feed for this post.


cool! Great Idea! a small kWh to height calculator for electricity storage aka your gravity lift(no loss included): http://www.pv4.eu/kwh-to-joule-to-specific-weight-to-mass-to-height-water-energy-storage/ maybe for the cooking and washing heat I make a calculator for the exact training or power production plan?

serge sonnino

Great project!
Two aspect, that may be you have already been thinking about:
What about exhaust air heat recycling?
Is it possible to have a down lift with gravity energy production?
Very soon my solar car blog will be translated in english too.

Douglas Miller

A lot of energy will be lost in the stairwells as students climb up and down as many as 22 stories. Is there a way to capture that energy? Perhaps some sort of "pressure to power" pad on each tread?

I would be very unlikely to rent one of the top floor rooms, great view or no. Could hydraulic accumulator powered elevators be used? If they were run on a schedule (i.e. up and down every 10 minutes) there would not be a frequent/random draw of energy.

Another option might be elevators that only stop at every 5th floor, for example. Students would be expected to get off and walk up from the lowest floor of their five floor section of the tower. Every body would only have to climb five stories maximum.


Going upstairs won't harvest energy, but if you offer a speed-limiting rope engine for going down one floor (like in old firefighter buildings - but holding on to the rope instead of sliding down a pole), the way down would be faster AND generate energy. The staircase could be used downwards for safer transfer (w.g. when transporting stuff).


Well, today is March 9th, 2019. How's the project going? What have you learned from it?

I have seen a human-powered elevator on a Michigan farm. It took a farm worker up to the top of the grain storage bins. The hoisting rope had a counterweight a little less than the average weight of a worker (and elevator box), so gentle tugging on a rope that ran through the elevator box was enough to pull the whole thing up, and it would descend gradually (only) under the worker's weight (with some hand-friction to control the speed). Note that it could only carry one passenger, and that passenger had to come down (thereby raising the counterweight) before another could go up.

The comments to this entry are closed.