Hacker News Reader

Why not merge all the energy storage ideas?

Pump air into a giant pressure chamber...that's also a super-deep hole with a pulley system...and the weight for the pulley is a flywheel sealed in a vacuum chamber, magnetically levitating to avoid any friction losses. Oh, and the mass for the flywheel? A bunch of batteries.

View on HN

This is probably a joke, but it's not so crazy. Many designs are combining one or more of these.

Not entirely joking. I just saw the big hole and immediately thought it'd be a great place to store pressurized air, and then I continued thinking of other energy storage mechanisms you could cram in there.

Reply on news.ycombinator.com