4 ms·
https://www.torus.co/torus-flywheel https://www.torus.co/torus-flywheel
by herlitzj 3y ago
https://www.torus.co/torus-flywheel https://www.torus.co/torus-flywheel
- ketzo 3y agowell, if nothing else, that thing looks futuristic as hell would love to point out in my yard and say "oh, that? that's our mechanical energy storage device"
- reacharavindh 3y agoThat looks very cool. Mechanical energy storage. Any idea what the return efficiency of such a device is? And guesses about its cost?
- herlitzj 3y agoNo idea. But interestingly enough, it looks like someone built a grid scale version in PA with funds from the 2008 Recovery Act. There's a final tech report here https://www.smartgrid.gov/project/hazle_spindle_20mws_flywheel_frequency_regulation_plant https://www.smartgrid.gov/project/hazle_spindle_20mws_flywhe... in the Related Docs
- hpb42 3y agoCool! Thanks for the link. A 10 kWh flywheel that can charge/discharge at 20 kW (lasts for 20~30 min at this power) costs ~11500 USD + installation and control system. A Tesla Powerwall has 13.5 kWh capacity, delivers power at ~6 kW and costs ~11500 USD. That doesn't seem a large difference to me.