Comment by slenk | Hacker News Reader

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Comment by slenk | Hacker News Reader

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My old company had flywheel generators - since those didn't generate pollution they all were located inside

Flywheel generators or UPS? AFAIK, flywheels are only temporary energy stores while diesel gensets are spun up to peak power.

They are also used as frequency/power regulators (or for high power phase conversion, unlikely in a data center)

Flywheel while the diesel gennies spun up

DRUPS - Dynamic rotary UPS. It provides enough energy for your ride-through period until your gensets are up and the power quality is good.

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