Flywheel Kinetic Energy
Flywheel Kinetic Energy
A flywheel stores energy in rotation, smoothing out speed fluctuations in engines, presses and energy-storage systems.
The rotational kinetic energy is KE = ½·I·ω². where I is the mass moment of inertia and ω the angular velocity.
Inputs
I := 12 kg·m^2=12 kg·m^2
omega := 200 rad/s=200 Hz
Apply the rotational kinetic-energy formula.
KE := 0.5·I·omega^2=240000 Nm
Results
Stored energy rises with the square of speed, so a flywheel gives up most of its energy over a small speed drop. That released energy is what carries a press through its stroke.
Assumptions & limitations
- Rigid body rotating about a fixed axis.
- Moment of inertia about the spin axis.
- No windage or bearing losses included.