Flywheel Energy Storage

Topics: Energy storage, Flywheel energy storage, Rechargeable battery Pages: 2 (648 words) Published: February 13, 2009
Flywheel energy storage works by accelerating a rotor (flywheel) to a very high speed and maintaining the energy in the system as rotational energy. The energy is converted back by slowing down the flywheel.Flywheel energy storage system is one form of energy storage devices. It is basically a rechargeable battery. It is used to absorb electric energy from a source, store it as kinetic energy of rotation, and then deliver it to a load at the appropriate time, in the form that meets the load needs. A typical system consists of a flywheel, a motor/generator, and controlled electronics for connection to a larger electric power system

.Flywheels are not affected by temperature changes as are chemical rechargeable batteries,nor do they suffer from memory effect. They are also less potentially damaging to the environment, being made of largely inert or benign material.

Flywheel energy storage systems are widely used in space, hybrid vehicles, military field and power quality. Space station, satellites,aircraft are the main application field in space.

1. INTRODUCTION

Flywheel energy storage (FES) works by accelerating a rotor (flywheel) to a very high speed and maintaining the energy in the system as rotational energy. The energy is converted back by slowing down the flywheel.Flywheel energy storage system is one form of energy storage devices. It is basically a rechargeable battery. Most FES systems use electricity to accelerate and decelerate the flywheel, but devices that directly use mechanical energy are being developed.Advanced FES systems have rotors made of high strength carbon-composite filaments that spin at speeds from 20,000 to over 50,000 rpm in a vacuum enclosure and use magnetic bearings. Such flywheels can come up to speed in a matter of minutes -- much some other forms of energy . A compact energy...
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