Flywheel energy storage | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-05-06

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Flywheel_energy_storage


00:00:57 1 Main components
00:01:44 1.1 Possible future use of superconducting bearings
00:03:39 2 Physical characteristics
00:03:49 2.1 General
00:04:59 2.2 Form of energy storage
00:05:27 2.3 Specific energy
00:06:48 2.3.1 Geometry (shape factor)
00:07:58 2.3.2 Material properties
00:08:33 2.3.3 Rotor materials
00:09:10 2.4 Tensile strength and failure modes
00:11:18 2.5 Energy storage efficiency
00:12:18 2.6 Effects of angular momentum in vehicles
00:13:54 2.6.1 Full-motion gimbals
00:14:48 2.6.2 Limited-motion gimbals
00:15:30 2.6.3 Counterbalancing of angular momentum
00:16:43 3 Applications
00:16:53 3.1 Transportation
00:17:01 3.1.1 Automotive
00:19:59 3.1.2 Rail vehicles
00:21:04 3.1.3 Rail electrification
00:22:04 3.2 Uninterruptible power supplies
00:23:13 3.3 Test laboratories
00:24:08 3.4 Physics laboratories
00:25:18 3.5 Aircraft launching systems
00:26:14 3.6 NASA G2 flywheel for spacecraft energy storage
00:27:03 3.7 Amusement rides
00:27:48 3.8 Pulse power
00:29:01 3.9 Motor sports
00:30:16 3.10 Grid energy storage
00:31:34 3.11 Wind turbines
00:32:10 3.12 Toys
00:32:27 3.13 Toggle action presses
00:32:56 4 Comparison to electric batteries



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SUMMARY
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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.  When energy is extracted from the system, the flywheel's rotational speed is reduced as a consequence of the principle of conservation of energy; adding energy to the system correspondingly results in an increase in the speed of the flywheel.
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-fiber composites, suspended by magnetic bearings, and spinning at speeds from 20,000 to over 50,000 rpm  in a vacuum enclosure. Such flywheels can come up to speed in a matter of minutes – reaching their energy capacity much more quickly than some other forms of storage.