background preloader

Flywheel energy storage

Flywheel energy storage
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.[1] Since FES can be used to absorb or release electrical energy such devices may sometimes be incorrectly and confusingly described as either mechanical or inertia batteries [2][3] Main components[edit] The main components of a typical flywheel. A typical system consists of a rotor suspended by bearings inside a vacuum chamber to reduce friction, connected to a combination electric motor and electric generator. Physical characteristics[edit] General[edit] .

http://en.wikipedia.org/wiki/Flywheel_energy_storage

Flywheel electricity generator Abstract: A flywheel (magnet rotors or stators) assembly to create electricity, by attaching motor to provide kinetic energy to magnet rotors or stators, so magnet rotors or stators can run on principal of flywheel to create electricity by magnet rotors rotating like flywheel on two sides of stator, and stator rotating like flywheel in-between magnet rotors. Claims: 1. 2. 3.

Grid energy storage Simplified electrical grid with energy storage. Simplified grid energy flow with and without idealized energy storage for the course of one day. As of March 2012, pumped-storage hydroelectricity (PSH) is the largest-capacity form of grid energy storage available; the Electric Power Research Institute (EPRI) reports that PSH accounts for more than 99% of bulk storage capacity worldwide, around 127,000 MW.[1] PSH energy efficiency varies in practice between 70% to 75%.[1] An alternate approach to achieve the same effect as grid energy storage is to use a smart grid communication infrastructure to enable Demand response (DR). The core effect of both of these technologies is to shift energy usage and production on the grid from one time to another.

VYCON - Flywheel Technology Flywheels have been used since the Bronze Age as a way to store kinetic energy. Today, with new high speed motor technology, VYCON has developed highly efficient flywheel systems which provide consistent, dependable energy for a variety of important applications. VYCON's flywheel-based energy storage systems hold kinetic energy in a spinning mass, and convert this energy to electric power through the use of a high speed electric motor/generator. Advanced flywheel systems from VYCON originated from its parent company Calnetix, the leader in high speed permanent magnet motors and generators, magnetic bearings, power electronics and system integration. Main components of the VYCON flywheel -- a high-speed permanent magnet motor/generator, fully active magnetic bearings, and the rotor assembly construction -- constitute a unique synthesis of proprietary technologies:

Superconducting magnetic energy storage - Wikipedia, the free en Superconducting Magnetic Energy Storage (SMES) systems store energy in the magnetic field created by the flow of direct current in a superconducting coil which has been cryogenically cooled to a temperature below its superconducting critical temperature. A typical SMES system includes three parts: superconducting coil, power conditioning system and cryogenically cooled refrigerator. Once the superconducting coil is charged, the current will not decay and the magnetic energy can be stored indefinitely. Due to the energy requirements of refrigeration and the high cost of superconducting wire, SMES is currently used for short duration energy storage.

Flywheel technology puts new spin on power Computerworld - When Freescale Semiconductor Inc. installed a new UPS system in its Austin data center, batteries weren’t included — and they weren’t needed. The semiconductor manufacturer uses an uninterruptible power supply (UPS) powered by a flywheel. A single 300-kilovolt-amp unit, about the size of a refrigerator, delivers up to 240 kilowatts of power. Flywheels: How do they work and what do they do? by Chris Woodford . Last updated: January 10, 2012. S top... start... stop... start—it's no way to drive! Every time you slow down or stop a vehicle or machine, you waste the momentum it's built up beforehand, turning its kinetic energy (energy of movement) into heat energy in the brakes .

Fuel cell Demonstration model of a direct-methanol fuel cell. The actual fuel cell stack is the layered cube shape in the center of the image Scheme of a proton-conducting fuel cell Wave Power - Energy from ocean surface waves 17Mar Generating Electricity from Wing Waves Just like wind mills and wind turbines that generate power and electricity from the wind, scientists are now working to generate power from the sea. Stephen Wood, an assistant professor of marine and environmental systems at Florida Institute of Technology's College of Engineering is working on this technology for its advance and proper use. This technology will use Wing waves in a very efficient way to generate electricity and power from the sea. 7 Comments 14Mar

Pumped-storage hydroelectricity - Wikipedia, the free encycloped Pumped storage is the largest-capacity form of grid energy storage available, and, as of March 2012, the Electric Power Research Institute (EPRI) reports that PSH accounts for more than 99% of bulk storage capacity worldwide, representing around 127,000 MW.[1] PSH reported energy efficiency varies in practice between 70% and 80%,[1][2][3][4] with some claiming up to 87%.[5] Overview[edit] Power distribution, over a day, of a pumped-storage hydroelectricity facility. Green represents power consumed in pumping; red is power generated. At times of low electrical demand, excess generation capacity is used to pump water into the higher reservoir. When there is higher demand, water is released back into the lower reservoir through a turbine, generating electricity.

Related: