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Mechanical Energy Storage

Mechanical Energy Storage. Ali Shazan Gulrez A3EE56. Three Types of Storage. Pumped hydroelectric storage (PHS) Compressed air energy storage (CAES) Flywheels. Pumped Hydroelectric Storage (PHS). Used for load balancing of energy Water is pumped up in elevation during time of low demand

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Mechanical Energy Storage

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  1. Mechanical Energy Storage Ali Shazan Gulrez A3EE56

  2. Three Types of Storage • Pumped hydroelectric storage (PHS) • Compressed air energy storage (CAES) • Flywheels

  3. Pumped Hydroelectric Storage (PHS) • Used for load balancing of energy • Water is pumped up in elevation during time of low demand • Water flows back down during times of high demand • Turbines recapture the energy. • Currently the most cost effective • way to store large amounts of • electricity • Low energy density calls for large • bodies of water

  4. Compressed air energy storage (CAES) • Large tank is buried underground • During times of low demand electricity compresses air • During times of peak demand compressed air is heated and released http://www.sandia.gov/media/NewsRel/NR2001/norton.htm

  5. Flywheels • Captures energy in a rotating Mass • Flywheel is charged using electric motor • Electric generator extracts energy

  6. Energy held in Spinning Rotor (Steel or Carbon composite) • Steel rotors can spin at several thousand rpm • Carbon composite spin up to 60k rpm Kinetic Energy 1/2mv2

  7. Flywheels Vs. Batteries FLYWHEELS BATTERIES • Not effected by temperature changes • No Memory Effect • Made more environmentally friendly • Easy energy content identification • Shattering due to overload • Safety devices add lots of mass • Gyroscope (duel FES systems)

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