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Flywheel Energy Storage for Regional Rail

Flywheel Energy Storage for Regional Rail. Matthew Read, Professor Roderick Smith Future Railway Research Centre Imperial College London. UK Diesel Trains. Diesel trains use 40% of total traction energy Where is this energy used in the vehicle?. Intercity Diesel-Electric. Regional

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Flywheel Energy Storage for Regional Rail

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  1. Flywheel Energy Storage for Regional Rail Matthew Read, Professor Roderick Smith Future Railway Research Centre Imperial College London

  2. UK Diesel Trains • Diesel trains use 40% of total traction energy • Where is this energy used in the vehicle? Intercity Diesel-Electric Regional Diesel-Hydrodynamic 13% 40% 43% 19% Source: ‘Improving the efficiency of traction energy use’, RSSB report

  3. Energy storage for trains Requirements for regen braking Ultra-caps Power/kg Hydraulics Batteries Advanced flywheels Energy/kg

  4. My research • Creation of computational model • Model allows: • Characterisation of existing vehicles • Investigation of route, driver and power-train variables • Study of flywheel systems Inputs Outputs Vehicle data Speed profile Route data Diesel-hydrodynamic vehicle model Power-train efficiency Control parameters Fuel consumption

  5. Mechanical flywheel transmissions • Planetary gear set forms core of transmission • Innovative control methods proposed: • Simple hydraulic system • Mechanical friction brake/clutch system Sun gear Planet carrier Advanced flywheel Final drive Control via ring gear

  6. Results • Flywheel transmission efficiency ~ 90% • 30% fuel saving possible for branch line operation Conventional vehicle Flywheel hybrid • Flywheel systems offer a potentially light-weight, robust and efficient energy storage solution

  7. Thank YouAny Questions? Matthew Read Email: m.read06@imperial.ac.uk Tel: +44 (0)20 7594 7203

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