Flywheel energy storage for regional rail
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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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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

Diesel-Hydrodynamic

13%

40%

43%

19%

Source: ‘Improving the efficiency of traction energy use’, RSSB report


Energy storage for trains

Requirements for

regen braking

Ultra-caps

Power/kg

Hydraulics

Batteries

Advanced

flywheels

Energy/kg


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


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


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


Thank YouAny Questions?

Matthew Read

Email: [email protected]

Tel: +44 (0)20 7594 7203


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