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A New Spin on Hybrid Trains: Flywheel Energy Storage for Regional Rail

Flywheel speed. Energy Flow. Vehicle speed. Engine operation. ON. OFF. Time. A New Spin on Hybrid Trains: Flywheel Energy Storage for Regional Rail. Matthew G Read 1 , Roderick A Smith 1 , Keith Pullen 2

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A New Spin on Hybrid Trains: Flywheel Energy Storage for Regional Rail

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  1. Flywheel speed Energy Flow Vehicle speed Engine operation ON OFF Time A New Spin on Hybrid Trains: Flywheel Energy Storage for Regional Rail Matthew G Read1, Roderick A Smith1, Keith Pullen2 1Future Railway Research Centre, Department of Mechanical Engineering, Imperial College London, 2School of Engineering and Mathematics, City University London 40% diesel trains Problem: Energy is wasted during braking! UK Rail energy use Solution: • Hybrid trains with onboard energy storage device • Fuel consumption and emissions reduced through recovery of braking energy 60% electric trains Flywheel Energy Storage High speed composite flywheels have high specific energy and power Vacuum containment designed to minimise losses and maximise safety Mechanical transmissions have been identified as a potentially efficient, robust and low-cost way of transferring power between the vehicle and flywheel. Novel transmission systems utilising epicyclic gearing are being developed through computational modelling and small scale experimental testing. System Operation Results • Simulation includes; • Detailed component based vehicle model • Realistic route and timetable data Computational model of the proposed flywheel hybrid systems predicts fuel savings of up to 30% for regional rail vehicles

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