RAIL NETWORK IN THE WORLD: A HUGE LEGO TOWER x J (Railway Handbook 2012, International Energy Agency) ( OToole,2006) MASS TRANPORT PRIVATE TRANSPORT IMPULSE MASS TRANSPORTATION (RAILWAY) Preventing efficiency loss in railway systems: Energy recycling as an additive solution Lior Abulaf Tamara Covacevich Nadav Rubinstein BREAKING SHAPE FRICTION ROUTE (Jaffery, 2012) BREAKING SHAPE FRICTION ROUTE BREAKING SHAPE FRICTION ROUTE BREAKING SHAPE FRICTION ROUTE (Railway technical, 2012) Why regenerative breaking is not enough? Reversion of the electric motor to slow down the train (UIC, 2003) HEAT AUXILIARIES ACCELERATION a significant amount of the braking energy is dissipated into resistors (Gil,2014) Energy recycling : Our proposal OUT OF THE SYSTEM INTO THE SYSTEM External Aerodynamics of a train (Mira, 2013) 2 MIN BEFORE 1 MIN AFTER Calculations (considering [Tom Kefalas,2014]) kW 350 USD PER HOUR N of turbines and savings depending on the system Where do we use propose to use the recycled energy? Tractive effort and drag as a function of speed (Railway technical, 2011) Projection s Timetable optimization Energy storage (on board or stationary) Reversible substations (AC/DC) On surface replica Cost and long term understanding DEVELOPMENT OBSTACLE OPPORTUNITY