Kinetic Energy Storage. Theory and Practice of Advanced by G. Genta

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By G. Genta

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R. 6. 6 Recording of three cycles of the experimental load-levelling system operating at Pirelli factory and built under an Italian National Research Council (CNR) contract. Power required by the driven machine (a sheeter), power needed from the mains levelled by the flywheel system, and flywheel speed as functions of time When a highly variable electrical load has to be installed in a place away from the generating plant and power lines are not adequately dimensioned, a load-levelling unit can be very profitable.

What are here considered lowenergy density rotors would constitute already a great progress. Emergency devices using flywheels can be of different types, ranging from simple flywheels connected to the shafts of cooling or lubrication pumps of 44 Application of flywheel energy storage systems machines, aimed at ensuring a safe slowing down in case of power failure, to flywheels used to supply power to vital equipment for the entire period of power interruption. An intermediate solution is the use of a flywheel to start a diesel generator, while supplying the required power during the start-up process.

23% of the total amount of energy used in Italy in 1975 was consumed by private motor cars in cities. This amounts to almost 40% of the whole quantity of energy used by the transport system and to almost 10% of the whole oil consumption. These figures differ from country to country, and it is to be expected that they are higher in the USA where the transport system uses up to 25% of the whole energy consumption against 18% in Italy, but the figures are typical for developed western countries. Computer simulations have proved that some 65% of the energy consumed by road vehicles in city traffic is used to accelerate the vehicle.

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