Magnetically confined kinetic-energy storage ring: A new fundamental energy-storage concept

A new, fundamental type of energy storage device which has the potential for low cost diurnal storage of electrical energy is introduced. The magnetically confined kinetic energy storage ring (MCKESR) stores kinetic energy as mass circulated at high velocity around a circular loop. The constraining force necessary to keep the circulating mass (essentially a ring) from flying apart is provided by radial, inwardly directed forces exerted along the parameter of the loop by magnetic fields. The magnets and ring are contained in a tunnel, which may be buried in the ground. Levitational support against gravity is also provided by magnetic fields. Electrical energy insertion or extraction is similar to that for a synchronous motor/generator. Major advantages of the MCKESR concept are that large devices seem feasible and that costs are inversely related to size. The use of superconducting magnets should result in a very high energy recovery efficiency.