A magnetic energy storage system made in an ellipsoidal enclosure and associated variable height superconductive coils is analysed and a comparison with other systems possessing the same superconductive material volume
V_{s}
and operating current I is performed. Two sets of geometrical dimensions are proposed, one associated with
V_{s}
=0.01 m
^{3}
and I=80 A and the other corresponding to
V_{s}
= 1.437 m
^{3}
and I=540 A. An efficiency evaluation dependency
W_{m}/V_{S}
−V
_{Threshold}/V_{Overall}
, taking into account the safety magnetic field threshold
B_{Threshold}
=0.5 mT distance, is introduced. The results show a remarkable improvement achieved with the ellipsoidal structure in terms of stored energy as well as better shielding in respect to the equivalent system solenoid.
