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By A.M. Wolsky
This publication discusses the impression of contemporary superconducting fabrics learn, indicating examine pursuits which look sensible and, if reached, could let various advertisement purposes of the hot fabrics.
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75 x lo4 A/cm2, the reduction in materials materials costs. costs makes the higher-temperature superconducting system more cost-effective than the lower-temperature system. If the current densities of the two superconductors are the higher-temperature system will have a cost advantage of about equivalent, $25O,OOO/yr. Section 4 also points out that the advantage of superconductors with higher transition temperatures would also be enhanced by expected improvements in reliability and availability when operating at liquid nitrogen temperatures relative to liquid helium temperatures.
26 dimensions P F angle (rad) Shield radius (m) Field outer radius (m) Armature inner radius (m) Armature outer radius (m) Self length (m) Field length (m) Heuristic Armature if: al R a0 1, 1f rules Torque factor Vapor cooling factor Carnot efficiency efficien y Refrig. J 2 0 L? P 4 a _. 467 rating Internal reactance Voltage ragi Rating (10 W) Fundamental field Thermal E kf ka ky Cold xa “1. Power (T) b=f calculations Maximum torque (1 6 Nom) TT thickne s (10 -8 m) TT area (m 9 ) Low-temp. 5 (Cont’d) b D Variable/Parameter Shield mass (kg) Torque tube mass Rotor shell mass Losses (103 Symbol (kg) (kg) mass masst massr Cold 62,321 3,070 3,831 Ml 69,114 4,217 30,696 M2 69,114 4,217 30,696 M3 65,578 5,032 10,192 M4 65,518 5,032 10,192 MS 62,327 3,070 3,831 B r: E v, i ii s R z-.
2. Full characterization - 3. of the behavior of the material, including: Magnetic flux density vs. current density frontier, as a function of temperature; Dissipation resulting from time-varying magnetic fields; and Determination of sensitivities of other material properties on stress. Temperature optimization (determination of the best design temperature). Cooling will be easier at higher temperatures, but lower temperatures will provide batter material performance. 20 Performance Rating (MW) Sync.