Provide Design Flexibility Research Articles

Magnetohydrodynamic Generator Scaling Analysis for Baseload Commercial Powerplants

Magnetohydrodynamic generator channel scaling analyses have been performed to establish the effect of generator size and oxygen enrichment on channel performance. These studies have shown that MHD generator channels can be designed to operate efficiently over the range of 250 to 2135. The optimum design conditions for each of the thermal inputs were established by investigating various combinations of electrical load parameters, pressure ratios, magnetic field profiles, and channel lengths. From these parameter variations the set of conditions producing the optimum performance was selected for the design point. These results provide design flexibility for the baseload combined cycle MHD/steam powerplant.

Can perforated-sheet bubble devices be scaled down from 2 to 0.2 micron features

This paper assesses the scaling-down possibility, and determines feasible geometries for miniaturizing the perforated-sheet devices, which offer high speed and simple packaging, but must be improved in density and functional versatilities (replication, swapping, editing, etc.). The use of separate control conductors can provide design flexibility, and over-sized gates and permalloy keepers can relax scaling-down constraints (i.e. electromigration and on-chip power dissipation). Miniaturized devices are implemented with thin propagation sheets, and thick but over-sized control conductors plus keepers. Moreover, 0.2μ bubble devices with functional versatilities appear achievable if suitable bubble medium, lithography, and thin films could be provided.