Magnetohydrodynamic Generator Design for a Combined-Cycle Demonstration Powerplant

The design of a diagonally loaded, supersonic magnetohydrodynamic (MHD) generator channel for an integrated MHD/steam demonstration powerplant is presented. The generator channel has a thermal input of 250 MW, is 11 m long, and produces 28.5-MW gross power output at its nominal design operating condition. The gasdynamic, gas-side, and mechanical designs of the proposed generator are derived from the design of a prototypical 50-MWt (thermal megawatts) MHD generator that recently completed proofof-concept testing at a U.S. government test facility. The design and operating parameters of the demonstration generator will be typical of those anticipated in future commercial MHD generator channels.

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