Abstract
The application of the new, coal-fired open-cycle liquid-metal MHD (OC-LMMHD) energy conversion system to the retrofit of an existing oilor gas-fired conventional steam powerplant is evaluated. The evaluation criteria are the net plant efficiency and the cost benefit relative to other options, i.e., continuing to burn oil, a conventional retrofit to burn coal (if possible), and an over-the-fence gasifier for boilers that cannot burn coal directly. The retrofit is described, including the significant fabrication and functional features. The substantial gains in net plant output power and efficiency for OC-LMMHD vs the reductions for a conventional coal conversion or a gasifier are discussed. A plant lifetime economic analysis for the OC-LMMHD retrofit relative to other options shows payback periods that are very good for utilities.
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