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Preliminary Analysis of MHD Retrofit for the Colstrip Power Plant

机译：作者：张莹莹，电力设备ELECTRICaL EQUIpmENT 2006年第11期防住电厂mHD改造浅析

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The US DOE Office of Magnetohydrodynamics has established a development program to demonstrate the commercial feasibility of magnetohydrodynamic power generation through the operation of an Engineering Test Facility (ETF). Two MHD power system designs as candidates for the Engineering Test Facility are presented. The two system designs involve open-cycle MHD power trains retrofitted to the coal fired Colstrip power plant owned by the Montana Power Company. Under retrofit operation, the MHD topping cycle generates electric power from hot (4500 exp 0 F) coal combustion gas flowing through the MHD generator, and produces steam for the Colstrip plant from heat recovered from combustion gas leaving the MHD generator. The Colstrip plant acts as a steam bottoming cycle, receiving a portion of its steam supply from the MHD heat recovery system. A portion of the plant steam supply is also obtained from the original Colstrip boiler. A retrofit facility reduces construction time and cost from what would be required for an entirely new MHD test facility by using not only the available steam cycle equipment, but most of the supplemental facilities as well. One retrofit system employs an oxygen enriched, direct fired MHD power train in which the combustion oxidizer is a mixture of air and oxygen preheated to a moderate temperature (1100 exp 0 F). The preheat is obtained in a recuperative type heat exchanger. The other retrofit system uses an MHD power train with nonenriched air preheated to a high temperature (2500 exp 0 F) as the oxidizer; preheat is obtained in a regenerative type heat exchanger subsystem that is fired separately with oil. A preliminary design and cost estimate for each retrofit system is presented. (ERA citation 06:011126)

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