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The principles of the Kalina cycle are described. In theory, the Kalina cycle can help convert approximately 45% of a direct-fired system's heat input to electricity and up to 52% for a combined-cycle plant (a gas turbine produces exhaust, which enables a steam turbine to produce electricity). This compares with about 35% and 44%, respectively, for the steam cycle. Plans announced by the Fayette Manufacturing Corp. for building a prototype combined-cycle power plant utilizing the Kalina cycle are discussed.