The engineering aspects of a new high efficiency 16,200-hp (12,080-MW) gas turbine using the Spey gas generator are presented. The history of the Spey and its evolution as an industrial gas generator are given. The design philosophy, aerodynamic features, and mechanical aspects of the new power turbine are discussed. Full-load laboratory test results of the new unit are reviewed. The first field installation, including the conversion of an existing natural gas pipeline unit from an Avon gas generator, is described. The first year of field operating experience is also summarized.

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