General consideration for matching combustion and steam turbines are discussed as a background for the typical Repowering study. Different arrangements of the combustion turbines and heat recovery boilers are presented, discussed, evaluated, and a comparison of the systems are made. To complete the investigation, a series of economic factors are considered for comparison between Repowering and an alternate form of generation. In conclusion, by incorporation of combustion turbines in Repowering of an old steam plant, the extended use of combustion turbines can be justified.

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