Abstract

This report represents heating/cooling conditions analysis of high-temperature details of the steam part equipment of combined-cycle power plants. The analysis is based on the justification of their cyclic strength by using 3D finite element models. A procedure is proposed which can be used to develop combined-cycle power plants startup assignment schedules for different initial thermal states and maintenance programs. The resulting solutions can be used to develop combined-cycle power plants diagnostic tasks. Keywords-component; combined-cycle power plant; high- pressure steam superheater; outlet header; initial difference of steam and metal temperatures; heating rate; startup; cyclic strength; startup assignment schedule; maintenance programs; diagnostic tasks

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