Method for Determining the Change in Gas Turbine Firing Temperature

摘要

The maximum firing temperature of a gas turbine (GT) is limited by material constraints. Critical for the operation of the GT is the blade metal temperature, which is impacted by the heat transfer from the combustor outlet gas to the blade surface. In this study, performance characteristics for an H-class-type GT have been established and two correlations for the change in the maximum permissible firing temperature as function of combustor outlet gas composition or flue gas composition and pressure ratio have been derived: (Ⅰ) for detailed GT modeling with cooling flows and (Ⅱ) for simplified GT modeling without specifying cooling flows.