Gas Turbine Performance Analysis and Hot-Section Life Prediction Using the GTHM System

n the past decade, the Gas Turbine Health Management (GTHM) system has been developed, and put into service, for various engine types, such as LM2500, RB211 - 24G and 11NMC, for various operators around the world. The system collects real time data from the on-site Programmable Logic Controllers ( P LCs ) or Human Machine Interfaces ( HMIs ), stores them in an OSISoft PI historian, and periodically executes performance calculations and factored hours calculations for each unit. The performance calculations are run from within the Gas Turbine Analysis Program (GTAP), one of the core module s of the health management system. The analysis program employs aerodynamic and thermodynamic principles to model each unit, It uses measured data as input and calculate a set of performance indicators, including compressor and turbine degradations, engine load, efficiencies, fuel usage etc. It also calculates inter - stage temperatures and pressures in the hot section. The health management system also includes a component life prediction module that uses the hot section component metal temperatures to calculate factored operating hours actually consumed by the engine, thereby predicting realistic remaining life of the hot section components. The system also includes turbine exhaust temperature spread radial plot, trending, and reporting modules