Simulation Models for Analysis and Optimization of Gas Turbine Cycles

This Thesis deals with gas turbine cycle simulation models. In the firs t part it has been analysed the gas cycle theory and the models present in literature starting from the simplest ones to the most advanced ones. In the second part different models have been developed using Aspen HYSY S, a widely used process modelling tool for conceptual design, optimisat ion, business planning, asset management, and performance monitoring. Fu rthermore, parametric analysis has been undertaken for each model to fin d out which variables have the most significant effect on overall effici ency. With these variables a model optimization has been conducted using the Hyprotech SQP optimiser, a rigorous sequential quadratic programmin g (SQP) optimisation solver