Gas Turbine Performance
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Tutorial 1: The power and efficiency characteristics of a gas turbine are the result of a complex interaction of different turbo machines and a combustion system. In this tutorial, we will address the basic characteristics of each of the components in a gas turbine (compressor, gas generator turbine, power turbine) and the impact of typical control limits and control concepts. The goal is to provide explanations for the operational characteristics of typical industrial gas turbines, emphasizing the interaction between the gas turbine components. The concept of component matching is explained. Additionally, methods are introduced that allow the use of data for trending and comparison purposes. The impact of component degradation on individual component performance, as well as overall engine performance is discussed, together with strategies to reduce the impact of degradation. In particular, the following topics will be discussed: The gas turbine as a system, Thermodynamics and aerodynamics, Component matching, Off-design behavior of gas turbines, Low fuel gas pressure, Accessory loads, Single-shaft versus two-shaft engines, Variable inlet and stator vanes, Control temperature, Transient behavior, Thermo dynamical parameters of exhaust gases. The topics presented should enhance the understanding of the principles that are reflected in performance maps for gas turbines, or, in other words, explain the operating principles of a gas turbine in industrial applications. The concepts developed will be used to derive basic principles for successful condition monitoring and performance testing of gas turbines.
Kurz, Rainer; Brun, Klaus (2016). Gas Turbine Performance. Turbomachinery Laboratories, Texas A&M Engineering Experiment Station. Available electronically from