TUTORIAL: GAS TURBINE PERFORMANCE
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Date
2015
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Turbomachinery Laboratory, Texas A&M Engineering Experiment Station
Abstract
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 operation principles of
a gas turbine in industrial applications.
Description
Tutorial