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ICTD International Centre for Training and Development

Gas Turbines: Operation and Performance

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Description

The objectives of this course are to relate the fundamentals of gas turbine technology to operational aspects of Power Plants, and to provide information on state-of-the art developments and future technological advances in these fields. It will provide Fresh Engineers and Operators with a broad review and synthesis of the key factors driving the Operation of Gas Turbines.

At the end of the course, the participants will have acquired an overall understanding of the topic that will help them to recognize and understand the significance of specific Operations issues.

For those individuals who do not have a background in mechanical/Electrical Engineering, a five days session is required to introduce the individuals to some fundamental concepts required to attend the main course.

Course Objectives

Upon successful completion of this course, the delegates will be able to:

  • Explain the basic thermodynamic principles behind gas turbines
  • Understand the basic operation of a gas turbine
  • Clearly describe the operation and function of gas turbine components
  • Perform simple troubleshooting and maintenance
  • Do a simple review of the successful operation of a gas turbine and know what characteristics are required for materials and fuels
  • Perform simple condition monitoring interpretation and maintenance

Course Outline

Day 1

GAS OPERATION

OVERVIEW OF GAS TURBINES TECHNOLOGY AND APPLICATIONS

  • Simple cycle Gas Turbines;
  • Cycle considerations;
  • Applications;
  • Fuels and corrosion;
  • Emissions;
  • Combined cycle and cogeneration

OVERVIEW OF DEVELOPMENTS HIGH TEMPERATURE TURBINES

  • Reheat turbines,
  • Close cycles, and
  • Other developments

ROTATING COMPONENTS AND MATCHING

  • Overview of compressor and turbine design;
  • Component characteristics and matching
  • Compressor surge and prevention

Day 2

VIBRATION AND ROTOR DYNAMICS

  • A review of vibration includes specific problems such as Blade Vibration and Shaft Critical Speeds.
  • Case histories link vibration with the fatigue failure of components.
  • Rotor instability, in its various forms
  • Vibration spectrum analyses utilized for the solution of resonance, instability, and gear and blade problems.
  • Campbell (Spoke) diagrams and Critical Speed maps derived and used for the solution of vibration and Rotor Dynamic problems.
  • The design and performance of Squeeze-Film Damper Bearings for overcoming many of the problems associated with machine unbalance and critical speeds,

COMBUSTORS AND FUELS

  • Combustor Types
  • Chamber design,
  • Fuel atomization,
  • Ignition and combustor arrangements
  • The constraints imposed by fuels on the design and operation of the hardware.
  • The wide spectrum of fuels, both gaseous and liquid
  • An overview of fuel treatment and additives

GAS TURBINES PERFORMANCE

GAS TURBINE PERFORMANCE ANALYSIS

  • Basic thermodynamic aspects of stationary Gas Turbines.
  • Design and off-design operation
  • Influence of site effects on typical performance maps.
  • Variable geometry compressor and turbine status

Day 3

PERFORMANCE ANALYSIS FOR PROBLEM DETECTION

  • The fundamental concepts of performance analysis as a tool for saving energy costs are discussed.
  • Basic and applied thermodynamics will be reviewed for gas turbines.
  • The use of performance data to pinpoint problem areas will be discussed.
  • Diagnostics related to fouling, nozzle erosion, bowing surge, choke, etc. will be covered. Meaningful trending methods will also be discussed.

GAS PATH ANALYSIS FOR STATIONARY GAS TURBINES – STATUS

  • Simulation of degraded Gas Turbines,
  • Derivation and application of fault coefficient matrix,
  • Fault trees and other techniques.
  • Implications for component life and emissions

Day 4

GAS TURBINE FOULING

  • The causes, effects and detection of fouling in axial compressors including Aerothermodynamics effects,
  • Effects on surge margin,
  • Intake distortion and balding problems
  • Filtration and control techniques

GAS TURBINE REPAIR

  • The techniques of inspection and repair of gas turbines
  • NDT techniques, cleaning, plating, heat treatment, welding, etc

Day 5

MAINTENANCE

  • Case histories of various types of failures and maintenance problems of onshore and offshore gas turbine compressor installations
  • Maintenance techniques using borescope and spectrum analysis including acoustic monitoring
  • Techniques for checking and conducting repairs on impellers, diffusers, bearings, couplings, and foundation repair

SPECIAL CONSIDERATIONS FOR CHP GAS TURBINES

  • special considerations in design
  • Operation and maintenance of turbines and associated equipment on Cogeneration Services
  • Off design operation effects on HRSG
  • STTG Cycles and evaporate cooling

Course Methodology

A variety of methodologies will be used during the course that includes:

  • (30%) Based on Case Studies
  • (30%) Techniques
  • (30%) Role Play
  • (10%) Concepts
  • Pre-test and Post-test
  • Variety of Learning Methods
  • Lectures
  • Case Studies and Self Questionaires
  • Group Work
  • Discussion
  • Presentation

Who should attend

The course is designed for operators those working in operations of gas turbine and the will gain a lot if benefits and value from the course.

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