Gas Turbine Series

The objective of this course is to highlight the main features of the aero-derivative type of gas turbine, drawing attention in particular to the difference when compared with the heavier industrial machines.

Upon completion of this course, the participant should understand and be able to apply the following concepts:

• Suitability for application as standby generating units
• Quick start-up and loading
• Ability to perform “Black Start”
• Application of the aero jet-engine as a hot gas generator
• Use of a free turbine in the hot gas path
• Two shaft machines
• Three shaft machines
• H.P. and L.P. compressors
• Shaft speeds – N1, N2, N3
• Bearing arrangements
• Start-up by air drive to N2 shaft
• Bleed valves, automatic operation
• Annular combustors
• Pressure atomization of liquid fuel
• Start-up atomizing air assist
• Multiple fuel nozzles per combustor
• Exhaust gas temperature of the gas generator (typical)
• Twin-pac units (two GTs per generator)
• Support systems – mechanical drive auxiliaries
• Lube oil and fuel systems
• Fire protection
• Cooling systems
• Water wash system
• Operator interface
• Control panel arrangements
• Indications, controls and alarms
• Auto – controls; control modes
• Protective systems and tripping arrangements
• Operating procedures; start-up, loading, and shut-down
• Control by gas generator exhaust temperature
• Effect on unit output and efficiency of inlet air temperature