Gas Turbine Series

The objective of this course, the first in the GAS TURBINE series, is to present the main construction and design features of gas turbines as used for power generation. Basic cycles are discussed, and different sizes and machine layouts are presented.

After completion of this course, the participant will be able to understand the following concepts and apply them to his day to day work activities.

• The gas-turbine cycle
• Conversion of heat to mechanical energy
• Typical values of temperature and pressure “through cycle”
• Single shaft and two shaft arrangements
• Exhaust heat recovery
• The basic combined cycle
• Axial flow and centrifugal flow compressors
• Effect of pressure ratio on efficiency
• Potential for compressor stall at start-up
• Variable inlet guide vanes
• Combustor arrangements
• Combustion air, and secondary air
• Factors affecting air temperature rise through the combustion section
• Control of gas turbine output
• Combustion igniters, and flame detectors
• Water and steam injection
• Distribution of turbine energy; to compressor, generator, auxiliaries, and stack
• Gas turbine efficiency
• Regenerative heat exchangers
• Turbine reheat cycle
• Significance of gas temperature at turbine inlet
• Turbine blade cooling
• Turbine stage seals
• Turbine rotor assembly and stator assembly
• Exhaust frame arrangements
• Gas-turbine starting arrangements
• Accessory gear box drive to auxiliaries