CT309 - Fundamentals of Gas Turbine Maintenance

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3 days - 1.6 Continuing Education Units Awarded

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In today's environment it is important to be properly prepared for turbine outages. Even if you are not expected to be the "technical advisor", it is still important for you to appreciate all the activities that are important to the outage plan and its implementation. This Seminar is intended to improve the effectiveness of your combustion turbine maintenance activities. Reduce forced outages and increased unit reliability and availability can be the result.
We start by reviewing the basics. One cannot implement an effective outage plan if one does not understand the fundamentals of how a combustion turbine functions. Learn how operating duty affects turbine components AND how the integrity of turbine components affects operations. Learn important issues associated with disassembly / reassembly. Equipment needs to be taken apart safely and properly. Learn what components should be cleaned and how. Learn the basics of a good visual inspection and what mechanical / electrical tests might be performed. Finally, you will learn some of the control concepts as this will certainly impact how well the unit is returned to service.
Topics include: Construction • Auxiliary System O&M • Outage Planning • Disassembly • Inspection • Repairs
This Seminar has been designed for plant personnel who are involved in safely and effectively operating and maintaining combustion turbines.
Upon successful completion of this Seminar the participant should be able to:
  1. State the purpose of a combustion turbine.
  2. Describe the major components making up the combustion turbine.
  3. Describe those systems associated with combustion turbines.
  4. Describe the sequencing that occurs in a normal startup, synchronization and operation.
  5. Describe the different fuel systems and requirements for operation.
  6. Demonstrate having the knowledge necessary to use effective and safe maintenance procedures.
  7. Demonstrate the ability to properly plan a maintenance outage prior to shutdown.
  8. Demonstrate the knowledge necessary to measure and interpret information as it relates to the unit outage.
  9. Demonstrate the knowledge necessary to disassemble/reassemble equipment in an orderly and safe manner.
  10. Demonstrate the knowledge necessary to properly clean and inspect combustion turbine components.
  11. Describe fundamental combustion turbine control concepts and protective features.
  1. Combustion (Gas) Turbine Fundamentals: Basic Cycle: Gas Turbine Relationships, Power Relationships between Compressor, Combustor and Turbine
  2. Turbine Construction & Operating Principles: Turbine Function, Turbine Flow, Inlet Guide Vane & Casing, Compressor Section, Combustion Section, Turbine Section, Exhaust Section, Bearings, Compressor Spindle/Rotor, Turbine Spindle/Rotor, Cooling and Sealing Air, Fuel Oil, Fuel Forwarding System
  3. Turbine Auxiliary Systems: Lube Oil System, Hydraulic Supply, Cooling Water Supply
  4. CT Controls Overview: Control Philosophy, Major Components, Speed Control, Temperature Control, Alarm & Protection
  5. Maintenance Preparation & Planning: Periodic Inspections, Records, Running Inspections, Combustion Section Inspection, Turbine Inspection, Major Inspection, Documentation, Component and Parts Requirements, Safety, Tools & Measuring Equipment, Scheduling
  6. Combustion Section Inspection: Accessibility, Parts Identification, Fuel System, Ignition and Flame Detection, Combustion Components, Borescope Inspection, Inspection Data, Reassembly
  7. Turbine Inspection: Accessibility, Turbine Shell Disassembly, Nozzle Disassembly, Inspection, Reassembly
  8. Major Inspection: Accessibility, Disassembly, Bearings, Rotor, Compressor Stator, Reassembly
  9. Alignment: Readings, Procedure
  10. Startup & Test: Pre-Startup Checks, Startup Checks, Evaluation