|
1. Startup and Ignition Failures
Symptoms: Failure to start, long ignition times, or repeated startup aborts.
More Info: https://www.marketresearchfuture.com/reports/aeroderivative-gas-turbine-service-market-40538
Possible Causes:
Fuel system blockages or malfunctions.
Faulty igniters or ignition cables.
Inadequate air supply or incorrect purge cycle.
Control system logic errors.
Troubleshooting Tips:
Verify fuel pressure and purge lines for leaks or blockages.
Inspect and test igniter plugs and cables for wear or carbon buildup.
Ensure control system parameters and sequences are correctly programmed.
Run diagnostic software to detect failed sensors or actuators.
2. Combustion Instability and Flameout
Symptoms: Flame oscillation, unexpected flameout, or vibration during operation.
Possible Causes:
Fuel/air mixture imbalance.
Blocked fuel nozzles or damaged combustion liners.
Inlet air temperature fluctuations.
Control system delay or misalignment.
Troubleshooting Tips:
Check and clean fuel injectors.
Analyze combustion dynamics using vibration and acoustic monitoring.
Adjust fuel scheduling and verify inlet guide vane (IGV) settings.
Ensure proper synchronization between the control system and combustion dynamics.
3. Compressor Fouling or Surge
Symptoms: Loss of efficiency, abnormal pressure ratios, surging noise.
Possible Causes:
Accumulation of dirt, oil, or other contaminants on compressor blades.
Rapid changes in load demand or operating outside design conditions.
Malfunctioning variable stator vanes (VSVs).
Troubleshooting Tips:
Perform offline or online compressor water wash.
Inspect air filters and ensure regular maintenance schedules.
Monitor compressor map and adjust IGVs and VSVs accordingly.
Evaluate surge detection systems and control parameters.
4. Hot Section Component Failures
Symptoms: Temperature spikes, reduced power output, and excessive exhaust gas temperature (EGT).
Possible Causes:
Turbine blade wear, cracking, or erosion.
Improper fuel combustion leading to hotspots.
Cooling system inefficiencies.
Troubleshooting Tips:
Conduct regular borescope inspections of turbine blades and vanes.
Review combustor patterns for signs of localized overheating.
Ensure that the cooling air flow paths are not obstructed or degraded.
5. Oil and Lubrication System Issues
Symptoms: Oil leaks, high bearing temperatures, or pressure fluctuations.
Possible Causes:
Worn seals or fittings.
Clogged oil filters or insufficient oil flow.
Pump or gearbox failures.
Troubleshooting Tips:
Monitor oil pressure and temperature trends through SCADA systems.
Replace oil filters and check for metallic particles indicating wear.
Conduct infrared thermography to identify potential hot spots.
|
