course | Combined Cycle Power Plant Operations and Troubleshooting

Module (01) Combined cycle
 

• Classifications of Power Plants.
• Types of combined cycles
• A single and Multi-pressure combined cycle plants
• Temperature distribution and efficiency.
• Efficiency calculations for combined cycle
• Efficiency and heat rate of combined cycles
• Selection of an appropriate cycle.
• Advantages and economics of combined cycle
• Comparison between combined cycle and conventional power plant.
• Comparison between single and multi-shaft combined cycle
• Advanced combined cycle.
• Second generation of combined cycle plants and state-of-the-art.
• Increasing worldwide use of combined cycles.

Module (02) Heat Recovery Steam Generator HRSG
 

• Common HRSG arrangements
• HRSG components: Drum, Economizer, Evaporator and Super heater
• Different designs of evaporator sections, namely A, O, D, I, and horizontal.
• Circulation ratio.
• Single, double, triple pressure HRSG,
• Arrangement of coils and Evaporator pinch design.
• Forced circulation and natural circulation.
• Difference between HRSG and conventional boilers.
• Quality of water and requirements of purity, pH values, etc
• Water treatment and dosing.
• Drum Level Controls
• Shrink and swell
• Types of level control systems
• Drum Level Measurements
• Live steam temperature control and attemperators

Module (03) Gas Turbines in Combined Cycles
 

• Inlet air and filtration systems.
• Weather hoods and Bird Screens
• Moisture Separators
• Different Types of Filters 
• Trash screen, Inlet plenum, and pill mouse.
• Effect of Compressor fouling on plant heat rate.
• Recommended wash and cleaning cycles.
• Compressor surge
• Inlet guide van (IGV)
• Inlet Guide Vane Control System
• Pulsation protection control
• Turbine Section
• Flow through blades
• Blade cooling
• Case study.
• Advanced turbine blades
• Gas Turbine Start-up and Shutdown
• Starting Systems: Static Starter

Module (04) Fuel system and combustion chambers in gas Turbines

• Types of combustion chambers
• Combustion chamber components
• Ignition system and Flame detector
• Emissions from gas turbines and NOx control
• Steam/water injection combustion chamber.
• Fuel staging and single-digit NOx control.
• Gas Fuel system 4.8 Liquid fuel system
• Diffusion flame 4.10 Premix flame.
• Mixed diffusion and premix flame
• Dry Low NOx technology combustion systems
• Typical example SGT6-5000F ULN burner

Module (05) Performance of Gas Turbine and the effect of Inlet cooling

• Determining ISO Power and ISO Heat Rate
• Correcting for Ambient Temperature, Altitude, Humidity,
• Different losses. 5.4 Part load heat rate
• Gas Turbine Inlet Air Cooling
• Evaporative cooler and Fogging system
• Mechanical refrigeration system (direct type)
• Mechanical refrigeration system (indirect type)
• Absorption chiller
• Performance Evaluation of Different Inlet Air Cooling Systems:
• Capital Cost Comparisons of Inlet Cooling Systems
• Thermodynamic calculation for the mechanical chiller system
• Power calculation for the mechanical chiller system

Module (06) Condensate System

• Steam Surface Condenser
• Condenser hotwell level gauge and control
• Vacuum Breakers
• Condenser vacuum systems
• Condenser leaks
• Deaerator

Module (07) Combined Cycle Power Plant Control

• Elements of the Governor.
• Why Is Droop Necessary and Droop Curve
• Uses of Droop
• Isolated Unit
• System Tied to a Utility Grid
• Principles of Hydraulic Amplifiers
• Hydraulic Fluid Accumulators
• The Valve Actuators
• Controlling Type Actuators
• Actuator servo valve
• The dump valve controller
• Non-Controlling Actuators (On-Off control actuators)
• Speed Control
• The load control
• Load Control and Frequency Response of a Combined Cycle
• Closed-loop load/ frequency control without separate steam turbine control
• Steam turbine separate control
• Digital electrohydraulic system.
• Fast Load Reduction (RUNBACK).
• Overspeed Limitation
• Over-speed protection controller (OPC).
• Overspeed Protection:
• Mechanical Over Speed Trip
• Electronic Overspeed Trips
• Emergency trip solenoid valve.