Gas Turbine Series

The objective of this course is to continue the discussion on combined cycle installations with particular focus upon the HRSG, and associated condensate and feed systems. Upon completion of this course, the participant should understand and be able to apply the following concepts:

• Heat transfer
• Natural circulation and forced circulation
• Typical HRSG construction
• Function of economizer, evaporator, superheater
• Steam drum internals
• Steam drum external connections
• Steam fundamentals, saturation, wet steam, superheat
• Pendant and horizontal superheater construction
• Superheater drains and vents
• Steam temperature control, desuperheater
• Reheater arrangements
• Function of safety valves
• Multi-pressure HRSG’s
• Dampers, air sealing arrangements
• Fired section, fuel system, control
• Location of SCR for NOx control
• Monitoring gas temperature through the HRSG
• Effect of low stack temperature: dew point
• Condensate and feedwater system
• Condensate pump pressure
• Extraction heating and condensate preheating by gas
• Deaeration: Deaerator pressure and temperature
• Feed pumps; Pressure requirements, recirculation
• Cycle control: D/A level, hotwell level
• Make-up; Demineralizer
• HRSG trips – causes and effects
• Drum – level; three element control
• Boiler water control, limits, blowdown