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Combined Cycle Steam and Feedwater Operating Principles

Learning Objectives

  • Describe the system flow path of a basic single-pressure cycle
  • Describe the function of the following components of a HRSG:
    • Economizer
    • Evaporator
    • Superheater
  • Explain the concept of a pinch point
  • Describe the system flow path of a dual-pressure (HP and LP) cycle
  • Describe the system flow path of a triple-pressure (HP, IP, and LP) cycle
  • Explain the purpose of a pegging steam line
  • Describe the system flow path of a triple-pressure cycle with reheat
  • Explain the operation of a HRSG feedwater pump
  • Describe the function of a steam attemperator

Available in English

45 Minutes

When you complete this lesson, you will be able to describe the feedwater and steam flowpaths in a typical combined cycle power plant. You will also be able to explain the HRSG design principles governing plant operation.