The objective of this course, in the gas turbine series, is to present the main construction and design features of combined cycle generators as used for power generation. The course presents the following concepts:
• Recovery of exhaust heat through the HRSG (Heat Recovery Steam Generator)
• The advantage of dual pressure and triple pressure HRSG's
• Applications of HP steam, IP steam, and LP steam
• Feedwater heating by the economizer
• Configurations of combined cycle units
• The use of back pressure turbines to provide steam for process use
• Typical steam turbine arrangements for combined cycle units
• Gland steam system operation
• Start-up and operation of the combined cycle unit
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