Abstract
A gas turbine, also called a combustion turbine, is a rotary engine that extracts energy from a flow of combustion gas. The essential features of a gas turbine are the compressor, combustion chamber/s, and gas turbine. Compared with conventional steam power plants with large steam generators and bulky condenser, gas turbines, along with associated systems, are small in size and mass. Gas turbines offer flexibility in using a range of liquid and gaseous fuels. There are two basic types of gas turbines: aero derivative and industrial. The operation of a gas turbine follows the Brayton cycle. Performance of a gas turbine is improved by adopting regeneration, compressor intercooling, turbine reheat, water injection, cogeneration, combined cycle, and Cheng cycle. HRSG is used in a combined cycle power station, where hot exhaust from a gas turbine is fed to the HRSG to generate steam, which in turn drives a steam turbine.
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