Production Process at Khanom Power Plant Unit 4

Khanom Power Plant Unit 4 is a single shaft combined cycle power plant comprising two gas and two steam turbine units. Each unit of combined gas and steam turbines is installed on the same shaft of the generator.

In the power generation process, outside air is channeled through the filter air intake unit to the compressor. Compressed air is then transmitted to the combustion chamber where it is mixed with natural gas (or diesel oil in emergencies). The combustion chamber then ignites and burns the gas. Hot gas will be used to drive the gas turbine, the shaft of which directly connects with the generator.

When the gas turbine spins, the generator shaft spins accordingly to generate electricity. Exhaust gas will then be transmitted to the heat recovery steam generator (HRSG). The hot steam transfers heat to the water in the pipe to create high pressure steam that drives the steam turbine. The shaft of the steam turbine directly connecting with the generator will cause induction to produce electricity. The remaining hot steam in the HRSG will be released through the stack. Voltage of electricity from the generator will be increased before being transmitted to the high-voltage electricity station through a power pipeline.