PIPE Gas Turbine Plant Pt. 2

The exhaust temperature which makes the exhaust an ideal heat source for combined cycles is typically

• 540 C to 590 C

• 600 C to 650 C

• 300 C to 350 C

• 440 C to 490 C

Most combustion turbines have

• 2 to 3 expander stages

• 3 to 4 expander stages

• 4 to 5 expander stages

• 1 to 2 expander stages

The exhaust flow rate in modern heavy duty turbines per 100 MW is approximately

• 240 to 250 kg/s

• 140 to 150 kg/s

• 340 to 350 kg/s

• 440 to 450 kg/s

The Brayton gas turbine cycle is also known as

• Joule cycle

• Stirling cycle

• Ericsson cycle

• Atkinson cycle

Approximately how many percent of the turbine power is used to drive high efficiency compressor?

• 50 to 75%

• 60 to 85%

• 45 to 70%

• 30 to 55%

Depending on turbine construction details, the temperature of the air entering the turbine will be between:

• 650 to 1000 C

• 750 to 1100 C

• 550 to 950 C

• 850 to 1200 C

Which of the following engines are typically used Turbojets and turboprop

• Open combustors

• Closed combustors

• Turbo combustors

• High combustors

The full load thermal efficiency of existing heavy duty combustion turbines in simple cycles is approximately:

• 34 to 36 %

• 30 to 32 %

• 40 to 42 %

• 26 to 28 %

New combustion turbines on cutting edge of technology (Advanced turbine systems) are able to achieve

• 38 to 38.5 %

• 36 to 36.5 %

• 40 to 40.5 %

• 34 to 34.5 %

Aeroderivative turbines commonly achieves efficiency up to

• 42 %

• 38 %

• 45 %

• 35 %