GAS TURBINE

Analyze the impact of regeneration on the performance and design of an open cycle gas turbine.

• Reduces compressor work, improves net output

• More power output via second combustion stage

• Saves fuel by reclaiming exhaust heat

What thermodynamic cycle does a gas turbine operate on?

• Otto Cycle

• Diesel Cycle

• Brayton Cycle

• Rankine Cycle

What is the main purpose of the compressor in a gas turbine?

• Burn fuel

• Increase pressure of incoming air

• Exhaust hot gases

• Generate electricity

Which of the following is an advantage of gas turbines in marine application?

• Low maintenance cost

• High power-to-weight ratio

• Operates efficiently at low loads

• Low fuel consumption

What component follows immediately after the combustion chamber in a gas turbine?

• Air intake

• Exhaust

• Turbine

• Intercooler

In a two-shaft gas turbine, the power turbine is:

• Mechanically coupled to the gas generator

• Directly connected to the starter motor

• Independent from the gas generator shaft

• Only used during startup

Gas turbines are more efficient at partial loads compared to diesel engines.

• TRUE

• FALSE

The exhaust in a gas turbine is responsible for discharging hot gases after energy extraction.

• TRUE

• FALSE

Describe engineering methods (Intercooling) used to improve the thermal efficiency of an open cycle gas turbine

• Reduces the work required by the compressor by cooling the air between compression stages, resulting in improved net work output.

• Involves heating the working fluid again between turbine stages to extract more energy, increasing thermal efficiency.

• Recovers waste heat from exhaust gases to preheat the compressed air before combustion, thus reducing fuel consumption.

Describe engineering methods ( Regeneration) used to improve the thermal efficiency of an open cycle gas turbine. Support your answer with a brief explanation for each method.

• Recovers waste heat from exhaust gases to preheat the compressed air before combustion, thus reducing fuel consumption.

• Involves heating the working fluid again between turbine stages to extract more energy, increasing thermal efficiency.