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Which of the following is an INCORRECT advantage of gas turbine power plants over diesel power plants?
1. Gas turbine power plants have lower installation and maintenance cost.
2. Gas turbine power plants display higher mechanical efficiency.
3. The work developed per kg of air is large.
4. Gas turbine power plants have a comparatively longer life.

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Correct Answer - Option 4 : Gas turbine power plants have a comparatively longer life.

Difference between the Gas turbine and Diesel engine Plant:

Components

  • In the gas turbine, the compressor, combustion chamber, and power turbine are important components.
  • In the diesel engine, pistons, connecting rods, crankshafts, cylinder, exhaust valve, combustion chamber, and bearing caps are important components.

 

Longevity:

  • The gas turbine lasts for about 20 years or more.
  • The diesel engine lasts for 30 years or more.
     

Maintenance Cost:

  • The gas turbine requires more maintenance cost.
  • The steam turbine requires fewer maintenance costs.

 

Fuel:

  • The gas turbine can use many kinds of flammable gases and liquids as fuel. For example, gasoline, light oil, kerosene, alcohol, natural gas, and hydrogen. Regenerative fuels such as alcohol and methane have lately attracted considerable attention and gas turbine is well fit for them.
  • The most common type of diesel engine fuel is a specific fractional distillate of petroleum fuel oil, but alternatives that are not derived from petroleum, such as biodiesel, biomass to liquid (BTL), or gas to liquid (GTL) diesel, are increasingly being developed and adopted.
     

Conclusion: Gas turbine power plants have less life in comparison to diesel turbines.

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