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Discussion :: Compressors, Gas Turbines and Jet Engines

  1. Work ratio of a gas turbine may be improved by

    2. A.

     Decreasing the compression work
    B.

     Increasing the compression work
    C.

     Increasing the turbine work
    D.

     Both (A) and (C) above

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    Workspace

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    Answer : Option D

    Explanation :

    -Increase the turbine inlet temperature provided the turbine materials can stand the temperature or one has access to replacement parts that can withstand the temperatures. -Increase the pressure ratio. There is a limit to the efficiency increase depending upon the turbine inlet temperature. One can concievably increase the pressure ratio to a point that the increased work is never recovered because the expansion across the turbine is inadequate to recover the work. - Power augmentation through steam injection. -On turbines with HP and LP turbine separated, apply reheat.

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