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Determine the isentropic efficiency of a turbine

  1. Jun 16, 2009 #1
    1. The problem statement, all variables and given/known data
    Neon gas at the rate of 100kg/min enters an adiabatic turbine at a temperature and pressure of 1073K and 1.5 MPa. The gas leaves the turbine at a pressure of 200kPa. If the real(actual) power output of the turbine is 370 kW, determine the isentropic efficiency of the turbine.


    2. Relevant equations
    Cp=0.5203 kJ/(kg.K)
    y(gamma)=1.667


    3. The attempt at a solution
     
  2. jcsd
  3. Jun 17, 2009 #2

    Andrew Mason

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    Kuddus, there is a reason for item 3. You have to attempt a solution or explain your thinking. For a start, is energy conserved here? Since the process is adiabatic, what does that tell you about the total energy? Where does the change in energy of the gas go?

    What does isentropic mean? If the process was isentropic, what would the work output be? How does it compare to the actual work done?

    AM
     
    Last edited: Jun 17, 2009
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