Determine the isentropic efficiency of a turbine

[Kuddus]

Homework Statement

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.

Homework Equations

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

The Attempt at a Solution

 

[Andrew Mason]

Homework Statement

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.

Homework Equations

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

The Attempt at a Solution

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