Concept explainers
Air is expanded in a steady flow process through a turbine. Initial conditions are 1300°C and 2.0 MPa absolute. Final conditions are 500°C and atmospheric pressure. Show this process on a Ts diagram. Evaluate the changes in internal energy, enthalpy, and specific entropy for this process.
The change in internal energy, enthalpy, specific entropy and show this process on a T-s diagram.
Explanation of Solution
Given:
Initial temperature
Initial pressure
Final temperature
Final pressure
Calculation:
Determine the change in internal energy.
Thus, the change in internal energy is
Determine the change in enthalpy.
Thus, the change in enthalpy is
Determine the change in specific entropy.
Thus, the change in specific entropy is
Draw the T-s diagram as in Figure (1).
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