A)
Interpretation:
Outlet pressure and the rate of work produced has to be determined.
Concept introduction:
The expression for the reversible process for a turbine is given as follows:
Here, turbine inlet and outlet molar entropy is
The expression for the change in entropy as given as follows:
Here, constant pressure heat capacity on a mass basis is
The expression for the work produced in the turbine is given as follows:
Here, actual temperature of the exiting stream is
B)
Interpretation:
The actual temperature of the exiting stream has to be determined.
Concept introduction:
Write the expression for the work produced in the turbine is given as follows:
Here, actual temperature of the exiting stream is
The expression for the efficiency of the turbine;
Here, actual rate of work produced is
Write the entropy balance for the reversible turbine.
C)
Interpretation:
The actual temperature of the exiting stream has to be determined.
Concept introduction:
Write the energy balance to calculate the rate of work produced
Write the entropy balance for the reversible turbine.
Here, molar entropy for an ideal gas state at state 2 and 1 is
D)
Interpretation:
The actual temperature of the exiting stream has to be determined.
Concept introduction:
Write the expression for the work produced in the turbine is given as follows:
Here, actual temperature of the exiting stream is
The expression for the efficiency of the turbine;
Here, actual rate of work produced is
Write the entropy balance for the reversible turbine.
Here, molar entropy for an ideal gas state at state 2 and 1 is
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Chapter 6 Solutions
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