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Problem2:


A confined quantity of ideal gas with R=0.3 kJ/kgK and constant Cv= 0.7Kj/KgK

undergoes a power cycle consisting of two thermodynamic processes from an initial equilibrium state where the temperature is 27 c and the absolute pressure is 1 bar. First, the system is compressed to one tenth ( 1/10) of its initial volume in a process where the relationship PV^1.4 is maintained constant . Then, the system is taken back to its initial condition in a process where the pressure and volume are related linearly (P=aV+b).


a) Complete the property table below:

state 1 2

P (bar)

T(c)

v(m^3/kg)

Screen Shot 2019-10-01 at 11.59.41 AM.png

b)Sketch the process in a P-V Diagram:


c) Compute the net specific work Wnet in kJ


d) Compute the cycle efficiency n= Wnet / q in


Tables here

Screen Shot 2019-10-01 at 11.59.41 AM.png

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