a.) The work for each process (W12, W23 and W31) in kJ. b.) The heat transfer fo

Question

a.) The work for each process (W12, W23 and W31) in kJ.

b.) The heat transfer for each process (Q12, Q23 and Q31) in kJ.

c.) The overall efficiency of the cycle.

Gas in a closed system undergoes the power cycle as shown in the p-v diagram below as described by 1->2 is a constant pressure process, 2-> 3 is a constant volume process and 3 -> 1 is a pV = const. process. The internal energy U1 = U2 = 30 kJ/kg and U3 = 50 kJ. The changes in kinetic and potential energies are zero. Determine: a.) The work for each process (W12, W23 and W31) in kJ. b.) The heat transfer for each process (Q12, Q23 and Q31) in kJ. c.) The overall efficiency of the cycle.

Explanation / Answer

a)

W12 = P1*(V2

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