i) Sketch the cycle on a p-V diagram ii) Calculate the network for the cycle in kJ iii) Calculate the heat transfer for process 1-2 iv) Show that ƩW = ƩQ

Water undergoes two processes in series: • 1 to 2: isentropic (internally reversible and adiabatic) compression from 0.1 MPa and the phase of water is “saturated vapor” to 0.5 MPa• 2 to 3: a reversible isothermal process to 1.5 MPaa) Draw the overall process on a T-s diagram. Clearly indicate all states and the values of the relevant intensive properties on your diagram. b) Is process 2 to 3 a compression, expansion, or isochoric process? How do you know? c) Determine the overall specific work (w13) and specific heat transfer (q13) for this complete process. (Hint: recall that Q int rev =∫ T ds21 for an internally reversible process between states 1 and 2.)

A power cycle consisting of the three processes: Process 1-2: Constant volume to P2 Process 2-3: Polytropic expansion Pv=c, use k=1.28 Process 3-1: Compression at constant pressure Assuming 2.5 kg carbon dioxide as the working substance with P₁= 1.5 bar, P₂= 6 bar, T₁=350 K and neglecting kinetic and potential energy effects: a) sketch cycle in P-v diagram b) calculate thermal efficiency CO₂ molar mass = 44. CO₂ specific heat cy=1.014 kJ/kg/K