Ideal Rankine Cycle
Energy analysis: steady flow process, no generation, neglect KE and PE changes for all four devices,
0 = (net heat transfer in) - (net work out) + (net energy flow in)
0 = (qin - qout) - (Wout - Win) + (hin - hout)
? Wpump = h2 - h1 = v(P2-P1)
- 2-3: Boiler (W=0) ? qin = h3 - h2
- 3-4: Turbine (q=0) ? Wout = h3 - h4
- 4-1: Condenser (W=0) ? qout = h4 - h1
Thermal efficiency h = Wnet/qin = 1 - qout/qin = 1 - (h4-h1)/(h3-h2)
Wnet = Wout - Win = (h3-h4) - (h2-h1)