Data from a simple Rankine cycle power plant were measured to determine actual performance. The measured steam flow rate was 7 kg/s. The measured conditions of the water are shown in the following Table 4-4, which referred to Figure 4-4.
Table 4-4: Properties of inlet and outlet conditions
Data Device | Inlet conditions | Outlet conditions
Pump | P1 = 10 kPa; T1 = 45°C | P2 = 5.2 MPa; T2 = 50°C
Boiler | P3 = 5.1 MPa; T3 = 45°C | P4 = 5.0 MPa; T4 = 500°C
Turbine | P5 = 4.5 MPa; T5 = 420°C | P6 = 15 kPa; x6 = 0.9
Condenser | P6 = 15 kPa; x6 = 0.9 | P7 = 12 kPa; T7 = 45°C
Figure 4-4: A simple Actual Rankine Cycle
Determine;
(a) The rate heat addition (in kW)
(b) The net power produced (in kW)
(c) The heat rejection (in kW)
(d) The thermal efficiency of the cycle
(e) The turbine isentropic efficiency