Question

A steam power plant operates on the cycle of Fig. 8,4, For one of the following sets of operating conditions, determine the steam rate, the heal-transfer rates in the boiler and condenser, and the thermal efficiency of the plant.
(a) P1 = P2 = 10000 kPa; T2 = 600oC: P3 = P4 = 10 kPa. ή(turbine) = 0.80;
ή(pump) = 0.75; power rating = 80,000 kW.
(b) P1 = P2 = 7000 kPa; T2 = 550oC; P3 = P4 = 20 kpa; ή(turbine ) = 0.75;
ή(pump) = 0.75; power rating = 100000 kW.
(c) P1 = P2 = 8500 kPa; T2: = 600oC; P3 = P4 = 10 kPa; ή (turbine) = 0.80;
ή(pump) = 0.80; power rating = 70.000 kW.
(d) P1 = P2 = 6.500 kPa; T2 = 525oC; P3 = P4 = 101.33 kPa; ή (turbine) = 0.78;
ή (pump) = 0.75; power rating = 50.000 kW.
(e) P1 = P2 =950(psia); T2 = 1.000(oF); P3 = P4 = 14.7(psia); ή (turbine) = 0.78;
ή (pump) = 0.75; power rating = 50.000 kW.
(f) p1 =P2 = l,125(psia); T2 = 1100(oF); P3 = P4 = l(psia): ή (turbine) = 0 80:
ή(pump) = 0.75; power rating = 80.000 kW,

Answer 1

(f) p1 =P2 = l,125(psia); T2 = 1100(oF); P3 = P4 = l(psia): ή (turbine) = 0 80:

ή(pump) = 0.75; power rating = 80.000 kW,

The following vectors contain values for Parts (a) through (f).

Enthalpies and entropies for superheated vapor, Tables F.2 and F.4 @ P2 and T2 

 

Sat. liq. and sat. vap. Values from Tables F.2 and F.4 @ P3 = P4:

 

 

 

 

 

Results follow: