# Rankine cycle with reheat

Cycle data

Known properties
• Water is used as working fluid;
• Pressure at the outlet of the low pressure turbine of 10 kPa;
• Pressure at the outlet of the high pressure turbine of 200 kPa;
• Pressure at the pump outlet of 1000 kPa;
• Temperatures after leaving the boiler of 250 °C;
• The pump has an isentropic efficiency of 90%;
• The turbines have an isentropic efficiency of 80%.
Input code
using CycleSolver

@solve begin
st3.T = 250 + 273
st5.T = 250 + 273
st3.p = 1000
st5.p = 200
st1.p = 10

newCycle[]
pump(st1, st2, 90)
boiler(st2, st3)
turbine(st3, st4, 80)
boiler(st4, st5)
turbine(st5, st6, 80)
condenser(st6, st1)
end

PrintResults()

# 1- CYCLE [water]

State
Name
T [K] P [kPa] h [kJ/kg] s [kJ/kg.K] x ṁ [kg/s] Mass-flux
fraction
st1 318.956 10.0 191.806 0.6492 0.0 1.0
st2 319.016 1000.0 192.917 0.6495 1.0
st3 523.0 1000.0 2942.79 6.9258 1.0
st4 393.36 200.0 2690.28 7.0863 0.9928 1.0
st5 523.0 200.0 2970.91 7.7094 1.0
st6 318.956 10.0 2549.14 8.04 0.9855 1.0

### Cycle Properties:

Total Component Value
qin
Q̇in
3030.508 kJ/kg
0.0 kW
boiler:
st2 >> st3

boiler:
st4 >> st5
2749.8738 kJ/kg

280.6342 kJ/kg
qout
Q̇out
2357.3323 kJ/kg
0.0 kW
condenser:
st6 >> st1
2357.3323 kJ/kg
win
Ẇin
1.1111 kJ/kg
0.0 kW
pump:
st1 >> st2
1.1111 kJ/kg
wout
Ẇout
674.2868 kJ/kg
0.0 kW
turbine:
st3 >> st4

turbine:
st5 >> st6
252.5148 kJ/kg

421.772 kJ/kg