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()

Output:

1- CYCLE [water]

State Name	T [K]	P [kPa]	h [kJ/kg]	s [kJ/kg.K]	x	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

Rankine cycle with reheat

Output:

1- CYCLE [water]

Cycle Properties:

Thermal efficiency (n) = 22.2133 %