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# Rankine Open Cycle

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Rankine Open Cycle has an Ideal steam reheat cycle where steam enters the high pressure turbine at 3 MPa and 400C and then expands to 0.8 MPa. It's then reheated at constant pressure of 0.8 MPa to 400C and expands to 10kPa in the low-pressure turbine. Each turbine stage is entropic efficiency of 85% FWH is open T-S diagram for cycle?

What is thermal efficiency and the moisture content of the steam leaving the low-pressure turbine?

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P3=3MPa, T3=400Ã?°C
P4=0.8MPa
P5=P4=0.8MPa, T5=400Ã?°C
P6=10KPa
Eff-Isen=0.85%
Eff-thermal=1-(qout/qin)
qin=(h3-h2)+(h5-h4)
Eff-Isen=(h5-h6)/(h5-h6s)=(h3-h4)/(h3-h4s)
s5=s6=7.5716 ...

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