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Ideal Rankine Cycle \( \cdots \) Efficiency to be realized Steam is the working fluid in an ideal Rankine cycle (i.e. no irreversibilities present). Your aim is to realize a thermal efficiency of \( 30 \% \). The condenser should operate at pressure \( p_{2}=p_{3}=0.1 \) bar. The quality at the outlet of the turbine, i.e. at state 2 , is given as \( \mathrm{x}_{2}=0.9 \). Assume that saturated liquid exits the condenser. a) Determine pressure \( p_{1} \), in bar, and the temperature \( T_{1} \), which is necessary to achieve the desired efficiency, by using the attached h-s diagram. Mark both states, i.e. 1 and 2 clearly! b) Taking an arbitrary isentropic efficiency into account, sketch the real expansion process in the turbine in the attached h-s diagram. Assumptions: Assume that the turbine operates under isentropic conditions and that the enthalpy at state 3 is approximately equal to the enthalpy at state 4 .
h-s diagra

a) Starting at the inlet to the first turbine stage, the pressure is 8.0 MP