Reconsider the vapor power cycle of Example 8.1, but include in the analysis that the turbine and the pump each have an isen- tropic efficiency of 85%. Determine for the modified cycle (a) the # thermal efficiency, (b) the mass flow rate of steam, in kg/h,for a net power output of 100 MW# , (c) the rate of heat transfer Qin into the working fluid as it passes through the boiler, inMW, (d) the rate of heat transfer Qout from the condensing steam as it passes through the condenser, in MW, (e) the mass flowrate of the condenser cooling water, in kg/h, if cooling water enters the condenser at 15 C and exits as 35 C. Discuss the ef-fects on the vapor cycle of irreversibilities within the turbine and pump.SolutionKnown: A vapor power cycle operates with steam as the working fluid. The turbine and pump both have efficiencies of 85%. Find: Determine the thermal efficiency, the mass flow rate, in kg/h, the rate of heat transfer to the working fluid as it passes through the boiler, in MW, the heat transfer rate from the condensing steam as it passes through the condenser, in MW, and the mass flow rate of the condenser cooling water, in kg/h. Discuss.
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