solution


Modify the ideal Rankine cycle of Problem 8.5 to include superheated vapor entering the first turbine stage at 18 MPa, 560C, and one open feedwater heater operating at 1 MPa. Saturated liquid exits the open feedwater heater at 1 MPa. Determine for the modified cycle

(a) the net work, in kJ per kg of steam entering the first turbine stage.

(b) the thermal efficiency.

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(c) the heat transfer to cooling water passing through the condenser, in kJ per kg of steam entering the first turbine stage.

Reconsider the cycle of Problem 8.30, but include in the analysis that each turbine stage and pump has an isentropic efficiency of 85%.

 
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