Problem

You are given various parameters for designing a Rankine cycle with one open feedwater hea...

You are given various parameters for designing a Rankine cycle with one open feedwater heater and one reheater. The steam enters the turbine at 18 MPa and 550°C, and the condensate leaves the condenser at 12 kPa as a saturated liquid. Steam can be extracted from the turbine at pressures of 4 MPa and 800 kPa. The steam returns to the turbine from the reheater at 550°C. Consider the isentropic efficiency of the turbine to be 0.80 and the isentropic efficiency of each pump to be 0.70. Determine whether a higher thermal efficiency is obtained by having the reheat at 4 MPa and the feedwater heater at 800 kPa, or if the feedwater heater should be at 4 MPa and the reheat at 800 kPa.

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