gives the schematic of a vapor power plant in which water steadily circulates through the four components shown. The water flows through theboiler and condenser at constant pressure and through the turbine and pump adiabatically. Kinetic and potential energy effects can be ignored. Process datafollow:
Process 4–1: constant-pressure at 1 MPa from saturated liquid to saturated vapor
Process 2–3: constant-pressure at 20 kPa from x2 = 88% to x3 = 18%
(a) Using Eq. 5.13 expressed on a time-rate basis, determine if the cycle is internally reversible, irreversible, or impossible.
(b) Determine the thermal efficiency using Eq. 5.4 expressed on a time-rate basis and steam table data.
(c) Compare the result of part (b) with the Carnot efficiency calculated using Eq. 5.9 with the boiler and condenser temperatures and comment.
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