A saturated power cycle uses steam at 1100 psia and a conden

A saturated power cycle uses steam at 1100 psia and a condenser pressure of 10 psia. This power plant requires annual turbine maintenance that lasts at least 3 weeks. Federal regulation have limited the thermal power to 85% of its full value the efficiency of the plant is 0.991 0.794 0.743 0.670 0.653 0.673 0.438 0.257

Solution

A year has 52 weeks.

Shutdown period = 3 weeks

shutdown time = 3/52 = 0.0577

Actual run time = 1 - 0.0577 = 0.9423

85% of 0.9423 = 0.801

Hence, max. capacity factor = 0.801 Option d is correct.