A steam power plant operates on an ideal reheat–regenerative Rankine cycle with one re-heater and two open feedwater heaters. Steam enters the high-pressure turbine at 1500 psia and 1100°F and leaves the low-pressure turbine at 1 psia. Steam is extracted from the turbine at 250 and 40 psia, and it is reheated to 1000°F at a pressure of 140 psia. Water leaves both feedwater heaters as a saturated liquid. Heat is transferred to the steam in the boiler at a rate of 4 = 105 Btu/s. Show the cycle on a T-s diagram with respect to saturation lines, and determine (a) The mass flow rate of steam through the boiler,
(b) The net power output of the plant, and
(c) The thermal efficiency of the cycle.