Consider a pass-out cogeneration power plant in Aramco Company that is modified with reheat and that produces 3 MW of power and supplies 7 MW of process heat. Steam enters the high-pressure turbine at 8 MPa and 500 °C and expands to ideal pressure. At this pressure, part of the steam is extracted from the turbine and routed to the process heater, while the remainder is reheated to ideal temperature and expanded in the low-pressure turbine to the condenser pressure of 15 kPa. The condensate from the condenser is pumped and is mixed with the extracted steam, which leaves the process heater as a compressed liquid (subcooled) at 120 °C. The mixture is then pumped to the boiler pressure. Assuming the turbine to be isentropic, show the cycle and 7-s diagram with respect to saturation line, determine (a) the rate of heat input in the boiler, (b) the fraction of steam extracted for process heating and (c) mass flow rate of steam in boiler and turbines, and cycle efficiency. Boiler High-P turbine Low-P turbine 3 MW Process heater 7 MW 1-0 Condenser Pump II Mixing chamber Pump I