Repeat Problem, but the cycle may contain up to two reheaters, up to three open feedwater heaters, and up to four closed feedwater heaters. If the pressure of the closed feedwater heater is above 100 kPa, the drains should be cascaded backward; otherwise the drains should be pumped forward. Attempt to design a system with the highest possible efficiency.
Problem
A basic Rankine cycle is to produce 200 MW of power. The inlet steam pressure can be no higher than 15 MPa, and the outside environment is 15°C. The isentropic efficiency of the turbine is 0.80, and the isentropic efficiency of the pump is 0.75. Design a basic cycle, specifying state properties at each state, the required mass flow rate of the steam, the thermal efficiency of the cycle, and the required mass flow rate of either cooling water or air in the condenser.
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