Design a Rankine cycle with two closed feedwater heaters so that the cycle has a high thermal efficiency. The maximum pressure in the cycle is 3000 psia and the maximum temperature is 1150°F. The condenser pressure is 3 psia. The drains from the feedwater heaters can be either pumped forward or cascaded backward. The isentropic efficiency of the turbine is 0.77, and the isentropic efficiency of the pumps is 0.65. The net power to be produced by the cycle is 600 MW.
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