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This is problem 6-9 from El-Wakil’s Powerplant Technology book -- consider for simplicity an ideal Rankine...

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Mechanical Engineering

This is problem 6-9 from El-Wakil’s Powerplant Technology book-- consider for simplicity an ideal Rankine cycle with turbineinlet and exit steam at 2500 psia and 1000°F, and 1 psia,respectively, and no feedwater heating. The steam mass flow rate is2x106 lbm/h. The plant has two-pass surfacecondenser with 45-ft-long 7/8-in 18-BWG-type 304 stainless steeltubes. Cooling water enters the tubes at 70°F and 7 ft/s. With noflows into the condenser other than turbine steam, find (a) theplant power, in megawatts, and efficiency and (b) the total numberof tubes if the condenser terminal temperature difference is8°F.

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