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This is problem 6-19 from El-Wakil’s Powerplant Technology book -- a 35,000 lbm/h double-effect evaporator receives motive...

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Mechanical Engineering

This is problem 6-19 from El-Wakil’s Powerplant Technology book-- a 35,000 lbm/h double-effect evaporator receivesmotive steam at 40 psia and 300°F. Pretreated raw water enters at60°F. The pressure in the second effect is 5 psia. Calculate, forequal heat heads, (a) the amount of motive steam required, in poundmass per hour, and (b) the surface areas for each evaporator, insquare feet.

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