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4. A single-effect evaporator is used to concentrate 1500lb/hr of 10%NaOH solution with the feed temperature 150F. The temperature and mass flow rate of the

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4. A single-effect evaporator is used to concentrate 1500lb/hr of 10%NaOH solution with the feed temperature 150F. The temperature and mass flow rate of the saturated steam is 300F and 1000 lb/hr, respectively. The vapor pressure inside the evaporator is 2psia and the specific heat of the vapor is 0.45Btu/(lb.F). The overall heat transfer coefficient is 30Btu/(ft2.hr.F). Find: a. what is the concentration of the concentrated NaOH solution? (9) b, what is the heat transfer area? (2) c. the economy (2) d. the capacity (2) (Trial and error is required)

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