Question: A solution containing 10% NaOH by weight is in a single effect evaporator with a flow rate of 5000 kg/hr. is concentrated. Atmospheric pressure at

A solution containing 10% NaOH by weight is in a single effect evaporator with a flow rate of 5000 kg/hr.

is concentrated. Atmospheric pressure at the evaporation site is 100.5kPa. supply current to the system

It enters at 355K. The solution showing a boiling point rise (KNY) of 55 K was in the evaporator at 403 K.

is boiling. The saturated steam used as the heating medium is at a gauge pressure of 516.8 kPa. Heating of condensate

The temperature to leave the cabin is 368 K. The entire heat transfer coefficient of the system is given as 2558 W/m2 .K and the specific heat of the overheated solvent vapor is given as 1.926 kJ/kg.K.

a. Calculate the amount of concentrated solution and solvent vapor.

b. Calculate the heating vapor consumption and heat transfer area.

c. How many kPa is the vacuum applied to the system?

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