An evaporator is used to concentrate 4550 kg/h of a 30% solution of NaOH in water entering at 80°C to a product of 50% solids. The pressure of the saturated steam used is 180 kPa and the pressure in thevapor space of the evaporator is 11.98 Da. The ovarell hest - transfer coefficient is 1568 W/m2 K..Calculate the steam used, the steam economy in kg vaporized/kg steam used, and the heating surfacearea in m?

An evaporator is used to concentrate 4550 kg/h of a 30% solution of Na

1.	An evaporator is used to concentrate 4550 kg/h of a 30% solution of NaOH in water entering at 80°C to a product of 50% solids. The pressure of the saturated steam used is 180 kPa and the pressure in thevapor space of the evaporator is 11.98 Da. The ovarell hest - transfer coefficient is 1568 W/m2 K..Calculate the steam used, the steam economy in kg vaporized/kg steam used, and the heating surfacearea in m?
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