Question: PLS STEP BY STEP WTH EXPLANATION A solution containing 20% by weight of NaOH with a temperature of 311 K in a standard type evaporator

PLS STEP BY STEP WTH EXPLANATION

A solution containing 20% by weight of NaOH with a temperature of 311 K in a standard type evaporator is evaporated until its concentration (by weight) reaches 50%. The temperature of the Saturated Water vapor used as the heating medium is 398 K and there is an absolute pressure of 12.3 kPa in the separator part of the evaporator. Since the entire heat transfer coefficient of the system is 1420 watts/mK, the specific heat of the overheated solvent vapor is 1.926 kJ/kg.K and the heat transfer area is 86.4 square meters. a) the flow rate of the supply current? b) Calculate the evaporator efficiency (steam economy).

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