2. A triple-effect evaporator with forward feed is evaporating a sugar solution with negligible boiling-point rise and containing 10 wt % solids to 35% solids. Saturated steam at 205 kPa abs is being...

Extracted text: 2. A triple-effect evaporator with forward feed is evaporating a sugar solution with negligible boiling-point rise and containing 10 wt % solids to 35% solids. Saturated steam at 205 kPa abs is being used. The pressure in the vapor space of the third effect is 13.65 kPa. The feed rate is 25,000 kg/hr and the temperature 300 K. The liquid heat сараcity is The heat-transfer coefficients are U1 = 3,123, U2 = 1,987, and U3 = 1,136 W/m2.K. Cp= 4.19 - 2.35 x, where cp is in kJ/kg:K and x in weight fraction solids. Calculate a. the surface area of each effect if each effect has the same area, b. the steam economy.