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14.10. A liquor containing 15 per cent solids is concentrated to 55 per cent solids in a double-effect evaporator. operating at a pressure in the second effect of 18 kN/m². No crystals are formed. The flowrate of feed is 2.5 kg/ s at 375 K with a specific heat capacity of 3.75 kJ/kg K. The boiling-point rise of the concentrated liquor is 6 deg K and the steam fed to the first effect is at 240 kN/ m². The overall heat transfer coefficients in the first and second effects are 1.8 and 0.63 kW/m²K. respectively. If the heat transfer area is to be the same in each effect, what areas should be specified?

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14.10. A liquor containing 15 per cent solids is concentrated to 55 per cent solids in a double-effect evaporator. operating at a pressure in the second effect of 18 kN/m². No crystals are formed. The flowrate of feed is 2.5 kg/ s at 375 K with a specific heat capacity of 3.75 kJ/kg K. The boiling-point rise of the concentrated liquor is 6 deg K and the steam fed to the first effect is at 240 kN/ m². The overall heat transfer coefficients in the first and second effects are 1.8 and 0.63 kW/m²K. respectively. If the heat transfer area is to be the same in each effect, what areas should be specified?

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