In a three-effect evaporator system, pure water is produced by parallel feeding. Saturated water vapor at 152C is used as the heating medium. Total feed is 1000 kg/hr at 20C. The temperatures in the separator sections of the evaporators are 134C, 117C and 100C, respectively. The overall heat transfer coefficient of the first effect is U= 2350 kcal/hr.m. is C. Considering the heat conduction areas of the evaporators equal and ignoring the effect of impurities in the feed water on the mass balance;

a) Feed current and heating medium flow rates that must be fed to each effect,

b) The capacity of each effect and the economy of each effect,

C) Calculate all the heat conduction coefficients (U2, U3) of the 2nd and 3rd effects.