Calculate the steam consumption and steam savings in a single-acting evaporator at 25C and a feed rate of 2 kg/s, the saturation pressure in the evaporator is 31.19 kPa, saturated steam is used at a pressure of 143.27 kPa as a heating medium, The condensate leaves at the condensation temperature of the steam, the heat capacity of the juice is 3.9 kJ/kgC and 3.7 kJ/kgC at the inlet and outlet of the evaporator, respectively, and the solids content is 10% and 20% at the evaporator inlet and outlet, respectively.