In an experimental study, peach purée is being concentrated in a continuous vacuum evaporator at a rate of 65 kg/hr. the feed material has a temperature of 15℃ and a total solids content of 10.9%. a product of 40.1% total solids is withdrawn at a temperature of 40℃, and condensate leaves the condenser at 35℃.
a) calculate the flow rate of the product and condensate streams.
b) if steam condensing 120℃ is used to supply the heat of evaporation, calculate the steam consumption in kg/hr. the specific heat of the solid material is 2.09 kj/kg. k.
c) cooling water enters the condenser at 20℃ and leaves at 30℃. calculate the cooling water flow rate.