Question
A forward feed double-effect evaporator is required to concentrate an orange juice mixture from 11% to 60 % using steam at 195 kPa. The feed
A forward feed double-effect evaporator is required to concentrate an orange juice mixture from 11% to 60 % using steam at 195 kPa. The feed enters at 1 350 kg/hr at 302 K and the first effect is operated at 80 kPa. Additional information:
Cp is taken to be 4.18 kJ/kg.K
Boiling point rise can be neglected
V1=V2
The overall heat transfer coefficients are as follows:
First effect= 2.8 kW/m2.K Second effect= 2.8 kW/m2.K
2.1. Draw a diagram of this process, showing all streams and define the applicable operating conditions for each effect.
2.2. Calculate the required steam consumption.
2.3. Calculate the steam economy.
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