Question: QUESTION 2 A forward feed double-effect evaporator is required to concentrate an orange juice mixture from 11% to 60% using steam at 195kPa. The feed

QUESTION 2 A forward feed double-effect evaporator is required to concentrate

QUESTION 2 A forward feed double-effect evaporator is required to concentrate an orange juice mixture from 11% to 60% using steam at 195kPa. The feed enters at 1350kg/hr at 302K and the first effect is operated at 80kPa. Additional information: - Cp is taken to be 4.18kJ/kg.K - Boiling point rise can be neglected - V1=V2 - The overall heat transfer coefficients are as follows: First effect =2.8kW/m2K Second effect =2.8kW/m2K 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. (3) QUESTION 2 A forward feed double-effect evaporator is required to concentrate an orange juice mixture from 11% to 60% using steam at 195kPa. The feed enters at 1350kg/hr at 302K and the first effect is operated at 80kPa. Additional information: - Cp is taken to be 4.18kJ/kg.K - Boiling point rise can be neglected - V1=V2 - The overall heat transfer coefficients are as follows: First effect =2.8kW/m2K Second effect =2.8kW/m2K 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. (3)

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