A single effect evaporatoris being used to concentrate 8000 kg/h of tomato juice from 5% total solids to 30% total solids. The juice enters the evaporator at 25°C. The evaporator is operated with steam (80% quality) at 143.27 kPa. The vacuum inside the evaporator allows the juice to boil at 80 ° C. The specific heat of the liquid feed is 4.1 kJ/(kg°C) and the concentrated product is 3.1 kJ/(kg°C). Calculate (a) the steam requirements = Answer kg / hour. (b) steam economy for the process. Assume the condensate is discharged at 75°C. = Answer (kg of water evaporates / kg of steam

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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A single effect evaporatoris being used to concentrate 8000 kg/h of tomato juice from 5% total solids to 30% total solids. The juice enters the evaporator at 25°C. The evaporator is operated with steam (80% quality) at 143.27 kPa. The vacuum inside the evaporator allows the juice to boil at 80 ° C. The specific heat of the liquid feed is 4.1 kJ/(kg°C) and the concentrated product is 3.1 kJ/(kg°C). Calculate
(a) the steam requirements = Answer kg / hour.
(b) steam economy for the process. Assume the condensate is discharged at 75°C. = Answer (kg of water evaporates / kg of steam)

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