Heat-Transfer Coefficient in Single-Effect Evaporator. A feed of 4535 kg/h of a 2.0 wt % salt solution at 311 K enters continuously a single-effect evaporator and is being concentrated to 3.0%. The evaporation is at atmospheric pressure and the area of the evaporator is 69.7 m². Saturated steam at 383.2 K is supplied for heating. Since the solution is dilute, it can be assumed to have the same boiling point as water. The heat capacity of the feed can be taken as c, = 4.10 kJ/kg · K. Calculate the amounts of vapor and liquid product and the overall heat-transfer coefficient U.

Heat-Transfer Coefficient in Single-Effect Evaporator. A feed of 4535 kg/h of a 2.0 wt % salt solution at 311 K enters continuously a single-effect evaporator and is being concentrated to 3.0%. The evaporation is at atmospheric pressure and the area of the evaporator is 69.7 m². Saturated steam at 383.2 K is supplied for heating. Since the solution is dilute, it can be assumed to have the same boiling point as water. The heat capacity of the feed can be taken as c, = 4.10 kJ/kg · K. Calculate the amounts of vapor and liquid product and the overall heat-transfer coefficient U.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Atomic diffusion in solids

In material science, diffusion can take place in solid, liquid, and gases. In solids, atomic diffusion can take place with the help of thermally activated and randomly vibrating atoms. The atomic diffusion in solids is complex and very slow in comparison to atomic diffusion in liquids and gases because the interatomic distance between the atoms is smaller in solids as compared to liquids and gases.

Question

Heat-Transfer Coefficient in Single-Effect Evaporator. A feed of 4535 kg/h of a
2.0 wt % salt solution at 311 K enters continuously a single-effect evaporator and
is being concentrated to 3.0%. The evaporation is at atmospheric pressure and
the area of the evaporator is 69.7 m². Saturated steam at 383.2 K is supplied for
heating. Since the solution is dilute, it can be assumed to have the same boiling
point as water. The heat capacity of the feed can be taken as cp = 4.10 kJ/kg · K.
Calculate the amounts of vapor and liquid product and the overall heat-transfer
coefficient U.
8.4-1.

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