5. Evaporation of Sugar Solution in Double-Effect Evaporator. A double-effect evap- orator with reverse feed is used to concentrate 4536 kg/h of a 10 wt % sugar solution to 50%. The feed enters the second effect at 37.8°C. Saturated steam at 115.6°C en- ters the first effect and the vapor from this effect is used to heat the second effect. The absolute pressure in the second effect is 13.65 kPa abs. The overall coefficients are U = 2270 and U, = 1705 W/m2. K. The heating areas for both effects are equal. Use boiling-point-rise and heat-capacity data from Example 8.5-1. Calculate the area and steam consumption. |3|
5. Evaporation of Sugar Solution in Double-Effect Evaporator. A double-effect evap- orator with reverse feed is used to concentrate 4536 kg/h of a 10 wt % sugar solution to 50%. The feed enters the second effect at 37.8°C. Saturated steam at 115.6°C en- ters the first effect and the vapor from this effect is used to heat the second effect. The absolute pressure in the second effect is 13.65 kPa abs. The overall coefficients are U = 2270 and U, = 1705 W/m2. K. The heating areas for both effects are equal. Use boiling-point-rise and heat-capacity data from Example 8.5-1. Calculate the area and steam consumption. |3|
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
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:* 8.5-6. Evaporation of Sugar Solution in Double-Effect Evaporator. A double-effect evap-
orator with reverse feed is used to concentrate 4536 kg/h of a 10 wt % sugar solution
to 50%. The feed enters the second effect at 37.8°C. Saturated steam at 115.6°C en-
ters the first effect and the vapor from this effect is used to heat the second effect. The
absolute pressure in the second effect is 13.65 kPa abs. The overall coefficients are
U = 2270 and Uz
boiling-point-rise and heat-capacity data from Example 8.5-1. Calculate the area and
steam consumption.
1705 W/m. K. The heating areas for both effects are equal. Use
%3D
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