50 l/hr of fruit juice at 290 K is fed to a falling film evaporator. The juice flows down the outside surface of the evaporation tube 0.1 m diameter and 12 m long. Dry air at 310 K and 1 Atm impinges on the tube at right angles to the liquid flow with a velocity of 5 m/s. The fruit juice initially contains 10% solids and 90% water. I) Draw a diagram for this problem II) State all relevant assumptions to be used in this solution. III) Use the Beddingfield and Drew Analogy (given below) to determine the concentration of the solids as the juice concentrate drops off the end of the evaporation tube. Beddingfield and Drew Analogy Where Sc the Schmidt number is And Gm (Gas molar flow per unit surface area perpendicular to the tube) is Data Diffusivity of water in air 2.63 * 105 m² s¹ Density of Air 1.2 kg/m³ at 310 K -1 Viscosity of air 1.2*10*5 ms¹ at 310 K Vapour pressure of water = 2.33*10³ Pa at 290 K
50 l/hr of fruit juice at 290 K is fed to a falling film evaporator. The juice flows down the outside surface of the evaporation tube 0.1 m diameter and 12 m long. Dry air at 310 K and 1 Atm impinges on the tube at right angles to the liquid flow with a velocity of 5 m/s. The fruit juice initially contains 10% solids and 90% water. I) Draw a diagram for this problem II) State all relevant assumptions to be used in this solution. III) Use the Beddingfield and Drew Analogy (given below) to determine the concentration of the solids as the juice concentrate drops off the end of the evaporation tube. Beddingfield and Drew Analogy Where Sc the Schmidt number is And Gm (Gas molar flow per unit surface area perpendicular to the tube) is Data Diffusivity of water in air 2.63 * 105 m² s¹ Density of Air 1.2 kg/m³ at 310 K -1 Viscosity of air 1.2*10*5 ms¹ at 310 K Vapour pressure of water = 2.33*10³ Pa at 290 K
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
Related questions
Question
Transcribed Image Text:50 I/hr of fruit juice at 290 K is fed to a falling film evaporator. The juice flows down
the outside surface of the evaporation tube 0.1 m diameter and 12 m long. Dry air at
310 K and 1 Atm impinges on the tube at right angles to the liquid flow with a
velocity of 5 m/s. The fruit juice initially contains 10% solids and 90% water.
I) Draw a diagram for this problem
II) State all relevant assumptions to be used in this solution.
III) Use the Beddingfield and Drew Analogy (given below) to determine the
concentration of the solids as the juice concentrate drops off the end of the
evaporation tube.
Beddingfield and Drew Analogy
Where Sc the Schmidt number is
And Gm (Gas molar flow per unit surface area perpendicular to the tube) is
Data
Diffusivity of water in air 2.63 * 10° m² s
Density of Air 1.2 kg/m at 310 K
-5
Viscosity of air 1.2*10° ms" at 310 K
Vapour pressure of water = 2.33*10° Pa at 290 K
%3D
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step 1: Draw the diagram for this problem, list assumptions, determine the outlet concentration of solid.
VIEWStep 2: Draw a diagram for the given problem.
VIEWStep 3: List all the assumptions made.
VIEWStep 4: Calculate the values to be used in Beddingfield and Drew analogy
VIEWStep 5: Calculate the concentration of solid when the juice concentrate drops off at the end.
VIEWSolution
VIEW
Step by step
Solved in 6 steps with 30 images
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The