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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
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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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
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
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