A small droplet of liquid detergent, falling through air in a spray drying tower, has its diameter reduced as water evaporates from the surface. If we assume that the temperature of the liquid within the drop remains at 290 K and the dry air is at 310 K, determine the moisture composition of the drying medium. The following properties are available at the average temperature of the air, 300 K: kinematic viscosity of air ¼ 1:5689 10^-5 m2/s thermal diffusivity of air ¼ 2:2156 10^-5m2/s mass diffusivity of water in air ¼ 2:63 10^-5 m2/s density of air ¼ 1:177 kg/m3 thermal conductivity of air ¼ 2:624 10^-2 J/m s K heat capacity of air ¼ 1006 J/g K surface temperature of drop; Ts ¼ 290 K latent heat of vaporization at Ts ¼ 2461 J/g vapor pressure of water at Ts ¼ 1:94 10^3 Pa
A small droplet of liquid detergent, falling through air in a spray drying tower, has its diameter reduced as water evaporates from the surface. If we assume that the temperature of the liquid within the drop remains at 290 K and the dry air is at 310 K, determine the moisture composition of the drying medium. The following properties are available at the average temperature of the air, 300 K: kinematic viscosity of air ¼ 1:5689 10^-5 m2/s thermal diffusivity of air ¼ 2:2156 10^-5m2/s mass diffusivity of water in air ¼ 2:63 10^-5 m2/s density of air ¼ 1:177 kg/m3 thermal conductivity of air ¼ 2:624 10^-2 J/m s K heat capacity of air ¼ 1006 J/g K surface temperature of drop; Ts ¼ 290 K latent heat of vaporization at Ts ¼ 2461 J/g vapor pressure of water at Ts ¼ 1:94 10^3 Pa
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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A small droplet of liquid detergent, falling through air in a spray drying tower, has its diameter reduced as water evaporates from the surface. If we assume that the temperature of the liquid within the drop remains at 290 K and the dry air is at 310 K, determine the moisture composition of the drying medium. The following properties are available at the average temperature of the air, 300 K:
kinematic viscosity of air ¼ 1:5689 10^-5 m2/s
thermal diffusivity of air ¼ 2:2156 10^-5m2/s
mass diffusivity of water in air ¼ 2:63 10^-5 m2/s
density of air ¼ 1:177 kg/m3
thermal conductivity of air ¼ 2:624 10^-2 J/m s K
heat capacity of air ¼ 1006 J/g K
surface temperature of drop; Ts ¼ 290 K
latent heat of vaporization at Ts ¼ 2461 J/g
vapor pressure of water at Ts ¼ 1:94 10^3 Pa
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