A vertical, cylindrical tank is filled with water at 65°F. The tank is insulated at the top and bottom but is exposed on its vertical sides to cold 10°F night air. The diameter of the tank is 2 ft and its height is 3 ft. The overall heat transfer coefficient is 20 BTU/hr.ft2.°F. Neglect the resistance of metal wall of the tank and assume that water in the tank is perfectly mixed. (a) Calculate how many minutes it will be until the first crystal of ice is formed. (b) How long will it take to completely freeze the water in the tank? The heat of fusion of water is 144 BTU/lb.
A vertical, cylindrical tank is filled with water at 65°F. The tank is insulated at the top and bottom but is exposed on its vertical sides to cold 10°F night air. The diameter of the tank is 2 ft and its height is 3 ft. The overall heat transfer coefficient is 20 BTU/hr.ft2.°F. Neglect the resistance of metal wall of the tank and assume that water in the tank is perfectly mixed. (a) Calculate how many minutes it will be until the first crystal of ice is formed. (b) How long will it take to completely freeze the water in the tank? The heat of fusion of water is 144 BTU/lb.
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:A vertical, cylindrical tank is filled with water at 65°F. The tank is insulated at the top and
bottom but is exposed on its vertical sides to cold 10°F night air. The diameter of the tank is
2 ft and its height is 3 ft. The overall heat transfer coefficient is 20 BTU/hr.ft2.°F. Neglect
the resistance of metal wall of the tank and assume that water in the tank is perfectly mixed.
(a) Calculate how many minutes it will be until the first crystal of ice is formed.
(b) How long will it take to completely freeze the water in the tank?
The heat of fusion of water is 144 BTU/lb.
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