Water available at 24 C is heated by a heating element having 30 mm outside diameter and 0.4 m length. The heating element is dipped in water. Surface temperature of heating element is 80 C. Calculate: ( | ) The average value of heat transfer coefficient over the entire length of the heating element. ( || ) Total heat transferred to water by the heating element. Physical properties of water at average temperature are: r = 988 Kg / m3; p = 0.55 *10-3 N- S/mz; Cp = 4180 J/ Kg c; K = 0.64 W/ m c. Ans: Gr: 3.823*1O1 1; h: 1762 W/mZC; Q: 3720w
Water available at 24 C is heated by a heating element having 30 mm outside diameter and 0.4 m length. The heating element is dipped in water. Surface temperature of heating element is 80 C. Calculate: ( | ) The average value of heat transfer coefficient over the entire length of the heating element. ( || ) Total heat transferred to water by the heating element. Physical properties of water at average temperature are: r = 988 Kg / m3; p = 0.55 *10-3 N- S/mz; Cp = 4180 J/ Kg c; K = 0.64 W/ m c. Ans: Gr: 3.823*1O1 1; h: 1762 W/mZC; Q: 3720w
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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Water available at 24 C is heated by a heating element having 30 mm outside diameter
and 0.4 m length. The heating element is dipped in water. Surface temperature of
heating element is 80 C. Calculate: ( | ) The average value of heat transfer coefficient over
the entire length of the heating element. ( || ) Total heat transferred to water by the
heating element. Physical properties of water at average temperature are: r = 988 Kg /
m3; p = 0.55 *10-3 N- S/mz; Cp = 4180 J/ Kg c; K = 0.64 W/ m c.
Ans: Gr: 3.823*1O1 1; h: 1762 W/mZC; Q: 3720w
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