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Fuel oil is to be cooled in a double-pipe heat exchanger of length 2 m made of stainless steel that has a conductivity of 15 W/m K. The inner tube has inner diameter 1.2 cm and outer diameter 1.8 cm. The convection heat transfer coefficient on the inner surface of the tube is 850 W/m² K and 1250 W/m² K on the outer surface. Consider a fouling factor of 0.0004 m² K/W on the inner surface and 0.0001 m² K/W on the outer surface. Estimate the (i) Total thermal resistance. (ii) Overall heat transfer coefficient based on the inner area (iii) Overall heat transfer coefficient based on the outer area.

Fuel oil is to be cooled in a double-pipe heat exchanger of length 2 m made of stainless steel that has a conductivity of 15 W/m K. The inner tube has inner diameter 1.2 cm and outer diameter 1.8 cm. The convection heat transfer coefficient on the inner surface of the tube is 850 W/m² K and 1250 W/m² K on the outer surface. Consider a fouling factor of 0.0004 m² K/W on the inner surface and 0.0001 m² K/W on the outer surface. Estimate the (i) Total thermal resistance. (ii) Overall heat transfer coefficient based on the inner area (iii) Overall heat transfer coefficient based on the outer area.

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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Fuel oil is to be cooled in a double-pipe heat exchanger of length 2 m made of stainless steel that has a conductivity of 15 W/m K. The inner tube has inner diameter 1.2 cm and outer diameter 1.8 cm. The convection heat transfer coefficient on the inner surface of the tube is 850 W/m? K and 1250 W/m² K on the outer surface. Consider a fouling factor of 0.0004 m² K/W on the inner surface and 0.0001 m² K/W on the outer surface. Estimate the (i) Total thermal resistance. (ii) Overall heat transfer coefficient based on the inner area (iii) Overall heat transfer coefficient based on the outer area.
Transcribed Image Text:Fuel oil is to be cooled in a double-pipe heat exchanger of length 2 m made of stainless steel that has a conductivity of 15 W/m K. The inner tube has inner diameter 1.2 cm and outer diameter 1.8 cm. The convection heat transfer coefficient on the inner surface of the tube is 850 W/m? K and 1250 W/m² K on the outer surface. Consider a fouling factor of 0.0004 m² K/W on the inner surface and 0.0001 m² K/W on the outer surface. Estimate the (i) Total thermal resistance. (ii) Overall heat transfer coefficient based on the inner area (iii) Overall heat transfer coefficient based on the outer area.
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