An engine cylinder of height H = 0.15 m and outside diameter D = 50 mm. Under typical operating conditions the outer surface of the cylinder is at a temperature of 500 K and is exposed to ambient air at 300 K, with a convection coefficient of 50 W/m2. K. Annular fins of a rectangular profile are integrally cast with the cylinder to increase heat transfer to the surroundings. Consider five such fins, which are of thicknesst = 6 mm, length L 20 mm, and equally spaced. What is the increase in heat transfer due to use of the fins? And the overall effectiveness? Take K=186 W/m.°C. %3D
An engine cylinder of height H = 0.15 m and outside diameter D = 50 mm. Under typical operating conditions the outer surface of the cylinder is at a temperature of 500 K and is exposed to ambient air at 300 K, with a convection coefficient of 50 W/m2. K. Annular fins of a rectangular profile are integrally cast with the cylinder to increase heat transfer to the surroundings. Consider five such fins, which are of thicknesst = 6 mm, length L 20 mm, and equally spaced. What is the increase in heat transfer due to use of the fins? And the overall effectiveness? Take K=186 W/m.°C. %3D
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:(7) An engine cylinder of height H = 0.15 m and outside diameter D = 50 mm. Under typical
operating conditions the outer surface of the cylinder is at a temperature of 500 K and is
exposed to ambient air at 300 K, with a convection coefficient of 50 W/m2. K. Annular fins
of a rectangular profile are integrally cast with the cylinder to increase heat transfer to the
surroundings. Consider five such fins, which are of thickness t 6 mm, length L = 20 mm,
and equally spaced. What is the increase in heat transfer due to use of the fins? And the
overall effectiveness? Take K=186 W/m.°C.
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