A rectangular duct shown in the figure is carrying hot air at temperature of 50 °C and is subjected to a 10 °C quiescent air environment from its outer surface. The duct material is thin and is highly conductive. The duct is placed in between a low conductive material from the sides and heat loss occurs only from top and bottom surfaces. What is the heat loss to the quiescent air for a unit length of the duct? Approximate the characteristic length as half of the duct wide. Take physical properties of air as k = 0.025 W/mK, v = 15x10-6 m²/s, a = 23x10-6 m²/s.

A rectangular duct shown in the figure is carrying hot air at temperature of 50 °C and is subjected to a 10 °C quiescent air environment from its outer surface. The duct material is thin and is highly conductive. The duct is placed in between a low conductive material from the sides and heat loss occurs only from top and bottom surfaces. What is the heat loss to the quiescent air for a unit length of the duct? Approximate the characteristic length as half of the duct wide. Take physical properties of air as k = 0.025 W/mK, v = 15x10-6 m²/s, a = 23x10-6 m²/s.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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