11.4 A steel tube ( k = 50 W/m - K) of inner and outer diameters D;= 20 mm and Do = 26 mm, respectively, is used to transfer heat from hot gases flowing over the tube ( h = 200 W/m2 . K) to cold water flowing through the tube (h, = 8000 W/m² - K). What is the cold-side overall heat transfer coefficient U? To enhance heat transfer, 16 straight fins of rectangular profile are installed longitudinally along the outer surface of the tube. The fins are equally spaced around the circumference of the tube, each having a thickness of 2mm and a length of 15 mm. What is the corresponding overall heat transfer coefficient U ?
11.4 A steel tube ( k = 50 W/m - K) of inner and outer diameters D;= 20 mm and Do = 26 mm, respectively, is used to transfer heat from hot gases flowing over the tube ( h = 200 W/m2 . K) to cold water flowing through the tube (h, = 8000 W/m² - K). What is the cold-side overall heat transfer coefficient U? To enhance heat transfer, 16 straight fins of rectangular profile are installed longitudinally along the outer surface of the tube. The fins are equally spaced around the circumference of the tube, each having a thickness of 2mm and a length of 15 mm. What is the corresponding overall heat transfer coefficient U ?
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Transcribed Image Text:11.4 A steel tube (k = 50 W/m · K) of inner and outer diameters D; = 20 mm and D, = 26 mm, respectively, is used to transfer heat from hot gases flowing over the tube ( hh =
200 W/m2 . K) to cold water flowing through the tube (he = 800o W/m2 . K). What is the cold-side overall heat transfer coefficient U? To enhance heat transfer, 16 straight fins
of rectangular profile are installed longitudinally along the outer surface of the tube. The fins are equally spaced around the circumference of the tube, each having a thickness of
2mm and a length of 15 mm. What is the corresponding overall heat transfer coefficient U ?
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