Air (c p = 1000 J/kg K) enters a 20-cm-diameter and 19-m-long underwater duct at 50C
Question:
Air (cp = 1000 J/kg · K) enters a 20-cm-diameter and 19-m-long underwater duct at 50°C and 1 atm at an average velocity of 7 m/s and is cooled by the water outside. If the average heat transfer coefficient is 35 W/m2 · K and the tube temperature is nearly equal to the water temperature of 5°C, the exit temperature of air is
(a) 88C
(b) 138C
(c) 188C
(d) 288C
(e) 378C
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Step by Step Answer:
To find the exit temperature of air in the underwater duct we can use the principle of energy conser...View the full answer
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Related Book For 
Heat And Mass Transfer Fundamentals And Applications
ISBN: 9780073398181
5th Edition
Authors: Yunus Cengel, Afshin Ghajar
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