Air at 110C enters an 18-cm-diameter and 9-m-long duct at a velocity of 3 m/s. The duct
Question:
Air at 110°C enters an 18-cm-diameter and 9-m-long duct at a velocity of 3 m/s. The duct is observed to be nearly isothermal at 85°C. The rate of heat loss from the air in the duct is
(a) 375 W
(b) 510 W
(c) 936 W
(d) 965 W
(e) 987 W
(For air, use k = 0.03095 W/m · K, Pr = 0.7111, v = 2.306 × 10-5 m2/s, cp = 1009 J/kg · K.)
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The rate of heat loss from the air in the duct can be calculated using the following equation Q h A ...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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