Air at 110C enters an 18-cm-diameter and 9-m-long duct at a velocity of 3 m/s. The duct

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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

(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, c_p = 1009 J/kg · K.)

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Heat And Mass Transfer Fundamentals And Applications

ISBN: 9780073398181

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Authors: Yunus Cengel, Afshin Ghajar

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Question Posted: Sep 15, 2023 09:23 AM

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Air at 110C enters an 18-cm-diameter and 9-m-long duct at a velocity of 3 m/s. The duct

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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

Heat And Mass Transfer Fundamentals And Applications

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