Air at 25C flows over a 5-cm-diameter, 1.7-m-long pipe with a velocity of 4 m/s. A refrigerant
Question:
Air at 25°C flows over a 5-cm-diameter, 1.7-m-long pipe with a velocity of 4 m/s. A refrigerant at -15°C flows inside the pipe and the surface temperature of the pipe is essentially the same as the refrigerant temperature inside. Air properties at the average temperature are k = 0.0240 W/m · K, Pr = 0.735, v = 1.382 × 10-5 m2/s. The rate of heat transfer to the pipe is
(a) 343 W
(b) 419 W
(c) 485 W
(d) 547 W
(e) 610 W
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The answer is c 485 W To solve this problem we can use the following equation to calculate the rate ...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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