Air at 1 atm and 20°C is to be transported in a 60-m-long circular steel duct at a rate of 5100 L/min. The roughness of the duct is 0.25 mm. If the pressure drop in the pipe is not to exceed 90 Pa, the maximum velocity of the air is (a) 3.99 m/s (b) 4.32 m/s (c) 6.68 m/s (d) 7.32 m/s (e) 8.90 m/s

Air at 1 atm and 20°C is to be transported in a 60-m-long circular steel duct at a rate of 5100 L/min. The roughness of the duct is 0.25 mm. If the pressure drop in the pipe is not to exceed 90 Pa, the maximum velocity of the air is (a) 3.99 m/s (b) 4.32 m/s (c) 6.68 m/s (d) 7.32 m/s (e) 8.90 m/s

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.9P

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