Air at 3 x 10 kg/s and 27°C enters a rectangular duct that is 1 m long and 4 mm x 16 mm on a side. A uniform heat flux of 600 W/m² is imposed on the duct surface. What is the temperature of the air and of the duct surface at the outlet?

Air at 3 x 10 kg/s and 27°C enters a rectangular duct that is 1 m long and 4 mm x 16 mm on a side. A uniform heat flux of 600 W/m² is imposed on the duct surface. What is the temperature of the air and of the duct surface at the outlet?

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 7.31P

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Noncircular Ducts
8.80 Air at 3× 10-4 kg/s and 27°C enters a rectangular duct
that is 1 m long and 4 mm x 16 mm on a side. A uniform
heat flux of 600 W/m² is imposed on the duct surface.
What is the temperature of the air and of the duct surface
at the outlet?

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