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Nitrogen at 1 atm and 100 °C enters into an equilateral triangular cross section duct of each side 25 cm long with an average velocity of 10 m/s. The duct wall is maintained at a constant surface temperature of 800 °C and the outlet mean temperature is 300 °C. a) What is the bulk mean temperature Tm and Reynolds number Re? b) What is the convection heat transfer coefficient h? c) Assuming smooth tube, estimate the length L of the duct and the pumping power required.

Nitrogen at 1 atm and 100 °C enters into an equilateral triangular cross section duct of each side 25 cm long with an average velocity of 10 m/s. The duct wall is maintained at a constant surface temperature of 800 °C and the outlet mean temperature is 300 °C. a) What is the bulk mean temperature Tm and Reynolds number Re? b) What is the convection heat transfer coefficient h? c) Assuming smooth tube, estimate the length L of the duct and the pumping power required.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Nitrogen at 1 atm and 100 °C enters into an equilateral triangular cross section duct of each side 25 cm long with an average velocity of 10 m/s. The duct wall is maintained at a constant surface temperature of 800 °C and the outlet mean temperature is 300 °C. a) What is the bulk mean temperature Tm and Reynolds number Re? b) What is the convection heat transfer coefficient h? c) Assuming smooth tube, estimate the length L of the duct and the pumping power required.
Transcribed Image Text:Nitrogen at 1 atm and 100 °C enters into an equilateral triangular cross section duct of each side 25 cm long with an average velocity of 10 m/s. The duct wall is maintained at a constant surface temperature of 800 °C and the outlet mean temperature is 300 °C. a) What is the bulk mean temperature Tm and Reynolds number Re? b) What is the convection heat transfer coefficient h? c) Assuming smooth tube, estimate the length L of the duct and the pumping power required.
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