Dry air enters an inclined pipeline in the upward direction being an inner diameter of 0.3 m and a total length of 5 m with a 30° inclination from the horizontal direction. The air enters at 300 kPa (absolute) with a velocity at 3 m/s, density of 3 kg/m³, and at an ambient temperature of 20°C. The electrical heaters around the pipe surface provides a uniform heating flux of 2 kW/m² and the exiting pressure was measured to be 150 kPa. Assume ideal gas behavior, and the air specific heat can be approximated as Cn 900+ 0.37 (where T is in Kelvin).

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
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ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
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Chapter6: Forced Convection Over Exterior Surfaces
Section: Chapter Questions
Problem 6.1P: 6.1 Determine the heat transfer coefficient at the stagnation point and the average value of the...
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Dry air enters an inclined pipeline in the upward direction being preheated. The pipe has
an inner diameter of 0.3 m and a total length of 5 m with a 30° inclination from the
horizontal direction. The air enters at 300 kPa (absolute) with a velocity at 3 m/s, density
of 3 kg/m³, and at an ambient temperature of 20°C. The electrical heaters around the pipe
surface provides a uniform heating flux of 2 kW/m² and the exiting pressure was
measured to be 150 kPa. Assume ideal gas behavior, and the air specific heat can be
approximated as
Cp
= 900+ 0.37 (where T is in Kelvin).
Please calculate the exiting temperature of the air.
You may need the following formula:
The formula for the roots of a general quadratic equation ax² + bx+c = 0 is
-b ± √b²-4ac
2a
7293k
Transcribed Image Text:Dry air enters an inclined pipeline in the upward direction being preheated. The pipe has an inner diameter of 0.3 m and a total length of 5 m with a 30° inclination from the horizontal direction. The air enters at 300 kPa (absolute) with a velocity at 3 m/s, density of 3 kg/m³, and at an ambient temperature of 20°C. The electrical heaters around the pipe surface provides a uniform heating flux of 2 kW/m² and the exiting pressure was measured to be 150 kPa. Assume ideal gas behavior, and the air specific heat can be approximated as Cp = 900+ 0.37 (where T is in Kelvin). Please calculate the exiting temperature of the air. You may need the following formula: The formula for the roots of a general quadratic equation ax² + bx+c = 0 is -b ± √b²-4ac 2a 7293k
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