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Hot air flows with a mass flow rate of 0.05 kg/s through an insulated square duct...

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Mechanical Engineering

Hot air flows with a mass flow rate of 0.05 kg/s through aninsulated square duct with side of 0.15m, the hot air enters at 103oC and after a distance of 5m, cools to 85oC. The heat transfer coefficient between the duct outersurface and the ambient air (Tair = 0 oC) is6 W/m2 K.

Calculate the heat transfer coefficient between hot air and ductinner wall.

Air Cp = 1.011 KJ/kg K; air k = 0.0306 W/m K, air viscosity =211.7*10 -7 Ns/m2; air Pr = 0.698

Answer & Explanation Solved by verified expert
4.3 Ratings (531 Votes)
Crosssection area A 0152 00225 m2Perimeter P 4015 06 mHydraulic    See Answer
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