Question
Air at atmospheric pressure and 20 degree Celsius flows with 6 m/s velocity through main trunck duct of air conditioning system. The duct is rectangular in cross-section and measures 40 cm by 80 cm. Determine heat loss per meter length of duct corresponding to unit temperature difference. The relevant thermos-physical properties of air are
v = 15 * 10¯⁶ m²/s
α = 7.7 * 10¯² m²/hr
k = 0.026 W/m degree
v = 15 * 10¯⁶ m²/s
α = 7.7 * 10¯² m²/hr
k = 0.026 W/m degree
Answer: Option B
Answer: (b).42.768 W
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Answer: (b).42.768 W
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