- T 10 C Air Dict 15 Cm X 20 Cm Q 2 Air Enters A 7 M Long Section Of A Rectangular Duct Of Cross Section 15 Cm X 20 Cm 1 (24.99 KiB) Viewed 111 times
T. -10°C Air dict 15 cm x 20 cm Q#2: Air enters a 7-m-long section of a rectangular duct of cross section 15 cm x 20 cm
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T. -10°C Air dict 15 cm x 20 cm Q#2: Air enters a 7-m-long section of a rectangular duct of cross section 15 cm x 20 cm
T. -10°C Air dict 15 cm x 20 cm Q#2: Air enters a 7-m-long section of a rectangular duct of cross section 15 cm x 20 cm at 50°C at an average velocity of 7 m/s. If the walls of the duct are maintained at 10°C, determine (a) the outlet temperature of the air, (b) the rate of heat transfer from the air, and (c) the fan power needed to overcome the pressure losses in this section of the duct. (p=1.127 kg/m, Cp=1007 J/kg. k=0.02662 W/m. C, v= 1.702x10m/s, Pr=0.7255) Final Answers: (a) 32.8°C, (b) 3674 W, (e) 4.2 W I=7m All SO' 7 ms