Solve it all. d- Convection heat transfer coefficient, h =W/m2.Ke- Exit temperature of the fluid, T, =°Cf- Surface temperature of the duct at the exit Tse =°C Cold air at atmospheric pressure and -10°C enters a 260-m long duct of elliptical cross section (a = 2.4-m, b = 0.3-m) that passes through the attic of a factory at a rate of 0.02 m3/s. The duct is equipped with aelectric resistance heater that provides uniform heating throughout the surface of the duct at a rate 900 W. Determine the corresponding values:(for air, use k = 0.032 W/m.K, Pr = 0.7, µ = 2.19 x 10-5 Pa.s, ps = 2.01 x 10-5 Pa.s, cp = 1011 J/kg.K, p = 0.946 kg/m³)aPerimeter TA3(a+ b) – V(3a+ b)(a +36)Area = abn

given Air properties - Pr= 0.7 , k=0.032 W/m K μ= 2 .19 * 10^ - 5 P a - 5 p=0.946 kg/m3 Area (A)…

Answered: on heat transfer coefficient, h = W/m

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on heat transfer coefficient, h = W/m

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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Question

Solve it all.

d- Convection heat transfer coefficient, h =
W/m2.K
e- Exit temperature of the fluid, T, =
°C
f- Surface temperature of the duct at the exit Tse =
°C

Cold air at atmospheric pressure and -10°C enters a 260-m long duct of elliptical cross section (a = 2.4-m, b = 0.3-m) that passes through the attic of a factory at a rate of 0.02 m3/s. The duct is equipped with a
electric resistance heater that provides uniform heating throughout the surface of the duct at a rate 900 W. Determine the corresponding values:
(for air, use k = 0.032 W/m.K, Pr = 0.7, µ = 2.19 x 10-5 Pa.s, ps = 2.01 x 10-5 Pa.s, cp = 1011 J/kg.K, p = 0.946 kg/m³)
a
Perimeter TA
3(a+ b) – V(3a+ b)(a +36)
Area = abn

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