The temperature distribution across a wall 0.25 m thick at a certain instant of time is T(x) = a + bx+cx², where T is in degrees Celsius and x is in meters, a = 200 C, b = -200 C/m, and c = 30 C/m². The wall has a thermal conductivity of 2.5 W/m.K. (a) Determine the heat flux into and out of the wall (q"in and q'out). (b) If the cold surface is exposed to a fluid at 100 C, what is the convection coefficient h? C- Degree Celsius 200°C h= q" In Choose.... q'out= Choose... Choose... box K = 2.5 w/m.k T(x)-200-200 x +30x² q" Out 142.7 C 11 =0.25 m Fluid Too = 100°C h

The temperature distribution across a wall 0.25 m thick at a certain instant of time is T(x) = a + bx+cx², where T is in degrees Celsius and x is in meters, a = 200 C, b = -200 C/m, and c = 30 C/m². The wall has a thermal conductivity of 2.5 W/m.K. (a) Determine the heat flux into and out of the wall (q"in and q'out). (b) If the cold surface is exposed to a fluid at 100 C, what is the convection coefficient h? C- Degree Celsius 200°C h= q" In Choose.... q'out= Choose... Choose... box K = 2.5 w/m.k T(x)-200-200 x +30x² q" Out 142.7 C 11 =0.25 m Fluid Too = 100°C h

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.48P

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