Exhaust gases from a manufacturing plant are being discharged through a 10-m tall exhaust stack with outer diameter of 1 m, wall thickness of 0.2 m, and thermal conductivity of 40 W/mK. The exhaust gases are discharged at a rate of 1.2 kg/s while temperature drop between inlet and exit of the exhaust stack is 30°C, and the constant pressure specific heat of the exhaust gases is 1600 J/kg-K. On a particular day, the outer surface of the exhaust stack experiences radiation with the surrounding at 27°C, and convection with the ambient air at 27°C also, with an average convection heat transfer coefficient of 8 W/m2K. Solar radiation is incident on the exhaust stack outer surface at a rate of 150 W/m2, and both the emissivity and solar absorptivity of the outer surface are 0.9. Exhaust stack wall k-40 W/mK And Exhaust gases 9-8-09 Air, 27°C Exhaust A-8 W/m²K stack Tu-T-30°C Manufacturing plant DO K Determine the inner surface temperature of the exhaust stack (up to 1 decimal place) The inner surface temperature of the exhaust stack=[

Exhaust gases from a manufacturing plant are being discharged through a 10-m tall exhaust stack with outer diameter of 1 m, wall thickness of 0.2 m, and thermal conductivity of 40 W/mK. The exhaust gases are discharged at a rate of 1.2 kg/s while temperature drop between inlet and exit of the exhaust stack is 30°C, and the constant pressure specific heat of the exhaust gases is 1600 J/kg-K. On a particular day, the outer surface of the exhaust stack experiences radiation with the surrounding at 27°C, and convection with the ambient air at 27°C also, with an average convection heat transfer coefficient of 8 W/m2K. Solar radiation is incident on the exhaust stack outer surface at a rate of 150 W/m2, and both the emissivity and solar absorptivity of the outer surface are 0.9. Exhaust stack wall k-40 W/mK And Exhaust gases 9-8-09 Air, 27°C Exhaust A-8 W/m²K stack Tu-T-30°C Manufacturing plant DO K Determine the inner surface temperature of the exhaust stack (up to 1 decimal place) The inner surface temperature of the exhaust stack=[

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

Exhaust gases from a manufacturing plant are being discharged through a 10-m tall exhaust stack with outer diameter of 1
m wall thickness of 0.2 m, and thermal conductivity of 40 W/m-K. The exhaust gases are discharged at a rate of 1.2 kg/s
while temperature drop between inlet and exit of the exhaust stack is 30°C, and the constant pressure specific heat of the
exhaust gases is 1600 J/kg-K. On a particular day, the outer surface of the exhaust stack experiences radiation with the
surrounding at 27°C, and convection with the ambient air at 27°C also, with an average convection heat transfer coefficient
of 8 W/m2K. Solar radiation is incident on the exhaust stack outer surface at a rate of 150 W/m2, and both the emissivity
and solar absorptivity of the outer surface are 0.9.
Exhaust
stack wall
A-40 W/mK
And
m
Exhaust
gases
Exhaust
stack
a, -8=0.9
Air, 27°C
A-8 W/m²K
T-T-30°C
K
Manufacturing
plant
Determine the inner surface temperature of the exhaust stack (up to 1 decimal place).
The inner surface temperature of the exhaust stack =

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