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=[
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.
Chapter8: Natural Convection
Section: Chapter Questions
Problem 8.8P
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