A thin disk-shaped wafer (diameter-=30cm) is maintained at T=100oC. The wafer loses heat to the room by convection and radiation from its upper surface while heat is supplied constantly from below. Assuming the surrounding air at 20oC and all surrounding surfaces (isothermal/blackbodies) at T=15oC. How much heat (in W) must be supplied to the wafer? h wafer-air= 30W/m2K Emissivity of wafer’s surface(gray body)=0.85
A thin disk-shaped wafer (diameter-=30cm) is maintained at T=100oC. The wafer loses heat to the room by convection and radiation from its upper surface while heat is supplied constantly from below. Assuming the surrounding air at 20oC and all surrounding surfaces (isothermal/blackbodies) at T=15oC. How much heat (in W) must be supplied to the wafer? h wafer-air= 30W/m2K Emissivity of wafer’s surface(gray body)=0.85
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 8.44P
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•A thin disk-shaped wafer (diameter-=30cm) is maintained at T=100oC. The wafer loses heat to the room by convection and radiation from its upper surface while heat is supplied constantly from below. Assuming the surrounding air at 20oC and all surrounding surfaces (isothermal/blackbodies) at T=15oC.
How much heat (in W) must be supplied to the wafer?
h wafer-air= 30W/m2K
Emissivity of wafer’s surface(gray body)=0.85
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