all of a drying oven is construc ctivity k = 0.0705 W/m-K betw ature, T₁= 450°C, and the com
all of a drying oven is construc ctivity k = 0.0705 W/m-K betw ature, T₁= 450°C, and the com
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 8.33P
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![QUESTION 1
arad
The wall of a drying oven is constructed by sandwiching an insulation material of thermal
conductivity k = 0.0705 W/m-K between thin metal sheets. The oven air is at the
temperature, T₁ = 450°C, and the corresponding convection coefficient is h₁ = 20 W/m²K.
The inner wall surface absorbs a radiant flux of = 140 W/m² from hotter objects within
the oven. The room air is at the temperature, To = 21°C, and the overall coefficient for
convection and radiation from the outer surface is ho = 12 W/m²K. What insulation
thickness, L, is required to maintain the outer wall surface temperature at Twall = 72°C?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc4dc380c-a82f-4308-8d95-1a09bead5fa9%2Fd607f86f-53b4-4b95-8e24-17b53b0a5992%2Fq5f67nn_processed.jpeg&w=3840&q=75)
Transcribed Image Text:QUESTION 1
arad
The wall of a drying oven is constructed by sandwiching an insulation material of thermal
conductivity k = 0.0705 W/m-K between thin metal sheets. The oven air is at the
temperature, T₁ = 450°C, and the corresponding convection coefficient is h₁ = 20 W/m²K.
The inner wall surface absorbs a radiant flux of = 140 W/m² from hotter objects within
the oven. The room air is at the temperature, To = 21°C, and the overall coefficient for
convection and radiation from the outer surface is ho = 12 W/m²K. What insulation
thickness, L, is required to maintain the outer wall surface temperature at Twall = 72°C?
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