A -cm dlar сорper 933 kg/m3, c = 385 J/(kg °C)) sphere is heated in a convection furnace for a very long time so that its temperature becomes equal to the temperature of the air in the furnace at 260 °C. Then, the sphere is removed from the furnace and is placed in a forced convection flow where the heat transfer coefficient h is 17 W/(m² °C) and where the temperature is 38 °C. The sphere is allowed to remain in the flow for 450 seconds at which time it is returned to the convection furnace. After 900 seconds in the furnace, the temperature of the sphere is 240.5 °C. What is the temperature of the sphere just before it is returned to the furnace?
A -cm dlar сорper 933 kg/m3, c = 385 J/(kg °C)) sphere is heated in a convection furnace for a very long time so that its temperature becomes equal to the temperature of the air in the furnace at 260 °C. Then, the sphere is removed from the furnace and is placed in a forced convection flow where the heat transfer coefficient h is 17 W/(m² °C) and where the temperature is 38 °C. The sphere is allowed to remain in the flow for 450 seconds at which time it is returned to the convection furnace. After 900 seconds in the furnace, the temperature of the sphere is 240.5 °C. What is the temperature of the sphere just before it is returned to the furnace?
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.
Chapter5: Analysis Of Convection Heat Transfer
Section: Chapter Questions
Problem 5.54P
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