A 0.4-W cylindrical electronic component with diameter 0.3 cm and length 1.8 cm and mounted on a circuit board is cooled by air flowing across it at a velocity of 240 m/min. If the air temperature is 35°C, determine the surface temperature of the component. For air properties evaluations assume a film temperature of 50°C. Is this a good assumption?
A 0.4-W cylindrical electronic component with diameter 0.3 cm and length 1.8 cm and mounted on a circuit board is cooled by air flowing across it at a velocity of 240 m/min. If the air temperature is 35°C, determine the surface temperature of the component. For air properties evaluations assume a film temperature of 50°C. Is this a good assumption?
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.
Chapter7: Forced Convection Inside Tubes And Ducts
Section: Chapter Questions
Problem 7.22P
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A 0.4-W cylindrical electronic component with
diameter 0.3 cm and length 1.8 cm and mounted on a
circuit board is cooled by air flowing across it at a velocity
of 240 m/min. If the air temperature is 35°C, determine
the surface temperature of the component. For air properties
evaluations assume a film temperature of 50°C. Is this
a good assumption?
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