3n a manufacturing process, long aluminum rods of squaire cross section withd 21 mmare cooled from an initial termperature of T = 400°C. V.T Which configuration (a or b) in the sketch should be used to minimize the time needed for the rods to reach a safe to hande temperature of 60rC when exposed to air in cross flow at V- 8 m/s. T, - 30'CWhat is the preferred configuration? The emissivity of the rods ise 0,10 and the surroundings temperature is T 20°C. Evaluate the properties of the air at 400 K and the properties of the aluminum at 500 K. Radiation can be neglected in a caleulation of the cooling time. ed cooling time, ins for the Configuration should be used to minimize cooling time
3n a manufacturing process, long aluminum rods of squaire cross section withd 21 mmare cooled from an initial termperature of T = 400°C. V.T Which configuration (a or b) in the sketch should be used to minimize the time needed for the rods to reach a safe to hande temperature of 60rC when exposed to air in cross flow at V- 8 m/s. T, - 30'CWhat is the preferred configuration? The emissivity of the rods ise 0,10 and the surroundings temperature is T 20°C. Evaluate the properties of the air at 400 K and the properties of the aluminum at 500 K. Radiation can be neglected in a caleulation of the cooling time. ed cooling time, ins for the Configuration should be used to minimize cooling time
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:3n amanufacturing process, lorg aluminum rods of square cross section with d 21 mm are cooled from an initial temperature of
T= 400°C.
V.T
Which configuration (a or b) in the sketch should be used to minimize the time needed for the rods to reach a safe-to handle
temperature of 60 C when exposed to air in cross flow at V = 8 m/s. T = 30C What is the required cooling tiene, in s, for the
preferred configuration? The emissivity of the rods ise = 0.10 and the surroundings temperature is T = 20C. Evakuate the
properties of the air at-400 K and the properties of the aluminum at S00 K. Radiation can be neglected ira caleulation of the Conling
time.
Configuration
vshould be used to minimize cooling time
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