Q3. White potatoes (k = 0.50 W/m. °C and a = 0.13 x 10-6 m²/s) that are initially at a uniform temperature of 25°C and have an average diameter of 6 cm are to be cooled by refrigerated air at 2°C flowing at a velocity of 4 m/s. The average heat transfer coefficient between the potatoes and the air is experimentally determined to be 19 W/m². °C. Determine how long it will take for the center temperature of the potatoes to drop to 6°C.

Q3. White potatoes (k = 0.50 W/m. °C and a = 0.13 x 10-6 m²/s) that are initially at a uniform temperature of 25°C and have an average diameter of 6 cm are to be cooled by refrigerated air at 2°C flowing at a velocity of 4 m/s. The average heat transfer coefficient between the potatoes and the air is experimentally determined to be 19 W/m². °C. Determine how long it will take for the center temperature of the potatoes to drop to 6°C.

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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Question

Q3. White potatoes (k = 0.50 W/m. °C and a = 0.13 x 106 m²/s) that are initially at a
uniform temperature of 25°C and have an average diameter of 6 cm are to be
cooled by refrigerated air at 2°C flowing at a velocity of 4 m/s. The average
heat transfer coefficient between the potatoes and the air is experimentally
determined to be 19 W/m². °C. Determine how long it will take for the center
temperature of the potatoes to drop to 6°C.

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