An experiment is to be conducted to determine heat transfer coefficient on the surfaces of tomatoes that are placed in cold water at 7°C. The tomatoes (k = 0.59 W/m·K, a =0.141 * 10-6 m2/s, r = 999 kg/m3, cp = 3.99 kJ/kg·K) with an initial uniform temperature of 30°C are spherical in shape with a diameter of 8 cm. After a period of 2 h, the temperatures at the center and the surface of the tomatoes are measured to be 10.0°C and 7.1°C, respectively. Using analytical one-term approximation method (not the Heisler charts), determine the heat transfer coefficient and the amount of heat transfer during this period if there are eight such tomatoes in water.
An experiment is to be conducted to determine heat transfer coefficient on the surfaces of tomatoes that are placed in cold water at 7°C. The tomatoes (k = 0.59 W/m·K, a =0.141 * 10-6 m2/s, r = 999 kg/m3, cp = 3.99 kJ/kg·K) with an initial uniform temperature of 30°C are spherical in shape with a diameter of 8 cm. After a period of 2 h, the temperatures at the center and the surface of the tomatoes are measured to be 10.0°C and 7.1°C, respectively. Using analytical one-term approximation method (not the Heisler charts), determine the heat transfer coefficient and the amount of heat transfer during this period if there are eight such tomatoes in water.
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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An experiment is to be conducted to determine heat
transfer coefficient on the surfaces of tomatoes that are placed
in cold water at 7°C. The tomatoes (k = 0.59 W/m·K, a =0.141 * 10-6 m2/s, r = 999 kg/m3, cp = 3.99 kJ/kg·K) with an
initial uniform temperature of 30°C are spherical in shape with
a diameter of 8 cm. After a period of 2 h, the temperatures
at the center and the surface of the tomatoes are measured to
be 10.0°C and 7.1°C, respectively. Using analytical one-term
approximation method (not the Heisler charts), determine the
heat transfer coefficient and the amount of heat transfer during
this period if there are eight such tomatoes in water.
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