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7. A 3-m-internal-diameter spherical tank made of 1-cm thick stainless steel is used to store iced water at 0°C. The tank is located outdoors at 25°C. Assuming the entire steel tank to be at 0°C and thus the thermal resistance of the tank to be negligible, determine a) the rate of heat transfer to the iced water in the tank b) the amount of ice at 0°C that melts during a 24-hour period. The heat of fusion of water at atmospheric pressure is 333.7 kJ/kg. The emissivity of the outer surface of the tank is 0.6, and the convection heat transfer coefficient on the outer surface can be taken to be 30 W/m2 - °C. Assume the average surrounding surface temperature for radiation exchange to be 15°C.

7. A 3-m-internal-diameter spherical tank made of 1-cm thick stainless steel is used to store iced water at 0°C. The tank is located outdoors at 25°C. Assuming the entire steel tank to be at 0°C and thus the thermal resistance of the tank to be negligible, determine a) the rate of heat transfer to the iced water in the tank b) the amount of ice at 0°C that melts during a 24-hour period. The heat of fusion of water at atmospheric pressure is 333.7 kJ/kg. The emissivity of the outer surface of the tank is 0.6, and the convection heat transfer coefficient on the outer surface can be taken to be 30 W/m2 - °C. Assume the average surrounding surface temperature for radiation exchange to be 15°C.

Elements Of Electromagnetics
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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7. A 3-m-internal-diameter spherical tank made of 1-cm thick stainless steel is used to store iced water at 0°C. The tank is located outdoors at 25°C. Assuming the entire steel tank to be at 0°C and thus the thermal resistance of the tank to be negligible, determine a) the rate of heat transfer to the iced water in the tank b) the amount of ice at 0°C that melts during a 24-hour period. The heat of fusion of water at atmospheric pressure is 333.7 kJ/kg. The emissivity of the outer surface of the tank is 0.6, and the convection heat transfer coefficient on the outer surface can be taken to be 30 W/m? · °C. Assume the average surrounding surface temperature for radiation exchange to be 15°C.
Transcribed Image Text:7. A 3-m-internal-diameter spherical tank made of 1-cm thick stainless steel is used to store iced water at 0°C. The tank is located outdoors at 25°C. Assuming the entire steel tank to be at 0°C and thus the thermal resistance of the tank to be negligible, determine a) the rate of heat transfer to the iced water in the tank b) the amount of ice at 0°C that melts during a 24-hour period. The heat of fusion of water at atmospheric pressure is 333.7 kJ/kg. The emissivity of the outer surface of the tank is 0.6, and the convection heat transfer coefficient on the outer surface can be taken to be 30 W/m? · °C. Assume the average surrounding surface temperature for radiation exchange to be 15°C.
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