7. A 5-m-internal-diameter spherical tank made of 1.5-cm-thick stainless steel (k =15 W/m - °C) is used to store iced water at 0°C. The tank is located in a room whose temperature is 30°C. The walls of the room are also at 30°C. The heat transfer between the outer surface of the tank and the surroundings is by natural convection. The convection heat transfer coefficients at the inner and the outer surfaces of the tank are 80 W/m? - °C and 10 W/m² - °C, respectively. Determine (a) the rate of heat transfer to the iced water in the tank and (b) the amount of ice at 0°C that melts during a 24-h period. The heat of fusion of water at atmospheric pressure is hif = 333.7 kJ/kg.
7. A 5-m-internal-diameter spherical tank made of 1.5-cm-thick stainless steel (k =15 W/m - °C) is used to store iced water at 0°C. The tank is located in a room whose temperature is 30°C. The walls of the room are also at 30°C. The heat transfer between the outer surface of the tank and the surroundings is by natural convection. The convection heat transfer coefficients at the inner and the outer surfaces of the tank are 80 W/m? - °C and 10 W/m² - °C, respectively. Determine (a) the rate of heat transfer to the iced water in the tank and (b) the amount of ice at 0°C that melts during a 24-h period. The heat of fusion of water at atmospheric pressure is hif = 333.7 kJ/kg.
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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