Q2/ A 3-m internal diameter spherical tank made of 2-cm-thick stataless steel (k= 15 W/m0°C. The tank is located in a room whose%3DC) is used to store iced water at Tetemperature is T-22°C. The walls of the room are also at 22°C. The outer surface ofthe tank is black and heat transfer between the outer surface of the tank and thesurroundings is by natural convection and radiation. The convection heat transfercoefficients at the inner and the outer surfaces of the tank are h-80 W/m2 C and h10 W/m2 C, respectively. Determine (a) the rate of heat transfer to the iced water in thetank and (b) the amount of ice at 0°C that melts during a 24-h period.

Answered: Image /qna-images/answer/3e635080-6a7d-4048-80c5-9aa9fc864fbd.jpg

D2 A 3-m intemal diameter sphèrical tank made of 2-cm-thick staaless steel (k-15 W/m 0°C. The tank is located in a room whose C) is used to store iced water at Te emperature is T - 22°C. The walls of the room are also at 22°C. The outer surface of he tank is black and heat transfer between the outer surface of the tank and the urroundings is by natural convection and radiation. The convection heat transfer oefficients at the inner and the outer surfaces of the tank are h 80 W/m2 C and h O W/m2 C, respectively. Determine (a) the rate of heat transfer to the iced water in the ank and (b) the amount of ice at 0°C that melts during a 24-h period.

D2 A 3-m intemal diameter sphèrical tank made of 2-cm-thick staaless steel (k-15 W/m 0°C. The tank is located in a room whose C) is used to store iced water at Te emperature is T - 22°C. The walls of the room are also at 22°C. The outer surface of he tank is black and heat transfer between the outer surface of the tank and the urroundings is by natural convection and radiation. The convection heat transfer oefficients at the inner and the outer surfaces of the tank are h 80 W/m2 C and h O W/m2 C, respectively. Determine (a) the rate of heat transfer to the iced water in the ank and (b) the amount of ice at 0°C that melts during a 24-h period.

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

See similar textbooks

Similar questions

A flat wall is exposed to an environmental temperature of 38oC. The wall iscovered with a layer of insulation 2.5 cm thick with a thermal conductivity of 1.4W/moC, and a temperature of the inside wall is 315oC. The wall loses heat to theenvironment by convection. Compute the value of the convective heat transfercoefficient that must be maintained on the outer surface of the insulation to ensurethat the outer surface temperature does not exceed 41oC
Q3) Consider a 1.2 m high and 2 m wide double pane window shown in Figure, consisting of two 3 mm thick of glass ( k 0.78 W/m."C) separated by a 12 mm wide stagnant air space (k = 0.026 W/m."C).Determine the steady rate of heat transfer through this double %3D pane window and the temperature of its inner surface for a day during which the room is maintained at 24 °C while the temperature of the outdoor is -5 "C. Take the convection heat transfer coefficients on the inner and outer surfaces of the window to be hi Amm = 10 W/m2.C hz = 25 W/m2."C. Prae
Troom = 25°C Problem-4: An 8-m-internal-diameter spherical tank made of 1.5-cm-thick stainless steel (k = 15 W/m-K) is used to store iced water at 0°C. The tank is located in a room whose temperature is 25°C. The walls of the room are also at 25°C. The outer surface of the tank is black (emissivity = 1), and heat transfer between the outer surface of the tank and the surroundings is by natural convection and radiation. The convection heat transfer coefficients at the inner and the outer surfaces of the tank are 80 W/m²-K and 10 W/m².K, 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 the fusion of water at atmospheric pressure is hf5 333.7 kJ/kg. Iced water D D₁= 8 m Tin = 0°C 1.5 cm
Pr
A 20-cm diameter sphere has a surface temperature of 500 K. The sphere is suspended in 300 K still air. Find the heat transfer from the sphere. Neglect Radiation. (To find the heat transfer coefficient use Nusselt numbers) use properties of air at 300 K
The heat loss through the roof of a building is 32.4 kW during the winter, when the temperature and relative humidity inside the building are 22°C and 60% respectively, the temperature outside the building is -8°C, the dimensions of the ceiling are 12m x 25m. One of the engineers suggested adding a thermal insulator of thickness 2 cm to the roof so, the heating load from the ceiling reduced by half. Assume f-9.26 W/m. "C. Find: (a) Is the water vapor condenses on the inner surface of the roof before adding thermal insulator. (b) The thermal conductivity of the insulator, which proposed to add.
With the aid of a suitable diagram, differentiate the processes of heat transferred by a conduction and a force convection.
نقطتان )2( A sphere ( k=204 W/m K) with inner diameter 4 cm and outer diameter of 8 cm. The inside temperature is 100C and the outer temperature 50 C. Calculate the rate of heat transfer
Example of engineering application using Convection heat transfer. And draw a diagram of convection heat transfer. Note: Agricultural Machines only.