A spherical container made of steel (ksteel = 15 W/m K) has a hot fluid inside at 100°C and is surrounded by cool air at 20°C. The spherical container has an inner diameter di = 20 cm and an outer diameter d2 = 24 cm. The hot fluid inside has a heat transfer coefficient of 200 W/m²-K, and the cool air outside provides a heat transfer coefficient of 100 W/m²K. Any radiation heat transfer may be neglected. Determine the rate of heat loss through the container wall.

A spherical container made of steel (ksteel = 15 W/m K) has a hot fluid inside at 100°C and is surrounded by cool air at 20°C. The spherical container has an inner diameter di = 20 cm and an outer diameter d2 = 24 cm. The hot fluid inside has a heat transfer coefficient of 200 W/m²-K, and the cool air outside provides a heat transfer coefficient of 100 W/m²K. Any radiation heat transfer may be neglected. Determine the rate of heat loss through the container wall.

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

Oil whose temperature is 30°C is flowed through a pipe with a diameter of 50 cm. The pipe is in an environment where the temperature is 20°C. So that not a lot of heat comes out of the pipe, the pipe is wrapped with an insulating material (k = 0.007 W/mK) as thick as 5 cm. If the convection coefficient of the outer surface of the pipe is 12 W/m²K, calculate the heat flow from the pipe per meter of length.
A 15 cm x 20 cm hot surface at 85°C is to be cooled by attaching 4 cm long aluminum (k = 237 W/m-°C) fins of 2 mm x 2 mm square cross section. The temperature of surrounding medium is 25°C and the heat transfer coefficient on the surfaces can be taken to be 20 W/m²-°C. If it is desired to triple the rate of heat transfer from the bare hot surface, determine the number of fins that needs to be attached. plot the number of fins as a function of the increase in the heat loss by fins relative to no fin case (i.e., overall effectiveness of the fins) in the range of 1.5 to 5. Discuss the results.
Heat is generated inside a solid cylinder (D=30 cm, L=90 cm, k=5 W/m.K ) at q=6x104 W/m2. Determine the surface temperature of the cylinder if it is surrounded with a fluid with Ta=20 oC, and ha=50 W/m2.K). Note that at the surface Qcond=Qconv
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
The wall of an oven in an industrial plant, made of fire brick (k = 0.71 W/m/K) has thickness of L = 15 cm. The oven is exposed to air at 28oC and the surfaces of the far surroundings are at 20oC. If the temperature of the outer surface of the wall is 92oC and the heat transfer coefficient and emissivity are 20 W/(m^2*K) and 0.8 respectively, determine the temperature of the inner surface of the wall.
kindly help me with this question. Thank you, I am having a hard time solving this
1- Consider a 1 m high and 2 m wide glass window whose thickness is 8 mm and thermal conductivity is k =0.68 W/m°C. Determine the steady rate of heat transfer through this glass window and temperature of its inner surface for a day during which the room is maintained at 22 °C while the temperature of the outdoors is -3 °C. Take convection heat transfer coefficients on the inner and outer surfaces of the window to be h, = 15 W/M2°C and h, = 20W/m°C .r