An electric fan has the motor inside a sphere of 25 cm diameter, which gives a uniformly distributed heat source of 2500 W/m2. A three blades of 50 cm long and 3 mm thickness and 15 cm wide are welded to the surface of the sphere. The convective heat transfer coefficient between the air and the blades is 15 W/me, and the thermal conductivity of the sphere and the blade is 8 W/m.cy and the ambient temperature is 5c. What is the temperature of the blade at 35 cm from the sphere, and the heat transferred by the three blades. An electric fan has the motor inside a sphere of25 cm diameter, which gives a uniformly distributedheat source of 2500 W/m³. A three blades of50 cm long and 3 mm thickness and 15 cm wideare welded to the surface of the sphere. Theconvective heat transfer coeftficient between theair and the blades is 15 W/mit ,and the thermalconductivity of the sphere and the blade is 8 Wm.c,and the ambient temperature is 5c.What is the temperature of the blade at 35 cmfrom the sphere, and the heat transferred by thethree blades .

Given: Heat generation from the sphere is 2500 W/m3. Diameter of the sphere is 25 cm. Dimension of…

Answered: An electric fan has the motor inside a…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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An electric fan has the motor inside a sphere of 25 cm diameter, which gives a uniformly distributed heat source of 2500 W/m2. A three blades of 50 cm long and 3 mm thickness and 15 cm wide are welded to the surface of the sphere. The convective heat transfer coefficient between the air and the blades is 15 W/me, and the thermal conductivity of the sphere and the blade is 8 W/m.cy and the ambient temperature is 5c. What is the temperature of the blade at 35 cm from the sphere, and the heat transferred by the three blades.

An electric fan has the motor inside a sphere of
25 cm diameter, which gives a uniformly distributed
heat source of 2500 W/m³. A three blades of
50 cm long and 3 mm thickness and 15 cm wide
are welded to the surface of the sphere. The
convective heat transfer coeftficient between the
air and the blades is 15 W/mit ,and the thermal
conductivity of the sphere and the blade is 8 Wm.c,
and the ambient temperature is 5c.
What is the temperature of the blade at 35 cm
from the sphere, and the heat transferred by the
three blades .

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