Estimate the heat transfer from a 40 W incandescent bulb at 125 degree Celsius to 25 degree Celsius in quiescent air. Approximate the bulb as a 50 mm diameter sphere. The approximate correlation for the convection coefficient is
Nu = 0.60 (Gr Pr) ^0.25

Question

TuteeHUB · Accepted Answer

7.71 W

TuteeHUB · Answer

n Where the different parameters are evaluated at the mean film temperature, and characteristics length is the diameter of the sphere

TuteeHUB · Answer

4.71 W

TuteeHUB · Answer

5.71 W

TuteeHUB · Answer

6.71 W

TuteeHUB · Answer

7.71 W

1.	Estimate the heat transfer from a 40 W incandescent bulb at 125 degree Celsius to 25 degree Celsius in quiescent air. Approximate the bulb as a 50 mm diameter sphere. The approximate correlation for the convection coefficient is Nu = 0.60 (Gr Pr) ^0.25
A.	n Where the different parameters are evaluated at the mean film temperature, and characteristics length is the diameter of the sphere
B.	4.71 W
C.	5.71 W
D.	6.71 W
E.	7.71 W
Answer» E. 7.71 W

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