The extended surface used for the enhancement of heat dissipation is
Convective coefficient
Fourier number
Fin
No finned surface
Answer
A steel rod (k = 30 W/m degree) 1 cm in diameter and 5 cm long protrudes from a wall which is maintained at 10 degree Celsius. The rod is insulated at its tip and is exposed to an environment with h = 50 W/m2 degree and t a = 30 degree Celsius. Calculate the fin efficiency
56.57%
66.57%
76.57%
86.57%
In order to achieve maximum heat dissipation, the fin should be designed in such a way that has a
The maximum lateral surface towards the tip side of the fin
The minimum lateral surface near the centerline
The maximum lateral surface at the root side of the fin
The maximum lateral surface near the center of the fin
A steel rod (k = 30 W/m degree) 1 cm in diameter and 5 cm long protrudes from a wall which is maintained at 10 degree Celsius. The rod is insulated at its tip and is exposed to an environment with h = 50 W/m2 degree and T a = 30 degree Celsius. Calculate the rate of heat dissipation
2.658 W
3.658 W
4.658 W
5.658 W
On a heat transfer surface, fins are provided to
Increase turbulence in flow for enhancing heat transfer
Increase temperature gradient so as to enhance heat transfer
Pressure drop of the fluid should be minimized
Surface area is maximum to promote the rate of heat transfer