2. A hot surface at 100°C is to be cooled by attaching 3-cm-long, 0.25-cm-diameter aluminium pin fins (k = 237W/m - °C) to it, with a center-to-center distance of 0.6 cm. The temperature of the surrounding medium is 30°C, and the heat transfer coefficient on the surfaces is 35 W/m? - °C. Determine the rate of heat transfer from the surface for a 1-m x1-m section of the plate. Also determine the overall effectiveness of the fins. 3 cm 0,6 0.25

2. A hot surface at 100°C is to be cooled by attaching 3-cm-long, 0.25-cm-diameter aluminium pin fins (k = 237W/m - °C) to it, with a center-to-center distance of 0.6 cm. The temperature of the surrounding medium is 30°C, and the heat transfer coefficient on the surfaces is 35 W/m? - °C. Determine the rate of heat transfer from the surface for a 1-m x1-m section of the plate. Also determine the overall effectiveness of the fins. 3 cm 0,6 0.25

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.60P

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Concept explainers

Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.

Question

Heat Transfer - Fins

See attached. Please assist.

2. A hot surface at 100°C is to be cooled by attaching 3-cm-long, 0.25-cm-diameter
aluminium pin fins (k = 237W/m - °C) to it, with a center-to-center distance of 0.6 cm.
The temperature of the surrounding medium is 30°C, and the heat transfer coefficient
on the surfaces is 35 W/m? · °C. Determine the rate of heat transfer from the surface
for a 1-m x1-m section of the plate. Also determine the overall effectiveness of the fins.
3 cm
0.6
t 0.25
em

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