An electric circuit board is to be cooled by forced convection through cooling fins. Heat of 100W needs to be removed from this board from a maximum temperature of 40 degree Celsius above the room air temperature of 20 degree Celsius. The forced convection heat transfer coefficient is 355W/(m2K). Determine the required surface area of the fins. ANSWER IN m2

Explanation:

Amount of heat to be removed,

Change in temperature,

The room air temperature,

The forced convection heat transfer coefficient, h = 355 W/(m²K)

Required surface area of the fins, A = ?

Given all the above parameters, the surface area of the fins is given by the formula:

1 a

2 b

3 b

4 d

5 d

6 d

explanation:

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