Fin effectiveness vs fin efficiency for applications

[Urmi Roy]

So we've been doing fins in class.

I understand that the formulas for fin effectiveness and efficiency are similar, except the area used in the denominator (Ac i.e. area of cross-section for effectiveness and As i.e. surface area for efficiency).

However, my question is while designing a fin, which of these parameters is the more important to consider?, from a practical perspective.

Thanks,
Urmi

 

[Baluncore]

What is the subject of this post?
Fins used for stability in fluid flow?
Or maybe fins used in heat exchangers?
Can you provide a link to a relevant page?

 

[Urmi Roy]

Yeah I mean fins in heat transfer, like you use in electronic devices: http://en.wikipedia.org/wiki/Fin_(extended_surface )

 

[Baluncore]

Ah ha.
http://en.wikipedia.org/wiki/Fin_(extended_surface)#Fin_performance