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Unread 10-21-2002, 03:56 AM   #11
Les
Cooling Savant
 
Join Date: Oct 2001
Location: Wigan UK
Posts: 929
Default Re: Why a large waterblock?

Quote:
Originally posted by Axly
Why should a waterblock be so large?
Heat spreading.
I would expect that for an 80sq mm die a 50x50mm wb with a 4mm bp to give lower temps than a 15x17mm wb (of any thickness) for Heat Tranfer Coeffs(water to bp) below ~80,000W/m*m*c .

The problem is determining the Heat Transfer Coeff from the water to the the bp.Some of my guesses(using Kryotherm):
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