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Water Impingement Test Cold Plate

IP.com Disclosure Number: IPCOM000122203D
Original Publication Date: 1991-Nov-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 2 page(s) / 92K

Publishing Venue

IBM

Related People

Dolowitz, AP: AUTHOR [+2]

Abstract

There is no need for us to measure the efficiency of the cooling enhancements used in IBM's water-cooled TCM modules. These measurements are used for modelling and qualifying the performance of these enhancements. The determination of the cooling efficiency is done by dividing the temperature difference from the chip to the top surface of the module by the chip power. Determining chip temperature and power is straightforward, but determining the top surface temperature has been a difficult problem. Previous methods used for measurement limited the accurate enhancement calculation to the center 6x6 array of sites out of a 10x10 module array of sites.

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Water Impingement Test Cold Plate

      There is no need for us to measure the efficiency of the
cooling enhancements used in IBM's water-cooled TCM modules. These
measurements are used for modelling and qualifying the performance of
these enhancements.  The determination of the cooling efficiency is
done by dividing the temperature difference from the chip to the top
surface of the module by the chip power.  Determining chip
temperature and power is straightforward, but determining the top
surface temperature has been a difficult problem.  Previous methods
used for measurement limited the accurate enhancement calculation to
the center 6x6 array of sites out of a 10x10 module array of sites.

      Traditionally we have used thermocouples mounted in the top
surface of the module to determine the top surface temperature.
Computer algorithms are used on the thermocouple measurements to
generate localized top-surfaced temperatures.  The current method is
to generate temperature planes to produce the localized top surface
temperatures. This still has errors due to incomplete mating of the
module top surface and the cold plate carrying the cooling water.
Various enhancement materials have been used in the interface to
lower the temperature gradients making the temperature predictions
more accurate, but there is still a significant error in the
localized temperature prediction as you move out of the center.  Also
this method assumes the temperature gradients are smoo...