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Heat Sinks with Counter Flow Channels

IP.com Disclosure Number: IPCOM000110181D
Original Publication Date: 1992-Sep-01
Included in the Prior Art Database: 2005-Mar-25
Document File: 1 page(s) / 54K

Publishing Venue

IBM

Related People

Agonafer, D: AUTHOR [+3]

Abstract

Many conventional cold plates, like the IBM 3090* cold plate, utilize many channels connected in serpentine-like form. Water flows serially along a given row of chips, and rises in temperature as it picks up heat in the downstream direction. As a result, the temperature difference between chip and heat sink, the driving force for heat transfer, decreases along the fluid path. This rise in temperature is expected to rise considerably as the power requirements of future systems rises. This water temperature rise is reduced by introducing counterflow channels. One possible application of counter flow channels is shown in the figure for a cooling concept called TOP-C5 (Thermally Optimized Pistons with Closely Coupled Convective Cooling Channels). (Image Omitted)

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Heat Sinks with Counter Flow Channels

       Many conventional cold plates, like the IBM 3090* cold
plate, utilize many channels connected in serpentine-like form.
Water flows serially along a given row of chips, and rises in
temperature as it picks up heat in the downstream direction.  As a
result, the temperature difference between chip and heat sink, the
driving force for heat transfer, decreases along the fluid path.
This rise in temperature is expected to rise considerably as the
power requirements of future systems rises.  This water temperature
rise is reduced by introducing counterflow channels.  One possible
application of counter flow channels is shown in the figure for a
cooling concept called TOP-C5 (Thermally Optimized Pistons with
Closely Coupled Convective Cooling Channels).

                            (Image Omitted)

      The flow is bifurcated into a counterflow arrangement that
balances the effect of water temperature rise across the chip row 1
and maximizes the temperature differential between water and piston 2
for maximum thermal performance.  The single channel that is present
in the conventional TOP-C5 is broken into a minimum of two channels
whereby two passes are made by the water in a given channel plane.
The channel furthest from the chip, known as the top channel 3, will
have the first pass of water in a given channel plane.  Flow in the
bottom channel 4 will counter the flow in the flow channel, e.g., i...