Browse Prior Art Database

Streamlined Stepped Heat Sink for Increased Flow and Thermal Performance

IP.com Disclosure Number: IPCOM000116486D
Original Publication Date: 1995-Sep-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Agonafer, D: AUTHOR [+3]

Abstract

A method for reducing the pressure drop of a high density finned heat sink while improving the heat transfer performance, along with a technique for manufacturing the heat sink is disclosed.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 78% of the total text.

Streamlined Stepped Heat Sink for Increased Flow and Thermal Performance

      A method for reducing the pressure drop of a high density
finned heat sink while improving the heat transfer performance, along
with a technique for manufacturing the heat sink is disclosed.

      In this disclosure, a variation of a stepped diameter fin is
described.  Instead of co-axial cylinders, a manufacturing technique
which will result in a streamlined diameter reduction is proposed.
Part a of the Figure shows the basic ideas of the invention.  A pin
fin heat sink for cooling electronics modules consists of a base (1)
and an array of pin fins (2).  The pin array can be of any
arrangement
that is acceptable to provide the cooling demanded.  In order to take
advantage of the thermal enhancement provided by a stepped-diameter
design, while at the same time reducing the flow resistance of the
array, the center portion (3) of the pin fins are reduced in diameter
through a series of rolling processes prior to assembly of the heat
sink.

      Another option resulting in a similar streamline pin fin heat
sink is shown in part b of the Figure.  In this option, the heat sink
is extruded as is common practice.  The die used in the extrusion
process provides the desired hour-glass Figure for each fin.  The
final shape fin is obtained by cross-cutting the parallel plate fins
into pin fins.  These fins will exhibit the streamlined shape in one
direction (the air flow direction) and...